Aircraft panel structure stringer overturning tool

Abstract

The utility model discloses an aircraft panel structure stringer overturning tool which comprises an overturning tool body, a first shaft body, a stringer body and placing frames, the placing frames are arranged at the two ends of the interior of the overturning tool body through the first shaft body and a second shaft body respectively, and six-dimensional force sensors are arranged on the first shaft body and the second shaft body respectively. The turnover tool comprises a turnover tool body, a plurality of containing frames are arranged on the turnover tool body, a stringer body is arranged between the containing frames, adjusting grooves are formed in the two sides of the lower portion of the turnover tool body correspondingly, lead screws are arranged in the adjusting grooves correspondingly, the lead screws are sleeved with driving blocks correspondingly, and balancing weights are arranged at the top ends of the driving blocks correspondingly. The turnover tool body, the stringer body, the placing frame, the first shaft body, the driving motor, the second shaft body, the six-dimensional force sensor, the adjusting groove, the lead screw, the servo motor, the driving block and the balancing weight are installed, the moment of force of the balancing weight to the turnover tool body can be changed by adjusting the horizontal position of the balancing weight, and the turnover tool body is kept balanced.

Description

Technical Field

[0001] This utility model relates to the field of flipping tooling technology, specifically a flipping tooling for an aircraft panel structure stringer. Background Technology

[0002] Aircraft panel structures typically consist of components such as skin, stringers, and bulkheads. The stringers are generally arranged longitudinally along the fuselage or wings of the aircraft. Their main function is to enhance the load-bearing capacity of the skin, withstand various loads generated during flight, and form an integral load-bearing structure with the skin to maintain the shape and strength of the aircraft panel, ensuring the safety and reliability of the aircraft structure.

[0003] Long stringers typically require various processing operations on their surface, such as drilling and riveting. Flipping fixtures can flip long stringers, allowing for multi-face processing to be completed in a single clamping, reducing repetitive positioning errors and facilitating worker operation. However, during the flipping process, the center of gravity of the long stringer changes. Due to the shift in the center of gravity, the flipping fixture may lose its balance, causing the long stringer to sway or even fall, affecting the safety and stability of the flipping operation. Summary of the Invention

[0004] The purpose of this invention is to provide a tooling for flipping the stringer of an aircraft panel structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a long stringer flipping fixture for an aircraft panel structure, comprising a flipping fixture body, a first shaft, a long stringer body, and a placement frame. Placement frames are respectively installed at both ends of the flipping fixture body via the first shaft and the second shaft. Six-dimensional force sensors are respectively installed on the first shaft and the second shaft. The long stringer body is positioned between the placement frames. A drive motor is fixed to the top of one side of the flipping fixture body, and the output end of the drive motor is connected to the first shaft. Adjustment grooves are provided on both sides below the flipping fixture body, and lead screws are installed inside each adjustment groove. Drive blocks are sleeved on each lead screw, and counterweights are installed at the top of each drive block. A servo motor is installed at one end of each adjustment groove, and the output end of each servo motor is connected to the lead screw.

[0006] Preferably, each of the counterweights has a locking block at its bottom end, and each of the drive blocks has a locking slot at its top that matches the locking block.

[0007] Preferably, two sets of brackets are provided on both sides inside the placement rack, and screws pass through each bracket, with limiters provided at the bottom of each screw.

[0008] Preferably, a fixed rod is provided at the top of one side of the placement rack, and two sets of movable sleeves are fitted on the fixed rod, with the bottom end of each movable sleeve connected to the bracket.

[0009] Preferably, each of the fixed rods has a strip-shaped hole on its top surface, and each of the movable sleeves is connected to the strip-shaped hole by a fastener.

[0010] Preferably, support cylinders are provided at both ends of both sides of the main body of the flipping fixture, and support rods are provided inside the support cylinders through rigid springs, with the top ends of the support rods connected to the main body of the flipping fixture.

[0011] Preferably, each of the support cylinders has a damping block at its bottom, and one end of each damping block is connected to a rigid spring.

