Method for predicating surface roughness and surface topography simulation of car milling compound machining

A method for predicating surface roughness and surface topography simulation of a car milling compound machining comprises the following six steps: step one, a modeling of a unified cutter position coordinate model of a whole cutter and an inserted blade cutter; step two, a modeling of the geometrical movement trace of a milling cutter cutting edge; step three, a consideration of influences of the vibration of the cutters to a workpiece surface morphology; step four, a microscopic surface morphology representation method; step five, a car milling compound machining basic structure function; step six, a simulation algorithm example and an orthogonal test method. The method combines the geometrical simulation and the physical simulation together, static and dynamic deformations which are produced when cutters cut under stress are fully considered, models for general car milling compound machining method of any angle are theoretically built, and a surface method of the roughness calculation of the car milling compound machining is deduced. The method for predicating surface roughness and surface topography simulation of the car milling compound machining has good practical values and broad application prospects in the technical field of machinery manufacturing processing.