A multi-degree-of-freedom mounting device for a wing leading edge

Abstract

The application provides a wing leading edge multi-degree-of-freedom mounting device, and belongs to the technical field of aircraft assembly, and specifically comprises a base, a support frame, a mounting frame, a working platform and a clamping plate assembly; the support frame is slidably mounted on the base and slides along the heading direction of the wing; the base is provided with a limiting assembly for limiting the position of the support frame on the base; the mounting frame is rotatably mounted on the support frame, and the rotating shaft of the mounting frame is arranged in the vertical direction; the support frame is provided with a rotary driving assembly for driving the rotation of the mounting frame; the working platform is mounted on the mounting frame through an adjusting assembly, the adjusting assembly is used for adjusting the height and pitch angle of the working platform; the clamping plate assembly is slidably mounted on one side of the working platform and is used for fixing the wing leading edge assembly; and the clamping plate assembly slides along the span direction of the wing. Through the processing scheme, the assembly precision and efficiency of the wing leading edge are improved.

Description

Technical Field

[0001] This application relates to the field of aircraft assembly, and in particular to a multi-degree-of-freedom mounting device for the leading edge of a wing. Background Technology

[0002] The assembly of the leading edge and the outer wing is usually carried out at the outer wing mating station. First, based on the horizontal measurement point data on the outer wing box panel, the outer wing attitude is adjusted through the support joint. Then, the leading edge is adjusted with the outer wing as a reference. After the coaxiality of the assembly holes of the leading edge and the outer wing meets the requirements, the contact surfaces of the two are made to fit completely. Finally, the riveting holes of the two components are made and connected to complete the mating. The measurement accuracy of the horizontal measurement points of the outer wing is usually required to be ±0.5mm. Due to the large span of the outer wing box, there is no theoretical position for the mating area between the leading edge and the outer wing of each aircraft, and the actual state is different. The leading edge needs to be continuously adjusted in attitude based on the outer wing box. Currently, a common method is to set up a hoisting process joint on the leading edge, hoist the leading edge in the air, and control its attitude by manually applying force and fixing it with C-clamps. This method is difficult to adjust and fix the attitude of the leading edge, has high operational difficulty, and low assembly accuracy and efficiency. Alternatively, the mating process of the leading edge can be arranged in the wing box assembly jig, and the assembly accuracy of the leading edge can be ensured by adding a series of positioners. However, this method will significantly increase the size and complexity of the assembly jig and is likely to exceed the total process time requirement of the station, affecting the assembly progress and hindering lean manufacturing. Summary of the Invention

[0003] In view of this, this application provides a multi-degree-of-freedom mounting device for the leading edge of a wing, which solves the problems in the prior art.

[0004] The multi-degree-of-freedom mounting device for the leading edge of a wing provided in this application adopts the following technical solution: A multi-degree-of-freedom mounting device for the leading edge of a wing includes a base, a support frame, a mounting frame, a working platform, and a clamping plate assembly; The support frame is slidably mounted on the base, and the support frame slides along the heading direction of the wing. The base is provided with a limiting component for limiting the position of the support frame on the base. The mounting frame is rotatably mounted on the support frame, and the rotation axis of the mounting frame is set in the vertical direction. The support frame is provided with a rotation drive component for driving the mounting frame to rotate. The working platform is mounted on the mounting frame through an adjustment component, which is used to adjust the height and pitch angle of the working platform. The clamping plate assembly is slidably mounted on one side of the working platform, and the clamping plate assembly is used to fix the leading edge assembly of the wing. The clamping plate assembly slides along the spanwise direction of the wing.

[0005] Optionally, the base is provided with two parallel guide rail pairs, and the support frame and the slider of the guide rail pairs are fixedly connected; a base plate is provided between the two guide rail pairs, the base plate and the base are relatively stationary, and two opposing fixing plates are provided on the base plate; The support frame is provided with a connecting rod, the connecting rod is provided with a mounting plate, and a top plate is rotatably mounted on the mounting plate. The rotation axis of the top plate and the mounting plate is higher than the height of the fixed plate. The top plate includes a first state and a second state. When the top plate is in the first state, the bottom of the top plate is located between the two fixed plates; when the top plate is in the second state, the bottom edge of the top plate is higher than the fixed plates. An adjusting screw is threaded onto the fixed plate. The adjusting screw passes through the fixed plate and its length is set along the length of the guide rail pair. The adjusting screw is used to abut against the top plate in the first state.

