An Adaptive Micro-Adjustment Mechanism and Adjustment Method for an Aircraft Wing Box Section

Abstract

The present invention discloses an adaptive micro-adjustment mechanism and an adjustment method for an aircraft wing box section. This mechanism includes four sets of adjustment devices. Each set of devices, from top to bottom, is a tooling flag device, an adaptive docking device, a horizontal adjustment device, a force sensor device, a vertical adjustment device, and a column. Cross beams are used to connect the columns of each set of devices. Each set of adaptive docking devices is divided into two parts: a joint and a receiver. The joint is installed on the tooling flag device, and the receiver is installed on the horizontal adjustment device. Before the product is placed on the rack, the tooling flag device is installed on the product; when the product is placed on the rack, the receiver grabs the joint according to the actual position of the tooling flag device; after the product is placed on the rack, the force sensor device reads the stress states under different working conditions. Compared with traditional tooling, the entire system has a compact structure and reliable functions, can automatically adjust the positioning position according to the product state, reduce the internal stress generated during the assembly process, and improve the assembly efficiency.

Description

Technical Field

[0001] This application relates to the technical field of aircraft box section assembly and docking, and specifically to a mechanism and adjustment method for aircraft box section positioning and making adaptive micro-adjustments to compensate for minor shape changes of the product itself during docking. Technical Background

[0002] Most aircraft are composed of wings, fuselage, empennage, landing gear and power plant. Among them, the wing box of the aircraft is an important component, and its main function is to provide sufficient lift for the aircraft. Therefore, during the aircraft design process, it is inevitable to design it as a lightweight structural member to adapt to the influence of multi-directional airflows during flight. However, as a high-strength structural member, during the docking process of the wing and the central wing, problems such as out-of-tolerance of the outer edge of the box section and uneven seams often occur, directly affecting the overall delivery cycle and delivery quality of the aircraft; when docking large outer wing components of the aircraft, the attitude of the central wing directly affects the docking effect between the outer wing and the central wing. Therefore, the attitude adjustment and positioning of the central wing is an extremely important link during the docking of large outer wing components. After the central wing box section product is removed from the general assembly jig, local deformation caused by the release of internal stress is inevitable, and this deformation is concentrated in the course and wingspan directions. At the same time, due to the influence of internal and external factors such as the state of product parts, hole-making sequence, and temperature difference for each flight, the specific value of this deformation amount cannot be fully predicted, and can only be limited within a certain size.

[0003] The traditional central wing attitude adjustment and positioning mechanism adopts a method of separating positioning and attitude adjustment in terms of structure. After the attitude adjustment mechanism pre-positions the product, it manually adjusts the product by means of a mechanism composed of a lead screw and a slide rail. After the product enters the corresponding position of the positioning component, the product is fixed on the locator by using the method of locking with inserts and threaded positioning pins. There are problems such as cumbersome operation, difficult precise attitude adjustment, high cost, and uncontrollable assembly stress.

[0004] Therefore, during the aircraft production process, an adjustment mechanism and adjustment method that are modular, low-cost, simple in structure, convenient to use, have reconfigurable characteristics, and can make adaptive changes to small-scale shape changes of large components are needed. Summary of the Invention

[0005] To meet the requirements of aircraft production and development and overcome the problems existing in traditional tooling, this application provides a set of adaptive micro-adjustment mechanism and adjustment method. This mechanism has the function of automatic spatial adjustment, can quickly position during the product positioning process and automatically make micro-adjustments within a certain range according to the deformation situation of the product itself, and can simultaneously display the intersection displacement and force conditions during the positioning and docking of large product components in real time.

