Springback analysis and strategy for multi-stage thin-walled parts with complex geometries  

作　　者：WANG Yao LANG Li-hui KAN Peng 王耀;郎利辉;S.Lauridsen;阚鹏

机构地区：[1]School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China [2]Collaborative Innovation Center of Advanced Aero-Engine,Beihang University,Beijing 100191,China [3]Department of Mechanical and Manufacturing Engineering,Aalborg University,Aalborg 9220,Denmark

出　　处：《Journal of Central South University》2017年第7期1582-1593,共12页中南大学学报（英文版）

基　　金：Project(2014ZX04002041)supported by the National Science and Technology Major Project,China;Project(51175024)supported by the National Natural Science Foundation of China

摘　　要：Springback of a SUS321 complex geometry part formed by the multi-stage rigid-flexible compound process was studied through numerical simulations and laboratory experiments in this work.The sensitivity analysis was provided to have an insight in the effect of the evaluated process parameters.Furthermore,in order to minimize the springback problem,an accurate springback simulation model of the part was established and validated.The effects of the element size and timesteps on springback model were further investigated.Results indicate that the custom mesh size is beneficial for the springback simulation,and the four timesteps are found suited for the springback analysis for the complex geometry part.Finally,a strategy for reducing the springback by changing the geometry of the blank is proposed.The optimal blank geometry is obtained and used for manufacturing the part.Springback of a SUS321 complex geometry part formed by the multi-stage rigid-flexible compound process was studied through numerical simulations and laboratory experiments in this work. The sensitivity analysis was provided to have an insight in the effect of the evaluated process parameters. Furthermore, in order to minimize the springback problem, an accurate springback simulation model of the part was established and validated. The effects of the element size and timesteps on springback model were further investigated. Results indicate that the custom mesh size is beneficial for the springback simulation, and the four timesteps are found suited for the springback analysis for the complex geometry part. Finally, a strategy for reducing the springback by changing the geometry of the blank is proposed. The optimal blank geometry is obtained and used for manufacturing the part.

关 键 词：SPRINGBACK model complex GEOMETRY MULTI-STAGE rigid-flexible COMPOUND process 

分 类 号：TH16[机械工程—机械制造及自动化]