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TECHNICAL PAPERS

Contact Mechanics of Superfinishing

[+] Author and Article Information
Shih-Hsiang Chang

Mechanical Engineering Department, Far East College, 49 Chung-Hwa Rd., Hsin-Shih Town, Tainan County, Taiwan, R.O.C.

Thomas N. Farris

School of Aeronautics and Astronautics, 1282 Grissom Hall, Purdue University, West Lafayette, IN 47907-1282

Srinivasan Chandrasekar

School of Industrial Engineering, 1287 Grissom Hall, Purdue University, West Lafayette, IN 47907-1287

J. Tribol 122(2), 388-393 (Jul 01, 1999) (6 pages) doi:10.1115/1.555374 History: Received July 01, 1998; Revised July 01, 1999
Copyright © 2000 by ASME
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References

Figures

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Schematic of (a) superfinishing process and force sensing system, and (b) stone-workpiece contact in superfinishing
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Conical indenter model of the contact between an abrasive particle and the workpiece used to calculate the local superfinishing normal force
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Illustration of surface profile used to estimate (a) peak-to-valley, and (b) mean surface roughness
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Typical three dimensional surface topography of a new aluminum oxide stone used in superfinishing
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Cumulative distribution functions for (a) surface height, and (b) surface cutting edge height for three aluminum oxide stones. Operating conditions are contact pressure, 0.80 MPa; workpiece speed, 700 rpm (surface speed 1.14 m/s); and oscillation frequency, 2300 cpm with amplitude, 0.5 mm.
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Cumulative distribution function for surface cutting height of aluminum oxide stone. Note that the lognormal distribution fits the measured data much better than the normal distribution.
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Variation of active cutting edge number (n) with contact pressure for bounded normal and lognormal distributions (a) percentage of active cutting edge (n/N), and (b) density of active cutting edge (n/A)
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Variation of normal force on an active cutting edge with contact pressure for bounded normal and lognormal distributions (a) average force (Pave), and (b) maximum force (Pmax) on active cutting edge
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Variation of surface roughness with contact pressure for bounded normal and lognormal distributions (a) peak-to-valley (Rt), and (b) arithmetic average (Ra). The operating conditions for the experiments are a superfinishing time of 10 s, workpiece speed of 700 rpm (surface speed 1.14 m/s), and oscillation frequency of 2300 cpm with an amplitude of 0.5 mm.

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