Blind bolt dismounting tool for aircraft structural parts

Abstract

The utility model discloses an aviation structural member blind bolt dismantling frock, the vertical rectangular through -hole is set up in the inside of rectangular positioning frame, the horizontal threaded through -hole is set up on positioning frame circumferential four side wall surface respectively, rectangular movable block is located in rectangular through -hole, the vertical positioning through -hole is set up in movable block inside, the strip -shaped mortise is set up on movable block circumferential four side wall surface respectively, and the length direction of strip -shaped mortise is with movable block length direction same direction, and the wave pearl positioning bolt is set up in threaded through -hole to its front end and stretches into strip -shaped mortise bottom surface and is combined, is installed a plurality of sucking disc on positioning frame one side surface, and drill bushing inserts positioning through -hole, and the lower end face on drill bushing is equipped with the positioning dog corresponding with the blind bolt of to be removed, and sucking disc and positioning dog are in the upside or downside of positioning frame. The dispersedly distributed sucking disc guarantees and different parts effective adsorption, and positioning frame, movable block, wave pearl positioning bolt form adjusting mechanism, after having been adsorbed to complete through sucking disc in positioning frame, still can adjust movable block and drill bushing in a certain range.

Description

Technical Field

[0001] This application relates to tooling for the repair of aerospace structural components, and in particular to a tooling for removing blind bolts. Background Technology

[0002] When assembling closed cavity structures in aerospace applications, blind bolts are used because fasteners can only be installed from the outside of the cavity. Taking the MBF2113 series blind bolts as an example, after installation, a threaded section remains at the countersunk head, protruding beyond it. The length of this protruding threaded section is typically used to determine if the blind bolt has been installed correctly. If the length of the threaded section is incorrect, the blind bolt must be removed.

[0003] Existing blind bolt removal tools on the market mainly consist of a vacuum adsorption component and a drill sleeve. During use, the tool is first checked against the drill sleeve to ensure it has been adsorbed to the exact center of the blind bolt. Then, the core of the blind bolt is disassembled using a drill bit. Finally, a punch is used to remove the disassembled blind bolt from the hole, completing the disassembly. If the tool fails to adsorb to the exact center of the blind bolt, it must be removed and repositioned. It is evident that finding the exact center is time-consuming, and existing integrated vacuum adsorption components are ineffective at removing blind bolts located on the edge of parts. Utility Model Content

[0004] Purpose of this utility model: The purpose of this application is to provide a blind bolt removal tool for aerospace structural components. It can be adjusted to be positioned at the exact center of the blind bolt to be removed without repeated removal of the tool. The tool is also applicable to the removal of blind bolts on the edge of parts.

[0005] Technical Solution: A tooling for removing blind bolts from aerospace structural components, comprising a rectangular positioning frame, a rectangular movable block, a ball bearing positioning bolt, suction cups, and a drill sleeve. The positioning frame has a vertical rectangular through hole inside, and horizontal threaded through holes on its four circumferential side walls. The movable block is located within the rectangular through hole, and has a vertical positioning through hole inside. A strip-shaped groove is formed on each of the four circumferential side walls of the movable block, with the length of the groove aligned with the side length of the movable block. The ball bearing positioning bolt passes through the threaded through hole until its front end extends into the bottom surface of the strip-shaped groove and abuts against it. Several suction cups are mounted on one side surface of the positioning frame. The drill sleeve is inserted into the positioning through hole. A positioning claw corresponding to the blind bolt to be removed is provided on the lower end face of the drill sleeve. The suction cups and the positioning claw are located on the upper or lower side of the positioning frame.

[0006] Furthermore, the strip-shaped sink is located below the center line of the thickness direction of the movable block. When the tooling is removed and installed on the protruding surface of the part, the internal movable block can be raised to avoid interference with the part surface and thus prevent adsorption failure.

[0007] Furthermore, the longitudinal section of the strip-shaped sink is semi-circular, and the front end of the ball positioning bolt extends into the bottom surface of the strip-shaped sink and abuts against it, so that the strip-shaped sink and the ball at the front end of the ball positioning bolt fit together.

[0008] Furthermore, the threaded through hole is located at the center of the positioning frame wall.

[0009] Furthermore, at least three suction cups are symmetrically installed at the four corners of the positioning frame surface.

[0010] Furthermore, the upper end of the drill sleeve has a transverse frustum, the diameter of which is larger than the diameter of the positioning through hole. After the drill sleeve is inserted into the positioning through hole, it does not fall completely into the positioning through hole, and the drill sleeve can be gripped by the transverse frustum.

