JPH0437684Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a cutting tool, and particularly to a cutting tool suitable for use in a cutting device that performs various types of cutting operations.

"Prior Art" Conventionally, a cutting tool used in cutting equipment such as a lathe has been known as a cutting tool holder to which a tip with a cutting edge is removably attached. I try to align it and fix it.

"Problems to be Solved by the Invention" The present invention attempts to solve the following problems in the conventional cutting tools mentioned above.

In other words, cutting devices, especially the lathes mentioned above, use tips with different cutting edge shapes to perform various cutting processes, but in the conventional cutting tools mentioned above, the tip and the tool holder are integrated. Because of this, it is necessary to remove the cutting tool holder from the tool rest when replacing the cutting tool.
As a result, the positional relationship between the tip and the turret is broken, and positioning work that requires precision must be performed each time it is reinstalled, making replacement work complicated. It is a point.

"Means for Solving the Problems" The present invention aims to provide a cutting tool that can effectively solve the above-mentioned conventional problems. A clamp rod that is inserted into the tool body and has a locking surface that is provided to protrude from the tool body and that engages a tool head having a cutting edge in the protrusion; a retracting mechanism that is brought into pressure contact with one end surface of the main body, and the retracting mechanism includes a support member attached to the tool main body across the clamp rod, and a support member interposed between the support member and the clamp rod so that both an actuating member slidably engaged with the actuating member; a clamp bolt screwed onto the actuating member to move the actuating member along the length of the support member; and an actuating member and a support member or a clamp rod. and an inclined sliding surface that is formed on the engaging portion to generate a wedge action between the two engaging portions.

"Operation" The cutting tool according to the present invention moves the actuating member along the supporting member with the clamp bolt,
The tool body and the clamp rod are engaged by creating a wedge action between the actuating member, the support member (i.e. the tool body) and the clamp rod, and releasing the wedge action by the clamp bolt. The tool head can be fastened to and released from the tool head, thereby making it possible to replace the cutting blade simply by operating the clamp bolt without having to attach or detach the tool body.

"Embodiment" An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

Reference numeral 1 in the figure indicates a cutting tool according to this embodiment.

The cutting tool 1 is slidably inserted into a tool body 2 and protrudes from the tool body 2, and a locking surface with which a tool head 4 having a cutting edge 3 is engaged is formed in the protrusion. The clamp rod 5 is made up of a retracting mechanism 6 that retracts the clamp rod 5 into the tool body 2 and presses the tool head 4 against one end surface of the tool body 2.
a support member 7 attached across the support member 7; and an actuation member 8 interposed between the support member 7 and the clamp rod 5 and slidably engaged with both.
a clamp bolt 9 that is screwed onto the actuating member 8 and moves the actuating member 8 along the length of the supporting member 7; and an engaging portion between the actuating member 8 and the supporting member 7 or the clamp rod 5. The slanted sliding surface 10 generates a wedge action between the two engaging portions.

Next, to explain these details, the tool main body 2 is formed into a substantially rectangular parallelepiped shape, and a rectangular cross-section that is held in a tool rest (not shown) of a cutting device is provided on the longitudinal side of the tool main body 2. Shape fixing part 2
a is integrally formed, and a large number of V-shaped grooves 11 are formed in parallel on one end surface in the length direction. Further, the tool body 2 has a guide hole 12 formed along its length that opens on the side where the groove 11 is formed, and the clamp rod 5 is slidably fitted into the guide hole 12. It is inserted.

The tool head 4 is formed with engagement grooves 13 having the same shape and the same pitch as a large number of grooves 11 formed on one end surface of the tool body 2, so that the tool head 4 is pressed into contact with one end surface of the tool body 2. By engaging with the groove 11 when the clamp rod is moved, the tool head 4 and the tool body 2 are aligned in a direction perpendicular to the groove 11 and in the longitudinal direction of the clamp rod 5. Moreover, the engagement groove 13 is provided inside the tool head 4.
is formed, and an engagement groove 13 intersects with the surface.
A recessed portion 14 is formed which opens at each of the surfaces located on one end side, and in the recessed portion 14,
Engagement surface 1 parallel to the surface on which the engagement groove 13 is formed
A large diameter portion 14b forming the diameter 4a is formed.

The clamp rod 5 is formed into a cylindrical shape having an outer diameter that is approximately the same as the inner diameter of the guide hole 12, and has one end that allows the tool main body 2 to pass through the opening when inserted into the guide hole 12. An engaging protrusion 15 protruding outward is provided, and the engaging protrusion 15
The large diameter portion 14 of the tool head 4 is attached to the protruding end of the tool head 4.
A locking portion 16 is provided that is loosely fitted into the locking portion 16b and has a locking surface 16a with which the engaging surface 14a is engaged. Further, a notch 17 having a predetermined length in the longitudinal direction is formed in the intermediate portion of the clamp rod 5 in the longitudinal direction, and a portion of the inner surface of the notch 17 is directed toward the engaging protrusion 15. is inclined with respect to the longitudinal direction of the clamp rod 5,
The sliding surface 10a constitutes one of the sliding surfaces 10.

