New forging process for yoke shaft of transmission shaft

Abstract

A new forging process for a yoke shaft of a transmission shaft comprises the following steps that first, blanking is performed; second, local medium frequency induction heating is performed; third; blanks are formed, wherein heated blank materials are placed in a blank-forming mold on a blank-forming press machine, the blank-forming press machine is controlled to forge and press the heating ends of the blank materials, the blank materials are taken out after the heads are formed in a forged and pressed mode, and the blank-forming press machine is controlled to press the heads flat and enable the heads to be in the shape of a track for athletic running; fourth, final forging is performed, wherein the blank materials are placed in a final forging mold on a final forging press machine to be forged and pressed, and the blank materials become final forged pieces after being forged and pressed; fifth, edge cutting is performed, wherein middle recess parts or flash parts of the final forged pieces are cut off so that the final forged pieces can become forged piece products. Through the new forging process for the yoke shaft of the transmission shaft, stress concentration between blank material rods and the molds is avoided, the cost of pre-forging mold materials and the mold machining cost are saved, the mold production cycle is shortened, machining allowance is small, production efficiency is further improved, the labor intensity of workers is relieved, and production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of forging production of automobile transmission shafts, and in particular relates to a new forging process of transmission shaft joint yoke shafts. Background technique [0002] At present, the yoke shaft forging produced by the traditional forging process has a large machining allowance, high energy consumption, and low production efficiency. The traditional forging process of the yoke shaft is: blanking → overall intermediate frequency induction heating → billet making → pre-forging → final forging → trimming. The die forging slope of the blank after overall heating is ≥ 2 ° during forging, resulting in a large machining allowance during machining, and high energy consumption for overall heating. Because the traditional forging process of the yoke shaft is designed with pre-forging, pre-forging The increase in technology not only increases the cost of mold materials and mold processing, but also incr...

AI Technical Summary

Problems solved by technology

[0004] 1. Low production efficiency;

[0005] 2. The overall energy consumption of intermediate frequency heating is high;

[0006] 3. Large machining allowance for forgings;

[0007] 4. The average die cost per forging is high

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