Transactions of Materials and Heat Treatment

Title：Analysis and optimization on acroscopic forming defect for profiled section ring rolling based on response surface method

Authors： Ma Junhui1 2 Wu Yunxin1 2 3 Gong Hai1 2 3 Zhang Tao2 3 Hao Tiewen2 3 4 Liu Lei2 3

Unit： 1.College of Electromechanical Engineering Central South University 2.State Key Laboratory of High Performance Complex Manufacturing Central South University 3.Institute of Light Alloy Central South University 4.CFHI Dalian Engineering & Technology Corporation Limited

KeyWords： forming defects asymmetric profiled section ring rolling response surface model blank angle optimization

ClassificationCode：TG335

year,vol(issue):pagenumber：2022,47(9):135-143

Abstract：

Insufficient filling is a problem of forming defects that are easily generated during the rolling process for profiled section rings, and the relationship between the degree of insufficient filling and the geometric parameters of profiled section rings is very complicated. Therefore, the numerical model of asymmetric profiled section ring rolling for 2219 aluminum alloy was established, and the influences of groove depth and groove angle of profiled section ring on the forming quality of ring were analyzed. Then, by analyzing the forming mechanism of insufficient filling defects, the method of optimizing blank size parameters was proposed to suppress the defects. Furthermore, based on the response surface method, taking groove depth, groove angle and blank angle as the design variables and the insufficient filling coefficient as the design goal, the response surface model to characterize the insufficient filling coefficient was established, and the regression test was carried out. The results show that the larger the groove depth is and the smaller the groove angle is, the easier it is to produce forming defects. Using the established response surface model, the blank angle of ring with the target groove depth of 45 mm and the groove angle of 70° is optimized. The result shows that the optimized blank can better suppress the insufficient filling defects.

Funds：

民用航天预研项目（B0109）；高性能复杂制造国家重点实验室自主研究课题(ZZYJKT2021-05)；黑龙江省重点研发计划项目（GA21D003）

马君慧（1997-），女，硕士研究生 E-mail：junhuim_nov17@foxmail.com 通信作者：吴运新（1963-），男，博士，教授，博士生导师 E-mail：wuyunxin@csu.edu.cn

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