[0011] Furthermore, the rectangular shape of the rectangular through hole is larger than the rectangular shape of the movable block, allowing the positioning frame to adjust the position of the internal movable block within a certain range even after the suction cup has been successfully attached.

[0012] Beneficial effects: The advantages of this application are:

[0013] 1. Replace the original integrated vacuum adsorption component with several dispersed suction cups. This way, even when the blind bolt is located at the edge of the part or the edge of the part is uneven, some suction cups can still adsorb the part.

[0014] 2. The positioning frame, movable block, and ball positioning bolt form an adjustment mechanism, allowing the positioning frame to adjust the position of the internal movable block within a certain range even after the suction cup has been used to attach the parts. This adjusts the position of the drill bushing and centers it on the blind bolt to be removed, avoiding repeated disassembly and reassembly of the positioning frame that attaches to the parts.

[0015] 3. The positioning through hole of the movable block is used to install drill bushings. Drill bushings with the same outer diameter but different inner diameters can be selected to remove blind bolts of different sizes. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the dismantling tooling used in this application;

[0017] Figure 2 for Figure 1 A bottom view;

[0018] Figure 3 This is the main view of the positioning frame;

[0019] Figure 4 for Figure 3 AA section view;

[0020] Figure 5This is the main view of the active block;

[0021] Figure 6 for Figure 5 A bottom view;

[0022] Figure 7 This is the main view of the drill bushing;

[0023] Figure 8 for Figure 7 A bottom view. Detailed Implementation

[0024] The present application will be further explained below with reference to the accompanying drawings and specific embodiments.

[0025] A tooling for removing blind bolts from aerospace structural components, as shown in the attached document. Figure 1 , 2 As shown, it includes a positioning frame 1, a movable block 2, a ball positioning bolt 3, a suction cup 4, and a drill sleeve 5.

[0026] Combined with appendix Figure 3 , 4 As shown, the positioning frame 1 is rectangular, with a vertical rectangular through hole 11 (along the thickness direction of the positioning frame) inside. Horizontal threaded through holes 12 are respectively opened on the four circumferential side walls, preferably at the center of the wall of the positioning frame 1. The threaded through holes 12 communicate with the rectangular through holes 11. Thus, one side surface of the positioning frame 1 is divided into four corner areas by the threaded through holes 12 on the four side walls. Each area is provided with mounting holes 13 to install suction cups 4. At least three suction cups 4 are installed in each area, and the suction cups 4 in the four areas are installed symmetrically.

[0027] Combined with appendix Figure 5 , 6 As shown, the movable block 2 is rectangular and located within the rectangular through hole 11. The rectangular shape of the through hole 11 is slightly larger than that of the movable block 2, allowing the movable block 2 to have four-way translational space within the through hole 11. A vertical positioning through hole 21 (along the thickness direction of the movable block) is formed inside the movable block 2. Strip-shaped grooves 22 are formed on the four circumferential side walls of the movable block 2. The length direction of the strip-shaped grooves 22 is in the same direction as the side length direction of the movable block 2. The strip-shaped grooves 22 are formed below the center line of the thickness direction of the movable block 2, that is, offset downward from the center line of the thickness direction.

[0028] When assembling the positioning frame 1 and the movable block 2, the ball positioning bolt 3 passes through the threaded through hole 12 until the front end of the ball positioning bolt 3 extends into the bottom surface of the strip groove 22 on the movable block 2 and abuts against it. The longitudinal section of the strip groove 22 is semi-circular and fits with the ball at the front end of the ball positioning bolt 3. After the ball positioning bolts 3 in all four directions are connected, the movable block 2 and the positioning frame 1 are connected together.

[0029] Combined with appendix Figure 7 ,8 As shown, the drill sleeve 5 is T-shaped. The lower end face of the drill sleeve 5 is provided with a positioning claw 51 corresponding to the blind bolt to be removed. The upper end of the drill sleeve 5 has a transverse frustum 52. The diameter of the transverse frustum 52 is larger than the diameter of the positioning through hole 21. The positioning through hole 21 is used to insert the drill sleeve 5. When in use, the drill sleeve 5 is inserted and can be gripped by the transverse frustum 52.