[0006] Optionally, the support frame is provided with multiple universal balls, the bottom surface of the mounting frame contacts the universal balls, and the rotary drive assembly is a manual horizontal screw jack. The output end of the manual horizontal screw jack is hinged to the mounting frame, and the hinge shaft is vertically set.

[0007] Optionally, the manual horizontal screw jack is equipped with a stop lock.

[0008] Optionally, the adjustment assembly includes three manual vertical screw jacks, and the working platform includes a first side and a second side opposite to each other. Two vertical screw jacks are located near the first side and correspond to the two ends of the first side, respectively. Another manual vertical screw jack is located near the second side and corresponds to the middle of the second side. The housing of the manual vertical screw jack is mounted on a mounting frame. The output end of the vertical screw jack is hinged to the working platform, and the hinge axis of the vertical screw jack is arranged along the spanwise direction of the wing.

[0009] Optionally, the working platform is provided with a sliding plate, the sliding direction of the sliding plate is perpendicular to the sliding direction of the support frame, and the clamping plate assembly includes multiple leading edge clamping plates installed on the sliding plate. The leading edge clamping plates are provided with a groove structure that matches the shape of the leading edge of the wing, and the multiple leading edge clamping plates are arranged sequentially along the sliding direction of the sliding plate. The leading edge plate is equipped with a hook for fixing the wing leading edge to the leading edge plate.

[0010] Optionally, the leading edge plate is fixed with measuring plates corresponding to the upper and lower surfaces of the wing leading edge above and below the groove. One end of the measuring plate and the leading edge fixed on the plate maintain a preset gap, and the other end of the measuring plate is used to extend to the upper and lower surfaces of the outer wing box when docking the leading edge and the wing box. The measuring plate has chord percentage markings. The deviation between the leading edge of the wing and the outer wing box is determined based on the various percentage markings and the corresponding chord percentage markings on the upper and lower surfaces of the outer wing box. The measuring plate is provided with front beam markings. The deviation of the leading edge wing box is judged based on the distance between the front beam markings and the front beam plane on the outer wing box.

[0011] In summary, this application includes the following beneficial technical effects: This application solves the problem of low assembly accuracy and efficiency caused by the difficulty in controlling the leading edge attitude in traditional hoisting methods. This application can complete the adjustment of the movement of the leading edge product along the heading, span, and elevation directions, as well as the pitch and yaw angles, when it is assembled. It realizes precise adjustment of the leading edge with multiple degrees of freedom, which greatly reduces the labor intensity of operators and improves assembly accuracy and efficiency. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 A schematic diagram of the overall structure of the multi-degree-of-freedom mounting device on the leading edge of the wing; Figure 2 This is a schematic diagram of the installation structure for the adjusting bolts; Figure 3 This is a schematic diagram of the support frame structure; Figure 4 A schematic diagram of the structure with the top plate in its first state; Figure 5 This is a schematic diagram of the working platform. Figure 6 This is a schematic diagram of the card plate assembly.

[0014] Explanation of reference numerals in the attached drawings: 1. Base; 11. First limiting seat; 12. Second limiting seat; 13. Third limiting seat; 14. First limiting pin; 15. Second limiting pin; 16. Guide rail pair; 2. Support frame; 21. Base plate; 22. Fixing plate; 23. Connecting rod; 24. Mounting plate; 25. Top plate; 26. Adjusting screw; 27. Fixing bolt; 3. Mounting bracket; 31. Rotary drive assembly; 32. Universal ball; 33. Manual horizontal screw jack; 34. Stop lock; 35. Manual vertical screw jack; 4. Working platform; 41. Sliding plate; 42. Push plate; 43. Vertical plate; 44. Tightening bolt; 5. Clamping plate assembly; 51. Front edge clamping plate; 52. Hook clamp; 53. Groove; 54. Measuring plate; 55. Chord percentage gradation line; 56. Front beam gradation line. Detailed Implementation

[0015] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0016] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0018] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0019] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0020] This application provides a multi-degree-of-freedom mounting device for the leading edge of a wing.

