JPH01240216A - Device for clamping cutting tool - Google Patents

Abstract

PURPOSE:To improve the operating property of the mounting/removing operation of a tool body by rotating an adjusting member provided in the radial direction of an adaptor body from the outer peripheral side of the body to rotate a rotary member, and making a clamping member vertically moved in the rotating direction of the body being interlocked with this rotation. CONSTITUTION:In the operation of fixing a tool body 2 to an adaptor body 1, first a wrench is inserted into the wrench hole 31 of an adjusting member 3 and rotated to rotate a rotary member 4, making the space W between the face 52 of a clamping member 5 and the end face 19 of the body 1 in a condition for the projecting portion 26 of the tool 2 to be inserted therein. Then, by positioning the through portion of the tool body 2 in the receiving portion 53 of an adaptor, the fitting hole 23 of the tool is fitted on the projecting portion 18 of the adaptor, the tool body 2 is rotated until the end face of a key groove 27 is brought into contact with a key 7, the projecting portion 26 is positioned in the center portion of the receiving portion 53 of the adaptor, and the adjusting member 3 is rotated reversely to above. Thereby, the clamping member 5 is moved upward in the axial direction of adaptor to fix the tool body 2 to the adaptor body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a cutting tool fastening device used for fixing a relatively large diameter and heavy cutting tool such as a milling cutter or a polling cutter to a machine tool. [Prior Art] Conventionally, in order to easily, quickly, and safely attach a large diameter and heavy cutting tool such as a milling cutter to a machine tool, the milling cutter was divided into an adapter side and a cutter body. For example, Japanese Utility Model Publication No. 18247/1983 discloses a device that is light in weight and easy to handle.

The technique disclosed in this publication is to divide a milling cutter into a cutter body and an adapter body, install a desired number of bolt heads on the adapter side, and place the heads of the bolts in the cutter body at positions corresponding to the bolts. It consists of a hole that penetrates the cutter body, and a daruma-shaped hole that locks the head.When the adapter body is installed in a machine tool, the head through hole of the cutter body is inserted into the head. After that, the cutter body is rotated by a predetermined amount, the holes 1 to 1 are positioned in the head locking holes, and the holes 1 to are tightened to fix the cutter body to the adapter body.

=3- Furthermore, in Japanese Utility Model Publication No. 58-11465, a plurality of cutter bodies divided in the radial direction are inserted into an adapter body having a connecting member from the outer circumferential side of the adapter toward the center, and the connecting members are inserted into the adapter body. It is also disclosed that a plurality of cutter bodies are fixed to the adapter body by tightening the adapter body with the following.

[Problems with the prior art] However, the technology shown in the above-mentioned Japanese Utility Model Publication No. 18247/1983 requires at least four tightening holes to fix the cutter body to the adapter body on the machine tool side. It takes a considerable amount of time to operate four or more tightening poles 1~ when attaching and detaching the cutter body, which greatly increases the cost of attaching and detaching the cutter body. Since the tightening pole I~ is implanted in the axial direction on the outer circumferential side of the adapter body, the front side of the cutter body, that is, -4~ is the head having a wrench hole for the tightening pole 1 on the bottom side of the cutter. Because of the location of the cutter body, when attaching or detaching the cutter body, it is necessary to always raise the cutter body from the end face of the workpiece or machine tool table by at least a gap that allows wrench operation. There are problems with the time loss required and the complexity of attaching and detaching the cutter body to the adapter body.

The technique disclosed in Japanese Utility Model Publication No. 58-11465 is to divide a cutter body that can be attached and detached from an adapter body into a plurality of fan shapes, and to use these segments by fixing them with the same number of connecting members as the divided pieces of the body. However, since the cutter body that is fixed to the adapter body is divided into parts, the processing errors of each divided piece will accumulate, resulting in dimensional errors when the cutter body is fixed to the adapter body. However, when machining using this method, it is difficult to obtain a highly accurate machined surface.The other problem is that it is necessary to fix the cutter body to the adapter body or tighten each connecting member, and the cutter body It also has the disadvantage that it is complicated to attach and detach.

