不同压边工况下汽车用高强度钢板拉深性能研究

Deep Drawability of High Strength Steel Sheet under Different Blank Holder Force Conditions

摘要:

基于圆柱杯拉深标准试验，设计了用于研究高强度钢板拉深性能的圆筒拉深试验方案，在70 kN和10 kN两种压边力工况下，分别对1.2mm厚高强度钢板SPCN440W-NS进行拉深，并采用DYNAFORM软件对拉深过程进行有限元仿真。试验和仿真结果表明，试验高强度钢板减薄较为均匀，具有较好的深冲性能；压边力对高强度钢板拉深性能影响很大，高压边力工况下拉深制件表面质量较好，低压边力工况下拉深制件压料区域容易起皱；DYNAFORM软件对高压边力拉深工况仿真精度高于低压边力工况。

Abstract:

Based on benchmark cylindrical cup deep drawing scheme, a cylinder deep drawing scheme was designed to study deep drawability of the high strength steel (HSS) sheet . HSS sheet SPCN440W-NS (1.2mm) was drawn respectively under 70kN and 10kN blank holder force (BHF) conditions, and drawing process was simulated by DYNAFORM software. The test and simulation results showed that HSS sheet SPCN440W-NS had better deep drawability. BHF had great influence on deep drawability of the HSS sheet. Workpiece had better surface quality under 70kN BHF condition, and was easily wrinkled in its flange region under 10kN BHF condition. The simulation accuracy of the DYNAFORM software under 70kN BHF condition was higher than 10kN BHF condition.