[0012] Preferably, guide grooves are provided on both sides of the inside of the support cylinder, and guide blocks are provided on both sides of one end of the support rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This aircraft panel structure stringer flipping fixture is equipped with a flipping fixture body, a stringer body, a placement frame, a first shaft, a drive motor, a second shaft, a six-dimensional force sensor, an adjustment groove, a lead screw, a servo motor, a drive block, and a counterweight. The stringer body to be processed is placed and fixed in the placement frame. The drive motor drives the first shaft to rotate, thereby driving the placement frame and the stringer body to flip for processing. During flipping, the servo motor can drive the lead screw to rotate, causing the drive block to move along the lead screw, thereby adjusting the position of the counterweight. Six-dimensional force sensors on the first and second axes are used to measure the forces and torques on the first and second axes in real time and transmit them to the control system. The control system calculates the adjustment amount of the counterweight according to the imbalance, and then generates a reverse torque to balance the main body of the flipping fixture. By adjusting the horizontal position of the counterweight, the torque of the counterweight on the main body of the flipping fixture can be changed. According to the lever principle, appropriately increasing or decreasing the distance from the counterweight to the flipping center can make the torque generated by the counterweight cancel out the unbalanced torque generated by the change of the center of gravity of the main body of the stringer, thereby keeping the main body of the flipping fixture balanced. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a front view structural diagram of the present utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the adjusting groove of this utility model;

[0017] Figure 3 This is a top view of the placement rack of this utility model;

[0018] Figure 4 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of the support cylinder of this utility model.

[0020] In the diagram: 1. Main body of the flipping fixture; 2. First shaft; 3. Main body of the stringer; 4. Drive motor; 5. Support cylinder; 6. Adjustment groove; 7. Counterweight; 8. Placement rack; 9. Second shaft; 10. Lead screw; 11. Servo motor; 12. Drive block; 13. Locking block; 14. Locking slot; 15. Fixing rod; 16. Movable sleeve; 17. Strip hole; 18. Fastener; 19. Bracket; 20. Limiting component; 21. Screw; 22. Damping block; 23. Rigid spring; 24. Support rod; 25. Six-dimensional force sensor. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] Please see Figure 1-5 An embodiment of this utility model is provided: a long stringer flipping fixture for an aircraft panel structure, including a flipping fixture body 1, a first shaft 2, a long stringer body 3 and a placement frame 8. The two ends inside the flipping fixture body 1 are respectively provided with placement frames 8 through the first shaft 2 and the second shaft 9, and the long stringer body 3 is provided between the placement frames 8.

[0023] Two sets of brackets 19 are provided on both sides inside the placement rack 8, and screws 21 pass through each bracket 19. A limiter 20 is provided at the bottom of each screw 21.

[0024] A fixed rod 15 is provided at the top of one side of the placement rack 8. Two sets of movable sleeves 16 are fitted on the fixed rod 15. The bottom end of each movable sleeve 16 is connected to the bracket 19.

[0025] The top surface of the fixed rod 15 is provided with a strip hole 17, and the movable sleeve 16 is connected to the strip hole 17 by fasteners 18.

[0026] Place the main body 3 of the long stringer that needs to be processed into the placement frame 8, rotate the screw 21 to drive the limiting member 20 to move, thereby adjusting the limiting position of the main body 3 of the long stringer and fixing the main body 3 of the long stringer in the placement frame 8.

[0027] Meanwhile, the movable sleeve 16 can be connected to the strip hole 17 on the top surface of the fixed rod 15 through the fastener 18, so that the position of the bracket 19 can be adjusted by adjusting the position of the movable sleeve 16 on the strip hole 17 according to the specific size of the main body 3 of the stringer, thereby further improving the adaptability of fixing the main body 3 of the stringer.

[0028] A drive motor 4 is fixed to the top of one side of the main body 1 of the flipping fixture, and the output end of the drive motor 4 is connected to the first shaft 2.

[0029] After one side of the main body 3 of the stringer is processed, the drive motor 4 starts to drive the first shaft 2 to rotate. The rotation of the first shaft 2 will drive the placement frame 8 and the main body 3 of the stringer inside the placement frame 8 to flip, thereby realizing the flipping processing operation of the main body 3 of the stringer.

[0030] The main body 1 of the flipping fixture is provided with adjustment grooves 6 on both sides below, and each adjustment groove 6 is provided with a lead screw 10. Each lead screw 10 is fitted with a drive block 12, and each drive block 12 is provided with a counterweight 7 at its top.

[0031] Each end of the adjustment slot 6 is equipped with a servo motor 11, and the output end of each servo motor 11 is connected to the lead screw 10.

[0032] Six-dimensional force sensors 25 are respectively installed on the first shaft 2 and the second shaft 9. During the rotation of the main body 3 of the stringer, the six-dimensional force sensors 25 measure the force and torque in three directions on the first shaft 2 and the second shaft 9 in real time, and transmit the measured force and torque information to the control system.

