High-efficiency repairing and manufacturing process for aluminum alloy curved cabin and cover

Abstract

The application discloses a high-efficiency repairing and manufacturing process method for an aluminum alloy curved cabin body and cover body, belongs to the technical field of repairing and manufacturing methods for flight weapons, and aims to solve the problem of low repairing and manufacturing installation efficiency of the curved cabin body and cover body. A plurality of variable-diameter screw rods are processed first, one end of the variable-diameter screw rod is a large-diameter threaded section matched with a threaded hole, the other end of the variable-diameter screw rod is a small-diameter threaded section matched with a counterbore, the curved cabin body and the cover body are pre-assembled through the variable-diameter screw rod, manual adaptive polishing and repairing are performed on the curved cabin body and the cover body, surface passivation treatment is performed on the curved cabin body and the cover body, then a steel wire sleeve is inlaid in the threaded hole of the fixed cover body, and finally, the curved cabin body and the cover body are fixed by using a fastening screw. The curved cabin body and the cover body are pre-assembled through the variable-diameter screw rod, polishing and repairing are performed in advance, the original twice surface passivation treatment is reduced to once, and the repairing and manufacturing installation efficiency of the curved cabin body and the cover body is greatly improved.

Description

Technical Field

[0001] This invention belongs to the technical field of repair and maintenance methods for flight-type weapons, and particularly relates to an efficient repair and maintenance process for aluminum alloy curved surface cabins and canopies. Background Technology

[0002] Flight weapons typically have a streamlined aluminum alloy outer shell curved cabin, which houses various electrical components. To facilitate the assembly of these components, the curved cabin usually has mounting openings. These openings are closed by covers that conform to the shape of the curved cabin, and the covers are fixed to the curved cabin with fastening screws.

[0003] Flight-related products have certain airtightness requirements. Therefore, after the canopy is fixed to the curved cabin, the gap between the two is generally required to be less than 0.1mm. This necessitates trial assembly of the curved cabin and canopy during processing, and manual adjustments to the arcs, rounded corners, and other transitional areas of the two components. However, the fastening screws securing the canopy do not directly mate with the threaded holes on the curved cabin. To protect the threads of the threaded holes on the curved cabin, the threaded holes are usually made larger, and a wire thread insert is embedded in the threaded hole, with the fastening screw engaging with the wire thread insert. To prevent oxidation of the aluminum alloy components, the curved cabin must undergo surface passivation treatment together with the canopy before the wire thread insert is inserted. After the curved cabin and canopy are fitted together, the passivation layer of the fitted area is damaged, requiring another passivation treatment. Each surface passivation requires a preparation period of 2-3 days, and the progress of unpassivated products must be suspended, resulting in low efficiency in the fitting and installation of aluminum alloy curved cabins and canopies. Summary of the Invention

[0004] The purpose of this invention is to provide an efficient repair and assembly process for aluminum alloy curved surface cabins and covers, solving the problem of low repair and installation efficiency caused by the need for a second surface passivation treatment after the curved surface cabins and covers have been repaired. The technical solution adopted by this invention is as follows:

[0005] A highly efficient repair and assembly process for an aluminum alloy curved surface cabin and cover includes a curved surface cabin and a cover. The curved surface cabin has an installation opening and a plurality of threaded holes distributed around the installation opening. The cover has countersunk holes corresponding one-to-one with the plurality of threaded holes. The process includes the following steps:

[0006] Step 1: Machining several reducing screw rods. One end of the reducing screw rod is a large-diameter threaded section that matches the threaded hole, and the other end of the reducing screw rod is a small-diameter threaded section that matches the countersunk hole.

[0007] Step 2: Screw the large diameter threaded sections of several reducing screws into the corresponding threaded holes, fit the cover body with the curved cabin body, and make the small diameter threaded sections of several reducing screws pass through the corresponding through holes.

[0008] Step 3: Observe the gap between the cover and the curved cabin, and perform adaptive grinding and fitting on the parts where the cover and the curved cabin contact each other until the gap between the cover and the curved cabin is less than 0.1mm at all points.

[0009] Step 4: After the repair and fitting are completed, the curved cabin and cover are simultaneously subjected to surface passivation treatment.

[0010] Step 5: After passivation, insert several wire thread inserts into several threaded holes one by one, and pass several fastening screws through several countersunk holes one by one, and connect them to several wire thread inserts one by one.

[0011] Furthermore, a slotted or Phillips head groove is provided on one end face of the small-diameter threaded section for screwing with a screwdriver.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] This invention uses a variable-diameter screw rod to pre-assemble the curved cabin and cover, and performs grinding and fitting in advance, reducing the original two surface passivation treatments to one, which greatly improves the fitting and installation efficiency of the curved cabin and cover, and can meet the gap requirements. Attached Figure Description

[0014] Figure 1 This is an assembly diagram of the curved cabin and the canopy;

[0015] Figure 2 yes Figure 1 AA section view;

[0016] Figure 3 yes Figure 2 Enlarged view of point B;

[0017] Figure 4 yes Figure 2 Enlarged view of point C.

