【摘要】 针对国内航空企业飞机结构件数控编程中存在的重复工作量大、效率低、质量不稳定、规范性差等问题,通过面向多主机厂推广基于特征的数控编程技术,切实提高飞机结构件数控编程的效率与质量。首先概述了基于特征的快速程编(FBM_NUAA)系统的整体架构,并且介绍了基于特征的数控编程技术在多家主机厂中的推广与应用情况,以及前期推广中遇到的问题,并提出了解决方案。根据多主机厂多机型过百项飞机结构件的实际应用结果表明采用基于特征的快速程编系统进行数控编程,刀轨平均自动生成率超过90%,编程时间较传统编程方式平均缩短70%以上。更多还原

【Abstract】 The most traditional way for aircraft structuralparts CNC programming in current manufacturing industry is artificial-dependent based on existing commercial CAM systems which will induce problems like massive repeat workload, low efficiency, unstable quality and lack in standard. Feature based CNC programming technology has been proved to be practical in facilitating automation and standard by integrating geometry with standard machining knowledge. In this paper, the framework of a feature based CNC programming system named FBM_NUAA is first summarized. Then challenges and proposed solutions during the wide application of feature based CNC programming technologyin aviation enterprises are introduced. FBM_NUAA system is used for automatic CNC programming in more than 100 real aircraft structural parts belonging to different kinds of airplane in different aviation enterprises. The result shows that more than 90% tool paths are generated automatically and the total time for CNC programming is reduced to 70% on average.更多还原