锻压技术

基于类等势场法的轮盘锻件预成形多目标优化设计

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

作者：孔萌1 王宗申1 陈磊1 朱立华1 高珊2

单位：1. 山东理工大学机械工程学院 2. 山东理工大学材料科学与工程学院

关键词：轮盘预成形类等势场法变形均匀性终锻成形载荷

分类号：TG316

出版年,卷(期):页码：2023,48(3):1-10

摘要：

以轮盘类锻件为例，结合数值模拟与优化算法，研究基于类等势场法的锻件预成形多目标优化设计。首先，模拟分析坯料在预锻和终锻过程中的充填情况、变形均匀性和成形载荷，发现存在充填不足、折叠等缺陷。然后，以锻造充填率为响应值，基于静电场模拟结果进行响应面分析，获得预锻件最佳体积比和等势线取值范围。最后，以电势值为设计变量，对锻件预成形进行基于变形均匀性和终锻成形载荷的多目标优化设计，最终得到电势值取0.2370 V时为最优解。结果表明，优化后锻件充填效果良好，无折叠等缺陷，等效应变方差由0.4000降为0.1945，应变分布更为均匀，终锻成形载荷由1.22×105 kN降为9.71×104 kN，优化效果显著，可为同类锻件的生产提供借鉴和理论指导。

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.

基金项目：

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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