Research On Non-interference Tool Path Planning And Implementation Technique For Five Axis Machining Of Impeller

The article combining Zhejiang province key science and technology innovation team "high-end CNC machine tool and its key technology" project (No.2009R50008) scientific research task, carries on the analysis of the impeller processing technology plan, analyses the tool path planning and collision theory, plans non-interference tool path of the impeller machining, generates NC code which the machine can identify through post processing the source document, finally has carried on the simulation process and the processing experiment.In order to planning non-interference tool path of impeller machining, firstly the NC machining tool path planning method and the existing problems are elaborated, research significance and status of the five axis machining of impeller of non-interference tool path planning are introduced in detail. Then the processing technology of the impeller is analyzed, the processing stages are divided, the block, technology base, tool, tool path, cutting parameters are chosen. Then it introduces the tool path planning related notion, Then, the non-interference tool path planning algorithms of rough machining for the flow channels and finish machining for blades are mainly studied. It puts forward the algorithmic methods of tool path generation for rough machining flow channel based on layer cutting method and interference free tool posture angle. The algorithmic methods of tool path generation for blades finish machining based on constant scallop height and interference free tool posture angle and tool spacing are also putted forward. The corresponding algorithms are achieved using VC++, the corresponding paths are generated and interference is avoided.In this paper, non-interference tool path planning of the impeller machining is the core concepts. On the basis of the theory and algorithm of the tool path planning, finally the machining simulation and machining experiments verify the correctness of the path planning. This article affords reference for five axis machining of impeller.