DETECTING METHOD OF ABNORMALITY OF MACHINE TOOL OPERATION

摘要

The present invention relates to a method of detecting the trouble of a machine tool in the operation thereof. The method of the present invention comprises: a preparation step (S100); a reference waveform acquiring step (S200) of acquiring a reference waveform serving as a reference to determine the state of the machine tool; a monitoring section setting step (S300) of setting a monitoring section of the reference waveform acquired in the reference waveform acquiring step (S200) to automatically calculate the maximum load value and the minimum load value; an acceptable limits setting step (S400) of setting maximum and minimum acceptable limits such that a region for the sounding of an alarm is set based on the maximum and minimum load values calculated in the monitoring duration setting step (S300); a monitoring step (S500) of continuously acquiring a machining load generated in a real machining work for a material to determine if the difference between the maximum and minimum load values among machining loads acquired within the monitoring section is out of the maximum acceptable limit or the minimum acceptable limit and outputting the state of the machine tool. According to the present invention, through the above constitution, if the detected load value is within the acceptable limit even if a power supply is failed as vibration occurs outside the machine tool, or supplied power is instable, an alarm can be prevented from being sounded, thereby improving the usefulness and the reliability of the tool monitoring system. [Reference numerals] (S100) Preparation step;(S200) Reference waveform acquiring step;(S300) Monitoring duration setting step;(S400) Acceptable limits setting step;(S450) Stop operation setting step;(S460) Alarm skip setting step;(S500) Monitoring step;(S510) Monitoring date storing step