Assembly tool for composite sandwich beams

Abstract

The present application belongs to the technical field of composite material assembly tooling, and relates to a kind of assembly tooling of composite material sleeve beam.The present application can realize the assembly of multiple secondary parts-composite material sleeve beam forming composite material sleeve beam;The present application innovatively proposes a metal joint structure, which replaces the commonly used metal hinge arm, and simplifies the metal joint with drilling and connection, shape compensation based on the metal hinge arm.The metal joint is matched with high-precision bolts and nuts, realizing the connection function after drilling the metal joint, and ensuring the accurate connection of the metal joint and the composite material sleeve beam.Gap shims can be added between the metal joint and the composite material sleeve beam to achieve process requirements such as thermal alignment.The present application can flexibly realize the assembly of composite material sleeve beams with various axial size changes without disassembling and installing tooling parts, greatly shortening the development cycle of composite material sleeve beams.

Description

Technical Field

[0001] This invention belongs to the field of composite material assembly tooling technology, and relates to an assembly tooling for composite material fitting beams. Background Technology

[0002] Composite rudder box sections are typically connected to the aircraft fuselage structure via metal hinged arms. There are two main assembly methods for the metal hinged arms and composite beams: one is a series assembly where the composite beams are located on both sides of the metal hinged arm (usually two beams); the other is a nested assembly where the metal hinged arm is fitted onto a single composite beam or a composite composite nested beam (formed by nesting multiple secondary components / composite beams). Regardless of the method, the metal hinged arm is bolted to the net dimensional surfaces of the composite beam, such as the flange and web surfaces, to ensure that the relative position of the metal hinged arm and the composite beam remains fixed. If the composite material rudder box section experiences positional shift or surface deformation during the secondary co-bonding autoclave molding process, the corresponding metal hinge arm will deviate from its theoretical position. In other words, the axial position of the metal hinge arm will deviate from its theoretical position. When the composite material rudder box section is transferred to the downstream assembly workshop, it will be impossible to connect it to the aircraft fuselage structure using the metal hinge arm. Since the metal hinge arm is already bolted to the composite material beam, its assembly position cannot be adjusted, which could lead to the scrapping of the composite material rudder box section.

[0003] Currently, conventional assembly fixtures only have assembly functions. Taking the assembly scheme of composite material sleeve beams as an example, conventional assembly fixtures are designed and assembled according to the theoretical positions of the composite material sleeve beams. For example, positioning parts of the assembly fixture are designed based on the theoretical positions of the two end faces of the composite material sleeve beam, and the assembly of the composite material sleeve beam with theoretical dimensions is completed based on the positioning parts. However, the composite material curing process is an extremely complex coupling process of time, temperature, and pressure. Taking the composite material sleeve beam as an example, during the secondary co-bonding process of the composite material rudder box section in the autoclave, the composite material sleeve beam will experience axial expansion or contraction. That is, the axial dimension of the composite material sleeve beam will change during the secondary co-bonding process in the autoclave. This requires technicians to make corrections based on the amount of change in the axial dimension of the composite material sleeve beam, i.e., process requirements. The corresponding assembly fixture should have the assembly capability for multiple axial dimensions of composite material sleeve beams, and the assembly fixture designed based on theoretical assembly dimensions obviously cannot meet the process requirements. Currently, conventional assembly fixtures only have assembly functions and cannot accurately and effectively control the axial dimension of composite material sleeve beams based on process requirements.

[0004] To address the above problems, this invention focuses on the assembly of composite material nested beams and creatively proposes an assembly fixture for these beams. This fixture uses metal joints instead of the metal hinge structures commonly used in beam assembly structures. The metal joints provide assembly and surface compensation functions, and can meet assembly requirements based on downstream assembly references. This assembly fixture has the capability to assemble multiple secondary components—composite material beams—to form a composite material nested beam. The axial dimension of the assembled composite material nested beam varies considerably from the theoretical axial dimension (-5-5mm), with an assembly accuracy of 0.01mm. Summary of the Invention

[0005] The purpose of this invention is to develop an assembly fixture for composite material fitting beams. The designed metal joint has functions such as assembly and surface compensation, and can realize the assembly requirements based on downstream assembly reference transfer. It can realize the assembly of multiple secondary components - composite material beams fitting together to form composite material fitting beams. Moreover, it can flexibly realize the assembly of composite material fitting beams with various axial dimension changes without disassembling or installing tooling accessories, which greatly shortens the development cycle of composite material fitting beams.

[0006] The technical solution of the present invention is as follows:

[0007] The assembly tooling for composite material fitting beams includes a metal joint, a positioning part of the assembly tooling, and a fitting assembly part.

[0008] The overall structure of the assembly tooling is as follows Figure 3 , Figure 4 As shown, the components include a metal joint, a drilling bushing, a working surface on the flange side, a working surface on the web side, a detachable drill jig, high-precision bolts, nuts, a platform, a column, a clamping device support, a connecting assembly, a clamping device, a lateral clamping device, a connector, a support, a drill jig back plate, a fixing sleeve, a flange outer surface clamping plate, an L-shaped support, an adjustable end of the beam end face, an end face action end, a dial indicator, a slotted lead screw, a handle nut, a T-key, a sleeve, a protrusion, a positioning pin, a gauge base, a fixed end of the beam end face, an end face action end, fitting assembly components, a drill jig, a connector, a drill jig back plate, an action platform, a spacer plate, a support plate, and a clamping device sleeve.

[0009] The structural schematic diagram of the metal joint is shown in Figure 2, which includes a drilling bushing, a working surface on the flange side, a working surface on the web side, a detachable drilling jig, high-precision bolts, and nuts.

[0010] The metal joint section is derived from the metal hinge arm in the composite rudder box segment used for docking with the aircraft fuselage structure. The metal hinge arm is simplified, retaining the central axis position of the intersection point and designing a through hole with a diameter of φ6mm-φ10mm centered on it. The metal joint section uses Invar steel, whose coefficient of thermal expansion is close to that of the composite composite beam.

[0011] To reduce the self-weight of the metal joint section, the driven shaft of the metal hinge arm and unnecessary structures are removed. The metal joint section mainly retains the working surface, reinforcing ribs, locating pin holes, and drilled bushings. The length of the working surface of the metal joint section along the axial direction of the composite material sleeve beam is designed to be 150-200mm. The working surface of the metal joint section on the web side of the composite material sleeve beam is offset by 2mm from its theoretical position towards the inner surface of the composite material sleeve beam, meaning there is a theoretical gap of 2mm between the working surface on the web side and the web surface of the composite material sleeve beam. The working surface of the metal joint section on the flange side of the composite material sleeve beam is offset by 0.5mm from its theoretical position towards the inner surface of the composite material sleeve beam, meaning there is a theoretical gap of 0.5mm between the working surface on the flange side and the flange surface of the composite material sleeve beam.

