Transactions of Materials and Heat Treatment

Title：Grey relation analysis on influencing factors for hydroforming tailor rolled blank cylindrical parts

Authors： Zhang Huawei1 2 Li Yuan2 Wu Jialu1 2

Unit： 1. Guangdong University of Petrochemical Technology 2.Northeastern University

KeyWords： tailor rolled blank (TRB) hydroforming thickness thinning rate grey relation analysis orthogonal test cylindrical part

ClassificationCode：TG386

year,vol(issue):pagenumber：2023,48(2):62-67

Abstract：

For the problem that the tailor rolled blank(TRB) parts were prone to forming defects in the traditional deep drawing process, the hydroforming process was introduced into the forming process of TRB cylindrical parts, and the hydroforming process of TRB was studied by numerical simulation technology. Then, the influence of liquid pool pressure on the formability of TRB was analyzed, and the influencing laws of different process parameters on the formability of TRB were discussed by the orthogonal test combined with the grey theory. The research indicate that the TRB with better formability can be acquired by the hydroforming process compared with the traditional deep drawing process. As the liquid pool pressure increasing, the maximum thickness thinning rate of TRB cylindrical parts decreases first and then increases, and the maximum movement amount of transition zone gradually decreases. When the liquid pool pressure is 10 MPa, the maximum thickness thinning rate is smaller, and the maximum movement amount of transition zone is restricted to a low level. The influencing degree of friction factor, blank holder force and liquid pool pressure on the formability of TRB hydroforming decreases in turn, and the optimized process parameters combination obtained by grey correlation analysis can improve the formability of TRB.

Funds：

国家自然科学基金资助项目(51475086)；广东石油化工学院校级科研基金项目(2020rc020);茂名市科技计划立项项目（2022025）

作者简介：张华伟(1983-)，男，博士，副教授，E-mail：zhanghw@neuq.edu.cn

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