不同压边工况下汽车用高强度钢板拉深性能研究
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国家杰出青年科学基金资助项目(10125208)


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

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刘瑞军,褚亚旭,闫康康.不同压边工况下汽车用高强度钢板拉深性能研究[J].农业机械学报,2011,42(10):230-234.

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