抄録
In this study, a method to detect wear of cutting tools of lathe for precision parts of watch was analyzed. Theoretical analysis of cutting tool's vibration was made using dummy tools, so that it was demonstrated that stick-slip vibration occurred and level of first resonance frequency increased remarkebly when a cutting tool wore. From this result, a trial manufacture of a small device to detect wear of cutting tools was made. The electric power consumption of this device is very low and the sensor of this device is piezoelectric membrane that has high sensitivity for vibration.
