A Prediction Method of Aircraft Field Assembly Accuracy Based on Measured Data

Abstract

The invention discloses a method for predicting aircraft on-site assembly accuracy based on actual measured data, and relates to the technical field of aircraft assembly. The coordination constraints of each part in an assembly unit are converted into anchor point constraints, and multiple anchor points are selected on each part. , use digital measuring equipment to measure the positioning deviation of each positioning point, establish a positioning analysis model according to the positioning point, and calculate the pose deviation of each part according to the positioning deviation, calculate the position deviation at the key point according to the pose deviation, and follow the assembly Sequentially combine the position deviation of the current part with the positioning deviation of the next part as the positioning deviation of the next part, and input the positioning deviation into the positioning analysis model to obtain the pose deviation, until the analysis of all parts is completed, and the assembly deviation required by the design is obtained, namely Assembly precision. The invention solves the problem that the process assembly accuracy cannot be predicted in the on-site assembly stage of the aircraft, and provides a technical basis for improving the success rate of one-time assembly of the aircraft and reducing assembly rework and assembly scrapping.

Description

technical field [0001] The invention relates to the technical field of aircraft assembly, in particular to a method for predicting the accuracy of aircraft on-site assembly based on actual measurement data. Background technique [0002] In the process of aircraft assembly and production, although process designers are in the process design stage, they control and optimize the assembly accuracy of key processes of aircraft products by adjusting the assembly sequence, positioning reference, assembly tolerance and other assembly processes. However, in actual assembly operations, due to practical factors such as tooling errors, assembly deformation, and part manufacturing deviations, aircraft products do not meet the design requirements after assembly, and incidents of assembly rework and assembly scrapping occur from time to time. [0003] At present, the measures and means of domestic aircraft manufacturers to control the assembly quality are mainly concentrated in the assembl...

AI Technical Summary

Problems solved by technology

However, in the stage of aircraft on-site assembly and production, there is a lack of effective precision prediction control methods. In addition to leaving assembly margins for certain processes for "installation and adjustment", most of the process assembly is in a "trial assembly" state, resulting in Unnecessary assembly rework and tooling adjustments reduce assembly productivity

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