Surface Topography Simulation And Surface Texture Control In Ultra-precision Milling

To the ultra-precision machining parts, the surface topography will affect the surfaceroughness and other surface qualities. This paper builds an algorithm aiming at simulating thesurface topography under the circumstance of ultra-precision machining, while meeting thecalculation time and the accuracy. Based on this algorithm, the research on the relationshipbetween machining parameters and surface topography is studied; finally use an appropriatemethod to control the surface topography. Main research contents of this paper are asfollowings.A3-dimension surface topography simulation algorithm of ultra-precision milling isintroduced. Blade point clouds, for the research object in this paper, are consisted by a serialof blade points according to calculating the instantaneous locations of static discrete bladepoints in machining process. Meanwhile the servo bounding box is constructed to selectingsampling points on the topography surface. The comparison between simulation results andmeasurement pictures shows that the algorithm can clearly illustrate the distribution of scallopin different directions, as well as the influence on the topography caused by initial cutterphrase.Based on the algorithm, study the relationship between the surface topography and toolinclination, initial cutter phrase, and federate pre tooth separately. Meanwhile, two importantsurface textures which contribute the significant factors to the surface are defined in the paper,and study the influence of the pervious machining parameter on these two surface textures.The surface texture control method is obtained by based on the above theory from twomain ways: control the machining parameters, control the tool path in none cutting part.Firstly, assure the target surface topography, then plan the machining parameters and tool pathin none cutting process, finally obtain the specific surface topography by control the surfacetexture.Hence, it provides a method to the research of surface topography composition in theflied of ultra-precision milling machining.