[0012] The working surfaces on the web and flange sides of the composite material fitting beam are offset from their theoretical positions and manufactured accordingly. This is to allow for the insertion of process compensation shims into the gaps between the working surfaces on the web and flange sides and the corresponding web and flange sides of the composite material fitting beam. The web surface of the composite material fitting beam is commonly found on flat surfaces, while the flange surface is commonly found on curved surfaces. Several process compensation shims are used to fill the gaps between the working surfaces on the web and flange sides and the corresponding web and flange sides of the composite material fitting beam. Each shim layer is 0.1 mm thick and made of stainless steel or copper. Stainless steel and copper sheets offer flexibility, deformability, and low cost. Different numbers of shims are selected based on the desired filling gap.

[0013] The working surface on the flange side extends 75-100mm from the edge of the flange position of the composite material fitting beam, and the drilling bushing is located on the extended surface of the working surface on the flange side. A 90° angle air drill is preferred for use with the drilling bushing to ensure complete process allowance at the flange of the composite material fitting beam. The 90° angle air drill performs drilling operations along the drilling bushing from the inside to the outside of the flange surface of the composite material fitting beam.

[0014] High-precision bolts and nuts are fitted with drilled bushing holes to connect the composite material sleeve beam flange area within the manufacturing allowance region. The high-precision bolts connecting this area utilize a smooth rod design; the length and precision of the smooth rod ensure the connection accuracy between the high-precision bolts, the metal joint, and the composite material sleeve beam. The threaded portion of the high-precision bolts is the threaded part that connects with the nut. Connecting holes are drilled in the manufacturing allowance region of the composite material sleeve beam flange using a drilled bushing, through which the high-precision bolts connect to the metal joint and the composite material sleeve beam.

[0015] When composite material assembly beams are transferred downstream for assembly, such as composite material rudder box sections, they are generally connected to composite material ribs. This requires drilling holes and placing standard parts at the connection points. The metal joint at these connection points should be capable of drilling holes while avoiding the placement of standard part nail heads. The working surface on the web side is designed with through holes and a removable drill jig. The removable drill jig fits onto the through holes, with the diameter φa of the through hole being 2-3 mm larger than the diameter of the standard part nail head. The diameter of the bushing hole in the removable drill jig depends on the diameter of the standard part nail shank. The connecting holes for the standard parts are drilled using the removable drill jig. After drilling, the drill jig is removed. Standard parts are used to connect the upper beams and ribs in the composite material assembly structure frame, with the standard part nail head side located on the removable drill jig side.

[0016] A structural schematic diagram of the positioning part of the assembly tooling is shown below. Figure 3 , Figure 4 The assembly tooling positioning part mainly consists of the positioning metal joint part and the positioning composite material sleeve beam part.

[0017] The structural schematic diagram of the positioning metal connector is shown below. Figure 4 Figure 5 shows that it is mainly composed of components such as a platform and connecting components.

[0018] The platform height is between 1200mm and 1400mm, which is designed to facilitate assembly work while the operator is standing.

[0019] The connecting assembly mainly consists of components such as columns, clamping device supports, clamping devices, lateral clamping devices, connectors, supports, drill jig back plates, fixing sleeves, and clamping device sleeves.

[0020] The column is fixed to the platform by a mechanical connection of screws and pins, the support is fixed to the column by a mechanical connection of screws and pins, and the fixing sleeve is fixed to the column by a mechanical connection of screws. The fixing sleeve has a through hole structure.

[0021] The lateral clamp is cylindrical in shape, with a rotating rod on one side and an actuating head on the other. The lateral clamp moves axially through the through-hole structure of the fixed sleeve. It has a clearance fit with the fixed sleeve and is distributed on both sides of the flange outer surface of the composite material sleeve beam. The lateral clamp acts on the flange outer surface of the composite material sleeve beam to ensure that the relative position of the composite material sleeve beam remains fixed.

[0022] The connector is fixed to the support by a locating pin. The connector has two staggered pin holes. The connector can be connected and fixed to the metal joint part by the metal locating pin through the pin holes.

[0023] The drill jig back plate is fixed to the connector by a locating pin. The drill jig back plate acts on the flange side of the composite material fitting beam. The drill jig back plate is manufactured by extracting the outer surface of the flange of the composite material fitting beam and offsetting it outward by 2mm. The drill jig back plate is designed with a through hole at the position of the drill bushing. The purpose is to ensure that when the drill bushing passes through the drill bit and drills the composite material fitting beam, the drill exit end has a support to prevent fiber splitting during the drilling process of the composite material fitting beam.

[0024] See the schematic diagram of the structure containing the clamping device. Figure 7 The main body of the jacking device support is cylindrical with an internal through-hole design. Both ends of the jacking device support have flange structures. One flange structure is fixed to the platform by a mechanical connection of screws and pins, while the other flange structure is connected and fixed to the jacking device sleeve by the same mechanical connection of screws and pins. The jacking device sleeve adopts a semi-circular annular groove design.

[0025] The handle nut features a boss structure on the outside and a threaded hole on the inside. The handle nut engages with the semi-circular annular groove of the clamping sleeve through its own boss structure. The handle nut and the clamping sleeve are fitted with a clearance to ensure that the handle nut can rotate around its own axis.

[0026] The handle nut features a threaded hole design. The main body of the clamping device is a threaded rod design. The clamping device and the handle nut are screwed together. Rotating the handle nut drives the clamping device to move along its own axis. The outer diameter of the clamping device is accommodated within the through hole of the clamping device support to ensure the range of motion of the clamping device. This allows the clamping device to act on the web surface of the composite material sleeve beam to maintain a clamped state, and also to move away from the web surface of the composite material sleeve beam to maintain a relaxed state, facilitating the loading and unloading of the composite material sleeve beam.

[0027] See the structural schematic diagram of the part of the positioning composite material fitting beam. Figure 3 , Figure 4 It is mainly composed of components such as the adjustable end of the beam end face, the fixed end of the beam end face, and the outer surface clamping plate of the flange strip.

