复杂曲面等残留高度螺旋刀具轨迹生成方法的研究

Research on Spiral Tool Path Generation Method of Constant Scallop Height for Complex Curved Surface

复杂曲面加工中,刀具轨迹规划是数控加工技术的关键,它的优劣性将直接影响曲面加工的精度和效率。在总结等残留高度法和螺旋走刀模式的特点基础上,对等残留高度法进行改进,提出了基于等残留高度法的螺旋加工模式刀具轨迹生成方法,给出了该方法的生成刀具轨迹的流程。该方法解决了等残留高度法轨迹线零散、轨迹不光滑、不利于高速加工的缺点,实现了加工轨迹光滑连续,在确保加工精度的前提下,提高了曲面加工效率。最后,利用此方法对叶片零件加工实例进行了刀具轨迹规划,在UG加工模块中完成了加工仿真,验证了方法的优越性。

Tool path planning is the key of NC machining technology,and its advantages and disadvantages will directly affect the accuracy and efficiency of surface machining. At the conclusion of the scallop height method and spiral tool modes on the basis of equivalence,residual height method was improved,and puts forward the method of spiral machining mode of tool path generation based on constant scallop height method,the tool path generation method of the process is given. This method solves the scallop height method path,scattered path is not smooth,not conducive to the realization of high speed machining defects,machining path smooth and continuous,in the premise of ensuring the machining accuracy,improve machining efficiency.Finally,this method is used to process the tool path planning of the blade parts machining. The machining simulation is completed in the UG processing module,and the superiority of the method is verified.