Large-size aircraft skin joint device and joint method

Abstract

The invention discloses a large-size aircraft skin matching device and matching method, which belong to the field of skin technology. The matching device comprises a longitudinal movable frame, a height adjustment beam, a transverse movable frame, a secondary adjustment plate and an alignment adjustment plate. The lower end of the longitudinal movable frame is paved with a slide rail, and the longitudinal movable frame and the slide rail are slidably connected by rollers; height adjustment beams and a jacking mechanism are provided on both sides of the longitudinal movable frame, the height adjustment beam is slidably connected to the longitudinal movable frame, and the jacking mechanism is fixedly connected to the longitudinal movable frame, and the jacking mechanism is used for height adjustment of the height adjustment beam; a transverse movable frame is connected between the two height adjustment beams through a transverse adjustment component, and the lower end of the transverse movable frame is equipped with a secondary adjustment plate, and one side of the secondary adjustment plate is connected to the alignment adjustment plate through an adjustment docking component, and the lower ends of the secondary adjustment plate and the alignment adjustment plate are respectively provided with vacuum suction cups. The matching method based on the device makes the aircraft skin operation more convenient and the riveting operation more successful.

Description

Technical Field

[0001] The present invention relates to the technical field of aircraft skins, and in particular to a large-size aircraft skin joining device and method. Background Art

[0002] Aircraft skins are the dimensional components that surround the aircraft's frame and are fixed to it with adhesives or rivets, forming the aircraft's aerodynamic shape. The resulting structure, formed by the skin and frame, possesses significant load-bearing capacity and rigidity, yet is lightweight, effectively bearing and transmitting aerodynamic loads. The skin, after receiving aerodynamic forces, transmits these forces to the attached fuselage and wing frames. This complex force distribution, coupled with direct contact with the outside world, requires not only high strength and good plasticity, but also a smooth surface and high corrosion resistance.

[0003] When the top skin of an aircraft is on a fixed frame, it is inconvenient to move the skin due to its heavy weight, and it is difficult to align the edges of the skin. Workers need to manually push it up for riveting. When the top skin is pushed by workers, the riveting operation may fail due to inconvenient operation. Therefore, it is necessary to further optimize the existing aircraft skin technology to improve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a large-size aircraft skin matching device and matching method. The matching device makes the transportation and movement of the skin more convenient and easy. When the skins are matched, the fixed skin and the skin to be fixed can be adsorbed simultaneously by the vacuum suction cup 1 at the lower end of the secondary adjustment plate and the vacuum suction cup 2 at the lower end of the alignment adjustment plate. The edge skins between them are aligned and fitted by adjusting the matching components, thereby making the riveting operation more convenient.

[0005] The present invention is achieved through the following technical solutions:

[0006] A large-size aircraft skin joint device includes a longitudinal moving frame, a height adjustment beam, a transverse moving frame, a secondary adjustment plate and an alignment adjustment plate.

[0007] The lower end of the longitudinal movable frame is paved with a slide rail, and the longitudinal movable frame is slidably connected to the slide rail by rollers; height adjustment beams and jacking mechanisms are provided on both sides of the longitudinal movable frame, the height adjustment beam is slidably connected to the longitudinal movable frame, the jacking mechanism is fixedly connected to the longitudinal movable frame, the output end of the jacking mechanism is fixed to the height adjustment beam on the same side, and the jacking mechanism is used to adjust the height of the height adjustment beam; a transverse movable frame is connected between the two height adjustment beams through a transverse adjustment component, and the transverse adjustment component is used to adjust the transverse position of the transverse movable frame; the lower end of the transverse movable frame is equipped with a secondary adjustment plate, and one side of the secondary adjustment plate is connected to an alignment adjustment plate through an adjustment docking component, and the lower ends of the secondary adjustment plate and the alignment adjustment plate are respectively provided with vacuum suction cups for fixing the aircraft skin.

