METHOD FOR MAKING AXIALLY SYMMETRICAL PRODUCTS BY ROLLING OUT Russian patent published in 1997 - IPC

FIELD: plastic metal working, namely manufacture of gear wheels, discs, wheels and so on. SUBSTANCE: blank is placed in first-transition die set including die and punch performing rolling out motion. At that transition semifinished product having relief on its one side turned to die is made by combining operations of upsetting, flange drawing and calibrating. Dimensions of said semifinished product are defined by given relations. Then in final-transition die set relief is formed on other side of semifinished product at deforming initially formed relief on the same side as at first transition. EFFECT: enhanced efficiency. 2 cl, 5 dwg