[Object of the Invention] The present invention has been made in view of the above-mentioned problems, and provides a cutting tool that allows the attachment and detachment of the cutter body from the attachment and detachment of the cutter body to be carried out easily, and also provides a highly accurate cutter itself. The object of the present invention is to provide a fastening device.

[Means for Solving the Problems] The present invention solves the aforementioned problems by the following means.

That is, it consists of an adapter body that is attached to the machine tool side, and a cutting tool body that is fitted into the adapter body and fixed in a detachable manner. A ring-shaped rotating member is provided in the axial direction of the main body, and a ring-shaped rotating member is formed in the upper end surface with a heel gear that is disposed in the radial direction and that meshes with the heel gear, and has a screw gear on the outer periphery, and a screw that meshes with the screw gear. An L-shaped fan-shaped fastening member formed into a gear and having a receiving portion for the cutting tool main body is arranged from the end face of the adapter main body with a space in which the receiving portion is fitted into at least a protrusion of the cutting tool main body. Then, by applying rotation to the above-mentioned adjustment member, the rotating member is rotated to move the fastening member up and down in the axial direction of the adapter body, and with the fastening member moved downward by a predetermined amount, the adapter body The main body of the cutting tool, in which the ring-shaped protrusion is fitted into a fitting hole provided on the tool and fixed, has a through hole that penetrates the receiving part of the fastening member, and a receiving part that has a protrusion that fixes the receiving part. A fitting hole is provided.

[Function of the invention] =7- In the present invention, when the adjustment member located in the radial direction of the adapter body is rotated from the outer circumferential side of the adapter body using a wrench or the like, the rotating member rotates, and the fastening is performed in conjunction with this rotation. The member is moved up and down in the axial direction of the adapter body, and the fastening member is moved downward until the protrusion of the tool body can be fitted as described above, and the fastening member in the adapter body is inserted into the through hole of the tool body. position, fit the ring-shaped protrusion of the adapter body into the fitting hole of the tool body, and then press the ring-shaped protrusion of the adapter body into the fitting hole of the tool body by a predetermined amount (a state in which the key provided on the tool body contacts the end of the keyway formed on the tool body). ) Rotate the tool body to position the receiving part of the fastening member on the adapter body on the protrusion of the tool body, and then rotate the adjustment member of the adapter body with a wrench or the like to raise the fastening member, thereby tightening the fastening member into the adapter body. This is to securely fasten the tool body.

The second effect is that the tool body can be attached and detached from the outer periphery of the adapter body, so the operation can be performed quickly and safely. In addition, the outer circumference of the adapter body is provided with a plurality of adjustment members, and it is possible to attach and detach the tool body to and from the adapter body by operating one of these adjustment members. When the tool body is fastened by manipulating the parts, an even fastening stress is applied to the tool body, making it possible to fasten accurately and firmly. Only a very small amount of distance is required, which greatly improves work efficiency.

"Example" Embodiments will be described below with reference to the attached drawings.

The figure shows a cutting tool fastening device according to the present invention.
FIG. 1 shows a front view cut away from the main part of the device, FIG. 2 is a front view cut away from the main part of the adapter body, and FIG.
Figures 4 and 5 show the main body of the cutting tool.
The figures are a top view of FIG. 5, a front view of main parts in section, etc.

The cutting tool fastening device A according to the present invention includes an adapter main body 1
and a cutting tool main body 2 (the embodiment is a face milling cutter), and the adapter main body includes an adjusting member 3, a ring-shaped rotating member 4, a fastening member 5 having a fan-like shape when viewed from the bottom, and a cutout for the rotating member 4 described above. A fixing member 6 serving as a stopper (W) and a key 7 for preventing rotation of the cutting tool body 2 are attached.

