WO2018088457A1 - Holder for tool bit with exchangeable cutting edge and set of holder for tool bit with exchangeable cutting edge and wrench - Google Patents
Holder for tool bit with exchangeable cutting edge and set of holder for tool bit with exchangeable cutting edge and wrench Download PDFInfo
- Publication number
- WO2018088457A1 WO2018088457A1 PCT/JP2017/040357 JP2017040357W WO2018088457A1 WO 2018088457 A1 WO2018088457 A1 WO 2018088457A1 JP 2017040357 W JP2017040357 W JP 2017040357W WO 2018088457 A1 WO2018088457 A1 WO 2018088457A1
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- WIPO (PCT)
- Prior art keywords
- lower jaw
- wrench
- upper jaw
- concave surface
- side concave
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/04—Cutting-off tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
- B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
Definitions
- the present invention relates to a blade tip replaceable cutting tool holder to which, for example, a cutting insert for grooving and parting off is detachably attached, and a set of such a blade tip replaceable cutting tool holder and a wrench.
- Patent Documents 1 to 3 form an upper jaw part and a lower jaw part by forming an insert mounting seat at the front end of a plate-like holder body, and two pins project.
- the cutting insert for grooving and parting off is seated on the insert mounting seat in a state where the upper jaw is elastically deformed so as to be separated from the lower jaw by a wrench, and then the cutting insert is returned to its original state. What is pressed and clamped is described.
- Patent Document 1 a cylindrical hole into which one of the two pins of the wrench is inserted is formed in the upper jaw, and the other pin is inserted into the lower jaw.
- a blade-tip-replaceable tool holder in which a groove is formed is described.
- a concave portion that is recessed in an arc instead of a hole is formed in the upper jaw, and an arc-shaped groove is formed in the lower jaw.
- the inner wall surface of the groove facing the hole or recess is formed so that the distance from the center of the hole or recess gradually decreases toward the tip.
- a slit is formed on the rear end side of the insert mounting seat, and a pin having an oval cross section of a wrench is inserted into the slit so that the longitudinal direction thereof is along the extending direction of the slit. Then, by rotating the wrench and orienting the longitudinal direction of the ellipse formed by the cross section of the pin in the direction perpendicular to the extending direction of the slit, the edge of the pin facing this longitudinal direction is slidably contacted with the mutually facing inner surfaces of the slit.
- a blade tip replaceable bite holder that presses the upper jaw part and elastically deforms the upper jaw part so as to be separated from the lower jaw part.
- the pin of the wrench has a hole or hole in the upper jaw. Since the inner surface of the recess and the inner wall surface of the groove of the lower jaw or the inner surface of the slit are in sliding contact, the inner surface of the hole and the recess and the inner wall surface of the groove It is inevitable that abrasion will occur on the opposing inner surfaces of the slits.
- the upper jaw side slidable contact portion in which the space between the inner peripheral surface of the hole or recess and the inner wall surface of the groove is in sliding contact with the inner peripheral surface of the hole or recess of one of the two pins.
- the longitudinal direction of the ellipse of the pin with the oval cross-section of the wrench is equal to the interval between the inner surface of the groove of the other pin and the lower jaw side sliding contact portion that contacts the inner wall surface of the other pin If it becomes equal to the interval between the edges facing each other, the upper jaw cannot be elastically deformed so as to be separated from the lower jaw. Therefore, the worn-out blade type replaceable cutting tool holder has to be discarded, which is inefficient and uneconomical.
- the present invention has been made under such a background, and even if the holder main body wears out during repeated insertion / removal operations of the cutting insert, it can be used over a long period of time without being immediately discarded. It is an object of the present invention to provide a holder for a blade and a set of such a blade holder and a wrench.
- the cutting edge replaceable cutting tool holder includes a plate-like insert mounting portion provided on the holder body and a tip portion of the insert mounting portion.
- An insert mounting seat to which the cutting insert is detachably mounted is formed so as to penetrate in the thickness direction of the insert mounting portion, and at the rear end portion of the insert mounting seat, the insert mounting seat A slit that communicates and extends to the rear end side is formed, and one of the two inner side surfaces of the insert mounting seat that faces each other with the slit interposed therebetween is a seating surface on which the cutting insert is seated.
- the other inner side surface is a pressing surface that presses the cutting insert toward the seating surface, and the seating surface is formed among the insert mounting portions.
- a lower jaw part and the side on which the pressing surface is formed is an upper jaw part that can be elastically deformed in a direction away from the lower jaw part, and the upper jaw part has a rear end side with respect to the pressing surface.
- a concave surface on the upper jaw side that is recessed from the inner side surface of the upper jaw side is formed in a semi-elliptical arc shape having a long axis in the extending direction of the slit when viewed from the plate thickness direction.
- the lower jaw portion is formed with a plurality of lower jaw side concave surfaces that are recessed in an arc shape with respect to the upper jaw side concave surface when viewed from the plate thickness direction.
- the set of the cutting edge replaceable cutting tool holder and the wrench according to the present invention is attached to a plate-like insert mounting portion provided in the holder body so that the cutting insert is detachably attached to the tip end portion of the insert mounting portion.
- the insert mounting seat is formed so as to penetrate in the thickness direction of the insert mounting portion, and the rear end portion of the insert mounting seat is formed with a slit extending to the rear end side so as to communicate with the insert mounting seat.
- one inner surface is a seating surface on which the cutting insert is seated, and the other inner surface is the cutting insert.
- the pressing surface is pressed against the seating surface side, and the side of the insert mounting portion where the seating surface is formed is a lower jaw portion, and the pressing surface
- the blade-shaped replaceable cutting tool holder is an upper jaw portion that is elastically deformable in a direction away from the lower jaw portion, and the upper jaw portion of the blade-tip replaceable cutting tool holder is connected to the lower jaw portion.
- a recess having an upper jaw side concave surface that is arcuately recessed with respect to the slit is formed, and the lower jaw portion has an arc shape with respect to the upper jaw side concave surface when viewed from the plate thickness direction.
- a plurality of lower jaw side concave surfaces are formed, and the first lower jaw side concave surface of the plurality of lower jaw side concave surfaces protrudes from the side of the first wrench of the plurality of wrench.
- the upper jaw side sliding contact part of the pin The first wrench is slidably contacted with the first lower wrench side concave surface while the lower ridge side slidable contact portion of the pin protruding from the side portion of the first wrench is slidably contacted with the first lower wrench side concave surface.
- the first wrench is guided to a first elastic deformation position where the upper jaw part is elastically deformed in a direction away from the lower jaw part when rotated along the lower jaw side concave surface of the lower jaw part,
- the second lower jaw side concave surface is the upper jaw side concave contact surface of the upper jaw side sliding contact portion of the plurality of wrench protruding to the side of the second wrench.
- the lower wrench side sliding contact portion of the pin protruding from the side portion of the second wrench is brought into sliding contact with the second lower jaw side concave surface, and the second wrench is moved to the second wrench.
- the upper jaw part When the upper jaw part is rotated along the concave surface on the lower jaw side, the upper jaw part elastically changes in a direction away from the lower jaw part.
- the second wrench is guided to a second elastic deformation position to be formed, the distance A between the upper jaw side sliding contact portion and the lower jaw side sliding contact portion of the first wrench, and the upper jaw portion elastically deformed.
- a first difference AB which is a difference between a distance B between the most depressed position of the upper jaw-side concave surface and the first elastic deformation position of the first lower jaw-side concave surface in a state of not being The distance C between the upper jaw side sliding contact portion and the lower jaw side sliding contact portion of the second wrench, the most concave position of the upper jaw side concave surface in a state where the upper jaw portion is not elastically deformed, and the above
- a second difference CD which is a difference with the distance D from the second elastic deformation position of the second lower jaw side concave surface, is characterized by AB ⁇ CD.
- a plurality of lower jaw side concave surfaces are formed on the lower jaw portion with respect to the upper jaw side concave surface of the holder body, and the blade edge replaceable cutting tool holder and wrench of the present invention are provided.
- the first difference AB which is the difference between the distance B between the upper jaw side sliding contact portion and the lower jaw side sliding contact portion of the plurality of wrench (first and second wrench) to be elastically deformed
- the second difference CD which is the difference from the distance D from the second elastic deformation position of the concave surface, is set as AB ⁇ CD.
- the first lower jaw side concave surface is used by using a first wrench whose first difference AB is equal to or less than the second difference CD. Guide and perform cutting insert insertion and removal. And while repeating this attachment / detachment operation, the upper jaw part side sliding contact part and the lower jaw part side sliding contact part of the pin of the first wrench are in sliding contact with each other, so that the upper jaw part side concave surface of the holder body and the first lower jaw The part-side concave surface is worn away, and the distance A between the most concave position of the upper jaw-side concave surface and the first elastic deformation position of the first lower jaw-side concave surface is increased, and the first wrench is eventually added. It becomes equal to the distance B between the upper jaw side sliding contact portion and the lower jaw side sliding contact portion, and the upper jaw portion cannot be elastically deformed.
- the cutting insert is attached / detached using the second wrench.
- the second difference CD which is the difference D from the distance to the first elastic deformation position of the lower jaw side concave surface, to be greater than or equal to the first difference AB as described above (for example, (By making the most concave position of the concave surface on the upper jaw side retracted by abrasion by the first wrench)
- the upper jaw is elastically deformed by the second wrench and the cutting insert is attached / detached. It is possible to continue.
- the holder body can be used for a longer period of time, which is efficient and economical.
- the upper jaw side concave surface forms a semi-elliptical arc shape having a major axis in the direction in which the slit extends when viewed from the plate thickness direction. Even if a wrench having an oval cross-sectional pin described in Patent Document 4 is used as the first or second wrench, it can be inserted.
- the upper jaw side concave surface is not limited to such a semi-elliptical arc shape and recessed from the upper jaw side inner side surface, for example, Patent Document 1 may be an inner surface facing the lower jaw side of the cylindrical hole, or may be recessed in an arc from the inner side of the upper jaw side as described in Patent Document 3.
- one of the plurality of lower jaw side concave surfaces (first and second lower jaw side concave surfaces) is rearward of the seating surface as described in Patent Document 4.
- the other slit may be formed on the inner surface of the lower jaw side of the slit, and the other may be formed in an arc-shaped groove formed in the lower jaw away from the slit as described in Patent Documents 1 to 3. .
- the pin of the first or second wrench that is in sliding contact with one of the first lower jaw side concave surface and the second lower jaw side concave surface is described in Patent Document 4.
- the oval cross-sectional shape or the elliptical cross-section of the first mandibular part side concave surface and the first mandibular part side concave surface as the lower jaw side sliding contact part The other end portion is brought into sliding contact with the upper jaw side concave surface as the upper jaw side sliding contact portion.
- the plurality of lower jaw side concave surfaces are formed on the lower jaw portion away from the slit as described in Patent Document 3, and also away from each other.
- the plurality of arc-shaped grooves (first and second arc-shaped grooves) may be formed respectively.
- the present invention even if the holder main body is worn by sliding contact with the first wrench during the attachment / detachment operation of the cutting insert, it is not necessary to immediately discard the holder main body.
- the wrench can be attached and detached, and the holder body can be used for a long time, so that it is efficient and economical.
- FIG. 4 is an enlarged side view of an upper left insert mounting seat in the embodiment shown in FIG. 3.
- FIG. 3 is a perspective view of the 1st wrench used for the embodiment shown in FIG.
- FIG. 7 is a front view of the state shown in FIG.
- FIG. It is a side view of the state shown in FIG. It is a perspective view which shows the state and the cutting insert which rotated the 1st wrench from the state shown in FIG. 8, and elastically deformed the upper jaw part.
- FIG. It is a front view of the state shown in FIG. It is a side view of the state shown in FIG. It is a perspective view which shows the state which made the cutting insert seat on the insert mounting seat from the state shown in FIG.
- FIG. It is a perspective view which shows the state which rotated the 1st wrench in the direction opposite to the direction which elastically deformed the upper jaw part from the state shown in FIG. 14, and attached the cutting insert to the insert mounting seat.
- FIG. 14 It is a perspective view which shows the state which removed the 1st wrench from the state shown in FIG.
- FIG. 20 is a perspective view showing a state in which the pin of the second wrench shown in FIGS. 17 to 19 is inserted into the blade tip replaceable cutting tool holder shown in FIG. 1. It is a front view of the state shown in FIG. It is a side view of the state shown in FIG. It is a perspective view which shows the state and the cutting insert which rotated the 2nd wrench from the state shown in FIG. 20, and elastically deformed the upper jaw part. It is a front view of the state shown in FIG. It is a side view of the state shown in FIG.
- FIG. 26 It is a perspective view which shows the state which made the cutting insert seat on the insert mounting seat from the state shown in FIG. It is a perspective view which shows the state which attached the cutting insert to the insert mounting seat by rotating a 2nd wrench from the state shown in FIG. 26, and returning a pin to an insertion position. It is a perspective view of the blade-tip-exchange-type tool holder in the second embodiment of the present invention. It is a front view of embodiment shown in FIG. It is a side view of embodiment shown in FIG.
- FIG. 1 to FIG. 27 show a first embodiment of a blade tip replaceable cutting tool holder and a set of a blade tip replaceable cutting tool holder and a wrench according to the present invention.
- the blade tip replaceable cutting tool holder of the present embodiment has a holder body 1 formed of a steel material or the like in the shape of a substantially rectangular thin plate as shown in FIGS. 1 to 3, and two side surfaces 1A forming the rectangular shape. , Two end faces 1B along the short side of the rectangle facing the longitudinal direction of the rectangle (left and right in FIGS. 3 and 4), and two elongated faces 1C along the long side of the rectangle.
- the holder main body 1 passes through the center of the rectangle formed by the side surface 1A and extends around the center line extending in the plate thickness direction of the holder main body 1 (the left-right direction in FIG. 2; the direction orthogonal to the drawings in FIGS. 3 and 4). ° It has a rotationally symmetric shape.
- an insert having a thin plate shape is formed at two corners (upper left corner and lower right corner in FIG. 3) located on one diagonal line of the rectangle formed by the side surface 1 ⁇ / b> A.
- Each of the attachment portions 2 is formed.
- the tip side (left side in FIG. 4) of the elongated surface 1C is notched with a concave curve after forming a convex curve toward the tip side when viewed from the plate thickness direction.
- a notch 1D is formed.
- the two elongated surfaces 1C are convex V-shaped in a cross section perpendicular to the longitudinal direction. Is formed.
- Each insert mounting portion 2 has an insert mounting seat 3 that opens at the tip (upper left portion in FIG. 4) of each insert mounting portion 2.
- the thickness of the insert mounting portion 2 is the same as the thickness direction of the holder body 1. It is formed so as to penetrate in the direction.
- the insert mounting seat 3 moves toward the rear end side of the insert mounting portion 2 in the longitudinal direction of the holder main body 1, the elongated portion on the opposite side from the elongated surface 1 ⁇ / b> C of the holder main body 1 where the corner portion where the insert mounting portion 2 is formed is located. It inclines toward the surface 1C.
- a slit 4 is formed at the rear end portion of the insert mounting seat 3 so as to communicate with the insert mounting seat 3 and extend toward the rear end side of the insert mounting portion 2.
- the insert mounting seat 3 is formed with two inner surfaces facing each other with the slit 4 therebetween, and one of the inner surfaces facing the corner side where the insert mounting portion 2 is formed. Is a seating surface 3A on which the cutting insert I is seated, and the other inner surface is a pressing surface 3B that presses the cutting insert I toward the seating surface 3A.
- the seating surface 3A and the pressing surface 3B extend substantially parallel to each other as shown in FIG. 4 when the cutting insert I is removed, and are orthogonal to the direction in which the seating surface 3A and the pressing surface 3B extend.
- the cross section is formed in a convex V shape.
- the rear end portion of the insert mounting seat 3 between the seating surface 3A and the pressing surface 3B intersects the seating surface 3A at an acute angle and intersects the pressing surface 3B at an obtuse angle.
- a contact surface 3C that is substantially perpendicular to the longitudinal direction extending in the direction is formed to face the distal end side with a spacing from the seating surface 3A and the pressing surface 3B.
- the slit 4 extends from the contact surface 3C and the pressing surface 3B toward the rear end side substantially along the longitudinal direction, and the rear end portion of the slit 4 is connected to the insert mounting seat 3. It is formed wider than the opening tip.
- An escape portion 3D for avoiding interference with the cutting insert I is formed at a portion where the seating surface 3A and the contact surface 3C of the insert mounting seat 3 intersect.
- the side on which the pressing surface 3B is formed is the upper jaw portion 2A and the seating surface 3A is formed.
- the side is the lower jaw 2B.
- the width of the upper jaw 2A in the direction along the end face 1B is sufficiently smaller than the width of the lower jaw 2B, and the upper jaw 2A is centered on the rear end of the slit 4 with respect to the lower jaw 2B. It can be elastically deformed in the direction of separation.
- the inner surface on the upper jaw 2A side is the upper jaw side inner surface 4A
- the inner surface on the lower jaw 2B side is the inner side of the lower jaw. It is set as the side surface 4B.
- the upper jaw side inner side surface 4A and the lower jaw side inner side surface 4B are located at positions slightly separated from the insert mounting seat 3 toward the rear end side, respectively.