[0008] Furthermore, the lateral adjustment component includes a driving motor 1, a lateral auxiliary light rod, a lateral screw and a connecting piece. A lateral auxiliary light rod and a lateral screw are respectively arranged between the two height adjustment beams. The lateral auxiliary light rod is fixedly connected to the height adjustment beam, and the lateral screw is rotatably connected to the height adjustment beam; the output end of the driving motor 1 is fixed to the lateral screw, and the lateral movable frame is connected to the lateral auxiliary light rod and the lateral screw through a connecting piece.

[0009] Furthermore, the upper end of the transverse moving frame is fixed with a connecting piece by screws, the connecting pieces located on both sides of the top of the transverse moving frame are slidably connected to the two transverse auxiliary light rods, and the connecting piece located in the middle of the transverse moving frame is connected to the transverse screw rod through threads.

[0010] Furthermore, a winding box is fixed at the lower end of the horizontal moving frame, and a winding roller is provided inside the winding box. A driving motor 2 is fixed to one side of the winding box, and the output end of the driving motor 2 is fixed to the winding roller. A cable is wrapped around the outside of the winding roller, and one end of the cable is fixed to the winding roller; the other end is connected to the secondary adjustment plate through a hook; both ends of the horizontal moving frame are slidably connected to vertical auxiliary light rods, and the lower end of the vertical auxiliary light rod is detachably connected to the secondary adjustment plate.

[0011] Furthermore, a limit base and a first fixing frame are fixed on both sides of the upper end of the secondary adjustment plate, the limit base is located between two adjacent first fixing frames, the lower end of the vertical auxiliary light rod is plug-connected to the limit base, and a first limit bolt is passed through the first fixing frames at the same end of the secondary adjustment plate, the first limit bolt is plug-connected to the limit base and the vertical auxiliary light rod respectively, and the first limit bolt is fixed to the first fixing frame by a nut.

[0012] Furthermore, first auxiliary frames are provided at both ends of the secondary adjustment plate, second auxiliary frames are provided at both ends of the alignment adjustment plate, and auxiliary suction cups are provided at the lower ends of the first auxiliary frame and the second auxiliary frame;

[0013] The first connecting frame is fixed to the upper end of the first auxiliary frame, and one end of the first connecting frame away from the first auxiliary frame is sleeved on the outer side of the first limit bolt and is rotatably connected to the first limit bolt. The second connecting frame is fixed to the upper end of the second auxiliary frame, and one end of the second connecting frame away from the second auxiliary frame is rotatably connected to the alignment adjustment plate; the second limit bolts are inserted at both ends of the upper end of the alignment adjustment plate, and the second limit bolt and the alignment adjustment plate are fixed by brackets and nuts, and the second connecting frame is sleeved on the outer side of the second limit bolt, and the second connecting frame is rotatably connected to the alignment adjustment plate through the second limit bolt; the interior of the second connecting frame is rotatably connected to a connecting rod, and the other end of the connecting rod is slidably connected to the first connecting frame.

[0014] Furthermore, the adjustment docking assembly includes a longitudinal auxiliary light rod, a longitudinal screw and an adjustment dial. The internal sliding connection of the secondary adjustment plate is the longitudinal auxiliary light rod and the longitudinal screw. One end of the longitudinal auxiliary light rod is fixedly connected to the alignment adjustment plate, and one end of the longitudinal screw is rotatably connected to the alignment adjustment plate; the side of the secondary adjustment plate away from the alignment adjustment plate is rotatably connected to the adjustment dial, and the adjustment dial is threadedly connected to the longitudinal screw.

[0015] Furthermore, a limit baffle is fixed to one end of the longitudinal auxiliary polished rod and the longitudinal screw rod away from the alignment adjustment plate, and the limit baffle is used to limit the adjustment of the alignment adjustment plate.

[0016] Furthermore, both ends of the height adjustment beam are provided with limiting rollers, and the height adjustment beam is slidably connected to the longitudinal movable frame through the limiting rollers, so as to reduce the friction between the height adjustment beam and the longitudinal movable frame.

