FIELD: machine engineering.
SUBSTANCE: after the workpiece is placed on the die and when the press slider moves down along with the punch and the female clamp resting on the springs to create the pressing force of the edge part of the workpiece, the preform is pre-bent by pressing the die inside the die aperture. Then, in the further course of the slider of the press, the edge portion of the blank is pressed against the unfolding pressure surface of the die by the working surface of the pressing. Further, the central part of the workpiece is drawn upside down, with a punch in the cavity of the die.
EFFECT: accuracy of the dimensions of the parts increases.
3 cl, 2 dwg
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