[0006] An adaptive micro-adjustment mechanism for an aircraft wing box section includes four sets of adjustment devices. The first adjustment device is a reference adjustment device, the second and third adjustment devices are one-way adjustment devices, and the fourth adjustment device is a free adjustment device. The first and fourth adjustment devices and the second and third adjustment devices are respectively arranged at the diagonals of a quadrilateral. Each set of adjustment device from top to bottom is a tooling flag device, an adaptive docking device, a horizontal adjustment device, a force sensor device, a vertical adjustment device, and a column. The four columns are fixed on the foundation, and crossbeams are used to connect between the columns. The vertical adjustment device is fixed on the upper surface of the column, and the main structure of the vertical adjustment device is covered with a dust cover to prevent powder from floating in during product hole making. The force sensor device is fixed on the upper surface of the vertical adjustment device, the horizontal adjustment device is arranged on the top of the force sensor device, the receiver below the adaptive docking device is adjustably connected to the horizontal adjustment device, and the joint above the adaptive docking device is connected to the tooling flag device. The product is connected to the adjustment mechanism through the tooling flag device. The vertical adjustment device adjusts the height of each tooling flag device, the horizontal adjustment device adjusts the position of the tooling flag device in the horizontal direction, and the force sensor device reads the pressures in the X, Y, and Z directions received by the joint when the product is placed on the shelf and docked.

[0007] The tooling flag device includes a tooling flag body, a lifting ring, and high-strength bolts. The tooling flag device body is a box-shaped part with a lifting ring provided at the top, connected to the product through high-strength bolts in the middle, and an installation hole for cooperating with the joint of the adaptive docking device is provided at the bottom.

[0008] The adaptive docking device includes a connector and a receiver. The connector contains a spherical positioning head, a clamping screw, a knurled lock, a lock nut, a circlip, a tapered washer, and a spherical washer. The spherical positioning head is connected and fixed to the bottom mounting hole of the tooling flag device. The receiver includes a cup cone, a rotary clamping device housing, a rotary clamping nut, a sponge washer, and a rotary clamping device stopper. One end of the cup cone is the receiving end, and the other end is the posture adjustment end. The receiving end cooperates with the connector, and the posture adjustment end is connected to the horizontal adjustment device. The contact part between the receiving end of the cup cone and the spherical positioning head is a conical surface, and the spherical positioning head can roll inside the receiving end of the cup cone. The rotary clamping device stopper is installed at the bottom of the cup cone, and the rotary clamping device housing, the rotary clamping nut, and the sponge washer are encapsulated inside the cup cone from top to bottom. The contact part between the rotary clamping nut and the rotary clamping device housing is a spherical structure. The clamping screw passes through the spherical positioning head and the rotary clamping device housing and is screwed to the rotary clamping nut, forming an integral structure that allows the connector to slide inside the conical surface of the receiving end of the cup cone. The outer shape structure of the spherical positioning head is divided into three parts: an external thread column, a precision cylinder, and a precision ball head. The end face of the precision ball head is a precision plane, and the plane radius is larger than the radius of the precision cylinder. The internal shape structure of the spherical positioning head is provided with a through hole for the clamping screw. The through hole is divided into two sections, and the radius of the lower through hole is larger than the radius of the upper section. The outer shape of the cup cone is divided into two parts. The upper part is the receiving end, with a cylindrical outer shape and a conical inner shape. The lower part is the posture adjustment end, with a stepped hole inner shape and a flange structure outer shape. The flange surface is provided with connection holes for the horizontal adjustment device. The flange structure is a circular fixed flange structure or a sliding flange structure. The fixed flange structure is circular, and the sliding flange structure is circular or rectangular.

[0009] The horizontal adjustment device on the first adjustment device includes a first support plate, a steady pin, a half-moon pressure plate, and a connecting bolt. The receiver is fixed to the first support plate through the steady pin. The first support plate is a flat part and is fixed to the upper surface of the force sensor device.

[0010] The horizontal adjustment devices on the second and third adjustment devices include a second support plate, a dust cover plate, a laser displacement sensor, an adjustment screw, and a connecting bolt. The second support plate is a flat part, and there is a sliding groove for the receiver at the center of its upper surface. There are 2 laser displacement sensor mounting notches on one side of the groove. The second support plate is fixed to the upper surface of the force sensor device.

[0011] The horizontal adjustment device of the fourth adjustment device includes a fourth support plate, a half-moon pressure plate, and a connecting bolt. The fourth support plate is a flat part, and there is a circular sliding groove for the receiver at the center of its upper surface. The fourth support plate is fixed to the upper surface of the force sensor device.

[0012] The force sensor device includes a force sensor, a transfer plate, and a connecting nut. The sensor is installed below the horizontal posture adjustment device and is connected through the connecting nut. It can measure the force in the XYZ three directions in real time and connect the horizontal adjustment device and the vertical adjustment device at the same time.

