Transactions of Materials and Heat Treatment

Title：Multi-objective optimization design on preforming for wheel disc forgings based on quasi-equipotential field method

Authors： Kong Meng1 Wang Zongshen1 Chen Lei1 Zhu Lihua1 Gao Shan2

Unit： 1. School of Mechanical Engineering Shandong University of Technology 2. School of Materials Science and Engineering Shandong University of Technology

KeyWords： wheel disc preforming quasi-equipotential field method deformation uniformity final forging load

ClassificationCode：TG316

year,vol(issue):pagenumber：2023,48(3):1-10

Abstract：

For wheel disc forgings, combining the numerical simulation and optimization algorithm, the multi-objective optimization design of preforming for forgings based on quasi-equipotential field method was investigated. Firstly, the filling condition, deformation uniformity and forming load of billet during the pre-forging and final forging processes were simulated and analyzed, and the defects such as insufficient filling and folding were observed. Then, choosing forging filling ratio as the response value, the response surface analysis was carried out to achieve the optimal volume ratio and the value range of equipotential lines for pre-forgings based on the simulation result of electrostatic field. Finally, taking the potential value of equipotential lines as the design variable, the multi-objective optimization design on the forming forgings based on deformation uniformity and final forging load was conducted, and the potential value was 0.2370 V as the optimal solution. The results show that after optimization, the filling effect of forgings is good without defects such as folding, the equivalent strain variance is reduced from 0.4000 to 0.1945, the strain distribution is more uniform, and the final forging load decreases from 1.22×105 kN to 9.71×104 kN. Thus, the optimization effect is remarkable, which can provide reference and theoretical guidance for the production of similar forgings.

Funds：

国家自然科学基金资助项目（51605266）；山东省自然科学基金资助项目（ZR2019PEM009）；山东省高等学校青创科技支持计划项目（2021KJ068）；淄博市校城融合发展计划项目（2018ZBXC037）

作者简介：孔萌（1999-），女，硕士研究生 E-mail：21401030026@stumail.sdut.edu.cn 通信作者：王宗申（1986-），男，博士，副教授 E-mail：wangzsh@sdut.edu.cn

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