Evaluation of Energy Aspects in Machining performance of Ti6Al4V in CNC turning using CBN Insert

Machinability is a term usually employed to describe the material removal capability with an accepted finish at a relatively low cost. The machinability study of titanium alloy has been increasing and is acquiring more significance as it can produce stress-free and high-quality surface. Machining of titanium alloy is an interest to the researchers to increase its usability in industrial parts. It is difficult to machine alloy due to its favorable characteristics like preventing heat to pass through them, forming atomic bonds with the cutting tool material and high tensile strength. Metal cutting scientists are working hard to overcome the difficulties and hence associated temperatures and stresses generated during machining. The chapter deals with the machining performance evaluation of Titanium Biomaterial Ti6Al4V in CNC cylindrical turning using CBN insert. The analysis of machining forces, surface roughness and tool wear is by taking into consideration the workpiece machining length and Acoustic Emission (AE) characteristics are correlated with the machining conditions to monitor the condition of the CBN tool insert. It was found that resultant cutting force values were low up to 60 mm cutting length. The lowest surface roughness value, Ra observed was 0.9 µm at 15 mm cutting length and the major flank wear on flank face, VB was observed 0.2 mm at 30 mm cutting length. The AE signals were correlated with the number of passes and it was found that there was reduction in AE energy and AE count after four number of passes.