Grid fin welding fixture

Abstract

The utility model discloses a girdle rudder welding tool is designed for the problem of low welding precision and low efficiency of rocket girdle rudder. In the aspect of tooling, the support frame adopts the "H" shaped steel reinforcing rib structure, which is high in strength and stable; the side-mounted fixed plate is vertically arranged to provide lateral support, and cooperates with the connecting column and the buckling plate to realize accurate positioning of the girdle rudder in the horizontal and vertical directions; the infrared calibration device can accurately measure position information; the reinforcing plate, the butt joint plate and the gasket plate enhance the structural stability and protect the girdle rudder. During work, the girdle rudder is pre-assembled on the flexible platform first, then is transferred to the tooling for re-inspection and fixation, finally is hoisted and supported by the support frame for welding, and the direction can be adjusted to weld each part. The tooling and method effectively solve the drawbacks of traditional welding, provide stable support and accurate positioning for the girdle rudder, improve the welding precision and quality, are convenient to operate, significantly improve the welding efficiency, save cost, and are of great significance for rocket recovery.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to welding fixtures for grid rudders. Background Technology

[0002] Rocket grid fins are attitude control devices for rockets, playing a crucial role in ensuring precise landing during rocket recovery. They control the rocket's attitude during recovery, ensuring that debris lands in a designated area. During manufacturing, due to the large size and weight of rocket grid fins, and the requirement for extremely high precision, ground-based operations are currently employed without corresponding welding fixtures. This results in poor precision during welding, necessitating multiple repetitive machining and correction processes, severely impacting work efficiency. Specifically: traditional ground-based welding of grid fins makes it difficult to fix the welded areas, and there are no reference points for unwelded sections, leading to low welding precision. Furthermore, due to the large size of the grid fins, traditional ground welding cannot weld the central portion. Therefore, other parts must be welded before hoisting the grid fins. Direct hoisting of the grid fins requires waiting for them to fully set (which takes a long time), and the hoisting process itself can cause deformation, affecting precision. Even when hoisted, the grid fins are prone to swaying, further hindering high-precision welding.

[0003] Therefore, we propose a grid rudder welding fixture. Utility Model Content

[0004] To address the shortcomings of existing production technologies, the applicant provides a grid rudder welding fixture, which achieves multiple beneficial effects through a carefully designed structure. The support frame, side mounting plate, connecting columns, and other components together constitute a stable and precise positioning support system, while the infrared calibration device further enhances positioning accuracy, effectively solving the welding precision problem.

[0005] The technical solution adopted in this utility model is as follows:

[0006] Grid rudder welding fixture, including:

[0007] Support frame, which is used to support the grid rudder body;

[0008] Side-mounted fixing plates are vertically installed on at least three sides of the support frame, and there are multiple side-mounted fixing plates on each side. One end of the side-mounted fixing plate extends out of the support frame to support the side wall of the grid rudder body.

[0009] The reinforcing plate is fixedly connected to the side-mounted fixing plate;

[0010] There are multiple connecting columns, and two columns are arranged as a group. At least two groups are provided on the end face of the support frame.

[0011] In one embodiment, the support frame includes a frame, and the frame is provided with crisscrossing longitudinal and transverse reinforcing ribs.

[0012] In one embodiment, the side mounting plate is provided on three sides of the frame, and two buckles for engaging the grid rudder body are connected to the side end face of the frame where the side mounting plate is not provided.

[0013] An infrared calibration device is provided on the side-mounted fixing plate.

[0014] In one embodiment, the spacing between two connecting posts in the same group is infinitely close to the thickness of the grid rudder body frame.

[0015] In one embodiment, the height of the connecting post is infinitely close to the height of the grid rudder body, and the top of the two connecting posts in the same group are provided with buckles to limit the height of the grid rudder body.

[0016] In one embodiment, a mating plate is connected between the side-mounted fixing plates located in the middle of the side of the support frame.

[0017] In one embodiment, a detachable bolt structure is inserted into the reinforcing plate, and the bolt structure passes through a pre-set through hole on the grid rudder and positions the grid rudder body.

[0018] In one embodiment, a pad that mates with the bolt structure is also provided on the inner wall of the grid rudder body.

[0019] In one embodiment, four sets of connecting posts are provided, and multiple sets of connecting posts are located at the corners of the grid rudder.

[0020] A grid rudder welding method, which uses the above-mentioned welding fixture, includes the following steps:

[0021] S1. On a flexible platform, pre-assembly is achieved by spot welding the frame of the grid rudder body and its corresponding grid pieces.