[0028] The structural schematic diagram of the adjustable end of the beam end face is shown in Figure 6. The adjustable end of the beam end face mainly consists of components such as the end face action end, dial indicator, slotted screw, handle nut, T-key, sleeve, protrusion block, positioning pin, and indicator base.

[0029] The adjustable end of the beam is fixed to the column by a mechanical connection of screws and pins using a sleeve.

[0030] The socket has a through hole design inside, and one side of the socket has a semi-circular annular groove design. The top of the socket has a protrusion block, which is fixed to the top of the socket by welding. The working surface of the protrusion block is the working surface of the dial indicator's measuring head. The position of the working surface of the protrusion block should be perpendicular to the direction of movement of the dial indicator's measuring head. The top of the socket has a mating hole for cooperating with the T-key.

[0031] The handle nut features a boss structure on the outside and a threaded hole on the inside. The handle nut engages with the semi-circular annular groove of the socket through its own boss structure. The handle nut and the socket are fitted with a clearance fit to ensure that the handle nut can rotate around its own axis.

[0032] The outer diameter of the slotted lead screw is accommodated within the through hole of the sleeve to ensure that the slotted lead screw moves along its own axis. The sleeve supports the slotted lead screw. The handle nut is connected to the slotted lead screw by a screw connection.

[0033] One end of the T-key acts on the slotted lead screw, and the other end acts on the mating hole on the top of the sleeve that mates with the T-key. The purpose of the T-key is to ensure that the slotted lead screw does not deflect around its own axis when moving along its own axis.

[0034] The working surface of the end face is manufactured by extracting the shape of one end face of the composite material fitting beam, and the working surface of the end face is fixed to the slotted screw by means of metal positioning pin.

[0035] The dial indicator has a measuring range of 0-10mm and a graduation value of 0.01mm. The measuring rod and measuring head of the dial indicator are perpendicular to the working surface of the protrusion, and the direction of movement of the measuring rod and measuring head of the dial indicator should be parallel to the axis of the slotted lead screw.

[0036] The dial holder has a through-hole design, and the dial holder and the slotted lead screw are in an interference fit relationship to ensure that the dial holder is fixed on the slotted lead screw and moves along the direction of the slotted lead screw along its own axis.

[0037] The dial indicator base has a through-hole design, and the dial indicator base and the bushing of the dial indicator are in an interference fit relationship to ensure that the dial indicator is fixed on the base, and the measuring rod and measuring head of the dial indicator are in a relatively free extension and retraction state.

[0038] The rotation of the handle nut drives the slotted screw to move laterally, which in turn drives the end face action end to move laterally. A through hole is designed at the connection between the sleeve and the slotted screw. The diameter of the positioning pin is consistent with the diameter of the through hole. When the positioning pin is inserted into the through hole of the sleeve and the slotted screw, the theoretical distance between the action surface of the end face action end and the axial direction of one end face of the composite material sleeve beam is 5mm. The measuring head of the dial indicator is at the position of 10mm elongation and acts on the action surface of the protrusion.

[0039] With the end face in its theoretical position, pull out the positioning pin and rotate the handle nut to drive the slotted screw to move laterally. This will cause the end face to move towards the axial direction of the end face of the composite material sleeve beam until the working surface of the end face is in contact with one end face of the composite material sleeve beam. At this point, record the dial gauge reading 'a' on the working surface of the protrusion. The actual axial dimension deviation of the composite material sleeve beam is Δ = 5 - a. If Δ > 0, the actual axial dimension of the composite material sleeve beam is larger than the theoretical dimension; if Δ < 0, the axial dimension of the composite material sleeve beam is smaller than the theoretical dimension.

[0040] The structural schematic diagram of the fixed end of the beam end face is shown in Figure 8. The fixed end of the beam end face adopts a similar structural form, positioning and movement method as the adjustable end of the beam end face. The fixed end of the beam end face mainly consists of components such as the end face action end, slotted screw, handle nut, T-key, sleeve, and positioning pin.

[0041] The working surface of the end face is manufactured by extracting the shape of the other end face of the composite material sleeve beam. The end face has a slotted position designed at the position of the two side edge strips of the composite material sleeve beam. A placeholder is placed at the slotted position. The placeholder is extracted and manufactured according to the shape of the two side edge strips of the composite material sleeve beam. The purpose of the placeholder is to ensure that the composite material sleeve beam is in the center position of the end face. The end face is fixed to the slotted screw by a metal positioning pin.

[0042] The rotation of the handle nut drives the slotted screw to move laterally, which in turn drives the end face of the working end to move laterally. A through hole is designed at the connection between the sleeve and the slotted screw. The diameter of the positioning pin is consistent with the diameter of the through hole. When the positioning pin is inserted into the through hole of the sleeve and the slotted screw, the theoretical distance between the working surface of the end face and the axial direction of the other end face of the composite material sleeve beam is 0mm, which is the theoretical position of the other end face of the composite material sleeve beam.

[0043] The structural schematic diagram of the flange outer surface clamping plate is shown in Figure 9. The functional surface of the flange outer surface clamping plate is manufactured based on the flange outer surface of the composite material fitting beam and offset outward by 2mm. The flange outer surface clamping plate is connected to the support plate by screws and positioning pins. The support plate is positioned and connected to the L-shaped support by screws and positioning pins. The L-shaped support is fixed to the platform by a mechanical connection of screws and positioning pins.

[0044] When measuring the flange profile of the composite material sleeve beam, a feeler gauge is used to measure the gap between the flange profile gauge plate and the flange profile of the composite material sleeve beam. The theoretical gap value is 2mm. The actual deviation of the flange profile of the composite material sleeve beam is calculated based on the gap value measured by the feeler gauge.

[0045] If the actual gap value measured by the feeler gauge is 3mm, then the actual deviation of the outer surface of the composite material fitting beam edge strip is -1mm.

[0046] If the actual gap value measured by the feeler gauge is 1mm, then the actual deviation of the outer surface of the composite material fitting beam edge strip is 1mm.

[0047] A structural schematic diagram of the fitting assembly part is shown below. Figure 10 The fitting assembly is a connecting component, mainly composed of components such as columns, clamping device supports, clamping devices, side clamping devices, supports, handle nuts, drill jigs, connecting parts, drill jig back plates, and clamping device sleeves.

[0048] The connecting components can support composite material fitting beams, position composite material fitting beams, and realize the drilling and connection of composite material fitting beams.

