COMBINATION-PROGRESSIVE ACTION DIE SET Russian patent published in 1994 - IPC

FIELD: sheet forming. SUBSTANCE: die set has on an upper plate a step-type cutter, a movable stripper, a blanking die and a punch for shaping operation. On a lower plate the die set also has a movable stripper, in which a die, corresponding to the step-type cutter is arranged. That die is guided by a holder. On the lower plate a die for shaping operation and a punch for blanking are arranged. All above mentioned tools, except the step-type cutter and its die, are placed in the last position of the die set. A strip, being fed to the die set, is being cut by the step-type cutter. A protrusion is being cut on the strip beforehand. In the last position the strip material is being separated around the protrusion, the blank is being pushed through the shaping die and beads are being folded. EFFECT: enhanced structure of the die set. 1 cl, 3 dwg