JP3666204B2 - Grinding apparatus and grinding method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a grinding apparatus and a grinding method for a workpiece having a cylindrical portion perpendicular to the workpiece axis on both sides of a truncated cone-shaped tapered portion.
[0002]
[Prior art]
Grinding of a workpiece W having cylindrical portions WA and WB perpendicular to the workpiece axis 0-0 on both sides of the truncated cone-shaped tapered portion WC shown in FIG. The cylindrical portions WA and WB are plunge-ground by the grindstone 50 of the straight surface 51 parallel to 0, and then the workpiece W is inclined at an inclination angle of the tapered portion WC as shown in FIG. The tapered portion WC was traversed in parallel with the traverse direction of the table.
[0003]
[Problems to be solved by the invention]
In the conventional grinding, the grinding process of the cylindrical parts WA and WB and the taper part WC of the workpiece W is divided into two processes, so that there is a problem that the grinding time becomes long.
[0004]
An object of the present invention is to enable grinding of a cylindrical portion and a tapered portion of a workpiece in one process, thereby shortening the grinding time.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a grinding apparatus according to the present invention comprises a cylindrical portion parallel to an axial direction of a workpiece supported by a headstock and a tailstock, as defined in claim 1, and the axis. In a grinding apparatus for grinding a workpiece having a tapered portion inclined with respect to the grinding wheel by moving the grindstone and the workpiece relative to each other, a straight surface portion protruding from the outer peripheral surface and parallel to the traverse direction of the traverse table, and the side of the straight surface portion And a grindstone having a tapered surface portion which is inclined with respect to the traverse direction of the traverse table and parallel to the inclination angle of the taper portion of the workpiece, and the workpiece has a tapered portion of the workpiece with respect to the traverse direction of the traverse table. A taper angle adjusting means for inclining by the same angle as the inclination angle and a control means for controlling the relative movement of the grindstone and the workpiece are provided.
[0006]
The grinding device according to the present invention includes a cylindrical portion that is parallel to the axial direction of the workpiece supported by the headstock and the tailstock, and is inclined with respect to the axis. In a grinding apparatus for grinding a workpiece having a tapered portion by moving the grindstone and the workpiece relative to each other, the tapered surface portion protrudes from the outer peripheral surface and is inclined with respect to the traverse direction of the traverse table and parallel to the inclination angle of the tapered portion of the workpiece. And a grindstone having a straight surface portion parallel to the traverse direction of the traverse table on the tapered surface portion, and a control means for controlling the relative movement of the grindstone and the workpiece.
[0007]
Furthermore, the grinding method according to the present invention includes a cylindrical portion parallel to the axial direction of the workpiece supported by the headstock and the tailstock, and inclined with respect to the axis. A grinding method for grinding a workpiece having a tapered portion by moving the grindstone and the workpiece relative to each other, wherein the center of the cylindrical portion of the outer peripheral surface protrudes radially with respect to both sides of the grindstone. Grind the left cylindrical part of the work piece at the right end, grind the right cylindrical part of the work piece at the left end of the grindstone, and grind the taper part of the work piece at the center protrusion of the grindstone It is characterized by that.
[0008]
Further, in the grinding method according to claim 3, as described in claim 4, the grindstone has a central projecting portion inclined with respect to the traverse direction of the traverse table and an inclination angle of the tapered portion of the workpiece. A parallel taper surface portion, a straight surface portion parallel to the traverse direction of the traverse table on both sides of the taper surface portion, an end surface portion connecting the taper surface portion and the straight surface portion and orthogonal to the straight surface portion; The grinding is performed while being supported in parallel with the traverse direction of the traverse table.
