Center wing box and fuselage pulsating type butt joint device suitable for civil aircraft

Abstract

The invention relates to a central wing box and fuselage pulsating type docking device suitable for a civil aircraft, and belongs to the field of aircraft production and manufacturing. Impulse type assembly of a civil aircraft central wing box product is achieved, and the assembly efficiency is greatly improved. And by adopting a plurality of groups of precise track systems, the quick transfer and precise positioning functions of the positioning fixture are realized, and the product hoisting frequency is obviously reduced. Meanwhile, various hydraulic power assisting devices are applied, so that the operation difficulty of the large frame is effectively reduced.

Description

Technical Field

[0001] This application relates to a pulsed docking device for the central wing box and fuselage of a civil aircraft, belonging to the field of aircraft manufacturing. Background Technology

[0002] The center wing box-fuselage docking point is a critical intersection of the aircraft's main load-bearing structures, responsible for transferring wing loads (lift, drag, bending moment) to the fuselage. Current mainstream solutions employ fixed, dedicated tooling. The assembly process involves positioning the fuselage structural section on the fixed tooling and then mechanically connecting it to the center wing box (bolts / joints). This approach is suitable for technologically mature narrow-body aircraft (such as the A320 and B737 series). It relies on multiple parallel production lines, sacrificing space efficiency for assembly speed.

[0003] Existing technologies suffer from low assembly efficiency, with tooling relying on manual adjustment and long single-connection cycles (typically requiring 5 to 6 days), making it difficult to match the rhythm requirements of pulsating production lines. Highly skilled workers comprise over 70% of the workforce, and connection time exceeds 8 hours per cycle. Space utilization is inefficient; fixed tooling occupies a large area of ​​factory space, and multiple production lines operating in parallel further exacerbate this waste, resulting in factory utilization rates of ≤40%. Frequent use of crane resources necessitates independent tooling for positioning, transfer, and disassembly, with lifting operations occurring ≥20 times per product. Ergonomics are poor; heavy tooling is cumbersome to operate, requiring high levels of manual positioning, easily leading to operator fatigue and accuracy fluctuations. Furthermore, there is a risk of stress concentration. Rigid tooling restricts structural freedom, easily introducing residual stress during assembly and exacerbating fatigue sensitivity around bolt holes. Summary of the Invention

[0004] Based on one aspect of this application, and considering the assembly requirements of the center wing box of a large civil aircraft, a pulse-type docking device suitable for the center wing box and fuselage of a civil aircraft is achieved through multi-technology integration and modular design, comprising:

[0005] The system comprises: 1. Multifunctional central wing box positioning frame; 2. Central floor beam and wing box short frame positioning system; 3. Side wall panel positioning frame; 4. High-precision track system; 5. Electric drive hoisting system; 6. Separable upper shell positioning frame; 7. Positioning clamping plate assembly; and 8. Safety protection system. It enables universal, pulsed assembly across multiple aircraft models, meeting the assembly speed requirements of large civil aircraft.

[0006] The multifunctional central wing box positioning frame 1 is positioned using a ball-and-bowl configuration between four wing box positioning joints and the positioning frame. This ball-and-bowl configuration guides the wing box as it enters the positioning position, facilitating loading and unloading. Simultaneously, the frame integrates front pressure floor, rear pressure floor, and side wall panel positioning mechanisms. A single docking system comprises three positioning frames, which are interchangeable, enabling pulsed assembly.

[0007] The multifunctional central wing box positioning frame 1 includes a main frame 1-1, a bowl-shaped guide structure 1-2, a rear pressure floor positioner 1-3, a front pressure floor positioner 1-4, a side wall panel positioner 1-5, a positioning bracket guide rail groove 1-6, and a positioning guide rail groove 1-7.

[0008] The main frame 1-1 is made of high-strength steel, which can ensure that the deformation is less than 0.12mm when it is subjected to a maximum weight of 5.5 tons. It is used to support the structural weight of the central wing box, side wall panels, pressure floor and other structures.

[0009] There are a total of 4 bowl-shaped guide structures 1-2, which achieve self-guiding positioning through ball-bowl cooperation, increasing the contact area by 30%. The bowl-shaped guide structures 1-2 are connected to the main frame 1-1.

[0010] The rear pressure floor positioner 1-3 is designed with a lifting knob. The position of the pressure floor is ensured by lifting the knob. The lifting knob is precisely adjusted. The rear pressure floor positioner 1-3 is located on the rear side of the multi-functional central wing box positioning frame 1 and is connected to the main frame 1-1.

[0011] The front pressure floor positioner 1-4 is rotatable and rotates to the working position after being mounted on the frame. The front pressure floor positioner 1-4 is located on the front side of the multi-functional central wing box positioning frame 1 and is connected to the main frame 1-1.

[0012] Each of the side wall panel positioners 1-5 has one set on the left and one on the right, which adopts V-groove dual-degree-of-freedom YZ direction positioning and is connected to the main frame 1-1;

[0013] The positioning bracket guide rail grooves 1-6 are V-shaped and cooperate with the inverted V-shaped guide rail of the bracket transfer track system 4-1. They are used for the multi-functional central wing box positioning frame 1 to move on the guide rail. There are a total of 4 positioning bracket guide rail grooves 1-6 on the multi-functional central wing box positioning frame 1.

