An acoustic emission-based touch-off detection system has been developed to determine contact between a rotating microtool and a workpiece surface with micron-level accuracy. The system has been implemented on an existing three-axis microscale machine tool. The system has been tested with microendmills as small as in diameter and microdrills as small as in diameter. The accuracy of the system has been found to depend on tool geometry and workpiece surface characteristics and is generally on the order of . An analytical model has been constructed to predict touch-off detection error. The calibrated model has been shown to predict surface overshoot and undershoot trends quite well. Simulations have shown that touch-off error is dominated by part surface roughness.
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e-mail: kbourne2@uiuc.edu
e-mail: mbgjun@uvic.ca
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June 2008
Special Section: Micromanufacturing
An Acoustic Emission-Based Method for Determining Contact Between a Tool and Workpiece at the Microscale
Keith A. Bourne,
Keith A. Bourne
Department of Mechanical Science and Engineering,
e-mail: kbourne2@uiuc.edu
University of Illinois at Urbana-Champaign
, Urbana, IL 61801
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Martin B. G. Jun,
Martin B. G. Jun
Department of Mechanical Engineering,
e-mail: mbgjun@uvic.ca
University of Victoria
, Victoria, BC, Canada
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Shiv G. Kapoor,
Shiv G. Kapoor
Department of Mechanical Science and Engineering,
e-mail: sgkapoor@uiuc.edu
University of Illinois at Urbana-Champaign
, Urbana, IL 61801
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Richard E. DeVor
Richard E. DeVor
Department of Mechanical Science and Engineering,
e-mail: redevor@uiuc.edu
University of Illinois at Urbana-Champaign
, Urbana, IL 61801
Search for other works by this author on:
Keith A. Bourne
Department of Mechanical Science and Engineering,
University of Illinois at Urbana-Champaign
, Urbana, IL 61801e-mail: kbourne2@uiuc.edu
Martin B. G. Jun
Department of Mechanical Engineering,
University of Victoria
, Victoria, BC, Canadae-mail: mbgjun@uvic.ca
Shiv G. Kapoor
Department of Mechanical Science and Engineering,
University of Illinois at Urbana-Champaign
, Urbana, IL 61801e-mail: sgkapoor@uiuc.edu
Richard E. DeVor
Department of Mechanical Science and Engineering,
University of Illinois at Urbana-Champaign
, Urbana, IL 61801e-mail: redevor@uiuc.edu
J. Manuf. Sci. Eng. Jun 2008, 130(3): 031101 (8 pages)
Published Online: May 5, 2008
Article history
Received:
July 27, 2006
Revised:
January 17, 2008
Published:
May 5, 2008
Citation
Bourne, K. A., Jun, M. B. G., Kapoor, S. G., and DeVor, R. E. (May 5, 2008). "An Acoustic Emission-Based Method for Determining Contact Between a Tool and Workpiece at the Microscale." ASME. J. Manuf. Sci. Eng. June 2008; 130(3): 031101. https://doi.org/10.1115/1.2917285
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