OBSERVATIONS OF TOOL LIFE AND WEAR MECHANISMS IN HIGH SPEED MACHINING OF TI- 6AL-4V WITH PCD TOOLS USING HIGH PRESSURE COOLANT SUPPLY

摘要

Usage of titanium alloys has increased since the past 50 years despite difficulties encountered during machining. In this study PCD tools were evaluated when machining Ti-6Al-4V alloy at high speed conditions under high pressure coolant supplies. Increase in coolant pressure tend to improve tool life and minimise adhesion of the work material on the cutting tool during machining. Adhesion can be accelerated by the susceptibility of titanium alloy to galling during machining.