[0013] The vertical adjustment device includes a housing, a sleeve, a steel pipe assembly, and a motion device. The housing is a rectangular parallelepiped assembly welded by steel plates, with its bottom surface connected to the column and its upper surface connected to the sleeve. The sleeve serves as the channel for the up-and-down movement of the steel pipe. The steel pipe assembly is welded by a steel pipe and two bottom plates, with one end connected to the adapter plate of the force sensor device and the other end connected to the moving end of the lift in the motion device. The motion device drives the steel pipe assembly to move up and down within the sleeve. The motion device includes a lift, a handwheel, a stop pin, bearings, an encoder, and a display. The handwheel is connected to one side of the lift through bearings, and the outer ring of the handwheel is provided with an annular notch. The stop pin is stuck in the notch on the outer ring of the handwheel. The other side of the lift is connected to the encoder, and the encoder is connected to the display by wire. The moving end of the lift is connected to the lower surface of the steel pipe assembly, and the height of the receiver can be adjusted and displayed in real time through the handwheel.

[0014] The method of using this adaptive micro-adjustment mechanism for adjustment includes the following steps:

[0015] 1. Install the adapter of the adaptive docking device on the bottom mounting hole of the tooling flag device, tighten the lock nut, and snap the circlip at the notch of the clamping screw to prevent the clamping screw from falling off. The plain end of the clamping screw passes through the central through-hole of the adapter and successively passes through the spherical washer, conical washer, and knurled lock. The knurled lock restricts the movement range of the clamping screw inside the adapter to prevent the clamping screw from coming out.

[0016] 2. Connect the tooling flag device together with the adapter of the adaptive docking device to the product through high-strength bolts.

[0017] 3. Install the receivers of the four sets of adjustment devices to the theoretical positions, and zero the values of the encoder, force sensor, and laser displacement sensor.

[0018] 4. Lift the product directly above the adaptive micro-adjustment mechanism, roughly align the adapter of the adaptive docking device with the receiver, and slowly lower it. First, align the receivers of the first and fourth adjustment devices, and then finely adjust the receivers of the second and third adjustment devices according to the corresponding adapter positions. As the product slowly descends, after all the adapters are successfully in place, finely adjust the direction of the clamping screw inserted into the rotary clamping nut, and tighten the knurled lock after alignment to fix the adapter and the receiver together.

[0019] 5. Remove the hanging device and record the values of the force sensor device and the laser displacement sensor.

[0020] 6. Dock the product with another product and record the values of the force sensor device and the laser displacement sensor.

[0021] Beneficial effects: The present invention provides an adaptive micro-adjustment mechanism and adjustment method for an aircraft wing box section, which can automatically adjust the position of the receiver according to the deformation of the product itself, release the internal stress of the product itself, achieve rapid positioning, and quickly load and unload. The columns are relatively independent and can be arranged according to the shape of the product, with a high degree of modularization and can be reused repeatedly, greatly reducing costs. It solves the problem of poor general ability caused by the high customization degree of traditional tooling, saves time in traditional product positioning and manufacturing, improves the ability and efficiency of digital processing, and a set of systems can be used for the positioning and docking of multiple aircraft models and multiple components.

[0022] The following further describes the present application in detail with reference to the accompanying drawings and embodiments. Description of the drawings

[0023] Figure 1 It is a schematic diagram of the overall structure

[0024] Figure 2 It is a schematic diagram of a single adjustment device

[0025] Figure 3 It is a schematic diagram of a tooling flag device

[0026] Figure 4 It is a schematic diagram of the joint of the adaptive docking device

[0027] Figure 5 It is a schematic diagram of the receiver of the adaptive docking device of the first adjustment device

[0028] Figure 6 It is a schematic diagram of the receivers of the adaptive docking devices of the second and third adjustment devices

[0029] Figure 7 It is a schematic diagram of the receiver of the adaptive docking device of the fourth adjustment device

[0030] Figure 8 It is a schematic diagram of the horizontal adjustment device of the first adjustment device

[0031] Figure 9 It is a schematic diagram of the horizontal adjustment devices of the second and third adjustment devices

[0032] Figure 10 It is a schematic diagram of the horizontal adjustment device of the fourth adjustment device

