Acoustic emission technique for contact detection and cutting state monitoring in ultra-precision turning

Abstract

A study to investigate contact detection and recognition of the cutting state by means of the acoustic emission (AE) technique in ultra-precision turning is presented. Detection of accurate cutting-edge position was achieved through investigation of the contact limit between the cutting edge and workpiece through use of the AE technique. Moreover, to recognize the cutting state, changes in AE signals instigated by corresponding changes in the cutting condition were monitored. In the contact-detection experiment, contact between the cutting edge and workpiece was detected with a cut depth of 10 nm. Likewise, in the cutting state recognition experiment, AE signal waveforms were observed to demonstrate changes corresponding to changes in the cutting state. These results confirm the feasibility of using the AE technique in cutting state monitoring experiments.

The Effect of Ultrafine-Grained (UFG) Structure Formed by Equal-Channel Angular Pressing in AA7075 on Wear and Friction in Sliding against Steel and Ceramic Counterbodies

“…The above-discussed results suggest that in situ VA signal changes were occurring during sliding and may be then related to adhesion wear and transfer of the metal [41][42][43].…”

“…The above-discussed results suggest that in situ VA signal changes were occurring during sliding and may be then related to adhesion wear and transfer of the metal [41][42][43]. It was discovered earlier [44][45][46][47] that AE characteristics such as median frequency and energy are the most informative ones when used for studying fast-occurring processes such as metal cutting, where friction is an integral feature.…”