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

FIELD: manufacture of axially symmetrical and box-shaped parts by impulse deep drawing. SUBSTANCE: apparatus includes container; discharge chamber communicated with container; punch; working liquid; mounted on container member for fastening sheet blank. Container is mounted with possibility of motion relative to rigidly secured (both) discharge chamber and punch. Blank is placed on supporting surface in such a way that it rests upon punch; peripheral portion of blank is placed between supporting surfaces of holder and movable container. Pressure impulse occurred in working liquid provides shaping of blank and motion of its peripheral portion towards punch. Such motion of blank decreases blank pressure acting upon supporting surface. It reduces friction between blank and supporting surface. EFFECT: enhanced shaping degree, improved quality of drawn article. 2 dwg