Study On Tool Path Optimization And Simulation Of Multi-axis NC Machining

When complex curved surface parts are machined with three-axis NC machine tools, the whole process can’t be finished for just one time clamping.In order to avoid positioning error caused by many times clamping, the process needs using multi-axis NC machine tools. This paper presents an algorithm, named improved equidistant offset method, for the optimization of tool path. The algorithm was embedded into the SIEMENS NX software, and machining simulation was completed for five-axis NC machining integral impeller with VERICUT software. The algorithm not only ensures the tool path of uniform distribution, but also improves the machining efficiency.A typical complex curved surface parts named integral impeller is used in this paper to realizing efficiency optimization and processing machining simulation.First through the method of combining the basic algorithm, a new algorithm is presented in this paper.A secondary development is finished in SIEMENS NX software,the improved equidistant offset method is used in its processing module to realizing tool path editing.Second through the optimization design,the tool path processing efficiency is verified.Finally through the NX Postbuilder to generate NC program, the virtual machine tool simulation is processed in VERICUT software.The feasibility in the impeller machining tool path optimization algorithm is verified though this process. Through the tool path optimization algorithm and the simulation experiments,the processing method of complex curved surface parts is improved and the actual production level is promoted.