METHOD OF SPINNING Russian patent published in 2011 - IPC B21D22/16 

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming, particularly, to rotary drawing of cylindrical shells, hollow articles and, to spinning. Spinning tool comprises body and spinning element made up of dual-cone roll with lead part with front and rear angle. Said spinning tool is revolved, fed in lengthwise and crosswise directions to drive into billet. Note here that spinning toll represents a disk with its face accommodating spinning roll with flexible concentric rings adjoining spinning roll on the side of front and rear angles. Note that spinning element is fixed on moving rotary part, i.e. rotor of end face induction motor that comprises stator with coiled magnetic circuit. Magnetic circuit grooves house m-phase primary. Said motor comprises also rotor with coiled magnetic circuit with short-circuited secondary fitted in its grooves. Axes of spinning tool and machined billet are located mutually perpendicular. Said billet is mounted on centers to be revolved by spinning tool due to friction forces.

EFFECT: expanded processing performances, higher quality and efficiency.

4 dwg