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TECHNICAL PAPERS

Rolling of Thin Strip and Foil: Application of a Tribological Model for “Mixed” Lubrication

[+] Author and Article Information
HR Le, M. P. F. Sutcliffe

Department of Engineering, University of Cambridge, Trumpington Street, Cambridge CB2 1PZ, UK

J. Tribol 124(1), 129-136 (Jul 03, 2001) (8 pages) doi:10.1115/1.1402179 History: Received February 02, 2001; Revised July 03, 2001
Copyright © 2002 by ASME
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References

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Le,  H. R., and Sutcliffe,  M. P. F., 2001, “A Robust Model for Rolling of Thin Strip and Foil,” Int. J. Mech. Sci., 43, pp. 1405–1419.
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Le,  H. R., and Sutcliffe,  M. P. F., 2000, “A Two-Wavelength Model of Surface Flattening in Cold-Metal Rolling With Mixed Lubrication,” STLE Tribol. Trans., 43, No. 4, pp. 595–602.
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Figures

Grahic Jump Location
Schematic of foil rolling process: (a) division of roll bite into: A—inlet elastic zone, B—inlet plastic slip zone, C—central sticking zone, D—exit plastic slip and E—exit elastic zone; and (b) surface roughness.
Grahic Jump Location
Variation of friction coefficient with smooth film thickness hw during drawing of 6mm thick aluminum strip 16. The solid line, which is used in the model, is a fit through the data for a reduction of 25 percent. Values of smooth film thickness for passes A and B are marked.
Grahic Jump Location
A flow chart of the numerical scheme
Grahic Jump Location
Theoretical results for pass A (t1=210 μm,r=50 percent,ur=6 m/s); (a) interface pressure and shear stress; and (b) roll shape and contact ratio.
Grahic Jump Location
Theoretical results for pass B (t1=30 μm,r=50 percent,ur=10 m/s); (a) interface pressure and shear stress; (b) roll shape and contact ratio.
Grahic Jump Location
Comparison for pass A (t1=210 μm,r=50 percent) between predictions and measurements: (a) roll load; and (b) forward slip.
Grahic Jump Location
Comparison for pass B (t1=30 μm,r=50 percent) between predictions and measurements: (a) roll load; and (b) forward slip.

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