[0014] The positioning guide groove 1-7 adopts a ball bearing system, which cooperates with the circular bracket positioning rail 4-2 to provide bracket load and control the bracket YZ direction.

[0015] The central floor beam and wing box short frame positioning system 2 are connected to the overall frame and located above the multifunctional central wing box positioning frame of structure 1. The main design employs a track-sliding mechanism, allowing movement along both the X and Z directions. A separation device is designed between the positioning main frame and the track support, and this separation device also has a positioning function. The lifting system uses a hydraulic lifting system, significantly reducing manual operation.

[0016] The central floor beam and wing box short frame positioning system 2 includes a positioning main frame 2-1, a fixed I-shaped track 2-2, a wing box short frame positioning device 2-3, a frame and slide rail separation device 2-4, and a central floor beam positioning frame lifting device 2-5.

[0017] The positioning main frame 2-1 integrates the wing box short frame positioning device 2-3 and the central floor beam positioning frame lifting device 2-5, and is equipped with a footboard for the operator to work on the footboard without affecting the normal operation below the footboard; the positioning main frame 2-1 is designed with an I-shaped guide rail coupler, which can move along the X direction in conjunction with the fixed I-shaped rail 2-2, with a positioning accuracy of ±0.1mm, and is also designed with a positioning stop device, which has a precise positioning function;

[0018] The fixed I-shaped rail 2-2 consists of two rails, which are used to support the positioning main frame 2-1. At the same time, a positioning structure is designed on the rail to position the main frame 2-1 and ensure the position of the positioning main frame 2-1 in the X direction. It is connected to the positioning main frame 2-1 through an I-shaped rail coupler.

[0019] The wing box short frame positioning device 2-3 adopts a hydraulic lifting design, is symmetrically distributed on the left and right, reduces the operating force by 70%, and is connected to the positioning main frame 2-1.

[0020] The frame and slide rail separation device 2-4 adopts a rotary pressing method. After separation, the positioning main frame 2-1 can move along the fixed I-shaped track 2-2 to realize the rapid switching between the frame and the track. It is connected to the positioning main frame 2-1 and can extend and retract in the Y direction.

[0021] The central floor beam positioning frame lifting device 2-5 is distributed in four places around the positioning main frame 2-1. The four-point distributed hydraulic lifting can effectively reduce the difficulty of operation. One side of the lifting device is connected to the positioning main frame 2-1, and the other side is connected to the wing box short frame positioning device 2-3.

[0022] The side panel positioning frame 3 includes a positioning plate 3-1, a plate displacement driver 3-2, and a side panel skin ear hole locator 3-3, which are used to position the left and right side panel products. Each side is composed of 3 positioning plates 3-1 that can move along the Y direction, and are symmetrical from left to right.

[0023] The positioning plate 3-1 is divided into 6 small plates, each driven to move independently. The positioning plate 3-1 integrates multiple sets of positioners for positioning the side wall panel skin. The positioning plate 3-1 is connected to the main frame 2-1 through the plate displacement driver 3-2.

[0024] There are six displacement actuators 3-2 in total, which are integrated on the positioning card plate 3-1 and connected to the main frame 2-1 on the other side. They adopt the rotation motion of the lead screw and the ball screw servo drive, with a positioning repeatability of ±0.05mm.

[0025] The side panel skin ear hole locator 3-3 is connected to the main frame 1-1.

[0026] The high-precision track system 4 includes a transfer track system frame 4-1, a multi-functional central wing box positioning frame transfer track system 4-2, a circular bracket positioning track 4-3, and a track bearing conversion device 4-4. It adopts a dual-track collaborative design, with each set containing two V-shaped tracks to cooperate with the multi-functional central wing box positioning frame 1 for station transfer. It also contains 6 circular tracks, 3 on each side, forming the three positions for the central wing box assembly, used to cooperate with the multi-functional central wing box positioning frame 1 for positioning in the working position.

[0027] The transfer track system frame 4-1 consists of a multi-functional central wing box positioning frame transfer track system 4-2 and a circular bracket positioning track 4-3;

[0028] The multi-functional central wing box positioning frame transfer track system 4-2 consists of two tracks, which adopt V-shaped guide rails. One side of the track contacts the positioning bracket guide rail groove 1-6 to realize the rapid displacement of the multi-functional central wing box positioning frame 1.

[0029] The circular bracket positioning track 4-3 contacts the ball bearing track on the positioning guide groove 1-7, which can realize micron-level positioning of the bracket in the Y and Z directions;

[0030] The track load conversion device 4-4 is connected to the main frame 1-1 on the top and to the transfer track system frame 4-1 on the bottom. It is used to convert the multifunctional central wing box positioning frame 1 from a V-shaped track to a circular track, seamlessly switching the load transfer between the V-shaped track and the circular track.

[0031] The electrically driven hoisting system 5 can operate synchronously, with movements in the Y and Z directions. The application of this system significantly reduces the space occupied by factory cranes and improves overall assembly efficiency.

[0032] The electric hoisting system 5 includes a hoisting system frame 5-1 and an electric hoist hoisting system 5-2;

[0033] The hoisting system frame 5-1 is used to bear the weight of the multi-functional central wing box positioning frame 1 and the product weight, and is fixedly connected to the transfer track system frame 4-1.

