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TECHNICAL PAPERS

Influence of Material Properties and Forming Velocity on the Interfacial Slip Characteristics of Cross Wedge Rolling

[+] Author and Article Information
Zhi Deng, Michael R. Lovell, Kaveh A. Tagavi

Dept. of Mechanical Engineering, Center for Robotics and Manufacturing Systems, University of Kentucky, Lexington, KY 40506-0108

J. Manuf. Sci. Eng 123(4), 647-653 (Feb 01, 2000) (7 pages) doi:10.1115/1.1383028 History: Received September 01, 1998; Revised February 01, 2000
Copyright © 2001 by ASME
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References

Hu, Z. H., Xu, X. H., and Sha, D. Y., 1985, Skew Rolling and Cross Wedge Rolling—Principles, Processes and Machines, Metall. Ind. Press, Beijing, China.
Fu,  X. P., and Dean,  T. A., 1993, “Past Developments, Current Applications and Trends in the Cross Wedge Rolling Process,” Int. J. Mach. Tools Manuf., 33, pp. 367–400.
Johnson, W., and Mamalis, A. G., 1977, “A Survey of Some Physical Defects Arising in Metal Working Processes,” Proceedings, 17th Int. MTDR Conf., London, pp. 607–621.
Dong,  Y., Tagavi,  K., and Lovell,  M., 2000, “Analysis of Interfacial Slip in Cross Wedge Rolling: A Numerical and Phenomenological Investigation,” J. Mater. Process. Technol., 97, No. 1–3, pp. 44–53.
Lovell,  M. R., and Deng,  Z., 1999, “Experimental Investigation of Sliding Friction between Hard and Deformable Surfaces with Application to Manufacturing Processes,” Wear, 236, No. 1–2, pp. 117–127.
Lovell, M. R., Deng, Z., and Khonsari, M. M., 1999, “Experimental Characterization of Sliding Friction with Application in Machining and Stamping Processes,” 1999 STLE/ASME International Tribology Conference, Kissimmee, Florida, October 11–13, 1999.
Cowper, G. R., and Symonds, P. S., 1957, “Strain-Hardening and Strain-Rate Effects in the Impact Loading of Cantilever Beams,” Technical Report 28, Brown University Division of Applied Mathematics.
Tsao, M. C. C., and Campbell, J. D., 1973, “Plastic Shear Properties of Metals and Alloys at High Strain Rates,” Technical Report AFML-TR-73-177, Air Force Materials Laboratory, Wright Patterson AF Base Ohio.
Lovell,  M. R., Khonsari,  M. M., and Marangoni,  R. D., 1993, “Low-Speed Friction Torque on Balls Undergoing Rolling Motion,” STLE Tribol. Trans., 36, pp. 290–296.
Dong,  Y., Lovell,  M., and Tagavi,  K., 1998, “Analysis of Interfacial Slip in Cross Wedge Rolling: An Experimentally Verified Finite Element Model,” J. Mater. Process. Technol., 80–81, pp. 273–281.
Pater,  Z., 1998, “Simulation of Cross-Wedge Rolling Process Using the Upper-Bound Method,” Scand. J. Metall., 27, pp. 120–127.

Figures

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A flat-wedge CWR process
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The geometric neutral radius and rotating angles of the workpiece. (a) The workpiece with the malformed shoulders. (b) The definition of geometric neutral radius. (c) The definition of the rotating angle.
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The meshed FEM Model applied for the interfacial slip analysis of CWR process
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Influence of forming velocity on the global slip for aluminum 1100 (α=30 deg)
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Influence of area reduction on the accumulative global slip when tool translation is 1.0 for aluminum 1100, steel 1018 and brass C21000 (v=0.4 m/s and α=30 deg)
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Influence of forming velocity and forming angle on the accumulative global slip when tool translation is 1.0 for aluminum 1100, steel 1018 and brass C21000 (ΔA=40 percent)

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