Research On The Tool Wear Mechanism Of Cemented Carbide Ball End Mill Machining Titanium Alloy

Titanium alloys are extensively used in the key structure components of militaryaircraft, aircraft engine and the hydraulic system because of their excellent properties,and most of these structure components include complex curved surface. However,Because of low thermal conductivity, low modulus of elasticity and high chemicalactivity which lead to rapid tools wear and low machining efficiency. It is veryimportant to find out the tool wear mechanism of ball end milling machiningtitanium alloy because of the ball end milling is widely used in the curvedsurface.This paper takes the funding of the nation natural science foundation of china”Study on wear resistance mechanism of miso-geometric features of cutting tool andits influence on high speed milling surface”as the supprot. Based on the millingtitanium alloy as the research object, a comprehensive analysis of progressive toolfailure processes and cutting force changing regularity when ball end millingmachining cant and curved surface.Finally, The tool wear prediction model isestablished.Firstly, the tool orientation and machining inclination angle are defined. In orderto provide theoretical basis for the size and shape of workpiece, the model ofmaximum effective cutting radius and cutting layer parameters is established of theball end milling based on the geometric model of ball end milling machining cantand curved surface. Based on the cutting force experiment platform in machiningcant and cruved surface with ball end milling, the cutting parameters, surfacecurvature, the tool wear effect on the cutting force are investigated.Secondly, Based on the finite element simulation software Deform-3D, thethree-dimensional numerical simulation model of ball end milling machining canttitanium alloy is established, and a comprehensive analysis of cutting parameters andmilling way effect on cutting force and tool wear was investigated. Based on the dynamic simulation of tool wear and experiment, the initial position and diffusionregularity of tool wear are discussed in this paper.Finally, Based on the tool wear experiment of ball end milling machining cantand curved surface, the tools wear morphology and failure evolution process of ballend milling are studied, and the influence of cutting parameters and surface curvatureon tool wear are investigated. In addition, the influence of fix angle and changedangle on tool wear are discussed, and based on the orthogonat test and the leastsquare method, the prediction model of tool wear is established.