JPH05253731A - Tip for cutter and cutter incorporating tip - Google Patents

Abstract

PURPOSE:To prevent a cutter from springing out during its high-speed operation by forming a tip for cutter to a rectangular plate shape and carrying out fixation by utilizing the screw fitting at the parallel plane part having an installation hole, while by using a wedge piece at a push pressure receiving surface part. CONSTITUTION:A tip 1 for cutter has a rectangular plate shape. On one side of the rectangular face, a flat surface 2 is formed which constitutes a cutting face in cutting out of about half the rectangular face and has an installation hole, and a pressure receiving surface 3 which inclines is formed on about the other half the rectangular face. A cutter in which the tip 1 is incorporated is screwed and wedged by utilizing the installation hole 5 and the push pressure receiving surface 3. In this case, the push pressure receiving surface 3 possesses the function for preventing the springing-out because of the formation of the inclined surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tip for a cutter and a cutter incorporating the same, and is particularly suitable for high speed cutting.

[0002]

2. Description of the Related Art Conventionally, a cutter that has been used for cutting in which the number of rotations of the main shaft exceeds 20,000 rotations is generally a brazing type cutter, and a throwaway type cutter is used only partially. It has not been.

[0003]

By the way, recently,
The economical use of tools requires the use of throw-away type cutters. However, the conventional throw-away type cutter has a problem that the cutting edge tip may fly out of the mounting groove due to the centrifugal force generated during high-speed rotation.

In view of the above, the present invention intends to provide a cutter tip for preventing the protrusion due to centrifugal force and a cutter incorporating the same.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned points, and a tip for a cutter has a rectangular plate shape, and one of the rectangular surfaces has a half of the cut surface. A parallel flat surface with a mounting hole that forms a rake surface is formed, and a pressing receiving surface that is inclined in the remaining approximately half is formed.

A cutter incorporating a tip for this cutter utilizes the mounting hole and the pressure receiving surface,
It is designed to be screwed and wedged.

[0007]

Since the cutter tip of the present invention is fixed by two means of screwing and wedge fixing, the attachment strength is high, and the pressing receiving surface is formed as an inclined surface, so that it can be prevented from popping out. It has a function. That is, if the cutter tip is incorporated into the tool body, the cutter tip can be prevented from popping out even if a large centrifugal force is applied by high-speed rotation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tip for a cutter of the present invention and a cutter incorporating the same will be described below with reference to the drawings.

In FIG. 1, 1 is a tip for a cutter having a substantially rectangular plate shape, and one of the rectangular surfaces is
A parallel plane 2 and an inclined pressure receiving surface 3 are formed respectively. In this case, the parallel plane 2 has a mounting hole 5 for the set screw 4, and the pressing receiving surface 3
Is to be pressed by the wedge piece 6. Then, the outer edge of the parallel plane 2 forms a cutting edge 2a on the front side and a cutting edge 2b on the outer peripheral side.

2 and 3 show a cutter 7 in which the above-mentioned cutter tip 1 is incorporated. That is, the tip 1 for the cutter is positioned in the mounting groove 9 of the tool main body 8 so that when the pressing receiving surface 3 is fixed by the wedge piece 6, the thickness becomes toward the groove bottom, Prevents jumping out due to force. The wedge piece 6 is fixed by providing the tightening screw 10. However, as shown in FIG. 4, it is more effective if the wedge piece 6 is provided with a set screw 11 for preventing the wedge piece 6 from popping out. is there.

[0011]

As described above, according to the present invention, the cutter tip 1 is formed into a rectangular plate shape, and the parallel flat surface 2 portion having the mounting hole 5 is set by the set screw 4, and the press receiving surface 3 portion is formed. Since it is fixed by the wedge piece 6, it is securely fixed by the two fixing means. Then, when the cutter 10 rotates at a high speed, the effect of preventing popping out is obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a tip for a cutter of the present invention.

FIG. 2 is a front view showing an embodiment of the cutter of the present invention.

FIG. 3 is a partial plan view.

FIG. 4 is a partial plan view showing another embodiment.

[Explanation of symbols]

 1 Tip for cutter 2 Parallel plane 2a Cutting edge ridge on the front side 2b Cutting edge ridge on the outer peripheral side 3 Press receiving surface 4 Set screw 5 Mounting hole 6 Wedge piece 7 Cutter 8 Tool body 9 Mounting groove 10 Tightening screw 11 Set screw

Claims (2)

[Claims] 1. A substantially rectangular plate-like shape, one side of which has a parallel plane 2 with a mounting hole 5 which constitutes a rake surface for cutting in approximately half of the rectangular plane, and in the remaining approximately half,
A cutter tip characterized in that an inclined pressure receiving surface 3 is formed which becomes thicker from the parallel plane 2 toward the other end side. 2. A tip 1 for a cutter according to claim 1 is arranged in a mounting groove 9 of a tool body 8 and fixed by a set screw 4 for the mounting hole 5 and a wedge piece 6 for the pressure receiving surface 3. Cutter that was made to do.