METHOD OF CIRCULAR SPINNING BY RING TOOL Russian patent published in 2011 - IPC B21D22/16 

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming, particularly, to spinning hollow articles. Deforming tool comprising spinning element arranged in the body is fed crosswise and lengthwise relative to tool lengthwise axis, and workpiece is revolved. Spinning tool is made up of ring with inner rounded working surface surrounding processed workpiece. Note here that ring outer peripheral surface seats on antifriction bearing fitted in the casing to run free therein. Note also that spinning ring face accommodates needle ring made up of metal wire frieze bundles to allow stiffness adjustment and ID smaller than that of spinning ring working surface by double fit amount.

EFFECT: expanded process performances, higher quality and efficiency.

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