两种先进高强度钢板冷冲压成形的数值模拟

摘要

According to limit drawing experiments based on GB/T 15825.3-2008 and HAT test method respectively,the cold stamping process of two kinds of advanced high strength steels (SZBS600 and SPFH590)were simulated respectively using software Dynaform;The effects of blank holding force and friction coefficient on springback were analyzed,the limit drawing performances of tested steels were discussed and verification were conducted.The results show that,at the same blank holding fore,experimental springback angles of the two steels were approximately the same value,and they all decreased with the increase of blank holding force.The maximum difference between simulated and experimental springback angles was 1.03°.When blank holding force was 200 kN, with the increase of friction coefficient from 0.03 to 0.06,the simulated springback angle reduced from 13.769°to 0.676°.The experimental limit drawing ratio of steels SPFH590 and SZBS600 were 2.150 and 2.175,respectively, and the simulated results in the range of 2.0 to 2.2,experimental results and numerical simulation results are basically consistent,this proved the accuracy of the model.The two tested steels had similar springback angle and limit drawing performance.%根据GB/T 15825．3－2008规定的极限拉深试验方法和 HAT回弹测试试验方法,运用Dynaform软件对SZBS600和SPFH590两种先进高强度钢板的冷冲压成形过程进行了数值模拟,分析了压边力、摩擦因数对回弹的影响,探讨了试验钢的极限拉深性能,并进行了试验验证.结果表明：在相同的压边力下,试验得到的两种试验钢的回弹角基本相当,且均随压边力的增大而减小；模拟和试验得到的回弹角最大相差1．03°；当压边力为200 kN时,随着摩擦因数从0．03增加到0．06后,模拟得到的SZBS600钢的回弹角从13．769°降至0．676°；试验得到的 SPFH590钢和 SZBS600钢的极限拉深比分别为2．150和2．175,模拟得到的在2．0~2．2之间,与试验结果基本吻合,证明了所建模型的正确性；两种钢的回弹和极限拉深性能相当.