Method for production of puncheons for pressing cup-type items

FIELD: technological processes.

SUBSTANCE: half-finished product with business end is obtained from workpiece and processed. It undergoes thermal processing and polishing. Then cog profile is worked out by method of electroerosion on the lateral surface of business end of half-finished product.

EFFECT: improved quality of obtained item.

3 dwg

 

The invention relates to the processing of metals by pressure and can be used for the manufacture of punches extrusion product type glass having a toothed profile in the inner cavity, such as buildings shrapnel ammunition.

A known method of manufacture of forging dies for extrusion products type glass inner toothed profile (see patent RU 2080550 C1, F42B 12/24, 27.05.1997,).

However, the known method does not provide the manufacture of the toothed profile of the tool is of good quality, because its manufacture is made by milling and due to the low roughness of the tooth surface during extrusion products have significant specific efforts, which reduces the resistance of the punch and the quality of the gear profile.

Application after milling grinding toothed profile of the punch is difficult due to possible differences in the angular divergence of the teeth during processing even in the centres, but also because of the small size of teeth, size "L" and radius "R" (figure 2).

Task to be solved by the present invention is directed, is to eliminate these shortcomings.

This is achieved by a method for manufacturing of forging dies for extrusion products type of glass with an inner toothed profile includes the segment of the workpiece, obtaining a semi-finished product, with working parts, it is the processing, heat treatment, grinding semi-finished and further forming on the side of the working part of the gear profile by the method of electric discharge machining.

A significant sign of "... the subsequent formation on the side of it (punch) working part serrated profile by the method of electric discharge machining allows you to provide the technical result increased operational qualities of a punch for manufacturing toothed profile with high purity processing, the accuracy of the angular positioning of the teeth, reduction of specific efforts during extrusion products of type a glass of obtaining high-quality toothed profile of the products and increase tool life.

The ability to achieve a technical result - the quality of manufacture of the toothed profile of the punch with high purity processing - see the book "Dimensional electrical processing of materials", edited by Awholesale, Moscow Higher school", 1978, p.69, 15th row from the top "...it is possible to ensure high precision machining", p.70, 5th line from the bottom "... providing high quality machined surfaces".

The toothed profile of the punch is made on Japanese equipment - coordinate-bonding wire EDM installation CNC SODICK company - technical specifications are attached.

The increment angle- 0,00833...° (20")Angular accuracy- 30"Precision machining -within 7-10 mm to 300 mm stroke axial feedThe best surface roughness processingto 0.025 m Ra (class 12)

Figure 1 shows the punch, the method of manufacture of which is described in the present invention,

figure 2 - node 1 in figure 1;

figure 3 is a view As in figure 2.

The method is as follows.

Cut from rod billet handle surface and the working part "P" of the prefabricated plug, conduct heat treatment and surface grinding and working part "P". Then spend the formation of the toothed profile "P" copper electrode EDM processing.

Thus, when carrying out the claimed invention, the following conditions are true:

- means embodying the invention in its implementation, are intended for use in industry, namely in the manufacture of forging dies for extrusion products type of glass used, in particular, in the manufacture of products with internal toothed profile housings shrapnel ammunition;

for the claimed invention in the form in which it is characterized in the claims, is confirmed in moznosti its implementation using the described tools and methods;

- means embodying the invention in its implementation, is able to obtain the technical result;

- therefore, the claimed invention meets the condition of paternopoli and industrial applicability.

Proof is the fact the manufacture of punches and products - buildings shrapnel ammunition Federal state unitary enterprise "plant them. Sergo"

The method of manufacture of forging dies for extrusion products type of glass with an inner toothed profile, characterized in that it includes the segment of the workpiece, obtaining a semi-finished product, with working parts, processing, heat treatment, grinding semi-finished and further forming on the side of the working part of the gear profile by the method of electric discharge machining.



 

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