Investigation of the Effect of Different Cutting Conditions on Machining Performance in Parting Off Operation Applied to Ti6Al4V Alloy on CNC Lathe

Türkçe

Although every product produced on a lathe is subjected to parting off operation at least once, there has been almost no study on this operation. In this study, Ti6Al4V alloy, which is difficult to machine, was chosen as the work piece material to investigate the parting off operation in a confined space. The effects of different cooling conditions (dry cutting and conventional cooling), different cutting speeds (30 and 50 m/min) and different feeds (0.01, 0.02, 0.03 and 0.04 mm/rev) on surface roughness (Ra), tool wear (Vb) and chip morphology were investigated. In the experiments, it was observed that coolant application is much more vital than in open machining operations, especially in terms of tool wear, with improvements of up to 90%. The increase in cutting speed had a negative effect on Ra, but not a positive one, in contrast to open-machining operations. The increase in feeds increased Ra and Vb values, similar to the open-machining operations. In addition, the increase in feeds resulted in a shorter and more controllable chip form. These results show that machinability studies should not be limited to open-machining operations such as turning and facing, which are easy to implement. It is thought that solving the many problems encountered due to the nature of the process in confined space operations with very different and challenging conditions will add a new dimension to the studies on machinability.