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

Conference · Mon Nov 11 04:00:00 EST 1996

OSTI ID:4071

Blaedel, K L ^[1]; Piscotty, M A; Taylor, J S

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1. LLNL

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• Sponsoring Organization: USDOE
• OSTI ID: 4071
• Report Number(s): UCRL-JC-124817; ON: DE00004071
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
Grinding
Monitoring
Positioning
Sound Waves