Research On CAD/CAE Technology Of Automobile Panel Die

Automobile industry has become one of the pillar industries in national economy. With market competition intensifying, the renewal of automobile has been speeding up. Being the key component in auto-body manufacturing, automobile panel die is the bottleneck in the generation of new automobile. There are several problems in rapid response manufacturing of the conventional design process, namely longer design period, experience-dependent designing, poorly information sharing, which often results in high rate of disused die, high risk, lack of efficiency, high cost, unexpected design, poor quality. It prevents the development of new automobile severely. Therefore, it is an important subject to shorten the period of die design, improve the efficiency of die production, assure the quality of the die in promoting the development of die enterprise and automobile industry. It is an inevitable development trend of automobile industry that uses CAD/CAE integration technology in auto-body manufacturing.According to the reality of automobile die industry nowadays, using the software UG which is developed by EDS in the US, the dissertation found a practical and feasible CAD system of die design for automobile panel, and used the nonlinear finite elements analysis software DYNAFORM as a platform to simulate the sheet metal forming process. The integration of CAD/CAE technology in automobile panel die has also been implemented.The dissertation summarized the common CAD designing process of automobile panel die, and developed a CAD system of die design for automobile panel based on UG. This system mainly included three modules such as the design of binder surface, addendum surface and draw-bead. Aiming at other aspects of CAD process about automobile panel die, specific operation methods based on UG were suggested. The dissertation studied CAE technology for automobile panel die, and described the key technology of numerical simulation in automobile panel forming process. In the case of assembled panel, the dissertation proposed a method of numerical simulation in automobile panel forming process, using DYNAFORM in several aspects such as the establishing of calculating models, the setting of simulation parameters, simulation results and formability analysis.Finally, the dissertation studied the application of CAD/CAE integration technology of automobile panel die in the case of engine hood inner panel.