Double-layer fan-shaped bushing pressurized adhesive fixture

Abstract

The present invention relates to a double-layer fan-shaped bushing pressurized adhesive clamp, which includes an inner pressure block, an outer pressure block and a compression screw; the inner pressure block and the outer pressure block are both fan-shaped blocks, and both include fan-shaped end faces on both sides, a lower fan-shaped arc surface and an upper force-bearing surface; a blind hole is formed on one end face of the inner pressure block, and threaded through holes are formed on both end faces of the outer pressure block; the front end of the compression screw matches the shape of the blind hole, the middle part of the compression screw is a threaded rod and matches the threaded through hole, and the rear end of the compression screw is an operating end; rotating the threaded rod can make the outer pressure block and the inner pressure block move toward or away from each other. The present invention has a simple structure and is easy to operate.

Description

Technical Field

[0001] The invention relates to a method for installing special-shaped parts, in particular to a double-layer sector-shaped bushing pressurized gluing fixture. Background Art

[0002] When installing the inner and outer fan-shaped bushings relative to each other, the fan-shaped end faces and the axial cylindrical surface must be in contact with the corresponding bonding surfaces of the fuselage frame beam, and no relative movement occurs during the bonding and curing process. The distance tolerance between the fan-shaped end faces of the two bushings is 0.1mm. Due to the small space where the bushings are installed (the fan-shaped groove is 8mm wide and has a maximum diameter of 74mm), if vacuum bag pressing is used, there is a risk of dislocation during the bushing curing process. Moreover, after vacuuming, the distance between the bushing end faces is difficult to measure due to the presence of soft materials such as the vacuum bag and breathable felt. Therefore, it is difficult to ensure the distance between the fan-shaped end faces of the two bushings. Summary of the Invention

[0003] The purpose of the present invention is to manufacture an adhesive fixture for pressing the inner and outer bushings to make them fit against the fuselage frame beam. Before they are heated and cured, the gap between the two bushing fan-shaped surfaces can be measured, and it is ensured that the bushings do not move during the heating and curing process.

[0004] The technical solution of the present invention is to provide a double-layer sector-shaped bushing pressurized gluing fixture, wherein the double-layer sector-shaped bushing is used to be assembled in a double-layer sector-shaped groove, wherein there is a gap between the double-layer sector-shaped grooves, and the double-layer sector-shaped bushings both have flanges, and the flanges of the inner sector-shaped bushing and the outer sector-shaped bushing are both in the gap;

[0005] The pressurized adhesive fixture includes an inner pressure block 1, an outer pressure block 2 and a pressing screw 3; the inner pressure block and the outer pressure block are both fan-shaped blocks, and both include fan-shaped end faces on both sides, a lower fan-shaped arc surface and an upper force-bearing surface; a blind hole is opened on one end face of the inner pressure block, and threaded through holes are opened on both end faces of the outer pressure block; the front end of the pressing screw matches the shape of the blind hole, the middle part of the pressing screw is a threaded rod and matches the threaded through hole, and the rear end of the pressing screw is the operating end; rotating the threaded rod can make the outer pressure block and the inner pressure block move toward or away from each other;

[0006] The opposite end surfaces of the inner and outer pressure blocks are both formed with fan-shaped extended edges, and the fan-shaped extended edges of the inner pressure block are used to apply axial pressure to the flange of the inner fan-shaped bushing, and the fan-shaped extended edges of the outer pressure block are used to apply axial pressure to the flange of the outer fan-shaped bushing; when the threaded rod rotates so that the outer pressure block and the inner pressure block move in opposite directions, axial pressures in opposite directions are applied through the fan-shaped extended edges of the inner and outer pressure blocks;

[0007] The external force can act on the upper force-bearing surfaces of the inner and outer pressing blocks, and be transmitted as radial pressure through the lower fan-shaped arc surfaces of the inner and outer pressing blocks.

[0008] The present invention can simultaneously establish axial and radial pressure on the double-layer sector-shaped bushing, thereby facilitating the installation of the bushing and enabling the flange to be evenly stressed when the bushing is compressed.

[0009] Furthermore, the front end of the threaded rod is an optical axis, which is in sliding fit with the blind hole.

[0010] Furthermore, the rear end of the threaded rod is a hexagonal nut, which facilitates the application of torque.

[0011] Furthermore, the upper force-bearing surfaces of the inner pressing block and the outer pressing block are located in the same plane.

[0012] Furthermore, the double-layer fan-shaped groove is arranged on the side surface of the fuselage frame beam.

[0013] Furthermore, the compression screw is provided with a locking device for locking the compression screw and the outer compression block to prevent the compression block from loosening and unloading the compression force.

