The use of acoustic emission (AE) for monitoring the wear of cutting tools is promising but, since an effective general methodology has not yet been established, further research is required. To scan the relationships between the AE signal on the one hand and both cutting conditions and deterioration phenomena on the other, turning tests were performed in practical conditions. Some AE amplitude parameters and the kurtosis of the squared demodulated signal exhibited a random behaviour plus sudden variations, often related to deterioration phenomena. Two monitoring methodologies are presented and their effectiveness in warning of actual process deterioration is compared. In testing unworn tools the signal amplitude was found to increase with the cutting speed and its continuous part was observed to be almost entirely independent of the feed rate and the depth of cut. Finally, the AE burst frequency was found to match the chip breaking frequency, thus confirming that chip breakage is the ...
Use of Acoustic Emission for Cutting Process Monitoring in Turning
Dalpiaz G.;Remondi M.
1988
Abstract
The use of acoustic emission (AE) for monitoring the wear of cutting tools is promising but, since an effective general methodology has not yet been established, further research is required. To scan the relationships between the AE signal on the one hand and both cutting conditions and deterioration phenomena on the other, turning tests were performed in practical conditions. Some AE amplitude parameters and the kurtosis of the squared demodulated signal exhibited a random behaviour plus sudden variations, often related to deterioration phenomena. Two monitoring methodologies are presented and their effectiveness in warning of actual process deterioration is compared. In testing unworn tools the signal amplitude was found to increase with the cutting speed and its continuous part was observed to be almost entirely independent of the feed rate and the depth of cut. Finally, the AE burst frequency was found to match the chip breaking frequency, thus confirming that chip breakage is the ...I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
