JPH0123682Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a cutting tool holder equipped with a mechanism for finely adjusting the position of the cutting edge.

BACKGROUND ART Conventionally, as this type of tool holder, one having the configuration shown in FIG. 3 has been known. That is, a male thread 3 is formed on the outer peripheral surface of the distal end of a holder 2 having a cutting edge 1 such as a throw-away tip attached to the distal end, and a female thread 4 is formed along the axial direction on the rear end. and the holder 2 is integrated into a main body 5 that is integrated with a machine (not shown) such as a tool rest,
It is inserted while being prevented from rotating by a key 6.
A fine adjustment nut 7 that contacts the end surface of the main body 5 is attached to the male screw 3, and a bolt 9 into which a ring 8 is fitted is screwed into the female screw 4 at the rear end. The ring 8 and bolt 9
A compression spring 10 is arranged between the head of the
By bringing the ring 8 into contact with the main body 5, a tension force is applied to the holder 2 by the compression spring 10.

In the tool holder configured as described above, the position of the cutting edge is measured by applying a setting gauge (not shown) to the cutting edge 1, and the amount of protrusion of the holder 2 from the main body 5 is changed by rotating the fine adjustment nut 7. to adjust the blade edge position. By applying a tensile force to the holder 2 by the compression spring 10,
The backlash between the fine adjustment nut 7 and the male screw 3 into which it is screwed is removed.

Problems that the invention aims to solve However, with the conventional tool holder mentioned above,
Since the fine adjustment nut 7 for changing the position of the blade edge is located near the blade edge part 1, there is a problem that the setting gauge gets in the way when adjusting the position of the blade edge, making it difficult to operate the fine adjustment nut 7. Ta. Generally, the tool holder needs to be fitted to the main body with a certain length to withstand the load during cutting, but the conventional tool holder described above has a bulge removal mechanism that includes the bolt 9, compression spring 10, etc. Since the mechanism is provided at the rear end of the holder 2, there is a problem that the overall length becomes long.

Considering the above circumstances, this idea has good operability and
Moreover, it is an object of the present invention to provide a finely adjustable tool holder that can be made compact by shortening its overall length.

Means for Solving the Problems In order to achieve the above-mentioned purpose, this invention allows the shaft of the holder, which has a cutting edge at the tip, to be inserted into and removed from the main body for mounting on a machine such as a tool rest. The male threaded part of the fine adjustment screw is screwed into the female thread drilled in the rear end of the shaft of the holder, and the fine adjustment screw is rotated freely relative to the main body and in the axial direction. The holder is mounted in such a way that movement is prevented, and a pressing member built into the main body is elastically pressed against an inclined surface formed on the outside of the shaft portion of the holder to apply a pressing force to the holder in the axial direction. It is characterized by the following structure.

Function: Therefore, in the fine-adjustable cutting tool holder of this invention, by rotating the fine-adjusting screw, the holder with the cutting blade attached to the tip moves in its axial direction, making it possible to finely adjust the position of the cutting edge. . In addition, since the pressing member is elastically pressed against the inclined surface formed on the outside of the holder, a force directed in the axial direction of the holder is constantly applied to the holder, and as a result, the part where the fine adjustment screw is screwed The backup is removed.

