JPS6338972Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a cutting tool for end face grooving, and in particular improves the cutting performance by increasing the tool rigidity, and also ensures a considerable range of grooving diameter and width. It has been made possible.

Conventionally, this type of end face grooving has normally been carried out by feeding a grooving tool in the axial direction toward the workpiece.

Therefore, the tool rigidity of the grooving tool is not necessarily high, so the cutting performance is not sufficient, and the grooving diameter cannot be accurately determined.

For these reasons, there is a need for the development of an adjustable cutting tool that has high tool rigidity and that allows the grooving diameter and width to be accurately determined over a considerable range.

The present invention was developed in view of the above points, and the large-diameter cutting head provided at one end of the holder is provided with a notch step consisting of one side wall, a rear wall, and a bottom surface. , a cutting tool for end face grooving in which a blade equipped with a cutting edge tip for grooving is fixed by a tightening bolt, and the tool rigidity is increased due to the presence of the cutting head; To provide a cutting tool for end face grooving, in which the grooving diameter and width of the cutting tip provided on the blade are ensured over a considerable range.

Hereinafter, one embodiment of the cutting tool for end face grooving of the present invention will be described with reference to the drawings.

In FIGS. 1 to 3, reference numeral 1 denotes a cylindrical holder, and a large-diameter cutting head 2 is provided at one end of the holder.

The cutting head 2 is provided with a step 3, and a blade 5 having a cutting tip 4 is disposed within the step 3. in this case,
The cutout step portion 3 consists of one side wall 6, a rear wall 7, and a bottom surface 8, and the bottom surface 8 along the rear wall 7 includes:
A diametrical guide groove 9 is provided. This guide groove 9 is for guiding the lower protrusion 10 of the blade 5, thereby restricting movement in the axial direction.

Furthermore, an adjusting screw 11 is provided on the side wall 6 of the notch step 3 so as to protrude, and the protruding end of the adjusting screw 11 is brought into contact with the blade 5. On the other hand,
An elongated hole 12 provided approximately in the center of the bottom surface 8 of the notch step portion 3 and a diametrically elongated groove 1 connected to the elongated hole 12
3. Furthermore, a nut 16 is provided in the long groove 13 and is screwed into the threaded portion 15 of the tightening bolt 14.
By providing this, the amount of movement of the adjusting screw 11 is ensured. This amount of movement can be easily set or read by, for example, marking a scale 17 on the top surface of the cutting head 2.

The blade 5 configured in this manner is provided with a tip seat 18 at its end, and this tip seat 18 is provided at the end thereof.
8, the cutting tip 4 is adapted to be received therein. The cutting tip 4 is shown fixed by, for example, a holding plate 19 and a tightening screw 20, and its cutting edge 21 protrudes from the axial tip to enable end face grooving. There is. In this case, in order to eliminate movement of the cutting blade tip 4 in the radial direction, the bottom surface of the chip seat 18 is made into a V-shaped concave surface, and the bottom surface of the cutting blade tip 4 in contrast to this is made into a V-shaped convex surface.

Regarding the cutting edge tip 4, for example, as shown in Japanese Patent Publication No. 57-25321, a central notch (not shown) may be formed in the center of the cutting edge 21 to improve chip disposal. You can also do it. Therefore, in addition to this central notch (not shown), a concave chip breaker groove (not shown) along the edge of the cutting edge may also be formed.

Further, FIG. 4 shows an example in which a substantially triangular plate-shaped throw-away tip having a central mounting hole 22 is provided as the cutting blade tip 4. In this case, by utilizing the central mounting hole 22, for example, a stopper It is fixed by screws 23.

The cutting tool for end face grooving of the present invention configured in this way has the following effects.

First, the tool has high rigidity and stable cutting is possible. This is the cutting head 2 of holder 1.
This is because, since the blade 5 is directly attached to the blade 5, it can sufficiently withstand cutting resistance and ensure stable cutting.

Second, the groove diameter can be adjusted over a considerable range. This is because the adjustment screw 11, elongated hole 12, elongated groove 13, and nut 16 function to adjust the position of the blade 5. Also, by preparing several types of blades 5 with different lengths, the adjustment range can be expanded. This is because it will be done. For example, when the diameter of the cutting head 2 is 80 mm, the grooving diameter D can be adjusted by preparing three or four types of blades 5.
Can be applied to a length of about 30 to 80 mm.

Thirdly, it can adequately handle the grooving width. This is because the cutting blade tip 4 having the necessary grooving width W of the cutting blade tip 4 may be prepared in advance.

As explained above, the present invention incorporates a position-adjustable blade into the cutting head so that end face grooving can be performed using the cutting tip provided on this blade, which improves tool rigidity. Effective cutting performance can be expected because the
It has the advantage that the grooving diameter and grooving width can be secured within a considerable range.

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of the cutting tool for end face grooving of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a partial bottom view, and FIG. 4 is a modified example. FIG. 1... Holder, 2... Cutting head, 3... Notch step, 4... Cutting blade tip, 5... Blade, 9...
... Guide groove, 10 ... Lower projection, 11 ... Adjustment screw, 12 ... Long hole, 13 ... Long groove, 14 ... Tightening bolt, 16 ... Nut, 18 ... Chip seat,
21... Cutting edge.

Claims (1)

[Claims for Utility Model Registration] A large-diameter cutting head 2 provided at one end of the holder 1 is provided with a cutout step 3 consisting of a side wall 6, a rear wall 7, and a bottom surface 8. In the section 3, a blade 5 with a cutting tip 4 for grooving is provided.
It is a cutting tool for end face grooving which is fixed by a tightening bolt 14, and the blade 5 has a lower protrusion 10 that is connected to a diametrical guide groove formed on the bottom surface 8 of the notch step 3. 9, the axial movement is restricted by being guided by the adjustment screw 11, which is provided protruding from the side wall 6 of the notch step 3, the elongated hole 12 provided in the bottom surface 8 of the notch step 3, and A diametrical long groove 13 connected thereto, and a nut 16 disposed within the long groove 13 and screwed onto the tightening bolt 14 enable the diametrical position adjustment. A cutting tool for end face grooving, characterized in that the chip 4 is incorporated in the chip seat 18 of the blade 5 so that its cutting ridge end 21 protrudes toward the axial tip.