[0009]
Furthermore, the grinding method according to the present invention includes a cylindrical portion parallel to the axial direction of the workpiece supported by the headstock and the tailstock, and inclined with respect to the axis. A grinding method for grinding a workpiece having a tapered portion by moving the grindstone and the workpiece relative to each other, and projecting to the center of the outer peripheral surface and parallel to the traverse direction of the traverse table, and on both sides of the straight surface portion A grindstone having a tapered surface portion that is inclined with respect to the traverse direction of the traverse table and parallel to the inclined angle of the tapered portion of the workpiece, and an end surface portion that connects the straight surface portion and the tapered surface portion and is orthogonal to the inclined angle of the tapered surface portion. By tilting the workpiece with respect to the traverse direction of the traverse table by the same angle as the tilt angle of the tapered portion of the workpiece, the workpiece is formed at the tapered surface portion of the grindstone. The cylindrical portion is ground, is characterized in that grinding the tapered portion of the workpiece in a straight surface of the grinding wheel.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of a grinding apparatus and its control unit. In FIG. 1, reference numeral 10 denotes a bed, and a traverse table 11 is installed on the bed 10 so as to be able to traverse in the Z-axis direction. On the traverse table 11, a swivel table 13 is installed so as to be capable of tilting and moving at an arbitrary tilt angle θ with respect to the Z axis that is the traverse feed direction of the traverse table 11.
[0011]
On the swivel table 13, a headstock 15 and a tailstock 16 are installed opposite to the headstock 15, and the workpiece W is supported between the spindle stock 15 and the tailstock 16. This workpiece W has a shape having cylindrical portions WA and WB perpendicular to the axis of the workpiece on both sides of the tapered portion WC having a truncated cone shape.
[0012]
Further, on the bed 10, a grindstone table 17 that rotationally drives the grindstone 18 is installed so as to be movable in the X-axis direction perpendicular to the Z-axis line of the traverse feed of the traverse table 11.
[0013]
The traversed table 11 is feed controlled in the Z-axis direction by a feed screw (not shown) rotated by a servo motor 12. The swivel table 13 is controlled to an arbitrary inclination angle θ by a feed screw (not shown) rotated by the servo motor 14. Further, the grindstone platform 17 is controlled to advance and retract in the X-axis direction by a feed screw (not shown) rotated by a servo motor 19.
[0014]
In FIG. 1, reference numeral 20 denotes a numerical control device that controls and manages the entire grinding apparatus, and includes a central processing unit 21, a memory 25 storing a machining program, an input device 22, and a first interface 24 connected to an output device 23. And a second interface 26 connected to the servo motors 12, 14, 19 via drive circuits 29, 28, 27.
[0015]
The grindstone 18 provided on the grindstone base 17 will be described with reference to FIG. A grindstone 18A shown in FIG. 2 is a first embodiment. That is, the straight surface portion 30 that protrudes in the center of the outer peripheral surface of the grindstone 18A and is parallel to the traverse direction (Z-axis direction) of the traverse table 11 and the traverse direction of the traverse table 11 (Z-axis direction) on both sides of the straight surface portion 30 In contrast, it has tapered surface portions 31a and 31b which are inclined with respect to the inclined angle θ of the tapered portion WC of the workpiece W.
[0016]
FIG. 3 shows a grinding method using the grindstone 18A of the first embodiment. In this case, the workpiece W is tilted by the swivel table 13 by the tilt angle θ of the tapered portion WC, and the axis 0-0 of the workpiece W is tilted to coincide with the traverse direction (Z-axis direction) of the traverse table 11. Thereby, the cylindrical portions WA and WB of the workpiece W are inclined by the inclination angle θ of the tapered portion WC.
[0017]
Therefore, first, one cylindrical portion WA on the left side in the figure is plunge ground with the tapered surface portion 31b of the grindstone 18A, and the left side surface of the cylindrical portion WA is ground with the right side surface of the straight surface portion 30 of the grindstone 18A. Next, the grindstone 18A is retracted by a required amount, the traverse table 11 is traversed to the left side, and when the cylindrical portion WA passes the straight surface portion 30 of the grindstone 18A, the grindstone 18A is advanced, and the traverse table 11 is traversed to the right side. The right side surface of the cylindrical portion WA is ground by the left side surface of the straight surface portion 30 of the grindstone 18A.
