Upper Bound Analysis of Axisymmetric, Closed-Die Forgings

[+] Author and Article Information
P. Dadras

Wright State University, Dayton, OH 45435

J. Eng. Ind 103(1), 109-112 (Feb 01, 1981) (4 pages) doi:10.1115/1.3184450 History: Received June 01, 1980; Online July 30, 2009


A kinematically admissible velocity field for axisymmetric closed die forging is proposed. The forging power and load are calculated and compared with experimental values. It is found that the theoretical predictions give estimates that are substantially higher than actual loads and powers. Also, the effect of different parameters on the height and shape of the deformation zone is investigated and it is shown that the height is independent of flash thickness and length. The angle of convergence of flow from the die to the flash decreases as the flash thickness is increased.

Copyright © 1981 by ASME
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