摘要
采用时频处理系统,对断续切削过程中刀具破损的在线检测进行了试验研究.根据刀具破损时声发射信号的特性,并利用幅值与脉宽的逻辑"与"来判断刀具破损是否发生.分析与试验证明,采用这种鉴别方式,不仅可以排除刀具切入和切出过程对检测系统的影响,而且还可以排除刀具磨损对系统的影响.本系统可以方便地用于工业生产中铣削及断续车削加工过程刀具破损的在线检测.
This paper sets up an on-line monitor and control system which can be used (?)- termittent cutting.This system selects two parameters—amplitude,(?)and their logic'and'to decide whether fracture occurs or not.This discrimination method used is based on the acoustic emission (AE) characteristics of fracture signals,it could (?) of not only the influence of entry process,but also the influence of exit process.By the analysis and cxpcrimcnt,it could also be used while milling and machining a work(?) with slots,and consequently is easy to be used in practical machining.
关键词
刀具
破损
在线检测
声发射信号
on-line monitoring
tool fracture
acoustic emission signal