[0021] like Figures 1 to 3 As shown, a multi-degree-of-freedom mounting device for the leading edge of an airfoil includes a base 1, a support frame 2, a mounting frame 3, a working platform 4, and a clamping plate assembly 5.

[0022] The support frame 2 is slidably mounted on the base 1, and the support frame 2 slides along the heading direction of the wing. The base 1 is provided with a limiting component for limiting the position of the support frame 2 on the base 1. The mounting frame 3 is rotatably mounted on the support frame 2, and the rotation axis of the mounting frame 3 is set in the vertical direction. The support frame 2 is provided with a rotation drive component 31 for driving the mounting frame 3 to rotate. The working platform 4 is mounted on the mounting frame 3 through an adjustment component, which is used to adjust the height and pitch angle of the working platform 4. The clamping plate component 5 is slidably mounted on one side of the working platform 4, and the clamping plate component 5 is used to fix the leading edge component of the wing. The clamping plate component 5 slides along the spanwise direction of the wing.

[0023] When installing the wing leading edge, the support frame 2 is fixed on the base 1 by the limiting component. The wing leading edge is then installed on the clamping plate assembly 5. The support frame 2 is then released from the base 1, and its position on the base 1 is adjusted by sliding the support frame 2 to adjust the directional distance between the wing leading edge and the outer wing box. After adjustment, the support frame 2 is re-fixed on the base 1. The rotation angle of the mounting frame 3 is adjusted by the rotation drive assembly 31, causing the worktable and the wing leading edge to rotate, adjusting the gap between the left and right ends of the wing leading edge and the mating surface of the outer wing box. The height of the work platform 4 is adjusted by the adjustment component, adjusting the height difference between the mounting holes of the wing leading edge and the outer wing box. The pitch angle of the mounting frame 3, the worktable, and the wing leading edge is adjusted by the adjustment component to ensure that the upper and lower end faces of the wing leading edge are aligned with the gap of the outer wing box. The spanwise position of the wing leading edge is adjusted by sliding the clamping plate assembly 5 on the worktable, aligning the wing leading edge and the outer wing box in the spanwise direction. After the leading edge and the outer wing box are aligned and assembled, separate the clamping plate assembly 5 from the wing leading edge, release the fixing of the support frame 2 and the base 1, slide the support frame 2 away from the wing leading edge, and wait for the installation of the next wing leading edge.

[0024] The limiting assembly includes a first limiting seat 11, a second limiting seat 12, and a third limiting seat 13 arranged sequentially on the base 1 along the sliding direction of the support frame 2, and a first limiting pin 14 and a second limiting pin 15 arranged sequentially on the support frame 2 along the sliding direction of the support frame 2. Before installing the wing leading edge, the support frame 2 is slid until the limiting holes on the first limiting pin 14 and the first limiting seat 11 are aligned, and the first limiting pin 14 is inserted into the limiting hole on the first limiting seat 11 to limit the sliding of the support frame 2. When docking the wing leading edge and the outer wing box, after adjusting the distance between the wing leading edge, the outer wing box and the heading, insert the first limiting pin 14 into the limiting hole of the second limiting seat 12, and insert the second limiting pin 15 into the limiting hole of the third limiting seat 13. It should be noted that before docking the wing leading edge and the outer wing box, the theoretical position of the wing leading edge at the docking time will be calculated, and the position of the support frame 2 will be determined according to the theoretical position. Thus, the positions of the second limiting seat 12 and the third limiting seat 13 will be determined on the base 1 in advance. The positions of the first limiting pin 14 and the second limiting pin 15 are set according to the position and spacing of the second limiting seat 12 and the third limiting seat 13, so that when the support frame 2 is in the theoretical position, the limiting holes of the first limiting pin 14 and the second limiting seat 12 are aligned, and the limiting holes of the second limiting pin 15 and the third limiting seat 13 are aligned. The installation method of the first limiting pin 14 and the second limiting pin 15 on the support frame 2 is as follows: the support frame 2 is provided with a limiting plate at the position corresponding to the first limiting pin 14 and the second limiting pin 15, and the limiting plate is provided with a hole for the first limiting pin 14 and the second limiting pin 15 to pass through.

