Method of producing a stepped shaft

Details Method of producing a stepped shaft Method of producing a stepped shaft

2011-01-11

2011-01-11

Tolan, Edward (Department: 3725)

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

C072S108000, C072S352000

Reexamination Certificate

active

07866198

ABSTRACT:
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.

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