[0034] The electric hoist hoisting system 5-2 is connected to the hoisting system frame 5-1. It is electrically driven and controlled by a servo motor, supporting synchronous displacement in the Y / Z directions. It can achieve multi-component functionality, hoisting both side wall panels and front and rear pressure wall panels. It achieves multi-component compatibility. The four electric hoist hoisting systems 5-2 are integrated on the hoisting system frame 5-1 and are used for deburring the front pressure floor, rear pressure floor, and side wall panels.

[0035] The split upper shell positioning frame 6 features dual-frame collaborative positioning. An integrated positioning plate for the upper shell ensures that each fixture comprises two frames. Utilizing a track system, the frames can move along the X-axis and Z-axis to meet product loading and unloading space requirements. The frames include open / close position locators to ensure the movable frames meet product positioning needs.

[0036] The split upper shell positioning frame 6 includes a frame base 6-1, an upper positioning plate mounting frame 6-2, and a transmission mechanism 6-3.

[0037] The frame base 6-1 has a high-strength base integrated guide rail and stopper, which can ensure that the frame can be opened and closed by a single person when installed on the upper positioning plate mounting frame 6-2;

[0038] The upper positioning plate mounting frame 6-2, together with the frame base 6-1, realizes X-direction movement. Three guide rails are designed on the upper positioning plate mounting frame 6-2, and Z-direction movement is realized through the transmission mechanism 6-3.

[0039] The transmission mechanism 6-3 applies driving force on one side, which can transmit the force to the other side, so that the entire split upper shell positioning frame 6 moves synchronously along the Z direction. The frame base 6-1 and the upper positioning plate mounting frame 6-2 are connected by the transmission mechanism 6-3.

[0040] The positioning plate group 7 is installed on the upper positioning plate mounting frame 6-2. It can achieve Z-axis linkage with the upper positioning plate mounting frame 6-2 through the transmission mechanism 6-3. Each side consists of 3 independent plates, with a total of 2 sets in the front and back. The plates are designed with skin ear hole locators, skin inner surface, etc. to ensure the positioning position of the upper shell.

[0041] The safety protection system 8 is installed on the split upper shell positioning frame 6. The operator can walk along the guardrail to the top. The left and right sides of the guardrail are circular passageway guardrails to prevent the risk of personnel falling. The guardrail design meets the personnel safety requirements.

[0042] The assembly method for the pulsed docking device between the center wing box and fuselage of a civil aircraft involves the following steps: pre-mounting preparations are performed at track 1; the front and rear pressure plates, side panels, and center floor beams are installed at track 2; and the wing box is docked with the upper shell at track 3. After track 3 is completed, the bracket is transferred to track 1 for cyclic assembly.

[0043] There are three stations. Station 1 completes the mounting of the wing box and the installation of the titanium frame, relying on the bowl-shaped guide structure 1-2 and the circular bracket positioning track 4-3. Station 2 completes the assembly of the floor beam / short frame / wall panel, relying on the positioning main frame 2-1, the wing box short frame positioning device 2-3, the card plate displacement driver 3-2 and the electric hoist hoisting system 5-2. Station 3 completes the precision docking of the wing box and the upper shell, relying on the transmission mechanism 6-3 and the safety protection system 8.

[0044] After station 3 is completed, the bracket returns to station 1 via track (4-1), forming a closed-loop pulsed production line, improving the controllability of the cycle by 90%.

[0045] In position 1, the central wing box is positioned using the bowl-shaped guide structure 1-2, and the multi-functional central wing box positioning frame 1 is locked to the circular bracket positioning rail 4-3 via the positioning guide rail groove 1-7. During this stage, titanium plate inspection, wing box joint installation, and titanium frame installation are performed.

[0046] In station 2, the multi-functional central wing box positioning frame 1 is transferred to station 2 via the multi-functional central wing box positioning frame transfer track system 4-2, and locked at station 2 via the positioning guide rail groove 1-7. After the positioning main frame 2-1 and wing box short frame positioning device 2-3 are moved to the open position via the wing box short frame positioning device 2-3 and the frame and slide rail separation device 2-4, the central floor beam and wing box short frame are mounted. The positioning main frame 2-1 and wing box short frame positioning device 2-3 are then moved to the installation position via the wing box short frame positioning device 2-3 and the frame and slide rail separation device 2-4, and the positioning main frame 2-1 is slid to the assembly position via the fixed I-beam track 2-2. The side is positioned using the side wall panel positioner 1-5. The middle-front pressure floor and middle-rear pressure floor are positioned using the rear pressure floor positioner 1-3 and the front pressure floor positioner 1-4. The positioning plate 3-1 is moved to the open position by the plate displacement actuator 3-2. After the side is mounted, the positioning plate 3-1 is pushed back and locked by the plate displacement actuator 3-2. After drilling, the wall panel and pressure floor are hoisted to the deburring position by the electric hoist hoisting system 5-2. After the deburring is completed, the product is hoisted back for subsequent assembly.

