Lower half frame appearance fixing tool for damaged airplane
By designing a fixture to fix the lower half of the frame, and using an arc-shaped bracket and a detachable clamping structure, the positioning problem of the aircraft's 4-9 frame cockpit during disassembly was solved, ensuring the stability and accuracy of the aircraft repair process.
Patent Information
- Application Number
- CN202423183941.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-24
AI Technical Summary
The existing tooling cannot effectively fix the shape and position when disassembling and replacing the 4-9 frame cockpit of the aircraft. It is easy to move and misalign, resulting in deviation of the reference point.
Design a fixture for fixing the lower half of the frame, including a 4-frame bracket, a 9-frame bracket, a base frame, an opening frame beam bracket, and diagonal bracing. It adopts an arc surface design and a detachable bow-shaped clamping structure to ensure the stable fixing of the aircraft skin and prevent positional changes.
It enables the aircraft to maintain a stable horizontal position during aircraft repair, preventing skin deformation and positional displacement, and ensuring the accuracy of repair work.
Smart Images
Figure CN223494764U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of aircraft maintenance technology, and in particular relates to a fixture for fixing the lower half of an aircraft frame that has been damaged. Background Technology
[0002] During the repair of a certain type of aircraft, the aircraft must be kept in a horizontal parking position. During the disassembly and replacement of aircraft cockpit components, the installation positions of each replacement component must be clamped and fixed, and their positions must not shift due to external forces. Through analysis of the repair technical plan and tooling development task book for the damaged aircraft, the required tooling for this aircraft generally includes three types: adjustment tooling, support tooling, and clamping and fixing tooling.
[0003] The main functions of each type of tooling are as follows:
[0004] 1. Adjusting the tooling: When leveling the aircraft, the altitude is adjusted using a tooling with lifting and lowering functions, thereby bringing the aircraft to a level position.
[0005] 2. Support fixtures: Used to maintain the aircraft's position after it has been leveled, and also to support the main body of the aircraft.
[0006] 3. Clamping and fixing fixture: clamp and fix the replacement component in the determined installation position to prevent its position from changing during installation.
[0007] The existing tooling is ineffective in fixing and positioning the 4-9 frame cockpit during disassembly and replacement, making it prone to shifting and misalignment, resulting in deviations from the reference points. Therefore, a set of 4-9 frame support and fixing tooling is urgently needed for adjustment and support. Utility Model Content
[0008] To address the aforementioned problems in the background art, this utility model provides a fixture for fixing the lower half of an aircraft frame that is damaged.
[0009] The technical solution adopted in this utility model is as follows:
[0010] A lower half-frame shape fixing fixture for damaged aircraft is a component of damaged aircraft repair fixtures. The bottom of the damaged aircraft repair fixture is a ground platform. The lower half-frame shape fixing fixture is installed on the ground platform and is used to support and fix the lower equipment bay skin and stringers with inner supports. This ensures that the lower half-frame remains stably fixed in its pre-disassembly position after the cockpit floor, the left and right side panels of the lower equipment bay, and the lower half-frame of frames 4-9 are disassembled, without deformation or positional change of the lower skin contour. After installation, the lower half-frame shape fixing fixture can fit tightly to the aircraft, preventing displacement, deformation, and damage to the aircraft's existing position during long-term maintenance.
[0011] The lower half-frame fixing fixture includes a 4-frame bracket 1, a 9-frame bracket 2, a base frame 4, an inlet frame beam bracket 3, an arc-shaped clamp, and diagonal braces. The base frame 4 is a frame structure that ensures overall stability while reserving a working position. Its bottom is equipped with a flange structure for fixed connection to the ground platform at the bottom of the damaged aircraft repair fixture. The 4-frame bracket 1 and 9-frame bracket 2 are both installed on top of the base frame 4 and are arranged in parallel. Two inlet frame beam brackets 3 are provided, side-by-side, supported between the 4-frame bracket 1 and 9-frame bracket 2. The upper surfaces of the 4-frame bracket 1, 9-frame bracket 2, and the two inlet frame beam brackets 3 are all curved, designed according to the shape of the aircraft air intake skin, with a 1mm thick adhesive bonded to the curved surfaces. Rubber sheets are used to prevent damage to the aircraft air intake skin. Bow-shaped clamps are installed on the 4-frame bracket 1, 9-frame bracket 2, and two mouth frame beam brackets 3. These are detachable structures used to clamp the brackets and the skin, preventing the risk of movement or deformation of the skin's contact position due to repair work. The bow-shaped clamps are installed in the grooves at the aircraft skin openings, and the clamping points are all vulcanized with rubber to prevent damage to the skin. The diagonal brace includes a diagonal brace and lugs at both ends of the diagonal brace. The diagonal brace is installed at the base frame 4 columns under the 4-frame bracket 1 and 9-frame bracket 2 through the lugs at both ends. The diagonal brace is a detachable structure, which can stabilize the tooling structure while reserving a working position for repair work.
[0012] The beneficial effects of this utility model are as follows: As part of the support fixture in the repair tooling of damaged aircraft, this utility model can work with other components to keep the aircraft in a horizontal parking state during the repair process, so that the aircraft will not shift its position due to external forces during the repair process. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall tooling for repairing damaged aircraft.
[0014] Figure 2 Axonometric view of the fixture for fixing the lower half of the frame.
[0015] Figure 3 The diagram shows the combination of 4-frame bracket 1, 9-frame bracket 2 and mouth frame beam bracket 3, where (a) is the front view, (b) is the top view and (c) is the axonometric view.
[0016] Figure 4 This is a schematic diagram of the fixture structure for fixing the lower half of the frame, where (a) is the front view and (b) is the side view.
