공구마모 진행에 따른 절삭가공모니터링 신호의 특성

The monitoring system is indispensable to maintain a constant quality of the final product by collecting data for all the situations that occur during machining process. Based on the openness of machine tool’s CNC, lots of important real time controlling data, such as tool positions, the load of spindle and each feed motors, and actual feedrate, can also be monitored nowadays. This paper presents the possibility of these CNC data for monitoring the tool conditions because CNC data has many advantages. Most of all, they are much cheaper to collect than sensor signals and the monitoring algorithm can be implemented to CNC itself. Various sensor data are collected and analyzed with the synchronized CNC data. The characteristics of monitoring signals are carefully investigated in order to find the relationship between tool wear and monitoring data.