Analysis Of The Influence Of Three Dimensional Shape And Direction Of Milling Surface Texture On Its Wear Resistance

Milling is one of the commonly used methods in mechanical production.Due to the unique edge line structure characteristics of ball end milling cutter,the threedimensional morphology formed after milling has an important impact on its wear resistance in service.At present,the research on milling surface mainly evaluates the surface quality through two-dimensional roughness parameters,but the research on surface wear resistance is less,and is limited to the analysis of single threedimensional roughness parameters on wear resistance.Therefore,through the surface texture direction and three-dimensional roughness parameters,this paper studies the wear resistance of milling surface,The following work has been done:Firstly,the theoretical model of the surface topography formed by high-speed ball milling was established,and the maximum residual height of the surface and the feature height of the micro unit edge line were calculated analytically.The analytical model of the contact area of the bump wear process was established,and the threedimensional roughness parameter characterization system was established according to the three-dimensional morphology characteristics of the surface texture.According to Hertz's elastic contact theory,the contact pressure model and the wear depth model are proposed.Secondly,based on the Archard wear model,the subroutine is written in FORTRAN language,and the wear simulation process is proposed by combining with umeshmotion module and adaptive mesh technology,and the finite element wear simulation model based on the reciprocating sliding wear process of different texture surfaces is established.The wear mechanism of different surface texture and the effect of different contact distance on the wear resistance were analyzed.Then,after analyzing the change rule of three-dimensional roughness parameters with texture direction and offset distance,the data of two kinds of surface textures are combined,and the correlation degree between three-dimensional surface roughness parameters and wear amount is quantitatively analyzed according to the gray absolute correlation degree theory The three-dimensional roughness parameters of the combined texture surface with greater wear resistance.The wear prediction model is established by using nonlinear regression analysis method.Finally,the machined surfaces with different texture directions are obtained by changing the feed direction of each tooth of ball end milling cutter in high-speed milling,and the causes of surface texture offset distance are analyzed.After discussing the change rule of 3D roughness parameters with texture direction,the correlation between 3D roughness parameters and wear resistance is analyzed,and then the theoretical prediction model is established The results show that the error between the predicted value and the experimental value is small,so the model is of great significance to predict the wear amount and improve the surface wear resistance.