锻压技术

5052铝合金方盒件冲压成形变压边力技术

英文标题：Variable blank holder force technology of stamping for 5052 aluminum alloy square box parts

单位：长春工业大学

分类号：TG142

出版年,卷(期):页码：2020,45(9):51-56

摘要：

以5052铝合金方盒件精确冲压成形为研究对象，通过拉伸试验获得材料的性能和参数，绘制应力-应变曲线，考虑到材料的各向异性，建立5052铝合金方盒件冲压成形的数值模拟模型，并通过试验验证了模型的有效性。基于数值模型，研究了不同的工艺参数对方盒件冲压成形的影响规律，取得了常值工艺参数的最优组合为：压边力为15.932 kN、摩擦系数为0.175、冲压速度为1313 mm·s-1。进一步研究不同变压边力下的方盒件的冲压成形性能，结果表明，施加Λ型变压边力加载方式可以改善成形质量、提高板材的成形性能。并将模拟下的方盒件与试验结果进行对比，结果相一致，验证了数值模拟的可靠性。

For the accurate stamping of 5052 aluminum alloy square box part, the material properties and parameters were obtained by the tensile test, and the stress-strain curve was drawn. Then, considering the anisotropy of material, the numerical simulation model of stamping for 5052 aluminum alloy square box part was established, and the validity of model was verified by tests. Based on the numerical model, the influence laws of different process parameters on stamping for square box part were studied, and the optimal combination of constant process parameters was obtained with the blank holder force of 15.932 kN, the friction coefficient of 0.175 and the stamping speed of 1313 mm·s-1. Furthermore, the stamping performance of square box parts under variable blank holder force was studied. The results show that the application of loading method for Λ-type variable blank holder force improves the forming quality and the forming performance of sheet, and the results obtained by comparing the simulated results of square box part with the test results are consistent, which verifies the reliability of numerical simulation.

基金项目：

国家自然科学基金资助项目（51805045）；吉林省科技发展计划项目（20190302100GX, 20200401115GX）

李奇涵（1970-），男，硕士，教授 E-mail：liqihan@ccut.edu.cn 通信作者：高嵩（1987-），男，博士，讲师 E-mail: gaosong@ccut.edu.cn

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