Abstract
Titanium alloy is difficult to dry-drill due to its properties, such as low thermal conductivity and adhesion. Previous studies indicated that adding low-frequency vibration to the drill axis can reduce drilling temperature, and extend tool life. In this study, the drilling temperature of the cutting edge was measured by the tool–work thermocouple method. The results showed that the temperature of low-frequency vibration drilling was almost equal to that in the conventional method even though the cutting thickness was increased, and with low-frequency vibration drilling the temperature decreased during the non-drilling time. On the other hand, in the case of conventional drilling, tool life decreased with increasing cutting thickness. Therefore, comparing the low-frequency vibration and conventional method, the temperature was equivalent, but the actual drilling distance became shorter by non-drilling time and tool wear was reduced.
