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窗框冲压成形数值模拟及回弹补偿
英文标题:Numerical simulation and springback compensation of stamping for door frame
作者:唐妍 周宏钟 
单位:南京交通职业技术学院 上汽大通汽车有限公司南京分公司 
关键词:窗框 冲压成形 工艺切口 自由回弹 夹持方案 回弹补偿策略 
分类号:TG376.9
出版年,卷(期):页码:2020,45(12):65-71
摘要:

构建窗框冲压成形的有限元模型,对窗框拉延成形过程进行数值模拟;并通过在拉延成形到底前5 mm处设置工艺切口,解决制件开裂的问题。根据模具设计的压料力、贴合面、压料面建立全工序分析工具体;同时,考虑各工序间制件回弹、重力和制件定位的影响,对制件进行全工序回弹模拟。对比制件自由回弹及夹持状态回弹的分析结果,确定夹持方案。根据夹持状态回弹结果,确定回弹补偿策略和回弹补偿区域,实现匹配面理论合格率达95%、一般面理论合格率达96%,首次出件的合格率达91%,从而验证了回弹补偿策略的有效性。
 

The finite element model of stamping for door frame was established, and the drawing process was simulated. Then, the process notch was set at the stroke of 5 mm before drawing to the bottom to prevent the part from cracking. Based on the pressing force, bonding surface and pressing surface of die design, the full-process analysis tool body was established. Meanwhile, considering the influences of springback, gravity and positioning of part between processes, the full-process springback simulation of part was conducted, and the clamp scheme was determined by comparing the results of free springback and clamped springback. Furthermore, according to the result of clamped springback to determine the strategy and area of springback compensation, the theoretical qualified rate of mating surface is up to 95%, and the theoretical qualified rate of general surface is 96%. Finally, the qualified rate of the first tryout part is 91% to verify the effectiveness of springback compensation strategy.

基金项目:
作者简介:
唐妍(1983-),女,硕士,讲师 E-mail:tangyan4job@foxmailcom
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