高强度钢保险杠成形工艺及回弹控制的数值模拟优化  

Numerical simulation and optimization of high strength steel bumper forming process and springback control

作　　者：张旭[1] 周杰[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044

出　　处：《重庆大学学报（自然科学版）》2010年第9期104-108,118,共6页Journal of Chongqing University

基　　金：科技部技术创新项目(07C26215110824);重庆大学研究生科技创新基金重点资助项目(200811B1B0130302)

摘　　要：采用高强度钢板制造的保险杠能大大提高乘员安全性,但高强度钢板成形非常困难,国内可供参考的成功案例非常有限,如果采用国外热成形技术又会显著增加成本且效率低。只能在现有水平下采用先进的数值模拟技术与调整冲压工艺相结合才能解决该问题。介绍了采用有限元分析软件Dynaform对某轿车高强度钢保险杠冷冲压成形过程进行模拟,发现回弹和破裂是其主要缺陷。通过研究工艺补充面对零件冲压成形以及回弹的影响,并总结出规律,然后对工艺补充部分进行调整,并设置凸顶得到了优化的工艺型面,最终一举取得成功,为同类相关高强度钢零件的生产起到了指导作用。Production of high strength steel bumper can greatly enhance the occupant safety.However,it is very hard to form high strength steel plate.There is rare domestic successful reference.The hot stamping technology aboard increases costs significantly,and the efficiency is low.Therefore,the only solution is combining advanced numerical simulation technology with current adjusting stamping process.The cold-forming process of a sedan＇s high strength steel bumper is simulated by FEM software Dynaform and the results show that springback and crack are the main defects.A law is summed up by researching the influence of different shapes of addendums on part forming and springback.Finally,the optimized shape of addendum is obtained by adjusting the addendum and adding convex roofs.It provides references for manufacturing similar high strength steel parts.

关 键 词：高强度钢 保险杠 有限元 数值模拟 工艺优化 回弹控制 工艺补充面 

分 类 号：TG382[金属学及工艺—金属压力加工]