METHOD FOR DEEP IMPULSE DRAWING OF PARTS Russian patent published in 2002 - IPC

FIELD: manufacture of axially symmetrical and box-shaped parts. SUBSTANCE: method comprises steps of placing blank onto supporting surface in such a way that it rests upon punch; placing peripheral portion of blank between supporting surfaces of holder and movable container; shaping blank by action of impulse pressure created in working liquid; moving peripheral portion of blank towards punch. Motion of peripheral portion of blank at drawing lowers blank effort acting upon supporting surface. It decreases friction between blank and supporting surface. EFFECT: increased drawing degree, enhanced quality of drawn part. 1 dwg