FIELD: plastic metal working. SUBSTANCE: blank is deformed by a "punch-die" which one member is reciprocally mounted and the other one is mounted for rotation by applying radial and extension forces to the blank. One end of the blank is fixed on the rotatable member before deformation. Then the blank is drawn between the punch and the die with simultaneous heating and application of transversely directed extension forces to the inner surface of the blank along the entire zone of radial force application. EFFECT: improved quality. 2 dwg
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