Experimental study of ultrasonic elliptical vibration assisted turning of titanium alloy
Tests of ultrasonic elliptical vibration assisted turning (UEVT) of titanium alloy were carried out. The elliptical trajectories of the cutting tool under different power supplying level were obtained. The variations of the cutting forces in UEVT were analyzed. Compared with cutting forces in conventional turning (CT), the cutting forces in UEVT decreased obviously. The surface roughness in UEVT was also studied. Compared with surface roughness in CT, the surface roughness value of Ra is a little increased, while the surface roughness value of Rz is decreased obviously in UEVT. The effect of feed rate on cutting forces was analyzed. The cutting forces increase with the increase of the feed rate both in CT and UEVT. For the same feed rate, cutting forces in UEVT decrease compared with those in CT. And the extent of reduction decreases with the increase of the feed rate. The morphologies of the workpiece were observed both in CT and UEVT. Regular vibration marks along the cutting direction on the workpiece surface were found in UEVT.
1. College of Mechanical & Electrical Engineering, Beijing University of Technology, Beijing 100124, China;
2. School o Aeronautic and Manufacturing Engineering, Nanchang Hangkong University, Nanchang 330063, China;
3. Department of Machine Intelligence and Systems Engineering, Akita Prefectural University, Akita 015-0055, Japan
Abstract：Tests of ultrasonic elliptical vibration assisted turning (UEVT) of titanium alloy were carried out. The elliptical trajectories of the cutting tool under different power supplying level were obtained. The variations of the cutting forces in UEVT were analyzed. Compared with cutting forces in conventional turning (CT), the cutting forces in UEVT decreased obviously. The surface roughness in UEVT was also studied. Compared with surface roughness in CT, the surface roughness value of Ra is a little increased, while the surface roughness value of Rz is decreased obviously in UEVT. The effect of feed rate on cutting forces was analyzed. The cutting forces increase with the increase of the feed rate both in CT and UEVT. For the same feed rate, cutting forces in UEVT decrease compared with those in CT. And the extent of reduction decreases with the increase of the feed rate. The morphologies of the workpiece were observed both in CT and UEVT. Regular vibration marks along the cutting direction on the workpiece surface were found in UEVT.
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