Transactions of Materials and Heat Treatment

Title：Precision forming process for automobile steering knuckle based on numerical simulation

Authors： Wang Dongliang Chen Nan

Unit： Sanjiang University Southeast University

KeyWords： steering knuckle thermo-mechanical coupling open pre-forging closed pre-forging forming force

ClassificationCode：TG316.3

year,vol(issue):pagenumber：2021,46(11):38-43

Abstract：

The structure of automobile steering knuckle is complex, and the process design is difficult. Therefore, in the actual forging process, the problems of material folding and incomplete local forming are prone to occur. For the above problems, the forming difficulties of steering knuckle were analyzed, and the forming process was determined. Then, the thermo-mechanical coupling numerical simulation of the most critical pre-forging process was carried out by finite element analysis software Deform, and the advantages and disadvantages of open pre-forging and closed pre-forging were analyzed from the forming process, the value of forming force and the temperature distribution of forgings. The results show that the open pre-forging has samller forming force and the defect of insufficient filling, and the closed pre-forging has larger forming force, but it could obtain the pre-forgings that meet the requirements and has uniform temperature distribution as well as good quality. Finally, based on the closed pre-forging, the simulation test of final forging was carried out to prove the reliability of the process and was verified by the production test. The actual results are consistent with the simulation results, the finished steering knuckle has good appearance, and the quality meets the design requirements.

Funds：

江苏省高校自然科学研究基金资助项目(16KJB580007)

作者简介：王冬良（1980-），男，硕士，副教授，E-mail：wang_dongliang@sju.edu.cn；通信作者：陈南（1953-），男，博士，教授，E-mail：nchen@seu.edu.cn

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