Optimization Research On The Surface Quality Of Titanium Alloy With Micro-textured Ball-end Milling Cutter

Titanium alloy has many advantages,such as high strength,high hardness and good corrosion resistance.It has not only become an indispensable structural material in modern aviation and aerospace industry,but also widely used in medical,mechanical,shipbuilding and other fields.However,with the wider application of titanium alloy,the surface quality of the titanium alloy is not ideal.Therefore,according to the thermal conductivity of titanium alloy cutting process coefficient,adhesive and other shortcomings,the hard alloy dimple texture ball end milling cutter as the research object,studies the crater texture parameter influence on the surface quality of the relationship,and lay a foundation for further optimization of micro texture tool mesoscopic geometry.First,the theoretical analysis of the milling titanium alloy by the micro texture ball end milling cutter is carried out,and the forming process of the processed surface of the titanium alloy is explored.In order to obtain the reasonable micro texture parameters of micro texture ball end milling cutter,a three-dimensional geometric model of micro texture ball end milling cutter is established,and the milling process of micro texture ball end milling cutter is simulated by finite element simulation software DEFORM.The influence of the mesoscopic geometric parameters of the micro texture tool on the cutting force and the cutting temperature is analyzed.With the cutting force and the cutting temperature as the evaluation standard,the optimum parameter range of the mesoscopic geometric feature of the micro texture tool is optimized.Then,through the study of micro texture of ball end milling titanium alloy test,the machined surface roughness,surface residual stress,surface hardening test data were obtained,explore the crater parameters effect on the texture quality of the machined surface,and the milling mechanism is analyzed.The influence of micro-textured tool and non-woven tool on the surface quality of titanium alloy was studied.Based on the above experimental data,the surface quality prediction model for milling titanium alloy with micro texture ball end milling cutter is established.Finally,with titanium alloy machined surface roughness,residual stress,work hardening for optimization of high speed milling of titanium alloy by micro pits texture parameters,finite element simulation parameters selected as constraints,a multi-objective optimization model of parameters optimization in high speed milling of titanium alloy.The optimization results of micro texture parameters were obtained through MATLAB genetic algorithm toolbox.The experiment of milling titanium alloy by universal micro texture ball end milling cutter has proved the accuracy of the optimization results.