Research On Tool Path Planning For Complex Surface Machining

With the rapid development in the manufacturing field of aerospace,automobile,nuclear power and shipbuilding,higher demands are placed on the functions and appearances of various industrial products.Therefore,a large number of industrial products with complex surfaces have emerged.The processing of such parts are mostly completed with advanced CNC machining centers.As the core of CNC machining process,it is the planning of tool path,which directly affects the efficiency and the quality of CNC machining.Therefore,based on the consideration of processing efficiency and quality,this paper optimizes and improves the existing methods such as Iso-Scallop Strategy,and proposes a new algorithm for the selection of the main tool path.The simulation study is carried out.Compared with the comparative method,the comparative analysis shows that the new method is efficient and superior.This paper summarizes the research on the tool path of the existing surface machining and finds that the Iso-Scallop Strategy is more widely used,but it also has the problem of simple and unreasonable selection of the main tool path.Therefore,the further study has been done,and the method of choosing the initial trajectory of curvature division has been put forward.The results of simulation and comparison with the original method show that the method has better processing efficiency under the requirement of machining accuracyIn this paper,the interference problems in the tool path planning are studied.The main problems and the solutions to the current interference are analyzed.From the viewpoints of the efficiency of the interference detection and the way of avoiding the interference,a mesh model is proposed to create K-D tree model and tool discretization of two aspects of research methods,greatly improving the efficiency of the detection of interference,to avoid the way to adjust the angle of the tool shaft were analyzed.Finally,the simulation results show that the method is efficient and effective.In this paper,a typical curved surface part impeller is selected and studied by the method described in this paper.The numerical simulation is carried out based on VERICUT.According to the simulation results,it is found that the method can meet the design requirements and prove the correctness and feasibility of the method.At the same time,the actual processing of the DMU50 machining center owned by the laboratory was carried out.At the same time,the actual processing of the comparative method was also carried out.The comparison of the obtained physical properties and the processing efficiency and quality proved the superiority of the method.