The support member 7 constituting the retraction mechanism 6 is formed into a substantially cylindrical shape, and is fixed to the tool body 2 in a state perpendicular to the clamp rod 5 inserted into the tool body 2, and the intermediate portion is connected to the clamp rod 5 inserted into the tool body 2. It is positioned within the notch 17 of No. 5. A notch 1 of the clamp rod 5 has a length substantially the same as the radius of the clamp rod 5 at the intermediate portion of the support member 7.
A recess 18 is formed with an open portion facing the bottom surface of the clamp rod 5 and the sliding surface 10a. A support hole 19 is formed at a position perpendicular to the width direction and eccentric from the center in the radial direction, and is communicated with the recess 18 and into which the clamp bolt 9 is inserted.

The actuating member 8 is formed in the shape of a rectangular parallelepiped, and is installed in the space formed by the recess 18 of the support member 7 and the notch 17 of the clamp rod 5, and is attached to the support member 7. It is held on the support member 7 by screwing a clamp bolt 9 thereon. Furthermore, the four surfaces surrounding the clamp bolt 9 are each
The bottom surface of the notch 17, the guide surface 7a formed in the recess 18, the other surface of the recess 18, and the notch 1
7, and the portion that is brought into contact with the sliding surface 10a is connected to the sliding surface 10 along with the sliding surface 10a.
It is made into the sliding surface 10b which constitutes.

On the other hand, the guide hole 1 formed in the tool body 2
2 and the other end of the clamp rod 5 inserted into the guide hole 12, that is, the engaging protrusion 1.
A coil spring 20 is interposed in a compressed state between the end portion on the side where 5 is not formed.
Therefore, the clamp rod 5 is constantly pressed against the tool body 2 via the operating member 8 and the support member 7 by the elastic force of the coil spring 20.

Further, in FIG. 2, the reference numeral 21 indicates the tool body 2.
The supporter is attached to the end face on the side where the groove 11 is formed, and is engaged with the tool head 4 in the same way as the tool head 4, thereby allowing the supporter to be attached to the tool body 2 in the direction perpendicular to the groove 11 and the clamp rod. 5 is aligned in the length direction, and the tool head 4 engaged with the engagement protrusion 15 of the clamp rod 5 is placed, thereby supporting the tool head 4 and adjusting the length of the groove 11. Positioning with respect to the tool body 2 in the horizontal direction is performed. Further, reference numeral 22 denotes a dowel pin attached to the tool body 2, which is provided for positioning the supporter 20 and the tool body 2 along the length direction of the groove 11, and is provided to position the supporter 20 and the tool body 2 in the longitudinal direction of the groove 11. In order to smoothly attach the supporter 21 to the tool body 2, the supporter 21 and the tool body 2 are allowed to move slightly in the direction orthogonal to the groove 11. It shows the bolts installed.

Cutting tool 1 of this embodiment configured in this way
rotate the clamp bolt 9 to release the actuating member 8.
and sliding surfaces 10a, 10b of clamp rod 5
By moving the actuating member 8 in the direction in which the clamp rod 5 is moved away, the engaging projection 15 of the clamp rod 5 is projected from the tool body 2 by the elastic force of the coil spring 20, and then the tool head is attached to the engaging projection 15. 4, and then rotate the clamp bolt 9 in the opposite direction to align the inclined sliding surfaces 10a and 1.
The clamp rod 5 is moved to the tool body 2 by the action of 0b.
This causes the tool head 4 to come into pressure contact with the tool body 2 and the grooves 11 and 1 of both
It can be assembled into a state in which 3 are interlocked.

In such an assembly operation, due to the engagement between the groove 11 of the tool body 2 and the engagement groove 13 of the tool head 4 as the clamp rod 5 is retracted,
The centering of both is automatically performed, and the actuating member 8 aligns the engaging portion between the actuating member 8 and the sliding surface 10a of the clamp rod 5 and the engaging portion between the actuating member 8 and the support member 7. Due to the wedge action generated during this process, a large pressure contact force is generated between the tool head 4 and the tool body 2, and the tool head 4 is firmly fixed.

The cutting tool 1 of this embodiment assembled as described above is mounted in a positioned state on the tool post of a cutting device via the fixing part 2a provided on the tool body 2, and is used for cutting work. However, since the relative rotation between the tool head 4 and the tool body 2 is restricted by both grooves 11 and 13 and the supporter 21 during cutting work,
As described above, in combination with the fact that the tool head 4 is firmly fixed, vibration of the cutting edge 3 is suppressed, and highly accurate cutting work can be achieved.

On the other hand, when changing the shape of the cutting edge 3, loosen the clamp bolt 9 to release the contact between the tool head 4 and the tool body 2, replace the tool head 4, and then proceed with the clamp operation in the same manner as described above. This can be done by tightening the bolt 9.

