Method of closed loop springback compensation for incremental sheet forming process  

作　　者：韩飞 莫健华 龚攀 李敏 

机构地区：[1]College of Mechanical and Electrical Engineering,North China University of Technology [2]State Key Laboratory of Material Processing and Die & Mould Technology,Huazhong University of Science and Technology

出　　处：《Journal of Central South University》2011年第5期1509-1517,共9页中南大学学报（英文版）

基　　金：Project(50175034) supported by the National Natural Science Foundation of China

摘　　要：The closed loop control model was built up for compensating the springback and enhancing the work piece precision.A coupled closed loop algorithm and a finite element method were developed to simulate and correct the springback of incremental sheet forming.A three-dimensional finite element model was established for simulation of springback in incremental sheet forming process.The closed loop algorithm of trajectory profile for the incremental sheet forming based on the wavelet transform combined with fast Fourier transform was constructed.The profile of processing tool path of shallow dishing with spherical surface was designed on the basis of the profile correction algorithm.The result shows that the algorithm can predict an ideal profile of processing track,and the springback error of incremental sheet forming is eliminated effectively.It has good convergence efficiency,and can improve the workpiece dimensional accuracy greatly.The closed loop control model was built up for compensating the springback and enhancing the work piece precision. A coupled closed loop algorithm and a finite element method were developed to simulate and correct the springback of incremental sheet forming. A three-dimensional finite element model was established for simulation of springback in incremental sheet forming process. The closed loop algorithm of trajectory profile for the incremental sheet forming based on the wavelet transform combined with fast Fourier transform was constructed. The profile of processing tool path of shallow dishing with spherical surface was designed on the basis of the profile correction algorithm. The result shows that the algorithm can predict an ideal profile of processing track, and the springback error of incremental sheet forming is eliminated effectively. It has good convergence efficiency, and can improve the workpiece dimensional accuracy greatly.

关 键 词：incremental sheet forming spingback numerical simulation closed loop control 

分 类 号：TG386[金属学及工艺—金属压力加工]