Abstract: For an automatic machining system, reliable detection of outing tool breakage and so were wear on line is a key issue. Acoustic emission signal is used to detect various kinds of cutting tool breakage on machining centre. In order to monitor various kinds of cutting tool in different machining operations under different machining conditions, a modified pattern recognition algorithm has been developed Based on this algorithm, a synthetic monitoring system of cutting tool breakage is introduced. The system can monitor milling drilling, turning, boring, etc. operations on machining centre, so the monitoring of an automatic machining system could be performed. More than 90 percent was obtained for the rate of success on CNC lathes and machining centres.

Key words: 刀具, 加工中心, 监测系统, 模式识别, 声发射