Research On Cutting Force And Roughness Of High-speed Milling Corner On Plane And Inclined Plane

During the development of the die&mould industry, high-speed machining complicated cavity had been an indispensable part of high precision industry presented by Aerospace, automobile, medical devices. A striking feature of complicated pocket mould is that many diversified and irregularity corner exists in cavity. During the high-speed machining pocket corner, the mesh area of cutting tool and workpiece suddenly increase when the tool is running around the corner, Which result in abrupt increasing of cutting power and vibration in cutter-workpiece. All these cause frequent change of load and vibration in HSM of pocket corner, resulting in tool wear and breakage, which affect the quality precision of surface. Therefore, it has a practical meaning to research technological test of HSM of pocket corner.In this paper, P20die steel is used as materials, Cutting power and3-D surface roughness of inside corner while conduct high-speed milling corner on30°cant and plane are researched through theory analysis and technological test.Firstly, analyzing and designing cutter path strategy of HSM of corner on plane and30°ant. Character for3-D surface roughness describing surface topography is illustrated in detail, with regulating cut-off wavelength, lens, combined optical field of OLYMPUS laser scanning confocal microscopy, application of LSCM in3-D surface roughness is carried out. Lay a foundation for subsequent detection of three-dimensional surface quality.Based on the research on cutting force of high-speed milling corner on plane, orthogonal experiments are conducted to study the influence of axial cutting depth, radial cutting depth, spindle speed and feed speed on3-D surface roughness of inner corner on plane.Then, cutting force and3-D surface roughness of inside corner for plane and30°ant are researched by orthogonal experiment, the influence of axial cutting depth, radial cutting depth, spindle speed and feed speed on which is obtained. The predictive mathematic models of milling forces and3-D surface roughness for inside corner based on the cutting Parameters were established by using partial least-squares regression, and the forecasting formulas have significant. Building mathematical model for floor plane scallop height of milling inside corner on30°ant through geometrical analysis method, surface topography of floor plane on30°ant is researched deeply. With single-factor tests, the influence of cutting parameters such as axial cutting depth, radial cutting depth, spindle speed and feed speed on floor plane line roughness of milling inside corner on30°ant.In order to achieve the maximum material removal rate as single object, the optimization model of cutting parameters which the constraints are the technical requirements of the milling forces and3-D surface roughness is built. And the optimization model of double-objects are presented by minimize the milling forces and3-D surface roughness is established also. Using genetic algorithm, combined with MATLAB GA toolbox, optimal combinations of milling parameters under single object and double-objects above are obtained.