- Recesses recessed from 4B are formed.
- the inner surfaces of the recesses recessed from the upper jaw side inner side surface 4A are upper jaw side concave surfaces 5A
- the inner surfaces of the recesses recessed from the lower jaw side inner surface 4B are a plurality of recesses. It is set as the 1st lower jaw part side concave surface 5B among the lower jaw part side concave surfaces.
- the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B have long axes in the direction in which the slit 4 extends opposite to each other as shown in FIG. Are formed so as to form a semi-elliptical arc having the same size, and the most concave position of the first lower jaw side concave surface 5B opposite to the most concave position of the upper jaw side concave surface 5A is the first.
- the elastic deformation position is formed so as to form a semi-elliptical arc having the same size
- the lower jaw portion 2B has a substantially arcuate arc-shaped groove 6 centered at the most recessed position of the upper jaw-side concave surface 5A when viewed from the plate thickness direction, spaced from the insert mounting seat 3.
- the holder body 1 is formed so as to extend from the position substantially equal to the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B to the rear end side on the distal end side in the longitudinal direction. Is formed in a semicircular shape.
- the inner surface of the arcuate groove 6 facing the upper jaw side concave surface 5A is the second lower jaw side concave surface 6A of the plurality of lower jaw side concave surfaces, and this second lower jaw
- the distance between the concave side surface 6A and the position where the upper jaw side concave surface 5A is most recessed is formed so as to gradually decrease from the rear end of the arc-shaped groove 6 toward the front end side.
- the position of the tip is the second elastic deformation position.
- the cutting insert I that is detachably attached to such a blade-tip-replaceable cutting tool holder is used, for example, for grooving or parting, and is made of a hard metal such as cemented carbide having a hardness higher than that of the holder body 1.
- a thick plate-like insert main body 11 having a substantially pentagonal shape as shown in FIGS. 11 to 13 is provided. Of the five end surfaces of the insert body 11, one of the two end surfaces facing away from each other is a mounting surface 11 ⁇ / b> A that is in close contact with the seating surface 3 ⁇ / b> A of the insert mounting seat 3, and the other is a pressing surface 3 ⁇ / b> B. The pressed surface 11B is pressed.
- the mounting surface 11A and the pressed surface 11B are formed in a V-shaped cross section that can contact the seating surface 3A and the pressing surface 3B, respectively, and the distance from each other increases toward the rear end side of the insert body 11. Angled to be slightly wider. Further, the interval between the mounting surface 11A and the pressed surface 11B is slightly larger than the interval between the seating surface 3A and the pressing surface 3B in a state where the upper jaw portion 2A is not elastically deformed.
- the mounting surface 11A is seated on the seating surface 3A and the pressed surface 11B is pressed by the pressing surface 3B so that the cutting insert I is mounted on the insert mounting seat 3 toward the distal end side of the insert mounting portion 2.
- the end surface on the upper jaw 2A side connected to the pressed surface 11B is a rake face 11C
- the end surface on the lower jaw 2B side connected to the mounting surface 11A is a flank 11D.
- a cutting edge 12 longer than the plate thickness of the holder body 1 is formed at the intersection ridge line portion between the rake face 11C and the flank face 11D.
- the end surface that is continuous with the pressed surface 11B and faces the rear end side of the insert mounting portion 2 is a contacted surface 11E that is brought into contact with the abutting surface 3C of the insert mounting portion 2. .
- the first wrench W1 among a plurality of wrenches for attaching the cutting insert I to the insert mounting seat 3 of the holder body 1 is a steel material having a hardness equal to or higher than that of the holder body 1 or the like.
- the longitudinal end of the cylindrical shaft wrench body 21 (the left side in FIGS. 6 and 7) is perpendicular to the side of the wrench body 21.
- a pin 22 that is shorter than the protruding wrench body 21 has an L-shape formed integrally with the wrench body 21.
- the pin 22 has a cross section formed by the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B viewed from the plate thickness direction when the upper jaw portion 2A of the holder body 1 is not elastically deformed.
- the wrench main body 21 is formed in an elliptical shape having a major axis in the longitudinal direction of the wrench main body 21 so as to fit between the elliptical arcs.
- One end portion of the ellipse formed by the cross section of the pin 22 in the major axis direction is the upper jaw side sliding contact portion 22A of the first wrench W1, and the other end portion is the lower jaw side sliding portion of the first wrench W1.
- the end of the pin 22 on the wrench body 21 side in the longitudinal direction is the upper jaw side sliding contact portion 22A, and the opposite end is the lower jaw portion.
- Side sliding contact portion 22B The upper jaw side sliding contact portion 22A and the lower jaw side sliding contact portion 22B may be formed with small concave grooves extending in the longitudinal direction of the pin 22 (direction perpendicular to the longitudinal direction of the wrench main body 21). .
- the distance A in the major axis direction between the upper jaw side sliding contact portion 22A and the lower jaw side sliding contact portion 22B of the first wrench W1 is such that the upper jaw portion 2A is elastically deformed.
- the gap B between the most depressed position of the upper jaw-side concave surface 5A and the most depressed elastic deformation position of the first lower jaw-side concave surface 5B is set larger than the interval B.
- the difference AB of the distance B between the position and the first elastic deformation position of the first lower jaw side concave surface 5B is the first difference in the present embodiment.
- the insert mounting seat 3 to which the cutting insert I is attached is used.
- the wrench main body 21 is directed so as to extend toward the front end side of the holder main body 1, and the pin 22 is fitted between a semi-elliptical arc formed by the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B. 8 to 10, the pin 22 may be fitted so that the wrench body 21 extends to the rear end side of the holder body 1.
- the upper jaw side sliding contact portion 22A of the pin 22 is brought into sliding contact with the upper jaw side concave surface 5A, and the lower jaw side sliding contact portion 22B is moved to the first lower jaw.
- the wrench main body 21 of the first wrench W1 is rotated 90 ° upward along the first lower jaw side concave surface 5B while being brought into sliding contact with the lower side concave surface 5B, so that the upper jaw side sliding contact portion 22A becomes the upper jaw.
- the first wrench W1 is placed in the most concave position of the part-side concave surface 5A, and so that the lower jaw part-side sliding contact part 22B is arranged at the first elastic deformation position of the first lower jaw part-side concave surface 5B. Guide and position.
- the wrench body 21 may be rotated 90 ° downward. In this case, the upper jaw side sliding contact portion 22A and the lower jaw side sliding contact portion 22B are also reversed.
- the distance A between the upper jaw side sliding contact portion 22A and the lower jaw side sliding contact portion 22B of the first wrench W1 is the upper jaw side concave shape in a state where the upper jaw portion 2A is not elastically deformed. Since the distance B between the most concave position of the surface 5A and the elastic deformation position of the first lower jaw side concave surface 5B is larger, the upper jaw portion 2A becomes the lower jaw portion 2B by the first difference AB.
- the insert mounting seat 3 is expanded so that the gap between the pressing surface 3B of the upper jaw portion 2A and the seating surface 3A of the lower jaw portion 2B is increased. Therefore, as shown in FIG. 14, the cutting insert I is inserted into the expanded insert mounting seat 3 to bring the mounting surface 11A into close contact with the seating surface 3A, and the contacted surface 11E contacts the contact surface 3C. Then, the cutting insert I is seated on the insert mounting seat 3.
- the distance between the mounting surface 11A of the cutting insert I and the pressed surface 11B is as follows. Since the distance between the seating surface 3A and the pressing surface 3B of the insert mounting seat 3 in a state where the upper jaw portion 2A is not elastically deformed, the pressed surface 11B of the cutting insert I is pressed by the pressing surface 3B. As shown in FIG. 16, it is pressed and sandwiched between the upper jaw 2A and the lower jaw 2B while being elastically deformed, and is attached to the insert mounting seat 3.
- the holder body 1 with the cutting insert I attached to the insert mounting seat 3 is attached to the tool rest of the machine tool, and the cutting blade 12 of the cutting insert I is cut into the rotating work material to be cut. Turning such as grooving and parting off. Further, when the cutting edge 12 of the cutting insert I is worn and reaches the end of its life during the turning process, the upper jaw 2A of the holder body 1 is elastically moved by the first wrench W1 in the same procedure as described above. The cutting insert I which has been deformed and the cutting blade 12 is worn is removed and replaced with a new cutting insert I to continue the turning process.
- the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B are worn by sliding contact with the pin 22 of the first wrench W1. Due to this wear, the gap A between the upper jaw side sliding contact portion 22A and the lower jaw side sliding contact portion 22B of the first wrench W1 and the upper jaw side concave surface in a state where the upper jaw portion 2A is not elastically deformed.
- the distance B between the most recessed position of 5A and the elastic deformation position of the first lower jaw side concave surface 5B becomes equal and the first difference AB becomes 0, the first wrench W1 is rotated.
- the upper jaw 2A is not elastically deformed, and the cutting insert I cannot be attached or detached.
- the second wrench W2 is formed of a steel material or the like having a hardness equal to or higher than that of the holder body 1 in the same manner as the first wrench W1, and is formed in the longitudinal direction of the cylindrical shaft-shaped wrench body 31.
- Two pins 32 and 33 of equal length shorter than the wrench main body 31 projecting perpendicularly to the side of the wrench main body 31 are parallel to each other at the tip (the left portion in FIGS. 18 and 19).
- a substantially F-shape formed integrally with the wrench body 31 is formed.
- these pins 32 and 33 are circular in cross section, and the diameters of the pins 32 and 33 are the upper jaw side concave surface 5A and the first lower jaw side concave surface.
- the distance between the most recessed positions of 5B and the groove width of the arc-shaped groove 6 are made smaller.
- the interval between the pins 32 and 33 is such that one of these pins 32 and 33 is inserted between the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B, and the other is located behind the holder body 1.
- the size is such that it can be inserted into the rear end of the arcuate groove 6 on the end side.
- the front end side edge portion of the outer peripheral surface and the rear end side edge portion of the other outer peripheral surface of the pins 32, 33 located on the rear end side are the upper jaw side sliding contact portion and lower jaw portion side of the second wrench W2.
- the rear end side edge portion of the outer peripheral surface of the first pin 32 located on the rear end side in the longitudinal direction of the wrench body 31 is the upper slidable side contact portion of the second wrench W2.
- the distal end side edge portion of the outer peripheral surface of the second pin 33 located on the distal end side opposite to this is the lower jaw side sliding contact portion 33A of the second wrench W2.
- the distance C between the upper jaw side sliding contact portion 32A and the lower jaw side sliding contact portion 33A of the second wrench W2 in the longitudinal direction of the wrench main body 31 is a state in which the upper jaw portion 2A is not elastically deformed.
- the distance D between the most concave position of the upper jaw side concave surface 5A and the second elastic deformation position of the tip of the second lower jaw side concave surface 6A of the arc-shaped groove 6 is made larger.
- the difference C ⁇ D in the distance D between the position and the second elastic deformation position of the second lower jaw side concave surface 6A is the second difference in the present embodiment.
- the second difference CD is larger than the first difference AB.
- the second difference CD is the most concave of the upper jaw side concave surface 5A in a state where the upper jaw 2A is not elastically deformed with respect to the first difference AB.
- (AB) + (AB) /2 1.5 ⁇ (AB).
- the first wrench W2 of the second wrench W2 is first lifted as shown in FIGS.
- the pin 32 is inserted between the upper jaw side concave surface 5 ⁇ / b> A and the first lower jaw side concave surface 5 ⁇ / b> B, and the second pin 33 is inserted into the rear end portion of the holder body 1 of the arc-shaped groove 6.
- the upper jaw side sliding contact portion 32A of the first pin 32 is brought into sliding contact with the upper jaw side concave surface 5A, and the lower jaw of the second pin 33 is placed.
- the lower jaw portion side sliding contact portion 33A is at the tip of the arc-shaped groove 6
- the second wrench W2 is guided and positioned so as to be arranged at the second elastic deformation position of the second lower jaw side concave surface 6A.
- the second pin 33 of the second wrench W2 is inserted between the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B, and the first pin 32 is arcuate.
- the groove 6 is inserted into the rear end of the holder body 1 so that the second pin 33 is brought into sliding contact with the upper jaw side concave surface 5A and the first pin 32 is brought into sliding contact with the second lower jaw side concave surface 6A.
- the second wrench is arranged such that the first pin 32 is disposed at the second elastic deformation position of the second lower jaw side concave surface 6A at the tip of the arcuate groove 6. W2 may be guided. In this case, the upper jaw side sliding contact portion 32A and the lower jaw side sliding contact portion 33A of the second wrench W2 are also reversed.
- the inner surface facing the upper jaw side concave surface 5A of the arc-shaped groove 6 is the second lower jaw side concave surface 6A.
- the interval between the second lower jaw side concave surface 6A and the position where the upper jaw side concave surface 5A is most recessed is formed so as to gradually decrease from the rear end of the arc-shaped groove 6 toward the front end side.
- the lower jaw of the second wrench W2 Since the distance C between 32A and the lower jaw side sliding contact portion 33A is large and the second difference CD which is the difference is larger than the first difference AB, the lower jaw of the second wrench W2 The part side sliding contact part 33A is in sliding contact with the second lower jaw part side concave surface 6A and the upper jaw part 2A can be elastically deformed again.
- the second wrench W2 When the lower jaw side sliding contact portion 33A reaches the second elastic deformation position, the second wrench W2 is positioned, and the interval between the seating surface 3A of the insert mounting seat 3 and the pressing surface 3B is increased. .
- the second pin 33 of the second wrench W2 is connected to the rear end portion of the arc-shaped groove 6.
- the new cutting insert I has a pressed surface 11B as a pressing surface 3B as shown in FIG. It is pressed and attached to the insert mounting seat 3. Therefore, it is possible to remove the second wrench from this state and turn the work material again with the new cutting insert I, and to continue the attaching / detaching operation of the cutting insert I with the second wrench W2. It becomes.
- the holder main body can be removed by attaching and detaching the cutting insert I with the first wrench W1 among the plurality of wrench. Even if the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B are worn and the cutting insert I cannot be attached or detached by the first wrench W1, the holder body 1 is discarded. Without this, the attaching / detaching operation of the new cutting insert I can be continued by the second wrench W2 of the plurality of wrench. For this reason, the holder body 1 can be used effectively and can be used for a long time, which is efficient and economical.
- the second difference CD is larger than 1.5 ⁇ (AB) with respect to the first difference AB, and the first wrench W1.
- the distance A between the upper jaw side sliding contact portion 22A and the lower jaw side sliding contact portion 22B is such that the most depressed position of the upper jaw side concave surface 5A and the first lower jaw in a state where the upper jaw portion 2A is not elastically deformed.
- the second wrench W2 is used when it is worn until it becomes equal to the distance B from the elastic deformation position of the part-side concave surface 5B, but the second difference CD is changed to the first difference AB.
- the upper jaw side concave surface 5A has a semi-elliptical arc shape having a major axis in the direction in which the slit 4 extends when viewed from the plate thickness direction of the holder body 1. It is formed so as to be recessed from the side inner side surface 4A.
- the first lower jaw side concave surface 5B that forms the first elastic deformation position facing the upper jaw side concave surface 5A also forms a semi-elliptical arc shape having a long axis in the direction in which the slit 4 extends.
- the wrench body 21 Since it is formed so as to be recessed from the inner side surface 4B, the wrench body 21 is inserted using the first wrench W1 having a pin 22 having an elliptical or elliptical cross section as described in Patent Document 4. Since the mounting seat 3 can be expanded and only one pin 22 is required, it is more efficient.
- the second lower jaw side concave surface 6A with which the lower jaw side sliding contact portion 33A of the second wrench W2 is in sliding contact is formed in the arc-shaped groove 6 formed in the lower jaw portion 2B away from the slit 4. Is formed. That is, since the second lower jaw side concave surface 6A is formed at a position different from the first lower jaw side concave surface 5B with which the first wrench W1 is in sliding contact, the wear of the holder body 1 is further suppressed. In addition, it is possible to provide a blade holder with a replaceable cutting edge that has a longer life.
- the upper jaw side concave surface 5A may be an inner surface facing the lower jaw portion 2B side of the cylindrical hole formed in the upper jaw portion 2A as described in Patent Document 1, for example. 3 may be recessed in an arc shape from the upper jaw side inner side surface 4A.
- the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B are opposed to the upper jaw side inner side surface 4A and the lower jaw side inner side surface 4B facing each other with the slit 4 therebetween.
- the first lower jaw side concave surface 7A and the second lower jaw side concave surface as in the second embodiment of the present invention showing the blade-tip-exchangeable tool holder in FIGS. 8A may be formed in the first arcuate groove 7 and the second arcuate groove 8 formed in the lower jaw portion 2B apart from the slit 4 and also from each other.
- the same reference numerals are assigned to portions common to the first embodiment.
- the first arcuate groove 7 is formed on the insert mounting seat 3 side of the lower jaw 2B, and the second arcuate groove 8 is different from the first arcuate groove 7 in the insert mounting seat 3.
- the first lower jaw side concave surface 7A and the second lower jaw side concave surface 8A facing the most concave position of the upper jaw side concave surface 5A are the most concave positions of the upper jaw side concave surface 5A.
- the upper jaw side concave surface 5A has a substantially semicircular arc shape recessed from the upper jaw side inner side surface 4A, and the first lower jaw side concave surface 5B is not formed on the lower jaw side inner side surface 4B.
