Investigation of contact pressure in auto panel drawing dies during the forming process by using FEM method

In automotive stamping dies, the die design is generally based on experience. Usually, the loads on the die is not considered too much when the ribs, which strengthen the structure of the die, are positioned. Despite an abundance of manuscripts in the literature on formability and springback, the number of studies that examine the panel-die interaction is rather limited. The impact of the loads occurs in the form of contact pressure (CP) on the upper and lower die when the sheet metal is formed in a drawing die. For die designs, the CPs on the die must be calculated accurately in order to determine the correct position for the ribs and to optimize the weight of the die. The present study compares the CP distribution on a auto panel drawing die through different solution methods to examine the time-dependent change of the CP.