Physical Simulation Base On NC Milling Machine

NC milling machining is of importance in the machining process. Milling has the feature of multi-edge interrupted cutting and alter-thickness machining. With the development of modern manufacture technology and new material,cutting-tools,process and new equipment, it is necessary to research NC milling physical simulation furthermore. Nowadays, most of the machining simulating system refers to the ideal geometry graphic simulation, and seldom considered of the physical simulation of controlled object features and the variation characteristics. However, physics simulation can reveal the physical nature, time-consuming and cost-consuming cutting experiment are avoided. The research of cutting force and workpiece surface roughness in NC physical simulation based on XKA714B/A machine tool is presented. The question based on a experiment is presented in the chapter two of this paper: there is a difference between the value calculated by experience formulation in every direction force and the value measured in practice. The mathematical model is established based on steady state value of cutting force in X,Y,Z, the experiment is validated also. Though there are many kinds of the simulation of surface roughness and contour in cutting, the factor considered,machining means used and mathematical and physical ways employed are different, so the simulating model and using range are different. The technique in this field is not mature yet, especially in our country, the research of physical simulation is less. The surface roughness forecast model of the relationship of contour max height Rz and cutting parameter v_f,a_e ,v_c is established and tested in the chapter three of this paper. A GUI of physical simulation with MATLAB is presented in the chapter four. It can optimize bi-direction choice of forecasted object and related parameter. The forecasting value of milling force and surface roughness is obtained when specified parameter is input. According to forecasting value, the chosen parameter value can be adjusted appropriately. Thus, bi-direction optimized choose is achieved. The GUI is expected that it is helpful for cutting parameter in practicing milling machining optimizing and part surface machining quality improving.