[0047] This application has the following beneficial effects:

[0048] 1. This application achieves pulsed assembly of the central wing box product for civil aircraft, significantly improving assembly efficiency. By employing multiple precision track systems, it realizes rapid transfer and precise positioning of the positioning frame, significantly reducing the number of product hoisting operations. Simultaneously, the application of various hydraulic assist devices effectively reduces the operational difficulty of large frames. A three-station closed-loop design (mounting → component assembly → fuselage docking) enables the cyclical flow of the bracket through high-precision tracks, with a controllable cycle time error ≤5 seconds. A large-curvature bowl-shaped structure + spherical joint improves the positioning tolerance to ±1.5°, accommodating component assembly deformation. I-beam guide rails with X-axis sliding + hydraulic lifting for Z-axis attitude adjustment achieve a positioning accuracy of 0.1mm / 0.05°. An independent drive plate supports 6-DOF attitude adjustment, adapting to skin surface tolerances of ±0.5mm. Multiple electric hoists are used for servo-coordinated control, with a displacement synchronization error ≤0.5mm, replacing traditional overhead crane operations. The system deeply integrates precision mechanics (ball bearing guides), hydraulic control (lifting system), and electrical automation (servo drive), achieving a system MTBF (Mean Time Between Failures) of >5000 hours.

[0049] 2. This application innovatively integrates hydraulic system, track technology, automation technology and electrification technology, reflecting the advanced design concept and technical level in China, and reducing system complexity by 50%.

[0050] 3. This application achieves multi-functional integration with minimal factory space, reducing the floor area by 60%.

[0051] 4. Replacing manual operation with hydraulic power assistance and electric drive reduces the workload of workers by 70%.

[0052] 5. Enables pulsed, rhythmic production, shortening the assembly cycle by 45%. Breaks through the technological bottleneck of aircraft final assembly, providing fundamental support for increasing the production capacity of domestically produced large aircraft. Attached Figure Description

[0053] Figure 1 This is a front view of a pulsed docking device for the center wing box and fuselage of a civil aircraft.

[0054] Figure 2 for Figure 1 A partial view of section AA in the middle.

[0055] Figure 3 for Figure 1 A partial view of the BB section.

[0056] Figure 4 This is a left view of a pulsed docking device for the center wing box and fuselage of a civil aircraft.

[0057] Figure 5 The front view of the multifunctional central wing box positioning frame 1.

[0058] Figure 6Side view of the multi-functional central wing box positioning frame 1.

[0059] Figure 7 Position the main view of the main frame 2-1.

[0060] Figure 8 The side view for positioning the main frame 2-1.

[0061] Figure 9 The front view of the side wall panel positioning frame 3.

[0062] Figure 10 Side view of the positioning frame 3 for the side wall panel.

[0063] Figure 11 Front view of high-precision orbital system 4

[0064] Figure 12 This is a top view of the high-precision orbital system 4.

[0065] Figure 13 This is the front view of the electric-driven hoisting system 5.

[0066] Figure 14 This is a side view of the electric hoisting system 5.

[0067] Figure 15 This is the front view of the split upper shell positioning frame 6.

[0068] Figure 16 This is a side view of the split upper shell positioning frame 6.

[0069] Figure 17 This is a schematic diagram of the positioning card group 7.

[0070] Figure 18 This is the main view of security protection system 8.

[0071] Figure 19 This is a side view of the safety protection system 8.

[0072] Figure 20 This is designed to be applicable to the working process of the pulsed docking device between the central wing box and the fuselage of a civil aircraft.

[0073] Among them, 1. Multifunctional central wing box positioning frame, 2. Central floor beam and wing box short frame positioning system, 3. Side wall panel positioning frame, 4. High-precision track system, 5. Electric drive hoisting system, 6. Separable upper shell positioning frame, 7. Positioning card plate group, 8. Safety protection system, 1-1 Main frame, 1-2 Bowl-shaped guide structure, 1-3 Rear pressure floor positioner, 1-4 Front pressure floor positioner, 1-5 Side wall panel positioner, 1-6 Positioning bracket guide rail groove, 1-7 Positioning guide rail groove, 2-1 Positioning main frame, 2-2 Fixed I-beam track, 2-3 1. Wing box short frame positioning device; 2.4 Frame and slide rail separation device; 2.5 Central floor beam positioning frame lifting device; 3.1 Positioning plate; 3.2 Plate displacement driver; 3.3 Side wall panel skin ear hole locator; 4.1 Transfer track system frame; 4.2 Multifunctional central wing box positioning frame transfer track system; 4.3 Circular bracket positioning track; 4.4 Track load conversion device; 5.1 Lifting system frame; 5.2 Electric hoist lifting system; 6.1 Frame base; 6.2 Upper positioning plate mounting frame; 6.3 Transmission mechanism. Detailed Implementation

[0074] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0075] Example 1

[0076] A pulsed docking device for the center wing box and fuselage of a civil aircraft, comprising:

[0077] The system comprises: 1. Multifunctional central wing box positioning frame; 2. Central floor beam and wing box short frame positioning system; 3. Side wall panel positioning frame; 4. High-precision track system; 5. Electric drive hoisting system; 6. Separable upper shell positioning frame; 7. Positioning clamping plate assembly; and 8. Safety protection system. It enables universal, pulsed assembly across multiple aircraft models, meeting the assembly speed requirements of large civil aircraft.

[0078] The multifunctional central wing box positioning frame 1 is positioned using a ball-and-bowl configuration between four wing box positioning joints and the positioning frame. This ball-and-bowl configuration guides the wing box as it enters the positioning position, facilitating loading and unloading. Simultaneously, the frame integrates front pressure floor, rear pressure floor, and side wall panel positioning mechanisms. A single docking system comprises three positioning frames, which are interchangeable, enabling pulsed assembly.

[0079] The multifunctional central wing box positioning frame 1 includes a main frame 1-1, a bowl-shaped guide structure 1-2, a rear pressure floor positioner 1-3, a front pressure floor positioner 1-4, a side wall panel positioner 1-5, a positioning bracket guide rail groove 1-6, and a positioning guide rail groove 1-7.