[0018] In the figure, 1. curved cabin, 11. mounting port, 12. threaded hole, 2. cover, 21. countersunk hole, 3. fastening screw, 4. wire thread insert, 5. reducing screw rod, 51. large diameter threaded section, 52. small diameter threaded section. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0020] The connections mentioned in this invention are divided into fixed connections and detachable connections. Fixed connections, also known as non-detachable connections, include but are not limited to conventional fixed connection methods such as folded connections, riveted connections, adhesive connections, and welded connections. Detachable connections include but are not limited to conventional disassembly methods such as bolted connections, snap-fit ​​connections, pin connections, and hinged connections. When a specific connection method is not explicitly defined, it is assumed that at least one existing connection method can be found to achieve this function, and those skilled in the art can choose according to their needs. For example, a welded connection can be chosen for fixed connections, and a bolted connection can be chosen for detachable connections.

[0021] The present invention will be further described in detail below with reference to the accompanying drawings. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0022] Example: Figures 1-4 As shown, an efficient repair process for an aluminum alloy curved cabin and cover includes a curved cabin 1 and a cover 2. The curved cabin 1 has an installation port 11 and a plurality of threaded holes 12 distributed around the installation port 11. The cover 2 has countersunk holes 21 corresponding one-to-one with the plurality of threaded holes 12. The process includes the following steps:

[0023] Step 1: Machining several reducing screw rods 5. One end of the reducing screw rod 5 is a large diameter threaded section 51 that matches the threaded hole 12, and the other end of the reducing screw rod 5 is a small diameter threaded section 52 that matches the countersunk hole 21.

[0024] Step 2: Screw the large diameter threaded sections 51 of several reducing screw rods 5 into several threaded holes 12 one by one, fit the cover 2 with the curved chamber 1, and make the small diameter threaded sections 52 of several reducing screw rods 5 pass through several through holes one by one. Nuts can be screwed on the small diameter threaded sections 52 to fix the cover 2, or the cover 2 can be pressed by hand to temporarily fix the cover 2.

[0025] Step 3: Observe the gap between the cover 2 and the curved cabin 1, and perform adaptive grinding and fitting on the parts where the cover 2 and the curved cabin 1 contact each other until the gap between the cover 2 and the curved cabin 1 is less than 0.1mm at all points.

[0026] Step 4: After the repair is completed, the curved cabin 1 and the cover 2 are simultaneously subjected to surface passivation treatment.

[0027] Step 5: After passivation, insert several wire threaded inserts 4 into several threaded holes 12 one by one, and pass several fastening screws 3 through several countersunk holes 21 one by one, and connect them to several wire threaded inserts 4 one by one, so as to fix the cover 2 on the curved cabin 1.

[0028] This invention uses a variable diameter screw rod 5 to pre-assemble the curved cabin 1 and the cover 2, and performs grinding and repair in advance, reducing the original two surface passivation treatments to one, which greatly improves the repair and installation efficiency of the curved cabin 1 and the cover 2, and can meet the gap requirements.

[0029] A slotted or Phillips head groove is provided on one end face of the small-diameter threaded section 52 for screwing with a screwdriver. This facilitates the installation and removal of the reducing screw rod 5.

[0030] The above embodiments are merely illustrative examples of the present invention and do not limit its scope of protection. Those skilled in the art can make partial changes to them, as long as they do not exceed the spirit and essence of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A highly efficient repair process for an aluminum alloy curved cabin and cover, comprising a curved cabin (1) and a cover (2), wherein the curved cabin (1) is provided with an installation port (11) and a plurality of threaded holes (12) distributed around the installation port (11), and the cover (2) is provided with countersunk holes (21) corresponding one-to-one with the plurality of threaded holes (12), characterized in that, Includes the following steps: Step 1: Machining several variable diameter screw rods (5). One end of the variable diameter screw rod (5) is a large diameter thread section (51) that matches the threaded hole (12), and the other end of the variable diameter screw rod (5) is a small diameter thread section (52) that matches the countersunk hole (21). Step 2: Screw the large diameter threaded sections (51) of several variable diameter screw rods (5) into several threaded holes (12) one by one, fit the cover (2) with the curved cabin (1), and make the small diameter threaded sections (52) of several variable diameter screw rods (5) pass through several through holes one by one. Tighten nuts on the small diameter threaded sections (52) to fix the cover (2), or press the cover (2) by hand to temporarily fix the cover (2); Step 3: Observe the gap between the cover (2) and the curved cabin (1), and perform adaptive grinding and fitting on the parts where the cover (2) and the curved cabin (1) come into contact until the gap between the cover (2) and the curved cabin (1) is less than 0.1mm. Step 4: After the repair is completed, the curved cabin (1) and the cover (2) are simultaneously subjected to surface passivation treatment. Step 5: After passivation, insert several wire thread inserts (4) into several threaded holes (12) one by one, and pass several fastening screws (3) through several countersunk holes (21) one by one, and connect them to several wire thread inserts (4) one by one.

2. The efficient repair and assembly process for an aluminum alloy curved surface cabin and cover according to claim 1, characterized in that: A slotted or cross-shaped groove is provided on one side of the small diameter thread section (52) for screwdrivers to screw in.

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