基于响应面法的汽车翼子板冲压成形工艺多目标优化  

Multi-objective optimization of stamping process for automotive fender based on response surface method

作　　者：段磊[1] 陈鹏 张洋[2] 向婷 董浩 马舟 王俊博 DUAN Lei;CHEN Peng;ZHANG Yang;XIANG Ting;DONG Hao;MA Zhou;WANG Jun-bo(College of Mechanical Engineering,Tianjin University of Technology and Education,Tianjin 300222,China;International College,Tianjin University of Technology and Education,Tianjin 300222,China)

机构地区：[1]天津职业技术师范大学机械工程学院,天津300222 [2]天津职业技术师范大学国际学院,天津300222

出　　处：《塑性工程学报》2024年第10期44-54,共11页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(52105394);国家级大学生创新创业训练计划项目(202310066026);天津市科技计划项目(20YDTPJC01650)。

摘　　要：为解决汽车翼子板冲压成形时出现的破裂、表面凹陷及滑移线等质量问题,利用Autoform软件对拉延成形过程进行数值模拟,基于响应面法的中心复合设计,选取压边力、摩擦因数、拉延筋阻力系数为优化变量,以最大减薄率、主次应变、表面滑移线最大滑移距离为优化目标,建立优化变量对优化目标影响的响应面模型,确定最优工艺参数组合为:压边力700 kN,摩擦因数0.15,拉延筋1、拉延筋2、拉延筋3和拉延筋4的阻力系数分别为0.45、0.45、0.35和0.45 N·mm^(-1)。基于最优工艺参数的模拟结果,通过设计加强拉延筋将表面滑移线最大滑移距离降为4.94 mm。对比模拟结果和实际试模样件的检测结果发现,两者基本一致,制件的最大减薄率、主次应变、表面滑移线最大滑移距离均满足技术要求,从而验证了响应面法优化冲压工艺的可行性和有效性。To solve the quality problems such as splits,surface indentation and slip line during stamping of automotive fender,the drawing process was numerically simulated by Autoform software.Based on the central composite design of response surface method,the blank holder force,friction factor and resistance coefficient of draw bead were selected as optimization variables,and the maximum thinning ratio,major and minor strain and the maximum slip distance of surface slip line were taken as optimization objectives.The response surface model of the influence of optimization variables on the optimization objective was established,and the optimal process parameter combination was determined as follows:blank holder force is 700 kN,friction factor is 0.15,resistance coefficients of draw bead 1,draw bead 2,draw bead 3 and draw bead 4 were 0.45,0.45,0.35 and 0.45 N·mm^(-1),respectively.Based on the simulation results of the optimal process parameters,the maximum slip distance of the surface slip line is reduced to 4.94 mm by designing reinforcing draw bead.Comparing the simulation results with the actual sample test results,it is found that the two are basically consistent.The maximum thinning ratio,major and minor strain,and the maximum slip distance of surface slip line meet the technical requirements,thus verifying the feasibility and effectiveness of the response surface method to optimize the stamping process.

关 键 词：板料成形 响应面法 减薄率 主应变 次应变 滑移线 

分 类 号：TG386[金属学及工艺—金属压力加工]