Abstract
Many experimental studies have been conducted to explore the relations between control variables and process outputs in rotary ultrasonic machining (RUM). However, there are few reports on the comparison between RUM and conventional diamond drilling. In this paper, the cutting force and surface roughness are compared when machining alumina with RUM method and with conventional diamond drilling method. Furthermore, the effects of the control variables (rotational speed, feed rate, and ultrasonic power) on RUM outputs (such as cutting force and surface roughness) are studied. It is found that in comparison with conventional diamond drilling, the cutting force can be reduced significantly and the surface roughness can be improved by using RUM. It is also found that rotational speed, feed rate, and ultrasonic power have significant effects on RUM process.
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