[0080] The main frame 1-1 is made of high-strength steel, which can ensure that the deformation is less than 0.12mm when it is subjected to a maximum weight of 5.5 tons. It is used to support the structural weight of the central wing box, side wall panels, pressure floor and other structures.

[0081] There are a total of 4 bowl-shaped guide structures 1-2, which achieve self-guiding positioning through ball-bowl cooperation, increasing the contact area by 30%. The bowl-shaped guide structures 1-2 are connected to the main frame 1-1.

[0082] The rear pressure floor positioner 1-3 is designed with a lifting knob. The position of the pressure floor is ensured by lifting the knob. The lifting knob is precisely adjusted. The rear pressure floor positioner 1-3 is located on the rear side of the multi-functional central wing box positioning frame 1 and is connected to the main frame 1-1.

[0083] The front pressure floor positioner 1-4 is rotatable and rotates to the working position after being mounted on the frame. The front pressure floor positioner 1-4 is located on the front side of the multi-functional central wing box positioning frame 1 and is connected to the main frame 1-1.

[0084] Each of the side wall panel positioners 1-5 has one set on the left and one on the right, which adopts V-groove dual-degree-of-freedom YZ direction positioning and is connected to the main frame 1-1;

[0085] The positioning bracket guide rail grooves 1-6 are V-shaped and cooperate with the inverted V-shaped guide rails of the multi-functional central wing box positioning frame transfer track system 4-2. They are used for the multi-functional central wing box positioning frame 1 to move on the guide rails. There are a total of 4 positioning bracket guide rail grooves 1-6 on the multi-functional central wing box positioning frame 1.

[0086] The positioning guide groove 1-7 adopts a ball bearing system, which cooperates with the circular bracket positioning rail 4-2 to provide bracket load and control the bracket YZ direction.

[0087] The central floor beam and wing box short frame positioning system 2 are connected to the overall frame and located above the multifunctional central wing box positioning frame of structure 1. The main design employs a track-sliding mechanism, allowing movement along both the X and Z directions. A separation device is designed between the positioning main frame and the track support, and this separation device also has a positioning function. The lifting system uses a hydraulic lifting system, significantly reducing manual operation.

[0088] The central floor beam and wing box short frame positioning system 2 includes a positioning main frame 2-1, a fixed I-shaped track 2-2, a wing box short frame positioning device 2-3, a frame and slide rail separation device 2-4, and a central floor beam positioning frame lifting device 2-5.

[0089] The positioning main frame 2-1 integrates the wing box short frame positioning device 2-3 and the central floor beam positioning frame lifting device 2-5, and is equipped with a footboard for the operator to work on the footboard without affecting the normal operation below the footboard; the positioning main frame 2-1 is designed with an I-shaped guide rail coupler, which can move along the X direction in conjunction with the fixed I-shaped rail 2-2, with a positioning accuracy of ±0.1mm, and is also designed with a positioning stop device, which has a precise positioning function;

[0090] The fixed I-shaped rail 2-2 consists of two rails, which are used to support the positioning main frame 2-1. At the same time, a positioning structure is designed on the rail to position the main frame 2-1 and ensure the position of the positioning main frame 2-1 in the X direction. It is connected to the positioning main frame 2-1 through an I-shaped rail coupler.

[0091] The wing box short frame positioning device 2-3 adopts a hydraulic lifting design, is symmetrically distributed on the left and right, reduces the operating force by 70%, and is connected to the positioning main frame 2-1.

[0092] The frame and slide rail separation device 2-4 adopts a rotary pressing method. After separation, the positioning main frame 2-1 can move along the fixed I-shaped track 2-2 to realize the rapid switching between the frame and the track. It is connected to the positioning main frame 2-1 and can extend and retract in the Y direction.

[0093] The central floor beam positioning frame lifting device 2-5 is distributed in four places around the positioning main frame 2-1. The four-point distributed hydraulic lifting can effectively reduce the difficulty of operation. One side of the lifting device is connected to the positioning main frame 2-1, and the other side is connected to the wing box short frame positioning device 2-3.

[0094] The side panel positioning frame 3 includes a positioning plate 3-1, a plate displacement driver 3-2, and a side panel skin ear hole locator 3-3, which are used to position the left and right side panel products. Each side is composed of 3 positioning plates 3-1 that can move along the Y direction, and are symmetrical from left to right.

[0095] The positioning plate 3-1 is divided into 6 small plates, each driven to move independently. The positioning plate 3-1 integrates multiple sets of positioners for positioning the side wall panel skin. The positioning plate 3-1 is connected to the main frame 2-1 through the plate displacement driver 3-2.

[0096] There are six displacement actuators 3-2 in total, which are integrated on the positioning card plate 3-1 and connected to the main frame 2-1 on the other side. They adopt the rotation motion of the lead screw and the ball screw servo drive, with a positioning repeatability of ±0.05mm.

[0097] The side panel skin ear hole locator 3-3 is connected to the main frame 1-1.

[0098] The high-precision track system 4 includes a transfer track system frame 4-1, a multi-functional central wing box positioning frame transfer track system 4-2, a circular bracket positioning track 4-3, and a track bearing conversion device 4-4. It adopts a dual-track collaborative design, with each set containing two V-shaped tracks to cooperate with the multi-functional central wing box positioning frame 1 for station transfer. It also contains 6 circular tracks, 3 on each side, forming the three positions for the central wing box assembly, used to cooperate with the multi-functional central wing box positioning frame 1 for positioning in the working position.

