基于响应面法和GS理论的板料成形优化

基于GS理论和响应面寻优法,借助Dynaform非线性有限元分析软件,对某型汽车横梁件成形中存在减薄率过大的问题,进行工艺参数寻优。首先,通过正交试验获取一定参数组合下的减薄率。然后,借助GS理论,获得对减薄率产生主要影响的两个参数即冲压速度和模具间隙。最后,利用Design-expert软件,以设计冲压速度和模具间隙为输入参数,减薄率为输出参数,进行响应面法寻优。通过响应面法寻优的最优解与未优化之前的对比,优化后的冲压参数对横梁件的板料成形质量有显著提升。

Optimization of sheet metal forming based on response surface methodology and GS theory

On the basis of GS theory and response surface method,the optimization of process parameters has been conducted to some model of automobile cross beam plate aiming at too big thinning rate during forming process by use of the analysis software of finite element named Dynaform.Firstly,the orthogonal test has been adopted to obtain the thinning rate under certain combination of different parameters.Then the two parameters including punching speed and tool gap have been acquired,which mainly influence the thinning rate by aids of GS theory.Finally,the optimization of process parameters has been searched by taking the design parameters of stamping speed and the mold clearance as the input parameters and the reduction rate as the output parameter by Design-expert software.By comparing the optimization results through the response surface method with those before optimization,the optimized punching parameters improve the sheet metal forming quality for the cross beam.