大尺寸测量技术在航空制造业中的应用及关键技术

当前航空制造业朝着高精度、低成本、柔性化、数字化的方向快速发展,飞机零部件的加工和装配越来越依赖于大尺寸测量技术和系统提供的技术保证.因为一方面,飞机产品零部件尺寸越来越大、整体结构越来越多而精度要求越来越高,尤其是其中的关键特性[1].另一方面,在航空产品制造的全球协作精益化生产要求的背景下,要求大型复杂零部件能在全世界各地生产并能够无缝集成、统一装配,做到"统一协调、提前预见问题、少无返工"[2].同时,随着航空企业生产数字化程度的提高,要求形成产品设计、工艺规划、制造、检验等环节集成于一体的产品闭环制造数字链,对生产的各环节进行有效的沟通和反馈,保证产品的制造装配质量和产品制造周期中信息的统一性和交互性[3].     

Approach to Interference Aircraft Automatic Riveting Process Control of Drilling and Riveting

Interference fit riveting is an effective way to improve the fatigue life of aircraft. The accurate control of riveting interference of aircraft automatic drilling and riveting equipment is achieved by process parameters including upsetting force and upset head height. It is valuable for aircraft manufacturing engineering. An approach to interference riveting process control based on the analysis of interference riveting stress field is proposed. According to assembly structure, the upsetting force is calculated by the material property and interference fit level, and the upset head height is deduced by the upsetting force. The experimental result shows that the interference fit level can be controlled accurately by the upsetting force and upset head height, and then, the quality of aircraft auto- matic riveting can be improved. The proposed approach is verified by the good match between the predicted result and the experimental result.     

基于轻量化模型的飞机装配过程虚拟仿真方法

飞机结构零件数量巨大、结构复杂、协调部位多,飞机装配在飞机制造过程中不仅劳动量大,而且质量要求高、技术难度大.因此,飞机装配在飞机制造中占有十分重要的地位,飞机装配工作量约占整个飞机制造总工作量的50％ ～60％[1],因此如何提高装配效率、降低装配劳动成本,是缩短整个飞机研制周期的关键[2-3].随着飞机数字化设计制造技术的快速发展,虚拟装配仿真技术已广泛应用于航空制造业,该技术的应用明显加快了装配工艺方案制定和实施的速度,有利于优化装配工艺方案,从而有效保证飞机的装配质量.