Method for manufacturing a rotationally symmetrical work-piece of steel

摘要

A method for manufacturing a work-piece which is rotationally symmetrical about an axis is provided wherein the work-piece has a spindle and at least one hollow member connected with the spindle by a hub part extending in radial direction. The method includes the steps of producing a work-piece blank having the rotationally symmetrical spindle and an integral, rotationally symmetrical, radially outwardly extending circumferential flange; mechanically processing the work-piece blank by at least one of boring, turning, milling, pressing, and grinding; and rolling a radially outer part of the flange to form the hollow member and leaving a remainder of the flange unchanged to form the hub. A roller is also provided for radially splitting the flange into three wings. The roller has two axially spaced splitting edges separated by a groove which has a rectangular cross-section.