Optimization Of Milling Tool Parameters And Experimental Research On Titanium Alloy TC11

Titanium alloys are widely used in aerospace,automobile,and ship fields because of their low density,high specific strength,and strong crack propagation resistance.However,titanium alloys have the characteristics of high strength,high toughness,low elastic modulus,and poor thermal conductivity,which leads to problems such as large cutting force,excessive cutting heat,and severe tool wear.To solve these problems,it is necessary to select reasonable cutting tools and cutting parameters.In this paper,the tool selection,cutting force,cutting vibration,tool wear,and machining process of milling TC 11 titanium alloy is studied by three-dimensional finite element simulation and milling experiment.The research content mainly includes the following aspects.Firstly,milling cutter material and shape are selected according to titanium alloy characteristics.,and the simulation model of milling TC11 titanium alloy under different milling cutter parameters are established in ABAQUS software;The simulation results of three-dimensional cutting force are obtained by milling simulation test,and the simulation results are compared with the test results to verify whether the simulation results are accurate or not.A prediction model is established based on the simulation results of three-dimensional cutting force,and the significance test is carried out;The parameters of the end milling cutter suitable for machining TC11 titanium alloy are optimized by genetic algorithm.Secondly,a milling experiment for TC11 titanium alloy was carried out,including cutting parameters which have an important influence on cutting force,cutting vibration,and tool wear;The changing rules of milling TC11 titanium alloy with an optimized milling cutter and conventional milling cutter is obtained by a comparative analysis of cutting force and cutting vibration collected in the experiment;The optimal cutting parameters are selected according to the cutting force test results.Finally,a study on the tool wear of ordinary milling cutters and preferred milling cutters ware carried out,the tool life and wear morphology of two kinds of milling cutters are analyzed;The wear mechanism of the optimal milling cutter is studied;The influence of end milling cutter parameters on tool wear is compared;The tool wear patterns under dry cutting,cryogenic minimum quantity lubrication,and liquid nitrogen cryogenic cooling were studied and the effect of cooling lubrication on tool wear was analyzed.