Reduction of burr generation with solid lubricating sheet for drilling titanium alloy

Abstract

This research clarified the effects of solid lubricating sheet for reduction of burr generation and lowering of cutting temperature through examining of drilling in titanium alloy for aircraft. Titanium alloy is difficult to drilling. Moreover worker cannot use plenty of lubricating oil in drilling. So drills are exchanged frequently even if the cost increases. In this study, the temperature of work pieces made of Ti-6Al-4V were measured by thermo camera while drilling. As the results, a height of back burr increases rapidly around 350～400°C and more. Moreover, in specific range, the solid lubricating sheet can be decreased height of back burr and lowering of cutting temperature compared to without it.