According to the requirements of the machined workpiece and the actual cutting conditions, the four cemented carbide face milling cutters with equal pitch are selected, using orthogonal test method, the four factors are studyed ,including spindle speed ,feed per tooth ,axial depth of cutting,radial cutting width, and determining the optimal cutting parameters of the milling tool under the condition of different cutting parameters, to improve processing efficiency and surface quality.

Based on an analysis of the advantages and disadvantages of single-layer and multi-layer BOM structure, and combine

A parameter equation based on cutting edge of ball-end mill is set up by analyzing the parameters of ball-end mill influence the milling force in virtual NC milling process. The relationship among elemental cutting force, instantaneous radial chip thickness and cutting edge length is analyzed, and the dynamic milling force of ball-end mill at arbitrary feed direction is established. The milling force parameter model by quadratic regression equation in different cutting conditions is built. Through experiments in NC machining center and using orthogonal combination and principal components analysis, the regression coefficients are calculated. The correctness of milling force model is testified by experiments. All these can provide theoretical basis for physics modeling and simulation of virtual numerical control milling.

Integration of CAD and CAPP system is always a difficult problem in the research, the reason is that the information expression is not consistent. As the output of the CAD system, STEP standard can provide a unified interface to the CAPP system information extraction. In this paper, based on STEP neutral file part feature information extraction and recognition technology, the output from the CAD geometry STEP neutral file includes geometric characteristics information and manufacturing information, the STEP information was transformed into a format recognized by CAPP system. Based on the above research, the process design system was developed based on the information extraction and storage of parts of STEP system, and the system feasibility was proved.

Aiming at NC milling processing simulation problem, a ball-end cutter milling force model is established, the numerical simulation analysis of aluminum alloy AL2024 milling process is conducted by using the finite element analysis software AdvantEdge FEM. Focus on the Milling force simulation, the size of the milling force is obtained by simulating calculation. Using the same cutting parameters for milling experiment, the results show that simulation analysis of the cutting force values are in good agreement with the experimental results，the milling force model prior established is correct. The research laid a foundation for the perfect CNC milling simulation system.