METHOD OF MAKING FLAT RINGS Russian patent published in 1995 - IPC

FIELD: metal pressure forming. SUBSTANCE: method comprises steps of producing an initial annular blank with its volume, sufficient for making two or more rings; rolling out the blank for making a stepped ring, whose outer surface has necessary dimensions and whose subsequent steps have height, being respectively by (1.3-1.5) times more and diameters being less according to conditions of constant volume, then separating an outer ring and after-rolling out inner rings up to their necessary dimensions. EFFECT: lowered labor consumption at making rings and enhanced stability of the blank at an initial stage of rolling it out. 1 cl, 2 dwg