JPH05123901A - Part machining method - Google Patents

Abstract

PURPOSE:To provide a part machining method in which a cutting tool having an optimum edge shape according to the machining portion of a part is used. CONSTITUTION:In the machining of a part (roller 2) comprising layered different materials (metal and synthetic resin or the like), the part 2 is machined into a predetermined shape with a plurality of cutting tools 12 and 14 having respective cutting ranges according to the material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing parts such as guide rollers having a layered structure made of synthetic resin and metal.

[0002]

2. Description of the Related Art Generally, in a video tape recorder, a video camera or the like, a guide roller for guiding the running of a magnetic tape as a recording medium is made of stainless steel or the like in a cylindrical bearing portion made of synthetic resin. A roller covered with a metal tube is used, and the end surface of the roller is surface-treated with a cutting tool.

FIG. 3 shows a method of processing such a roller end surface. As shown in FIG. 3A, in the roller 2, a cylindrical metal cylinder 6 slightly shorter than the bearing portion 4 is covered on the peripheral surface portion of a cylindrical bearing portion 4 made of synthetic resin. Is. A bite 8 is installed as a means for machining the end face of the roller 2 while rotating the roller 2, and the bite 8 has blades 8a, 8b, 8c for partially machining predetermined locations.
A shaped tool formed continuously is used.

As shown in FIG. 3B, this byte 8
Is applied to a predetermined position on the end surface of the roller 2, which is a rotating workpiece, and is fed to the end surface of the roller 2 by a predetermined amount. As a result, as shown in FIG.
Blades 8a, 8b, 8c of the cutting tool 8 as shown in (C) of FIG.
Depending on the shape and the amount of feed, the end surface processed surface 10a of the metal cylinder 6 by the blade 8a, the annular groove portion 10b, the bearing portion 4
The concavity 10c having a conical shape with the center of the apex as the apex can be formed by a single processing process.

[0005]

By the way, in the cutting tool 8 used for processing the end surface of the roller 2 having such a two-layer structure of metal and synthetic resin, as shown in FIG. , 8b, 8c, metal processing at D ₁ part,
Synthetic resin processing is performed in the portion D ₂ . That is, in the processing of metal and the processing of resin, the materials to be processed have different physical properties such as hardness and stickiness, and the shapes of the blades 8a, 8b, and 8c are different between the blades 8a and 8b and 8c. The degrees are naturally different. However, the cutting tool 8 has a blade 8a,
If 8b and 8c are formed continuously, the life of the cutting tool 8 will depend on the part that wears the fastest,
Byte 8 must be replaced even if other parts are available.

The cause of the different wear due to the different materials is due to the shapes of the blades 8a, 8b and 8c.
The cutting tool 8 having a plurality of blades 8a, 8b, 8c integrally cannot make a blade shape most suitable for the material.

[0007] Therefore, an object of the present invention is to provide a machining method for a component that uses a cutting tool having an optimum blade shape according to the machining location of the component.

[0008]

A method of machining a component according to the present invention is a method of machining a component (roller 2) having a layered structure made of different materials (metal and synthetic resin, etc.). It is characterized in that the parts are processed into a predetermined shape with the cutting tools (12, 14).

[0009]

Since the parts are machined by using a plurality of cutting tools each having a cutting range for each material of the parts, it is possible to machine the parts having the optimum blade shape corresponding to the material. When the degree of wear differs depending on the material, the unusable bite can be selectively replaced, and optimum processing can always be performed.

[0010]

1 and 2 show a method of processing a component according to the present invention. As shown in FIGS. 1 and 2A, a roller 2 is used as a part to be processed, and the roller 2 has a cylindrical bearing portion 4 formed of synthetic resin on a peripheral surface portion thereof. A cylindrical metal cylinder 6 is covered with a part thereof exposed.

The first and second cutting tools 12 and 14 are used as a plurality of cutting tools having a blade shape corresponding to the processed shape of the end surface of the roller 2. The cutting tool 12 has a bearing part 4 which is a synthetic resin part of the roller 2 as a cutting range, and the cutting tool 14 has a metal tube 6 which is a metal part of the roller 2 as a cutting range. Therefore, the cutting tool 12 is formed with a blade 12a having a rectangular cross section and a blade 12b having a triangular cross section corresponding to the processed end surface shape of the bearing portion 4. These blades 12
The most optimal blade shape corresponding to the processing of the synthetic resin, for example, the blade edge angle and the clearance angle are set in a and 12b. Further, the blade 14a of the cutting tool 14 is also set with a blade shape most suitable for metal working, such as a cutting edge angle and a clearance angle.

Then, the respective cutting tools 12, 14 are individually fixed to the tool rest, and as shown in FIG. 1 (B), they are moved to the end surface of the rotating roller 2 in the direction indicated by the arrow X so as to be predetermined. Press only the feed amount. Then, the cutting tool 14 is moved in the direction indicated by the arrow Y, and the end face of the metal cylinder 6 is cut with the cutting edge thereof.

By such a cutting process, FIG.
As shown in FIG. 5, the bearing portion 4 is formed with a groove portion 16a having an annular shape by the blade 12a of the cutting tool 12, and
Conical recess 16b formed by the blade 12b of the cutting tool 12
Is formed. In addition, the end surface of the metal cylinder 6 has a bite 14
Precision processing is performed by the blade 14a.

In the embodiment, the roller made of synthetic resin and metal is taken as an example of the workpiece made of a plurality of materials, but the present invention has a plurality of layer structures other than the synthetic resin and the metal. It can also be applied to the processing of a work piece.

[0015]

As described above, according to the present invention, since parts are machined by using a plurality of cutting tools having optimum blade shapes according to the processing locations of the parts, wear of the cutting tools can be suppressed and The machining accuracy can be improved and the unusable bite can be selectively replaced depending on the wear degree of each bite, so that the optimum machining can always be performed to improve the machining efficiency. The cost can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a method of processing a component of the present invention.

FIG. 2 is a perspective view showing a roller as a workpiece for carrying out the method for machining a component of the present invention and a roller after machining.

FIG. 3 is a cross-sectional view showing a conventional method of processing a component.

[Explanation of symbols]

 2 ... Roller 4 ... Bearing (synthetic resin) 6 ... Metal cylinder (metal) 12, 14 ... Bit 12a, 12b, 14a ... Blade

Claims (1)

[Claims] 1. A method of processing a component having a layered structure of different materials, wherein the component is processed into a predetermined shape with a plurality of cutting tools each having a cutting range for each material.