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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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.
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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.
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A flow chart of the numerical scheme
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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.
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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.
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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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