抄録
Ti-6Al-4V has been widely applied in the aerospace, medical, chemical and many other industries in recent years, because its inherent superb mechanical and chemical properties can well satisfy rigor industrial application requirements. However, also as a typical difficult-to-machine material, great attention was consistently attached to its turning process, and ultrasonic assisted machining lubrication techniques were used to improve its machinability. Nevertheless, ultrasonic was mostly superimposed along the direction of the cutting speed in the existing techniques so the turning process was restricted by a ″critical cutting speed″, eventually limiting the material removal rate. In this paper, the attention is paid to the turning of Ti-6Al-4V under elliptical ultrasonic lubrication where the ultrasonic vibration is superimposed in both radial and feed direction in the base plane. The fundamental turning characteristics of Ti-6Al-4V is researched by experimentally investigating the effects of vibration amplitudes and depth of cut on the machining characteristics such as cutting force, cutting temperature and surface roughness under the in-base-plane ultrasonic lubrication. This paper reports the results of our preliminary research.
