材料性能参数对汽车B柱冲压成形的影响
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摘要
以最大减薄率和最大失效作为判断依据,采用有限元仿真模拟软件Autoform研究了屈服强度R_e、厚向异性系数r与加工硬化指数n对汽车B柱零件成形的影响。研究结果表明,降低屈服强度与提高厚向异性系数和加工硬化指数,可以促进零件最大减薄率和最大失效的降低。相对于R_e值而言,r值对最大减薄率有更大的影响;相对R_e值与r值来说,n值对最大失效的影响更为显著。对于B柱零件,板材选材范围为:R_e≤180 MPa、r≥1. 8、n≥0. 22。
Effects of yield strength,normal anisotropic coefficient,and work hardening index on stamping forming of B-pillar were studied with a finite element simulation software Autoform by using the maximum thickness thinning and the max failure as criteria.The results show that smaller yield strength and larger normal anisotropic coefficient and work hardening index are conducive to the reduction of the maximum thickness thinning and the max failure.The normal anisotropic coefficient has a greater impact on the maximum thickness thinning compared to the yield strength,and the work hardening index possesses the largest effect on the max failure.For stamping forming of automobile B-pillar,the yield strength should be less than or equal to 180 MPa,and the normal anisotropic coefficient and work hardening index should be equal or greater than 1.8 and 0.22,respectively.
Effects of yield strength,normal anisotropic coefficient,and work hardening index on stamping forming of B-pillar were studied with a finite element simulation software Autoform by using the maximum thickness thinning and the max failure as criteria.The results show that smaller yield strength and larger normal anisotropic coefficient and work hardening index are conducive to the reduction of the maximum thickness thinning and the max failure.The normal anisotropic coefficient has a greater impact on the maximum thickness thinning compared to the yield strength,and the work hardening index possesses the largest effect on the max failure.For stamping forming of automobile B-pillar,the yield strength should be less than or equal to 180 MPa,and the normal anisotropic coefficient and work hardening index should be equal or greater than 1.8 and 0.22,respectively.
引文
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[2]陈新平,鲍平.润滑条件对超深冲IF钢成形性能的影响[J].精密成形工程,2002,20(2):8-10.Chen Xinping,Bao Ping.The effect of lubricant on the formability of IFsteel[J].Netshape Forming Engineering,2002,20(2):8-10.
[3]包向军,蒋宏范,何丹农,等.材料参数对汽车覆盖件冲压成形性能影响的数值模拟[J].机械工程材料,2001,25(7):15-17.Bao Xiangjun,Jiang Hongfan,He Dannong,et al.Numerical simulation of the influence of material parameters on autobody panel stamping formabil ity[J].Materials for Mechanical Engineering,2001,25(7):15-17.
[4]李少平,郑静风,何丹农.板料成形参数对拉深成形性能影响的正交分析[J].锻压技术,2002,27(3):27-28.Li Shaoping,Zheng Jingfeng,He Dannong.Orthogonal analysis of the influence of sheet forming parameters on drawing properties[J].Forging and Stamping Technology,2002,27(3):27-28.
[5]韩丹,赵广东.材料性能参数对S梁成形性的影响[J].金属世界,2015(2):28-31.Han Dan,Zhao Guangdong.Effect of material property parameters on formability of S-rail[J].Metal World,2015(2):28-31.
[6]付三令.Autoform开裂失效命令使用小结[J].模具制造,2015,15(4):17-20.Fu Sanling.The summary of Autoform cracking failure command uses[J].Die and Mould Manufacture,2015,15(4):17-20.
[7]杨丽英.基于Autoform软件的板料开裂研究[J].黄冈师范学院学报,2016,36(6):76-78.Yang Liying.Sheet metal crack research based on Autoform software[J].Journal of Huanggang Normal University,2016,36(6):76-78.