The Influence of Lubricant Film Thickness on Friction Coefficients During Slow Speed Deep Drawing Operations

[+] Author and Article Information
K. R. Gilmour, S. Paul, A. G. Leacock

School of Electrical and Mechanical Engineering, Faculty of Engineering, University of Ulster, Jordanstown, Northern Ireland

J. Tribol 124(4), 846-851 (Sep 24, 2002) (6 pages) doi:10.1115/1.1330732 History: Received November 22, 1999; Revised August 01, 2000; Online September 24, 2002
Copyright © 2002 by ASME
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Wilson,  W. R. D., 1990, “Mised Lubrication in Metal Forming Processes,” Adv. Technol. Plast., 4, pp. 1667–1676.
Emmens, W. C., 1988, “The Influence of Surface Roughness on Friction,” Proc. 15th Biennial I.D.D.R.G. Congress, Detroit, Michigan, May 16–18, pp. 63–70.
Schipper, D. J., 1988, “Transitions in the Lubrication of Concentrated Contact,” Ph.D. thesis, University of Twente.
Hsu,  T. C., 1994, “Refined Models for Hydrodynamic Lubrication in Axisymmetric Stretch Forming,” ASME J. Tribol., 116, pp. 101–109.
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Boyd, M. R., 1996, “An Investigation of the Friction and Lubrication Effects in the Deep Drawing Process Through Simulative and Empirical Testing,” D. Phil. thesis, University of Ulster.
Paul, S. J., 1996, “Kinetic Friction of Lubricated Contacts in the Deep Drawing Process,” D.Phil. thesis, University of Ulster, p. 88.
Gilmour, K. R., 1989, “Simulative Testing as an Aid to the Industrial Development of Deep Drawn Complex Forms,” D.Phil. thesis, 1 , University of Ulster, pp. 98–145.


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Typical contact geometry at tool/blank interface
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Comparison of simulation model results with empirical data
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Graph illustrating partial bearing area curve of specimen surface
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Separation between blankholder and workpiece versus total loading duration
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Flowchart illustrating modified kinetic friction model
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Graph illustrating the fit of the averaged drawing load growth curve through additional data
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New graph illustrating the effect of prior loading duration on the kinetic friction curve
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Conventional graph illustrating the effect of prior loading duration on the kinetic friction curve
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A rectangular interface



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