Inner hexagonal fine punching die

Abstract

The invention discloses an inner hexagonal fine punching die which comprises a punching die body, wherein one end of the punching die body is configured as a conical end; a groove is arranged on the end surface of the conical end; a punching needle is arranged in the groove and comprises a six-edge column body and a head end; the head end is in a frustum-shaped structure provided with six edges; and cutting edges are arranged on the head end and all the six edges of the six-edge column body. As the groove is arranged on a contact surface (the end surface of the conical end) in a punching process, heat quantity generated by the punching needle in the punching process can be timely diffused out from the groove so that the inner hexagonal fine punching die in the invention prevents the phenomenon of punching and cutting due to reduced mechanical properties caused by an over high temperature; due to the design of included angles and cutting edges on the conical top of frustums on the six-edge column body and the head end, the working resistance is reduced, the surface quality of a product is improved, and the corners of an inner hexagon are full; and the service life of the inner hexagonal fine punching die is also prolonged, the using cost is reduced, and the quality of the product is ensured.

Description

technical field [0001] The invention relates to a punching die, in particular to an inner hexagon fine punching die. Background technique [0002] Hexagon socket screws are widely used in various fields such as automobiles, aerospace, aviation, etc., and hexagon socket screws play a vital locking role in various mechanical mechanisms. At present, the hexagon socket head screw is mainly formed by cold heading, and the shape of the hexagon socket head is generally formed by punching the whole hexagon socket die. In order to obtain the product smoothly, a large punching force must be used. In the actual use of these extrusion dies, the temperature of the punch cannot be dissipated in time, resulting in a decrease in the performance of the punch and easy punching, so that the hexagonal position of the punched extrusion is not good. Too full, the life is short, making it difficult to control the quality; at the same time, the surface roughness of the mold itself is poor, and the...

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned technical problems, the object of the present invention is to propose a hexagonal fine punching die to solve the problem that the temperature of the punch cannot be dissipated in time, resulting in a decrease in the performance of the punch, easy punching, low service life and unsatisfactory hexagonal corners. Locking is easy to slip and other defects

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