APPARATUS FOR MULTIPLE STAGE DRAWING OF CYLINDRICAL PARTS Russian patent published in 1997 - IPC

FIELD: manufacture of hollow rather deep cylindrical parts. SUBSTANCE: apparatus includes magazine for placing pack of flat blanks, punch assembly with drive unit for axially moving it, arranged under punch assembly drawing die assembly in the form of ring with through drawing holes and with drive unit for moving it along circumferential direction, system for automatically moving blanks and semifinished products to respective drawing positions. Drawing die assembly is provided with knocking out members and reducing dies arranged respectively over and under said drawing die assembly. Axes of drawing holes of punches, reducing dies and knocking out members are equally spaced one from another along circumferential direction according to drawing stages. Said magazine for blank pack is placed on reducing die assembly. System for automatically moving blanks and semifinished products in each manufacturing cycle is provided with fixed surface of drawing die assembly for two discrete clockwise angular pitches and for one doubled counterclockwise angular pitch. EFFECT: simplified blank transportation to drawing positions, lowered metal consumption. 6 dwg