Cold upsetting die and machining technology thereof

Abstract

The invention discloses a cold upsetting die and a machining technology thereof. The cold upsetting die comprises a shell and an inner die; the shell comprises a die shell, a ladder hole penetrating the two end faces of the die shell is formed in the die shell, a conical segment is arranged at the small end of the ladder hole, the conical segment is located on the upper surface of the die shell, the large end of the ladder hole is located on the lower surface of the die shell, the inner die comprises a conical reinforcing ring matched with the inner wall of the conical segment, an inner die core is arranged in the reinforcing ring, an axial cutting opening penetrating the inner surface and the outer surface of the reinforcing ring is formed in the side face of the reinforcing ring, an inner die back pad abutting against the lower end of the inner die is arranged in the position, below the inner die, in the ladder hole, a thread part in threaded connection with the shell is arranged below the inner die back pad, and the thread part abuts against the inner die back pad so as to enable the reinforcing ring to shrink and clamp the inner die core. The cold upsetting die can conveniently achieve detaching and assembling of the die core and die shell, meanwhile, the higher precision is achieved, the machining technology of the die can conveniently machine the components of the die, and the service life of the die is longer.

Description

technical field [0001] The invention relates to a mold, in particular to a cold heading mold and its processing technology. Background technique [0002] With the continuous improvement of processing speed of cold heading product manufacturing equipment and the continuous improvement of product technical requirements of high-end customers in the fastener industry, the original design and manufacturing accuracy and loss of cold heading molds can no longer meet the current rapid production and rapid production. The need for model change and process manufacturing capability. [0003] At present, the Chinese patent with the publication number CN 202387902 U discloses a cold heading die and processing method for manufacturing chamfers of products with different length specifications, which includes a core, a mold sleeve, a screw sleeve and a ejector pin, and the core includes a core head The part, the spacer, the mold core forming part and the mold core tail, each part of the mo...

AI Technical Summary

Problems solved by technology

The core of this kind of cold heading mold is installed in the core through interference fit. The deviation, on the one hand, will affect the quality of cold heading products, and on the other hand, it will affect the service life of the mold core and mold sleeve

In addition, since the mold core is a vulnerable part, when the mold core is greatly worn, it is necessary to use a large thrust to withdraw the mold core from the mold sleeve and then replace the mold core again

Due to the interference fit between the mold core and the mold sleeve, it is easy to cause damage to the mold sleeve during the replacement process, which affects the assembly accuracy and actual service life between the mold core and the mold sleeve

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