METHOD OF MAKING COMPLEX-SHAPE PARTS Russian patent published in 1997 - IPC

FIELD: plastic metal working, namely manufacture of complex-shape bent parts. SUBSTANCE: blank material in the form of strip or band is fed to working zone of die set. In first position of manufacturing process material edges are trimmed, openings are punched and grooves are cut out . In next position openings are punched, flanges are bent. In last position at starting flange bending interpart bridge is cut off along its one edge and at end of punch stroke it is cut off along its other edge. Cut off bridge rolls down along slope to hopper for waste material; ready part is returned to initial level and only after that it is removed due to displacing material towards last position. Until last position at all bending operations parts are mutually joined by said interpart bridge not interfering with forming process and removed at last operation from lower level of die set but not from working level of feed of strip material. EFFECT: enhanced efficiency. 2 dwg