[0025] The base 1 is provided with two parallel guide rail pairs 16, and the support frame 2 is fixedly connected to the slider of the guide rail pairs 16; there are two second limiting seats 12 and two third limiting seats 13. Each guide rail pair 16 is provided with a first limiting seat 11, a second limiting seat 12 and a third limiting seat 13. The second limiting seat 12 and the third limiting seat 13 are on the side opposite to the two guide rail pairs 16. Similarly, there are two first limiting pins 14 and two limiting pins 15.

[0026] like Figures 1 to 4 As shown, a base plate 21 is provided between the two guide rail pairs 16. The base plate 21 and the base 1 are relatively stationary. Two opposing fixing plates 22 are provided on the base plate 21. The height of the fixing plates 22 is lower than the height of the support frame 2 to avoid the fixing plates 22 affecting the movement of the support frame 2. A connecting rod 23 is provided on the support frame 2. A mounting plate 24 is provided on the connecting rod 23. A top plate 25 is rotatably mounted on the mounting plate 24. The rotation axis of the top plate 25 and the mounting plate 24 is higher than the height of the fixing plates 22. The top plate 25 includes a first state. In the first state, the bottom of the top plate 25 is located between the two fixed plates 22, and the bottom of the top plate 25 is lower than the bottom of the support frame 2. In the second state, the bottom edge of the top plate 25 is higher than the fixed plate 22. An adjusting screw 26 is threaded onto the fixed plate 22. The adjusting screw 26 passes through the fixed plate 22. The length direction of the adjusting screw 26 is set along the length direction of the guide rail pair 16. The adjusting screw 26 is used to abut against the top plate 25 in the first state. After installing the wing leading edge onto the clamping plate assembly 5, manually push the support frame 2 so that the top plate 25 on the support frame 2 is positioned between the fixed plates 22. Then, position the top plate 25 in the first state and rotate the adjusting screw 26 to push the top plate 25 to finely adjust the position of the support frame 2. This prevents the support frame 2 from shifting excessively due to manual pushing and causing the wing leading edge to collide with the outer wing box. After adjusting the position with the adjusting screw 26, the limiting holes on the first limiting pin 14 and the second limiting seat 12 are aligned, and the limiting holes on the second limiting pin 15 and the third limiting seat 13 are aligned. Insert the first limiting pin 14 and the second limiting pin 15 to fix the position of the support frame 2.

[0027] Specifically, the implementation of the first and second states of the top plate 25 is as follows: the top plate 25 is rectangular, and the mounting plate 24 is also rectangular. The length direction of the mounting plate 24 is horizontal and perpendicular to the sliding direction of the support frame 2. The bottom of the mounting plate 24 is higher than the fixed plate 22. The top plate 25 has a first hole and a second hole, and the mounting plate 24 has a third hole, a fourth hole, a fifth hole, and a sixth hole. When the top plate 25 is in the first state, the length direction of the top plate 25 is vertical, and the first and third holes on the top plate 25 are aligned, as are the second and fourth holes. The fixing bolts 27 pass through the first and third holes, as well as the second and fourth holes, and fix the top plate 25 in the first state to the mounting plate 24. The top plate 25 is rotated so that its length is horizontal, and the top plate 25 is in the second state. At this time, the first and fifth holes on the top plate 25 are aligned, and the second and sixth holes are aligned. The fixing bolts 27 pass through the first and fifth holes, as well as the second and sixth holes, and fix the top plate 25 in the second state to the mounting plate 24.

