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TECHNICAL NOTES

Predicting Critical Friction in a Two-Roll Cross Wedge Rolling Process

[+] Author and Article Information
Qiang Li, Michael R. Lovell

Department of Mechanical Engineering, University of Pittsburgh, Pittsburgh, PA 15261

J. Tribol 125(1), 200-203 (Dec 31, 2002) (4 pages) doi:10.1115/1.1491979 History: Received October 09, 2001; Revised April 03, 2002; Online December 31, 2002
Copyright © 2003 by ASME
Topics: Friction , Wedges , Geometry
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References

Deng,  Z., Lovell,  M., and Tagavi,  K. A., 1999, “The Role of Tool Segments in Determining Failure Characteristics of Cross Wedge Rolling,” Transactions of NAMRI/SME, pp. 31–36.
Xiong, H., 2000, “Experimental Characteristics of CWR Process Under Different Area Reduction,” Master thesis, University of Kentucky, Lexington, KY.
Dong,  Y., Tagavi,  K. A., and Lovell,  M. R., 2000, “Analysis of Interfacial Slip in Cross-Wedge Rolling: A Numerical and Phenomenological Investigation,” J. Mater. Process. Technol., 97, pp. 44–53.
Li,  Q., Lovell,  M. R., and Deng,  Z., 2001, “Analysis of Interfacial Slip in a Two-Roll Cross Wedge Rolling Process,” Transactions of NAMRI/SME, pp. 9–16.
Lovell,  M. R., 2001, “Evaluation of Critical Interfacial Friction in Cross Wedge Rolling,” ASME J. Tribol., 123, pp. 436–440.
Bowden,  F. P., and Tabor,  D., 1942, “Mechanism of Metallic Friction,” Nature (London), 150, pp. 197–199.
Challen,  J. M., and Oxley,  P. L. B., 1979, “An Explanation of the Different Regimes of Friction and Wear Using Asperity Deformation Models,” Wear, 53, pp. 229–243.
Halling, J., 1975, Principle of Tribology, MacMillan Press Ltd., London.

Figures

Grahic Jump Location
Critical geometric parameters (d1/D1=0.2): (a) Bowden’s model; and (b) Oxley’s model (f=0.05).
Grahic Jump Location
Comparison of Bowden’s, Oxley’s, and experimental results (ΔA=38 percent)
Grahic Jump Location
Two-roll CWR process with the forming tool

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