[0033] Figure 11 It is a schematic diagram of the force sensor device

[0034] Figure 12 It is a schematic diagram of the vertical adjustment device

[0035] Description of the numbers in the figure: 1. First adjustment device; 2. Second adjustment device; 3. Third adjustment device; 4. Fourth adjustment device; 5. Tooling flag device; 6. Adaptive docking device; 7. Horizontal adjustment device; 8. Force sensor device; 9. Vertical adjustment device; 10. Column; 11. Cross beam; 12. Dust cover; 13. Product; 14. Tooling flag body; 15. Hoisting ring; 16. High-strength bolt; 17. Joint; 18. Receiver; 19. Spherical positioning head; 20. Clamping screw; 21. Locking nut; 22. Knurled lock; 23. Snap ring; 24. Tapered washer; 25. Spherical washer; 26. Rotating clamping device housing; 27. Rotating clamping nut; 28. Sponge washer; 29. Rotating clamping device stopper; 30. First adjustment device cup cone; 31. Second and third adjustment device cup cones; 32. Fourth adjustment device cup cone; 33. First support plate; 34. Connecting bolt; 35. Stabilizing pin; 36. Half-moon pressure plate; 37. Second support plate; 38. Dust cover plate; 39. Laser displacement sensor; 40. Adjusting screw; 41. Third support plate; 42. Force sensor; 43. Adapter plate; 44. Housing; 45. Sleeve; 46. Steel pipe assembly; 47. Motion device; 48. Lift; 49. Handwheel; 50. Stop pin; 51. Bearing; 52. Encoder; 53. Display. Detailed implementation

[0036] See attachment Figures 1-12 , an adaptive micro-adjustment mechanism for an aircraft wing box section, includes four sets of adjustment devices. The first adjustment device 1 is a reference adjustment device, the second adjustment device 2 and the third adjustment device 3 are single-direction adjustment devices, and the fourth adjustment device 4 is a free adjustment device. The first adjustment device 1 and the fourth adjustment device 4, and the second adjustment device 2 and the third adjustment device 3 are respectively arranged at the diagonals of a quadrilateral, as shown in Figure 1 . Each set of adjustment devices from top to bottom is a tooling flag device 5, an adaptive docking device 6, a horizontal adjustment device 7, a force sensor device 8, a vertical adjustment device 9 and a column 10. The column 10 of each set of adjustment devices is fixed on the foundation, and the columns are connected by a cross beam 11. The dust cover 12 is installed on the upper surface of the column 10 to cover the main part of the vertical adjustment device 9 to prevent powder from floating into the adjustment mechanism during product 13 hole making. The vertical adjustment device 9 is fixed on the upper surface of the column 10, the force sensor device 8 is fixed on the upper surface of the vertical adjustment device 9, the horizontal adjustment device 7 is arranged on the top of the force sensor device 8, the lower part of the adaptive docking device 6 is adjustably connected to the horizontal adjustment device 7, and the upper part of the adaptive docking device 6 is connected to the tooling flag device 5, as shown in Figure 2 . The product 13 is connected to the adjustment mechanism through the tooling flag device 5. The vertical adjustment device 9 adjusts the height of each tooling flag device 5, the horizontal adjustment device 7 adjusts the position of the tooling flag device 5 in the horizontal direction, and the force sensor device 8 reads the pressures in the X, Y, and Z directions received by the joint when the product 13 is placed on the rack and docked.

[0037] The tooling flag device 5 includes a tooling flag body 14, a lifting ring 15, and high-strength bolts 16. The body of the tooling flag device 5 is a box-shaped part with a lifting ring 15 provided at the top. In the middle, it is connected to the product 13 through high-strength bolts 16, and an installation hole for connecting to the adaptive docking device 6 is provided at the bottom. It can make a unified extension of different features of the product 13's outer shape and then be respectively connected to the adaptive docking device 6. See Figure 3 .

[0038] The adaptive docking device 6 includes two parts: a joint 17 and a receiver 18.

