| Metal cutting is an important link in modern machinery manufacturing industry.In modern production,the effective chip control is very important,and the most widely used chip breaker is set up on the surface of the tool chip.In order to improve the service life of cemented carbide tool and improve the cutting effect of cutting tool turning titanium alloy,the object of this paper is the boss of three-dimensional chip groove,aiming at the design and optimization of the shape structure of the boss of chip groove,to improve the cutting effect.The main contents of the paper are as follows:(1)Firstly,in this paper,the chip formation mechanism of metal cutting,chip breaker groove development history and present situation,the surface texture research status,cutting tool cutting simulation research for the theory summary,and has carried on the detailed introduction,the purpose is to through the study knowledge,in turn,for carbide cutting tools of chip breaker groove of the convex model is modified to provide theoretical basis.On the basis of comparing the difference of chip breaking effect with or without boss chip breaking groove,the comprehensive influence of spherical,diamond and cylindrical boss textured cutting tools with the same thickness on cutting force,cutting temperature,chip breaking effect and tool wear range is further analyzed.The tool was modeled with Solid Works software and imported into Deform-3D for simulation analysis.(2)Secondly,the influence of boss shape on cutting is analyzed under the two cutting parameters of different role of boss in chip breaking process.The cutting tests of the chip breaker cutter with spherical,diamond,cylinder and no boss are carried out,and the cutting force,cutting temperature,chip stress and strain and the wear amount of each boss cutter in the cutting process are compared.It is found that the increase of cutting force and the decrease of cutting temperature are caused by adding boss in the cutting process of titanium alloy Ti6Al4 V,and the stress and strain of chip is relatively large,the boss wear is smaller,the chip breaking effect is better,and the tool life is longer.(3)finally,find out in a certain cutting parameter,cutting speed,feed processing range,the better the effect of chip shape of convex ball machine tool,to optimize the geometric parameters,with convex platform is apart from the main cutting edge distance and convex platform height is the independent variable,control variable in more detailed simulation test,through the analysis of cutting force and cutting temperature change,In order to find relatively better geometric parameters.Based on de FORM-3D finite element analysis software,the cutting force and cutting temperature of titanium alloy turning with carbide tool were measured by orthogonal simulation experiment.The range analysis was used to explore the influence of the geometric parameters of the boss on the above indexes,and the prediction model of cutting force and cutting temperature was established by using multiple nonlinear regression method.The mathematical model of multi-objective optimization was established and solved by comprehensive balance method,response surface method and multi-objective simulated annealing algorithm,and the results were compared.The results show that the function value of simulated annealing algorithm is lower under the three methods,and the optimal parameter solution of the model is A=0.26 mm,B=0.35 mm,C=0.09 mm.The solution of the equation is simulated again,and the overall error is about 4%,indicating that the above analysis results can provide reference for practical application. |