[0099] The transfer track system frame 4-1 consists of a multi-functional central wing box positioning frame transfer track system 4-2 and a circular bracket positioning track 4-3;

[0100] The multi-functional central wing box positioning frame transfer track system 4-2 consists of two tracks, which adopt V-shaped guide rails. One side of the track contacts the positioning bracket guide rail groove 1-6 to realize the rapid displacement of the multi-functional central wing box positioning frame 1.

[0101] The circular bracket positioning track 4-3 contacts the ball bearing track on the positioning guide groove 1-7, which can realize micron-level positioning of the bracket in the Y and Z directions;

[0102] The track load conversion device 4-4 is connected to the main frame 1-1 on the top and to the transfer track system frame 4-1 on the bottom. It is used to convert the multifunctional central wing box positioning frame 1 from a V-shaped track to a circular track, seamlessly switching the load transfer between the V-shaped track and the circular track.

[0103] The electrically driven hoisting system 5 can operate synchronously, with movements in the Y and Z directions. The application of this system significantly reduces the space occupied by factory cranes and improves overall assembly efficiency.

[0104] The electric hoisting system 5 includes a hoisting system frame 5-1 and an electric hoist hoisting system 5-2;

[0105] The hoisting system frame 5-1 is used to bear the weight of the multi-functional central wing box positioning frame 1 and the product weight, and is fixedly connected to the transfer track system frame 4-1.

[0106] The electric hoist hoisting system 5-2 is connected to the hoisting system frame 5-1. It is electrically driven and controlled by a servo motor, supporting synchronous displacement in the Y / Z directions. It can achieve multi-component functionality, hoisting both side wall panels and front and rear pressure wall panels. It achieves multi-component compatibility. The four electric hoist hoisting systems 5-2 are integrated on the hoisting system frame 5-1 and are used for deburring the front pressure floor, rear pressure floor, and side wall panels.

[0107] The split upper shell positioning frame 6 features dual-frame collaborative positioning. An integrated positioning plate for the upper shell ensures that each fixture comprises two frames. Utilizing a track system, the frames can move along the X-axis and Z-axis to meet product loading and unloading space requirements. The frames include open / close position locators to ensure the movable frames meet product positioning needs.

[0108] The split upper shell positioning frame 6 includes a frame base 6-1, an upper positioning plate mounting frame 6-2, and a transmission mechanism 6-3.

[0109] The frame base 6-1 has a high-strength base integrated guide rail and stopper, which can ensure that the frame can be opened and closed by a single person when installed on the upper positioning plate mounting frame 6-2;

[0110] The upper positioning plate mounting frame 6-2, together with the frame base 6-1, realizes X-direction movement. Three guide rails are designed on the upper positioning plate mounting frame 6-2, and Z-direction movement is realized through the transmission mechanism 6-3.

[0111] The transmission mechanism 6-3 applies driving force on one side, which can transmit the force to the other side, so that the entire split upper shell positioning frame 6 moves synchronously along the Z direction. The frame base 6-1 and the upper positioning plate mounting frame 6-2 are connected by the transmission mechanism 6-3.

[0112] The positioning plate group 7 is installed on the upper positioning plate mounting frame 6-2. It can achieve Z-axis linkage with the upper positioning plate mounting frame 6-2 through the transmission mechanism 6-3. Each side consists of 3 independent plates, with a total of 2 sets in the front and back. The plates are designed with skin ear hole locators, skin inner surface, etc. to ensure the positioning position of the upper shell.

[0113] The safety protection system 8 is installed on the split upper shell positioning frame 6. The operator can walk along the guardrail to the top. The left and right sides of the guardrail are circular passageway guardrails to prevent the risk of personnel falling. The guardrail design meets the personnel safety requirements.

[0114] The assembly method for the pulsed docking device between the center wing box and fuselage of a civil aircraft involves the following steps: pre-mounting preparations are performed at track 1; the front and rear pressure plates, side panels, and center floor beams are installed at track 2; and the wing box is docked with the upper shell at track 3. After track 3 is completed, the bracket is transferred to track 1 for cyclic assembly.

[0115] There are three stations. Station 1 completes the mounting of the wing box and the installation of the titanium frame, relying on the bowl-shaped guide structure 1-2 and the circular bracket positioning track 4-3. Station 2 completes the assembly of the floor beam / short frame / wall panel, relying on the positioning main frame 2-1, the wing box short frame positioning device 2-3, the card plate displacement driver 3-2 and the electric hoist hoisting system 5-2. Station 3 completes the precision docking of the wing box and the upper shell, relying on the transmission mechanism 6-3 and the safety protection system 8.

[0116] After station 3 is completed, the bracket returns to station 1 via track (4-1), forming a closed-loop pulsed production line, improving the controllability of the cycle by 90%.

[0117] In position 1, the central wing box is positioned using the bowl-shaped guide structure 1-2, and the multi-functional central wing box positioning frame 1 is locked to the circular bracket positioning rail 4-3 via the positioning guide rail groove 1-7. During this stage, titanium plate inspection, wing box joint installation, and titanium frame installation are performed.

