A method for predicting and improving the installation qualification rate of aircraft components and machine-surface connectors

Abstract

The invention relates to the field of aircraft parts assembly, in particular to a method for predicting and improving the installation qualification rate of aircraft parts and machine surface connectors, which is used to predict and improve the qualification rate of the installation of the connection parts after the skeleton / skin independent hole making. The actual skin structure size and the assembly relationship with the skeleton, determine the positioning relationship and the analysis object; establish a mathematical model of nail-hole coordination, theoretically analyze the coordination relationship and determine the indicators used to evaluate the installation qualification rate of the machine-meter connector; carry out tolerance analysis Modeling and analysis are carried out to determine the main factors affecting the qualification rate, and the methods of compressing the tolerance zone and adjusting the nominal size of the aperture are proposed to improve the installation qualification rate of the connector. Under the condition of comprehensive consideration of machine tool accuracy and hole making ability, the qualified rate of theoretical calculation and installation is guaranteed to be ≥90%, so as to ensure the installation quality of actual machine-surface connectors.

Description

technical field [0001] The invention relates to the field of aircraft parts assembly, in particular to a method for predicting and improving the installation qualification rate of aircraft parts and machine-surface connectors. Background technique [0002] In the traditional aircraft assembly process, the surface skin and fuselage component skeleton are assembled using the method of "positioning + hole matching + decomposition and deburring". For a small number of initial holes for positioning, use the through-center clip to position the skin on the skeleton during assembly, and match the holes according to the remaining manual scribed or numerically controlled guide holes. There is a lot of manual work in the process of implementation, resulting in long assembly cycle and unstable quality. At present, a new assembly process method is proposed. The component skeleton and the skin are respectively made with end holes on the CNC machine tool, which can reduce the manual scrib...

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Problems solved by technology

[0006] In view of the difficulty in installing the connectors of the existing aircraft components, the accuracy of the hole position cannot be guaranteed, etc., there is currently no reliable means to analyze whether the connectors can be installed smoothly from a theoretical value. The method for the installation pass rate of aircraft parts machine table connectors can effectively improve the accuracy of the nail-hole fit and enlarge the fit gap, improve the assembly pass rate of the bolts, reduce the tolerance requirements for the hole position, and reduce the accuracy of the machine tool and the process. Guarantee the content, greatly improve the processing efficiency, and ensure the qualified processing and smooth delivery of the skeleton and skin

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