声发射(AE)法是被公认的较为理想的在线监测刀具破损的方法,但该方法要完全适于加工中心乃至自动线的需要,还有许多关键性技术问题需要解决。本文对三个关键性技术问题,即对声发射检测仪理想滤波器的设计方法、钻铣类加工机床刀具破损AE信号传输的新途径—磁流体传导技术、刀具破损声发射信号时频特性的确定进行了研究。 Acoustic emission (AE) method is recognized as the ideal method of on-line monitoring tool breakage, but the method is completely suitable for machining centers and even automatic lines. There are many key technical problems to be solved. In this paper, three key technical issues, namely, the design method of the ideal filter for acoustic emission detector, the new way of AE signal transmission of tool breakage in drilling and milling machining tools - the magnetic fluid conduction technology, the time-frequency characteristics of the damaged acoustic emission signal Make sure that the research was done.