[0018]
Then, the traverse table 11 is traversed to the left, and the taper portion WC is traversed by the straight surface portion 30 of the grindstone 18A. Following the traverse grinding of the taper portion WC, the grindstone 18A is advanced, and the other cylindrical portion WB on the right side is plunge-ground by the taper surface portion 31a of the grindstone 18A.
[0019]
A grindstone 18B shown in FIG. 4 is a second embodiment. That is, the taper surface portion 40 that protrudes in the center of the outer peripheral surface of the grindstone 18B and is inclined with respect to the traverse direction (Z-axis direction) of the traverse table 11 and parallel to the inclination angle θ of the taper portion WC of the workpiece W, and the taper. Straight surface portions 41 a and 41 b parallel to the traverse direction of the traverse table 11 are provided on both sides of the surface portion 40.
[0020]
FIG. 5 shows a grinding method using the grindstone 18B of the second embodiment. In this case, the axis 0-0 of the workpiece W is made to coincide with the traverse direction (Z-axis direction) of the traverse table 11. As a result, the tapered portion WC of the workpiece W is inclined at the inclination angle θ.
[0021]
Therefore, first, one cylindrical portion WA on the left side in the figure is plunge ground with the right straight surface portion 41b of the grindstone 18B, and the left side surface of the cylindrical portion WA is ground with the right side surface of the tapered surface portion 40 of the grindstone 18B. Next, the grindstone 18B is retracted by a required amount, the traverse table 11 is traversed to the left, and the grindstone 18B is advanced when the cylindrical portion WA passes the tapered surface portion 40 of the grindstone 18B, and the traverse table 11 is traversed to the right. The right side surface of the cylindrical portion WA is ground by the left side surface of the tapered surface portion 40 of the grindstone 18B.
[0022]
Then, the traverse table 11 is traversed to the left side, and the tapered portion WC is traverse-ground by the tapered surface portion 40 of the grindstone 18B. The traverse grinding of the taper portion WC by the taper surface portion 40 is performed by simultaneous two-axis control by the traverse of the traverse table 11 and the backward feed movement of the grindstone table 17. Following the traverse grinding of the taper portion WC, the grindstone 18B is advanced, and the other cylindrical portion WB on the right side is plunge-ground with the straight surface portion 41a of the grindstone 18B, and the process ends.
[0023]
In any of the first and second embodiments, the workpiece W is inclined by the swivel table 13 by the inclination angle θ of the tapered portion WC of the workpiece W with respect to the traverse direction (Z-axis direction) of the traverse table 11, Alternatively, after aligning the axis 0-0 of the workpiece W with the traverse direction (Z-axis direction) of the traverse table 11, only the cutting of the grindstones 18A and 18B and the traverse of the traverse table 11 are used to form the cylindrical portion WA, the tapered portion WC, and The cylindrical portion WB can be ground in one step, and the grinding time can be shortened.