Embodiment FIGS. 1 and 2 are diagrams showing an embodiment of this invention, in which a holder 12 with a cutting blade 11 provided at the tip is attached to a main body 1 that is attached to a machine such as a tool rest.
3, an inclined surface 15 that slopes upward toward the rear end is formed on the outer peripheral upper surface of the shaft 14 inserted into the shaft 14, and a female screw 16 is further formed in the center of the rear end along the axial direction. The holder 12 is inserted into the main body 13 by its shaft portion 14 so as to be prevented from rotating by a key 17 and to be movable in the axial direction. On the other hand, a through hole extending in a direction perpendicular to the shaft portion 14 of the holder 12 is formed from the upper surface at a location corresponding to the inclined surface 15 of the main body 13, and a steel ball as a pressing member is inserted into the through hole. 18 and an elastic member 19 such as a disc spring are sequentially inserted and are prevented from coming off by a set screw 20. That is, the steel ball 18 is pressed against the inclined surface 15 by the elastic force of the elastic member 19, and as a result, the holder 12 is pressed rearward in the axial direction. Further, a fine adjustment screw 21 is screwed into a female thread 16 formed at the rear end of the holder 12. As shown in the figure, the fine adjustment screw 21 has a hexagonal cross-section at the operating section at the rear end, and a flange 22 is provided immediately after the threaded part that is screwed into the female thread 16 of the holder 12. The screw 21 is attached to the flange 22
The flange 22 is attached to the main body 13 by being fitted into a counterbore formed in the main body 13, and by pressing the flange 22 into the counterbore by a plate 23 attached to the outer surface of the main body 13. That is, the fine adjustment screw 21 is attached to the main body 13 in a state where it can rotate freely and is prevented from moving in the axial direction.
The plate 23 receives a pressing force in the axial direction via the plate 23.

Therefore, in the above cutting tool holder, when the fine adjustment screw 21 is rotated, the holder 12 is moved in the axial direction by the action of the screw, and the position of the cutting edge can be adjusted. In that case, the fine adjustment screw 21 is rotated while measuring the position of the cutting edge by applying a setting gauge (not shown) to the cutting edge 11.
Since the setting gauge is located at the rear end, the setting gauge does not become an obstacle and fine adjustment operations can be easily performed. In addition, in the above tool holder, the elastic member 1
Since the elastic force of 9 is applied in the axial direction of the holder 12 via the steel balls 18 and the inclined surface 15,
Fine adjustment screw 21 and female screw 1 screwed together
6 can be eliminated. Moreover, the backlash removal mechanism is constructed using a shaft portion 14 for holding the holder 12 on the main body 13, and the steel balls 18 and the elastic member 19 are arranged in a direction perpendicular to the shaft portion 14. Therefore, the total length can be shortened.

In the above embodiment, the holder 12 is always pressed rearward in the axial direction to eliminate backlash, but this invention may be configured to be pressed forward in the axial direction.

Effects of the invention As is clear from the above explanation, according to this invention, the fine adjustment screw that changes the position of the cutting edge is provided at the rear end opposite to the cutting edge, so the setting gauge that measures the position of the cutting edge can be used to finely adjust the position of the cutting edge. There is no obstacle when turning the adjustment screw, and therefore operability can be improved. In addition, since the configuration is such that the pressing member is elastically pressed against the inclined surface formed on the outside of the holder to apply an axial force to the holder to remove crushing, the shaft portion that holds the holder against the main body is used. In addition, since the internal thread of the shaft part is formed with a female thread and the male thread part of the fine adjustment screw is screwed into this, the inside of the shaft part of the holder can be configured in the axial direction. It can be used as part of a mechanism for adjusting the position of the device, and therefore the overall length can be shortened and the device can be made compact.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of this invention, FIG. 2 is a plan view thereof, and FIG. 3 is a plan view showing an example of a conventional finely adjustable tool holder. DESCRIPTION OF SYMBOLS 11... Cutting blade, 12... Holder, 13... Main body, 14... Shaft part, 15... Inclined surface, 16... Female screw, 18... Steel ball, 19... Elastic member, 21...
...Fine adjustment screw.

Claims (1)

[Scope of utility model registration request] A holder with a cutting blade attached to the tip has a shaft part that is tightly fitted into the main body for attaching to a machine such as a tool rest so that it can be inserted and withdrawn freely, and a holder with a cutting blade attached to the rear end of the shaft part along the axial direction. A fine adjustment screw having a female thread formed therein and a male thread screwed into the female thread is attached to the main body so as to be rotatable and prevented from moving in the axial direction, An inclined surface is formed on the outer side of the shaft part fitted to the holder, and a pressing member is elastically pressed against the inclined surface from a direction perpendicular to the axis of the holder to press the holder in the axial direction. A finely adjustable tool holder that is built into the main body.