安装在车门内的防撞梁是提高轿车侧碰撞安全性的关键部件，国外高安全性轿车都采用超高强度钢板制造防撞梁，但超高强度钢板成形困难，普遍采用成本高的加热成形方法。笔者介绍了采用有限元分析软件Dynaform对某高级进口型轿车超高强度钢防撞梁热成形改冷冲压工艺过程进行模拟仿真，并优化成形工艺，主要研究了温度对超高强度板内部组织变化起的作用。通过模拟和实际对比研究工艺补充面对零件成形及回弹的影响，并设置凸顶得到了优化的工艺型面，为同类相关高强度钢零件的生产起到了指导作用。

The anti-collision side beam inside the car doors is a key component to improve the safety. Foreign automobile companies use ultra-high strength steel plate to manufacture it. However, it is very difficult to form at room temperature, so usually it is made by hot stamping but the cost is high. The use of FEM software Dynaform in simulating and optimizing the forming process at room temperature is described, and the influence of temperature on internal organizational changes of the ultra-high strength sheet is mainly studied. By comparing the simulation result and real sample, the effect of addendum on stamping and springback is researched and convex roofs in the addendum is added to optimize the surface. It is helpful for manufacturing the relative high strength steel parts.

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)