Effects of Oil Mist and Air Jet Flushing on Tool Wear in Milling of Ti6Al4V at High Speed

Titanium alloys have been widely used in the aerospace, biomedical and automotive industries because of their good strength-to-weight ratio and superior corrosion resistance. However, it is very difficult to machine Titanium alloy materials due to their poor machinability, resulting in short tool life. The effects of oil mist and air jet flushing on tool wear in the milling of Ti6Al4 V were investigated at a cutting speed of 300 m/min in this study. Tests with various flushing directions of oil mist and air jet during up, and down-cut were carried out. Tool wear and chip shape were measured and analyzed. As a result of these cutting tests and considerations, it was revealed that up-cut with oil mist flushed from any direction and air jet flushed from the side were desirable, and dry down-cut was also desirable.