Universal joint forging method and shaping mould

Abstract

The invention provides a universal joint forging method. The universal joint forging method comprises the steps of upsetting, reverse extruding, truning and finishing. The reverse extruding is to perform reverse extrusion on an upset blank to form a cylindrical blank with an inner cavity at one end and a groove at the other end; the finishing is to perform finish forging of the shape sizes of the inner cavity and the cylindrical blank on the cylindrical blank with the inner cavity at one end and the groove at the other end by adopting a shaping mould and a press machine; the shaping procedure of shaping rounded corners (for short, R corners) at the bottom of the inner cavity of the cylindrical forging blank to enable the R corners at the bottom of the inner cavity of the cylindrical forging blank to be consistent is added after the finishing procedure. Compared with the prior art, as the shaping process for the R corners at the bottom of the inner cavity of the forging blank is added on the basis of the traditional process, and the simple shaping mould structure is adopted to perform shaping on the R corners at the bottom of the inner cavity is adopted, the universal joint forging method, disclosed by the invention, has the advantages of solving the problem of inconsistence of the R corners at the bottom of the inner cavity of the forging blank in a common process and guaranteeing subsequent processing and assembling of the forging member.

Description

technical field [0001] The invention relates to the field of metal precision forging, in particular to a universal joint forging method and a shaping die. Background technique [0002] The universal joint, also known as the sliding sleeve, is a component of the driving device of the constant velocity universal joint of the automobile. The constant velocity universal joint mainly consists of a sliding sleeve, a three-pin shaft, a transmission shaft, a star sleeve, a cage, and a bell housing. The inner cavity of this product is evenly distributed in the inner hole by the arc surface, and the ballway is naturally formed in the inner hole. Because the constant velocity universal joint transmits heavy driving torque, it is in high demand with heavy load and high transmission accuracy. , It is also a safety piece, so its main parts are all made of precision forgings. During the assembly process, the three-pin shaft is put into the inner cavity of the universal joint and slides t...

AI Technical Summary

Problems solved by technology

Due to the serious wear of the warm forging die, the R angle of the edge of the warm forging punch collapsed seriously, resulting in inconsistent R angle of the inner cavity at A, which affected the assembly

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