基于正交试验的铝合金覆盖件模面优化
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摘要
本文中基于正交试验,采用Dynaform软件进行某车型AA6014-T4铝合金机舱盖外板模面结构的设计和优化。研究表明:模面的拔模斜度对机舱盖外板的减薄率影响最大,而边界延长量对其增厚率影响最大。当其它成形工艺参数一定时,优化得到的最佳工艺参数为:边界延长量4mm、凸模圆角20mm、拔模斜度20°和凹模圆角10mm,经仿真和试验验证,板件成形质量好,无开裂和起皱等缺陷。
In this paper,the die face structure of the outer panel of an AA6014-T4 aluminum alloy car bonnet is designed and optimized with Dynaform based on orthogonal experiment. The study shows that the most influencing factor for panel thinning rate is the draft angle of die face while that for thickening rate is its boundary extension. The optimum technological parameters obtained by optimization with other technological parameters fixed are: a boundary extension of 4mm,a punch radius of 20 mm,a draft angle of 20 degrees and a die radius of 10 mm.They are verified by simulation and test,and the resulting panel has good forming quality without cracking and wrinkling.
In this paper,the die face structure of the outer panel of an AA6014-T4 aluminum alloy car bonnet is designed and optimized with Dynaform based on orthogonal experiment. The study shows that the most influencing factor for panel thinning rate is the draft angle of die face while that for thickening rate is its boundary extension. The optimum technological parameters obtained by optimization with other technological parameters fixed are: a boundary extension of 4mm,a punch radius of 20 mm,a draft angle of 20 degrees and a die radius of 10 mm.They are verified by simulation and test,and the resulting panel has good forming quality without cracking and wrinkling.
引文
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[6]庄蔚敏,李冰娇,解东旋.基于损伤因子的7075铝合金B柱热成形工艺优化[J].汽车工程,2015,37(11):1353-1358.
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[9]吴华英,郭成,王永信,等.轿车后围板成形过程数值模拟及参数优化[J].材料科学与工艺,2013,21(2):83-89.
[2] MILLER W S,ZHUANG L,BOTTEMA J,et al. Recent development in aluminum alloys for the automotive industry[J]. Materials Science and Engineering A,2000,280(1):37-49.
[3]黄永生,韩永志,周昌乐,等.铝合金车门外板充液拉深成形的有限元分析[J].汽车工程,2017,39(4):486-490.
[4] ABDULLAH A D,SOLIMAN M S,El-SEBAIE M G. Finite element modeling and experimental results of brass elliptic cups using a new deep drawing process through conical dies[J]. Journal of Materials Processing Technology,2014,214(4):828-838.
[5]严勇,吴超,胡志力,等.汽车铝合金覆盖件成形数值模拟的各向异性屈服准则研究[J].塑性工程学报,2016,23(2):92-97.
[6]庄蔚敏,李冰娇,解东旋.基于损伤因子的7075铝合金B柱热成形工艺优化[J].汽车工程,2015,37(11):1353-1358.
[7] BELYTSCHKO T,WONG B L,PLASKACZ E J. Fission-fusion adaptivity in finite elements for nonlinear dynamics of shells[J].Computers and Structures,1989(33):1307-1323.
[8]何为,唐斌,薛卫东,等.优化试验设计方法及数据分析[M].北京:化学工业出版社,2012.
[9]吴华英,郭成,王永信,等.轿车后围板成形过程数值模拟及参数优化[J].材料科学与工艺,2013,21(2):83-89.