Added Stability Lobes in Machining Processes That Exhibit Periodic Time Variation, Part 2: Experimental Validation

[+] Author and Article Information
William T. Corpus

Dept. of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109-2125

William J. Endres

Dept. of Mechanical Engg.–Engg. Mechanics, Michigan Technological University, Houghton, MI 49931-1295

J. Manuf. Sci. Eng 126(3), 475-480 (Sep 07, 2004) (6 pages) doi:10.1115/1.1765136 History: Received October 01, 2002; Revised December 01, 2003; Online September 07, 2004
Copyright © 2004 by ASME
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Displacement power spectra for one-quarter duty cycle tests under (a) traditional chatter (2800 rpm, ωtn=1.52), (b) stable machining in the 0-1/2 peak (3500 rpm, ωtn=1.90), (c) added-lobe chatter (3900 rpm, ωtn=2.12), and (d) stable machining beyond the added lobe (5500 rpm, ωtn=2.98)  
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Experimental stability limit results as compared to those predicted using the model for duty cycles of (a) 1/4, (b) 1/3, and (c) 1/2
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Comparison of simulation results to analytical solutions for continuous machining and the zero-frequency extension of Budak and Altintas’ 6 technique, for duty cycles of (a) 1/8, (b) 1/2, and (c) 7/8
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Zero versus unity overlap for a one-half duty cycle
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Time invariant continuous machining compared to harmonically time-varying continuous machining
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Effect of damping on the 1/2 lobe for a one-half duty cycle
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Zero-damping boundaries as asymptotes for the non-zero damping boundaries—the 1/2 lobe for a one-half duty cycle
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Effect of damping on the 3/2 lobe for a one-half duty cycle




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