A Numerical Study of Automotive Body Panel Draw Dies Defects Using Finite Element Simulation

Abstract

Among the advantages of the sheets used in the car body, it can mention the high strength, low thickness and suitable ductility. crack and wrinkling of the sheet are the most common types of defects in the drawing process. Therefore, it seems necessary to know the process factors that affect the sheet metal forming behavior. One of the critical tools of simulation and subsequent process optimization is the finite element method. In this research, with the help of AutoForm software, finite element simulation of the process is performed. After designing the appropriate Taguchi experiment, the parameters affecting the outputs, including thickness strain and surface strain on the production part, are investigated, and optimal values ​​are introduced. The known effective parameters on the process output include the forming limit diagram, sheet strength, friction coefficient, die balancers, and used sheet thickness.