[0024]
【The invention's effect】
As described above, according to the present invention, when grinding a workpiece having a truncated conical tapered portion and a cylindrical portion having a cylindrical portion perpendicular to the workpiece axis on both sides thereof, conventionally, a cylindrical portion and a tapered portion are provided. Can be performed in two separate steps, and the grinding time can be shortened.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a grinding apparatus and its control unit according to the present invention. FIG. 2 is a cross-sectional view of a main part showing a first embodiment of a grindstone used in the present invention. Phase diagram [FIG. 4] Cross-sectional view of the main part showing a second embodiment of the grindstone used in the present invention [FIG. 5] Grinding state diagram by the grindstone of the second embodiment [FIG. 6] Grinding state diagram of a conventional cylindrical portion [ Fig. 7 Conventional grinding state of taper section [Explanation of symbols]
11 Traverse table 13 Swivel table 17 Grinding wheel base 18 Grinding wheel 18A Grinding wheel (first embodiment)
18B grinding wheel (second embodiment)
20 Numerical controller 30 Straight surface portion 31a Tapered surface portion 31b Tapered surface portion 40 Tapered surface portion 41a Straight surface portion 41b Straight surface portion W Workpiece WA Cylindrical portion WB Cylindrical portion WC Taper portion

Claims (5)

A grindstone and a workpiece are moved relative to each other in a workpiece having a cylindrical portion parallel to the axial direction of the workpiece supported by the headstock and the tailstock and a tapered portion inclined with respect to the axis. In a grinding device for grinding,
A straight surface portion that protrudes from the outer peripheral surface and is parallel to the traverse direction of the traverse table, and a tapered surface portion that is inclined to the traverse direction of the traverse table and is parallel to the inclination angle of the taper portion of the workpiece on the side of the straight surface portion. A grindstone having,
A taper angle adjusting means for tilting the workpiece with respect to the traverse direction of the traverse table by the same angle as the taper portion of the workpiece, and a control means for controlling the relative movement of the grindstone and the workpiece. A grinding device characterized by the above. A grindstone and a workpiece are moved relative to each other in a workpiece having a cylindrical portion parallel to the axial direction of the workpiece supported by the headstock and the tailstock and a tapered portion inclined with respect to the axis. In a grinding device for grinding,
A grindstone that protrudes on the outer peripheral surface and is inclined with respect to the traverse direction of the traverse table and is parallel to the inclination angle of the taper portion of the workpiece, and has a straight surface portion parallel to the traverse direction of the traverse table on the taper surface portion,
A grinding apparatus comprising: control means for controlling relative movement of the grindstone and the workpiece. A grindstone and a workpiece are moved relative to each other in a workpiece having a cylindrical portion parallel to the axial direction of the workpiece supported by the headstock and the tailstock and a tapered portion inclined with respect to the axis. A grinding method for grinding, wherein a cylindrical portion on the left side of a workpiece is ground at a right end portion of a grindstone using a grindstone in which a center of a cylindrical portion of an outer peripheral surface protrudes radially with respect to both sides thereof. A grinding method characterized in that the right cylindrical portion of the workpiece is ground at the left end of the workpiece and the tapered portion of the workpiece is ground at the center protruding portion of the grindstone. The grindstone has a taper surface portion in which a central protrusion portion is inclined with respect to the traverse direction of the traverse table and is parallel to the inclination angle of the taper portion of the workpiece, and parallel to the traverse direction of the traverse table on both sides of the taper surface portion. A straight surface portion, and an end surface portion that connects the tapered surface portion and the straight surface portion and is orthogonal to the straight surface portion;
The grinding method according to claim 3, wherein the workpiece is ground in parallel with the traverse direction of the traverse table. A grindstone and a workpiece are moved relative to each other in a workpiece having a cylindrical portion parallel to the axial direction of the workpiece supported by the headstock and the tailstock and a tapered portion inclined with respect to the axis. A grinding method for grinding,
A straight surface portion that protrudes in the center of the outer peripheral surface and is parallel to the traverse direction of the traverse table, and a tapered surface portion that is inclined with respect to the traverse direction of the traverse table on both sides of the straight surface portion and parallel to the inclination angle of the taper portion of the workpiece And the grindstone having an end surface portion that connects the straight surface portion and the taper surface portion and is orthogonal to the inclination angle of the taper surface portion, the work piece is inclined at the same angle as the inclination angle of the taper portion of the work piece with respect to the traverse direction of the traverse table. Tilt,
A grinding method comprising grinding a cylindrical portion of a workpiece with a tapered surface portion of the grindstone, and grinding a tapered portion of the workpiece with a straight surface portion of the grindstone.

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