Fig. 11From: Applying a punch with microridges in multistage deep drawing processesThe simulated forming loads of the drawn copper cup. a First stage original/modified design. b Second stage original/modified design. c Third stage original design. d Fourth stage original/modified design. e Fifth stage original/modified design. f Sixth stage original design. g Seventh stage original/modified design. h Eighth stage original/modified designBack to article page