Transactions of Materials and Heat Treatment

Title：Optimization on flat-connecting die without rivet for lightweight material

Authors： Han Xiaolan Zhao Shengdun Chen Chao Xu Fan Fan Shuqin

Unit： Xi′an Jiaotong University

KeyWords： flat-connecting without rivet orthogonal test aluminum alloy 5052 connecting die interlocking value

ClassificationCode：TG306

year,vol(issue):pagenumber：2017,42(1):92-97

Abstract：

Compared with the conventional connection without rivet, the flat-connecting without rivet has main advantages of avoiding the bump formation visibly during the connecting process, ensuring smooth at the connector and enlarging the application field in the automotive lightweight by die parameter design. The geometrical parameters of flat-connecting die without rivet include punch corner radius, draft angle of the punch, blank holder corner radius, blank holder radius and punch velocity. The above parameters were optimized by the orthogonal design method, and the experimental results were verified by connecting aluminum alloy 5052. The simulation results show that the punch corner radius has a great influence on interlocking value, and followed by blank holder corner radius, punch velocity, draft angle of the punch, blank holder radius. Under the optimum combination of connecting die, the simulation result is compared with the experimental result, and the error of interlocking value is up to 6.1% as well as the error of neck thickness is 8.2%. Thus, the connecting die obtained by the orthogonal test can accurately predict the process of flat-connecting without rivet.

Funds：

国家自然科学基金资助项目（51675414）；国家04重大科技专项（2009ZX04005-031）；陕西省科技统筹创新工程计划项目（2011KTCQ01-04）

韩晓兰（1987-），女，博士研究生 E-mail：hanxiaolang007@163.com 通讯作者：赵升吨（1962-），男，博士，教授，博士生导师

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