Aiming at the assembly rework and repair problems caused by the poor assembly precision in assembly process of large aircraft fuselage components

the quality control technology for key assembly procedure of aircraft based on preassembly precision analysis is proposed. Firstly

the actual coordinate information of key control characteristic points (KCCPs) of components or in-process assembly parts is preprocessed

including coordinate system transformation

data compensation

data integration and format conversion. Then

according to the assembly process and measured data

an assembly procedure precision model based on measured data is established to perform the pre-assembly precision analysis. Finally

taking the fuselage panel assembly as an example

the laser tracker is used to obtain the measured information of the three-dimensional coordinates of KCCPs

and the processed data are used as the input deviation of the assembly precision prediction model for preassembly precision analysis

so as to realize the quality control of the fuselage panel.