Transactions of Materials and Heat Treatment

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

Authors： Yue Taiwen Chen Xiaohui Men Zhengxing Ma Yaxin An Zhiguo

Unit： Chengdu Aeronautic Polytechnic China Aerodynamics Research and Development Center Chongqing Jiaotong University

KeyWords： 6061 aluminum alloy sheet single point incremental forming warm forming response surface method multiobjective optimization

ClassificationCode：TG386

year,vol(issue):pagenumber：2020,45(12):59-64

Abstract：

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.

Funds：

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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