SPINNING METHOD, AND SPINNING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a cylindrical workpiece spinning method enabled to perform a molding (in an arbitrary direction without being restricted within the range of the outer shape of a workpiece) exceeding the outer shape of the workpiece.SOLUTION: At the time of spinning a work-piece 4, a mandrel 13 inserted into a processing part 4b of the work-piece 4 is brought into contact with the inner peripheral surface of the processing part 4b. In this state, the processing part 4b is relatively moved toward a workpiece support base 3 thereby to perform the molding work with a tube axis in the processing part 4b is directed in an arbitrary direction.