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RESEARCH PAPERS: Papers on Production Engineering

Shape Changes in the Upsetting of Slender Cylinders

[+] Author and Article Information
J. A. Schey, T. R. Venner, S. L. Takomana

Department of Mechanical Engineering, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1

J. Eng. Ind 104(1), 79-83 (Feb 01, 1982) (5 pages) doi:10.1115/1.3185802 History: Received July 06, 1981; Online July 30, 2009

Abstract

Mild steel and aluminum alloy cylinders were incrementally upset with good lubrication and with sticking friction, and the development of shape was followed by measuring the diameters of the barrel and the contact face. These dimensions changed according to a power law as a function of reduction and initial diameter-to-height ratio of the specimen. Formulas are given for predictive calculations of barrelled dimensions, and these were found to be reasonably applicable also to hot forging. The expansion of the original end face was highly sensitive to friction and the material’s strain hardening characteristics, and could not be generalized.

Copyright © 1982 by ASME
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