Abstract：The ultrasonic vibration assisted diamond fly cutting( UAFC) is put forward to deal with the machining of hard brittle materials,on which ultrasonic vibration is introduced into diamond fly cutting,then this composite processing method was applied to ultra-precision machining of zirconia ceramic and the good machining effects had been obtained. The machining characteristics of UAFC were firstly analyzed,and its cutting model and cutting force model were built up,then the experiment platform of UAFC was set up,thus cutting force test and tool wear test during UAFC were performed on the platform,and the effects of ultrasonic vibration parameters and cutting parameters( spindle speed,feed rate,depth of cut) on the cutting force and tool wear during UAFC were compared with that without the ultrasonic vibration. The experimental results proved that UAFC obviously reduced the cutting force and improved the tool wear.

Keyword：fly-cutting;ultrasonic machining;Zr O2ceramics;wear mechanism;