[0039] The joint 17 is composed of a spherical positioning head 19, a clamping screw 20, a locking nut 21, a knurled lock 22, a circlip 23, a conical washer 24, and a spherical washer 25. The outer shape structure of the spherical positioning head 19 is divided into three parts: an external thread column, a precision cylinder, and a precision ball head. The end face of the precision ball head is a precision plane, and the plane radius is larger than the radius of the precision cylinder. The internal shape structure of the spherical positioning head 19 is provided with a through-hole for the clamping screw 20. The through-hole is divided into two sections, and the radius of the lower through-hole is larger than that of the upper section. The precision cylinder part of the spherical positioning head 19 is connected to the hole axis of the bottom installation hole of the tooling flag device 5 and fixed using the locking nut 21. The circlip 23 is stuck at the notch of the clamping screw 20 to prevent the clamping screw 20 from falling off. The smooth rod end of the clamping screw 20 passes upward through the central through-hole of the spherical positioning head 19, and after passing through, it successively passes through the spherical washer 25, the conical washer 24, and the knurled lock 22. The knurled lock 22 restricts the movement range of the clamping screw 20 inside the joint 17 to prevent the clamping screw 20 from coming out. The contact part between the spherical positioning head 19 and the receiver 18 is a spherical surface, and there is a gap between the clamping screw 20 and the spherical positioning head 19. This structure allows the clamping screw 20 to swing inside the spherical positioning head 19 to compensate for the torsional deformation of the product 13 at this place. See Figure 4 .

[0040] The receiver 18 is composed of a cup cone, a rotary clamping device housing 26, a rotary clamping nut 27, a sponge washer 28, and a rotary clamping device stopper 29. The rotary clamping device stopper 29 is installed at the bottom of the cup cone, and the rotary clamping device housing 26, the rotary clamping nut 27, and the sponge washer 28 are sequentially encapsulated inside the cup cone from top to bottom. The contact part between the rotary clamping nut 27 and the rotary clamping device housing 26 is a spherical surface structure. The clamping screw 20 passes through the spherical positioning head 19 and the rotary clamping device housing 26 and is screwed to the rotary clamping nut 27. The rotary clamping nut 27 can rotate slightly along the inner wall of the rotary clamping housing 26 to compensate for the torsional deformation of the product at this place. See Figure 5。The cup cone is divided into upper and lower parts. The upper part is the receiving end, with a cylindrical outer shape and a conical inner shape, connected to the joint 17. The spherical positioning head 19 can roll inside the receiving end of the cup cone. The lower part is the attitude adjustment end, with a stepped hole inside and a flange structure outside, connected to the horizontal adjustment device 7. The flange structure is a circular fixed flange structure or a sliding flange structure.

[0041] The cup cone can be divided into the following three types according to the flange structure form of the lower part:

[0042] 1. The cup cone 30 of the first adjustment device, with a circular flange and two refined holes provided for fixing the cup cone on the horizontal adjustment device 7 as the positioning reference of the whole set of adjustment mechanisms, see Figure 5 ;

[0043] 2. The cup cones 31 of the second and third adjustment devices, with a rectangular flange, can slide unidirectionally on the horizontal adjustment device 7, and absorb the deformation of the product along the length direction in the spanwise and course directions respectively, see Figure 6 ;

[0044] 3. The cup cone 32 of the fourth adjustment device, with a circular flange, can slide freely on the horizontal adjustment device 7, and absorb the deformation of the product in multiple directions in the horizontal plane at the same time, see Figure 7 .

[0045] The horizontal adjustment device 7 can be divided into the following three types according to the flange structure form of the lower part of the cup cone:

[0046] 1. The horizontal adjustment device of the first adjustment device, which includes the first support plate 33, connecting bolts 34, steady pins 35 and semi-moon pressing plates 36. The first support plate 33 is a flat part, and the first support plate 33 is connected to the force sensor device 8 through the connecting bolts 34. The cup cone 30 of the first adjustment device is fixed on the first support plate 33 through the steady pins 35 as the positioning reference of the whole set of adjustment mechanisms, see Figure 8 ;,

[0047] 2. The horizontal adjustment devices of the second and third adjustment devices, which include the second support plate 37, dust-proof cover plate 38, laser displacement sensor 39, adjustment screws 40 and connecting bolts 34. The second support plate 37 is a flat part, with a sliding groove for the receiver 18 provided at the center position of its upper surface, and 2 laser displacement sensor 39 installation notches are provided on one side of the groove. The second support plate 37 is fixed on the force sensor device 8 through the connecting bolts 34. It allows the intersection point of the product to slide in the XY two directions respectively, and at the same time, the position of the cup cones 31 of the second and third adjustment devices can be adjusted by the adjustment screws 40 in the direction perpendicular to the sliding, and the laser displacement sensor 39 reads the specific adjustment amount, see Figure 9 ;

