Aircraft internal complicated structure boundary reverse leading method adopting digital measurement

Abstract

The invention provides an aircraft internal complicated structure boundary reverse leading method adopting digital measurement to achieve calculation, measurement and boundary reverse leading. Using an aircraft designed coordinate system as reference, the method comprises the following steps: data is acquired through digital measurement system, and an aircraft coordinate system is built by adopting an optimal fitting algorithm; a measurement head of the digital measurement system is adopted to measure the surface of a part near a boundary to be reversely leaded; aircraft part three-dimensional digital analogies are combined to extract a vector direction in the boundary, and a space curve of aircraft internal complicated structure boundary on the outer surface of a cover is obtained through a projection algorithm according to the thickness of the cover; the cover is finished and mounted; and the boundary is reversely leaded. The method reversely leads the aircraft internal complicated structure boundary by dint of three-dimensional digital measurement technology, can reach the boundary reverse leading precision of 0.5 mm, provides the basis for determination of hole positions of standard parts, and effectively improves the hole connecting precision and efficiency.

Description

technical field [0001] The invention belongs to the field of aviation manufacturing engineering / aircraft assembly, and relates to a method for guiding back the complex internal structure boundary of an aircraft using digital measurement, which is used for guiding the complex internal structure boundary of the aircraft to the skin surface to ensure the connection accuracy of hole making. Background technique [0002] With the continuous improvement of aircraft performance, the structure and connection of parts are becoming more and more complex. The skin surface and structure are connected by standard parts (mainly riveted and bolted), and the distance between the center of the standard part and the boundary of the part has an impact on the strength of the aircraft connection Larger, and most of the connecting holes of standard parts need to be prepared on site, so how to ensure the accuracy of the hole position is very important to the overall life of the aircraft. [0003] ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art, in order to change the problem of poor processability of making holes in the complex internal structure of the aircraft, the present invention provides a method of backtracking the complex internal structure of the aircraft using digital measurement with the help of three-dimensional digital measurement technology. On-line measurement of the boundary, combined with product digital simulation to extract the normal vector direction at the boundary, through compensation calculation, the complex structure boundary inside the aircraft is reversed to the skin surface, which provides a basis for determining the hole position of the standard part, and effectively improves the hole connection accuracy , to ensure the quality and efficiency of aircraft assembly

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