Computer Aided Design Of Process And Die For Cross Wedge Rolling

CAD/CAE/CAM technology is an embodiment of enterprise manufacturing level. The application of this technology in process and die design for cross wedge rolling (CWR) will promote the technical development and technology transfer of CWR. In this paper, 3-dimension CAD technology is introduced into CWR field, process and die design scheme based on rolled pieces is presented, a corresponding CAD system is developed, as well as FEM simulation technology is used as the virtual test.Comprehensive research on process and die design for CWR has been made deeply and systematically. Firstly, 3-dimension CAD technology> feature Based modeling technology and parameterization technology are explained respectively, and then introduced them into CWR field. Secondly deforming feature description of wedge feature is classified and defined, as well as the mapped relation between CWR pieces feature and wedge feature of CWR die is expatiated. On the base of this, a CAD system for CWR is developed, which includes deforming feature based description CWR pieces, the parameterization and assembly design of wedge feature for CWR, and design of step shaping curve and surface. There into step shaping and its theory, solution to step shaping curve equation, computation of start position of step-shaping curve and step-shaping curve and surface building technology are introduced emphatically. Then a CWR die design of starting-shaft automobile is taken as an example, the die and process design course for CWR using this CAD system is illustrated. Finally, FEM simulation technology is introduced into CWR process debugging and its simulation result is analyzed. The fault diagnose for CWR pieces is also summarized and can be used as reference.