High speed turning of Ti6Al4V alloy in micro cutting conditions

In this study, a number of turning operations were performed in micro conditions at very high cutting speeds (up to 1400 m/min). At a wide range of depth of cut and feed values, the variations in cutting forces and surface quality were investigated. Also considering nose radius and edge radius of the cutting tool, the minimum depth of cut and feed values were selected as 5 mu m and 0.25 mu m/rev, respectively. The test results show that in case the depth of cut and the feed values are smaller than the nose radius and the edge radius respectively, passive force increases. If the passive force also is greater than the tangential force, ploughing occurs during cutting process. This case deteriorates the surface quality. It is also found that there is a critical feed value for the minimum Ra and that this value is f/Re = 1. (C) 2018 The Authors. Published by Elsevier Ltd.