A Refined Analytical Model for Hydrodynamic Lubrication of Cold Extrusion and Its Comparison With Experiment

[+] Author and Article Information
S. M. Mahdavian

School of Mechanical and Industrial Engineering, University of New South Wales, Kensington, N.S.W., 2033 Australia

J. of Lubrication Tech 104(1), 46-52 (Jan 01, 1982) (7 pages) doi:10.1115/1.3253163 History: Received November 27, 1980; Online November 13, 2009


In a refined analytical model for the hydrodynamic lubrication of cold extrusion, effects of viscous heating in the inlet zone and surface temperature in the work zone are included to estimate extrusion pressure for both unsteady and steady lubrication. An experimental study indicates that a hydrodynamic lubricant film may be formed by reducing friction at the start of extrusion by a secondary lubricant. Theoretical estimation of unsteady extrusion pressure is in agreement for extrusion of aluminium billets lubricated with castor oil.

Copyright © 1982 by ASME
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