[0017] A method for joining large-sized aircraft skins, based on the aforementioned joining device, comprises the following steps:

[0018] S1. Assemble the above-mentioned joint device and wait for use;

[0019] S2. The skin to be fixed is sucked by the vacuum suction cups provided at the lower ends of the secondary adjustment plate and the alignment adjustment plate. The skin to be fixed is moved to the vicinity of the fixed skin by longitudinal movement of the longitudinal movable frame, height adjustment of the height adjustment beam, and lateral movement of the lateral movable frame;

[0020] S3. Align the skin to be fixed with the fixed skin by adjusting the docking assembly, and fit the skin to be fixed with the fixed skin by secondary height adjustment between the lateral movable frame and the secondary adjustment plate;

[0021] S4. Then, the secondary adjustment plate and the fixed skin are sucked and positioned by the vacuum suction cup at the lower end of the secondary adjustment plate, and the riveting operation can be carried out.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0023] 1. The present invention proposes a cleverly structured docking device. Through the coordinated design of multiple structural components, the device can be adjusted in the lateral, longitudinal and height directions, making the handling and movement of the skin more convenient and easy. When the skin is docked, the aircraft skin can be fixed by the vacuum suction cup at the lower end of the secondary adjustment plate and the alignment adjustment plate, thereby conveniently completing the riveting operation.

[0024] 2. In the present invention, a preferred structural method is proposed, in which a vacuum suction cup 1 is provided at the lower end of the secondary adjustment plate, and a vacuum suction cup 2 is provided at the lower end of the alignment adjustment plate. When the skins are docked, the fixed skin and the skin to be fixed can be adsorbed simultaneously by the vacuum suction cup 1 at the lower end of the secondary adjustment plate and the vacuum suction cup 2 at the lower end of the alignment adjustment plate, and the edge skins between them can be aligned and fitted by adjusting the docking assembly, thereby making the riveting operation more convenient.

[0025] Through the structural design of the auxiliary suction cup, the fixing range of the skin can be increased when the skin is docked, making the fixation of the skin more stable, and through the connection structure between the first auxiliary frame and the secondary adjustment plate, when the secondary adjustment plate is separated from the lateral moving frame, the first auxiliary frame can be separated from the secondary adjustment plate at the same time; the connection structure design of the second auxiliary frame and the alignment adjustment plate enables the second auxiliary frame to be quickly separated from the alignment adjustment plate, so that the auxiliary suction cup can also be disassembled.

[0026] 3. In the present invention, the connection structure design between the transverse moving frame and the secondary adjustment plate allows the secondary adjustment plate to be disassembled and separated from the transverse moving frame, making replacement, cleaning and maintenance of the device more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the overall structure of the present invention.

[0028] Figure 2 It is a top view of the overall structure of the present invention.

[0029] Figure 3 It is a schematic diagram of the connection structure between the transverse moving frame and the secondary adjustment plate of the present invention.

[0030] Figure 4 It is a partial structural diagram of the connection structure between the transverse moving frame and the secondary adjustment plate of the present invention.

[0031] Figure 5 This is a bottom view of the connection structure between the secondary adjustment plate and the alignment adjustment plate of the present invention.

[0032] Figure 6 It is a schematic diagram of the connection structure of the auxiliary suction cup, the secondary adjustment plate and the alignment adjustment plate of the present invention.

[0033] Figure 7This is a top view of the connection structure between the auxiliary suction cup, the secondary adjustment plate, and the alignment adjustment plate of the present invention.

[0034] Figure 8 This is a bottom view of the connection structure between the auxiliary suction cup, the secondary adjustment plate, and the alignment adjustment plate of the present invention.

