Project background: The digital docking assembly technology for civil aircraft components based on Model Based Definition (hereinafter referred to as MBD) is based on the characteristics of aircraft manufacturing and uses digital technology to conduct research on the unique large component structure and section docking assembly process of the aircraft. A modern and advanced new aircraft docking technology formed. It corrects the shortcomings of traditional aircraft assembly process technology, increases the versatility of assembly tooling, reduces tooling manufacturing costs, realizes digital automatic assembly, and greatly improves the assembly efficiency and quality of aircraft. It has been widely used in Boeing and Airbus's new generation passenger aircraft. China Commercial Aircraft has made it clear that it will fully adopt digital component docking and assembly technology in the docking technology of domestic large aircraft to ensure the aircraft's high reliability and rapid market response capabilities. In this context, Shanghai Aircraft Manufacturing Co., Ltd., with the support of the Municipal Science and Technology Commission and the Ministry of Science and Technology, launched a research on the digital flexible docking technology of large civil aircraft components based on MBD. On the basis of breaking through the core key technologies in aircraft docking, corresponding solutions and technical application platforms will be formed. Introduce and develop a number of MBD-based digital process planning tools and supporting environments, and establish an integrated system for 3D digital process design and applications. A complete set of software and hardware integration system applied to aircraft docking is developed and applied to the development process and future mass production of ARJ21 regional aircraft. Digital technology runs through the whole process of aircraft docking to realize digitalization, automation, flexibility and integration of aircraft docking, so as to improve the quality and efficiency of aircraft docking in China.
Research content: This project aims at the technical status of developed Western aviation countries. With the purpose of improving my country's aircraft docking technology, combined with the development of the ARJ21 regional aircraft and the C919 passenger aircraft, and on the basis of fully studying and analyzing the structural form of modern aircraft docking and internationally advanced docking technology, Taking the digital docking assembly system as the object and using the digital design technology based on MBD as a means, the assembly process design process for flexible docking of large aircraft components in a digital environment has been straightened out. A reasonable process layout is planned and combined with the three-dimensional digital model of the aircraft to achieve high-efficiency and high-quality digital design and virtual simulation of the aircraft component assembly environment, assembly platform and assembly process in a three-dimensional digital environment. Through key technical research, we developed a digital docking assembly platform for civil aircraft components and successfully passed the verification of the wing-body docking project of the ARJ21 regional aircraft, realizing the wing-body docking of a civil aircraft for the first time in China.
Application promotion: The project research has achieved a series of results, including key technology theoretical research reports, software platforms, standard specifications and guidelines, etc., and supported by various results, a relatively complete MBD-based digital docking technology system for civil aircraft has been built., laying the foundation for the digital docking development of large passenger aircraft. A digital docking process tool collaborative design platform based on MBD was built, and a three-dimensional digital design system and simulation system based on assembly site scenarios were established to realize the simulation and verification of the aircraft 3D virtual assembly process. A digital docking platform for civil aircraft wings and bodies was built and successfully passed the engineering verification of 106 ARJ21 regional aircraft, greatly improving the docking accuracy, reducing the labor intensity of workers, and shortening the docking time by more than 60%. It was applied in batch production. Based on this, a planning plan for the digital docking production line of the C919 passenger aircraft was formed, providing technical support for the digital docking assembly of components of large passenger aircraft.