Study on punch load of non-axisymmetric deep drawing product according to blank shape

Deep drawing process, one of sheet metal forming methods, is very useful in industrial field because of its efficiency. The deep drawing is affected by many process variables, such as blank shapes, profile radii of punch and die, formability of materials and so on. Especially, in order to obtain the optimal products in deep drawing process, blank shape is very important formability factor. In this study, we investigated the effects of blank shapes, using three kinds of blank shapes and examined the friction test about three conditions. We measured the punch load distribution according to punch stroke under the conditions of profile radii of punch and die and observed the punch load of non-axisymmetric formability. From the experimental studies, it is clarified that the size of blank shape for non-axisymmetric deep drawing product influence punch load distribution and maximum punch load according to contact area.