Transactions of Materials and Heat Treatment

Title：A springback compensation method on new torsion beam based on pre-compression bending

Authors： Li Xiaoguang1 Zhang Meng2 Jiao Zhihui2 Lang Lihui2 Wu Jiawen3

Unit： 1. AECC Shenyang Liming Aero Engine Co. Ltd. 2. School of Mechanical Engineering and Automation Beihang University 3. Longchang Shanchuan Machinery Co. Ltd.

KeyWords： torsion beam hydroforming tube forming springback compensation pre-compression bending

ClassificationCode：TG306

year,vol(issue):pagenumber：2022,47(6):118-124

Abstract：

For the forming of a new type of torsion beam with bending characteristics on axis, the process parameters of its two-step hydroforming were given, and the prediction of forming quality was given by finite element simulation software. The results show that under the combination of process parameters for the maximum supporting pressure of 55 MPa, the maximum shaping pressure of 295 MPa and the feeding amount of 15 mm at both ends for tube, there is no risk of cracking and wrinkling in forming process. In addition, the Z-direction springback that is prone to occur in the axis of part was studied by simulation. The results show that there is a deviation of more than 5 mm after the part is formed. Based on this, a springback compensation method for pre-compression compensation before pre-forming was proposed, which was verified by numerical simulation experiments and part trial production. The results show that this method can control the springback in the Z-direction within 0.6 mm to meet the accuracy requirements and provide a reference for the springback control of subsequent tube part forming.

Funds：

四川省科技计划项目（2019YFSY0034）

李晓光（1981-），男，博士，高级工程师 E-mail：lixiaoguang9250@163.com 通信作者：郎利辉（1970-），男，博士，教授 E-mail：lang@buaa.edu.cn

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