- the first and second wrench for elastically deforming the upper jaw portion 2A of the second embodiment as described above are not shown, but the second wrench W2 of the first embodiment shown in FIGS.
- the size and interval of the first and second pins are such that one of the first pin and the second pin is fitted into the upper jaw side concave surface 5A, and the other is the first and second pins.
- the first wrench can be inserted into the rear end of the first arcuate groove 7, and the second wrench can be inserted into the rear end of the second arcuate groove 8.
- the distances A and C between the upper jaw side sliding contact portion and the lower jaw side sliding contact portion of the first and second wrench are the same as the most recessed position of the upper jaw side concave surface 5A of the holder body 1.
- the second lower jaw side concave surfaces 7A and 8A are larger than the distances B and D from the first and second elastic deformation positions, and the second difference CD is greater than the first difference AB. Is set to be large.
- the first arcuate groove 7 is first obtained by using the first wrench and the same operation as the attachment / detachment operation of the cutting insert I by the second wrench W2 of the first embodiment.
- the cutting insert is attached and detached using the first lower jaw side concave surface 7A.
- the upper jaw side concave surface 5A and the first lower jaw side concave surface 7A are worn away by the attaching / detaching operation by the first wrench, it becomes impossible or difficult to attach or detach the cutting insert.
- the second lower jaw side concave surface 8A of the second arcuate groove 8 using a wrench, the upper jaw 2A can be elastically deformed again and the cutting insert can be attached / detached. As efficient as the embodiment, it is economical.
- the upper jaw side concave surface 5A formed on the upper jaw 2A has a semicircular arc shape. Therefore, the radius of curvature at the most concave position and the depth from the upper jaw side inner side surface 4A are the first. If it is the same as the upper ellipse side concave surface 5A of the semi-elliptical arc shape as in the embodiment, the portion where the upper jaw portion 2A is notched by the upper jaw side concave surface 5A can be reduced as much as possible. For this reason, it can suppress that the rigidity of 2 A of upper jaws falls, and it becomes possible to press the cutting insert I with sufficient elastic force, and to attach to the insert attaching part 2, and to perform stable turning.
- the portion where the upper jaw 2A is cut out becomes larger, but the first and second lower jaw side concave surfaces 7A are formed in the first and second arc-shaped grooves 7 and 8 as in the present embodiment.
- the upper jaw 2A is elastically deformed by forming 8A, a cylindrical hole or the like is formed in the upper jaw 2A as described above, and the inner surface facing the lower jaw 2B side of this hole is the upper jaw side concave surface It may be 5A.
- three or more arc-shaped grooves are formed in the lower jaw part to form a lower jaw part side concave surface, respectively, and an interval between the upper jaw part side sliding contact part and the lower jaw part side sliding contact part of three or more wrenches,
- the difference between the elastic deformation position of each lower jaw side concave surface and the distance between the upper jaw side concave surface is increased stepwise, or the upper jaw side concave surface is semi-elliptical like the first embodiment.
- the lower jaw side concave surface, and the first difference AB in the first embodiment is different from the first difference AB and the second difference CD in the second embodiment.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
The present invention enables a holder body to be used over a long period of time without being immediately discarded when wear occurs as a result of repeated attaching and detaching of cutting inserts. At an insert attachment section 2 of a holder body 1, the side where a seating surface 3A of an insert attachment seat 3 is formed constitutes a lower jaw part 2B, and the side where a pressing surface 3B is formed constitutes an upper jaw part 2A which can be elastically deformed in a direction away from the lower jaw part 2B. At the upper jaw part 2A, an upper-jaw-side recessed surface 5A is formed on the upper-jaw-side inner surface 4A of a slit 4 of the holder body 1 located rearward of the pressing surface 3B, the upper-jaw-side recessed surface being formed in a semi-oval arc-like shape having a major axis in the direction in which the slit 4 extends when viewed from the plate thickness direction of the holder body 1 and being recessed from the upper-jaw-side inner surface 4A. The lower jaw part 2B has formed thereon multiple lower-jaw-side recessed surfaces 5B, 6A recessed in an arc-like shape with respect to the upper-jaw-side recessed surface 5A when viewed from the plate thickness direction.
Description
本発明は、例えば溝入れ・突っ切り加工用の切削インサートが着脱可能に取り付けられる刃先交換式バイト用ホルダ、およびこのような刃先交換式バイト用ホルダとレンチのセットに関するものである。
The present invention relates to a blade tip replaceable cutting tool holder to which, for example, a cutting insert for grooving and parting off is detachably attached, and a set of such a blade tip replaceable cutting tool holder and a wrench.
このような刃先交換式バイト用ホルダとして、特許文献1~3には、板状のホルダ本体先端部にインサート取付座を形成することによって上顎部と下顎部とを形成し、2つのピンが突出したレンチによって上顎部を下顎部に対して離間するように弾性変形させた状態で溝入れ・突っ切り加工用の切削インサートをインサート取付座に着座させた後、元の状態に戻すことにより切削インサートを押圧してクランプするようにしたものが記載されている。
As such blade-tip-exchangeable tool holders, Patent Documents 1 to 3 form an upper jaw part and a lower jaw part by forming an insert mounting seat at the front end of a plate-like holder body, and two pins project. The cutting insert for grooving and parting off is seated on the insert mounting seat in a state where the upper jaw is elastically deformed so as to be separated from the lower jaw by a wrench, and then the cutting insert is returned to its original state. What is pressed and clamped is described.
ここで、特許文献1には、上顎部にレンチの2つのピンのうち一方のピンが挿入される円筒状の孔が形成されるとともに、下顎部には他方のピンが挿入される長楕円形状の溝が形成された刃先交換式バイト用ホルダが記載されている。また、特許文献3に記載された刃先交換式バイト用ホルダでは、上顎部に孔ではなく円弧状に凹む凹部が形成され、下顎部には弧状の溝が形成されている。
Here, in Patent Document 1, a cylindrical hole into which one of the two pins of the wrench is inserted is formed in the upper jaw, and the other pin is inserted into the lower jaw. A blade-tip-replaceable tool holder in which a groove is formed is described. Moreover, in the blade-tip-exchangeable cutting tool holder described in Patent Document 3, a concave portion that is recessed in an arc instead of a hole is formed in the upper jaw, and an arc-shaped groove is formed in the lower jaw.
これら特許文献1~3に記載された刃先交換式バイト用ホルダでは、孔や凹部側を向く溝の内壁面は先端側に向けて孔や凹部の中心との距離が漸次小さくなるように形成されており、レンチの2つのピンのうち一方を孔や凹部の内側面に摺接させるとともに、他方のピンを溝の上記内壁面に摺接させつつ、レンチを先端側に向けて回転させることによって上顎部を押し上げ、下顎部に対して離間するように弾性変形させる。
In these blade-tip-replaceable cutting tool holders described in Patent Documents 1 to 3, the inner wall surface of the groove facing the hole or recess is formed so that the distance from the center of the hole or recess gradually decreases toward the tip. By rotating one of the two pins of the wrench in contact with the inner surface of the hole or recess, and rotating the wrench toward the tip while sliding the other pin against the inner wall surface of the groove The upper jaw is pushed up and elastically deformed so as to be separated from the lower jaw.
また、特許文献4には、インサート取付座の後端側にスリットを形成して、このスリットにレンチの断面長円状のピンを、その長手方向がスリットの延びる方向に沿うように挿入した上で、レンチを回転させてピンの断面がなす長円の長手方向をスリットの延びる方向に垂直な方向に向けることにより、この長手方向を向くピンの縁部をスリットの互いに対向する内面に摺接させて上顎部を押圧し、下顎部に対して離間するように弾性変形させる刃先交換式バイト用ホルダが記載されている。
Further, in Patent Document 4, a slit is formed on the rear end side of the insert mounting seat, and a pin having an oval cross section of a wrench is inserted into the slit so that the longitudinal direction thereof is along the extending direction of the slit. Then, by rotating the wrench and orienting the longitudinal direction of the ellipse formed by the cross section of the pin in the direction perpendicular to the extending direction of the slit, the edge of the pin facing this longitudinal direction is slidably contacted with the mutually facing inner surfaces of the slit There is described a blade tip replaceable bite holder that presses the upper jaw part and elastically deforms the upper jaw part so as to be separated from the lower jaw part.
ところで、このような刃先交換式バイト用ホルダでは、切削インサートの交換を行うためにレンチを回転させて上顎部を下顎部に対して弾性変形させる際には、レンチのピンが上顎部の孔や凹部の内周面および下顎部の溝の内壁面、あるいはスリットの内面と摺接することになるので、切削インサートの着脱操作を繰り返すうちには、孔や凹部の内周面および溝の内壁面やスリットの対向する内面に摩滅が生じることが避けられない。
By the way, in such a blade-tip-exchangeable bite holder, when the upper chin is elastically deformed with respect to the lower jaw by rotating the wrench in order to replace the cutting insert, the pin of the wrench has a hole or hole in the upper jaw. Since the inner surface of the recess and the inner wall surface of the groove of the lower jaw or the inner surface of the slit are in sliding contact, the inner surface of the hole and the recess and the inner wall surface of the groove It is inevitable that abrasion will occur on the opposing inner surfaces of the slits.
そして、この摩滅により、孔や凹部の内周面と溝の内壁面との間の間隔が、2つのピンのうち一方のピンの孔や凹部の内周面と摺接する上顎部側摺接部と他方のピンの溝の内壁面に摺接する下顎部側摺接部との間隔と等しくなったり、スリットの対向する内面の間の間隔がレンチの断面長円状のピンの長円の長手方向を向く縁部同士の間隔と等しくなったりすると、上顎部を下顎部に対して離間するように弾性変形させることができなくなってしまう。従って、そのように摩滅した刃先交換式バイト用ホルダは廃棄せざるを得ず、非効率的かつ非経済的であった。
Then, due to this abrasion, the upper jaw side slidable contact portion in which the space between the inner peripheral surface of the hole or recess and the inner wall surface of the groove is in sliding contact with the inner peripheral surface of the hole or recess of one of the two pins. The longitudinal direction of the ellipse of the pin with the oval cross-section of the wrench is equal to the interval between the inner surface of the groove of the other pin and the lower jaw side sliding contact portion that contacts the inner wall surface of the other pin If it becomes equal to the interval between the edges facing each other, the upper jaw cannot be elastically deformed so as to be separated from the lower jaw. Therefore, the worn-out blade type replaceable cutting tool holder has to be discarded, which is inefficient and uneconomical.
本発明は、このような背景の下になされたもので、切削インサートの着脱操作を繰り返すうちにホルダ本体に摩滅が生じても直ぐに廃棄することなく長期に亙って使用可能な刃先交換式バイト用ホルダ、およびこのような刃先交換式バイト用ホルダとレンチのセットを提供することを目的としている。
The present invention has been made under such a background, and even if the holder main body wears out during repeated insertion / removal operations of the cutting insert, it can be used over a long period of time without being immediately discarded. It is an object of the present invention to provide a holder for a blade and a set of such a blade holder and a wrench.
上記の課題を解決して、このような目的を達成するために、本発明の刃先交換式バイト用ホルダは、ホルダ本体に設けられた板状のインサート取付部に、このインサート取付部の先端部に開口して切削インサートが着脱可能に取り付けられるインサート取付座が該インサート取付部の板厚方向に貫通するように形成されるとともに、このインサート取付座の後端部には、該インサート取付座に連通して後端側に延びるスリットが形成されており、上記スリットを間にして対向する上記インサート取付座の2つの内側面のうち、一方の内側面は上記切削インサートが着座させられる着座面とされるとともに、他方の内側面は上記切削インサートを上記着座面側に押圧する押圧面とされ、上記インサート取付部のうち、上記着座面が形成された側は下顎部とされるとともに、上記押圧面が形成された側は上記下顎部に対して離間する方向に弾性変形可能な上顎部とされ、上記上顎部には、上記押圧面よりも後端側の上記スリットの上顎部側内側面に、上記板厚方向から見て、上記スリットが延びる方向に長軸を有する半楕円弧状をなして上記上顎部側内側面から凹む上顎部側凹状面が形成されるとともに、上記下顎部には、上記板厚方向から見て上記上顎部側凹状面に対して弧状をなして凹む複数の下顎部側凹状面が形成されていることを特徴とする。
In order to solve the above-described problems and achieve such an object, the cutting edge replaceable cutting tool holder according to the present invention includes a plate-like insert mounting portion provided on the holder body and a tip portion of the insert mounting portion. An insert mounting seat to which the cutting insert is detachably mounted is formed so as to penetrate in the thickness direction of the insert mounting portion, and at the rear end portion of the insert mounting seat, the insert mounting seat A slit that communicates and extends to the rear end side is formed, and one of the two inner side surfaces of the insert mounting seat that faces each other with the slit interposed therebetween is a seating surface on which the cutting insert is seated. The other inner side surface is a pressing surface that presses the cutting insert toward the seating surface, and the seating surface is formed among the insert mounting portions. Is a lower jaw part, and the side on which the pressing surface is formed is an upper jaw part that can be elastically deformed in a direction away from the lower jaw part, and the upper jaw part has a rear end side with respect to the pressing surface. On the inner side surface of the upper jaw side of the slit, a concave surface on the upper jaw side that is recessed from the inner side surface of the upper jaw side is formed in a semi-elliptical arc shape having a long axis in the extending direction of the slit when viewed from the plate thickness direction. In addition, the lower jaw portion is formed with a plurality of lower jaw side concave surfaces that are recessed in an arc shape with respect to the upper jaw side concave surface when viewed from the plate thickness direction.
また、本発明の刃先交換式バイト用ホルダとレンチのセットは、ホルダ本体に設けられた板状のインサート取付部に、このインサート取付部の先端部に開口して切削インサートが着脱可能に取り付けられるインサート取付座が該インサート取付部の板厚方向に貫通するように形成されるとともに、このインサート取付座の後端部には、該インサート取付座に連通して後端側に延びるスリットが形成されて、上記スリットを間にして対向する上記インサート取付座の2つの内側面のうち、一方の内側面は上記切削インサートが着座させられる着座面とされるとともに、他方の内側面は上記切削インサートを上記着座面側に押圧する押圧面とされ、上記インサート取付部のうち、上記着座面が形成された側は下顎部とされるとともに、上記押圧面が形成された側は上記下顎部に対して離間する方向に弾性変形可能な上顎部とされた刃先交換式バイト用ホルダと、この刃先交換式バイト用ホルダの上記上顎部を上記下顎部に対して離間する方向に弾性変形させる複数のレンチとを備えた刃先交換式バイト用ホルダとレンチのセットであって、上記上顎部には、上記押圧面よりも後端側に、上記板厚方向から見て、弧状をなして上記スリットに対して凹む上顎部側凹状面を有する凹部が形成されるとともに、上記下顎部には、上記板厚方向から見て上記上顎部側凹状面に対して弧状をなして凹む複数の下顎部側凹状面が形成され、上記複数の下顎部側凹状面のうち第1の下顎部側凹状面は、上記複数のレンチのうち第1のレンチの側部に突出するピンの上顎部側摺接部を上記上顎部側凹状面に摺接させるとともに、上記第1のレンチの側部に突出するピンの下顎部側摺接部を上記第1の下顎部側凹状面に摺接させつつ、この第1のレンチを上記第1の下顎部側凹状面に沿って回転させた際に、上記上顎部が上記下顎部に対して離間する方向に弾性変形させられる第1の弾性変形位置に上記第1のレンチを案内し、上記複数の下顎部側凹状面のうち第2の下顎部側凹状面は、上記複数のレンチのうち第2のレンチの側部に突出するピンの上顎部側摺接部を上記上顎部側凹状面に摺接させるとともに、上記第2のレンチの側部に突出するピンの下顎部側摺接部を上記第2の下顎部側凹状面に摺接させつつ、この第2のレンチを上記第2の下顎部側凹状面に沿って回転させた際に、上記上顎部が上記下顎部に対して離間する方向に弾性変形させられる第2の弾性変形位置に上記第2のレンチを案内し、上記第1のレンチの上顎部側摺接部と下顎部側摺接部との間隔Aと、上記上顎部が弾性変形していない状態における上記上顎部側凹状面の最も凹んだ位置と上記第1の下顎部側凹状面の第1の弾性変形位置との間隔Bとの差である第1の差A-Bと、上記第2のレンチの上顎部側摺接部と下顎部側摺接部との間隔Cと、上記上顎部が弾性変形していない状態における上記上顎部側凹状面の最も凹んだ位置と上記第2の下顎部側凹状面の第2の弾性変形位置との間隔Dとの差である第2の差C-Dとが、A-B≦C-Dであることを特徴とする。
In addition, the set of the cutting edge replaceable cutting tool holder and the wrench according to the present invention is attached to a plate-like insert mounting portion provided in the holder body so that the cutting insert is detachably attached to the tip end portion of the insert mounting portion. The insert mounting seat is formed so as to penetrate in the thickness direction of the insert mounting portion, and the rear end portion of the insert mounting seat is formed with a slit extending to the rear end side so as to communicate with the insert mounting seat. Of the two inner surfaces of the insert mounting seat facing each other with the slit in between, one inner surface is a seating surface on which the cutting insert is seated, and the other inner surface is the cutting insert. The pressing surface is pressed against the seating surface side, and the side of the insert mounting portion where the seating surface is formed is a lower jaw portion, and the pressing surface The blade-shaped replaceable cutting tool holder is an upper jaw portion that is elastically deformable in a direction away from the lower jaw portion, and the upper jaw portion of the blade-tip replaceable cutting tool holder is connected to the lower jaw portion. A set of wrench holders and a wrench having a plurality of wrench that are elastically deformed in a direction away from each other, wherein the upper jaw portion has a rear end side with respect to the pressing surface, and the thickness direction from the plate thickness direction. A recess having an upper jaw side concave surface that is arcuately recessed with respect to the slit is formed, and the lower jaw portion has an arc shape with respect to the upper jaw side concave surface when viewed from the plate thickness direction. A plurality of lower jaw side concave surfaces are formed, and the first lower jaw side concave surface of the plurality of lower jaw side concave surfaces protrudes from the side of the first wrench of the plurality of wrench. The upper jaw side sliding contact part of the pin The first wrench is slidably contacted with the first lower wrench side concave surface while the lower ridge side slidable contact portion of the pin protruding from the side portion of the first wrench is slidably contacted with the first lower wrench side concave surface. The first wrench is guided to a first elastic deformation position where the upper jaw part is elastically deformed in a direction away from the lower jaw part when rotated along the lower jaw side concave surface of the lower jaw part, Of the plurality of lower jaw side concave surfaces, the second lower jaw side concave surface is the upper jaw side concave contact surface of the upper jaw side sliding contact portion of the plurality of wrench protruding to the side of the second wrench. The lower wrench side sliding contact portion of the pin protruding from the side portion of the second wrench is brought into sliding contact with the second lower jaw side concave surface, and the second wrench is moved to the second wrench. When the upper jaw part is rotated along the concave surface on the lower jaw side, the upper jaw part elastically changes in a direction away from the lower jaw part. The second wrench is guided to a second elastic deformation position to be formed, the distance A between the upper jaw side sliding contact portion and the lower jaw side sliding contact portion of the first wrench, and the upper jaw portion elastically deformed. A first difference AB, which is a difference between a distance B between the most depressed position of the upper jaw-side concave surface and the first elastic deformation position of the first lower jaw-side concave surface in a state of not being The distance C between the upper jaw side sliding contact portion and the lower jaw side sliding contact portion of the second wrench, the most concave position of the upper jaw side concave surface in a state where the upper jaw portion is not elastically deformed, and the above A second difference CD, which is a difference with the distance D from the second elastic deformation position of the second lower jaw side concave surface, is characterized by AB ≦ CD.