[0035] Among them, 1. longitudinal movable frame; 2. height adjustment beam; 3. transverse movable frame; 4. secondary adjustment plate; 5. alignment adjustment plate; 6. lifting mechanism; 7. driving motor 1; 8. transverse auxiliary light rod; 9. transverse screw; 10. connecting piece; 11. vertical auxiliary light rod; 12. winding box; 13. winding roller; 14. driving motor 2; 15. limiting base; 16. first fixed frame; 17. first limiting bolt; 18. longitudinal auxiliary light rod; 19. longitudinal screw; 20. adjusting turntable; 21. vacuum suction cup 1; 22. vacuum suction cup 2; 23. first auxiliary frame; 24. second auxiliary frame; 25. second connecting frame; 26. connecting rod; 27. first connecting frame; 28. second limiting bolt. DETAILED DESCRIPTION

[0036] To facilitate public understanding of the present invention, the present invention will be further described in detail below with reference to examples, but the embodiments of the present invention are not limited thereto.

[0037] Example 1

[0038] See also Figure 1-8 , a large-size aircraft skin matching device includes a longitudinal movable frame 1, a height adjustment beam 2, a lateral movable frame 3, a secondary adjustment plate 4 and an alignment adjustment plate 5. The lower end of the longitudinal movable frame 1 is paved with a slide rail, and the longitudinal movable frame 1 is slidably connected to the slide rail by a roller for longitudinal position adjustment of the longitudinal movable frame 1; height adjustment beams 2 and jacking mechanisms 6 are provided on both sides of the longitudinal movable frame 1, the height adjustment beam 2 is slidably connected to the longitudinal movable frame 1, and the jacking mechanism 6 is fixedly connected to the longitudinal movable frame 1, and the output end of the jacking mechanism 6 is fixed to the height adjustment beam 2 on the same side for height adjustment of the height adjustment beam 2. In order to make the movement of the height adjustment beam 2 smoother, limiting rollers are provided at both ends of the height adjustment beam 2, and the height adjustment beam 2 is slidably connected to the longitudinal movable frame 1 through the limiting rollers for reducing the friction between the height adjustment beam 2 and the longitudinal movable frame 1.

[0039] The longitudinal movable frame 1 can be pushed by the slide rail laid at the lower end of the longitudinal movable frame 1 to adjust the longitudinal position of the longitudinal movable frame 1, thereby realizing the adjustment of the longitudinal position of the skin; the height adjustment beam 2 can be pushed by the jacking mechanism 6 to drive the height adjustment beam 2 to move up and down; thereby realizing the first adjustment of the height position of the skin.

[0040] A transverse moving frame 3 is connected between the two height adjustment beams 2 via a transverse adjustment component, which is used to adjust the transverse position of the transverse moving frame 3 .

[0041] Specifically, the lateral adjustment component includes a drive motor 7, a lateral auxiliary light rod 8, a lateral screw 9 and a connecting piece 10. Two lateral auxiliary light rods 8 and a lateral screw 9 are respectively arranged between the two height adjustment beams 2. The lateral auxiliary light rod 8 is fixedly connected to the height adjustment beam 2, and the lateral screw 9 is rotatably connected to the height adjustment beam 2; a drive motor 7 is also fixed to the outside of one of the height adjustment beams 2, and the output end of the drive motor 7 is fixed to the lateral screw 9; six connecting pieces 10 are fixed to the upper end of the lateral moving frame 3 by screws, the four connecting pieces 10 located on both sides of the top of the lateral moving frame 3 are slidably connected to the two lateral auxiliary light rods 8, and the two connecting pieces 10 located in the middle of the lateral moving frame 3 are threadedly connected to the lateral screw 9.

[0042] The transverse screw 9 can be driven to rotate by starting the driving motor 7, so that the two connecting parts 10 can be connected to the transverse screw 9 through threaded connection, so that when the transverse screw 9 rotates, the transverse moving frame 3 is driven to move laterally, thereby realizing the adjustment of the transverse position of the skin; and the connection method between the connecting part 10 and the transverse moving frame 3 makes the installation and disassembly of the transverse moving frame 3 relatively simple.

