Workpiece and method of forming the same

摘要

An improved method of forming a relatively thin elongated metal product is disclosed. In forming the product, a workpiece is first tensioned with a relatively high axial tension force and then is tensioned with a reduced axial tension force. The workpiece is supported against sidewise movement with a pair of rolls having outer side surfaces which engage the surface of the workpiece throughout the axial extent of a major portion of the workpiece. The thickness of the workpiece is reduced along at least a major portion of the workpiece while the reduced tension force is maintained and the workpiece is supported by the rolls. Although the method of the present invention could be utilized to form solid workpieces, it is particularly advantageous in forming tubular workpieces having thin wall sections with a thickness of 0.050 inches or less.