FIELD: process engineering.
SUBSTANCE: invention relates to metal forming, particularly, to stamping, and may be used in drawing various parts from sheet materials. Blank is placed in die composed of male and female dies, holder, pneumatic suction cups, lifters and air release tube. Then, blank peripheral part is clamped by female die and holder when die outer slide moves up. Then, male die strains the blank central part when die inner slide moves down. Die inner and outer slides are driven backward and upward to withdraw blank drawn part. During inner slide back stroke, blank elongated part is retained in female die by pneumatic suction cups. Said pneumatic suction cups are fixed in female die at most unstable zones of blank elongated part and driven by controller. Total force of lifters exceeds that of pneumatic suction cups.
EFFECT: higher surface precision and quality, better stiffness and bearing capacity.
2 cl, 4 dwg
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