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RESEARCH PAPERS

On the Solution of Three-Dimensional Metal-Forming Processes

[+] Author and Article Information
V. Nagpal

Battelle, Columbus Laboratories, Columbus, Ohio

J. Eng. Ind 99(3), 624-629 (Aug 01, 1977) (6 pages) doi:10.1115/1.3439289 History: Received March 10, 1976; Online July 15, 2010

Abstract

The use of “dual-stream functions” in analyzing some three-dimensional metal-forming processes is demonstrated in this paper. The problems discussed are open-die forging of blocks, rolling of a rectangular bar with spread, piercing by elliptic and rectangular punches, and extrusion of a rectangular shape. For these forming processes, kinematically admissible velocity fields are selected using characteristics of the two stream functions. Approximate upper-bound solutions of the forming processes can be obtained from the proposed velocity fields.

Copyright © 1977 by ASME
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