[0033] After receiving the force and torque information transmitted by the six-dimensional force sensor 25, the control system determines whether the flipping fixture body 1 is balanced according to the preset balance conditions, such as the threshold range of force and torque in each direction. If it is determined that the flipping fixture body 1 is in an unbalanced state, the control system calculates the adjustment amount of the counterweight 7 according to the unbalanced state, that is, the direction and distance that the counterweight 7 needs to move in the horizontal direction.

[0034] The control system sends control commands to the servo motor 11. The output end of the servo motor 11 is connected to the lead screw 10. After the servo motor 11 starts, it drives the lead screw 10 to rotate. A drive block 12 is sleeved on the lead screw 10. The drive block 12 moves along the lead screw 10 under the action of the rotation of the lead screw 10. A counterweight 7 is set at the top of the drive block 12, thereby driving the counterweight 7 to move in the horizontal direction.

[0035] According to the lever principle, by changing the distance between the counterweight 7 and the center of rotation, the torque generated by the counterweight 7 is offset by the unbalanced torque generated by the change of the center of gravity of the main body 3 of the stringer, thereby keeping the main body 1 of the rotation fixture in balance.

[0036] During the movement and adjustment of the counterweight 7, the six-dimensional force sensor 25 continuously monitors the force and torque on the first shaft 2 and the second shaft 9 in real time, and feeds the new measurement information back to the control system. The control system judges again whether the flipping fixture body 1 has reached a balanced state based on the new measurement data. If it has not reached a balanced state, the above steps are repeated to continue adjusting the position of the counterweight 7 until the flipping fixture body 1 reaches a balanced state.

[0037] Each counterweight 7 has a locking block 13 at its bottom and a locking groove 14 at its top that matches the locking block 13, which facilitates the installation, disassembly and replacement of the counterweight 7.

[0038] Both ends of the main body 1 of the flipping fixture are provided with support cylinders 5, and the inside of each support cylinder 5 is provided with support rods 24 through rigid springs 23. The top of each support rod 24 is connected to the main body 1 of the flipping fixture.

[0039] When the main body 1 of the flipping fixture vibrates or is impacted by external forces during the flipping process, the support rod 24 compresses the rigid spring 23. The compression and extension of the rigid spring 23 absorbs and buffers some of the energy, reducing the impact of vibration on the main body 1 of the flipping fixture and the main body 3 of the stringer. This provides protection and prevents the main body 3 of the stringer from shifting position or affecting the machining accuracy due to vibration.

[0040] Damping blocks 22 are provided at the bottom of the support cylinder 5, and one end of each damping block 22 is connected to a rigid spring 23. The damping blocks 22 can consume vibration energy and further suppress the vibration of the rigid spring 23.

[0041] Guide grooves are provided on both sides inside the support cylinder 5, and guide blocks are provided on both sides of one end of the support rod 24. The guide grooves and guide blocks cooperate with each other to restrict the movement direction of the support rod 24, so that it can only move up and down along the direction of the guide groove, ensuring the accuracy and stability of the movement of the support rod 24, preventing the support rod 24 from deviating or shaking during the movement, thereby providing better stable support for the main body 1 of the flipping fixture.

[0042] The specific models and specifications of the drive motor 4, servo motor 11, and six-dimensional force sensor 25 need to be determined based on the specifications and parameters of the device. The selection and calculation method is existing technology, so it will not be described in detail here.