The adapter body 1 as described above has a machine tool (
It has a hole 11 that fits into a spindle (not shown) and a key groove 12 that fits a detent key, and around it a plurality of port holes 13 for mounting. A hole 14 into which the adjustment member 3 is fitted from the outer circumferential side toward the center of the shaft, and a receiving hole 14 for the adjustment member concentrically with the hole 14.
A is provided in the center of the fitting hole 14, and a means 14b (snap ring or pole l~) is formed in the center of the fitting hole 14 to allow the adjustment member to rotate freely and to prevent it from being pulled out in the axial direction. has a hole 15 in which the ring-shaped rotating member 4 is fitted with one side open; a hole 16 in the outer periphery in which the key 7 is fitted; and a tightening member 5 that passes through the ring-shaped rotating member fitting hole 15. A fan-shaped hole 17 into which the tool body 2 is inserted and a ring-shaped protrusion 18 into which the fitting hole of the tool body 2 is inserted are formed.

The adjusting member 3, which is rotatably fitted into the fitting hole 14 of the adapter body, has a wrench 631 at one end and a bevel gear 32 (pinion gear) at the other end. The shaft 33 is provided so as to be able to be inserted into the hole 14a without bearing action.

The ring-shaped rotating member 4 inserted into the fitting hole 15 of the main body has a bevel gear 41 on its end face that meshes with the bevel gear 32 of the adjustment member, and a screw gear 42 on its outer periphery. 4, a fixing member 6 is fixed to the lower part of the main body by a bolt 6a in order to rotate the main body with reference to the inner circumference 15 of the hole and to prevent the main body from moving in the axial direction.

The fastening member 5 has a screw gear 51 at a predetermined position on the inner circumference that meshes with the screw gear 42 of the rotating member, and has a fan-like shape when viewed from the bottom, and has a tool body 2 at the end.
A receiving surface 52 for the protrusion is formed.

In the embodiment, the fastening member 5 has a fan-like shape when viewed from the bottom, and is used by being inserted into the fan-shaped hole 17 of the main body provided corresponding to the shape.
is formed into a cylindrical shape, and the screw gear 51 and the outer peripheral portion corresponding to the hole 17 of the fastening member are formed into a ring shape, and the portion corresponding to the protrusion of the tool body 2 and the Q-receiving surface 52 are formed into a ring shape. Forming it in a fan shape as shown in FIG. 3 is advantageous because it prevents the tool 2 from buckling when the tool 2 is tightened by the fastening portion.

However, in order to prevent the rotating portion 4 and the fastening member 5 from rotating together, it is more effective to provide a rotation stopper for the fastening member.

In addition, insert the round key 7 into the key fitting hole 16 of the main body.
It is fixed by.

In the adapter main body 1, which has a two-part configuration, when a wrench (not shown) is inserted into the wrench 631 of the adjustment member to give rotation to the member, the rotating member 4 meshed with the bevel gear rotates. A fastening member 5 that meshes with this rotating member through a screw gear moves up and down in the axial direction of the main body.

As a result, a desired space W is formed between one end face of the main body and the receiving surface 52 of the fastening member, and the cutting tool main body can be attached and detached by opening this space.

The cutting tool body 2 that can be attached to and detached from the adapter body described above is
A tip 20 having a predetermined shape is mechanically or physically fixed to the outer periphery, a hole 21 is provided in the center, and a hole 21 is provided on the second side 22 to connect to the ring-shaped protrusion 18 of the adapter body. A fitting hole 23 is formed in which the adapter and the tool body 2 are fitted together so that they are positioned together, and a receiving portion 53 of a fastening member on the adapter can be inserted above the hole 21. A receiving hole 24 is provided.

The details of each of the above-mentioned parts are shown in FIG. 4, as shown in FIG. 26a, 26b, 26c, and 26d, and on the outside thereof are the adder]4- key grooves 27a, 27 into which the key 7 on the butter body is fitted;
'b is provided.