[0048] 3. The fourth adjustment device, i.e., the horizontal adjustment device, includes a third support plate 41, a connecting bolt 34, and a half-moon pressure plate 36. The fourth support plate 41 is a flat part, and a circular sliding groove of the receiver 18 is provided at the center of the upper surface. The fourth support plate 41 is fixed on the force sensor device 8 through the connecting bolt 34. The cup cone 32 of the fourth adjustment device can slide freely in the groove of the third support plate 41 and absorb deformations in multiple directions of the product, as shown in Figure 10 .

[0049] The force sensor device 8 includes a force sensor 42, an adapter plate 43, and a connecting nut 34. The force sensor 42 is installed below the horizontal adjustment device 7 through the connecting bolt 34 and is connected above the vertical adjustment device 9 through the adapter plate 43, and can measure the forces in three directions of the horizontal adjustment device 7 in real time, as shown in Figure 11 .

[0050] The vertical adjustment device 9 includes a housing 44, a sleeve 45, a steel pipe assembly 46, and a motion device 47, and can adjust and display the height position of the receiver 18 in real time. The housing 44 is a rectangular parallelepiped assembly welded by steel plates, the bottom surface is connected to the column 10, and the upper surface is connected to the sleeve 45. The sleeve 45 is a channel for the up and down movement of the steel pipe assembly 46. The steel pipe assembly 46 is welded by a steel pipe and two bottom plates, one end is connected to the adapter plate 43 of the force sensor device 8, and one end is connected to the motion device 47. The motion device 47 drives the steel pipe assembly 46 to move up and down in the sleeve 45. The motion device 47 includes a hoist 48, a handwheel 49, a stop pin 50, a bearing 51, an encoder 52, and a display 53. The handwheel 49 is connected to one side of the hoist 48 through the bearing 51. An annular notch is provided on the outer ring of the handwheel 49. The stop pin 50 is stuck in the notch on the outer ring of the handwheel 49. The other side of the hoist 48 is connected to the encoder 52. The encoder 52 is connected to the display 53 by wire. The movable end of the hoist 48 is connected to the lower surface of the steel pipe assembly 46, and the height of the receiver 18 can be adjusted and displayed in real time through the handwheel 49, as shown in Figure 12 .

[0051] The method for adjusting using this adaptive micro-adjustment mechanism includes the following steps:

[0052] 1. Install the adapter of the adaptive docking device 17 on the bottom mounting hole of the tooling flag device 5, tighten the locking nut 21, and snap the elastic retaining ring 23 into the notch of the clamping screw 20 to prevent the clamping screw 20 from falling off. The smooth rod end of the clamping screw 20 passes through the central through hole of the adapter 17, and successively passes through the spherical washer 25, the conical washer 24, and the knurled lock 22. The knurled lock 22 limits the movement range of the clamping screw 20 inside the adapter 17 to prevent the clamping screw 20 from coming out;

[0053] 2. Connect the tooling flag device 5 together with the adapter of the adaptive docking device 17 to the product 13 through the high-strength bolt 16;

[0054] 3 Install four sets of adjustment device receivers 18 to the theoretical positions, and zero the values of the encoder 52, force sensor 42, and laser displacement sensor 39;

[0055] 4 Lift and move the product 13 directly above the adaptive micro-adjustment mechanism. Align the approximate positions of the adaptive docking device joint 17 and the receiver 18, and slowly lower it. First, align the receivers 18 of the first adjustment device 1 and the fourth adjustment device 4. Then, fine-tune the receivers 18 of the second adjustment device 2 and the third adjustment device 3 according to the positions of the corresponding joints 17. As the product slowly descends, after all the joints 17 are successfully in place, fine-tune the direction of the clamping screw 20 inserted into the rotating clamping nut 27. After alignment, tighten the knurled lock 22 to fixedly connect the joint 17 and the receiver 18 together;

[0056] 5 Remove the hanging device and record the values of the force sensor device 8 and the laser displacement sensor 39;

[0057] 6 Dock the product with another product and record the values of the force sensor device 8 and the laser displacement sensor 39.

