EXPERIMENTAL-STUDY ON AE FROM PRECISION DIAMOND MACHINING

Acoustic emission (AE) has been studied extensively as a technique for monitoring machining processes. In this study, relationships between the RMS AE signals and the cutting parameters in precision diamond tur ning are investigated experimentally. To build such experimental relat ionships, each measured RMS AE signal is seperated into two components , the one associated with the chip formation and the other one resulti ng from the rubbing friction at the tool flank-workpiece interface. Th e responses of these components to variations in cutting parameters ar e then explained. The experimental data suggest that the AE is generat ed predominantly by the chip formation in diamond turning, whereas the rubbing friction is one of the primary sources of AE in the conventio nal turning.