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RESEARCH PAPERS

Closed-Die Forging of Gear-Like Elements

[+] Author and Article Information
A. El-Domiaty, M. Shabara, M. Al-Ansary

Mechanical and Industrial Engineering Department, College of Engineering & Petroleum, Kuwait University, Kuwait

J. Manuf. Sci. Eng 120(1), 34-41 (Feb 01, 1998) (8 pages) doi:10.1115/1.2830108 History: Received September 01, 1993; Revised May 01, 1996; Online January 17, 2008

Abstract

Closed die forging of spur gears is investigated using the slab method and the upper bound technique. The tooth regions are approximated by prismatic rectangular sections. The velocity field comprising three unit deformation regions is used. A constant frictional stress between workpiece and forging die is assumed. The average punch pressure normalized by the flow stress of the gear material is determined theoretically and compared with experimental results. The experimental work is carried out on a commercial pure aluminum (Al 1100) at room temperature. The forging process is carried out using one die geometry without using any additional blocker (preform) dies. The theoretical predictions of forging pressures using slab and upper bound methods agree fairly well with the experimental results.

Copyright © 1998 by The American Society of Mechanical Engineers
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