Transactions of Materials and Heat Treatment

Title：Fine algorithm of blank boundary line based on one-step inverse forming method

Authors： Zhou Jiakai Bao Yidong

Unit： Zhengde Polytechnic Nanjing University of Aeronautics and Astronautics

KeyWords： one-step inverse forming blank boundary line sheet metal stamping computation accuracy blank reverse calculation

ClassificationCode：TG386

year,vol(issue):pagenumber：2020,45(5):70-74

Abstract：

In the sheet metal stamping technology, the size and boundary line of smaller part blank can be obtained quickly by one-step inverse forming method. In order to speed up the design cycle and improve the calculation efficiency, the fine algorithm of blank boundary line was proposed for the large volume model. Then, based on the finite element numerical solution of one-step inverse forming method, the initial configuration of part was obtained, and a fine algorithm of blank boundary line for part based on rough mesh was given. Furthermore, through three processes of projection, mapping and interpolation, the boundary line corresponding to the feature line of part surface was obtained. The example shows that all the boundary lines have high accuracy to judge the rationality of the internal shape for blank helpfully and improve the forming accuracy of the final part. On the basis of guaranteeing the high efficiency of one-step inverse forming method, the algorithm significantly improves the calculation accuracy and has a high application value in the blank back calculation of large volume model.

Funds：

国家自然科学基金面上项目（51775273）

周佳恺（1991-），女，硕士，助教，E-mail：zhoujiakaigz@163.com；通讯作者：鲍益东（1976-），男，博士，副教授，E-mail：baoyd@nuaa.edu.cn

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