轿车门内板成形工艺参数敏感性分析

Sensitivity analysis of forming process parameters for car door inner panel

为提高覆盖件成形模拟效率,采用特征分析、数值模拟与正交试验相结合的研究方法对某车门内板成形工艺和工艺参数敏感性进行了研究。特征分析的结果表明:窗框转角及凹槽处易裂,零件转角处易皱,门内板窗框合边面刚性差。通过对工艺进行模拟调整,成形性能得到了改善。正交试验得到部分工艺因素的敏感性排序,敏感性从高到低为:凹模圆角半径,拉深筋高度,摩擦系数,坯料尺寸,压边力,凸凹模间隙。研究结果表明:基于对产品的特征分析,结合关键工艺参数的敏感性关系对板料成形过程进行模拟优化是合理制订汽车覆盖件成形工艺的有效途径。

In order to improve simulate efficiency, a car door inner panel forming process scheme and process parameter sensitivity were studied by the method of feature analysis and numerical simulation combined with orthogonal experi- ment. The results of feature analysis show that the place of the window frame corner and groove are easy to be frac- tured, the place of panel angle is easy to he wrinkled, and the stiffness of window frame joint edge surface is poor. The research results of numerical simulation and orthogonal experiment show that the forming performance is improved through adjusting the process. The sensitivity order from high to low of partial process factors got by orthogonal ex- periment is die fillet radius, height of drawing rib, friction coefficient, blank size, blank holder force and clearance. The research results show that the process optimization based on feature analysis and the sensitivity of key parameters is an effective way for designing cover panel process.