锻压技术

汽车车身铝合金板冲压成形有限元仿真与实验研究

英文标题：Experimental research and FEM simulation of aluminum alloy stamping forming of automotive body

作者：王浩桂林

单位：河南工业职业技术学院

关键词：铝合金板冲压成形有限元仿真

分类号：

出版年,卷(期):页码：2014,39(7):30-34

摘要：

对汽车车身铝合金板冲压成形进行有限元仿真与实验研究。结果表明，铝板整体分布较均匀，减薄率较小，可准确分析铝板在冲压成形过程中的冲压力分布、减薄程度、厚向异性。铝板具有较小的厚向异性系数，对其拉深性能影响小，沿轧制方向铝板厚度既有减薄也有增厚，且在成形部位的铝板厚度变化较大。与轧制方向成0°、45°、90°的铝板厚度变化量分别为0.27，0.27和0.26 mm。不同方向截面的铝板厚度变化也不同，铝板宽度变化量为2.8 mm，变化率为0.2%；冲压力随着凸模行程的增大不断增大，而后随着凸模行程增大，冲压力基本保持不变，并在凸模行程的最后阶段出现冲压力变小的趋势，且最大冲压力值为80 kN左右。

The finite element simulation and experimental research of aluminum alloy stamping forming of automotive body were carried out. The results show that the overall distribution of aluminum alloy sheet is uniform and the thinning rate is small, then the stamping force distribution, degree of thinning and thick anisotropy of aluminum alloy during the stamping forming process can be accurately analyzed. The formability of aluminum alloy sheet is hardly influenced by smaller thick anisotropy coefficient, thickness of aluminum alloy sheet is both thinner and thicker along the rolling direction, which at formed position changes greatly. The thickness variations of aluminum alloy sheet whose angle with rolling direction is 0 °, 45 ° and 90 ° are 0.27, 0.27 and 0.26 mm. The thickness variations of aluminum alloy sheet along different directions are also different, and the width variation of aluminum alloy sheet is 2.8 mm, whose rate of change is 0.2%. With the increasing of punch stroke, the stamping force is increasing gradually, then remains unchang, and also the stamping force tends to be smaller in the final stages of punch stroke, the maximum value of whose is about 80 kN.

基金项目：

教育部高职高专汽车类专业教学指导委员会“十二五”规划课题（QCJ11ZZ02）

王浩（1979-），男，硕士，副教授

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