Claims

1. An adaptive micro-adjustment mechanism for an aircraft wing box section, characterized in that It includes four sets of adjustment devices. The first adjustment device is a reference adjustment device, the second and third adjustment devices are one-way adjustment devices, and the fourth adjustment device is a free adjustment device. The first and fourth adjustment devices and the second and third adjustment devices are respectively arranged at the diagonals of a quadrilateral. Each set of adjustment devices from top to bottom is a tooling flag device, an adaptive docking device, a horizontal adjustment device, a force sensor device, a vertical adjustment device, and a column. The four columns are fixed on the foundation, and crossbeams are used to connect between the columns. The vertical adjustment device is fixed on the upper surface of the column, the force sensor device is fixed on the upper surface of the vertical adjustment device, the horizontal adjustment device is arranged on the top of the force sensor device, the receiver below the adaptive docking device is adjustably connected to the horizontal adjustment device, and the joint above the adaptive docking device is connected to the tooling flag device. The product is connected to the adjustment mechanism through the tooling flag device. The vertical adjustment device adjusts the height of each tooling flag device, the horizontal adjustment device adjusts the position of the tooling flag device in the horizontal direction, and the force sensor device reads the horizontal pressure received by the joint when the product is put on the shelf and docked. The adaptive docking device includes a joint and a receiver. The joint contains a spherical positioning head, a clamping screw, a locking nut, a knurled locking device, a circlip, a conical washer, and a spherical washer. The spherical positioning head is connected and fixed to the hole axis of the bottom mounting hole of the tooling flag device. The receiver includes a cup cone, a rotary clamping device housing, a rotary clamping nut, a sponge washer, and a rotary clamping device stopper. One end of the cup cone is the receiving end, and the other end is the posture adjustment end. The receiving end cooperates with the joint, and the posture adjustment end is connected to the horizontal adjustment device. The contact part between the receiving end of the cup cone and the spherical positioning head is a conical surface, and the spherical positioning head can roll inside the receiving end of the cup cone. The rotary clamping device stopper is installed at the bottom of the cup cone, and the rotary clamping device housing, the rotary clamping nut, and the sponge washer are sequentially encapsulated inside the cup cone from top to bottom. And the contact part between the rotary clamping nut and the rotary clamping device housing is a spherical structure. The clamping screw passes through the spherical positioning head and the rotary clamping device housing and is screwed to the rotary clamping nut. The formed overall structure enables the joint to slide inside the conical surface of the receiving end of the cup cone. The outer shape structure of the spherical positioning head is divided into an external thread column, a refined cylinder, and a refined spherical head. The end face of the refined spherical head is a refined plane, and the plane radius is larger than the radius of the refined cylinder. The internal shape structure of the spherical positioning head is provided with a through hole for the clamping screw. The through hole is divided into two sections, and the radius of the lower through hole is larger than that of the upper section. The outer shape of the cup cone is divided into two parts. The upper part is the receiving end, the outer shape is cylindrical, and the inner shape is a conical surface. The lower part is the posture adjustment end, the inner shape is a stepped hole, and the outer shape is a flange structure. The flange surface is provided with a connection hole for connecting to the horizontal adjustment device.

2. The adaptive micro-adjustment mechanism for an aircraft wing box section according to claim 1, characterized in that, The tooling flag device includes a tooling flag body, a lifting ring, and high-strength bolts. The tooling flag device body is a box-shaped part, with a lifting ring at the top, connected to the product through high-strength bolts in the middle, and a mounting hole for cooperating with the joint of the adaptive docking device at the bottom.

3. The adaptive micro-adjustment mechanism for an aircraft wing box section according to claim 1, characterized in that, The flange structure is a circular fixed flange structure or a sliding flange structure.

4. The adaptive micro-adjustment mechanism for an aircraft wing box section according to claim 3, characterized in that, The fixed flange structure is circular, and the sliding flange structure is circular or rectangular.

