Mei ZHAN
材料科学技术（英文）
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:
hin-walled tube
,
回弹
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数值解析方法
,
三维刚塑性有限
Mei ZHAN
,
He YANG
,
Yuli LIU
材料科学技术（英文）
With the development of computer technology and finite element method, the priority research area of plastic forming has focused on 3D FE simulation of forming processes for components with complicated geometrical shape. These processes have complex deforming mechanism, and different sections have different deforming characteristics. Therefore, for making a simple, convenient, and practical analysis of its deforming law, how to obtain deformation information of key sections from the results of 3D FE simulation has become one of problems urgently to be solved. So, a method of obtaining deformation information by tracing deformation from sections for 3D FE simulation has been proposed. From the deformation information got by this method, the deformation law of key locations and the whole deforming body can be obtained. This method can also help to compare the result from FE simulation with that from physical modeling. Key procedures of this method have been presented in detail, and it has been tested by applying to 3D FE simulation of precision forging of the blade with a damper platform. The result shows that the method is practicable and reliable, and it can also be applied to 3D FE simulation of plastic forming processes of other components.
关键词:
Plastic forming
,
null
,
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