A Numerical-analytic Method for Quickly Predicting Springback of Numerical Control Bending of Thin-walled Tube  

作　　者：Mei ZHAN He YANG Liang HUANG 

机构地区：[1]College of Materials Science and Engineering, Northwestern Polytechnical University, Xi＇an 710072, China

出　　处：《Journal of Materials Science & Technology》2006年第5期713-720,共8页材料科学技术（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China for Distinguished Young Scholars （Grant No. 50225518）;the Teaching and Research Award Program for 0utstanding Young Teachers in Higher Education Institution of M0E, PRC;the Aeronautical Science Foundation of China （Grant No. 04H53057）.

摘　　要：Springback is one of important factors influencing the forming quality of numerical control （NC） bending of thin-walled tube. In this paper, a numerical-analytic method for springback angle prediction of the process was put forward. The method is based on springback angle model derived using analytic method and simulation results from three-dimensional （3D） rigid-plastic finite element method （FEM）. The method is validated through comparison with experimental results. The features of the method are as follows： （1） The method is high in efficiency because it combines advantages of rigid-plastic FEM and analytic method. （2） The method is satisfactory in accuracy, since the field variables used in the model is resulting from 3D rigid-plastic FEM solution, and the effects both of axial force and strain neutral axis shift have been included. （3） Research on multi-factor effects can be carried out using the method due to its advantage inheriting from rigid-plastic FEM. The method described here is also of general significance to other bending processes.Springback is one of important factors influencing the forming quality of numerical control （NC） bending of thin-walled tube. In this paper, a numerical-analytic method for springback angle prediction of the process was put forward. The method is based on springback angle model derived using analytic method and simulation results from three-dimensional （3D） rigid-plastic finite element method （FEM）. The method is validated through comparison with experimental results. The features of the method are as follows： （1） The method is high in efficiency because it combines advantages of rigid-plastic FEM and analytic method. （2） The method is satisfactory in accuracy, since the field variables used in the model is resulting from 3D rigid-plastic FEM solution, and the effects both of axial force and strain neutral axis shift have been included. （3） Research on multi-factor effects can be carried out using the method due to its advantage inheriting from rigid-plastic FEM. The method described here is also of general significance to other bending processes.

关 键 词：Thin-walled tube Numerical control bending SPRINGBACK Numerical-analytic method 3D rigid-plastic FEM 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]