Deep Drawing Analysis Technique Based On Backward Simulation Method Pull

Blank design and process planning are two key aspects in the development of sheet metal forming. The analysis of formability and the optimum design of blank contours of complicated deep drawing parts play an important role in the manufacturing of sheet metal parts. To achieve this purpose, the inverse approach method has been developed in recent years.hi this thesis, based on the plastic theory and the assumption of ideal forming, the FE equations for deep-drawing inverse simulation are formulated and the rigid-plastic material model for inverse simulation is also presented. The related FE equations based on ideal forming assumption using the tri-3, tri-6 membrane elements and tri-6 shell element is formulated to obtain the unknown node coordinates that form the contours of the optimum blank sheet.After modeling the part in Unigraphics on the UG/Open API technique, a practicable method is proposed to get the mesh of the part and its initial blank. After analysis based on inverse method, the nephogram of strain distribution is shown in Unigraphics. Thus, the integration of inverse simulation with Unigraphics is achieved.The functions of each module of the inverse simulation system and the relationship between the modules are discussed in this thesis. The prototype of the inverse approach system has been developed using C++ language. Several typical simulation cases are presented and analyzed in detail, and the numerical results are effective.