关键词: 飞机结构件, 平顶筋, 分治思想, 骨架计算, 刀轨生成, 数控加工

Abstract: To improve the efficiency and quality of NC machining programming for complex ribs top planar surface in Aircraft Structural Parts (ASP),a skeleton computation method with sub-domain division was presented based on idea of divide and conquer,and the tool paths for top planar surface of ribs in Aircraft Structural Parts(ASP) was generated to solve the problems of NC machining programming such as low efficiency and unstable quality.A multi-level model of planar domain consisted of integrated domain,branch sub-domain and element domain was proposed.Secondly,after subdomain division According to the multi-level model,the subdomain was made for planar domain,and the element skeleton within element domain was computed by iterative tracking step by step.By connecting element skeleton,the skeleton of integrated domain was obtained.By utilizing the skeleton of integrated domain,NC machining tool path for top planar surface of ribs was generated.Examples were given to illustrate the validity and effectiveness of the proposed method.

Key words: aircraft structural part, rib, divide and conquer idea, skeleton computation, tool path generation, numerical control machining