板料回弹控制的工艺模面优化设计

摘要

以车顶盖为研究对象,设计了若干实验方案,建立了针对板料回弹控制的工艺模面响应面模型;以回弹量为目标函数,以板料的最大增厚率和最大减薄率为约束条件,建立了优化的数学模型,通过序列二次规划方法对响应面模型进行了求解,得到优化后的模具工艺面参数.结果表明,工艺面优化后的模具成形产品在保证产品不产生重大成形缺陷的同时,塑性变形充分,而回弹量减少.%Taking an automotive roof panel as an example,a number of experiment schemes were arranged,a respond model was then established aimed to reduce spring back; by taking springback as objective function, maximum thickening and thinning as constraint conditions, an optimization model was established, to solve the model, sequential quadratic programming algorithm was employed to obtain the optimized addendum surface parameters.Results show that such optimization design could on one hand prevent the occurrence of defect,while on the other hand produce enough plastic deformation and lead to less springback amount.