A method for forming a stepped shaft includes: forming a billet of a predetermined mass; heating the billet; cross-wedge rolling the billet to form an intermediate workpiece having a first cylindrical portion and a second cylindrical portion that are axially spaced apart by a neck that is smaller in diameter than the first and second cylindrical portions; and performing at least one upset forging operation on the end of the intermediate workpiece to enlarge the first cylindrical portion such that in at least one location its diameter is larger than a diameter of any other portion of the stepped shaft and larger than a diameter of the billet.
申请公布号
EP2268430(A1)
申请公布日期
2011.01.05
申请号
EP20090725164
申请日期
2009.01.14
申请人
AMERICAN AXLE & MANUFACTURING, INC.
发明人
CHILSON, TERRY, R.;KHETAWAT, MAHAVEER, P.;PALE, JOHN, A.