[0043] The lower end of the transverse moving frame 3 is equipped with a secondary adjustment plate 4.

[0044] Among them, in order to facilitate the secondary adjustment of the height of the skin to achieve the effect of fine-tuning, a winding box 12 is fixed at the lower end of the horizontal moving frame 3, and a winding roller 13 is rotated inside the winding box 12. A driving motor 2 14 is fixed to one side of the winding box 12, and the output end of the driving motor 2 14 is fixed to the winding roller 13. A cable is wrapped around the outside of the winding roller 13, one end of the cable is fixed to the winding roller 13, and the other end of the cable is connected to the secondary adjustment plate 4 through a hook; two vertical auxiliary light rods 11 are slidably connected to both ends of the horizontal moving frame 3, and the lower end of the vertical auxiliary light rod 11 is detachably connected to the secondary adjustment plate 4.

[0045] By starting the second drive motor 14, the winding roller 13 can be driven to rotate inside the winding box 12, thereby causing the cable wrapped around the outside of the winding box 12 to be reeled in and released. The cable is connected to the secondary adjustment plate 4 through a hook, so that when the cable is reeled in and released, the secondary adjustment plate 4 is driven to move up and down, thereby performing secondary adjustment on the height of the skin to achieve a fine-tuning effect; and through the connection between the vertical auxiliary light rod 11 and the secondary adjustment plate 4, and the sliding of the vertical auxiliary light rod 11 and the winding roller 13, the height adjustment of the secondary adjustment plate 4 is more stable.

[0046] Among them, in order to realize the disassembly and separation of the secondary adjustment plate 4 and the horizontal moving frame 3, and to facilitate the replacement, cleaning and maintenance of the secondary adjustment plate 4, two limit bases 15 and two first fixing frames 16 are fixed at both ends of the upper end of the secondary adjustment plate 4. The two limit bases 15 are located between the two first fixing frames 16, and the lower end of the vertical auxiliary light rod 11 is plug-connected to the limit base 15. A first limit bolt 17 is passed through the two first fixing frames 16 at the same end of the secondary adjustment plate 4. The first limit bolt 17 and the limit base 15, the first limit bolt 17 and the vertical auxiliary light rod 11 are all plug-connected, and the first limit bolt 17 is fixed to the two first fixing frames 16 by a nut.

[0047] By plugging the vertical auxiliary light rod 11 into the limiting base 15, the first limiting bolt 17 limits the vertical auxiliary light rod 11, making it impossible for the vertical auxiliary light rod 11 to be separated from the limiting base 15, thereby achieving the fixing effect of the vertical auxiliary light rod 11 and the secondary adjustment plate 4; when the secondary adjustment plate 4 needs to be separated from the horizontal moving frame 3, the secondary adjustment plate 4 is first moved to the ground through the secondary height adjustment, and the first limiting bolt 17 is removed, so that the vertical auxiliary light rod 11 can be separated from the limiting base 15, the hook is separated from the secondary adjustment plate 4, the height of the horizontal moving frame 3 is increased, and the vertical auxiliary light rod 11 is pulled out from the limiting base 15, that is, the disassembly and separation of the secondary adjustment plate 4 and the horizontal moving frame 3 is completed.

[0048] One side of the secondary adjustment plate 4 is connected to the alignment adjustment plate 5 through an adjustment docking assembly. The lower ends of the secondary adjustment plate 4 and the alignment adjustment plate 5 are respectively fixed with vacuum suction cup 1 21 and vacuum suction cup 2 22, which are used to fix the aircraft skin. The skin edges are aligned by adjusting the docking assembly.

