FORGING METHOD Russian patent published in 1995 - IPC

FIELD: metal pressure forming. SUBSTANCE: method comprises steps of heating a blank, embedding technological insers into it, deforming the inserts and periodically changing them; upon embedding each successive insert performing an operation of expanding the blank along its diameter by upsetting the blank with the embedded insert; providing a deformation degree in axial direction in a central portion more, than in peripheral zone at each cycle; broaching an opening after the last technological insert had been removed; chopping the received ring by several parts, straightening the parts, forming of each part a forging with necessary dimensions and shape. EFFECT: enhanced quality of gorgings. 1 cl, 14 dwg