High speed drilling Ti6Al4V

Abstract

This paper deals with experimental investigation on the performance of high speed drilling (HSD) on cutting force, torque, vibration, chip formation and surface integrity in drilling Ti6Al4V by uncoated carbide drills. The results show that cutting speed and feed significantly influenced the thrust force, torque and surface roughness value. Folded wavy type chips and curly type chips were produced under all tested cutting conditions. Furthermore, the transition from aperiodic to periodic chip formation occurred as the cutting speed increases. In addition, reduction of acceleration amplitude in peck drilling method significantly improved HSD performance. Significant microstructure deformations can be seen at all cutting conditions tested.