Non-circular stretching male die

Abstract

The invention provides a non-circular stretching male die. The non-circular stretching male die comprises a front part, a die body and a tail part, wherein the front part, the die body and the tail part form a same cylinder with a non-circular section, which is obtained by slow-feeding wire cutting of hard alloy steel, the non-cylindrical surface is of the section required for the stretching male die (5), and a mounting hole which is vertical to the axial line is formed at the tail part. The non-circular stretching male die provided by the invention is obtained from the hard alloy steel through a slow-feeding wire cutting process without any grinding, and the obtained stretching male die is mounted through the mounting hole at the tail part.. Compared with the prior art, the non-circular stretching male die provided by the invention is obtained by wire cutting machine-shaping, so that the machining precision of the section shape of the cylinder of the die body is ensured. Simultaneously, due to the adoption of the hard alloy steel, the manufacturing cost is saved, the non-circular stretching male die has higher hardness and stronger abrasion resistance, the service life of the die is further greatly prolonged, and the actual measurement proves that the service life can be up to 40 million times, which is improved by almost 26 times in comparison with that of the original die.

Description

technical field [0001] The invention relates to a non-circular drawing punch die. Background technique [0002] In order to process some non-cylindrical workpieces in the stamping process, a drawing die with a similar shape is required, and the drawing punch is the front part for stamping, the tail part for installation and the connecting two parts, which are the same as the front part. The modulus of the cross-section cylinder is formed. Because the drawing punch has a mold body with a non-circular cross-section, it cannot be completed by traditional machining techniques. Especially when the cross-section of the workpiece to be processed is small, it is more difficult to process and form and the accuracy is difficult to guarantee due to the slender body of the drawing punch. Taking the drawing punch manufacturing of oblate cross-section as an example, the square material whose thickness is left on the length of the oblate with machining allowance is cut out by wire cuttin...

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned defects, the present invention aims to solve the technical problem that the manufacturing process is complicated and the precision cannot be improved, and at the same time solve the technical problems that the material with higher hardness cannot be used and the installation structure is not firm, so as to propose a non-circular stretching convex with a simple structure. Die mold

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