[0118] In station 2, the multi-functional central wing box positioning frame 1 is transferred to station 2 via the multi-functional central wing box positioning frame transfer track system 4-2, and locked at station 2 via the positioning guide rail groove 1-7. After the positioning main frame 2-1 and wing box short frame positioning device 2-3 are moved to the open position via the wing box short frame positioning device 2-3 and the frame and slide rail separation device 2-4, the central floor beam and wing box short frame are mounted. The positioning main frame 2-1 and wing box short frame positioning device 2-3 are then moved to the installation position via the wing box short frame positioning device 2-3 and the frame and slide rail separation device 2-4, and the positioning main frame 2-1 is slid to the assembly position via the fixed I-beam track 2-2. The side is positioned using the side wall panel positioner 1-5. The middle-front pressure floor and middle-rear pressure floor are positioned using the rear pressure floor positioner 1-3 and the front pressure floor positioner 1-4. The positioning plate 3-1 is moved to the open position by the plate displacement actuator 3-2. After the side is mounted, the positioning plate 3-1 is pushed back and locked by the plate displacement actuator 3-2. After drilling, the wall panel and pressure floor are hoisted to the deburring position by the electric hoist hoisting system 5-2. After the deburring is completed, the product is hoisted back for subsequent assembly.

[0119] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any modifications or substitutions made by those skilled in the art within the scope of the technology disclosed in this application should be covered 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 pulsed docking device for the center wing box and fuselage of a civil aircraft, characterized in that, It includes a multi-functional central wing box positioning frame (1), a central floor beam and wing box short frame positioning system (2), a side wall panel positioning frame (3), a high-precision track system (4), an electric drive hoisting system (5), a split upper shell positioning frame (6), a positioning card plate group (7), and a safety protection system (8).

2. The pulsed docking device for the center wing box and fuselage of a civil aircraft according to claim 1, characterized in that, The multifunctional central wing box positioning frame (1) includes a main frame (1-1), a bowl-shaped guide structure (1-2), a rear pressure floor positioner (1-3), a front pressure floor positioner (1-4), a side wall panel positioner (1-5), a positioning bracket guide rail groove (1-6), and a positioning guide rail groove (1-7). The main frame (1-1) is made of high-strength steel, which can ensure that the deformation is less than 0.12mm when it bears a maximum weight of 5.5 tons. It is used to support the structural weight of the central wing box, side wall panels, pressure floor, etc. There are a total of 4 bowl-shaped guide structures (1-2), which achieve self-guiding positioning through ball-bowl cooperation, increasing the contact area by 30%. The bowl-shaped guide structures (1-2) are connected to the main frame (1-1). The rear pressure floor positioner (1-3) is designed with a lifting knob. The position of the pressure floor is ensured by lifting the knob. The lifting knob is precisely adjusted. The rear pressure floor positioner (1-3) is located on the rear side of the multi-functional central wing box positioning frame (1) and is connected to the main frame (1-1). The front pressure floor positioner (1-4) is rotatable and rotates to the working position after being mounted on the frame. The front pressure floor positioner (1-4) is located on the front side of the multi-functional central wing box positioning frame (1) and is connected to the main frame (1-1). Each of the side wall panel positioners 1-5 is a set on the left and right sides, and adopts V-groove dual-degree-of-freedom YZ direction positioning, and is connected to the main frame (1-1); The positioning bracket guide rail groove (1-6) is V-shaped and cooperates with the inverted V-shaped guide rail of the multi-functional central wing box positioning frame transfer track system (4-2) for the multi-functional central wing box positioning frame (1) to move on the guide rail. There are a total of 4 positioning bracket guide rail grooves (1-6) on the multi-functional central wing box positioning frame (1). The positioning guide groove (1-7) adopts a ball bearing system, which cooperates with the circular bracket positioning rail 4-2 to provide bracket load and control the bracket YZ direction.

3. The pulsed docking device for the center wing box and fuselage of a civil aircraft according to claim 2, characterized in that, The central floor beam and wing box short frame positioning system (2) includes a positioning main frame (2-1), a fixed I-beam track (2-2), a wing box short frame positioning device (2-3), a frame and slide rail separation device (2-4), and a central floor beam positioning frame lifting device (2-5). The positioning main frame (2-1) integrates the wing box short frame positioning device (2-3) and the central floor beam positioning frame lifting device (2-5), and is equipped with a footboard for the operator to work on the footboard without affecting the normal operation below the footboard; the positioning main frame (2-1) is designed with an I-shaped guide rail coupler, which can move along the X direction in conjunction with the fixed I-shaped rail (2-2) with a positioning accuracy of ±0.1mm. At the same time, a positioning stop device is designed, which has a precise positioning function; The fixed I-shaped rail (2-2) consists of two rails, which are used to support the positioning main frame (2-1). At the same time, a positioning structure is designed on the rail to position the main frame (2-1) and ensure the position of the positioning main frame (2-1) in the X direction. It is connected to the positioning main frame (2-1) through an I-shaped rail coupler. The wing box short frame positioning device (2-3) adopts a hydraulic lifting design, is symmetrically distributed on the left and right, reduces the operating force by 70%, and is connected to the positioning main frame (2-1); The frame and slide rail separation device (2-4) adopts a rotary pressing method. After separation, the positioning main frame (2-1) can move along the fixed I-shaped track (2-2) to realize the rapid switching between the frame and the track. It is connected to the positioning main frame (2-1) and can extend and retract in the Y direction. The central floor beam positioning frame lifting device (2-5) is distributed in four places around the positioning main frame (2-1). The four-point distributed hydraulic lifting can effectively reduce the difficulty of operation. One side of the lifting device is connected to the positioning main frame (2-1), and the other side is connected to the wing box short frame positioning device (2-3).

