Boeing aircraft airtight support plate nut installation process device and process

Abstract

The invention discloses a Boeing aircraft airtight support plate nut installation process device and a Boeing aircraft airtight support plate nut installation process. A first process component is used for forming satellite holes; as the first process component is positioned in a screw hole through a coaxial positioning pin, the reference accuracy of the forming of the satellite holes is ensured; ejection iron and a rivet gun head are matched and are used for forming heads of two rivets simultaneously. Not only is the machining efficiency is improved, and the problem that after the first fastening rivet is installed, the head of the rivet extrudes and deforms the base of an airtight support plate nut, and further a rubber sealing ring can not be tightly fitted with a skin is thoroughly avoided, and the quality of the riveting of the airtight support plate nut is ensured. As the rivet gun head is guided by an axial positioning sleeve, the rivet gun head can only move in the axial direction; restraint and support on the rivet gun head in the radial direction during construction do not damage around structures due to shake, and the machining quality is further ensured.

Description

technical field [0001] The invention relates to a process equipment and process for installing airtight supporting plate nuts of Boeing aircraft. Background technique [0002] In aircraft maintenance work, such as the installation of fuselage fairings or cargo warehouse wear plates, the connection between the pressurized area and the non-pressurized area is usually achieved by using airtight support plate nuts and bolts. Such as figure 1 As shown in the middle and upper part, this type of airtight support plate nut 10 has a stepped circular platform or stepped dome-shaped sealed top (its main body) and a rubber sealing ring 11 at the bottom (the lower end in the figure), through symmetrical distribution After the satellite holes 12 on both sides of the screw hole 3 are installed with rivets, the side of the rubber seal ring 11 in contact with the far-end skin (inner skin) 2 is compressed and plastically deformed to achieve a sealing effect. [0003] Since there is no tool ...

AI Technical Summary

Problems solved by technology

Because the positioning pin only relies on the interference fit to generate axial tension, which is relatively small, when the first fastening rivet is installed, the shape of the rivet head will cause extrusion deformation at the base of the airtight supporting plate nut, while the positioning pin The axial tension of the rubber is not enough to overcome this deformation, and finally the rubber seal 11 and the skin are not tightly fitted, which in turn causes the pressurized gas or liquid in the body to leak, which brings safety hazards to the flight of the aircraft.

[0005] 2. The installation process of the traditional airtight support plate nut 10 is time-consuming and labor-intensive, and the efficiency is low

During acceptance, workers only visually judge whether the rubber sealing ring 11 of the airtight support plate nut 10 is closely attached to the skin, and the inspection method is not rigorous and scientific enough.

It is impossible to fundamentally guarantee the effective fit of the rubber sealing ring 11 of the airtight supporting plate nut 10 and the distal skin 2, and the installation quality and airtightness of the rivets after installation cannot be guaranteed

[0006] 3. Due to the vast differences in the body structure, ordinary rivet gun heads and top irons often cannot complete the installation of two rivets at the same time due to the lack of effective supports and reference objects

This method has a large error and cannot accurately distribute the satellite holes 12 symmetrically on both sides of the screw hole 3

[0008] In addition, when drilling the satellite holes 12 for installing fastening rivets on the skin, the structural repair manual requires that the axial direction of the satellite holes 12 should be perpendicular to the plane of the skin. According to experience, large deviations are likely to occur, causing the axial direction of the satellite hole 12 to be non-perpendicular to the plane of the skin, which eventually leads to the misalignment of the satellite hole 12 on the skin and the fastening rivet mounting hole of the airtight supporting plate nut 10, and the The distance between the satellite holes 12 and the hole distance of the airtight supporting plate nut 10 fastening rivets is inconsistent. If it is light, there will be an installation gap on the installation joint surface, which will affect the airtightness and airworthiness of the aircraft. If it is serious, it will cause airtightness. The bracket nut cannot be installed

Images