[0022] S2. Transfer the pre-assembled grid fins to the support frame and re-inspect the grid fin body's diagonal, flatness, and dimensions.

[0023] S3. After the re-inspection is completed, fix it by fastening the grid rudder body to the buckle, and at the same time, fasten the frame of the grid rudder body between the two connecting columns in the same group, then use the buckle plate for positioning, and then fix the side of the grid rudder body with bolts.

[0024] S4. After fixing, the support frame is hoisted so that the side mounting plate faces downward to support the whole, and the vertical welding is achieved. After one side of the grid rudder body is welded, the direction of the support frame can be changed to weld the other side of the grid rudder.

[0025] The beneficial effects of this utility model are as follows:

[0026] This utility model features a compact and reasonable structure, and is easy to operate. Its carefully designed structure achieves numerous beneficial effects. The support frame, side-mounted fixing plate, connecting columns, and other components together form a stable and precise positioning support system. The infrared calibration device further improves positioning accuracy, effectively solving the welding precision problem. The support frame design for standing welding and adjustable orientation, combined with the convenient fixing method of buckles and bolts, greatly improves operational convenience and welding efficiency. Components such as reinforcing plates, butt plates, and pads enhance the structural stability of the tooling while protecting the grid rudder, ensuring welding reliability.

[0027] In addition, this utility model also has the following advantages:

[0028] In this embodiment, the grid rudder welding fixture provides high-precision positioning and stable support for the grid rudder through the coordinated action of components such as the support frame, side mounting plates, and connecting columns. The support frame adopts an "I"-shaped steel structure with a frame combined with longitudinal and transverse reinforcing ribs, which has high strength and good stability, can withstand the weight of the grid rudder, and does not deform during welding, providing a stable platform for welding. The side mounting plates are vertically set on the side of the support frame to support the sidewall of the grid rudder and restrict its lateral movement. The spacing of the connecting columns is close to the thickness of the frame of the grid rudder body, achieving precise horizontal positioning, and the fastening plates restrict vertical movement. At the same time, the infrared calibration device can accurately measure the grid rudder's position information to ensure accurate placement, effectively solving the problem of low precision in traditional ground welding and greatly improving the welding quality.

[0029] The tooling design fully considers operator convenience, improving welding efficiency. After fixing, the support frame is hoisted so that the side mounting plate faces downwards, allowing operators to stand while welding, reducing operational difficulty. Once one side is welded, the support frame direction can be easily reversed to weld other parts of the grid fin without requiring frequent operator repositioning or adjustments to the grid fin's attitude. Furthermore, the snap-fit ​​design allows for quick initial fixing of the grid fin, the bolt structure further enhances the fixing effect, and the detachable design facilitates subsequent processing, reducing repetitive machining and correction steps, saving time and costs, and significantly improving welding efficiency.

[0030] The fixture has a robust overall structure, and the coordinated operation of its components ensures reliable welding. Reinforcing plates enhance the structural strength of the side-mounted fixing plates, preventing deformation under pressure during welding and ensuring effective support for the grid fins. The mating plate connects the side-mounted fixing plates, distributing the pressure from the grid fins and preventing excessive localized deformation. The backing plate increases the contact area between the bolt structure and the grid fins, distributing pressure, preventing localized damage, and improving the stability of the bolt fixation. These design features ensure the stability of the fixture during welding, thereby guaranteeing the reliability of the grid fin welding. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model.

[0032] Figure 2 for Figure 1 The left view.

[0033] Figure 3 for Figure 1 Sectional view along the AA direction.

[0034] Figure 4 This is a schematic diagram of the assembly structure of the welding fixture and the grid rudder in this utility model.

[0035] Figure 5 for Figure 4 A magnified view of part B in the middle.

[0036] in:

[0037] 10. Support frame; 11. Side mounting plate; 12. Butt joint plate; 13. Reinforcing plate; 14. Connecting column; 15. Bolted structure; 20. Grid rudder body;

[0038] 100. Frame; 1001. Buckle; 101. Vertical reinforcing rib; 102. Horizontal reinforcing rib; 1401. Buckle plate; 1501. Pad plate. Detailed Implementation

[0039] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0040] like Figures 1-5 As shown, this embodiment discloses a grid rudder welding fixture, which mainly consists of a support frame 10, a side mounting plate 11, a reinforcing plate 13, a connecting column 14, a mating plate 12, a buckle 1001, a bolt structure 15, and a pad 1501. These components cooperate to provide stable and precise support and positioning for the welding of the grid rudder, ensuring high precision and efficiency in the welding process. (The components work together to provide stable and precise support and positioning for the welding of the grid rudder body 20, ensuring high precision and efficiency in the welding process.)