[0017] Figure 5 This is a schematic diagram of the fixture used to fix the lower half of the frame.
[0018] In the diagram: 1-4 frame brackets; 2-9 frame brackets; 3-mouth frame beam bracket; 4-base frame. Detailed Implementation
[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in detail below.
[0020] This embodiment provides a fixture for fixing the lower half-frame shape of a damaged aircraft, which is a component of damaged aircraft repair fixtures (such as...). Figure 1 The damaged aircraft repair tooling has a ground platform at its bottom. The lower half-frame shape fixing tooling is installed on the bottom platform and is used to support and fix the lower equipment bay skin and stringers on the inner side bracket. This ensures that the lower half-frame can still be stably fixed in its original position after the cockpit floor, the left and right side panels of the lower equipment bay and the lower half-frame of frames 4-9 are disassembled, and there will be no deformation or change in the shape of the lower skin.
[0021] The lower half-frame shape fixing fixture is installed on the ground platform at the bottom of the damaged aircraft repair fixture, and includes a 4-frame bracket 1, a 9-frame bracket 2, a base frame 4, a frame beam bracket 3, and diagonal braces, as shown. Figures 2 to 4 As shown.
[0022] The base frame 4 is a frame structure, welded from Q235A / (160×100×8)mm steel rectangular tubing. While ensuring overall stability, it also provides a working position. Its bottom is equipped with a flange structure for fixed connection to the ground platform at the bottom of the damaged aircraft repair tooling. The 4-frame bracket 1 and 9-frame bracket 2 are both installed on top of the base frame 4 and are arranged in parallel. Two frame beam brackets 3 are provided, side-by-side, supporting the 4-frame bracket 1 and 9-frame bracket 2. The upper surfaces of frame 2 and the two intake frame beam brackets 3 are all curved, designed according to the shape of the aircraft intake duct skin. A 1mm thick rubber sheet is bonded to the curved surfaces to prevent damage to the aircraft intake duct skin. The materials for frame 4 bracket 1, frame 9 bracket 2, and the two intake frame beam brackets 3 are all pine wood (the shape is CNC machined using aluminum material, and the accuracy of the shape is controlled by applying aviation-grade cloth for protection). Six bow-shaped clamps are installed on frame 4 bracket 1, frame 9 bracket 2, and the two intake frame beam brackets 3. Figure 5 As shown, it is a detachable structure used to clamp the bracket and the skin, preventing the risk of movement or deformation of the skin fitting position due to repair work. The bow-shaped clamps are installed in the slots at the aircraft skin openings, and the clamping points are all vulcanized with rubber to prevent damage to the skin. The diagonal brace includes a diagonal brace and lugs at both ends of the diagonal brace. The diagonal brace is installed at the base frame 4 columns under the 4-frame bracket 1 and 9-frame bracket 2 through the lugs at both ends. The diagonal brace is a detachable structure, which can reserve a working position for repair work while stabilizing the tooling structure.
[0023] During installation, after the upper surfaces of the 4-9 frame bracket 1, 9-frame bracket 2, and two mouth frame beam brackets 3 on the aircraft's 4-9 frame and lower half frame shape fixing fixture are attached, the brackets and skin are held together by six bow-shaped clamps. After the lower half frame shape fixing fixture is installed, it can fit tightly to the aircraft, preventing displacement, deformation, and damage to the aircraft's existing position during long-term maintenance.
Claims
1. A fixture for fixing the lower half-frame shape of an aircraft in case of damage, characterized in that, The lower half-frame shape fixing fixture is a component of the damaged aircraft repair fixture. The ground platform at the bottom of the damaged aircraft repair fixture is used to support and fix the lower equipment bay skin and stringer. The lower half frame shape fixing fixture includes a 4-frame bracket (1), a 9-frame bracket (2), a base frame (4), an inlet frame beam bracket (3), and an arc-shaped clamp. The base frame (4) is a frame structure, and its bottom is fixedly connected to the ground platform at the bottom of the damaged aircraft repair fixture. The 4-frame bracket (1) and the 9-frame bracket (2) are both installed on the top of the base frame (4) and are arranged in parallel. There are two inlet frame beam brackets (3), which are supported side by side between the 4-frame bracket (1) and the 9-frame bracket (2). The upper surfaces of the 4-frame bracket (1), the 9-frame bracket (2), and the two inlet frame beam brackets (3) are all arc surfaces, set according to the shape of the aircraft air intake skin. The 4-frame bracket (1), the 9-frame bracket (2), and the two inlet frame beam brackets (3) are equipped with arc-shaped clamps for clamping the brackets and the skin.
2. The fixture for fixing the lower half-frame shape of an aircraft as described in claim 1, characterized in that, A 1mm thick rubber sheet is bonded to the curved surface of the 4-frame bracket (1), 9-frame bracket (2) and two mouth frame beam brackets (3) to prevent damage to the aircraft air intake skin.
3. The fixture for fixing the lower half-frame shape of a damaged aircraft according to claim 1, characterized in that, The bow-shaped clamp is a detachable structure.
4. The fixture for fixing the lower half-frame shape of an aircraft as described in claim 1, characterized in that, The bow-shaped clamping points are all subjected to a rubber vulcanization process.
5. A fixture for fixing the lower half-frame shape of an aircraft as described in claim 1, characterized in that, The base frame (4) columns under the 4-frame bracket (1) and 9-frame bracket (2) are provided with diagonal bracing, which is installed on the base frame (4) columns through the lugs at both ends. It is a detachable structure that provides a working position while stabilizing the tooling structure.