MECHANISM RESEARCH FOR 3D NON-AXISYMMETRIC THIN-WALL TUBE OFFSET SPINNING  

作　　者：KUANG Weihua XIA Qinxiang RUAN Feng　 

机构地区：[1]Faculty of Material and Energy,Guangdong University of Technology,Guangzhou 510006, China [2]College of Mechanical Engineering,South China University of Technology,Guangzhou 510640, China

出　　处：《Chinese Journal of Mechanical Engineering》2006年第2期217-222,共6页中国机械工程学报（英文版）

基　　金：This project is supported by National Natural Science Foundation of China (No.50275054)Provincial Natural Science Foundation of Guangdong, China (No.020923)Provincial Science and Technology Key Project of Industry of Guangdong, China(No.2003C102013)High Level Construction Project of South China University of Technology, China(No.73056060).

摘　　要：Difference of offset spinning with conventional symmetric spinning is analyzed. A 3D FEM model for offset tube neck-spinning is established and the spinning process is simulated by means of ANSYS software. Dynamic boundary and contact problems in simulation are solved. Transient stress distribution of contact area, transient strain distribution of nodes in typical section and strain distribution of the workpiece at last are attained, the place and the cause of crack are analyzed. Strain variation curves with time of offset spinning and conventional spinning are compared. It shows the mechanism difference between offset spinning and conventional spinning. In addition, simulation results show how strain distribution of typical section, thickness of some typical nodes, axial extension in left section and force of three rollers change with time. According to the study of the variation curve, material flow law along radial, tangential and axial direction is attained and the whole spinning process is studied. The simulation results discover that offset distance is the key to manufacture offset non-symmetric tube, and process parameters change with spinning angle. Experiment data really reflect different process parameters＇ influence on conventional symmetric and offset spinning force. Experiments accord well with simulation.Difference of offset spinning with conventional symmetric spinning is analyzed. A 3D FEM model for offset tube neck-spinning is established and the spinning process is simulated by means of ANSYS software. Dynamic boundary and contact problems in simulation are solved. Transient stress distribution of contact area, transient strain distribution of nodes in typical section and strain distribution of the workpiece at last are attained, the place and the cause of crack are analyzed. Strain variation curves with time of offset spinning and conventional spinning are compared. It shows the mechanism difference between offset spinning and conventional spinning. In addition, simulation results show how strain distribution of typical section, thickness of some typical nodes, axial extension in left section and force of three rollers change with time. According to the study of the variation curve, material flow law along radial, tangential and axial direction is attained and the whole spinning process is studied. The simulation results discover that offset distance is the key to manufacture offset non-symmetric tube, and process parameters change with spinning angle. Experiment data really reflect different process parameters＇ influence on conventional symmetric and offset spinning force. Experiments accord well with simulation.

关 键 词：OFFSET SYMMETRIC NECK-SPINNING Simulation Mechanism 

分 类 号：TG306[金属学及工艺—金属压力加工]