Description
Most die design related problems can be traced to the shape of the zone of plastic deformation dictated by the die. The shape of the deformation zone ( 5C 1) is determined by die semi-angle ( 5a 1) and per-pass reduction ( 2r 1). Draw stress, friction and heating, die pressure and wear, annealing frequency and work hardening, and center bursts are discussed in relation to 5C 1.