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TECHNICAL BRIEFS

Active Control of Regenerative Chatter During Metal Cutting Process

[+] Author and Article Information
C. Mei, J. G. Cherng, Y. Wang

Department of Mechanical Engineering, The University of Michigan—Dearborn, 4901 Evergreen Road, Dearborn, MI 48128

J. Manuf. Sci. Eng 128(1), 346-349 (Jun 14, 2005) (4 pages) doi:10.1115/1.2124991 History: Received March 08, 2004; Revised June 14, 2005

Chatter, a violent relative vibration between a workpiece and a cutting tool, is a frequent problem in a machining operation. Among the many factors which contribute to the problem, regenerative chatter is found to be the most detrimental. Optimal control is designed for suppressing regenerative chatter with the critical regenerative effect taken into account. Furthermore, a novel hybrid time and frequency domain approach is developed for generating the stability lobe diagram for the dynamic system after control, since the conventional frequency domain approach is no longer feasible. Numerical results are obtained in both time and frequency domain for verifying the effectiveness of the controller as well as the hybrid approach for generating the stability lobe diagram.

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Copyright © 2006 by American Society of Mechanical Engineers
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Figures

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Figure 4

Flow chart for obtaining SLD using the proposed hybrid approach

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Figure 5

SLDs before and after control

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Figure 6

Plots of y1, y2, and y3 for b=4.5, 5.6, and 7.0 mm and spindle speed being 5500 RPM

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Figure 3

Time traces before (a) and after (b) control for cutting conditions b=2mm and Ω=3000RPM

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Figure 2

PSD before (a) and after (b) control for cutting conditions b=1mm and Ω=3000RPM

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Figure 1

Time traces before (a) and after (b) control for cutting conditions b=1mm and Ω=3000RPM

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