锻压技术

基于响应面法的副车架内高压成形工艺参数优化

英文标题：Optimization on process parameters for hydroforming of subframe based on response surface method

作者：李鑫周杰丁蓉蓉卢顺

分类号：TG394

出版年,卷(期):页码：2018,43(10):111-116

摘要：

以某汽车副车架为研究对象，分析了零件的结构特点，设计了弯管、预压成形和内高压成形的多工序成形工艺方案，并针对模拟结果中出现的破裂、起皱缺陷，提出一种基于响应面法的优化方法。以整形压力、初始屈服压力和轴向进给量作为优化因素，将最大减薄率和最大增厚率作为目标函数，采用响应面法构建因素与目标函数之间的拟合方程，求解得到最优的参数组合：整形压力为90 MPa、初始屈服压力为35 MPa以及轴向进给量为23 mm。最后对有限元模拟结果和工厂试验结果进行对比，结果表明：模拟结果与试验结果相吻合，该方法可以有效地优化成形参数。

For an automotive subframe, the structure features of part was analyzed, and a multiprocess forming scheme of bending, preforming and hydroforming was designed. Aiming at the crack and crinkle defects in the simulation results, an optimization method based on response surface method was proposed. Then, taking the sizing pressure, initial yield pressure and axial feeding as the optimization factors, and taking the maximum thinning rate and the maximum thickening rate as the objective functions, the fitting equation between the factors and the objective functions was constructed by the response surface method, and the optimal parameter combination with sizing pressure of 90 MPa, initial yield pressure of 35 MPa and axial feeding of 23 mm was determined. Finally, the finite element simulation results and the factory test results were compared. The results show that the simulation results are consistent with the test results to indicate that this method can effectively optimize the forming parameters.

基金项目：

重庆市前沿与应用基础研究计划项目(cstc2015 jcyjA70011)

李鑫（1994-），男，硕士研究生，E-mail：1163022125@qq.com；通讯作者：周杰（1965-），男，博士生导师，教授，E-mail：zhoujie20170323@163.com

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