[0014] The bushing installation method based on the above-mentioned fixture includes the following steps:

[0015] 1. Apply glue to the bonding surfaces of the inner and outer sector bushings and install them in the inner and outer sector grooves;

[0016] 2. Rotate the compression screw through the outer compression block and insert its front end into the blind hole of the inner compression block (1). Rotate the compression screw so that the relative end faces of the inner and outer compression blocks fit together, ensuring that the fan-shaped extended edges of the inner and outer compression blocks can be inserted into the gap; and make the lower fan-shaped arc surface of the inner and outer compression blocks press on the inner and outer fan-shaped bushings;

[0017] 3. Rotate the compression screw to make the outer compression block and the inner compression block move in opposite directions, and apply axial pressure to the inner and outer fan-shaped bushings respectively through the fan-shaped extension edges of the inner and outer compression blocks; when the compression screw is rotated to the pre-compression position, the fan-shaped extension edges pre-compress the flanges of the inner and outer fan-shaped bushings;

[0018] 4. Apply pressure to the upper force-bearing surfaces of the inner and outer pressure blocks, so that the inner and outer pressure blocks transmit radial pressure through the lower sector-shaped arc surface and compress the inner and outer sector-shaped bushings;

[0019] 5. Increase the axial pressure of the compression screw and maintain the axial pressure until solidification to complete the installation of the sector bushing.

[0020] In addition, the pre-compression force in step 3 is less than the holding pressure during solidification, and the pre-compression force can ensure that the inner and outer fan-shaped bushings have adjustment margins in step 4.

[0021] The beneficial effects of the present invention are as follows: 1. The present invention has a simple structure and is easy to operate; 2. When the inner and outer pressure blocks are installed upside down, the pressure blocks cannot cooperate with the frame beam, and have an error-proofing function; 3. The sum of the thicknesses of the corresponding fan-shaped surfaces of the inner and outer pressure blocks is less than the distance between the fan-shaped surfaces of the two bushings, which facilitates the assembly of the fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The illustrative examples, together with the preferred mode of use, further objects and description thereof, will be best understood by reference to the following detailed description of examples of the invention when read in conjunction with the accompanying drawings, in which:

[0023] Figure 1 The schematic diagram of the bushing is shown below;

[0024] Figure 2 is a cross-sectional view of the present invention;

[0025] Figure 3 Schematic diagram of applying downward pressure on the upper load-bearing surface;

[0026] Among them, there are an inner pressure block 1, an outer pressure block 2, a tightening screw 3, and an external force applying device 4. DETAILED DESCRIPTION

[0027] The disclosed examples will be described more fully with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples can be described and these examples should not be construed as limited to the examples set forth herein. Instead, these examples are described so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those skilled in the art.

[0028] For example, see Figure 1 , providing a double-layer fan-shaped bushing pressurized gluing fixture, the double-layer fan-shaped bushing is used to be assembled in the double-layer fan-shaped groove, there is a gap between the double-layer fan-shaped grooves, and the double-layer fan-shaped bushings both have flanges, and the flanges of the inner fan-shaped bushing and the outer fan-shaped bushing are both in the gap;

[0029] The pressurized adhesive fixture includes an inner pressure block 1, an outer pressure block 2 and a pressing screw 3; the inner pressure block and the outer pressure block are both fan-shaped blocks, and both include fan-shaped end faces on both sides, a lower fan-shaped arc surface and an upper force-bearing surface; a blind hole is opened on one end face of the inner pressure block, and threaded through holes are opened on both end faces of the outer pressure block; the front end of the pressing screw matches the shape of the blind hole, the middle part of the pressing screw is a threaded rod and matches the threaded through hole, and the rear end of the pressing screw is the operating end; rotating the threaded rod can make the outer pressure block and the inner pressure block move toward or away from each other;

[0030] The opposite end surfaces of the inner and outer pressure blocks are both formed with fan-shaped extended edges, and the fan-shaped extended edges of the inner pressure block are used to apply axial pressure to the flange of the inner fan-shaped bushing, and the fan-shaped extended edges of the outer pressure block are used to apply axial pressure to the flange of the outer fan-shaped bushing; when the threaded rod rotates so that the outer pressure block and the inner pressure block move in opposite directions, axial pressures in opposite directions are applied through the fan-shaped extended edges of the inner and outer pressure blocks;

[0031] The external force can act on the upper force-bearing surfaces of the inner and outer pressing blocks, and be transmitted as radial pressure through the lower fan-shaped arc surfaces of the inner and outer pressing blocks.

[0032] The present invention can simultaneously establish axial and radial pressure on the double-layer sector-shaped bushing, thereby facilitating the installation of the bushing and enabling the flange to be evenly stressed when the bushing is compressed.

[0033] The front end of the threaded rod is an optical axis, which is in sliding fit with the blind hole.

[0034] The rear end of the threaded rod is a hexagonal nut, which is convenient for applying torque.

[0035] The upper force-bearing surfaces of the inner pressing block and the outer pressing block are located in the same plane.

[0036] The double-layer fan-shaped groove is arranged on the beam side of the fuselage frame beam.

