Research On Blade Modeling And Multi-axis Machining Tool Path

The precise shape and tool path planning of Complex surface parts is the important guarantee for realizing multi-axis NC programming and high-quality machining.The blade is not only a typical complex surface but also the "heart" of the aircraft engine and its processing efficiency and surface quality have a crucial impact on the performance of the aeroengine.Therefore,this paper aims to study the blade shape and tool path algorithm.The mathematical model of ruled surface blade model is studied based on the NURBS curve surface reconstruction method.For the problem of the excessive strain and the curvature mutation of the blade curve,The spline interpolation method is taken to fit the leaf type values,and the genetic algorithm were used in the MATLAB software to smooth the curve of the blade to improve the accuracy of the blade section line,the overall model of the blade is completed.The machining method of the spiral milling is selected by analyzing the characteristics and technical requirements of the blade structure.The numerical control process is designed by determining the blank forming and the balance distribution,the cutting tool,the walking way and the technological route,and optimizing The roughing cutting parameters.Based on the method of residual height,a spiral milling method of composite surface multi-tool path is proposed.The algorithm of tool path is established by seting up the model of cutting the tool point,walking step,walking distance and knife axis vector,which realize the efficient processing of the blade and avoid the interference before and after the blade edge.The spiral trajectory of the blade is generated by using the NX CAM module,2344VMC vertical machining center dedicated post-processing constructor was developed in the NX/post bulider and generated the NC code is matched with it.Simulation processing system was built through VERICUT software,the feasibility and correctness of the process and tool path are verified.Geometric modeling,processing technology and helical milling of the blade are studied in this paper to obtain the trajectory of the blade with high quality and efficiency,the feasibility of the theoretical algorithm is verified by the optimization simulation,which effectively improves the shape of the blade precision and processing efficiency and provides a theoretical reference for the realization of CAD-CAPP-CAM-CNC integrated programming module for complex surface and blade.