JPH0478373B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present application relates to a method for manufacturing a round-blade cutter having a cutting edge on its outer periphery.

(Conventional technology) In recent years, cutting has become more and more difficult due to the increasing hardness and diversification of workpieces, faster cutting speeds, and high precision machinability.
Due to requirements such as long life, products containing expensive metal elements such as Co.VWTi., or products manufactured using special manufacturing methods such as powder sintering, etc.
Cutlery steel, which is extremely expensive, has come into use. When using these expensive cutlery steels, it is clearly economical and resource-saving to use them in solid form like conventional, relatively inexpensive cutlery steels. However, it is expected that these problems can be solved by creating a composite material in combination with cheap and easily workable soft steel.

However, even in these conventional composite materials, as shown in FIG.
Furthermore, problems such as material loss during the manufacturing process and distortion due to thermal deformation have not been completely resolved.

The present application relates to an economical and easy manufacturing method for a round-blade cutter in which expensive cutter steel is used only in necessary portions of the cutting edge.

(Means for solving the problem) In other words, the expensive composite material 3 of cutter steel that will become the cutting edge is locally joined to the base material 2 of cheap and easy-to-work soft steel that will serve as the support base. A rectangular band-shaped composite material 1 is obtained by a known rolling method or the like. In addition, the rectangular band-shaped composite material 1 obtained here has a single-edged round blade cutter with a single-edged structure (Fig. 1), and a double-edged cutter with a fixed three-layered structure (Fig. 1). (Fig. 2) Also, for those with shearing blades (for example, blades for sleeters), a three-layer structure with double-sided tidying (Fig. 3) can be selected.

Next, this rectangular band-shaped composite material 1 is bent into a ring shape so that the plywood 3 serving as the cutting edge is on the outside, and the butted ends 4 are welded together by welding or the like to form a ring-shaped composite material 6. After that, the internal void 7 is circumferentially welded 9 with a disc material 8 of the same quality as the base material 2, and the integrated disc-shaped composite material 10 is subjected to desired heat treatment, cutting process, etc. to form a round blade cutter. This is what you get.

(Functions and Effects) According to this method, first of all, the rectangular band-shaped composite material is bent into a ring shape to form the cutting edge. Therefore, it is possible to obtain a product with high efficiency. In other words, the method of obtaining suitable disc-shaped material from plate material solves the problem of unavoidable loss of expensive cutlery steel, makes it possible to sufficiently reduce costs and save resources, and also allows for the production of solid wood. Bending, which is difficult to do with steel for cutlery, can be easily accomplished by processing a composite material with a base material of soft steel, which has good workability.

As described above, we believe that the round-blade cutter obtained by the method of the present invention can sufficiently reduce costs and save resources, especially when expensive cutter steel is used to meet the harsh cutting conditions of recent years. It is.

[Brief explanation of drawings]

FIG. 1 is a manufacturing process diagram of a round blade cutter according to the method of the present invention. FIG. 2 is a perspective view of a rectangular band-shaped composite material with a three-layer structure. FIG. 3 is a perspective view of a rectangular band-shaped composite material having a three-layer structure with both sides arranged. FIG. 4 is a partially sectional perspective view of a round blade cutter obtained by the method of the present invention. FIG. 5 is a partially sectional perspective view of a conventional round blade cutter made of composite material. 1... Rectangular band-shaped composite material (separated two-layer structure), 2...
...Base material (soft steel), 3... Composite material (steel for cutlery), 4...
...Butt end, 5... Welded part, 6... Ring-shaped composite material, 7... Internal hollow, 8... Disc material, 9...
...Circumferential welded part, 10...Disc-shaped composite material.

Claims (1)

[Claims] 1. A ring-shaped composite material in which a rectangular band-shaped composite material is locally joined to a soft base material using cutlery steel as a composite material, bent into a ring shape, and the abutted portions are welded. A method for manufacturing a round-blade cutter, characterized in that the material is a disc-shaped composite material in which a disc material of the same quality as the base material is circumferentially welded into an internal cavity. 2. The method for manufacturing a round blade cutter according to claim 1, wherein the rectangular band-shaped composite material has a tidied two-layer structure. 3. The method for manufacturing a round blade cutter according to claim 1, wherein the rectangular band-shaped composite material has a three-layer structure. 4. The method for manufacturing a round blade cutter according to claim 1, wherein the rectangular band-shaped composite material has a three-layer structure with double-sided tidying.