2017 : Modeling of the minimum variable blank holder force based on forming limit diagram (FLD) in deep drawing process

Prof. Dr. Ir. Wajan Berata DEA
Prof. Dr. Ing. Ir. I Made Londen Batan M.Eng
Dr.Ir. Agus Sigit Pramono DEA.


Abstract

This paper presents the mathematical approach of minimum blank holder force to prevent wrinkling in deep drawing process of the cylindrical cup. Based on the maximum of minor-major strain ratio, the slab method was applied to determine the modeling of minimum variable blank holder force (VBHF) and it compared to FE simulation. The Tin steel sheet of T4-CA grade, with the thickness of 0.2 mm was used in this study. The modeling of minimum VBHF can be used as a simple reference to prevent wrinkling in deep drawing.