5. The adaptive micro-adjustment mechanism for an aircraft wing box section according to claim 1, characterized in that, The horizontal adjustment device on the first adjustment device includes a first support plate, a steady pin, and a half-moon pressure plate. The reference adjustment device receiver is fixed on the first support plate through the steady pin. The first support plate is a flat part and is fixed on the upper surface of the force sensor device.

6. The adaptive micro-adjustment mechanism for an aircraft wing box section according to claim 1, characterized in that, The horizontal adjustment device on the second and third adjustment devices includes a second support plate, a steady pin, a dust-proof cover plate, a laser displacement sensor, and an adjustment screw. The second support plate is a flat part, and there is a receiver sliding groove at the center position of its upper surface. There are 2 laser displacement sensor mounting notches on one side of the groove. The second support plate is fixed on the upper surface of the force sensor device.

7. The adaptive micro-adjustment mechanism for an aircraft wing box section according to claim 1, characterized in that, The horizontal adjustment device of the fourth adjustment device includes a fourth support plate and a half-moon pressure plate. The fourth support plate is a flat part, and there is a circular receiver sliding groove at the center of the upper surface. The fourth support plate is fixed on the upper surface of the force sensor device.

8. The adaptive micro-adjustment mechanism for an aircraft wing box section according to claim 1, characterized in that, The force sensor device includes a force sensor, a transfer plate, and a connecting nut. The force sensor is installed below the horizontal posture adjustment device and is connected by the connecting nut. It can measure the force in the XYZ three directions in real time and connect the horizontal adjustment device and the vertical adjustment device at the same time.

9. The adaptive micro-adjustment mechanism for an aircraft wing box section according to claim 1, characterized in that, The vertical adjustment device includes a housing, a sleeve, a steel pipe assembly, and a motion device. The housing is a rectangular parallelepiped assembly welded by steel plates, the bottom surface is connected to the column, and the upper surface is connected to the sleeve. The sleeve is the channel for the up and down movement of the steel pipe assembly. The steel pipe assembly is welded by a steel pipe and two bottom plates, one end is connected to the transfer plate of the force sensor device, and the other end is connected to the moving end of the lifting machine in the motion device. The motion device drives the steel pipe assembly to move up and down in the sleeve.

10. The adaptive micro-adjustment mechanism for an aircraft wing box section according to claim 9, characterized in that, The motion device includes a lifting machine, a handwheel, a stop pin, a bearing, an encoder, and a display. The handwheel is connected to one side of the lifting machine through a bearing. There is an annular notch on the outer ring of the handwheel. The stop pin is stuck in the notch on the outer ring of the handwheel. The other side of the lifting machine is connected to the encoder. The encoder is connected to the display by wire. The moving end of the lifting machine is connected to the lower surface of the steel pipe assembly. The height of the receiver can be adjusted and displayed in real time through the handwheel.

11. A method for adjustment using the adaptive micro-adjustment mechanism for an aircraft wing box section according to claim 1, characterized in that It includes the following steps: 11-1 Install the adaptive docking device joint on the bottom mounting hole of the tooling flag device, tighten the locking bolt, and snap the elastic retaining ring into the notch of the clamping screw to prevent the clamping screw from falling off. The smooth rod end of the clamping screw passes through the central through hole of the joint and passes through the spherical washer, conical washer, and knurled locking device in sequence. The knurled locking device limits the movement range of the clamping screw inside the joint to prevent the clamping screw from coming out; 11-2 Connect the tooling flag device together with the adaptive docking device joint to the product through high-strength bolts; 11-3 Install the four sets of adjustment device receivers to the theoretical positions, and zero the values of the encoder, force sensor, and laser displacement sensor; 11-4 Lift the product directly above the adaptive micro-adjustment mechanism. Align the approximate positions of the adaptive docking device joint and the receiver, and slowly lower it. First, align the receivers of the first and fourth adjustment devices, and then fine-tune the receivers of the second and third adjustment devices according to the corresponding joint positions. As the product slowly descends, after all the joints are successfully in place, fine-tune the direction of the clamping screw inserted into the rotary clamping nut, and tighten the knurled locking device after alignment to fix the joint and the receiver together; 11 - 5 Remove the hanging device and record the values of the force sensor device and the laser displacement sensor; 11 - 6 Dock the product with another product and record the values of the force sensor device and the laser displacement sensor.

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