Numerical Simulation of Automobile Panel Forming and Its Die Surface Design
Taking automobile body panel as an example,the determination of drawing direction,the design of binder surface,addendum surface and draw-bead,and the simulation of drawing process were implemented with the software Autoform.Defects like fracture,thinning and wrinkling in the process of sheet metal forming were predicted.The influence of the factors,like friction between sheet metals and dies,addendum surface,blank holder force,draw-bead and so on,on the defects was analyzed according to the simulation results.Furthermore,the process parameters and the die surface structure were optimized.The quality defects were removed,the reliability of forming process was improved.This supplies a reference and bases for determining process and designing die surface of automobile panel in actual production.