4. The pulsed docking device for the center wing box and fuselage of a civil aircraft according to claim 3, characterized in that, The side panel positioning frame (3) includes a positioning plate (3-1), a plate displacement driver (3-2), and a side panel skin ear hole locator (3-3), which are used to position the left and right side panel products. Each side is composed of 3 positioning plates (3-1) that can move along the Y direction, and are symmetrical on the left and right. The positioning plate (3-1) is divided into 6 small plates, each driven to move independently. The positioning plate (3-1) integrates multiple sets of positioners for positioning the side wall panel skin. The positioning plate (3-1) is connected to the main frame 2-1 through the plate displacement driver (3-2). There are 6 displacement actuators (3-2) in total, which are integrated on the positioning plate (3-1) and connected to the main frame 2-1 on the other side. They adopt the rotation motion of the lead screw and the ball screw servo drive, with a positioning repeatability of ±0.05mm. The side panel skin ear hole locator (3-3) is connected to the main frame (1-1).

5. The pulsed docking device for the center wing box and fuselage of a civil aircraft according to claim 4, characterized in that, The high-precision track system (4) includes a transfer track system frame (4-1), a multi-functional central wing box positioning frame transfer track system (4-2), a circular bracket positioning track (4-3), and a track bearing conversion device (4-4). It adopts a dual-track collaborative design. Each set contains two V-shaped tracks to cooperate with the multi-functional central wing box positioning frame (1) for station transfer. It contains 6 circular tracks, 3 on each side, forming three positions for the central wing box assembly, which are used to cooperate with the multi-functional central wing box positioning frame (1) for positioning in the working position. The transfer track system frame (4-1) consists of a multi-functional central wing box positioning frame transfer track system (4-2) and a circular bracket positioning track (4-3); The multifunctional central wing box positioning frame transfer track system (4-2) consists of two tracks, which adopt V-shaped guide rails. One side of the track contacts the positioning bracket guide rail groove (1-6) to realize the rapid displacement of the multifunctional central wing box positioning frame (1). The circular bracket positioning track (4-3) contacts the ball bearing track on the positioning guide groove (1-7), which can realize micron-level positioning of the bracket in the Y and Z directions; The track load conversion device (4-4) is connected to the main frame (1-1) on the top and to the transfer track system frame (4-1) on the bottom. It is used to convert the multifunctional central wing box positioning frame (1) from V-shaped track to circular track, seamlessly switching the load transfer between V-shaped track and circular track.

6. The pulsed docking device for the center wing box and fuselage of a civil aircraft according to claim 5, characterized in that, The electric hoisting system (5) includes a hoisting system frame (5-1) and an electric hoist hoisting system (5-2). The hoisting system frame (5-1) is used to bear the weight of the multi-functional central wing box positioning frame (1) and the product weight, and is fixedly connected to the transfer track system frame (4-1). The electric hoist hoisting system (5-2) is connected to the hoisting system frame (5-1). The drive mode is electric drive, servo motor control, and supports synchronous displacement in the Y / Z directions. It can realize the universal function of multiple components, and can hoist both side wall panels and front and rear pressure wall panels. It achieves multi-component compatibility. The four electric hoist hoisting systems (5-2) are integrated on the hoisting system frame (5-1) and are used for deburring the front pressure floor, rear pressure floor, and side wall panels.

7. The pulsed docking device for the center wing box and fuselage of a civil aircraft according to claim 6, characterized in that, The split upper shell positioning frame (6) includes a frame base (6-1), an upper positioning plate mounting frame (6-2), and a transmission mechanism (6-3). The frame base (6-1) has a high-strength base integrated guide rail and stopper, which can ensure that the frame can be opened and closed by a single person when installed on the upper positioning plate mounting frame (6-2). The upper positioning plate mounting frame (6-2) works with the frame base (6-1) to achieve X-axis movement. Three guide rails are designed on the upper positioning plate mounting frame (6-2) to achieve Z-axis movement through the transmission mechanism. The transmission mechanism (6-3) applies driving force on one side, which can transmit the force to the other side, so that the entire split upper shell positioning frame (6) moves synchronously along the Z direction. The frame base (6-1) and the upper positioning plate mounting frame (6-2) are connected through the transmission mechanism (6-3).

8. The pulsed docking device for the center wing box and fuselage of a civil aircraft according to claim 7, characterized in that, The positioning plate group (7) is installed on the upper positioning plate mounting frame (6-2). It can achieve Z-axis linkage with the upper positioning plate mounting frame (6-2) through the transmission mechanism (6-3). Each side consists of 3 independent plates, with a total of 2 sets in the front and back. The plates are designed with skin ear hole locators, skin inner surface, etc. to ensure the positioning position of the upper shell.

9. The pulsed docking device for the center wing box and fuselage of a civil aircraft according to claim 8, characterized in that, The safety protection system (8) is installed on the split upper shell positioning frame (6). The operator can walk along the guardrail to the top. The left and right sides of the guardrail are ring-shaped channel guardrails to prevent the risk of personnel falling. The guardrail design meets the personnel safety requirements.

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