本発明の刃先交換式バイト用ホルダにおいては、ホルダ本体の上顎部側凹状面に対して下顎部に複数の下顎部側凹状面が形成されており、本発明の刃先交換式バイト用ホルダとレンチのセットのように、上顎部側凹状面の最も凹んだ位置とこれらの下顎部側凹状面(第1、第2の下顎部側凹状面)の弾性変形位置との間隔Aと、上顎部を弾性変形させる複数のレンチ(第1、第2のレンチ)の上顎部側摺接部と下顎部側摺接部との間隔Bとの差である上記第1の差A-Bと、第2のレンチの上顎部側摺接部と下顎部側摺接部との間隔Cと、上顎部が弾性変形していない状態における上顎部側凹状面の最も凹んだ位置と上記第2の下顎部側凹状面の第2の弾性変形位置との間隔Dとの差である第2の差C-Dとが、A-B≦C-Dとしておいて、まず初めに刃先交換式バイト用ホルダを使用する際には、第1の差A-Bが第2の差C-D以下の第1のレンチを用いて第1の下顎部側凹状面により案内して切削インサートの着脱操作を行う。そして、この着脱操作を繰り返すうちには、第1のレンチのピンの上顎部側摺接部と下顎部側摺接部が摺接することにより、ホルダ本体の上顎部側凹状面と第1の下顎部側凹状面が摩滅して、上顎部側凹状面の最も凹んだ位置と第1の下顎部側凹状面の第1の弾性変形位置との間隔Aが大きくなってゆき、やがて第1のレンチの上顎部側摺接部と下顎部側摺接部との間隔Bと等しくなって、上顎部を弾性変形させることができなくなる。
In the blade tip replaceable cutting tool holder of the present invention, a plurality of lower jaw side concave surfaces are formed on the lower jaw portion with respect to the upper jaw side concave surface of the holder body, and the blade edge replaceable cutting tool holder and wrench of the present invention are provided. As shown in the set, the distance A between the most concave position of the upper jaw side concave surface and the elastic deformation position of these lower jaw side concave surfaces (first and second lower jaw side concave surfaces), and the upper jaw portion The first difference AB, which is the difference between the distance B between the upper jaw side sliding contact portion and the lower jaw side sliding contact portion of the plurality of wrench (first and second wrench) to be elastically deformed, and the second The distance C between the upper jaw side sliding contact portion and the lower jaw side sliding contact portion of the wrench, the most depressed position of the upper jaw side concave surface when the upper jaw portion is not elastically deformed, and the second lower jaw side The second difference CD, which is the difference from the distance D from the second elastic deformation position of the concave surface, is set as AB ≦ CD. First, when using the blade-tip replaceable cutting tool holder, the first lower jaw side concave surface is used by using a first wrench whose first difference AB is equal to or less than the second difference CD. Guide and perform cutting insert insertion and removal. And while repeating this attachment / detachment operation, the upper jaw part side sliding contact part and the lower jaw part side sliding contact part of the pin of the first wrench are in sliding contact with each other, so that the upper jaw part side concave surface of the holder body and the first lower jaw The part-side concave surface is worn away, and the distance A between the most concave position of the upper jaw-side concave surface and the first elastic deformation position of the first lower jaw-side concave surface is increased, and the first wrench is eventually added. It becomes equal to the distance B between the upper jaw side sliding contact portion and the lower jaw side sliding contact portion, and the upper jaw portion cannot be elastically deformed.
そこで、このように第1のレンチによって上顎部を弾性変形させることができなくなったなら、次に第2のレンチを用いて切削インサートの着脱操作を行う。そして、この第2のレンチの上顎部側摺接部と下顎部側摺接部との間隔Cと、上顎部が弾性変形していない状態における上顎部側凹状面の最も凹んだ位置と第2の下顎部側凹状面の第1の弾性変形位置との間隔との差Dである第2の差C-Dを、上述のように上記第1の差A-B以上とすることにより(例えば、第1のレンチによる摩滅によって上顎部側凹状面の最も凹んだ位置が後退したときの後退量よりも大きくすることにより)、第2のレンチによって上顎部を弾性変形させて切削インサートの着脱操作を続行することが可能となる。
Therefore, if the upper jaw can no longer be elastically deformed by the first wrench in this way, the cutting insert is attached / detached using the second wrench. The distance C between the upper jaw side sliding contact portion and the lower jaw side sliding contact portion of the second wrench, the most recessed position of the upper jaw side concave surface in the state where the upper jaw portion is not elastically deformed, and the second By setting the second difference CD, which is the difference D from the distance to the first elastic deformation position of the lower jaw side concave surface, to be greater than or equal to the first difference AB as described above (for example, (By making the most concave position of the concave surface on the upper jaw side retracted by abrasion by the first wrench), the upper jaw is elastically deformed by the second wrench and the cutting insert is attached / detached. It is possible to continue.
従って、上記構成の刃先交換式バイト用ホルダ、および刃先交換式バイト用ホルダとレンチのセットによれば、ホルダ本体をより長期に亙って使用することができ、効率的かつ経済的である。また、本発明の刃先交換式バイト用ホルダでは、上記上顎部側凹状面が、上記板厚方向から見て、上記スリットが延びる方向に長軸を有する半楕円弧状をなして上記上顎部側内側面から凹むように形成されており、特許文献4に記載された断面長円状のピンを有するレンチを第1または第2のレンチとして用いる場合でも挿入可能である。なお、本発明の刃先交換式バイト用ホルダとレンチのセットにおいては、上顎部側凹状面はこのような半楕円弧状をなして上顎部側内側面から凹むものに限定はされず、例えば特許文献1に記載されているように円筒状の孔の下顎部側を向く内面であってもよく、また特許文献3に記載されているように上顎部側内側面から円弧状に凹むものでもよい。
Therefore, according to the blade tip replaceable cutting tool holder configured as described above, and the blade tip replaceable cutting tool holder and wrench set, the holder body can be used for a longer period of time, which is efficient and economical. Further, in the blade tip replaceable cutting tool holder according to the present invention, the upper jaw side concave surface forms a semi-elliptical arc shape having a major axis in the direction in which the slit extends when viewed from the plate thickness direction. Even if a wrench having an oval cross-sectional pin described in Patent Document 4 is used as the first or second wrench, it can be inserted. In addition, in the set of the blade edge replaceable cutting tool holder and the wrench of the present invention, the upper jaw side concave surface is not limited to such a semi-elliptical arc shape and recessed from the upper jaw side inner side surface, for example, Patent Document 1 may be an inner surface facing the lower jaw side of the cylindrical hole, or may be recessed in an arc from the inner side of the upper jaw side as described in Patent Document 3.
また、本発明においては、上記複数の下顎部側凹状面(第1、第2の下顎部側凹状面)のうち、1つは特許文献4に記載されたように上記着座面よりも後端側の上記スリットの下顎部側内側面に形成されるとともに、他方は特許文献1~3に記載されたように上記スリットから離れて上記下顎部に形成された弧状溝に形成されていてもよい。この場合に、上記第1の下顎部側凹状面と上記第2の下顎部側凹状面とのうちの一方に摺接する第1または第2のレンチの上記ピンは、特許文献4に記載されたように断面長円形状また断面楕円形状をなして、その長軸方向の一端部が上記下顎部側摺接部として上記第1の下顎部側凹状面と上記第2の下顎部側凹状面とのうちの一方に摺接するとともに、他端部が上記上顎部側摺接部として上記上顎部側凹状面に摺接させられる。さらに、上記複数の下顎部側凹状面(第1、第2の下顎部側凹状面)が、特許文献3に記載されたように上記スリットから離れるとともに、互いにも離れて上記下顎部に形成された複数の弧状溝(第1、第2の弧状溝)にそれぞれ形成されていてもよい。
Further, in the present invention, one of the plurality of lower jaw side concave surfaces (first and second lower jaw side concave surfaces) is rearward of the seating surface as described in Patent Document 4. The other slit may be formed on the inner surface of the lower jaw side of the slit, and the other may be formed in an arc-shaped groove formed in the lower jaw away from the slit as described in Patent Documents 1 to 3. . In this case, the pin of the first or second wrench that is in sliding contact with one of the first lower jaw side concave surface and the second lower jaw side concave surface is described in Patent Document 4. The oval cross-sectional shape or the elliptical cross-section of the first mandibular part side concave surface and the first mandibular part side concave surface as the lower jaw side sliding contact part The other end portion is brought into sliding contact with the upper jaw side concave surface as the upper jaw side sliding contact portion. Further, the plurality of lower jaw side concave surfaces (first and second lower jaw side concave surfaces) are formed on the lower jaw portion away from the slit as described in Patent Document 3, and also away from each other. The plurality of arc-shaped grooves (first and second arc-shaped grooves) may be formed respectively.
以上説明したように、本発明によれば、ホルダ本体に切削インサートの着脱操作の際の第1のレンチの摺接による摩滅が生じても、直ぐにホルダ本体を廃棄する必要が無くなって、第2のレンチによって着脱操作を行うことが可能となり、長期に亙ってホルダ本体を使用することができるので、効率的かつ経済的である。
As described above, according to the present invention, even if the holder main body is worn by sliding contact with the first wrench during the attachment / detachment operation of the cutting insert, it is not necessary to immediately discard the holder main body. The wrench can be attached and detached, and the holder body can be used for a long time, so that it is efficient and economical.
図1ないし図27は本発明の刃先交換式バイト用ホルダ、および刃先交換式バイト用ホルダとレンチのセットの第1の実施形態を示すものである。本実施形態の刃先交換式バイト用ホルダは、そのホルダ本体1が鋼材等により図1ないし図3に示すような略長方形の薄板状に形成されていて、この長方形状をなす2つの側面1Aと、この長方形の長手方向(図3および図4において左右方向)を向いて該長方形の短辺に沿う2つの端面1Bと、該長方形の長辺に沿う2つの細長面1Cとを備えている。また、ホルダ本体1は、側面1Aがなす長方形の中心を通ってホルダ本体1の板厚方向(図2における左右方向。図3および図4において図面に直交する方向)に延びる中心線回りに180°回転対称形状とされている。
FIG. 1 to FIG. 27 show a first embodiment of a blade tip replaceable cutting tool holder and a set of a blade tip replaceable cutting tool holder and a wrench according to the present invention. The blade tip replaceable cutting tool holder of the present embodiment has a holder body 1 formed of a steel material or the like in the shape of a substantially rectangular thin plate as shown in FIGS. 1 to 3, and two side surfaces 1A forming the rectangular shape. , Two end faces 1B along the short side of the rectangle facing the longitudinal direction of the rectangle (left and right in FIGS. 3 and 4), and two elongated faces 1C along the long side of the rectangle. Further, the holder main body 1 passes through the center of the rectangle formed by the side surface 1A and extends around the center line extending in the plate thickness direction of the holder main body 1 (the left-right direction in FIG. 2; the direction orthogonal to the drawings in FIGS. 3 and 4). ° It has a rotationally symmetric shape.
本実施形態のホルダ本体1では、側面1Aがなす長方形の1つの対角線上に位置する2つの角部(図3において左上と右下の角部)に、ホルダ本体1と同じく薄板状をなすインサート取付部2がそれぞれ形成されている。なお、これらの角部において、上記細長面1Cの先端側(図4において左側)には、上記板厚方向から見て先端側に向かうに従い凸曲線をなした後に凹曲線をなして切り欠かれた切欠部1Dが形成されている。また、この切欠部1Dから長手方向に僅かに間隔をあけた位置から反対側の後端側(図4において右側)では、2つの細長面1Cは上記長手方向に直交する断面において凸V字状に形成されている。
In the holder main body 1 of the present embodiment, an insert having a thin plate shape is formed at two corners (upper left corner and lower right corner in FIG. 3) located on one diagonal line of the rectangle formed by the side surface 1 </ b> A. Each of the attachment portions 2 is formed. At these corners, the tip side (left side in FIG. 4) of the elongated surface 1C is notched with a concave curve after forming a convex curve toward the tip side when viewed from the plate thickness direction. A notch 1D is formed. Further, on the opposite rear end side (right side in FIG. 4) from the position slightly spaced in the longitudinal direction from the notch 1D, the two elongated surfaces 1C are convex V-shaped in a cross section perpendicular to the longitudinal direction. Is formed.
各インサート取付部2には、それぞれのインサート取付部2の先端部(図4において左上側部分)に開口するインサート取付座3が、ホルダ本体1の板厚方向と同じインサート取付部2の板厚方向に貫通するように形成されている。インサート取付座3は、ホルダ本体1の長手方向におけるインサート取付部2の後端側に向かうに従い、インサート取付部2が形成された角部が位置するホルダ本体1の細長面1Cから反対側の細長面1Cに向けて傾斜している。また、インサート取付座3の後端部には、該インサート取付座3に連通してインサート取付部2の後端側に延びるスリット4が形成されている。
Each insert mounting portion 2 has an insert mounting seat 3 that opens at the tip (upper left portion in FIG. 4) of each insert mounting portion 2. The thickness of the insert mounting portion 2 is the same as the thickness direction of the holder body 1. It is formed so as to penetrate in the direction. As the insert mounting seat 3 moves toward the rear end side of the insert mounting portion 2 in the longitudinal direction of the holder main body 1, the elongated portion on the opposite side from the elongated surface 1 </ b> C of the holder main body 1 where the corner portion where the insert mounting portion 2 is formed is located. It inclines toward the surface 1C. A slit 4 is formed at the rear end portion of the insert mounting seat 3 so as to communicate with the insert mounting seat 3 and extend toward the rear end side of the insert mounting portion 2.
従って、インサート取付座3には、このスリット4を間にして互いに対向する2つの内側面が形成されることになり、このうちインサート取付部2が形成された角部側を向く一方の内側面は切削インサートIが着座させられる着座面3Aとされるとともに、他方の内側面は切削インサートIを着座面3A側に押圧する押圧面3Bとされている。なお、これら着座面3Aと押圧面3Bは、切削インサートIが取り外された状態では図4に示すように互いに略平行に延びているとともに、この着座面3Aと押圧面3Bが延びる方向に直交する断面においては凸V字状に形成されている。
Accordingly, the insert mounting seat 3 is formed with two inner surfaces facing each other with the slit 4 therebetween, and one of the inner surfaces facing the corner side where the insert mounting portion 2 is formed. Is a seating surface 3A on which the cutting insert I is seated, and the other inner surface is a pressing surface 3B that presses the cutting insert I toward the seating surface 3A. The seating surface 3A and the pressing surface 3B extend substantially parallel to each other as shown in FIG. 4 when the cutting insert I is removed, and are orthogonal to the direction in which the seating surface 3A and the pressing surface 3B extend. The cross section is formed in a convex V shape.