[0041] Specifically, such as Figures 1-4 As shown, the support frame 10 in this embodiment plays a crucial role in supporting the grid rudder body 20. It consists of a frame 100 and longitudinal reinforcing ribs 101 and transverse reinforcing ribs 102 arranged within the frame 100. Both the longitudinal reinforcing ribs 101 and the transverse reinforcing ribs 102 are made of I-beams, which have high strength and stability, effectively bearing the weight of the grid rudder body 20 and maintaining the overall shape of the fixture without deformation during welding, providing a stable platform for welding.

[0042] like Figures 1-3 As shown, in this embodiment, the side-mounted fixing plates 11 are vertically arranged on at least three sides of the support frame 10, and there are multiple side-mounted fixing plates on each side. One end of the side-mounted fixing plate 11 extends out of the support frame 10, and its function is to support the side wall of the grid rudder body 20. In this embodiment, the side-mounted fixing plates 11 are arranged on three sides of the frame 100, and two buckles 1001 for engaging the grid rudder body 20 are connected to the end face of the frame without side-mounted fixing plates, and this side frame is the main hoisting side. The design of the side-mounted fixing plates 11 not only provides lateral support for the grid rudder body 20, but also restricts the lateral movement of the grid rudder body 20 during welding, ensuring the accuracy of the welding position. The vertical arrangement of the side-mounted fixing plates can maximize their supporting function, and the distribution of multiple side-mounted fixing plates can evenly distribute the pressure on the side wall of the grid rudder body 20. During the welding process, the grid rudder body 20 may have a slight displacement tendency due to factors such as thermal stress. The side-mounted fixing plate prevents this displacement from occurring, ensuring that the welding position remains accurate at all times.

[0043] Furthermore, the side-mounted fixing plate 11 is a "C"-shaped steel structure. The "C"-shaped steel possesses good mechanical properties and stability, meeting the requirements for supporting the sidewalls of the grid rudder body 20. Simultaneously, an infrared calibration device can be installed on the side-mounted fixing plate 11. This infrared calibration device plays a crucial role in the welding process. It can accurately measure the position information of the grid rudder body 20 by emitting infrared rays, achieving precise positioning of the grid rudder body 20 during welding. For example, after placing the grid rudder body 20 on the tooling, the infrared calibration device can quickly and accurately detect parameters such as the diagonal length, flatness, and overall dimensions of the grid rudder body 20, comparing these parameters with preset standard values. This allows for timely detection of whether the grid rudder body 20 is accurately positioned, providing reliable assurance for subsequent welding work. Utilizing the characteristics of infrared light, the infrared calibration device can perform accurate measurements without contacting the grid rudder body 20, avoiding potential damage to the grid rudder body 20 caused by traditional measurement methods. By monitoring the position information of the grid rudder body 20 in real time, welding parameters and processes can be adjusted in a timely manner to ensure the consistency and stability of welding quality.

[0044] like Figure 1 and Figure 2 As shown, in this embodiment, the reinforcing plate 13 is fixedly connected to the side-mounted fixing plate 11. The main function of the reinforcing plate 13 is to enhance the structural strength of the side-mounted fixing plate 11 and prevent it from deforming under the pressure of the grid rudder body 20 during welding. The reinforcing plate 13 improves the stability and reliability of the entire tooling, ensuring that the grid rudder body 20 maintains a stable position during welding. By increasing the thickness and strength of the side-mounted fixing plate, it can withstand greater pressure. During welding, the weight of the grid rudder body 20 and the welding stress exert a significant force on the side-mounted fixing plate. Without the reinforcement of the reinforcing plate, the side-mounted fixing plate may bend or deform, affecting the positioning accuracy of the grid rudder body 20. The presence of the reinforcing plate effectively solves this problem and ensures the stability of the welding process.

[0045] like Figure 1 , Figure 3 as well as Figure 5As shown, in this embodiment, there are multiple connecting posts 14, arranged in pairs. At least two sets of connecting posts 14 are provided on the end face of the support frame 10. In this embodiment, four sets of connecting posts 14 are provided, with multiple sets of connecting posts 14 located at the corners of the grid rudder body 20. The spacing between two connecting posts 14 in the same group is infinitely close to the thickness of the frame of the grid rudder body 20. This design allows the frame of the grid rudder body 20 to be tightly engaged between the two connecting posts 14 in the same group, achieving precise horizontal positioning of the grid rudder body 20. The corners of the grid rudder body 20 are critical structural parts; placing connecting posts at these locations allows for better control of the horizontal position of the grid rudder body 20. The tight engagement reduces horizontal swaying of the grid rudder body 20, making its position more stable during welding and thus improving welding accuracy.