[0049] The structural form, connection form, and function of the column, the clamping device support, the clamping device, the lateral clamping device, the support, the handle nut, and the clamping device sleeve are described above.

[0050] The drill jig is designed with an action table that is flush with the end face of the connector. The drill jig is positioned on the connector by inserting the action table and metal positioning pins into the pin holes of the connector.

[0051] The drill jig and the support have through holes. The outer diameter of the lateral clamp is accommodated within the through hole, so that the lateral clamp passes through the support and the drill jig and acts on the flange surface of the composite material sleeve beam to ensure that the flange surface of the composite material sleeve beam is fixed.

[0052] The connector is fixed to the support by locating pins, and the connector is designed with pin holes. The connector can be connected and fixed to the drill jig by metal locating pins through the pin holes. The connector is designed with a drill jig back plate, which acts on the flange side of the composite material fitting beam. The drill jig back plate is manufactured by extracting the outer surface of the flange of the composite material fitting beam and offsetting it outward by 2mm. The drill jig back plate is designed with through holes at the bushing hole position of the drill jig. The purpose is to ensure that when the drill jig passes through the drill bit and drills the fitting assembly part of the composite material fitting beam, the drill exit end has a support to prevent fiber splitting during the drilling process of the composite material fitting beam.

[0053] The beneficial effects of this invention are:

[0054] (1) The present invention can realize the assembly of multiple secondary components-composite material beams to form composite material nested beams.

[0055] (2) This invention innovatively proposes a metal joint structure to replace the commonly used metal hinge arm, simplifying the metal hinge arm into a metal joint with drilling, connection, and surface compensation. The metal joint is equipped with high-precision bolts and nuts, realizing the connection function after drilling, and ensuring the precise connection between the metal joint and the composite material fitting beam. A gap shim can be added between the metal joint and the composite material fitting beam to meet process requirements such as heat straightening.

[0056] (3) This invention can flexibly assemble composite material fitting beams with varying axial dimensions without disassembling or installing tooling parts, greatly shortening the development cycle of composite material fitting beams.

[0057] (4) The axial dimension of the composite material sleeve beam assembled in this invention varies considerably from the theoretical axial dimension:

[0058] -5-5mm, high assembly accuracy: assembly accuracy 0.01mm. Attached Figure Description

[0059] Figure 1 Schematic diagram of a metal hinged support arm structure;

[0060] Figure 2(a) Schematic diagram of the metal joint installation structure;

[0061] Figure 2(b) Schematic diagram of metal joints and high-precision bolts, nuts, etc.;

[0062] Figure 2(c) Schematic diagram of high-precision bolt and nut structure;

[0063] Figure 3 Top view of the assembly fixture;

[0064] Figure 4 Partial front view of the assembly fixture;

[0065] Figure 5(a) Perspective view of the metal joint device of the assembly tooling;

[0066] Figure 5(b) Front view of the metal joint positioning part of the assembly tooling;

[0067] Figure 5(c) Side view of the metal joint positioning part of the assembly tooling;

[0068] Figure 6(a) Three-dimensional view of the adjustable end portion;

[0069] Figure 6(b) Side view of the adjustable end portion;

[0070] Figure 7 Schematic diagram of the structure containing the clamping device;

[0071] Figure 8(a) Perspective view of the fixed end portion;

[0072] Figure 8(b) Side view of the fixed end portion;

[0073] Figure 9(a) Front view of the flange strip outer surface of the clamping plate;

[0074] Figure 9(b) Side view of the flange strip outer surface of the clamping plate;

[0075] Figure 10 Schematic diagram of the fitting assembly.

[0076] In the diagram: 1. Metal hinge arm; 2. Central axis of the intersection of the metal hinge arms; 3. Metal joint; 4. Drill bushing; 5. Working surface on the flange side; 6. Working surface on the web side; 7. Demountable drill jig; 8. High-precision bolt; 9. Nut; 10. Platform; 11. Column; 12. Tensioner support; 13. Connecting assembly; 14. Tensioner; 15. Lateral tensioner; 16. Connector; 17. Support; 18. Drill jig back plate; 19. Fixing sleeve; 20. Flange outline. 21. Faceplate; 22. L-shaped support; 23. Adjustable end face of beam; 24. Acting end face of beam; 25. Dial indicator; 26. Slotted lead screw; 27. Handle nut; 28. T-key; 29. ​​Sleeve; 30. Protrusion block; 31. Positioning pin; 32. Indicator base; 33. Fixed end face of beam; 34. Acting end face of beam; 35. Connecting assembly; 36. Drill jig; 37. Connector; 38. Drill jig back plate; 39. Acting table; 40. Spacer plate; 41. Support plate; 42. Tightener sleeve. Detailed Implementation

[0077] The method for using the assembly tooling for the composite material sleeve beam is as follows:

[0078] 1. Prepare multiple secondary components - composite material beams.

[0079] 2. Remove the metal joint part 3 from the assembly fixture, and remove the side of the connector 16 and connector 36 that are connected to the support 17, keeping the connector 16 and connector 36 in the open state.

[0080] 3. Rotate the clamping device 14 to the low position, not higher than the working surface of the support plate 40, to ensure that when placing the secondary component - composite beam, the clamping device 14 does not interfere with the web surface of the secondary component - composite beam.

[0081] 4. In the adjustable end section, i.e., the adjustable end 22 of the beam end face, the rotation of the handle nut 26 drives the slotted screw 25 to move laterally, which in turn drives the end face action end 23 to move laterally. A through hole is designed at the connection between the sleeve 28 and the slotted screw 25, and the diameter of the positioning pin 30 is consistent with the diameter of the through hole. When the positioning pin 30 is inserted into the through hole, the initial axial distance between the action surface of the end face action end 23 and one side end face of the composite material sleeve beam is 5mm, and the measuring head of the dial indicator 24 is at the position of 10mm elongation and acts on the action surface of the protrusion 29.

[0082] 5. At the fixed end, i.e., the fixed end 32 of the beam end face, the rotation of the handle nut 26 drives the slotted screw 25 to move laterally, which in turn drives the end face action end 23 to move laterally. A through hole is designed at the connection between the sleeve 28 and the slotted screw 25. The diameter of the positioning pin 30 is consistent with the diameter of the through hole. When the positioning pin 30 is inserted into the through hole, the action surface of the end face action end 33 is located at the theoretical zero point position of one side end face of the composite material fitting beam. A placeholder piece 39 is placed in the slot of the end face action end 33.

