Transactions of Materials and Heat Treatment

Title：Precision forming process on automobile trident universal joint

Authors：

Unit：

KeyWords： trident universal joint metal streamline closed extrusion numerical simulation die wear

ClassificationCode：TH164

year,vol(issue):pagenumber：2021,46(6):41-47

Abstract：

The automobile trident universal joint produced by the open die forging process requires to remove the flash, the material utilization rate is low, and the mechanical properties and the service life of parts are affected due to the cutting off of metal streamlines. In order to solve the above problems, two kinds of precision forming processes, namely, closed one-way extrusion and closed two-way extrusion, were proposed. Then, the forming processes of parts under the two processes were simulated by finite element software DEFORM respectively, and the forming condition, the metal flow law, the load-stroke curve and the die wear condition of parts under the two processes were analyzed and compared. The results show that under the closed one-way extrusion process, the parts have defects such as incomplete filling, bent pin shaft and inclined plane at the end, while under the closed two-way extrusion process, the parts are well formed. Furthermore, under the closed two-way extrusion process, the metal flow is more reasonable, the difference in the load bearing size between the dies is smaller, which is conducive to the overall die change, the die wear is smaller, and the service life of die is longer. Through the actual production test, the good quality trident universal joint parts were obtained, which verifies the accuracy and reliability of the numerical simulation results.

Funds：

2020年湖南省职业教育教学改革研究项目（ZJGB2020036）

马才伏（1972-），男，硕士，副教授 E-mail：74538806@qq.com

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