[0028] The support frame 2 is equipped with multiple universal balls 32. The bottom surface of the mounting frame 3 contacts the universal balls 32. The rotary drive assembly 31 is a manual horizontal screw jack 33. The output end of the manual horizontal screw jack 33 is hinged to the mounting frame 3, and the hinge shaft is vertically arranged. The manual horizontal screw jack 33 is equipped with a stop lock 34. A manual horizontal screw jack 33 with a stop lock 34 can be selected. The stop lock 34 can lock the state of the manual horizontal screw jack 33, thereby stabilizing the angle of the support frame 2.

[0029] The adjustment assembly includes three manual vertical screw jacks 35. The working platform 4 includes a first side and a second side, with two vertical screw jacks positioned close to the first side and corresponding to both ends of the first side, and another manual vertical screw jack 35 positioned close to the second side and corresponding to the middle of the second side. The housings of the manual vertical screw jacks 35 are mounted on a mounting bracket 3. The output ends of the vertical screw jacks are hinged to the working platform 4, and the hinge shafts of the vertical screw jacks are arranged along the spanwise direction of the wing. When adjusting the pitch angle of the working platform 4, since the first side is closer to the outer wing box than the second side, the extension and retraction of the output shafts of the two vertical screw jacks on the first side are controlled.

[0030] like Figure 5 and Figure 6As shown, the working platform 4 is provided with a sliding plate 41, and the sliding direction of the sliding plate 41 is set along the spanwise direction of the wing. The clamping plate assembly 5 includes a plurality of leading edge clamping plates 51 installed on the sliding plate 41. The leading edge clamping plates 51 are provided with a groove 53 structure that matches the shape of the leading edge of the wing. The plurality of leading edge clamping plates 51 are arranged sequentially along the sliding direction of the sliding plate 41. The leading edge clamping plates 51 are provided with hooks 52 for fixing the leading edge of the wing to the leading edge clamping plates 51.

[0031] Specifically, the sliding structure of the sliding plate 41 is as follows: two slide rails are provided on the working platform 4 along the spanwise direction of the wing, and a slider is provided on the slide rail. The sliding plate 41 is fixed on the slider. Vertical push plates 42 are provided at both ends of the sliding plate 41. The working platform 4 is provided with side vertical plates 43 located opposite to the two push plates 42. The vertical plates 43 are provided with threaded connecting tightening bolts 44. The tightening bolts 44 are used to abut against the push plates 42. The position of the sliding plate 41 can be adjusted and fixed by rotating the tightening bolts 44.

[0032] The leading edge clamping plate 51 has measuring plates 54 fixed above and below the groove 53, corresponding to the upper and lower surfaces of the wing leading edge. One end of the measuring plate 54 maintains a preset gap with the leading edge fixed on the clamping plate, and the other end of the measuring plate 54 is used to extend to the upper and lower surfaces of the outer wing box when docking the leading edge and the wing box. The measuring plate 54 has chord percentage markings 55. The deviation between the wing leading edge and the outer wing box is determined according to the chord percentage markings 55 and the corresponding chord percentage markings on the upper and lower surfaces of the outer wing box. The measuring plate 54 has front spar markings 56. The deviation between the leading edge wing box is determined according to the distance between the front spar markings 56 and the front spar plane on the outer wing box.

