中文摘要：

微小孔机械钻削时不可避免地出现微钻头弯曲、折断现象,造成钻头和辅助工时的严重浪费。为解决这一问题,有必要对微孔加工钻削过程进行在线实时监测。介绍目前广泛采用的刀具状态在线自动监测技术,并对微小孔成孔监测技术的未来发展趋势进行初步探讨。

英文摘要：

Bending and breaking of micro-drill is inevitable in mechanical drilling,which waste drills and work-times seriously.To solve this problem,on-line monitoring is necessary for micro-hole drilling.On-line monitoring methods widely adopted for micro-hole drilling were introduced.The developing tendency of monitoring methods was discussed.