Cooling Effects of Cold Mist Jet with Transient Heat Transfer on High-Speed Cutting of Titanium Alloy

Abstract

High cutting temperature will lead to a short tool life and a poor machining quality during titanium alloy machining. High efficiency cooling methods are always required to reduce the cutting temperature. In this paper, heat transfer experimental platform was set up and one-dimension heat transfer model was established to get critical heat flux (CHF) used to evaluate the cooling capacity of the cooling methods. The effect of cold mist jet (CMJ) was evaluated by transient heat transfer tests and titanium alloys cutting experiments, comparing with cold air jet, flood cooling and minimum quantity lubricant. The experimental results revealed that CMJ with a high CHF has a stronger cooling capacity than other cooling methods and has greatly reduced the cutting temperature in high-speed cutting of titanium alloys. And tool life and surface quality have been both improved with CMJ. This paper offered a way for evaluating the cooling effects of different cooling methods with heat transfer experiments.