[0083] 6. On the assembly fixture, place the secondary component - composite material beam in sequence according to the fitting structure of the composite material fitting beam, so as to facilitate the subsequent positioning and fixing of the secondary component - composite material beam.

[0084] 7. The metal connector 3 is connected to connector 16 and connector 36 via a locating pin.

[0085] 8. Connect the open connectors 16 and 36 to the support 17 via the locating pins to keep the connectors 16 and 36 in the closed working state.

[0086] 9. In the secondary component - composite material beam - of the fixed end 32 near the beam end face, process compensation shims are inserted into the gaps between the working surface 5 on the flange side and the working surface 6 on the web side of the metal joint part 3 and the flange surface and web surface of the composite material fitting beam, respectively. The process compensation shims are determined according to the process requirements.

[0087] 10. On the outer surface of the web of the secondary component-composite beam at the near-beam end fixed end 32, tighten the clamping device 14 to ensure a tight fit between the web surface of the secondary component-composite beam, the metal joint part 3, and the process compensation shim. Because the working surface of the support plate 40 is 3mm lower than the theoretical web outer surface of the composite composite beam, i.e., the secondary component-composite beam at the near-beam end fixed end 32 is 3mm lower than the theoretical position, tightening the clamping device 14 will cause the end face of the secondary component-composite beam at the near-beam end fixed end 32 to rise continuously. This may result in partial misfitting between the end face of the secondary component-composite beam at the near-beam end fixed end 32 and the end face working end 33. It is necessary to use a non-metallic tool such as a rubber mallet to apply force to the end face of the secondary component-composite beam to ensure complete fit between the end face of the secondary component-composite beam and the end face working end 33, and ultimately reach a state where the clamping device 14 cannot be tightened.

[0088] 11. Use the lateral clamp 15 to act on the flange surface of the secondary component - composite material beam near the fixed end 32 of the beam end face, thus completing the positioning and fixing of the secondary component - composite material beam near the fixed end 32 of the beam end face.

[0089] 12. Based on process requirements, provide the axial dimensional deviation L of the composite material fitting beam, which is the deviation between the actual axial dimension of the composite material fitting beam required for assembly and the theoretical dimension, -5mm≤L≤5mm. In the adjustable end section, i.e., the adjustable end 22 of the beam end face, when positioned by the positioning pin 30, the initial axial distance between the working surface of the end face 23 and one side end face of the composite material fitting beam is 5mm.

[0090] Based on the comparison of the axial dimensional deviation L of the composite material sleeve beam with the initial spacing of 5mm, the rotation scale value a of the dial indicator 24 acting on the working surface of the protrusion 29 is given, where a = 5 - L. The rotation of the handle nut 26 drives the slotted screw 25 to move laterally. The rotation of the handle nut 26 is a unidirectional movement, meaning that the unidirectional movement drives the end face acting end 23 to move towards the axial direction of the end face of the composite material sleeve beam. Simultaneously, the dial indicator 24 acting on the working surface of the protrusion 29 rotates, with the rotation scale value a, indicating that the working surface of the end face acting end 23 reaches the set position required by the process.

[0091] If the axial dimension deviation L of the composite material fitting beam is 2mm, then the rotation scale value a is 3mm.

[0092] If the axial dimension deviation L of the composite material fitting beam is -2mm, then the rotation scale value a is 7mm.

[0093] 13. Inside the secondary component—the composite material beam—at the near-beam end fixed end 22, a process compensation shim is inserted into the gap between the working surface 5 on the flange side and the working surface 6 on the web side of the metal joint portion 3 and the flange and web surfaces of the composite material fitting beam. The thickness of the process compensation shim is determined according to process requirements. Outside the web surface of the secondary component—the composite material beam—at the near-beam end fixed end 22, the tightening device 14 is screwed on to ensure a tight fit between the inner side of the web surface of the composite material fitting beam, the metal joint portion 3, and the process compensation shim. Because the working surface of the support plate 40 is 3mm lower than the theoretical web surface of the composite material sleeve beam, that is, the secondary component - composite material beam placed near the adjustable end 22 of the beam end face is 3mm lower than the theoretical position, tightening the clamping device 14 will cause the end face of the secondary component - composite material beam near the adjustable end 22 of the beam end face to rise continuously. It is possible that the end face of the secondary component - composite material beam near the adjustable end 22 of the beam end face will not fit with the end face working end 23 in some places. It is necessary to use non-metallic tools such as rubber hammers to act on the end face of the secondary component - composite material beam to ensure that the end face of the secondary component - composite material beam fits completely with the end face working end 23, and finally reach the state where the clamping device 14 cannot be tightened.

[0094] 14. Use the lateral clamping device 15 to act on the flange surface of the secondary component - composite material beam near the fixed end 22 of the beam end face, thus completing the positioning and fixing of the secondary component - composite material beam near the fixed end 22 of the beam end face.

[0095] 15. Install the drill jig 35, and use the lateral clamping device 15 to act on the flange surface of the composite material fitting beam to ensure a tight fit at the fitting joint of the composite material fitting beam.

[0096] At the mating joint of the composite material fitting beam, a φ2.6mm diameter connecting hole is drilled using a drill jig 35. A countersunk notch is then made in the connecting hole, with the countersunk notch located on the outer surface of the mating joint of the composite material fitting beam. The drill jig 35 is then removed, and rivets are used to connect the mating joint of the composite material fitting beam at the connecting hole. The rivet head is located in the countersunk notch, ensuring that the rivet head does not protrude above the outer surface of the mating joint of the composite material fitting beam. The preferred rivet specification is HB6306-2.5xL.

[0097] 16. The drill jig back plate 18 is connected and fixed by connectors 16 and 36. Using a 90° angle air drill, drill along the metal joint bushing 4 to complete the drilling at the edge of the composite material fitting beam. After drilling, use high-precision bolts 8 and nuts 9 to connect the metal joint bushing hole 4 and the edge of the composite material fitting beam, with the bolt head inside the inner surface of the edge of the composite material fitting beam and the nut outside the outer surface of the edge of the composite material fitting beam.

[0098] 17. Use a feeler gauge to measure the gap between the flange outer surface of the clamping plate 20 and the flange outer surface of the composite material fitting beam. Reserve a gap value of 2mm. Calculate the actual deviation of the flange outer surface of the composite material fitting beam based on the gap value measured by the feeler gauge.

[0099] If the actual gap value measured by the feeler gauge is 3mm, then the actual deviation of the outer surface of the composite material fitting beam edge strip is -1mm.