[0043] Working principle: In this embodiment, the main body 3 of the long stringer to be processed is placed in the placement frame 8. The two sets of brackets 19 on both sides inside the placement frame 8 can fix the main body 3 of the long stringer through screws 21 and limiting members 20. Specifically, the screws 21 are rotated to drive the limiting members 20 to move, thereby adjusting the limiting position of the main body 3 of the long stringer and fixing the main body 3 of the long stringer in the placement frame 8. At the same time, two sets of movable sleeves 16 are fitted on the fixing rod 15 at the top of one side of the placement frame 8. The bottom end of the movable sleeve 16 is connected to the bracket 19. The movable sleeve 16 can be connected to the slot 17 on the top surface of the fixing rod 15 through fasteners 18, so that the movable sleeve 16 can be adjusted according to the specific size of the main body 3 by adjusting the position of the movable sleeve 16 on the slot 17. The position of the bracket 19 is adjusted to further improve the adaptability of fixing the main body 3 of the stringer. The output end of the drive motor 4 is connected to the first shaft 2. After the drive motor 4 is started, it drives the first shaft 2 to rotate. Since the two ends of the flipping fixture body 1 are respectively provided with the placement frame 8 through the first shaft 2 and the second shaft 9, the rotation of the first shaft 2 will drive the placement frame 8 and the main body 3 of the stringer 3 inside the placement frame 8 to flip, thereby realizing the flipping processing operation of the main body 3 of the stringer. Six-dimensional force sensors 25 are respectively provided on the first shaft 2 and the second shaft 9. During the flipping process of the main body 3 of the stringer, the six-dimensional force sensors 25 measure the force and torque in three directions on the first shaft 2 and the second shaft 9 in real time, and transmit the measured data. The force and torque information is transmitted to the control system. After receiving the force and torque information transmitted by the six-dimensional force sensor 25, the control system determines whether the flipping fixture body 1 is balanced according to preset balance conditions, such as the threshold range of force and torque in each direction. If it is determined that the flipping fixture body 1 is unbalanced, the control system calculates the adjustment amount of the counterweight 7 according to the unbalance, that is, the direction and distance that the counterweight 7 needs to move in the horizontal direction. Then, the control system sends a control command to the servo motor 11. The output end of the servo motor 11 is connected to the lead screw 10. After the servo motor 11 starts, it drives the lead screw 10 to rotate. A drive block 12 is sleeved on the lead screw 10. The drive block 12 moves along the lead screw 10 under the action of the rotation of the lead screw 10. A counterweight 7 is set at the top, which drives the counterweight 7 to move in the horizontal direction. According to the lever principle, by changing the distance between the counterweight 7 and the flipping center, the torque generated by the counterweight 7 cancels out the unbalanced torque generated by the change of the center of gravity of the main body 3 of the stringer, thereby keeping the flipping fixture body 1 in balance. During the movement and adjustment of the counterweight 7, the six-dimensional force sensor 25 continuously monitors the force and torque on the first shaft 2 and the second shaft 9 in real time, and feeds the new measurement information back to the control system. The control system judges again whether the flipping fixture body 1 has reached the balance state based on the new measurement data. If it has not reached the balance state, the above steps are repeated to continue to adjust the position of the counterweight 7 until the flipping fixture body 1 reaches the balance state.

[0044] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0045] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0046] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0047] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flipping fixture for an aircraft panel structure stringer, characterized in that, The fixture includes a flipping fixture body (1), a first shaft (2), a long string body (3), and a placement frame (8). The two ends of the flipping fixture body (1) are respectively provided with a placement frame (8) through the first shaft (2) and the second shaft (9). A six-dimensional force sensor (25) is provided on the first shaft (2) and the second shaft (9). The long string body (3) is provided between the placement frames (8). A drive motor (4) is fixed at the top of one side of the flipping fixture body (1). The output end of the drive motor (4) is connected to the first shaft (2). Adjustment grooves (6) are provided on both sides below the flipping fixture body (1). A lead screw (10) is provided inside the adjustment groove (6). A drive block (12) is sleeved on the lead screw (10). A counterweight block (7) is provided at the top of the drive block (12). A servo motor (11) is provided at one end of the adjustment groove (6). The output end of the servo motor (11) is connected to the lead screw (10).

2. The aircraft panel structure stringer flipping fixture according to claim 1, characterized in that: Each counterweight (7) has a locking block (13) at its bottom end, and each drive block (12) has a locking slot (14) at its top that matches the locking block (13).

3. The aircraft panel structure stringer flipping fixture according to claim 1, characterized in that: The placement rack (8) has two sets of brackets (19) on both sides inside, and each bracket (19) has a screw (21) passing through it. The bottom end of each screw (21) is provided with a limiter (20).

4. The aircraft panel structure stringer flipping fixture according to claim 3, characterized in that: Each of the top sides of the placement rack (8) is provided with a fixed rod (15), and two sets of movable sleeves (16) are fitted on the fixed rod (15). The bottom ends of the movable sleeves (16) are connected to the bracket (19).

5. The aircraft panel structure stringer flipping fixture according to claim 4, characterized in that: The top surface of each fixed rod (15) is provided with a strip hole (17), and each movable sleeve (16) is connected to the strip hole (17) by a fastener (18).

6. The aircraft panel structure stringer flipping fixture according to claim 1, characterized in that: Both ends of the main body (1) of the flipping fixture are provided with support cylinders (5), and the inside of each support cylinder (5) is provided with support rods (24) through rigid springs (23). The top of each support rod (24) is connected to the main body (1) of the flipping fixture.

7. The aircraft panel structure stringer flipping fixture according to claim 6, characterized in that: Each of the support cylinders (5) has a damping block (22) at its bottom, and one end of each damping block (22) is connected to a rigid spring (23).

8. The aircraft panel structure stringer flipping fixture according to claim 6, characterized in that: The support cylinder (5) has guide grooves on both sides inside, and the support rod (24) has guide blocks on both sides at one end.

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