锻压技术

基于变摩擦系数的铝合金板料成形性能试验

英文标题：Formability experiment of aluminum alloy sheet based on variable friction coefficient

作者：陈德茂夏建生周鑫

单位：江苏大学盐城工学院

分类号：TG155.5

出版年,卷(期):页码：2020,45(6):158-162

摘要：

采用CFT-I型多功能材料表面综合性能测试仪，在边界润滑条件下，测量施加不同载荷时AA6111铝合金和H13模具钢之间的摩擦系数，研究载荷对材料成形性能的影响规律。运用Origin软件分析试验数据，并建立受载荷影响的变摩擦系数模型，对所建模型进行有限元分析及试验验证。研究结果表明，当试验载荷从0.204 MPa增加到4.028 MPa时，摩擦系数随载荷的不断增大而逐渐减小，且减小趋势逐渐变缓。基于变载荷摩擦系数模型与试验测量得到的摩擦系数之间的误差值较小，均在误差允许范围内。仿真与试验的厚度分布规律基本一致，零件的最大减薄发生在凸模圆角处，其法兰边及底面的厚度变化较小，验证了所建摩擦模型的有效性。

The friction coefficients between AA6111 aluminum alloy and H13 die steel under different loads were measured by CFT-I multifunctional material surface comprehensive performance tester under boundary lubrication condition, and the influence laws of load on the formability of materials were studied. Then, the test data were analyzed by software Origin, and the variable friction coefficient model affected by load was established. Next, the finite element analysis and test verification were performed on the model. The results show that when the experimental load increases from 0.204 to 4.028 MPa, the friction coefficient decreases with the increasing of load, and the decreasing trend slows down gradually. Furthermore, the error value of friction coefficients measured by the friction coefficient model based on variable load and the test is small, and it is within the allowable range of error. Therefore, the thickness distribution law of simulation is basically the same as that of test, the maximum thinning of parts occurs at the fillet of punch, and the thicknesses of flange edge and bottom change little to verify the effectiveness of friction model established.

基金项目：

国家自然科学基金资助项目 (51505408)

陈德茂（1994-），男，硕士研究生 E-mail：18252038323@163.com 通讯作者：夏建生（1980-），男，博士，副教授 E-mail：Xiajiansheng@163.com

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