High-efficiency machining of titanium alloy using combined machining method of driven rotary tool and hale cutting

抄録

A new processing method is needed for achieving high accuracy and high efficiency in titanium alloy machining. It has been reported that driven rotary machining of hardened steel improves the machined surface and processing efficiency. These results suggest that it is possible to realize high-efficiency machining by employing hale machining with a rotary tool. In this study, hale machining was performed using a driven rotary tool, and the effects of different cutting conditions and cutting environments on the machining characteristics were investigated. The results showed that the tool life was longest at a feed rate of 9000 mm/min because the formation and dropping of adherents decreased as the friction distance of the cutting edge decreased. Furthermore, it was clarified that adhesion formation at the cutting edge was suppressed by lubrication with an oil mist in a minimum quantity lubrication environment. This lubrication effect reduces tool damage and adherence at the cutting edge, and makes it possible to significantly extend the tool life and improve the machined surface quality compared to the results in a Wet environment.