Preventive maintenance system for machine tools

摘要

PROBLEM TO BE SOLVED: To provide a preventive maintenance system for a machine tool which makes it possible to mechanically and automatically judge the presence or absence of abnormality depending on the sense of an operator and detect the abnormality earlier and more accurately. SOLUTION: A vibration detection part 13 attached to a mechanism (4, 10, 12) of a machine tool 1 for detecting vibration, and a sound detection part for detecting a sound wave generated when a work W is processed by the machine tool 1. 15, a servo motor current value detection unit 16 for detecting the current value of the servo motor, vibration and sound waves during the operation of the machine tool 1, and vibration data and sound wave data in a normal state which are preset for the current value of the servo motor, respectively. An abnormality determination unit 14 that determines whether or not there is an abnormality in the mechanism of the machine tool 1 by comparing the current value data, and a machining program includes at least one of a detection start point and a detection end point of a vibration, a sound wave, and a servo motor current value. And a detection start/end command setting unit 18 for adding the command of. [Selection diagram] Figure 1