また、これら着座面3Aと押圧面3Bとの間のインサート取付座3の後端部には、着座面3Aに対しては鋭角に交差する方向で、押圧面3Bに対しては鈍角に交差する方向に延びる上記長手方向に略垂直な当接面3Cが、着座面3Aおよび押圧面3Bと間隔をあけて先端側を向くように形成されている。上記スリット4は、この当接面3Cと上記押圧面3Bの間から上記長手方向に略沿って後端側に向けて延びているとともに、このスリット4の後端部は、インサート取付座3に開口する先端部よりも幅広に形成されている。なお、インサート取付座3の着座面3Aと当接面3Cとが交差する部分には、切削インサートIとの干渉を避けるための逃げ部3Dが形成されている。
Further, the rear end portion of the insert mounting seat 3 between the seating surface 3A and the pressing surface 3B intersects the seating surface 3A at an acute angle and intersects the pressing surface 3B at an obtuse angle. A contact surface 3C that is substantially perpendicular to the longitudinal direction extending in the direction is formed to face the distal end side with a spacing from the seating surface 3A and the pressing surface 3B. The slit 4 extends from the contact surface 3C and the pressing surface 3B toward the rear end side substantially along the longitudinal direction, and the rear end portion of the slit 4 is connected to the insert mounting seat 3. It is formed wider than the opening tip. An escape portion 3D for avoiding interference with the cutting insert I is formed at a portion where the seating surface 3A and the contact surface 3C of the insert mounting seat 3 intersect.
このようなインサート取付座3と上記スリット4によって分けられたインサート取付部2の2つの部分うち、上記押圧面3Bが形成された側は上顎部2Aとされるとともに、着座面3Aが形成された側は下顎部2Bとされる。ここで、上記端面1Bに沿った方向の上顎部2Aの幅は下顎部2Bの幅よりも十分に小さくされており、上顎部2Aはスリット4の後端部を中心に下顎部2Bに対して離間する方向に弾性変形可能とされている。また、スリット4の上記先端部の互いに対向する2つの内側面のうち、上顎部2A側の内側面は上顎部側内側面4Aとされるとともに、下顎部2B側の内側面は下顎部側内側面4Bとされる。
Of the two portions of the insert mounting portion 2 divided by the insert mounting seat 3 and the slit 4, the side on which the pressing surface 3B is formed is the upper jaw portion 2A and the seating surface 3A is formed. The side is the lower jaw 2B. Here, the width of the upper jaw 2A in the direction along the end face 1B is sufficiently smaller than the width of the lower jaw 2B, and the upper jaw 2A is centered on the rear end of the slit 4 with respect to the lower jaw 2B. It can be elastically deformed in the direction of separation. Of the two inner surfaces facing each other at the tip of the slit 4, the inner surface on the upper jaw 2A side is the upper jaw side inner surface 4A, and the inner surface on the lower jaw 2B side is the inner side of the lower jaw. It is set as the side surface 4B.
そして、これら上顎部側内側面4Aと下顎部側内側面4Bには、インサート取付座3よりも後端側に僅かに離れた位置に、それぞれ該上顎部側内側面4Aと下顎部側内側面4Bから凹む凹部が形成されており、これらの凹部のうち上顎部側内側面4Aから凹む凹部の内面は上顎部側凹状面5Aとされ、下顎部側内側面4Bから凹む凹部の内面は複数の下顎部側凹状面のうちの第1の下顎部側凹状面5Bとされる。これら上顎部側凹状面5Aと第1の下顎部側凹状面5Bとは、本実施形態では上記板厚方向から見て図4に示すように、互いに対向してスリット4が延びる方向に長軸を有する等しい大きさの半楕円弧状をなすように形成されており、上顎部側凹状面5Aの最も凹んだ位置に対向する第1の下顎部側凹状面5Bの最も凹んだ位置が第1の弾性変形位置とされる。
The upper jaw side inner side surface 4A and the lower jaw side inner side surface 4B are located at positions slightly separated from the insert mounting seat 3 toward the rear end side, respectively. Recesses recessed from 4B are formed. Among these recesses, the inner surfaces of the recesses recessed from the upper jaw side inner side surface 4A are upper jaw side concave surfaces 5A, and the inner surfaces of the recesses recessed from the lower jaw side inner surface 4B are a plurality of recesses. It is set as the 1st lower jaw part side concave surface 5B among the lower jaw part side concave surfaces. In the present embodiment, the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B have long axes in the direction in which the slit 4 extends opposite to each other as shown in FIG. Are formed so as to form a semi-elliptical arc having the same size, and the most concave position of the first lower jaw side concave surface 5B opposite to the most concave position of the upper jaw side concave surface 5A is the first. The elastic deformation position.
一方、上記下顎部2Bには、上記板厚方向から見て上顎部側凹状面5Aの最も凹んだ位置を略中心とした概略円弧状の弧状溝6が、インサート取付座3と間隔をあけて、ホルダ本体1の上記長手方向先端側において上顎部側凹状面5Aおよび第1の下顎部側凹状面5Bと略等しい位置から後端側に延びるように形成されており、この弧状溝6の両端は半円状に形成されている。そして、この弧状溝6の先端の上記上顎部側凹状面5Aに対向する内面が複数の下顎部側凹状面のうちの第2の下顎部側凹状面6Aとされており、この第2の下顎部側凹状面6Aと、上顎部側凹状面5Aが最も凹んだ位置との間隔は、弧状溝6の後端から先端側に向かうに従い漸次小さくなるように形成されていて、この弧状溝6の先端の位置が第2の弾性変形位置とされる。
On the other hand, the lower jaw portion 2B has a substantially arcuate arc-shaped groove 6 centered at the most recessed position of the upper jaw-side concave surface 5A when viewed from the plate thickness direction, spaced from the insert mounting seat 3. The holder body 1 is formed so as to extend from the position substantially equal to the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B to the rear end side on the distal end side in the longitudinal direction. Is formed in a semicircular shape. The inner surface of the arcuate groove 6 facing the upper jaw side concave surface 5A is the second lower jaw side concave surface 6A of the plurality of lower jaw side concave surfaces, and this second lower jaw The distance between the concave side surface 6A and the position where the upper jaw side concave surface 5A is most recessed is formed so as to gradually decrease from the rear end of the arc-shaped groove 6 toward the front end side. The position of the tip is the second elastic deformation position.
このような刃先交換式バイト用ホルダに着脱可能に取り付けられる上記切削インサートIは、例えば溝入れ加工や突っ切り加工に用いられるものであって、ホルダ本体1よりも高硬度の超硬合金等の硬質材料により形成された、上記板厚方向から見て図11ないし図13に示すような略偏五角形の厚肉板状のインサート本体11を備えている。このインサート本体11の5つの端面のうち、互いに反対側を向く2つの端面のうち、一方はインサート取付座3の着座面3Aに密着させられる取付面11Aとされるとともに、他方は押圧面3Bによって押圧されられる被押圧面11Bとされる。
The cutting insert I that is detachably attached to such a blade-tip-replaceable cutting tool holder is used, for example, for grooving or parting, and is made of a hard metal such as cemented carbide having a hardness higher than that of the holder body 1. A thick plate-like insert main body 11 having a substantially pentagonal shape as shown in FIGS. 11 to 13 is provided. Of the five end surfaces of the insert body 11, one of the two end surfaces facing away from each other is a mounting surface 11 </ b> A that is in close contact with the seating surface 3 </ b> A of the insert mounting seat 3, and the other is a pressing surface 3 </ b> B. The pressed surface 11B is pressed.
これら取付面11Aと被押圧面11Bとは、それぞれ着座面3Aと押圧面3Bに当接可能な断面凹V字状に形成されるとともに、インサート本体11の後端側に向かうに従い互いの間隔が僅かに広くなるように角度がつけられている。さらに、これらの取付面11Aと被押圧面11Bとの間の間隔は、上顎部2Aが弾性変形していない状態の着座面3Aと押圧面3Bとの間隔よりも僅かに大きくされている。
The mounting surface 11A and the pressed surface 11B are formed in a V-shaped cross section that can contact the seating surface 3A and the pressing surface 3B, respectively, and the distance from each other increases toward the rear end side of the insert body 11. Angled to be slightly wider. Further, the interval between the mounting surface 11A and the pressed surface 11B is slightly larger than the interval between the seating surface 3A and the pressing surface 3B in a state where the upper jaw portion 2A is not elastically deformed.
また、こうして取付面11Aを着座面3Aに着座させるとともに被押圧面11Bが押圧面3Bによって押圧されて切削インサートIがインサート取付座3に取り付けられた状態で、インサート取付部2の先端側に向けられるインサート本体11の2つの端面のうち、被押圧面11Bに連なる上顎部2A側の端面はすくい面11Cとされるとともに、取付面11Aに連なる下顎部2B側の端面は逃げ面11Dとされ、これらすくい面11Cと逃げ面11Dとの交差稜線部にはホルダ本体1の板厚よりも長い切刃12が形成されている。さらに、この取付状態において、被押圧面11Bに連なってインサート取付部2の後端側に向けられる端面はインサート取付部2の上記当接面3Cに当接させられる被当接面11Eとされる。
Further, the mounting surface 11A is seated on the seating surface 3A and the pressed surface 11B is pressed by the pressing surface 3B so that the cutting insert I is mounted on the insert mounting seat 3 toward the distal end side of the insert mounting portion 2. Of the two end surfaces of the insert body 11, the end surface on the upper jaw 2A side connected to the pressed surface 11B is a rake face 11C, and the end surface on the lower jaw 2B side connected to the mounting surface 11A is a flank 11D. A cutting edge 12 longer than the plate thickness of the holder body 1 is formed at the intersection ridge line portion between the rake face 11C and the flank face 11D. Furthermore, in this mounting state, the end surface that is continuous with the pressed surface 11B and faces the rear end side of the insert mounting portion 2 is a contacted surface 11E that is brought into contact with the abutting surface 3C of the insert mounting portion 2. .
このような切削インサートIをホルダ本体1のインサート取付座3に取り付けるための複数のレンチのうちの第1のレンチW1は、ホルダ本体1と等しい硬度、またはホルダ本体1よりも高硬度の鋼材等により形成されて、図5ないし図7に示すように円柱軸状のレンチ本体21の長手方向の先端部(図6および図7において左側の部分)に、このレンチ本体21の側部に垂直に突出するレンチ本体21より短いピン22がレンチ本体21と一体に形成されたL字状をなしている。ピン22は、その断面が、ホルダ本体1の上顎部2Aが弾性変形していない状態において上記板厚方向から見た上顎部側凹状面5Aと第1の下顎部側凹状面5Bとがなす半楕円弧の間に嵌め入れ可能な大きさの、レンチ本体21の長手方向に長軸を有する楕円状に形成されている。
The first wrench W1 among a plurality of wrenches for attaching the cutting insert I to the insert mounting seat 3 of the holder body 1 is a steel material having a hardness equal to or higher than that of the holder body 1 or the like. As shown in FIGS. 5 to 7, the longitudinal end of the cylindrical shaft wrench body 21 (the left side in FIGS. 6 and 7) is perpendicular to the side of the wrench body 21. A pin 22 that is shorter than the protruding wrench body 21 has an L-shape formed integrally with the wrench body 21. The pin 22 has a cross section formed by the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B viewed from the plate thickness direction when the upper jaw portion 2A of the holder body 1 is not elastically deformed. The wrench main body 21 is formed in an elliptical shape having a major axis in the longitudinal direction of the wrench main body 21 so as to fit between the elliptical arcs.
そして、このピン22の断面がなす楕円の長軸方向の一端部が第1のレンチW1の上顎部側摺接部22Aとされるとともに、他端部が第1のレンチW1の下顎部側摺接部22Bとされる(本実施形態では、ピン22の長軸方向のレンチ本体21側の端部が上顎部側摺接部22Aとされるとともに、これとは反対側の端部が下顎部側摺接部22Bとされている。)。なお、これら上顎部側摺接部22Aと下顎部側摺接部22Bには、ピン22の長手方向(レンチ本体21の長手方向に垂直な方向)に延びる小さな凹溝が形成されていてもよい。
One end portion of the ellipse formed by the cross section of the pin 22 in the major axis direction is the upper jaw side sliding contact portion 22A of the first wrench W1, and the other end portion is the lower jaw side sliding portion of the first wrench W1. (In this embodiment, the end of the pin 22 on the wrench body 21 side in the longitudinal direction is the upper jaw side sliding contact portion 22A, and the opposite end is the lower jaw portion. Side sliding contact portion 22B). The upper jaw side sliding contact portion 22A and the lower jaw side sliding contact portion 22B may be formed with small concave grooves extending in the longitudinal direction of the pin 22 (direction perpendicular to the longitudinal direction of the wrench main body 21). .
ただし、このような場合でも、第1のレンチW1の上顎部側摺接部22Aと下顎部側摺接部22Bとの間の上記長軸方向の間隔Aは、上顎部2Aが弾性変形していない状態での上顎部側凹状面5Aの最も凹んだ位置と第1の下顎部側凹状面5Bの最も凹んだ上記弾性変形位置との間隔Bよりも大きくされる。この第1のレンチW1の上顎部側摺接部22Aと下顎部側摺接部22Bとの間隔Aと、上顎部2Aが弾性変形していない状態での上顎部側凹状面5Aの最も凹んだ位置と第1の下顎部側凹状面5Bの第1の弾性変形位置との間隔Bの差A-Bが、本実施形態における第1の差となる。
However, even in such a case, the distance A in the major axis direction between the upper jaw side sliding contact portion 22A and the lower jaw side sliding contact portion 22B of the first wrench W1 is such that the upper jaw portion 2A is elastically deformed. The gap B between the most depressed position of the upper jaw-side concave surface 5A and the most depressed elastic deformation position of the first lower jaw-side concave surface 5B is set larger than the interval B. The distance A between the upper jaw side sliding contact portion 22A and the lower jaw side sliding contact portion 22B of the first wrench W1 and the most concave portion of the upper jaw side concave surface 5A in a state where the upper jaw portion 2A is not elastically deformed. The difference AB of the distance B between the position and the first elastic deformation position of the first lower jaw side concave surface 5B is the first difference in the present embodiment.
このような第1のレンチW1によってホルダ本体1の上顎部2Aを弾性変形させて切削インサートIを取り付けるには、まず図8ないし図10に示すように、切削インサートIを取り付けるインサート取付座3よりもホルダ本体1の先端側に延びるようにレンチ本体21を向けて、ピン22を上顎部側凹状面5Aと第1の下顎部側凹状面5Bとがなす半楕円弧の間に嵌め入れる。なお、図8ないし図10とは反対に、レンチ本体21がホルダ本体1の後端側に延びるようにしてピン22を嵌め入れてもよい。
In order to attach the cutting insert I by elastically deforming the upper jaw portion 2A of the holder body 1 with such a first wrench W1, first, as shown in FIGS. 8 to 10, the insert mounting seat 3 to which the cutting insert I is attached is used. Also, the wrench main body 21 is directed so as to extend toward the front end side of the holder main body 1, and the pin 22 is fitted between a semi-elliptical arc formed by the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B. 8 to 10, the pin 22 may be fitted so that the wrench body 21 extends to the rear end side of the holder body 1.
そして、この状態から図11ないし図13に示すように、ピン22の上顎部側摺接部22Aを上顎部側凹状面5Aに摺接させるとともに、下顎部側摺接部22Bを第1の下顎部側凹状面5Bに摺接させつつ、第1のレンチW1のレンチ本体21を第1の下顎部側凹状面5Bに沿って上向きに90°回転させて、上顎部側摺接部22Aが上顎部側凹状面5Aの最も凹んだ位置に、また下顎部側摺接部22Bが第1の下顎部側凹状面5Bの第1の弾性変形位置に配置されるように、第1のレンチW1を案内して位置決めする。なお、これとは逆にレンチ本体21を下向きに90°回転させてもよく、この場合には上顎部側摺接部22Aと下顎部側摺接部22Bも逆になる。
From this state, as shown in FIGS. 11 to 13, the upper jaw side sliding contact portion 22A of the pin 22 is brought into sliding contact with the upper jaw side concave surface 5A, and the lower jaw side sliding contact portion 22B is moved to the first lower jaw. The wrench main body 21 of the first wrench W1 is rotated 90 ° upward along the first lower jaw side concave surface 5B while being brought into sliding contact with the lower side concave surface 5B, so that the upper jaw side sliding contact portion 22A becomes the upper jaw. The first wrench W1 is placed in the most concave position of the part-side concave surface 5A, and so that the lower jaw part-side sliding contact part 22B is arranged at the first elastic deformation position of the first lower jaw part-side concave surface 5B. Guide and position. In contrast, the wrench body 21 may be rotated 90 ° downward. In this case, the upper jaw side sliding contact portion 22A and the lower jaw side sliding contact portion 22B are also reversed.
