Abstract
A new method for monitoring of elliptical vibration cutting process is proposed in this research by utilizing internal data in the ultrasonic elliptical vibration device without external sensors such as dynamometers and gap sensors. The internal data utilized here are change of resonant frequency, applied voltages and electric currents flowing through the piezoelectric actuators of the vibrator. Cutting experiments were carried out at various cutting conditions with a sharp tool and a slightly worn tool, and the internal data were acquired during machining. By analyzing the data, it is clarified that the internal data are correlated to cutting forces in the elliptical vibration cycle, which reflect the state of cutting process such as tool wear, chipping of cutting edge and structural displacement.
