锻压技术

6061铝合金板数控单点渐进温成形工艺多目标优化

英文标题：Mulit-objective optimization on NC single point incremental warm forming process for 6061 aluminum alloy sheet

作者：岳太文陈晓辉门正兴马亚鑫安治国

分类号：TG386

出版年,卷(期):页码：2020,45(12):59-64

摘要：

针对6061铝合金板料，利用有限元方法建立圆锥台件数控单点渐进温成形的数值仿真模型。通过数值模拟探讨了不同加工温度、压下量、进给速度对6061铝合金板成形质量的影响，建立了各因素与最大Mises应力和最大厚度减薄率的响应面模型，并进行了以最大Mises应力和最大厚度减薄率为约束目标的多目标优化。对6061铝合金板进行数控单点渐进温成形加工实验，获得了实物零件，仿真结果与实验结果有较好的一致性。研究表明：各因素对成形力和截面厚度的影响程度的顺序依次为：加工温度>进给速度>压下量。当成形角为40°时，经过多目标优化后得到的最佳工艺参数为：加工温度为142 ℃、压下量为051 mm、进给速度为720 mm·min-1。

For 6061 aluminum alloy sheet, a numerical simulation model of NC single point incremental warm forming for truncated cone was established by finite element method, and the influences of different forming temperatures, reductions and feeding rates on the forming quality of 6061 aluminum alloy sheet were discussed by numerical simulation. Then, the response surface models of each factor on the maximum Mises stress and the maximum thinning rate of thickness were obtained，and the multi-objective optimization with the maximum Mises stress and the maximum thinning rate of thickness as constraint objectives was carried out. Furthermore, the experiments of NC single point incremental warm forming for 6061 aluminum alloy sheet were carried, and the real parts were formed to verify that the simulation results were in good agreement with the experimental results. The results indicate that the order of influences for various factors on the forming force and the section thickness are temperature, feeding rate and reduction. When the forming angle is 40°, the combination of optimal process parameters is the forming temperature of 142 ℃, the reduction of 051 mm and the feeding rate of 720 mm·min-1.

基金项目：

四川省应用基础研究项目(2019YJ0519)；四川省科技厅项目（18ZB0050)

岳太文（1982-），男，硕士，讲师 E-mail：yuetaiwen@qqcom 通讯作者：安治国（1976-），男，博士，副教授 E-mail：azgcqu@163com

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