A Thermal Hydrodynamic Lubrication Theory for Hydrostatic Extrusion of Low Strength Materials

[+] Author and Article Information
R. W. Snidle

Dept. of Mechanical Engineering, University College, Cardiff, U. K.

B. Parsons, D. Dowson

Dept. of Mechanical Engineering, The University, Leeds, England

J. of Lubrication Tech 98(2), 335-342 (Apr 01, 1976) (8 pages) doi:10.1115/1.3452842 History: Received June 23, 1975; Online October 20, 2010


The paper presents a theoretical analysis of hydrodynamic lubrication in the hydrostatic extrusion process which includes a consideration of thermal effects in the lubricant film arising from the work of plastic deformation. A Newtonian lubricant with an exponential pressure-temperature-viscosity relationship has been assumed and allowance has been made for the effects of redundant deformation of the worked material. The results of the theory are compared with those from previous isothermal and solid friction theories.

Copyright © 1976 by ASME
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