JPS6325890B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing a wire-cut electric discharge plate processed product, and more specifically, a method for manufacturing a plate made of steel or the like by wire-cut electric discharge into a desired product, such as a press mold. This invention relates to a method for manufacturing plate processed products such as punches and dies.

(Conventional technology) Conventionally, the manufacturing method for this type of plate processed product is to first cut a material made of special steel such as tool steel, then perform rough processing (six-sided processing), and then polish and drill holes. There is a method for manufacturing plate processed products in which the plate is processed and finished by polishing using a contact machine or milling cutter, then heat treated (quenched) in a heat treatment furnace, and finally final finishing is performed to produce a product.

(Problems to be solved by the invention) However, in this conventional manufacturing method,
Since the plate to be machined is made of special steel such as tool steel, once heat treatment (quenching) is performed, the hardness of the plate increases, and machining operations such as tapping and drilling cannot be performed after the heat treatment. figure,
Therefore, in this method, all processing operations such as tapping and drilling must be performed before heat treatment.

However, if machining work has to be performed before heat treatment, taps and holes will be identified in predetermined shapes and positions, and as a result, the position of the taps may be arbitrarily changed after heat treatment, or deformed parts may be processed. It had the fatal flaw of not being able to do anything.

Furthermore, since the plate is made of a single piece such as tool steel,
The problem was that the material was expensive, and as a result, the thicker the plate as a whole, the more expensive it became.

In any case, since conventional plate processing products of this type, such as punches and dies for press processing molds, are made of special steel such as tool steel, processing such as taps must be performed before heat treatment, and as a result, after heat treatment The use of the plate was severely restricted because it was not possible to change the tap position or deform the plate.

In addition, instead of machining a single plate like this, there is a method of machining two plates made of different materials at the same time, such as in Japanese Patent Application Laid-Open No. 10196/1983, but this method is only a method of machining two plates made of different materials at the same time. This method involves wire-cut electrical discharge machining by stacking separate plates, and is not intended for deforming or desired machining after heat treatment of special steel.
This does not solve the problems of the prior art described above.

The present invention has been made to solve these problems, and allows processing operations such as tapping and drilling to be performed arbitrarily after the heat treatment process, and the positions of the taps, etc. can be set arbitrarily without having to be set in advance. The purpose of the present invention is to make it possible to process the plate into any desired shape by effectively utilizing the taps, to simplify the entire manufacturing process, and to reduce costs.

(Means for Solving the Problems) In order to achieve the above object, the present invention is a method in which the above-mentioned conventional method is a method of processing a single plate, or a state in which two separate plates are overlapped. This method was created based on the idea of processing a single plate that integrates two different materials, in view of the problems mentioned above. A means to solve this problem is to integrate a base material made of ordinary steel with a surface material made of special steel such as high-speed steel, which is harder than the base material and made very thin. A plate formed of two layers, a material and a base material, is heat-treated, then tapping, drilling, etc. are performed on the material side of the plate, and then a starting point hole is drilled in the plate using a wire cut electric discharge machine. Then, the plate is processed into a desired shape from the tart point hole and manufactured into a product.

(Function) In other words, since the plate is composed of two layers: a base material and a surface material made of special steel that is harder than the base material, when this plate is heat treated, the hardness of the surface material increases. However, since one material side is made of ordinary steel (SS), tap on the base material side,
Since processing such as drilling can be performed arbitrarily and deformably after heat treatment, the use of plate processed products has become extremely easy.

(Example) Hereinafter, embodiments of the present invention will be described according to an example shown in the drawings.

First, as shown in Fig. 1, a base material 1 made of ordinary steel, such as general structural steel (JIS standard, SS), etc., and a surface of the base material 1, which is very thinner than the base material 1 (this example In this case, the surface material 2 is made of special steel such as high-speed steel (JIS standard, SKH), alloy tool steel (JIS standard, SKS, SKD-11), cemented carbide, etc. formed on the base material 1 (1/4). are integrally provided by means such as friction welding to form the plate 3, and then this plate 3
be heat treated in advance.

After that, processing such as tapping and drilling is performed on the base material 1 of the plate 3, and a starting point hole 4 is made in the plate 3 using a wire cut electric discharge machine,
When cutting is performed from the starting point hole 4 according to the program, the desired plate product can be obtained immediately.

