The Filling of the Flash Gap in Closed-Die Forging

[+] Author and Article Information
J. H. L. The, R. F. Scrutton

Mechanical Engineering Department, University of Waterloo, Waterloo, Ontario, Canada

J. Eng. Ind 94(3), 904-912 (Aug 01, 1972) (9 pages) doi:10.1115/1.3428269 History: Received July 15, 1971; Online July 15, 2010


The pressures required to drive overflow material into a flash gap of annular shape and ever-decreasing thickness are calculated in the presence of thermal conduction into the die. The behavior of the plastic boundary layer near the die surface is also examined in relation to the transient flow of heat into the die. The energy expended in material acceleration is considered in the analysis and is shown to have a dominant influence on power requirement in some instances.

Copyright © 1972 by ASME
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