Transactions of Materials and Heat Treatment

Title：Analysis and test of influence of internal pressure on hydroforming for automobile axle housing tube

Authors： Liu Chao1 2 Wu Na1 Yang Zhian3 Sun Qiang2 Luo Liyuan2

Unit： 1. School of Mechanical and Electrical Engineering Tangshan University Tangshan 063000 China 2. Ningbo Shenglong Automotive Power Systems Co. Ltd. Ningbo 315099 China 3.Tangshan Yate Special Vehicle Co. Ltd. Tangshan 063000 China

KeyWords： automobile axle housing tube bulging forming hydroforming plastic forming internal pressure forming quality

ClassificationCode：TG394

year,vol(issue):pagenumber：2025,50(6):95-101

Abstract：

The hydroforming process is a critical step in the bulging forming of axle housing tubes, and the internal pressure is an important parameter affecting the forming quality of tube. Firstly, by analyzing the deformation process of hydroforming axle housing tube under internal pressure, the internal pressure design method was proposed, and the internal pressure variation coefficient Kp was given. Furthermore, for the hydroforming axle housing tube of truck with a load capacity of 6.5 t, the finite element simulation analysis was conducted by setting different Kp, and the influence rule of internal pressure on the forming of automobile axle housing tube was obtained. Based on the forming quality and the die force of axle housing tube, the range of the internal pressure variation coefficient Kp was 0.07-0.13. Finally, the hydroforming test was carried out on a dedicated equipment, and the test results were consistent with the finite element simulation results.Thus, the results provide a reference for the hydroforming process of large-complex-section tubes.

Funds：

河北省高等学校科学技术研究项目（QN2019335）；河北省智能装备数字化设计及过程仿真重点实验室项目；唐山市科技计划项目（21130206D）；唐山学院博创基金（tsxybc201915）

作者简介：刘超（1982-），男，博士，副教授,E-mail：33430794@qq.com;通信作者：吴娜（1980-），女，博士，教授,E-mail：myletter2006@163.com

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