[0100] If the actual gap value measured by the feeler gauge is 1mm, then the actual deviation of the outer surface of the composite material fitting beam edge strip is 1mm.

[0101] 18. Remove the locating pin on the metal joint part 3, remove the lateral clamp 15, remove the clamp 14, and remove the side of the connector 16 and connector 36 that are connected to the support 17, keeping the connector 16 and connector 36 in the open state. Pull out the locating pin 30 of the fixed end 32 of the beam end face, rotate the handle nut 26 to make the end face action end 23 and end face action end 33 move laterally away from the composite material sleeve beam, disassemble the composite material sleeve beam from the assembly fixture and transfer it to the downstream assembly such as the composite material rudder box section assembly.

Claims

1. An assembly fixture for composite material fitting beams, characterized in that, This includes the metal joint part, the assembly tooling positioning part, and the fitting assembly part; The metal joint part (3) includes a drilling bushing (4), a working surface (5) on the flange side, a working surface (6) on the web side, a detachable drill jig (7), a high-precision bolt (8), and a nut (9); The metal joint part (3) simplifies the metal hinge arm (1), retains the position of the central axis (2) of the intersection of the metal hinge arm and designs a through hole with a diameter of φ6mm-φ10mm with it as the center; The working surface (6) on the web side and the working surface (5) on the flange side are offset from the theoretical positions of the web surface and flange surface of the composite material sleeve beam and manufactured. The working surface (5) on the flange side extends 75-100mm relative to the edge of the flange position of the composite material sleeve beam. The drilling bushing (4) is located on the extension surface of the working surface (5) on the flange side. The drilling tool used with the drilling bushing (4) is a 90° angle air drill. The drilling bushing (4) is equipped with a high-precision bolt (8) and a nut (9). The high-precision bolt (8) is designed with a smooth rod to connect the process allowance area of ​​the composite material sleeve beam edge strip. The threaded part of the high-precision bolt (8) is the threaded part of the nut (9). The drilling bushing (4) drills the connection hole of the process allowance of the composite material sleeve beam edge strip. The high-precision bolt (8) is connected to the metal joint part (3) and the composite material sleeve beam through the connection hole. The assembly tooling positioning part includes a part for positioning the metal joint and a part for positioning the composite material sleeve beam; The positioning metal joint includes a platform (10) and a connecting assembly (13); the height of the platform (10) is between 1200mm and 1400mm, and the connecting assembly (13) includes a column (11), a clamping device support (12), a clamping device (14), a side clamping device (15), a connector (16), a support (17), a drill jig back plate (18), a fixing sleeve (19), and a clamping device sleeve (41). The column (11) is fixed to the platform (10) by a mechanical connection of screws and pins, the support (17) is fixed to the column (11) by a mechanical connection of screws and pins, and the fixing sleeve (19) is fixed to the column (11) by a mechanical connection of screws. The fixing sleeve (19) has a through hole structure. The main body of the lateral clamp (15) is a cylinder with a rotating rod on one side and an actuating head on the other side. The lateral clamp (15) is movable in its axial direction through the through hole structure of the fixed sleeve (19). The lateral clamp (15) and the fixed sleeve (19) are in clearance fit. The lateral clamp (15) is distributed on both sides of the flange outer surface of the composite material sleeve beam. The lateral clamp (15) acts on the flange outer surface of the composite material sleeve beam. Connector 1 (16) is fixed to support (17) by positioning pin. Connector 1 (16) has two pin holes arranged in an alternating pattern. The metal positioning pin can be used to connect and fix connector 1 (16) to metal connector part (3) through the pin holes. Drill jig back plate 1 (18) is fixed to connector 1 (16) by locating pin. Drill jig back plate 1 (18) acts on the flange side of composite material sleeve beam. Drill jig back plate 1 (18) is manufactured by extracting the flange outer surface of composite material sleeve beam and offsetting it outward by 2mm. Drill jig back plate 1 (18) has a through hole designed at the position of drill bushing (4). The positioning composite material fitting beam includes an adjustable end (22) of the beam end face, a fixed end (32) of the beam end face, and a flange outer surface clamping plate (20). The adjustable end face of the beam (22) includes an end face working end (23), a dial indicator (24), a slotted screw (25), a handle nut (26), a T-key (27), a sleeve (28), a protrusion (29), a positioning pin (30), and a gauge base (31). The adjustable end (22) of the beam end face is fixed to the column (11) by a mechanical connection of screws and pins through the sleeve (28); The sleeve (28) has a through hole design inside. One side of the sleeve (28) adopts a semi-circular annular groove design. The top of the sleeve (28) is designed with a protrusion (29). The protrusion (29) is fixed to the top of the sleeve (28) by welding. The working surface of the protrusion (29) is the working surface of the measuring head of the dial indicator (24). The position of the working surface of the protrusion (29) should be perpendicular to the moving direction of the measuring head of the dial indicator (24). The top of the sleeve (28) is designed with a mating hole that mates with the T-key (27). The handle nut (26) adopts a boss structure design on the outside and a threaded hole design on the inside. The handle nut (26) is engaged with the semi-circular annular groove of the sleeve (28) through its own boss structure. The handle nut (26) and the sleeve (28) are in clearance fit to ensure that the handle nut (26) can rotate around its own axis. The outer diameter of the slotted lead screw (25) is accommodated within the through hole of the sleeve (28) to ensure that the slotted lead screw (25) moves along its own axis. The sleeve (28) serves to support the slotted lead screw (25). The handle nut (26) is connected to the slotted lead screw (25) by a screw connection. The rotation of the handle nut (26) drives the slotted screw (25) to move laterally, which in turn drives the end face action end (23) to move laterally. A through hole is designed at the connection between the sleeve (28) and the slotted screw (25). The diameter of the positioning pin (30) is consistent with the diameter of the through hole. When the positioning pin (30) is inserted into the through hole of the sleeve (28) and the slotted screw (25), the theoretical distance between the action surface of the end face action end (23) and the axial direction of one side end face of the composite material sleeve beam is 5mm. The measuring head of the dial indicator (24) is at the position of 10mm elongation and acts on the action surface of the protrusion (29). The beam end face fixed end (32) includes end face action end two (33), slotted screw (25), handle screw nut (26), T-key (27), sleeve (28), and positioning long pin (30); The end face action end two (33) is designed with a slotted position at the position of the two side edge strips of the composite material sleeve beam. The slotted position is used to place the occupant piece (39). The occupant piece (39) is extracted and manufactured according to the outer surface of the two side edge strips of the composite material sleeve beam. The purpose of the occupant piece (39) is to ensure that the composite material sleeve beam is in the center position of the end face action end two (33). The end face action end two (33) is fixed to the slotted screw (25) by the connection of metal positioning pins. The rotation of the handle nut (26) drives the slotted screw (25) to move laterally, which in turn drives the end face action end two (33) to move laterally. A through hole is designed at the connection between the sleeve (28) and the slotted screw (25). The diameter of the positioning pin (30) is consistent with the diameter of the through hole. When the positioning pin (30) is inserted into the through hole of the sleeve (28) and the slotted screw (25), the theoretical distance between the action surface of the end face action end two (33) and the axial direction of the other end face of the composite material sleeve beam is 0mm, which is the theoretical position of the other end face of the composite material sleeve beam. The working surface of the flange outer surface plate (20) is manufactured based on the flange outer surface of the composite material fitting beam and offset outward by 2mm. The flange outer surface plate (20) is connected to the support plate (40) by screws and positioning pins. The support plate (40) is positioned and connected to the L-shaped support (21) by screws and positioning pins. The L-shaped support (21) is fixed on the platform (10) by the mechanical connection of screws and positioning pins. The fitting assembly includes a column (11), a clamping device support (12), a clamping device (14), a lateral clamping device (15), a support (17), a handle nut (26), a drill jig (35), a second connector (36), a second drill jig back plate (37), and a clamping device sleeve (41). The drill jig (35) has a through hole design, the support (17) has a through hole design, and the outer diameter of the lateral clamp (15) is accommodated within the through hole size so that the lateral clamp (15) passes through the support (17) and the drill jig (35) and acts on the flange surface of the composite material sleeve beam to ensure that the flange surface of the composite material sleeve beam is fixed. Connector 2 (36) is fixed to support (17) by positioning pin. Pin hole is designed on connector 2 (36). Connector 2 (36) and drill jig (35) can be connected and fixed by metal positioning pin through pin hole. Connector 2 (36) is designed with drill jig back plate 2 (37). Drill jig back plate 2 (37) acts on the flange side of composite material fitting beam. Drill jig back plate 2 (37) is manufactured by extracting the flange outer surface of composite material fitting beam and offsetting it outward by 2mm. Drill jig back plate 2 (37) is designed with through hole at bushing hole position of drill jig (35). The purpose is to ensure that when drill jig (35) passes through drill bit and drills the fitting assembly part of composite material fitting beam, the drill hole lead-out end has support to prevent fiber splitting during drilling of composite material fitting beam.

