Abstract
A polycrystalline diamond (PCD) tool is employed in cutting various titanium alloys because of its excellent properties. However, improving the cutting performance of titanium alloys is still a challenge. Here, an experimental investigation on the influence of ultrasonic vibration-assisted machining (UVAM) of Ti6Al4V titanium alloy on the cutting performance and action mechanism was studied using a PCD tool. Cutting force, machined surface, surface adhesion, and wear morphology were analyzed. The results indicated that UVAM can effectively improve cutting performance. It was found that there was serious adhesion and wear of slight fragments close to the cutting edge after ultrasonic-assisted dry milling. Furthermore, the action mechanism of UVAM in improving cutting performance was discussed and analyzed from the perspective of intermittent cutting.
Highlights
Vibration-Assisted Milling of Ti6Al4VCurrently, various types of titanium alloys have been increasingly used in aircraft, rockets, missiles, automobiles, ships, and biological materials; titanium alloys occupy an extremely important position because of their excellent properties [1,2,3]
Lu et al [19] studied the influence of ultrasonic vibration-assisted machining (UVAM) on titanium alloy and the results demonstrated that a combination of the high-speed ultrasonic vibration and high-pressure coolant had a positive effect on the cutting performance
UVAM, and the cutting forces of Fx, Fy, and Fz show a gradual trend with an increase in fz ranging from 0.01 to 0.08 mm/z
Summary
Vibration-Assisted Milling of Ti6Al4VCurrently, various types of titanium alloys have been increasingly used in aircraft, rockets, missiles, automobiles, ships, and biological materials; titanium alloys occupy an extremely important position because of their excellent properties [1,2,3]. The poor machinability of titanium alloys restricts their application to a large extent and results in lower machining efficiency and shorter tool life as compared with other conventional materials [4,5,6]. It is of great significance to obtain high efficiency machining performance of titanium alloys and expand their application field. Ultrasonic machining methods have been widely studied for improving cutting performance at home and abroad. Gao et al [15] found that ultrasonic-assisted milling using a new cutting force model had great effects on reducing the cutting force as compared with conventional milling. Chen et al [16] found that the method of ultrasonic machining of composites effectively decreased cutting temperature and improved machining quality
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