Study On High Feed Milling Of Titanium Alloy

Titanium alloy is a kind of difficult-to-cut material while it is widely used aerospace industry.Low cutting efficiency, severe tool wear, poor dimensional accuracy and surface quality seriously restrict the application of titanium alloy in the aerospace industry. High feed milling is one of the advanced technologies to improve the rough machining efficiency of titanium alloys and other difficult-to-machine materials, but its cutting mechanism is different from conventional milling and still needs further research. Combined with the finite element technology, analyze its mechanism. In this paper, TC18 titanium alloys were as the research objects, and investigated cutting parameters on cutting force, cutting temperature, tool life and tool wear through carrying out fundamental experiments of high feed milling. The main research works were as follows:(1) The simulation process of high feed milling of titanium alloy was established by finite element software Deform-3D. To study the influence of feed per tooth and cutting speed on the simulation results and verified by experiment.(2) Experimental study on high feed milling of TC18 with indexable inserts was carried out, and investigated cutting parameters on cutting force and cutting temperature. High feed milling power prediction model was established, and investigated the influence of bottom edge length on cutting force.(3) Investigated feed per tooth, cutting speed and workpiece material on the tool life. Then the tool wear morphology and tool wear mechanism of two typical cutting tools used in high feed milling of titanium alloy was observed by SEM(scanning electron microscope). All the results established the foundation for optimizing cutting tools used in high feed milling.