2. The assembly tooling for the composite material fitting beam as described in claim 1, characterized in that, The working surface (6) of the metal joint part (3) located on the web surface side of the composite material fitting beam is offset by 2mm from the inner surface of the composite material fitting beam according to the theoretical position, that is, there is a theoretical gap of 2mm between the working surface (6) on the web surface side and the web surface of the composite material fitting beam; the working surface (5) of the metal joint part (3) located on the flange surface side of the composite material fitting beam is offset by 0.5mm from the inner surface of the composite material fitting beam according to the theoretical position, that is, there is a theoretical gap of 0.5mm between the working surface (5) on the flange surface side and the flange surface of the composite material fitting beam.

3. The assembly tooling for the composite material fitting beam as described in claim 2, characterized in that, The working surface (6) on the web side is designed with through holes and a detachable drill jig (7). The detachable drill jig (7) fits onto the through hole. The diameter φa of the through hole is 2-3 mm larger than the diameter of the standard part nail head. The detachable drill jig (7) fits onto the through hole. The diameter of the bushing hole of the detachable drill jig (7) depends on the diameter of the standard part nail rod. The detachable drill jig (7) is used to drill the connection hole of the standard part. After drilling, the detachable drill jig (7) is removed. The standard part is used to connect the upper beam and the rib in the composite material assembly structure skeleton. The nail head side of the standard part is located on the side of the detachable drill jig (7).

4. The assembly tooling for the composite material fitting beam as described in claim 3, characterized in that, The main body of the clamping device support (12) is cylindrical with a through hole design inside. Both ends of the clamping device support (12) have flange structures. One flange structure is fixed to the platform (10) by a mechanical connection of screws and pins, and the other flange structure is connected and fixed to the clamping device sleeve (41) by a mechanical connection of screws and pins. The clamping device sleeve (41) adopts a semi-circular annular groove design.

5. The assembly tooling for the composite material fitting beam as described in claim 4, characterized in that, The handle nut (26) has a boss structure on the outside and a threaded hole on the inside. The handle nut (26) engages with the semi-circular annular groove of the tightening sleeve (41) through its own boss structure. The handle nut (26) and the tightening sleeve (41) are in clearance fit to ensure that the handle nut (26) can rotate around its own axis.

6. The assembly tooling for the composite material fitting beam as described in claim 5, characterized in that, The handle nut (26) has a threaded hole design inside; the main body of the clamping device (14) is a threaded rod design. The clamping device (14) and the handle nut (26) are screwed together. By rotating the handle nut (26), the clamping device (14) is driven to move along its own axis.

7. The assembly tooling for the composite material fitting beam as described in claim 6, characterized in that, The T-key (27) is applied at one end to the slotted lead screw (25) and at the other end to the mating hole of the top of the sleeve (28) that mates with the T-key (27). The purpose of the T-key (27) is to ensure that the slotted lead screw (25) does not deflect around its axis when it moves along its own axis.

8. The assembly tooling for the composite material fitting beam as described in claim 7, characterized in that, The dial indicator (24) has a range of 0-10mm and a graduation value of 0.01mm. The measuring rod and measuring head of the dial indicator (24) are perpendicular to the working surface of the protrusion block (29), and the movement direction of the measuring rod and measuring head of the dial indicator (24) should be parallel to the axis of the slotted lead screw (25).

9. The assembly tooling for the composite material fitting beam as described in claim 8, characterized in that, The dial indicator base (31) has a through hole design, and the dial indicator base (31) and the slotted lead screw (25) are in an interference fit relationship to ensure that the dial indicator base (31) is fixed on the slotted lead screw (25) and moves along its own axis as the slotted lead screw (25) moves. The dial indicator base (31) has a through hole design, and the dial indicator base (31) and the bushing of the dial indicator (24) are in an interference fit relationship to ensure that the dial indicator (24) is fixed on the dial indicator base (31), and the measuring rod and measuring head of the dial indicator (24) are in a relatively free extension and retraction state.