[0049] Specifically, the adjustment docking assembly includes a longitudinal auxiliary light rod 18, a longitudinal screw 19 and an adjustment dial 20. The secondary adjustment plate 4 is internally slidingly connected with the longitudinal auxiliary light rod 18 and the longitudinal screw 19. One end of the longitudinal auxiliary light rod 18 is fixedly connected to the alignment adjustment plate 5, and one end of the longitudinal screw 19 is rotatably connected to the alignment adjustment plate 5; the side of the secondary adjustment plate 4 away from the alignment adjustment plate 5 is rotatably connected to the adjustment dial 20, and the adjustment dial 20 is threadedly connected to the longitudinal screw 19; wherein, in order to prevent the alignment adjustment plate 5 from falling off, the longitudinal auxiliary light rod 18 and the longitudinal screw 19 are fixed with a limit baffle at one end away from the alignment adjustment plate 5, which is used to limit the adjustment of the alignment adjustment plate 5.

[0050] The skin to be fixed is adsorbed by the alignment adjustment plate 5, and the skin is adsorbed and fixed by the secondary adjustment plate 4. By rotating the adjustment dial 20 and the rotational connection with the secondary adjustment plate 4, and the threaded connection between the adjustment dial 20 and the longitudinal screw 19, when the adjustment dial 20 is rotated, the alignment adjustment plate 5 can be driven to move in the horizontal direction by the longitudinal screw 19. By moving the alignment adjustment plate 5, the skin to be fixed adsorbed by the alignment adjustment plate 5 is moved to the edge of the fixed skin and aligned and fitted, and then the riveting operation can be carried out to complete the fixation of the skin.

[0051] Specifically, in order to increase the fixing range of the skin when the skin is docked, so that the fixing of the skin is more stable, two first auxiliary frames 23 are set at both ends of the secondary adjustment plate 4, and two second auxiliary frames 24 are set at both ends of the alignment adjustment plate 5. The lower ends of the first auxiliary frame 23 and the second auxiliary frame 24 are both provided with auxiliary suction cups; the upper end of the first auxiliary frame 23 is fixed with a first connecting frame 27, and the end of the first connecting frame 27 away from the first auxiliary frame 23 is sleeved on the outer side of the first limiting bolt 17 and is rotatably connected to the first limiting bolt 17. The upper end of the second auxiliary frame 24 A second connecting frame 25 is fixed, and one end of the second connecting frame 25 away from the second auxiliary frame 24 is rotatably connected to the alignment adjustment plate 5; second limit bolts 28 are inserted at both ends of the upper end of the alignment adjustment plate 5, and the second limit bolt 28 and the alignment adjustment plate 5 are fixed by a bracket and a nut. The second connecting frame 25 is sleeved on the outside of the second limit bolt 28, and the second connecting frame 25 is rotatably connected to the alignment adjustment plate 5 through the second limit bolt 28; the interior of the second connecting frame 25 is rotatably connected to a connecting rod 26, and the other end of the connecting rod 26 is slidably connected to the first connecting frame 27.

[0052] After the skins are aligned and fitted through the above-mentioned adjustment of the docking assembly, the auxiliary suction cups at the lower ends of the first auxiliary frame 23 and the second auxiliary frame 24 can be used to adsorb the fixed skin and the skin to be fixed, making the riveting operation more stable; and when dealing with larger skins, the auxiliary suction cups can be used to increase the fixing range.

[0053] When the lateral moving frame 3 is disassembled and separated from the secondary adjustment plate 4, after the first limit bolt 17 is removed, the first connecting frame 27 loses connection with the secondary adjustment plate 4; the second limit bolt 28 at the upper end of the alignment adjustment plate 5 can be removed to disconnect the connection between the second connecting frame 25 and the alignment adjustment plate 5, thereby completing the disassembly of the auxiliary suction cup.

