JPH0663221U - Throw-away cutter - Google Patents

Abstract

(57) [Abstract] [Purpose] In a throw-away type cutter in which a chip having a mounting hole is mounted with a screw, the contact position between the cutting edge and the work piece can be shifted to allow for effective use of the cutting edge. . [Structure] Two screw holes are provided in the tip seat 4 of the cutter body 1. When the throw-away tip 2 is screwed into the main body 1 by the screw 3 to be mounted, the contact position between the cutting edge and the workpiece can be shifted by properly using the two screw holes.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a throw-away type cutter, and is particularly suitable for chamfering.

[0002]

[Prior art]

 Conventionally, the throw-away type cutter for chamfering as described above has one screw hole on the tip seat, so that the throw-away tip is mounted at a fixed position when assembled in the cutter.

[0003]

[Problems to be solved by the device]

 However, when chamfering is performed using such a throw-away type cutter, unless a position adjustment is performed on the machine tool side or the holder side of the cutter, a throw-away tip will be used for a workpiece of a certain shape. The contact position of the work piece is constant. For this reason, it cannot be said that the use location of the cutting edge of the chip is fixed and the cutting edge length is effectively used.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problem, the present invention has two screw holes formed in the tip seat so that the throw-away tip can be mounted by shifting the mounting position.

[0005]

[Action]

 By using two screw holes properly, one cutting edge of the throw-away tip can be shifted on the same line.

[0006]

Embodiment 1 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a front view of a throwaway type chamfering cutter with a handle according to the present invention, and FIG. 2A is an enlarged view of its one-chip seat. Now, the throw-away tip 2 having a square shape and a positive clearance angle is attached to one of the two screw holes provided in the main body 1 by the screw 3. The positional relationship between the chip 2 and the workpiece 5 is as shown in the figure. FIG. 2B is a diagram showing a state in which it is mounted in the other one of the two screw holes, and the positional relationship between the tip 2 and the workpiece 5 is as shown in the diagram.

As a result, the contact position between the workpiece and the cutting edge is displaced in FIGS. 2A and 2B, and in this embodiment, a total of eight cutting edges can be used due to the corner change. It becomes Noh. This means that the number of used cutting edges has doubled compared to the conventional four cutting edges.

FIG. 3 shows another embodiment using an equilateral triangular tip, and thus the present invention can be applied to a throw-away tip having a polygonal plate.

[0010]

[Effect of device]

 When chamfering is performed using the throw-away type cutter, the contact position between the work piece and the cutting edge can be easily displaced without adjusting the position on the machine tool side or the holder side of the cutter. As a result, the number of used cutting edges can be increased, and the cutting edges can be effectively used.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is an enlarged view of the one-chip seat in FIG. 1, and FIGS. 2A and 2B are explanatory views showing a relationship between contact positions of a throw-away tip and a workpiece.

FIG. 3 is an enlarged view of a one-chip seat according to another embodiment of the present invention.

[Explanation of symbols]

 1 Body 2 Throw-away tip 3 Screw 4 Tip seat 5 Workpiece

Claims (1)

[Scope of utility model registration request] 1. A throw-away type cutter in which a throw-away tip having a mounting hole is screwed in a tip seat of a cutter body, wherein a screw hole formed in the tip seat is A throw-away type cutter that is provided at two places so that the mounting position can be shifted.