[0033] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A multi-degree-of-freedom mounting device for the leading edge of a wing, characterized in that, It includes a base (1), a support frame (2), a mounting frame (3), a work platform (4), and a pallet assembly (5); The support frame (2) is slidably mounted on the base (1). The support frame (2) slides along the heading direction of the wing. The base (1) is provided with a limiting component for limiting the position of the support frame (2) on the base (1). The mounting frame (3) is rotatably mounted on the support frame (2). The pivot of the mounting frame (3) is set in the vertical direction. The support frame (2) is provided with a rotation drive component (31) for driving the mounting frame (3) to rotate. The working platform (4) is mounted on the mounting frame (3) through an adjustment component. The adjustment component is used to adjust the height and pitch angle of the working platform (4). The clamping plate component (5) is slidably mounted on one side of the working platform (4). The clamping plate component (5) is used to fix the leading edge component of the wing. The clamping plate component (5) slides along the spanwise direction of the wing. The base (1) is provided with two parallel guide rail pairs (16), and the support frame (2) and the slider of the guide rail pairs (16) are fixedly connected; a base plate (21) is provided between the two guide rail pairs (16), the base plate (21) and the base (1) are relatively stationary, and two opposing fixing plates (22) are provided on the base plate (21); The support frame (2) is provided with a connecting rod (23), the connecting rod (23) is provided with a mounting plate (24), and a top plate (25) is rotatably mounted on the mounting plate (24). The rotation axis of the top plate (25) and the mounting plate (24) is higher than the height of the fixed plate (22). The top plate (25) includes a first state and a second state. When the top plate (25) is in the first state, the bottom of the top plate (25) is located between the two fixed plates (22). When the top plate (25) is in the second state, the bottom edge of the top plate (25) is higher than the fixed plate (22). An adjusting screw (26) is threaded onto the fixing plate (22). The adjusting screw (26) passes through the fixing plate (22). The length direction of the adjusting screw (26) is set along the length direction of the guide rail pair (16). The adjusting screw (26) is used to abut against the top plate (25) in the first state.

2. The multi-degree-of-freedom mounting device for the leading edge of a wing according to claim 1, characterized in that, The support frame (2) is provided with multiple universal balls (32), the bottom surface of the mounting frame (3) is in contact with the universal balls (32), the rotary drive assembly (31) is a manual horizontal screw jack (33), the output end of the manual horizontal screw jack (33) is hinged to the mounting frame (3), and the hinge shaft is set vertically.

3. The multi-degree-of-freedom mounting device for the leading edge of a wing according to claim 2, characterized in that, The manual horizontal screw jack (33) is equipped with a stop lock (34).

4. The multi-degree-of-freedom mounting device for the leading edge of a wing according to claim 1, characterized in that, The adjustment assembly includes three manual vertical screw jacks (35). The working platform (4) includes a first side and a second side opposite to each other. Two vertical screw jacks are located near the first side and correspond to the two ends of the first side respectively. Another manual vertical screw jack (35) is located near the second side and corresponds to the middle of the second side. The housing of the manual vertical screw jack (35) is mounted on the mounting bracket (3). The output end of the vertical screw jack is hinged to the working platform (4). The hinge axis of the vertical screw jack is set along the spanwise direction of the wing.

5. The multi-degree-of-freedom mounting device for the leading edge of a wing according to claim 1, characterized in that, The working platform (4) is provided with a sliding plate (41), the sliding direction of the sliding plate (41) is perpendicular to the sliding direction of the support frame (2), the clamping plate assembly (5) includes multiple leading edge clamping plates (51) installed on the sliding plate (41), the leading edge clamping plates (51) are provided with a groove (53) structure that matches the shape of the leading edge of the wing, and the multiple leading edge clamping plates (51) are arranged sequentially along the sliding direction of the sliding plate (41); The leading edge clamp (51) is provided with a hook (52) for fixing the leading edge of the wing to the leading edge clamp (51).

6. The multi-degree-of-freedom mounting device for the leading edge of a wing according to claim 5, characterized in that, The leading edge plate (51) is fixedly provided with a measuring plate (54) corresponding to the upper and lower surfaces of the wing leading edge above and below the groove (53). One end of the measuring plate (54) and the leading edge fixed on the plate maintain a preset gap. The other end of the measuring plate (54) is used to extend to the upper and lower surfaces of the outer wing box when docking the leading edge and the wing box. The measuring plate (54) has chord percentage markings (55). The deviation between the leading edge of the wing and the outer wing box is determined according to the various percentage markings and the corresponding chord percentage markings (55) on the upper and lower surfaces of the outer wing box. The measuring plate (54) is provided with a front beam engraving (56). The deviation of the leading edge wing box is judged based on the distance between the front beam engraving (56) and the front beam plane on the outer wing box.

Images