このとき、上述のように第1のレンチW1の上顎部側摺接部22Aと下顎部側摺接部22Bとの間隔Aは、上顎部2Aが弾性変形していない状態での上顎部側凹状面5Aの最も凹んだ位置と第1の下顎部側凹状面5Bの弾性変形位置との間隔Bよりも大きいので、その上記第1の差A-Bの分だけ上顎部2Aは下顎部2Bに対して離間する方向に弾性変形させられて持ち上げられ、上顎部2Aの押圧面3Bと下顎部2Bの着座面3Aとの間隔が大きくなるようにインサート取付座3が押し拡げられる。そこで、図14に示すように、この押し拡げられたインサート取付座3に切削インサートIを挿入し、取付面11Aを着座面3Aに密着させるとともに被当接面11Eを当接面3Cに当接させ、切削インサートIをインサート取付座3に着座させる。
At this time, as described above, the distance A between the upper jaw side sliding contact portion 22A and the lower jaw side sliding contact portion 22B of the first wrench W1 is the upper jaw side concave shape in a state where the upper jaw portion 2A is not elastically deformed. Since the distance B between the most concave position of the surface 5A and the elastic deformation position of the first lower jaw side concave surface 5B is larger, the upper jaw portion 2A becomes the lower jaw portion 2B by the first difference AB. The insert mounting seat 3 is expanded so that the gap between the pressing surface 3B of the upper jaw portion 2A and the seating surface 3A of the lower jaw portion 2B is increased. Therefore, as shown in FIG. 14, the cutting insert I is inserted into the expanded insert mounting seat 3 to bring the mounting surface 11A into close contact with the seating surface 3A, and the contacted surface 11E contacts the contact surface 3C. Then, the cutting insert I is seated on the insert mounting seat 3.
次いで、図15に示すように、上顎部2Aを弾性変形させた方向とは反対の方向に第1のレンチW1を回転させると、切削インサートIの取付面11Aと被押圧面11Bとの間隔は、上顎部2Aが弾性変形していない状態のインサート取付座3の着座面3Aと押圧面3Bとの間隔よりも僅かに大きくされているので、切削インサートIは被押圧面11Bが押圧面3Bによって押圧されて、図16に示すように弾性変形したままの上顎部2Aと下顎部2Bとの間に挟み込まれてインサート取付座3に取り付けられる。
Next, as shown in FIG. 15, when the first wrench W1 is rotated in the direction opposite to the direction in which the upper jaw 2A is elastically deformed, the distance between the mounting surface 11A of the cutting insert I and the pressed surface 11B is as follows. Since the distance between the seating surface 3A and the pressing surface 3B of the insert mounting seat 3 in a state where the upper jaw portion 2A is not elastically deformed, the pressed surface 11B of the cutting insert I is pressed by the pressing surface 3B. As shown in FIG. 16, it is pressed and sandwiched between the upper jaw 2A and the lower jaw 2B while being elastically deformed, and is attached to the insert mounting seat 3.
このように切削インサートIがインサート取付座3に取り付けられたホルダ本体1は、工作機械の刃物台に取り付けられ、切削インサートIの切刃12が回転する被削材に切り込まれて被削材の溝入れ加工や突っ切り加工等の旋削加工を行う。また、このように旋削加工を行ううちに切削インサートIの切刃12が摩耗して寿命に達したときは、上記と同様の手順で第1のレンチW1によってホルダ本体1の上顎部2Aを弾性変形させて切刃12が摩耗した切削インサートIを取り外し、新規の切削インサートIと交換して旋削加工を続行する。
In this way, the holder body 1 with the cutting insert I attached to the insert mounting seat 3 is attached to the tool rest of the machine tool, and the cutting blade 12 of the cutting insert I is cut into the rotating work material to be cut. Turning such as grooving and parting off. Further, when the cutting edge 12 of the cutting insert I is worn and reaches the end of its life during the turning process, the upper jaw 2A of the holder body 1 is elastically moved by the first wrench W1 in the same procedure as described above. The cutting insert I which has been deformed and the cutting blade 12 is worn is removed and replaced with a new cutting insert I to continue the turning process.
こうして切削インサートIを交換する作業を繰り返すことにより、第1のレンチW1のピン22との摺接によって上顎部側凹状面5Aと第1の下顎部側凹状面5Bには摩滅が生じる。そして、この摩滅により、第1のレンチW1の上顎部側摺接部22Aと下顎部側摺接部22Bとの間隔Aと、上顎部2Aが弾性変形していない状態での上顎部側凹状面5Aの最も凹んだ位置と第1の下顎部側凹状面5Bの弾性変形位置との間隔Bとが等しくなって上記第1の差A-Bが0になると、第1のレンチW1を回転させても上顎部2Aは弾性変形しなくなり、切削インサートIを着脱することができなくなってしまう。
Thus, by repeating the operation of exchanging the cutting insert I, the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B are worn by sliding contact with the pin 22 of the first wrench W1. Due to this wear, the gap A between the upper jaw side sliding contact portion 22A and the lower jaw side sliding contact portion 22B of the first wrench W1 and the upper jaw side concave surface in a state where the upper jaw portion 2A is not elastically deformed. When the distance B between the most recessed position of 5A and the elastic deformation position of the first lower jaw side concave surface 5B becomes equal and the first difference AB becomes 0, the first wrench W1 is rotated. However, the upper jaw 2A is not elastically deformed, and the cutting insert I cannot be attached or detached.
そこで、このように第1のレンチW1によって上顎部2Aを弾性変形させられなくなった場合には、図17ないし図19に示す複数のレンチのうちの第2のレンチW2を用いることによって上顎部2Aを弾性変形させる。この第2のレンチW2は、第1のレンチW1と同様にホルダ本体1と等しい硬度、またはホルダ本体1よりも高硬度の鋼材等により形成されて、円柱軸状のレンチ本体31の長手方向の先端部(図18および図19において左側の部分)に、このレンチ本体31の側部に垂直に突出するレンチ本体31より短い等しい長さの2つのピン32、33が間隔をあけて互いに平行にレンチ本体31と一体に形成された概略F字状をなしている。
Therefore, when the upper jaw 2A cannot be elastically deformed by the first wrench W1, the upper jaw 2A is used by using the second wrench W2 of the plurality of wrench shown in FIGS. Is elastically deformed. The second wrench W2 is formed of a steel material or the like having a hardness equal to or higher than that of the holder body 1 in the same manner as the first wrench W1, and is formed in the longitudinal direction of the cylindrical shaft-shaped wrench body 31. Two pins 32 and 33 of equal length shorter than the wrench main body 31 projecting perpendicularly to the side of the wrench main body 31 are parallel to each other at the tip (the left portion in FIGS. 18 and 19). A substantially F-shape formed integrally with the wrench body 31 is formed.
これらのピン32、33は、本実施形態では、その断面が互いに等しい直径の円形とされており、このピン32、33の直径は、上顎部側凹状面5Aと第1の下顎部側凹状面5Bの最も凹んだ位置同士の間隔と弧状溝6の溝幅よりも小さくされている。また、ピン32、33同士の間隔は、これらのピン32、33の一方を上顎部側凹状面5Aと第1の下顎部側凹状面5Bの間に挿入した状態で、他方がホルダ本体1後端側の弧状溝6の後端部に挿入可能な大きさとされている。
In the present embodiment, these pins 32 and 33 are circular in cross section, and the diameters of the pins 32 and 33 are the upper jaw side concave surface 5A and the first lower jaw side concave surface. The distance between the most recessed positions of 5B and the groove width of the arc-shaped groove 6 are made smaller. The interval between the pins 32 and 33 is such that one of these pins 32 and 33 is inserted between the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B, and the other is located behind the holder body 1. The size is such that it can be inserted into the rear end of the arcuate groove 6 on the end side.
そして、これらのピン32、33の外周面のうちレンチ本体31の長手方向に背を向けて互いに反対側を向く、レンチ本体21の長手方向先端側に位置するピン32、33のうちの一方の外周面の先端側縁部と、後端側に位置するピン32、33の他方の外周面の後端側縁部とが、この第2のレンチW2の上顎部側摺接部と下顎部側摺接部とされる(本実施形態では、レンチ本体31の長手方向後端側に位置する第1のピン32の外周面の後端側縁部が第2のレンチW2の上顎部側摺接部32Aとされるとともに、これとは反対側の先端側に位置する第2のピン33の外周面の先端側縁部が第2のレンチW2の下顎部側摺接部33Aとされている。)。
One of the pins 32 and 33 located on the front end side in the longitudinal direction of the wrench main body 21 and facing the opposite sides with the back in the longitudinal direction of the wrench main body 31 out of the outer peripheral surfaces of these pins 32 and 33. The front end side edge portion of the outer peripheral surface and the rear end side edge portion of the other outer peripheral surface of the pins 32, 33 located on the rear end side are the upper jaw side sliding contact portion and lower jaw portion side of the second wrench W2. (In this embodiment, the rear end side edge portion of the outer peripheral surface of the first pin 32 located on the rear end side in the longitudinal direction of the wrench body 31 is the upper slidable side contact portion of the second wrench W2. In addition to the portion 32A, the distal end side edge portion of the outer peripheral surface of the second pin 33 located on the distal end side opposite to this is the lower jaw side sliding contact portion 33A of the second wrench W2. ).
さらに、レンチ本体31の長手方向における第2のレンチW2の上顎部側摺接部32Aと下顎部側摺接部33Aとの間の間隔Cは、上顎部2Aが弾性変形していない状態での上顎部側凹状面5Aの最も凹んだ位置と弧状溝6の第2の下顎部側凹状面6A先端の第2の弾性変形位置との間隔Dよりも大きくされている。この第2のレンチW2の上顎部側摺接部32Aと下顎部側摺接部33Aとの間隔Cと、上顎部2Aが弾性変形していない状態での上顎部側凹状面5Aの最も凹んだ位置と第2の下顎部側凹状面6Aの第2の弾性変形位置との間隔Dの差C-Dが本実施形態における第2の差となる。
Further, the distance C between the upper jaw side sliding contact portion 32A and the lower jaw side sliding contact portion 33A of the second wrench W2 in the longitudinal direction of the wrench main body 31 is a state in which the upper jaw portion 2A is not elastically deformed. The distance D between the most concave position of the upper jaw side concave surface 5A and the second elastic deformation position of the tip of the second lower jaw side concave surface 6A of the arc-shaped groove 6 is made larger. The distance C between the upper jaw side sliding contact portion 32A and the lower jaw side sliding contact portion 33A of the second wrench W2 and the most concave portion of the upper jaw side concave surface 5A in a state where the upper jaw portion 2A is not elastically deformed. The difference C−D in the distance D between the position and the second elastic deformation position of the second lower jaw side concave surface 6A is the second difference in the present embodiment.
そして、この第2の差C-Dは上記第1の差A-Bよりも大きくされている。さらに、本実施形態では、この第2の差C-Dは、第1の差A-Bに対して、上顎部2Aが弾性変形していない状態での上顎部側凹状面5Aの最も凹んだ位置が摩滅によって後退したときの後退量よりも大きくされており、例えば第1のレンチW1による摩滅によって上顎部側凹状面5Aと第1の下顎部側凹状面5Bが均等に摩滅した場合には、(A-B)+(A-B)/2=1.5×(A-B)よりも大きくされている。
The second difference CD is larger than the first difference AB. Further, in the present embodiment, the second difference CD is the most concave of the upper jaw side concave surface 5A in a state where the upper jaw 2A is not elastically deformed with respect to the first difference AB. For example, when the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B are evenly worn due to wear by the first wrench W1, for example, when the position is set back by wear. , (AB) + (AB) /2=1.5× (AB).
このような第2のレンチW2によって、上顎部側凹状面5Aが摩滅した上顎部2Aを弾性変形させて持ち上げるには、まず図20ないし図22に示すように第2のレンチW2の第1のピン32を上顎部側凹状面5Aと第1の下顎部側凹状面5Bの間に挿入するとともに、第2のピン33を弧状溝6のホルダ本体1後端部に挿入する。次に、この状態から、図23ないし図25に示すように、第1のピン32の上顎部側摺接部32Aを上顎部側凹状面5Aに摺接させるとともに、第2のピン33の下顎部側摺接部33Aを第2の下顎部側凹状面6Aに摺接させつつ、第2のレンチW2のレンチ本体31を回転させて、下顎部側摺接部33Aが弧状溝6の先端における第2の下顎部側凹状面6Aの第2の弾性変形位置に配置されるように、第2のレンチW2を案内して位置決めする。
In order to elastically deform and lift the upper jaw 2A with the upper concave portion 5A worn by the second wrench W2, the first wrench W2 of the second wrench W2 is first lifted as shown in FIGS. The pin 32 is inserted between the upper jaw side concave surface 5 </ b> A and the first lower jaw side concave surface 5 </ b> B, and the second pin 33 is inserted into the rear end portion of the holder body 1 of the arc-shaped groove 6. Next, from this state, as shown in FIGS. 23 to 25, the upper jaw side sliding contact portion 32A of the first pin 32 is brought into sliding contact with the upper jaw side concave surface 5A, and the lower jaw of the second pin 33 is placed. Rotating the wrench body 31 of the second wrench W2 while sliding the portion side sliding contact portion 33A against the second lower jaw side concave surface 6A, the lower jaw portion side sliding contact portion 33A is at the tip of the arc-shaped groove 6 The second wrench W2 is guided and positioned so as to be arranged at the second elastic deformation position of the second lower jaw side concave surface 6A.
なお、これとは逆に、第2のレンチW2の第2のピン33を上顎部側凹状面5Aと第1の下顎部側凹状面5Bの間に挿入するとともに、第1のピン32を弧状溝6のホルダ本体1後端部に挿入し、第2のピン33を上顎部側凹状面5Aに摺接させるとともに、第1のピン32を第2の下顎部側凹状面6Aに摺接させつつ第2のレンチW2を回転させて、第1のピン32が弧状溝6の先端における第2の下顎部側凹状面6Aの第2の弾性変形位置に配置されるように、第2のレンチW2を案内してもよい。この場合には、第2のレンチW2の上顎部側摺接部32Aと下顎部側摺接部33Aも逆になる。
On the contrary, the second pin 33 of the second wrench W2 is inserted between the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B, and the first pin 32 is arcuate. The groove 6 is inserted into the rear end of the holder body 1 so that the second pin 33 is brought into sliding contact with the upper jaw side concave surface 5A and the first pin 32 is brought into sliding contact with the second lower jaw side concave surface 6A. While rotating the second wrench W2, the second wrench is arranged such that the first pin 32 is disposed at the second elastic deformation position of the second lower jaw side concave surface 6A at the tip of the arcuate groove 6. W2 may be guided. In this case, the upper jaw side sliding contact portion 32A and the lower jaw side sliding contact portion 33A of the second wrench W2 are also reversed.
上述の通り、図23ないし図25に示すように第2のレンチW2を回転させると、弧状溝6の上顎部側凹状面5Aに対向する内面は第2の下顎部側凹状面6Aとされていて、この第2の下顎部側凹状面6Aと、上顎部側凹状面5Aが最も凹んだ位置との間隔は、弧状溝6の後端から先端側に向かうに従い漸次小さくなるように形成されており、この弧状溝6の先端の位置である第2の弾性変形位置と上顎部側凹状面5Aの最も凹んだ位置との間隔Dに対して、第2のレンチW2の上顎部側摺接部32Aと下顎部側摺接部33Aとの間の間隔Cが大きく、しかもその差である第2の差C-Dは第1の差A-Bよりも大きいので、第2のレンチW2の下顎部側摺接部33Aが第2の下顎部側凹状面6Aと摺接して上顎部2Aが再び弾性変形可能となって持ち上げられ、下顎部側摺接部33Aが第2の弾性変形位置に達したところで第2のレンチW2は位置決めされ、インサート取付座3の着座面3Aと押圧面3Bとの間隔が拡げられる。
As described above, when the second wrench W2 is rotated as shown in FIGS. 23 to 25, the inner surface facing the upper jaw side concave surface 5A of the arc-shaped groove 6 is the second lower jaw side concave surface 6A. The interval between the second lower jaw side concave surface 6A and the position where the upper jaw side concave surface 5A is most recessed is formed so as to gradually decrease from the rear end of the arc-shaped groove 6 toward the front end side. And the upper jaw side sliding contact portion of the second wrench W2 with respect to the distance D between the second elastic deformation position which is the position of the tip of the arc-shaped groove 6 and the most depressed position of the upper jaw side concave surface 5A. Since the distance C between 32A and the lower jaw side sliding contact portion 33A is large and the second difference CD which is the difference is larger than the first difference AB, the lower jaw of the second wrench W2 The part side sliding contact part 33A is in sliding contact with the second lower jaw part side concave surface 6A and the upper jaw part 2A can be elastically deformed again. When the lower jaw side sliding contact portion 33A reaches the second elastic deformation position, the second wrench W2 is positioned, and the interval between the seating surface 3A of the insert mounting seat 3 and the pressing surface 3B is increased. .
そこで、図26に示すように、こうして再び押し拡げられたインサート取付座3に新規の切削インサートIを着座させた後、第2のレンチW2の第2のピン33が弧状溝6の後端部に位置するように、上顎部2Aを弾性変形させた方向とは逆方向にレンチ本体31を回転することにより、図27に示すように新規の切削インサートIは被押圧面11Bが押圧面3Bに押圧されてインサート取付座3に取り付けられる。従って、この状態から第2のレンチを取り外して再び新規の切削インサートIにより被削材の旋削加工を行うことができるとともに、第2のレンチW2によって切削インサートIの着脱操作を続行することが可能となる。
26, after the new cutting insert I is seated on the insert mounting seat 3 thus expanded again, the second pin 33 of the second wrench W2 is connected to the rear end portion of the arc-shaped groove 6. 27, by rotating the wrench main body 31 in the direction opposite to the direction in which the upper jaw portion 2A is elastically deformed, the new cutting insert I has a pressed surface 11B as a pressing surface 3B as shown in FIG. It is pressed and attached to the insert mounting seat 3. Therefore, it is possible to remove the second wrench from this state and turn the work material again with the new cutting insert I, and to continue the attaching / detaching operation of the cutting insert I with the second wrench W2. It becomes.