[0054] Method for joining large-size aircraft skins:

[0055] S1. Complete the assembly of the large-size aircraft skin using the above-mentioned assembly device and set it aside for use;

[0056] S2. The skin to be fixed is adsorbed by the vacuum suction cup 22 at the lower end of the alignment adjustment plate 5. The skin to be fixed can be moved to the vicinity of the fixed skin by longitudinal movement of the longitudinal movable frame 1, height adjustment of the height adjustment beam 2, and lateral movement of the lateral movable frame 3;

[0057] S3. Align the skin to be fixed with the fixed skin by adjusting the docking assembly, and fit the skin to be fixed with the fixed skin by secondary height adjustment between the lateral movable frame 3 and the secondary adjustment plate 4;

[0058] S4. Use the vacuum suction cup 21 at the lower end of the secondary adjustment plate 4 to suck and position the secondary adjustment plate 4 and the fixed skin, and then the riveting operation can be carried out.

[0059] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A large-scale aircraft skin jointing device, characterized by: It includes a longitudinal moving frame (1), a height adjustment beam (2), a transverse moving frame (3), a secondary adjustment plate (4) and an alignment adjustment plate (5), The lower end of the longitudinal movable frame (1) is paved with a slide rail, and the longitudinal movable frame (1) is slidably connected to the slide rail via a roller; height adjustment beams (2) and jacking mechanisms (6) are provided on both sides of the longitudinal movable frame (1); the height adjustment beam (2) is slidably connected to the longitudinal movable frame (1); the jacking mechanism (6) is fixedly connected to the longitudinal movable frame (1); the output end of the jacking mechanism (6) is fixed to the height adjustment beam (2) on the same side; the jacking mechanism (6) is used to adjust the height of the height adjustment beam (2); a transverse movable frame (3) is connected between the two height adjustment beams (2) via a transverse adjustment component, and the transverse adjustment component is used to adjust the transverse position of the transverse movable frame (3); a secondary adjustment plate (4) is assembled at the lower end of the transverse movable frame (3), and one side of the secondary adjustment plate (4) is connected to an alignment adjustment plate (5) via an adjustment docking component, and the lower ends of the secondary adjustment plate (4) and the alignment adjustment plate (5) are respectively provided with vacuum suction cups for fixing the aircraft skin; The adjustment docking assembly comprises a longitudinal auxiliary light rod (18), a longitudinal screw rod (19) and an adjustment dial (20); the longitudinal auxiliary light rod (18) and the longitudinal screw rod (19) are slidably connected inside the secondary adjustment plate (4); one end of the longitudinal auxiliary light rod (18) is fixedly connected to the alignment adjustment plate (5), and one end of the longitudinal screw rod (19) is rotatably connected to the alignment adjustment plate (5); the side of the secondary adjustment plate (4) away from the alignment adjustment plate (5) is rotatably connected to the adjustment dial (20), and the adjustment dial (20) is connected to the longitudinal screw rod (19) by a thread.

2. The large-size aircraft skin assembly device according to claim 1, characterized in that: The lateral adjustment component comprises a driving motor (7), a lateral auxiliary light rod (8), a lateral screw (9) and a connecting piece (10); a lateral auxiliary light rod (8) and a lateral screw (9) are respectively provided between the two height adjustment beams (2); the lateral auxiliary light rod (8) is fixedly connected to the height adjustment beam (2), and the lateral screw (9) is rotatably connected to the height adjustment beam (2); the output end of the driving motor (7) is fixed to the lateral screw (9), and the lateral moving frame (3) is connected to the lateral auxiliary light rod (8) and the lateral screw (9) through the connecting piece (10).

3. The large-size aircraft skin assembly device according to claim 2, characterized in that: The upper end of the transverse moving frame (3) is fixed with a connecting piece (10) by screws, the connecting pieces (10) located on both sides of the top end of the transverse moving frame (3) are slidably connected to the two transverse auxiliary light rods (8), and the connecting piece (10) located in the middle of the transverse moving frame (3) is connected to the transverse screw rod (9) by threads.

