Patent ID: 9669445
Date: 2017-06-06
CPC Classifications: B21D

Claim:
1. A method for reshaping a workpiece, the workpiece having a central axis, a radial inner region and a radial outer region, in which the radial inner region of said workpiece is reshaped by a punch and a die by a drawing process effected in the axial direction so that an axial material flow is caused along the central axis such that an axial shaped section is formed, resulting in an edge being formed between the axial shaped section and the radially-directed radial outer region, wherein during the forming of the axial shaped section by the drawing process, said workpiece is caused to rotate about its central axis and while rotating, said radially-directed radial outer region of said workpiece is subjected to the action of at least one shaping roller to aid the axial material flow by the drawing process such that a wall thickness in the radially-directed radial outer region is reduced by displacing material and the displaced material is caused to flow radially in the direction of the radial inner region of said workpiece into the edge between the axial shaped section and the radially-directed radial outer region.