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TECHNICAL PAPERS

High Speed Grinding of Silicon Nitride With Electroplated Diamond Wheels, Part 2: Wheel Topography and Grinding Mechanisms

[+] Author and Article Information
T. W. Hwang, C. J. Evans

Manufacturing Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899

S. Malkin

Department of Mechanical and Industrial Engineering, University of Massachusetts, Amherst, MA 01003-2210

J. Manuf. Sci. Eng 122(1), 42-50 (Jun 01, 1999) (9 pages) doi:10.1115/1.538909 History: Received December 01, 1998; Revised June 01, 1999
Copyright © 2000 by ASME
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References

Figures

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SEM micrographs: (a) wheel cross section, (b) fresh wheel surface
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Schematic illustration of single-layer plated wheel: (a) fresh wheel, (b) worn wheel
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Specific grinding energy versus wear flat area
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Illustration of undeformed chip geometry with trapezoidal cross section
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Maximum undeformed chip thickness versus accumulated sliding length per unit material removal rate per unit width
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Specific grinding energy versus maximum undeformed chip thickness
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Surface roughness versus dimensionless active grain density
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Crossplots of normal and tangential grinding forces per unit width
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Average contact pressure plotted versus (a) curvature difference and (b) infeed angle
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Optical micrographs of wear flats (180 grit single-layer electroplated diamond wheel, silicon nitride workpiece): (a) wheel I, (a=50.8 μm,vw=63.5 mm/s,vs=85 m/s,t=1752 s), (b) wheel II, (a=50.8 μm,vw=63.5 mm/s,vs=149 m/s,t=1269 s), (c) wheel IV, (a=25.4 μm, vw=127 mm/s, vs=149 m/s, t=1752 s)
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Optical micrograph of wear flats (180 grit single-layer electroplated diamond wheel with removable inserts, silicon nitride workpiece): (a=50.8 μm,vw=63.5 mm/s,vs=149 m/s,t=8.3 s)
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Measured protrusion height distribution of diamond abrasive grains and fitted normal probability density function
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Active grain density versus wear depth
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Wear flat area versus wear depth
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Active grain density versus sliding length per unit material removal rate per unit width
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Wear flat area versus sliding length per unit material removal rate per unit width
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Grinding forces versus wear flat area

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