Research On Docking Assembly Technology Of Fuselage

Aircraft assembly is the main link in the process of aircraft manufacturing,mainly including three stages: components assembly,parts assembly and general assembly.Docking assembly of fuselage is an important part of general assembly,and the high-precision docking assembly of fuselage is the guarantee of the successful manufacturing and safe flight of the aircraft.At present,automatic docking technology has been widely used in docking assembly of fuselage for foreign aviation enterprises.However,domestic aviation enterprises still use the non-automatic fuselage docking pattern because of technical limitation,resulting in large labor of works and low assembly efficiency.It’s difficult to guarantee the assembly quality and assembly cycle.Therefore,it’s necessary to integrate advanced manufacturing technologies such as flexible jig,digital measurement,NC automatic positioning and assembly simulation to establish a flexible,digitized and automated fuselage docking assembly system,and raise the technical level of fuselage docking assembly in China.In this paper,a certain civil aircraft is taken as the research object.Aiming at the problems such as high accuracy requirement of docking assembly of fuselage,complicated posture adjustment process of fuselage parts and difficult integration of related systems,several key technologies of docking assembly of fuselage are studied in detail.The main research work of this paper is as follows:By analyzing the fuselage structure of a civil aircraft,three-dimensional process design of the docking assembly is completed,reference and assembly process of the docking assembly are determined.Jig form and reference part of the docking assembly of fuselage are determined.The flexible,automatic and digital jig structure for docking assembly of fuselage is designed.Overall structure and adjusting mechanism of NC positioner are designed in detail.Appropriative joint locators and joints are designed.By analyzing the requirements of the jig control system,hardware configuration and control structure of the jig PLC control system are planned.Function module of the control system is designed.The trajectory planning algorithm for posture adjustment of fuselage parts is researched.The function of the trajectory planning module is realized by developing CATIA.Composition and measuring principle of laser tracker system are introduced.The method of constructing the laser tracker measurement field for docking assembly of fuselage is researched.The key algorithm of three-dimensional coordinate transformation is researched.A set of posture adjustment scheme for fuselage parts based on laser tracker measurement is designed.Main content and significance of technology of assembly simulation is expounded.Key technologies of assembly simulation based on DELMIA software are researched.The simulation and analysis of the docking assembly of fuselage are carried out by using the DELMIA software.