These key grooves 27a, 27b and protrusions 26a, 26b, 2
The positional relationship between 6c and 26d is such that the receiving part 53 of the fastening member in the adapter body is located in the penetration part 25 of the tool body 2, and the key 7 in the adapter is located in the key grooves 27a and 27b.
The receiving surface 52 of the fastening member is located at the center of the projections 26a, 26b, 26c, and 26d in a state where the key 7 is in contact with one end surface of the keyway 27a, 27b.
When the receiving portion 53 is in contact with the other end surface of the penetrating portion 2
5 should be located in the center of the square.

Further, the thickness of the protruding portion 23 of the tool body 2 is set such that it can be inserted into the space W formed by the end surface 19 of the adapter body and the receiving portion 52 of the fastening member.

The usage pattern of the cutting tool fastening device configured as described above is as shown in FIG. 4 to make the space W between the surface 52 of the fastening member and the end surface 19 of the main body into a state in which the protrusion 26 of the tool 2 can be inserted, and then the penetrating part 25 of the tool main body is positioned in the receiving part 53 of the adapter. Then, fit the fitting hole 23 of the tool into the protrusion 18 of the adapter, and rotate the tool main body 2 until the key 7 comes into contact with the end face of the keyway 27, and then insert the protrusion 26 of the tool into place.
The tool body is fixed to the adapter body by rotating the adjusting member 3 in the opposite direction as described above while positioning the tool body at the center of the receiving part 52 of the adapter, and moving the fastening member 5 upward in the axial direction of the adapter. When removing the tool body from the adapter body, the operation described above is reversed.

Although the cutting tool main body of the above-described embodiment has been explained using a face milling cutter as an example, it can also be used in place of a polling tool.

[Effects of the Invention] With the configuration and operation described above, the present invention allows the cutting tool body to be attached and detached from the adapter body extremely smoothly, and the time required to replace the cutting tool is greatly reduced. In addition to improving workability and safety, the cutting tool is now more accurately and firmly fixed to the adapter body, improving the precision of the workpiece and greatly extending the tool life. be.

[Brief explanation of the drawing]

The figure shows a cutting tool fastening device according to the present invention.
FIG. 1 is a front view in section of the main part of the device, FIG. 2 is a front view in cross section of the main part of the adapter body, and FIG. 3 shows the axial tip rule in FIG. FIG. 5 shows the main body of the cutting tool, FIG. 4 is a top view of FIG. 5, and FIG. 5 is a front view of main parts in section. A--All cutting tool fastening device 1-1-Adapter body
2-All cutting tool body 3-m-adjusting member 4-m-rotating member 5-m-fastening member 6--fixing member 7--
-Key 6a-m-bolt 7a---bolt

Claims (1)

[Claims] (1) An adapter body that can be attached to the machine tool side,
a cutting tool body that is fitted into the adapter body and fixed thereon in a detachable manner; the adapter body has an adjustment member in the radial direction of the body with a bevel gear formed at an end thereof; and a bevel gear that meshes with the bevel gear; A ring-shaped rotating member having a gear formed on the upper end surface and a screw gear on the outer periphery is provided in the axial direction of the main body to form a screw gear that meshes with the screw gear, and a receiving portion for a cutting tool. An L-shaped fan-shaped fastening member is disposed from the end face of the adapter body so that the receiving part has a space into which at least the protrusion of the cutting tool body fits, and rotation is imparted to the adjustment member. The rotating member is rotated to move the fastening member up and down in the axial direction of the adapter body, and while the fastening member is moved downward by a predetermined amount, the ring-shaped protrusion of the adapter body is inserted into the fitting provided on the tool. The cutting tool body that is fitted into and fixed in the mating hole has a through hole through which the receiving part of the fastening member passes, and a receiving part fitting hole having a protrusion that fixes the receiving part. Cutting tool fastening device.