[0037] The compression screw is provided with a locking device for locking the compression screw and the outer compression block to prevent the compression block from loosening and unloading the compression force.

[0038] The description of various advantageous arrangements has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the examples disclosed. Many modifications and variations will be apparent to those skilled in the art. In addition, different advantageous examples may describe different advantages compared to other advantageous examples. The selected example or examples are chosen and described to best illustrate the principles of the examples, their practical application, and to enable those skilled in the art to understand the disclosure with various examples with various modifications suitable for the particular use contemplated.

Claims

1. Double-layer fan-shaped bushing pressurized adhesive fixture, characterized by: The double-layer sector-shaped bushing is used to be assembled in the double-layer sector-shaped groove. There is a gap between the double-layer sector-shaped grooves, and the double-layer sector-shaped bushings both have flanges, and the flanges of the inner sector-shaped bushing and the outer sector-shaped bushing are both in the gap; The pressurized adhesive clamp comprises an inner pressure block (1), an outer pressure block (2) and a pressing screw (3); the inner pressure block and the outer pressure block are both fan-shaped blocks, and both comprise fan-shaped end faces on both sides, a lower fan-shaped arc face and an upper force-bearing face; a blind hole is provided on one end face of the inner pressure block, and threaded through holes are provided on both end faces of the outer pressure block; the front end of the pressing screw matches the shape of the blind hole, the middle part of the pressing screw is a threaded rod and matches the threaded through hole, and the rear end of the pressing screw is an operating end; rotating the threaded rod can cause the outer pressure block and the inner pressure block to move toward or away from each other; The opposite end surfaces of the inner and outer pressure blocks are both formed with fan-shaped extended edges, and the fan-shaped extended edges of the inner pressure block are used to apply axial pressure to the flange of the inner fan-shaped bushing, and the fan-shaped extended edges of the outer pressure block are used to apply axial pressure to the flange of the outer fan-shaped bushing; when the threaded rod rotates so that the outer pressure block and the inner pressure block move in opposite directions, axial pressures in opposite directions are applied through the fan-shaped extended edges of the inner and outer pressure blocks; The external force can act on the upper force-bearing surfaces of the inner and outer pressing blocks, and be transmitted as radial pressure through the lower fan-shaped arc surfaces of the inner and outer pressing blocks.

2. The double-layer sector bushing pressurized adhesive fixture according to claim 1, characterized in that: A double-layer sector-shaped bushing pressurized gluing fixture, wherein the front end of the threaded rod is an optical axis and is in sliding fit with the blind hole.

3. The double-layer sector bushing pressurized adhesive fixture according to claim 1, characterized in that: The rear end of the threaded rod is a hexagonal nut, which is convenient for applying torque.

4. The double-layer sector bushing pressurized adhesive fixture according to claim 1, characterized in that: The upper force-bearing surfaces of the inner pressing block and the outer pressing block are located in the same plane.

5. The double-layer sector bushing pressurized adhesive fixture according to claim 1, characterized in that: The double-layer fan-shaped groove is arranged on the beam side of the fuselage frame beam.

6. The double-layer sector bushing pressurized adhesive fixture according to claim 1, characterized in that: The compression screw is provided with a locking device for locking the compression screw and the outer compression block.

7. A method for installing a bushing using the clamp according to any one of claims 1 to 6, characterized in that The steps include: Step 1. Apply glue to the bonding surfaces of the inner and outer fan-shaped bushings and install them in the inner and outer fan-shaped grooves; Step 2. Rotate the compression screw through the outer compression block and insert its front end into the blind hole of the inner compression block (1). Rotate the compression screw so that the relative end faces of the inner and outer compression blocks fit together, ensuring that the fan-shaped extended edges of the inner and outer compression blocks can be inserted into the gap; and make the lower fan-shaped arc surface of the inner and outer compression blocks press on the inner and outer fan-shaped bushings; Step 3. Rotate the compression screw so that the outer compression block and the inner compression block move in opposite directions, and apply axial pressure to the inner and outer fan-shaped bushings respectively through the fan-shaped extension edges of the inner and outer compression blocks; when the compression screw is rotated to the pre-compression position, the fan-shaped extension edges pre-compress the flanges of the inner and outer bushings; Step 4. Apply pressure to the upper force-bearing surfaces of the inner and outer pressing blocks, so that the inner and outer pressing blocks transmit radial pressure through the lower sector-shaped arc surface and compress the inner and outer sector-shaped bushings; Step 5. Rotate the compression screw to increase the axial pressure, maintain the axial pressure to compress the inner and outer fan-shaped bushings, and complete the installation of the fan-shaped bushing after solidification.

8. The bushing installation method according to claim 7, characterized in that: In step 3 , the pressing force at the pre-pressing position is less than the holding pressure during solidification. The pressing force at the pre-pressing position can ensure that the inner and outer fan-shaped bushings have an adjustment margin in step 4 .

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