このように、上記構成の刃先交換式バイト用ホルダ、および刃先交換式バイト用ホルダとレンチのセットによれば、複数のレンチのうちの第1のレンチW1による切削インサートIの着脱操作によってホルダ本体1の上顎部側凹状面5Aと第1の下顎部側凹状面5Bに摩滅が生じて、第1のレンチW1によっては切削インサートIの着脱が不可能になっても、ホルダ本体1を廃棄することなく複数のレンチのうちの第2のレンチW2によって新規の切削インサートIの着脱操作を続行することができる。このため、ホルダ本体1の有効利用を図ることができて長期に亙って使用することが可能となり、効率的かつ経済的である。
As described above, according to the blade tip replaceable tool holder and the set of the blade replaceable tool holder and the wrench configured as described above, the holder main body can be removed by attaching and detaching the cutting insert I with the first wrench W1 among the plurality of wrench. Even if the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B are worn and the cutting insert I cannot be attached or detached by the first wrench W1, the holder body 1 is discarded. Without this, the attaching / detaching operation of the new cutting insert I can be continued by the second wrench W2 of the plurality of wrench. For this reason, the holder body 1 can be used effectively and can be used for a long time, which is efficient and economical.
なお、本実施形態では、上述のように第2の差C-Dが第1の差A-Bに対して1.5×(A-B)よりも大きくされていて、第1のレンチW1の上顎部側摺接部22Aと下顎部側摺接部22Bとの間隔Aが、上顎部2Aが弾性変形していない状態での上顎部側凹状面5Aの最も凹んだ位置と第1の下顎部側凹状面5Bの弾性変形位置との間隔Bと等しくなるまで摩滅したところで、第2のレンチW2を用いるようにしているが、第2の差C-Dが第1の差A-Bに対してこれよりも小さくて、第1のレンチW1によって上顎部側凹状面5Aと第1の下顎部側凹状面5Bがある程度摩滅して切削インサートIを着脱し難くなったところで第2のレンチW2を用いるようにしてもよい。なお、第1の差A-Bと第2の差C-Dは、A-B=C-Dであってもよい。
In the present embodiment, as described above, the second difference CD is larger than 1.5 × (AB) with respect to the first difference AB, and the first wrench W1. The distance A between the upper jaw side sliding contact portion 22A and the lower jaw side sliding contact portion 22B is such that the most depressed position of the upper jaw side concave surface 5A and the first lower jaw in a state where the upper jaw portion 2A is not elastically deformed. The second wrench W2 is used when it is worn until it becomes equal to the distance B from the elastic deformation position of the part-side concave surface 5B, but the second difference CD is changed to the first difference AB. On the other hand, when the first wrench W1 is smaller than this, the upper chin side concave surface 5A and the first lower chin side concave surface 5B are worn to some extent and the cutting insert I becomes difficult to attach and detach. May be used. The first difference AB and the second difference CD may be AB = CD.
また、本実施形態の刃先交換式バイト用ホルダでは、上顎部側凹状面5Aがホルダ本体1の板厚方向から見て、スリット4が延びる方向に長軸を有する半楕円弧状をなして上顎部側内側面4Aから凹むように形成されている。また、この上顎部側凹状面5Aに対向して第1の弾性変形位置を形成する第1の下顎部側凹状面5Bも、スリット4が延びる方向に長軸を有する半楕円弧状をなして下顎部側内側面4Bから凹むように形成されているので、レンチ本体21に特許文献4に記載されたような断面長円状あるいは断面楕円状のピン22を有する第1のレンチW1を用いてインサート取付座3を押し拡げることができ、ピン22が1つで済むので一層効率的である。
Further, in the blade tip replaceable cutting tool holder of the present embodiment, the upper jaw side concave surface 5A has a semi-elliptical arc shape having a major axis in the direction in which the slit 4 extends when viewed from the plate thickness direction of the holder body 1. It is formed so as to be recessed from the side inner side surface 4A. In addition, the first lower jaw side concave surface 5B that forms the first elastic deformation position facing the upper jaw side concave surface 5A also forms a semi-elliptical arc shape having a long axis in the direction in which the slit 4 extends. Since it is formed so as to be recessed from the inner side surface 4B, the wrench body 21 is inserted using the first wrench W1 having a pin 22 having an elliptical or elliptical cross section as described in Patent Document 4. Since the mounting seat 3 can be expanded and only one pin 22 is required, it is more efficient.
さらに、本実施形態では、第2のレンチW2の下顎部側摺接部33Aが摺接する第2の下顎部側凹状面6Aは、スリット4から離れて下顎部2Bに形成された弧状溝6に形成されている。すなわち、第1のレンチW1が摺接する第1の下顎部側凹状面5Bとは異なる位置に第2の下顎部側凹状面6Aが形成されるので、ホルダ本体1の摩滅を一層抑制することができ、さらに長寿命な刃先交換式バイト用ホルダを提供することが可能となる。なお、このようにスリット4から離れた弧状溝6に第2の下顎部側凹状面6Aを形成して切削インサートIの着脱を行う場合に、本発明の刃先交換式バイト用ホルダとレンチのセットにおいては、上顎部側凹状面5Aは、例えば特許文献1に記載されているように上顎部2Aに形成された円筒状の孔の下顎部2B側を向く内面であってもよく、また特許文献3に記載されているように上顎部側内側面4Aから円弧状に凹むものでもよい。
Furthermore, in the present embodiment, the second lower jaw side concave surface 6A with which the lower jaw side sliding contact portion 33A of the second wrench W2 is in sliding contact is formed in the arc-shaped groove 6 formed in the lower jaw portion 2B away from the slit 4. Is formed. That is, since the second lower jaw side concave surface 6A is formed at a position different from the first lower jaw side concave surface 5B with which the first wrench W1 is in sliding contact, the wear of the holder body 1 is further suppressed. In addition, it is possible to provide a blade holder with a replaceable cutting edge that has a longer life. When the second lower jaw side concave surface 6A is formed in the arc-shaped groove 6 away from the slit 4 and the cutting insert I is attached / detached in this way, the set of the blade edge replaceable bite holder and wrench of the present invention is set. The upper jaw side concave surface 5A may be an inner surface facing the lower jaw portion 2B side of the cylindrical hole formed in the upper jaw portion 2A as described in Patent Document 1, for example. 3 may be recessed in an arc shape from the upper jaw side inner side surface 4A.
一方、上記第1の実施形態においては、上顎部側凹状面5Aと第1の下顎部側凹状面5Bはスリット4を間にして対向する上顎部側内側面4Aと下顎部側内側面4Bに形成されているが、図28ないし図30に刃先交換式バイト用ホルダを示す本発明の第2の実施形態のように、第1の下顎部側凹状面7Aと第2の下顎部側凹状面8Aが、上記スリット4から離れるとともに、互いにも離れて下顎部2Bに形成された第1の弧状溝7と第2の弧状溝8にそれぞれ形成されていてもよい。なお、この第2の実施形態において、第1の実施形態と共通する部分には同一の符号を配してある。
On the other hand, in the first embodiment, the upper jaw side concave surface 5A and the first lower jaw side concave surface 5B are opposed to the upper jaw side inner side surface 4A and the lower jaw side inner side surface 4B facing each other with the slit 4 therebetween. 28A to 30B, the first lower jaw side concave surface 7A and the second lower jaw side concave surface as in the second embodiment of the present invention showing the blade-tip-exchangeable tool holder in FIGS. 8A may be formed in the first arcuate groove 7 and the second arcuate groove 8 formed in the lower jaw portion 2B apart from the slit 4 and also from each other. In the second embodiment, the same reference numerals are assigned to portions common to the first embodiment.
この第2の実施形態においては、第1の弧状溝7は下顎部2Bのインサート取付座3側に形成されるとともに、第2の弧状溝8は第1の弧状溝7とはインサート取付座3とは反対側に離れて下顎部2Bに形成され、ともに上顎部側凹状面5Aの最も凹んだ位置を中心とする略同心円弧状に形成されている。ただし、この上顎部側凹状面5Aの最も凹んだ位置を向く第1の下顎部側凹状面7Aと第2の下顎部側凹状面8Aとは、上顎部側凹状面5Aの最も凹んだ位置との間隔がホルダ本体1の先端側に向かうに従い漸次小さくなるように形成されていて、ホルダ本体1の先端部の位置において上顎部側凹状面5Aの最も凹んだ位置との間隔B、Dが最も小さくなり、第1、第2の弾性変形位置となる。また、上顎部側凹状面5Aは上顎部側内側面4Aから凹む略半円弧形状であり、下顎部側内側面4Bには第1の下顎部側凹状面5Bは形成されていない。
In the second embodiment, the first arcuate groove 7 is formed on the insert mounting seat 3 side of the lower jaw 2B, and the second arcuate groove 8 is different from the first arcuate groove 7 in the insert mounting seat 3. Are formed on the lower jaw 2B apart from each other, and both are formed in a substantially concentric arc shape centering on the most recessed position of the upper jaw-side concave surface 5A. However, the first lower jaw side concave surface 7A and the second lower jaw side concave surface 8A facing the most concave position of the upper jaw side concave surface 5A are the most concave positions of the upper jaw side concave surface 5A. Is formed so as to gradually decrease toward the distal end side of the holder main body 1, and the distances B and D between the concave portion 5 </ b> A of the upper jaw side concave surface at the position of the distal end portion of the holder main body 1 are the largest. It becomes smaller and becomes the first and second elastic deformation positions. The upper jaw side concave surface 5A has a substantially semicircular arc shape recessed from the upper jaw side inner side surface 4A, and the first lower jaw side concave surface 5B is not formed on the lower jaw side inner side surface 4B.
このような第2の実施形態の上顎部2Aを弾性変形させる第1、第2のレンチは、図示は略するが図17ないし図19に示した第1の実施形態の第2のレンチW2と同様の形状とされており、その第1、第2のピンの大きさと間隔は、第1のピンと第2のピンの一方を上顎部側凹状面5Aに嵌め入れた状態で、他方が、第1のレンチでは第1の弧状溝7の後端部に、第2のレンチでは第2の弧状溝8の後端部に挿入可能とされている。そして、これら第1、第2のレンチの上顎部側摺接部と下顎部側摺接部との間隔A、Cは、ホルダ本体1の上顎部側凹状面5Aの最も凹んだ位置と第1、第2の下顎部側凹状面7A、8Aにおける上記第1、第2の弾性変形位置との間隔B、Dよりも大きく、しかも第1の差A-Bよりも第2の差C-Dが大きくなるように設定されている。
The first and second wrench for elastically deforming the upper jaw portion 2A of the second embodiment as described above are not shown, but the second wrench W2 of the first embodiment shown in FIGS. The size and interval of the first and second pins are such that one of the first pin and the second pin is fitted into the upper jaw side concave surface 5A, and the other is the first and second pins. The first wrench can be inserted into the rear end of the first arcuate groove 7, and the second wrench can be inserted into the rear end of the second arcuate groove 8. The distances A and C between the upper jaw side sliding contact portion and the lower jaw side sliding contact portion of the first and second wrench are the same as the most recessed position of the upper jaw side concave surface 5A of the holder body 1. The second lower jaw side concave surfaces 7A and 8A are larger than the distances B and D from the first and second elastic deformation positions, and the second difference CD is greater than the first difference AB. Is set to be large.
このような第2の実施形態においても、まず第1のレンチを用いて、第1の実施形態の第2のレンチW2による切削インサートIの着脱操作と同様の操作で、第1の弧状溝7の第1の下顎部側凹状面7Aを用いて切削インサートの着脱を行う。そして、この第1のレンチによる着脱操作によって上顎部側凹状面5Aや第1の下顎部側凹状面7Aが摩滅し、切削インサートの着脱が不可能または困難となった場合には、第2のレンチを使用して第2の弧状溝8の第2の下顎部側凹状面8Aを用いることにより、再び上顎部2Aを弾性変形させて切削インサートの着脱操作を行うことができるので、第1の実施形態と同様に効率的かつ経済的である。
Also in the second embodiment, the first arcuate groove 7 is first obtained by using the first wrench and the same operation as the attachment / detachment operation of the cutting insert I by the second wrench W2 of the first embodiment. The cutting insert is attached and detached using the first lower jaw side concave surface 7A. Then, when the upper jaw side concave surface 5A and the first lower jaw side concave surface 7A are worn away by the attaching / detaching operation by the first wrench, it becomes impossible or difficult to attach or detach the cutting insert. By using the second lower jaw side concave surface 8A of the second arcuate groove 8 using a wrench, the upper jaw 2A can be elastically deformed again and the cutting insert can be attached / detached. As efficient as the embodiment, it is economical.
また、本実施形態では、上顎部2Aに形成される上顎部側凹状面5Aが半円弧形状であるので、その最も凹んだ位置における曲率半径と上顎部側内側面4Aからの深さが第1の実施形態のような半楕円弧形状の上顎部側凹状面5Aと同じであれば、上顎部2Aが上顎部側凹状面5Aによって切り欠かれる部分を極力少なくすることができる。このため、上顎部2Aの剛性が低下するのを抑えることができ、切削インサートIを十分な弾性力で押圧してインサート取付部2に取り付けて安定した旋削加工を行うことが可能となる。
In the present embodiment, the upper jaw side concave surface 5A formed on the upper jaw 2A has a semicircular arc shape. Therefore, the radius of curvature at the most concave position and the depth from the upper jaw side inner side surface 4A are the first. If it is the same as the upper ellipse side concave surface 5A of the semi-elliptical arc shape as in the embodiment, the portion where the upper jaw portion 2A is notched by the upper jaw side concave surface 5A can be reduced as much as possible. For this reason, it can suppress that the rigidity of 2 A of upper jaws falls, and it becomes possible to press the cutting insert I with sufficient elastic force, and to attach to the insert attaching part 2, and to perform stable turning.
ただし、これとは逆に上顎部2Aが切り欠かれる部分は大きくなるが、本実施形態のように第1、第2の弧状溝7、8に第1、第2の下顎部側凹状面7A、8Aを形成して上顎部2Aを弾性変形させる場合には、上述したように上顎部2Aに円筒状等の孔を形成し、この孔の下顎部2B側を向く内面を上顎部側凹状面5Aとしてもよい。また、下顎部に3つ以上の弧状溝を形成してそれぞれに下顎部側凹状面を形成し、3つ以上のレンチの上顎部側摺接部と下顎部側摺接部との間隔と、各下顎部側凹状面の弾性変形位置と上顎部側凹状面との間隔との差が段階的に大きくなるようにしたり、あるいは第1の実施形態と同様に半楕円形状の上顎部側凹状面と下顎部側凹状面を形成し、その第1の実施形態における第1の差A-Bを、第2の実施形態において第1の差A-Bおよび第2の差C-Dと異なる大きさとしたりすることにより、レンチを交換して切削インサートの着脱操作を3回以上続行することも可能である。
However, on the contrary, the portion where the upper jaw 2A is cut out becomes larger, but the first and second lower jaw side concave surfaces 7A are formed in the first and second arc-shaped grooves 7 and 8 as in the present embodiment. When the upper jaw 2A is elastically deformed by forming 8A, a cylindrical hole or the like is formed in the upper jaw 2A as described above, and the inner surface facing the lower jaw 2B side of this hole is the upper jaw side concave surface It may be 5A. Further, three or more arc-shaped grooves are formed in the lower jaw part to form a lower jaw part side concave surface, respectively, and an interval between the upper jaw part side sliding contact part and the lower jaw part side sliding contact part of three or more wrenches, The difference between the elastic deformation position of each lower jaw side concave surface and the distance between the upper jaw side concave surface is increased stepwise, or the upper jaw side concave surface is semi-elliptical like the first embodiment. And the lower jaw side concave surface, and the first difference AB in the first embodiment is different from the first difference AB and the second difference CD in the second embodiment. By doing so, it is also possible to replace the wrench and continue the attaching / detaching operation of the cutting insert three or more times.
