Abstract
In this study, circumstances of formation and development of different zones of cup during the deep drawing process is predicted using geometrical relationships between punch and some process variables. Also, relationships between bending angle, die and punch profile radii, strain in flange and die profile regions are obtained at a given punch travel. In addition, deformation force components are calculated and based on the obtained relationships punch force‐displacement diagrams for various punch and die profile radii are plotted. The effects of punch and die profile radii on these diagrams are then discussed. According to the proposed analysis, the effects of die and punch profile radii on deep drawing force are compared with each other. It is concluded that the die profile radius affects not only bending and unbending forces but also the actual drawing ratio while the punch profile radius has only an insignificant effect on actual drawing ratio. Also, effects of die and punch profile radii on punch stroke at maximum load are the same.
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