Cross shaft closed forging process

Abstract

The invention provides a cross shaft closed forging process. An upper die is included, and a cross shaft upper die groove is formed in the axis portion of the bottom end face of the upper die; the bottom end face of the upper die is provided with four resistance tables in an annular array shape, and the four resistance tables correspond to the positions of the four extending ends of the cross shaft upper die groove correspondingly; and the bottom end face of the upper die is provided with four lock catches in an annular array shape, and the four lock catches and the four resistance tables are distributed in a spaced manner. According to the cross shaft closed forging process, the bottom end face of the upper die is provided with the four lock catches with the height being 26mm in the annular array shape, the top end face of a lower die is provided with four lock catch clamping grooves in the annular array shape, when the upper die and the lower die are in a buckled state, the four lock catches are clamped in the four lock catch clamping grooves, the upper die and the lower die are locked and limited through the lock catches and the lock catch clamping grooves, an upper die and a lower die are firmly locked by the lock catches before a forge piece is formed, then the forge piece starts to be formed, therefore the forge piece die staggering phenomenon is thoroughly solved, and meanwhile the problem of waste products generated due to forge piece die staggering is solved.

Description

technical field [0001] The invention belongs to the technical field of cross-shaft forging, and more particularly, particularly relates to a cross-shaft closed forging process. Background technique [0002] The cross shaft, also known as the ten-byte, that is, the universal joint, is a mechanism that realizes variable-angle power transmission and is used for the position where the direction of the transmission axis needs to be changed. It is the "joint" component of the universal transmission of the automobile drive system. The cross shaft rigid universal joint is a variable speed universal joint widely used in automobiles. The cross shaft is one of the key components of the cross shaft rigid universal joint. [0003] The existing cross shaft forging die adopts semi-closed forging with flash. The forging is partially formed from the cross shaft. The die is composed of upper and lower die cavities. Due to the use of a friction press for forging, the phenomenon of forgings be...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides a cross-shaft closed forging process to solve the phenomenon that the forgings of the existing cross-shaft forging dies often have wrong molds, resulting in a high reject rate of forgings; forgings have circular flashes; A large amount of flash is treated as waste, and the utilization rate of materials increases the manufacturing cost of products.

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