When the tool head 4 is fixed, the retracting force is transmitted to the support member 7 via the actuation member 8, and further transmitted from the support member 7 to the tool body 2, which is supported by the clamp bolt 9. Since only the tension in the axial direction is applied to the clamp bolt 9, it is easy to rotate the clamp bolt 9.

In this way, the replacement work of the cutting blade 3 is carried out by a simple operation such as press contact between the tool head 4 and the tool body 2 by rotating the clamp bolt 9 and releasing the pressure contact, and the cutting blade 3 and the cutting tool are replaced. Tool body 2, which is the main adjustment part when setting the positional relationship with the table
Since there is no need to release the connection between the tool head 4 and the tool rest, the positional shift of the tool head 4 after replacement is suppressed, and the replacement work is simplified, making it possible to quickly replace the cutting blade 3. Become.

It should be noted that the various shapes and dimensions of each component shown in the above embodiments are merely examples, and can be variously changed based on the cutting equipment to be applied, design requirements, etc.

For example, in the above embodiment, an example was shown in which the tool body 2 was formed into a rectangular parallelepiped shape, but a cylindrical,
Other shapes such as a polygonal prism may be used. Also, a fixing portion 2a may be formed in the tool main body 2, and the fixing portion 2a may be formed in advance.
Although an example has been shown in which the tool body 2 is attached to the cutting device via the tool a, the fixing portion 2a may be omitted by attaching the tool body 2 directly to the tool post instead. Further, sliding surfaces 10a and 10b are inclined on the clamp rod 5 and the operating member 8, respectively.
Although an example is shown in which a wafer is formed, it is also possible to implement only one of the wafers.

"Effects of the Invention" As explained above, the cutting tool according to the present invention is a cutting tool in which a tool head having a cutting edge is removably attached to a tool body, and the tool head is detachably attached to the tool body. a clamp rod which can be fitted into the tool body and is provided to protrude from the tool body and has a locking surface formed in the protrusion with which the tool head is engaged; It consists of a retraction mechanism that is brought into pressure contact with one end surface of the
The retraction mechanism includes a support member attached to the tool body across the clamp rod, and an actuating member interposed between the support member and the clamp rod so as to be slidably engaged with both. a clamp bolt screwed onto the actuation member to move the actuation member along the length of the support member;
The clamp bolt is characterized by comprising an inclined sliding surface formed at the engaging portion between the operating member and the supporting member or the clamp rod to generate a wedge action between the two engaging portions. Due to the wedging effect generated by the inclined surfaces between the clamp rod and the actuating and supporting members, a small clamping force causes a large force to be generated between the tool head and the tool body. The tool head can be firmly fixed by generating a pressure contact force, and the cutting blade can be replaced by simple operations such as turning the clamp bolt to press the tool head and the tool body and releasing the pressure contact. This eliminates the need to disconnect the connection between the tool body and the turret, which is the main adjustment part when setting the positional relationship between the cutting blade and the turret. The positional shift of the tool head can be suppressed,
Further, the retracting force of the tool head is transmitted to the support member via the operating member, and further transmitted from the support member to the tool body for support, so that the load applied to the clamp bolt is limited to the axial direction of the clamp bolt. It has excellent effects such as making the rotation operation easy and making the replacement work simple and quick.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a partially sectional plan view, FIG. 2 is a view taken along the - line in FIG. 1, and FIG. FIG. 2 is a sectional view taken along the line - in FIG. 1; DESCRIPTION OF SYMBOLS 1... Cutting tool, 2... Tool body, 3... Cutting blade, 4... Tool head, 5... Clamp rod, 6... Retraction mechanism, 7... Support member, 7a...
Guide surface, 8... Operating member, 9... Clamp bolt, 10, 10a, 10b... Sliding surface, 12...
Guide hole, 14... recess, 14a... engagement surface, 1
4b... Large diameter portion, 15... Engaging protrusion, 16... Locking portion, 16a... Locking surface, 17... Notch, 18
... recess, 16 ... support hole.

Claims (1)

[Scope of utility model registration request] A cutting tool comprising a tool body and a tool head having a cutting edge removably attached to the tool body, which is slidably fitted into the tool body and is provided to protrude from the tool body, with a tool head having a cutting edge attached to the protrusion. It consists of a clamp rod formed with a locking surface with which the tool head is engaged, and a retraction mechanism that retracts the clamp rod into the tool body and presses the tool head against one end surface of the tool body. a support member attached to the main body to intersect with the clamp rod; an actuation member interposed between the support member and the clamp rod so as to be slidably engaged with both; and an actuation member screwed onto the actuation member. a clamp bolt that moves the actuating member along the length of the support member; and an engaging portion between the actuating member and the support member or the clamp rod to generate a wedge action between the two engaging portions. A cutting tool comprising an inclined sliding surface.