That is, the plate 3 as described above can be used, for example, as a die holder 5 of a die set as shown in FIG.
A die 7 is mounted on the die plate 6 via a die plate 6.
The punch holder 8 of the same die set can be processed into a desired shape by hollowing out approximately the center.
A punch 10 attached to the side via a punch backing plate 9 is processed into a desired shape that matches the hollowed out portion of the die 7.

In the method for manufacturing plate processed products as described above, the hardness of the surface material 2 side of the plate 3 is increased by heat treatment, but since the base material 1 side is made of ordinary steel, taps and holes are formed on the base material 1 side after heat treatment. This makes it possible to perform processing such as drilling as desired.
Therefore, the positions of the taps, etc. are not set in advance, but just before processing the plate 3, taps, etc. are placed on the base material 1 side of the plate 3 according to the desired shape of the product to be processed, such as the die 7 and the punch 10. can be formed arbitrarily.

Therefore, when using a die or a punch, a unique function and effect can be obtained in which processing such as tapping or drilling can be performed depending on the processing purpose, and deformation processing can be performed depending on the product.

In addition, since the plate 3 is heat-treated before processing operations such as tapping and drilling, there is no need for a heat treatment process after processing the plate 3, and the processing time until commercialization can be significantly shortened. This makes it possible to significantly reduce costs.

Note that the materials of the base material 1 and the face material 2 are not limited to those in the above embodiments, but the point is that the base material 1 is made of ordinary steel, and the face material 2 is made of special steel that is harder than the base material 1. It is sufficient if it is configured.

Further, the number of starting point holes 4 formed on the plate is not limited to one as in the embodiment, but is essentially at least one.
It is sufficient if at least one hole is provided.

Further, when the plate 3 is cylindrical as shown in FIG. 4, forming reference planes in the X and Y directions has the advantage that the cutting operation for wire cut discharge can be performed extremely easily.

Further, the type of processed product is not limited to dies and punches as in the above embodiments, and the plate 3 can be processed into products of any shape.

(Effects of the Invention) (a) As mentioned above, the present invention consists of a plate to be machined in two layers: a base material made of ordinary steel and a surface material made of special steel whose hardness is greater than that of the base material. Because of this structure, processing such as tapping and drilling can be performed more freely on the base material side made of ordinary steel after heat treatment, compared to the conventional case where it is made of special steel alone.
The positions of the taps, etc. are not set in advance, and when fixing the plate during processing, the positions of the taps, etc., and the position where the plate is fixed, or according to the desired shape of the product to be processed. A particularly remarkable and unique effect, which was completely unprecedented, was obtained in that it could be formed or deformed as desired.

As a result, there is a practical advantage that the heat-treated plate can be processed into any desired shape, such as a deformed and complicated shape.

(b) In addition, since it is a method of heat treatment before processing such as tapping and drilling, there is no need for the heat treatment process after processing as in the past, and the processing time until commercialization can be significantly shortened. This has the effect of significantly reducing costs.

(c) Furthermore, the expensive special steel that forms the plate is
Since it can be used only on the surface material side in a very thin state, the cost of the entire plate does not increase, and it has the advantage of providing a processed product that is much more economical than conventional single plates.

(d) In any case, in the past, even if the plate to be machined was a single piece of special steel such as tool steel, or if two plates of different materials were used as in JP-A No. 53-10196, Separate 2
Since this method involves stacking two plates together only during processing, it was not possible to deal with processing problems such as tapping and drilling after heat treatment of the plates. Since this is a method for processing only one plate, the hardness of the surface material increases after heat treatment, but since the base material is made of ordinary steel, it can be processed in any desired and deformable manner. It was effective.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the plate forming process, Figure 2 is a perspective view showing the plate forming process;
The figure is a perspective view of the starting point hole drilling process, Figure 3 shows how the die and punch are used as an example of a processed product, A is a schematic side view, and B is a plan view as seen from direction A in A. , FIG. 4 is a perspective view of another embodiment. 1...Base material, 2...Front material, 3...Plate, 4...Start point hole.

Claims (1)

[Claims] 1 A base material 1 made of ordinary steel is joined and integrated with a face material 2 made of special steel such as high-speed steel, which is harder than the base material 1 and is formed to be very thin, so that the face material 2 and the above-mentioned The plate 3 formed in two layers with the base material 1 is heat-treated, and then the base material 1 side of the plate 3 is processed by tapping, drilling, etc. After that, the plate 3 is heated using a wire cut electric discharge machine. A method for producing a wire-cut electrical discharge plate processed product, characterized in that a starting point hole 4 is drilled, and the plate 3 is processed into a desired shape from the starting point hole 4 to produce a product.