Study On Cutting Characteristics Analysis And Cutting Parameter Optimization In Helical Milling Of Titanium Alloy Using Ball End Milling Cutter

With the development of material science,more and more new materials emerge as the times require.These new materials are widely used in aviation,medical treatment,chemical industry and other fields.However,the processing quality and processing cost of traditional processing methods in the actual processing of new materials are becoming more and more significant.Therefore,in this paper,ball end milling cutter and helical milling technology are introduced to making holes on titanium alloy,a new typical difficult-to-machine material,and the machining process is deeply studied.The main research contents are as follows:Based on the technological characteristics and kinematic principle of helical milling,the test platform of titanium alloy helical milling in ball end milling cutter is built,and the full factor test of cutting parameters is carried out.During the experiment,the cutting force signal and cutting temperature are collected respectively,and the effects of cutting speed,feed per tooth and cutting depth each turn on radial cutting force,axial cutting force and cutting temperature are analyzed.The tool wear is observed at the same time,and the microscopic state of tool wear is analyzed by electron microscope and energy spectrum analysis,and the hole quality is evaluated.Based on the experience modeling method of cutting force and the influence of cutting parameters on cutting force,the quadratic regression model of axial cutting force of helical milling hole of ball-end milling cutter and the regression model based on empirical formula are established,and the accuracy of the models are tested.The quadratic regression model of radial cutting force and the quadratic regression model of cutting temperature for helical milling hole of ball end milling cutter are established,and the two models are verified respectively.Aiming at the defects of traditional particle swarm optimization algorithm,the expression of weight is improved,and asynchronous model and mutation factor are introduced.Taking cutting efficiency,axial force and cutting temperature as optimization objectives,surface roughness and cutting parameter range as constraint conditions,the traditional particle swarm optimization algorithm and improved particle swarm optimization algorithm are used to optimize the three cutting parameters under the stable cutting condition of helical milling hole of titanium alloy in ball end milling cutter,and the optimization results are compared and verified by experiments.The above research enriches the helical milling technology and is of great practical significance for its early application in the field of engineering.