Implementation of an acoustic emission proximity detector for use in generating glass optics

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We are using the approach acoustic emission (AE) signal during a grinding operation to detect the proximity of the grinding wheel relative to a brittle material workpiece and are using this detection as a feed- back control signal in our CNC. The repeatability of the AE signal during the wheel approach is the key that allows AE to be used as a proximity detector and is demonstrated at LLNL to be about mm. We noted significant changes of the AE signal as process parameters are modified, but conclude that with a quick CNC calibration routine and holding the parameters constant ... continued below

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Blaedel, K. L.; Piscotty, M. A. & Taylor, J. S. November 11, 1996.

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Description

We are using the approach acoustic emission (AE) signal during a grinding operation to detect the proximity of the grinding wheel relative to a brittle material workpiece and are using this detection as a feed- back control signal in our CNC. The repeatability of the AE signal during the wheel approach is the key that allows AE to be used as a proximity detector and is demonstrated at LLNL to be about mm. We noted significant changes of the AE signal as process parameters are modified, but conclude that with a quick CNC calibration routine and holding the parameters constant during a given operation, the AE system can be successfully used to sense pre- contact wheel- to- workpiece separation. Additionally, the AE sensing system allows real- time monitoring during grinding to provide in- process information. The first prototype of an AE system on a commercially available generator is currently be tested at the Center for Optics Manufacturing.

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  • American Society of Precision Engineers 1996 Annual Meeting, Monterey, CA, November 9-14, 1996

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  • Other: DE00004071
  • Report No.: UCRL-JC-124817
  • Grant Number: NONE
  • Office of Scientific & Technical Information Report Number: 4071
  • Archival Resource Key: ark:/67531/metadc684384

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  • November 11, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Nov. 29, 2016, 2:25 p.m.

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Blaedel, K. L.; Piscotty, M. A. & Taylor, J. S. Implementation of an acoustic emission proximity detector for use in generating glass optics, article, November 11, 1996; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc684384/: accessed June 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.