Iman Zafarparandeh - MSc. Student Department of Mechanical Engineering, Ferdowsi University of Mashhad
Mehran Kadkhodayan - Associate Professor Department of Mechanical Engineering, Ferdowsi University of Mashhad

This paper discusses a finite element analysis of springback and the effects of different process parameters in the reverse cup drawing process, taken from the NUMISHEET'99 benchmark. The simulations are preformed for an aluminum alloy. The results are ompared with those reported in the literature. The forming process is simulated in ABAQUS/Explicit while the springback simulation is performed in ABAQUS/Standard. The utilized method is probing a relationship between the springback and other important factors such as initial blank thickness die gap and also hardening models. It will be shown that increasing the initial blank thickness and decreasing the die gap leads to springback reduction in the cup. Considering the required maximum punch load for different values of initial blank thickness and die gap reveals that these parameters should be controlled appropriately. Moreover, comparing the results for different hardening models shows that the combined hardening considers the softening of the material in the stage of the process than the isotropic hardening.

Springback, Reverse cup drawing, Finite element analysis