4. The large-size aircraft skin assembly device according to claim 1, characterized in that: A winding box (12) is fixed at the lower end of the transverse movable frame (3), a winding roller (13) is provided inside the winding box (12), a driving motor 2 (14) is fixed on one side of the winding box (12), an output end of the driving motor 2 (14) is fixed to the winding roller (13), a cable is wound around the outside of the winding roller (13), one end of the cable is fixed to the winding roller (13), and the other end is connected to the secondary adjustment plate (4) through a hook; both ends of the transverse movable frame (3) are slidably connected to a vertical auxiliary light rod (11), and the lower end of the vertical auxiliary light rod (11) is detachably connected to the secondary adjustment plate (4).

5. The large-size aircraft skin assembly device according to claim 4, characterized in that: A limiting base (15) and a first fixing frame (16) are fixed on both sides of the upper end of the secondary adjustment plate (4), the limiting base (15) is located between two adjacent first fixing frames (16), the lower end of the vertical auxiliary light rod (11) is plug-connected to the limiting base (15), a first limiting bolt (17) is passed through the first fixing frames (16) at the same end of the secondary adjustment plate (4), the first limiting bolt (17) is plug-connected to the limiting base (15) and the vertical auxiliary light rod (11), and the first limiting bolt (17) is fixed to the first fixing frame (16) through a nut.

6. The large-size aircraft skin assembly device according to claim 5, characterized in that: First auxiliary frames (23) are provided at both ends of the secondary adjustment plate (4), second auxiliary frames (24) are provided at both ends of the alignment adjustment plate (5), and auxiliary suction cups are provided at the lower ends of the first auxiliary frame (23) and the second auxiliary frame (24); A first connecting frame (27) is fixed to the upper end of the first auxiliary frame (23), and one end of the first connecting frame (27) away from the first auxiliary frame (23) is sleeved on the outer side of the first limiting bolt (17) and is rotatably connected to the first limiting bolt (17). A second connecting frame (25) is fixed to the upper end of the second auxiliary frame (24), and one end of the second connecting frame (25) away from the second auxiliary frame (24) is rotatably connected to the alignment adjustment plate (5); second limiting bolts (28) are inserted at both ends of the upper part of the alignment adjustment plate (5), and the second limiting bolt (28) and the alignment adjustment plate (5) are fixed by a bracket and a nut. The second connecting frame (25) is sleeved on the outer side of the second limiting bolt (28), and the second connecting frame (25) is rotatably connected to the alignment adjustment plate (5) through the second limiting bolt (28); the interior of the second connecting frame (25) is rotatably connected to a connecting rod (26), and the other end of the connecting rod (26) is slidably connected to the first connecting frame (27).

7. The large-size aircraft skin assembly device according to claim 1, characterized in that: The longitudinal auxiliary light rod (18) and the longitudinal screw rod (19) are both fixed with a limit baffle at one end away from the alignment adjustment plate (5), and the limit baffle is used to limit the adjustment of the alignment adjustment plate (5).

8. The large-size aircraft skin assembly device according to claim 1, characterized in that: Limit rollers are provided at both ends of the height adjustment beam (2), and the height adjustment beam (2) is slidably connected to the longitudinal movable frame (1) via the limit rollers, so as to reduce friction between the height adjustment beam (2) and the longitudinal movable frame (1).

9. A method for joining large-sized aircraft skins, characterized in that: The alignment device according to claim 1 comprises the following steps: S1. Assemble the mating device according to claim 1 and prepare for use; S2, the skin to be fixed is adsorbed by the vacuum suction cups provided at the lower ends of the secondary adjustment plate (4) and the alignment adjustment plate (5), and the skin to be fixed can be moved to the vicinity of the fixed skin by the longitudinal movement of the longitudinal moving frame (1), the height adjustment of the height adjustment beam (2), and the lateral movement of the lateral moving frame (3); S3, aligning the skin to be fixed with the fixed skin by adjusting the docking assembly, and fitting the skin to be fixed with the fixed skin by secondary height adjustment between the lateral movable frame (3) and the secondary adjustment plate (4); S4. The secondary adjustment plate (4) and the fixed skin are then positioned by adsorbing the vacuum suction cup at the lower end of the secondary adjustment plate (4), and the riveting operation can be carried out.

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