10. A method of using the assembly tooling for the composite material fitting beam as described in claim 9, characterized in that, The steps are as follows: Step 1: Prepare multiple secondary components – composite material beams; Step 2: Remove the metal joint part (3) from the assembly fixture, remove the first connector (16) and the second connector (36) from the side connected to the support (17), and keep the first connector (16) and the second connector (36) in the open state. Third step: Rotate the clamping device (14) to the low position, not higher than the working surface of the support plate (40), to ensure that when placing the secondary component - composite beam, the clamping device (14) does not interfere with the web surface of the secondary component - composite beam. Step 4: In the adjustable end part, i.e. the adjustable end (22) of the beam end face, the handle nut (26) is rotated to drive the slotted screw (25) to move laterally, and then drive the end face action end one (23) to move laterally; a through hole is designed at the connection between the sleeve (28) and the slotted screw (25), and the diameter of the positioning pin (30) is consistent with the diameter of the through hole; when the positioning pin (30) is inserted into the through hole, the initial distance between the action surface of the end face action end one (23) and the axial direction of one side end face of the composite material sleeve beam is 5mm, and the measuring head of the dial indicator (24) is at the position of 10mm elongation and acts on the action surface of the protrusion (29); Step 5: At the fixed end part, i.e. the fixed end (32) of the beam end face, the handle nut (26) rotates to drive the slotted screw (25) to move laterally, and then drive the end face action end one (23) to move laterally; a through hole is designed at the connection between the sleeve (28) and the slotted screw (25), and the diameter of the positioning pin (30) is consistent with the diameter of the through hole. When the positioning pin (30) is inserted into the through hole, the action surface of the end face action end two (33) is located at the theoretical zero point position of one side end face of the composite material sleeve beam; a placer piece (39) is placed in the slot of the end face action end two (33). Step 6: Place the secondary component - composite material beam in sequence on the assembly fixture according to the fitting structure of the composite material fitting beam, so as to facilitate the subsequent positioning and fixing of the secondary component - composite material beam; Step 7: The metal connector (3) is connected to connector one (16) and connector two (36) via locating pins. Step 8: Connect the open connector 1 (16) and connector 2 (36) to the support (17) through the positioning pin, and keep the connector 1 (16) and connector 2 (36) in the closed working state; Step 9: In the secondary component of the composite beam near the fixed end (32) of the beam end face, insert process compensation shims into the gaps between the working surface (5) on the flange side and the working surface (6) on the web side of the metal joint part (3) and the flange and web surfaces of the composite beam, respectively. The process compensation shims are determined according to the process requirements. Step 10: On the web surface of the secondary component-composite beam near the fixed end (32) of the beam end face, tighten the clamping device (14) to make the web surface of the secondary component-composite beam, the metal joint part (3), and the process compensation shim fit tightly together. Since the working surface of the support plate (40) is 3mm lower than the theoretical web surface of the composite beam, the secondary component-composite beam placed near the fixed end (32) of the beam end face is 3mm lower than the theoretical position. Tightening the clamping device (14) will cause the end face of the secondary component-composite beam near the fixed end (32) of the beam end face to rise continuously. It is possible that the end face of the secondary component-composite beam near the fixed end (32) of the beam end face will not fit with the end face working end two (33) in some places. It is necessary to use a rubber hammer non-metallic tool to act on the end face of the secondary component-composite beam to ensure that the end face of the secondary component-composite beam fits completely with the end face working end two (33) and finally reach the state where the clamping device (14) cannot be tightened. Step 11: Use the lateral clamp (15) to act on the edge surface of the secondary component - composite material beam near the fixed end (32) of the beam end face. This completes the positioning and fixing of the secondary component - composite material beam near the fixed end (32) of the beam end face. Step 12: According to the process requirements, give the axial dimension deviation L of the composite material sleeve beam, that is, the deviation between the axial dimension of the composite material sleeve beam required for actual assembly and the theoretical dimension, -5mm≤L≤5mm; In the adjustable end part, that is, the adjustable end (22) of the beam end face, when the positioning pin (30) is used for positioning, the initial distance between the working surface of the end face working end one (23) and the axial direction of one side end face of the composite material sleeve beam is 5mm. Step 13: In the secondary component - composite material beam near the fixed end of the beam end, insert a process compensation shim into the gap between the working surface (5) on the flange side and the working surface (6) on the web side of the metal joint part (3) and the flange and web surfaces of the composite material sleeve beam. The thickness of the process compensation shim is determined according to the process requirements. On the outer side of the web surface of the secondary component - composite material beam near the fixed end of the beam end, tighten the top clamp (14) so ​​that the inner side of the web surface of the composite material sleeve beam, the metal joint part (3), and the process compensation shim fit tightly together. Step 14: Use the lateral clamp (15) to act on the edge of the secondary component - composite material beam near the fixed end of the beam end. This completes the positioning and fixing of the secondary component - composite material beam near the fixed end of the beam end. Step 15: Install the drill jig (35) and use the lateral clamping device (15) to act on the edge surface of the composite material sleeve beam to ensure that the fitting part of the composite material sleeve beam fits tightly. Step 16: Drilling mold back plate 1 (18) is connected and fixed by connector 1 (16) and connector 2 (36); using a drilling tool: 90° angle air drill, drill along the metal joint bushing (4) to complete the drilling at the edge of the composite material fitting beam; after drilling, use high precision bolts (8) and nuts (9) to connect the metal joint drill bushing (4) and the edge of the composite material fitting beam, with the bolt head inside the inner surface of the edge of the composite material fitting beam and the nut inside the outer surface of the edge of the composite material fitting beam; Step 17: Use a feeler gauge to measure the gap between the flange outer surface plate (20) and the flange outer surface of the composite material fitting beam. Reserve a gap value of 2mm. Calculate the actual deviation of the flange outer surface of the composite material fitting beam based on the gap value measured by the feeler gauge. Step 18: Remove the positioning pin on the metal joint part (3), remove the lateral clamp (15), remove the clamp (14), remove the side of the connector one (16) and connector two (36) that are connected to the support (17), and keep connector one (16) and connector two (36) in the open state; pull out the positioning pin (30) of the fixed end (32) of the beam end, rotate the handle nut (26) to make the end face action end one (23) and end face action end two (33) move laterally away from the composite material sleeve beam, and disassemble the composite material sleeve beam from the assembly fixture and transfer it to the downstream assembly.

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