Study On High Speed Milling Of Titanium Alloy TC17

As an excellent kind of material, titanium alloy TC17is widely used in the aerospace, energy,and chemical industries. However, titanium alloy is the typical kind of difficult-to-cut materials. Thereasons for this are as follows: low thermal conductivity, high chemical activity, low elastic modulusand large coefficient of friction with other metal materials. The low productivity and high cost is thecrucial limiting factors for the application of titanium alloy TC17. The cutting efficiency for thetitanium alloys is relatively low, and the actual cutting speed of TC17is still lower than50m/min. Inthis paper, some research works at the high speed milling machinability of titanium alloy TC17hasbeen carried out. The present works aim at studying the cutting force, cutting temperature and surfaceroughness under high-speed milling.The main research works are as follows:(1)The experimental study on high speed milling force of titanium alloy TC17has been carriedout using cemented carbide tools. The influence of cutting parameters and toos wear on cutting forcehas been investigated.(2)The TC17-constantan thermocouple has been calibrated，and the thermoelectric characteristichas been obtained. The effects of cutting speed and workpiece material on the cutting temperature hasbeen investigated. The effect of cutting fluid has been evaluated.(3)Orthogonal and single factor design experiments have been carried out to discuss the relationsbetween tool life and cutting parameters. The empirical equations for tool life have been achieved.The tool life has been improved using oil cutting fluid. The surface roughness analysis in high speedmilling of TC17has been carried out.