CALIBRATION OF AE FOR TOOL WEAR MONITORING

A. Prateepasen, Y. H. J. Au, B. E. Jones

Abstract

A calibration procedure using an air-jet as the artificial AE source was applied to single-point tool wear monitoring. The calibration procedure involves setting up an air-jet at a fixed stand-off distance from the top rake of the tool tip, applying in sequence a set of increasing pressures and measuring the corresponding AE. The root-mean-square value of the AE (AErms) obtained is linearly proportional to the pressure applied. This paper presents the results of machining tests and air-jet pressure test, both of which confirm that the tool system is linear with respect to AE propagation. Thus, irrespective of the layout of the sensor and AE source in a tool structure, AE can be expressed in terms of the common currency of ‘pressure’ using the calibration curve produced for that layout. Tool wear stages can then be defined in terms of ‘pressure’ levels.

Keywords

calibration, Acoustic Emission, single-point machining

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IMEKO-WC-2000-TC10-P273.pdf

DOI

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IMEKO TC

TC10 - Measurement for Diagnostics, Optimization and Control

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