1 ホルダ本体
2 インサート取付部
2A 上顎部
2B 下顎部
3 インサート取付座
3A 着座面
3B 押圧面
4 スリット
4A 上顎部側内側面
4B 下顎部側内側面
5A 上顎部側凹状面
5B、7A 第1の下顎部側凹状面
6、7、8 弧状溝
6A、8A 第2の下顎部側凹状面
11 インサート本体
11A インサート本体11の取付面
11B インサート本体11の被押圧面
12 切刃
21、31 レンチ本体
22、32、33 ピン
22A、32A 上顎部側摺接部
22B、33A 下顎部側摺接部
W1、W2 レンチ
P1、P2 ピン
I 切削インサート
A 第1のレンチW1の上顎部側摺接部22Aと下顎部側摺接部22Bとの間隔
B 上顎部2Aが弾性変形していない状態における上顎部側凹状面5Aの最も凹んだ位置と第1の下顎部側凹状面5B、7Aの第1の弾性変形位置との間隔
C 第2のレンチW2の上顎部側摺接部32Aと下顎部側摺接部33Aとの間隔
D 上顎部2Aが弾性変形していない状態における上顎部側凹状面5Aの最も凹んだ位置と第2の下顎部側凹状面6A、8Aの第2の弾性変形位置との間隔 DESCRIPTION OF SYMBOLS 1 Holder main body 2 Insert mounting part 2A Upper jaw part 2B Lower jaw part 3 Insert mounting seat 3A Seating surface 3B Press surface 4 Slit 4A Upper jaw side inner surface 4B Lower jaw side inner surface 5A Upper jaw side concave surface 5B, 7A First lower jaw Part-side concave surface 6, 7, 8 Arc-shaped groove 6A, 8A Second lower jaw side-side concave surface 11 Insert body 11A Mounting surface of insert body 11 11B Pressed surface of insert body 11 12 Cutting blade 21, 31 Wrench body 22, 32, 33 Pins 22A, 32A Upper jaw side sliding contact portion 22B, 33A Lower jaw side sliding contact portion W1, W2 Wrench P1, P2 Pin I Cutting insert A Upper jaw side sliding contact portion 22A and lower jaw portion of the first wrench W1 Distance between the side sliding contact portion 22B B The most depressed position of the upper jaw side concave surface 5A and the first lower jaw side concave shape in a state where the upper jaw portion 2A is not elastically deformed Interval between first elastic deformation position of 5B and 7A C Interval between upper jaw side sliding contact portion 32A and lower jaw side sliding contact portion 33A of second wrench W2 D In state where upper jaw portion 2A is not elastically deformed The distance between the most depressed position of the upper jaw side concave surface 5A and the second elastic deformation position of the second lower jaw side concave surfaces 6A, 8A
2 インサート取付部
2A 上顎部
2B 下顎部
3 インサート取付座
3A 着座面
3B 押圧面
4 スリット
4A 上顎部側内側面
4B 下顎部側内側面
5A 上顎部側凹状面
5B、7A 第1の下顎部側凹状面
6、7、8 弧状溝
6A、8A 第2の下顎部側凹状面
11 インサート本体
11A インサート本体11の取付面
11B インサート本体11の被押圧面
12 切刃
21、31 レンチ本体
22、32、33 ピン
22A、32A 上顎部側摺接部
22B、33A 下顎部側摺接部
W1、W2 レンチ
P1、P2 ピン
I 切削インサート
A 第1のレンチW1の上顎部側摺接部22Aと下顎部側摺接部22Bとの間隔
B 上顎部2Aが弾性変形していない状態における上顎部側凹状面5Aの最も凹んだ位置と第1の下顎部側凹状面5B、7Aの第1の弾性変形位置との間隔
C 第2のレンチW2の上顎部側摺接部32Aと下顎部側摺接部33Aとの間隔
D 上顎部2Aが弾性変形していない状態における上顎部側凹状面5Aの最も凹んだ位置と第2の下顎部側凹状面6A、8Aの第2の弾性変形位置との間隔 DESCRIPTION OF SYMBOLS 1 Holder main body 2 Insert mounting part 2A Upper jaw part 2B Lower jaw part 3 Insert mounting seat 3A Seating surface 3B Press surface 4 Slit 4A Upper jaw side inner surface 4B Lower jaw side inner surface 5A Upper jaw side concave surface 5B, 7A First lower jaw Part-side concave surface 6, 7, 8 Arc-shaped groove 6A, 8A Second lower jaw side-side concave surface 11 Insert body 11A Mounting surface of insert body 11 11B Pressed surface of insert body 11 12 Cutting blade 21, 31 Wrench body 22, 32, 33 Pins 22A, 32A Upper jaw side sliding contact portion 22B, 33A Lower jaw side sliding contact portion W1, W2 Wrench P1, P2 Pin I Cutting insert A Upper jaw side sliding contact portion 22A and lower jaw portion of the first wrench W1 Distance between the side sliding contact portion 22B B The most depressed position of the upper jaw side concave surface 5A and the first lower jaw side concave shape in a state where the upper jaw portion 2A is not elastically deformed Interval between first elastic deformation position of 5B and 7A C Interval between upper jaw side sliding contact portion 32A and lower jaw side sliding contact portion 33A of second wrench W2 D In state where upper jaw portion 2A is not elastically deformed The distance between the most depressed position of the upper jaw side concave surface 5A and the second elastic deformation position of the second lower jaw side concave surfaces 6A, 8A
Claims (6)
- ホルダ本体に設けられた板状のインサート取付部に、このインサート取付部の先端部に開口して切削インサートが着脱可能に取り付けられるインサート取付座が該インサート取付部の板厚方向に貫通するように形成されるとともに、このインサート取付座の後端部には、該インサート取付座に連通して後端側に延びるスリットが形成されており、
上記スリットを間にして対向する上記インサート取付座の2つの内側面のうち、一方の内側面は上記切削インサートが着座させられる着座面とされるとともに、他方の内側面は上記切削インサートを上記着座面側に押圧する押圧面とされ、
上記インサート取付部のうち、上記着座面が形成された側は下顎部とされるとともに、上記押圧面が形成された側は上記下顎部に対して離間する方向に弾性変形可能な上顎部とされ、
上記上顎部には、上記押圧面よりも後端側の上記スリットの上顎部側内側面に、上記板厚方向から見て、上記スリットが延びる方向に長軸を有する半楕円弧状をなして上記上顎部側内側面から凹む上顎部側凹状面が形成されるとともに、
上記下顎部には、上記板厚方向から見て上記上顎部側凹状面に対して弧状をなして凹む複数の下顎部側凹状面が形成されていることを特徴とする刃先交換式バイト用ホルダ。 An insert mounting seat that opens at the tip of the insert mounting portion and is detachably mounted on the plate-like insert mounting portion provided in the holder main body so that the insert mounting seat penetrates in the thickness direction of the insert mounting portion. At the rear end portion of the insert mounting seat is formed a slit that communicates with the insert mounting seat and extends to the rear end side.
Of the two inner surfaces of the insert mounting seat facing each other with the slit in between, one inner surface is a seating surface on which the cutting insert is seated, and the other inner surface is the seating of the cutting insert. It is a pressing surface that presses to the surface side,
Of the insert mounting part, the side on which the seating surface is formed is a lower jaw part, and the side on which the pressing surface is formed is an upper jaw part that can be elastically deformed in a direction away from the lower jaw part. ,
The upper jaw part has a semi-elliptical arc shape having a major axis in the direction in which the slit extends as viewed from the plate thickness direction on the inner surface of the upper jaw part side of the slit on the rear end side of the pressing surface. The upper jaw side concave surface that is recessed from the inner side of the upper jaw side is formed,
A blade tip replaceable bite holder characterized in that the lower jaw part is formed with a plurality of lower jaw side concave surfaces that are recessed in an arc shape with respect to the upper jaw side concave surface when viewed from the plate thickness direction. . - 上記複数の下顎部側凹状面とのうち、1つは上記着座面よりも後端側の上記スリットの下顎部側内側面に形成されるとともに、残りは上記スリットから離れて上記下顎部に形成された弧状溝に形成されていることを特徴とする請求項1に記載の刃先交換式バイト用ホルダ。 Of the plurality of lower jaw side concave surfaces, one is formed on the lower jaw side inner surface of the slit on the rear end side of the seating surface, and the rest is formed on the lower jaw portion away from the slit The blade holder with a replaceable cutting edge according to claim 1, wherein the holder is formed in an arcuate groove.
- 上記複数の下顎部側凹状面は、上記スリットから離れるとともに互いにも離れて上記下顎部に形成された複数の弧状溝にそれぞれ形成されていることを特徴とする請求項1に記載の刃先交換式バイト用ホルダ。 2. The cutting edge replacement type according to claim 1, wherein the plurality of lower jaw side concave surfaces are formed in a plurality of arc-shaped grooves formed in the lower jaw part apart from the slit and from each other. Holder for tool.
- ホルダ本体に設けられた板状のインサート取付部に、このインサート取付部の先端部に開口して切削インサートが着脱可能に取り付けられるインサート取付座が該インサート取付部の板厚方向に貫通するように形成されるとともに、このインサート取付座の後端部には、該インサート取付座に連通して後端側に延びるスリットが形成されて、
上記スリットを間にして対向する上記インサート取付座の2つの内側面のうち、一方の内側面は上記切削インサートが着座させられる着座面とされるとともに、他方の内側面は上記切削インサートを上記着座面側に押圧する押圧面とされ、
上記インサート取付部のうち、上記着座面が形成された側は下顎部とされるとともに、上記押圧面が形成された側は上記下顎部に対して離間する方向に弾性変形可能な上顎部とされた刃先交換式バイト用ホルダと、
この刃先交換式バイト用ホルダの上記上顎部を上記下顎部に対して離間する方向に弾性変形させる複数のレンチとを備えた刃先交換式バイト用ホルダとレンチのセットであって、
上記上顎部には、上記押圧面よりも後端側に、上記板厚方向から見て、弧状をなして上記スリットに対して凹む上顎部側凹状面を有する凹部が形成されるとともに、
上記下顎部には、上記板厚方向から見て上記上顎部側凹状面に対して弧状をなして凹む複数の下顎部側凹状面が形成され、
上記複数の下顎部側凹状面のうち第1の下顎部側凹状面は、上記複数のレンチのうち第1のレンチの側部に突出するピンの上顎部側摺接部を上記上顎部側凹状面に摺接させるとともに、上記第1のレンチの側部に突出するピンの下顎部側摺接部を上記第1の下顎部側凹状面に摺接させつつ、この第1のレンチを上記第1の下顎部側凹状面に沿って回転させた際に、上記上顎部が上記下顎部に対して離間する方向に弾性変形させられる第1の弾性変形位置に上記第1のレンチを案内し、
上記複数の下顎部側凹状面のうち第2の下顎部側凹状面は、上記複数のレンチのうち第2のレンチの側部に突出するピンの上顎部側摺接部を上記上顎部側凹状面に摺接させるとともに、上記第2のレンチの側部に突出するピンの下顎部側摺接部を上記第2の下顎部側凹状面に摺接させつつ、この第2のレンチを上記第2の下顎部側凹状面に沿って回転させた際に、上記上顎部が上記下顎部に対して離間する方向に弾性変形させられる第2の弾性変形位置に上記第2のレンチを案内し、
上記第1のレンチの上顎部側摺接部と下顎部側摺接部との間隔Aと、上記上顎部が弾性変形していない状態における上記上顎部側凹状面の最も凹んだ位置と上記第1の下顎部側凹状面の第1の弾性変形位置との間隔Bとの差である第1の差A-Bと、
上記第2のレンチの上顎部側摺接部と下顎部側摺接部との間隔Cと、上記上顎部が弾性変形していない状態における上記上顎部側凹状面の最も凹んだ位置と上記第2の下顎部側凹状面の第2の弾性変形位置との間隔Dとの差である第2の差C-Dとが、A-B≦C-Dであることを特徴とする刃先交換式バイト用ホルダとレンチのセット。 An insert mounting seat that opens at the tip of the insert mounting portion and is detachably mounted on the plate-like insert mounting portion provided in the holder main body so that the insert mounting seat penetrates in the thickness direction of the insert mounting portion. At the rear end portion of the insert mounting seat is formed a slit that communicates with the insert mounting seat and extends to the rear end side.
Of the two inner surfaces of the insert mounting seat facing each other with the slit in between, one inner surface is a seating surface on which the cutting insert is seated, and the other inner surface is the seating of the cutting insert. It is a pressing surface that presses to the surface side,
Of the insert mounting part, the side on which the seating surface is formed is a lower jaw part, and the side on which the pressing surface is formed is an upper jaw part that can be elastically deformed in a direction away from the lower jaw part. A blade-type replaceable cutting tool holder,
A set of blade tip replaceable cutting tool holders and a wrench comprising a plurality of wrench for elastically deforming the upper jaw portion of the blade tip replaceable cutting tool holder in a direction away from the lower jaw portion,
The upper jaw is formed with a recess having an upper jaw-side concave surface that is recessed with respect to the slit in an arc shape when viewed from the plate thickness direction on the rear end side of the pressing surface.
The lower jaw portion is formed with a plurality of lower jaw side concave surfaces that are recessed in an arc shape with respect to the upper jaw side concave surface as seen from the plate thickness direction,
Among the plurality of lower jaw side concave surfaces, the first lower jaw side concave surface is a pin upper jaw side sliding contact portion protruding from the first wrench side of the plurality of wrenches, and the upper jaw side concave shape. The first wrench is slidably contacted with the first lower wrench while the lower ridge side slidable contact portion of the pin protruding from the side of the first wrench is slidably contacted with the first lower chin side concave surface Guiding the first wrench to a first elastic deformation position where the upper jaw is elastically deformed in a direction away from the lower jaw when rotated along a concave surface on the lower jaw of the first jaw;
Of the plurality of lower jaw side concave surfaces, the second lower jaw side concave surface is formed by changing the upper jaw side sliding contact portion of the pin protruding from the second wrench side of the plurality of wrenches into the upper jaw side concave shape. The lower wrench side sliding contact portion of the pin protruding from the side portion of the second wrench is slidably contacted with the second lower jaw side concave surface, and the second wrench is moved to the second wrench. The second wrench is guided to a second elastic deformation position where the upper jaw portion is elastically deformed in a direction away from the lower jaw portion when rotated along the lower jaw side concave surface of the lower jaw portion;
The distance A between the upper jaw side sliding contact portion and the lower jaw side sliding contact portion of the first wrench, the most recessed position of the upper jaw side concave surface in a state where the upper jaw portion is not elastically deformed, and the first A first difference AB, which is a difference from the distance B from the first elastic deformation position of the lower jaw side concave surface of
The distance C between the upper jaw side sliding contact portion and the lower jaw side sliding contact portion of the second wrench, the most concave position of the upper jaw side concave surface in a state where the upper jaw portion is not elastically deformed, and the first 2 A blade edge exchange type characterized in that a second difference CD, which is a difference from the distance D from the second elastic deformation position of the concave surface on the lower jaw side, is AB ≦ CD. Set of tool holder and wrench. - 上記複数の下顎部側凹状面のうち、1つは上記着座面よりも後端側の上記スリットの下顎部側内側面に形成されるとともに、残りは上記スリットから離れて上記下顎部に形成された弧状溝に形成されていることを特徴とする請求項4に記載の刃先交換式バイト用ホルダとレンチのセット。 Of the plurality of concave surfaces on the lower jaw side, one is formed on the inner surface of the lower jaw side on the rear end side of the seating surface, and the rest is formed on the lower jaw portion away from the slit. The set of a blade-tip-replaceable tool holder and a wrench according to claim 4, wherein the set is formed in an arcuate groove.
- 上記複数の下顎部側凹状面は、上記スリットから離れるとともに互いにも離れて上記下顎部に形成された複数の弧状溝にそれぞれ形成されていることを特徴とする請求項4に記載の刃先交換式バイト用ホルダとレンチのセット。 5. The cutting edge replacement type according to claim 4, wherein the plurality of lower jaw side concave surfaces are respectively formed in a plurality of arc-shaped grooves formed in the lower jaw part away from the slit and from each other. Set of tool holder and wrench.
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016219701A JP6809153B2 (en) | 2016-11-10 | 2016-11-10 | Grooving tool holder, grooving tool and grooving tool unit |
JP2016-219700 | 2016-11-10 | ||
JP2016219700A JP2018075676A (en) | 2016-11-10 | 2016-11-10 | Holder for grooving tool, grooving tool, and grooving tool unit |
JP2016-219701 | 2016-11-10 | ||
JP2017213156A JP6330963B1 (en) | 2017-11-02 | 2017-11-02 | Set of blade tip replaceable cutting tool holder and blade tip replaceable cutting tool holder and wrench |
JP2017-213156 | 2017-11-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2018088457A1 true WO2018088457A1 (en) | 2018-05-17 |
Family
ID=62110704
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2017/040357 WO2018088457A1 (en) | 2016-11-10 | 2017-11-09 | Holder for tool bit with exchangeable cutting edge and set of holder for tool bit with exchangeable cutting edge and wrench |
Country Status (1)
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WO (1) | WO2018088457A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000343304A (en) * | 1999-06-01 | 2000-12-12 | Toshiba Tungaloy Co Ltd | Throwaway type cutting tool |
JP2001138106A (en) * | 1999-11-11 | 2001-05-22 | Toshiba Tungaloy Co Ltd | Tool for cutting-off and grooving |
JP2007529329A (en) * | 2004-03-18 | 2007-10-25 | イスカーリミテッド | Cutting tool and cutting insert therefor |
-
2017
- 2017-11-09 WO PCT/JP2017/040357 patent/WO2018088457A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000343304A (en) * | 1999-06-01 | 2000-12-12 | Toshiba Tungaloy Co Ltd | Throwaway type cutting tool |
JP2001138106A (en) * | 1999-11-11 | 2001-05-22 | Toshiba Tungaloy Co Ltd | Tool for cutting-off and grooving |
JP2007529329A (en) * | 2004-03-18 | 2007-10-25 | イスカーリミテッド | Cutting tool and cutting insert therefor |
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