Influence mechanism of milling speed on TC4 titanium alloy surface integrity in high-speed milling

By the experiments of high-speed milling of TC4 titanium alloy, the influence of the milling speed on machined surface integrity is investigated. The two-dimensional simulation of TC4 titanium alloy high-speed milling process is carried out by AdvantEdge, which is a professional metal-cutting processing finite element software. The temperature field distribution at different milling speeds and the effect of the milling speed at the cutting temperature on the rake and relief faces are obtained. Based on the simulation results, the influence mechanism of the milling speed on the surface integrity in the high-speed milling of TC4 titanium alloy is analyzed. Results show that the highest temperature in the cutting zone locates on the tool-chip interface at a distance of 0.01~0.02 mm from the tool tip. Generally, the influence of the milling speed at the cutting temperature is significant. The cutting temperature increases with the milling speed, but the cutting temperature decreases when the milling speed reaches 301 m/min.