Research On Tool Wear Mechanism In Helical Milling Of CFRP And Titanium Alloy Using CVD Diamond-coated Tool

In recent years, titanium alloy and Carbon Fiber Reinforced Plastic (CFRP) arewidely used in aerospace field due to their excellent physical and mechanicalproperties. However, they are typical difficult-to-machine materials, so that theirdemand for cutting performance of tool is higher. In this paper, for their hole-makingissue, it is necessary to apply CVD diamond-coated tool to their hole-making and toexplore cutting force and tool wear in helical milling of titanium alloy and CFRP. Themain contents are as follows:Based on helical milling kinematics and response surface method, axial force incutting force is researched. In orthogonal experiment, axial force of each set ofexperiments is conducted regression analysis and variance analysis using SPSS dataprocessing software and impact of cutting parameters on axial force is analyzed.Based on tool wear mechanism in the principle of metal cutting and titaniumalloy machining characteristics, special cutter with TiAlN coating and CVD diamondcoating for helical milling are contrasted to analyze tool wear mechanism in fixedparameters and to explore feasibility of CVD diamond-coated cutting tool machiningtitanium.For anisotropic structure and cutting characteristics, TiAlN-coated special cutterand CVD diamond-coated special cutter for helical milling are employed to cuttingCFRP with fixed cutting parameters, then cutting force and hole quality are analyzed.Next, CVD diamond-coated end mill is conducted orthogonal experiment to obtainthe range of axial force in the process of helical milling, and cutting force,hole-making quality, wear mechanism are researched, so that the feasibility this endmill machining CFRP can be evaluated.