[0030] When using the dismantling fixture of this application, the positioning frame 1 with the suction cup 4 facing downwards is positioned, and the positioning frame 1 and movable block 2 are placed at the blind bolt to be removed on the structural component, so that the positioning through hole 21 on the movable block 2 is basically aligned with the blind bolt to be removed. The positioning frame 1 is fixed to the structural component by the multiple suction cups 4 on the positioning frame 1. At this time, the downward offset strip groove 22 on the movable block 2 raises the entire movable block 2, avoiding interference with the installation on the protruding surface of the part, which would cause the suction cup 4 to fail to adhere. Then, the position of the movable block 2 is precisely adjusted by adjusting the ball positioning bolts 3. Specifically, two opposite ball positioning bolts 3 are used as a group, and the movable block 2 is moved and pushed to adjust the X and Y positions of the movable block 2. After each adjustment, the drill bushing is removed. 5. Insert the drill sleeve 5 into the positioning through hole 21. Check whether the positioning claw 51 on the lower end face of the drill sleeve 5 matches the cross groove at the top of the blind bolt to be removed. This will determine whether the X or Y position has been adjusted accurately. If the positioning claw 51 does not match the cross groove, raise the drill sleeve 5 without removing it completely. Adjust the movable block 2 again. After each direction is adjusted correctly, tighten and lock the two ball positioning bolts 3 in that direction to the positioning frame 1 and the movable block 2. After the X and Y positions are accurately adjusted and locked, use the drill sleeve 5 to position and guide the drill sleeve 5 inserted into the positioning through hole 21. Drill the corresponding size drill bit into the core rod of the blind bolt and disassemble the core rod. Then the entire tooling can be removed. The remaining part of the blind bolt can be pushed down and removed by tapping.

[0031] The advantages of the demolition tooling in this application are:

[0032] 1. Replace the original integrated vacuum adsorption component with several dispersed suction cups. This way, even when the blind bolt is located at the edge of the part or the edge of the part is uneven, some suction cups can still adsorb the part.

[0033] 2. The positioning frame, movable block, and ball positioning bolt form an adjustment mechanism, allowing the positioning frame to adjust the position of the internal movable block within a certain range even after the suction cup has been used to attach the parts. This adjusts the position of the drill bushing and centers it on the blind bolt to be removed, avoiding repeated disassembly and reassembly of the positioning frame that attaches to the parts.

[0034] 3. The positioning through hole of the movable block is used to install drill bushings. Drill bushings with the same outer diameter but different inner diameters can be selected to remove blind bolts of different sizes.

[0035] 4. The positioning claw on the lower end face of the drill bushing matches the cross groove at the top of the blind bolt, indicating that the movable block has been adjusted to the exact center of the blind bolt to be removed.

[0036] 5. The strip groove on the internal movable block is offset downward along the center line of the movable block thickness direction. When the tooling is removed and installed on the raised surface of the part, the internal movable block can be raised to avoid interference with the part surface and thus prevent adsorption failure.

Claims

1. An aerospace structural part blind bolt removal tool, characterized by: The system includes a rectangular positioning frame (1), a rectangular movable block (2), a ball bearing positioning bolt (3), a suction cup (4), and a drill bushing (5). The positioning frame (1) has a vertical rectangular through hole (11) inside. The positioning frame (1) has horizontal threaded through holes (12) on its four circumferential side walls. The movable block (2) is located inside the rectangular through hole (11). The movable block (2) has a vertical positioning through hole (21) inside. The movable block (2) has strip-shaped countersunk grooves (22) on its four circumferential side walls. 2) The length direction is the same as the side length direction of the movable block (2). The ball positioning bolt (3) passes through the threaded through hole (12) until its front end extends into the bottom surface of the strip groove (22) and abuts. Several suction cups (4) are installed on one side surface of the positioning frame (1). The drill sleeve (5) is inserted into the positioning through hole (21). The lower end face of the drill sleeve (5) is provided with a positioning claw (51) corresponding to the blind bolt to be removed. The suction cup (4) and the positioning claw (51) are located on the upper or lower side of the positioning frame (1).

2. The aerospace structural part blind bolt removal tooling of Claim 1, wherein: The strip-shaped sinkhole (22) is located below the center line of the thickness direction of the movable block (2).

3. The aerospace structural part blind bolt removal tooling of Claim 1, wherein: The longitudinal section of the strip-shaped sinkhole (22) is semi-circular.

4. The aerospace structural part blind bolt removal tooling of Claim 1, wherein: The threaded through hole (12) is located at the center of the wall of the positioning frame (1).

5. The aerospace structural part blind bolt removal tooling of Claim 1, wherein: At least three suction cups (4) are symmetrically installed in the four corner areas of the positioning frame (1).

6. The aerospace structural part blind bolt removal tooling of Claim 1, wherein: The upper end of the drill sleeve (5) has a transverse frustum (52), the diameter of which is larger than the diameter of the positioning through hole (21).

7. The aerospace structural part blind bolt removal tooling of Claim 1, wherein: The rectangular shape of the rectangular through hole (11) is larger than the rectangular shape of the movable block (2).

Images