[0046] Meanwhile, the height of the connecting post 14 is very close to the height of the grid rudder body 20, and the tops of the two connecting posts 14 in the same group are equipped with buckles 1401 to limit the height of the grid rudder body 20. The buckles 1401 restrict the vertical movement of the grid rudder body 20. After the frame of the grid rudder body 20 is engaged between the two connecting posts 14 in the same group, the buckles 1401 are installed on the tops of the connecting posts 14. This effectively prevents the grid rudder body 20 from shaking up and down due to external forces during welding, further ensuring the welding accuracy. The height of the connecting posts is designed to match the height of the grid rudder body 20, ensuring effective vertical limitation of the grid rudder body 20. The use of buckles is a simple and effective fixing method. By covering the top of the connecting posts, it forms a closed limiting space, preventing the grid rudder body 20 from jumping in the vertical direction. This design ensures that the height of the grid rudder body 20 remains consistent during welding, making the welding quality more reliable.

[0047] like Figures 1-3 As shown, a mating plate 12 connects the side-mounted fixing plates 11 located in the middle of the side of the support frame 10. The mating plate 12 also adopts a "C"-shaped steel structure, which can enhance the connection strength between the side-mounted fixing plates 11, making the entire fixture structure more stable. During the welding process, the presence of the mating plate 12 can effectively disperse the pressure exerted by the grid rudder body 20 on the side-mounted fixing plates 11, preventing the side-mounted fixing plates 11 from deforming due to excessive local stress, thereby ensuring the overall stability and reliability of the welding fixture. The mating plate connects the various side-mounted fixing plates into a whole. During the welding process of the grid rudder body 20, the side-mounted fixing plates will be subjected to huge pressure from the grid rudder body 20. Without the reinforcement of the mating plate, the side-mounted fixing plates may deform locally, affecting the positioning accuracy of the grid rudder body 20. By dispersing the pressure, the mating plate enables the side-mounted fixing plates to share the pressure, improving the overall strength and stability of the fixture.

[0048] like Figure 5 As shown, in this embodiment, the snap-fit ​​1001 is connected to the side end face of the frame 100 where the side mounting plate 11 is not provided, and its function is to snap the grid rudder body 20. When the grid rudder body 20 is placed on the fixture, it is first snapped onto the snap-fit ​​1001. Through the snap-fit ​​action of the snap-fit ​​1001, the grid rudder body 20 can be quickly and accurately initially fixed on the fixture, preparing for subsequent precise fixing and welding work. Utilizing the elasticity or mechanical structure of the snap-fit, the grid rudder body 20 can be quickly fixed on the fixture. This initial fixing method not only saves time but also ensures that the grid rudder body 20 will not undergo significant displacement during the subsequent fixing process, providing convenience for precise fixing. At the same time, the snap-fit ​​has a simple structure, is easy to operate, and can improve work efficiency.

[0049] like Figure 2 and Figure 5 As shown, in this embodiment, a detachable bolt structure 15 is inserted into the reinforcing plate 13, and the bolt structure 15 passes through a pre-set through hole on the grid rudder body 20 to position the grid rudder body 20. After the grid rudder body 20 is placed on the fixture and initially fixed, the bolt structure 15 is passed through the through hole on the grid rudder body 20 and the bolt is tightened to make the grid rudder body 20 tightly connected to the fixture. The bolt structure 15 can further enhance the fixing effect of the grid rudder body 20 on the fixture, prevent the grid rudder body 20 from moving during the welding process, and ensure the accuracy and quality of the welding. The bolt structure can provide strong fixing force through the interlocking of the threads. In the welding fixture of the grid rudder body 20, the bolt structure and the reinforcing plate work together to firmly fix the grid rudder body 20 to the fixture. The detachable design allows the bolts to be easily removed after welding for subsequent processing of the grid rudder body 20. Meanwhile, the high precision of the bolt structure ensures the accurate positioning of the grid rudder body 20 on the tooling, thus improving the welding quality.

[0050] like Figure 5As shown, in this embodiment, a pad 1501 that abuts against the bolt structure 15 is also provided on the inner wall of the grid rudder body 20. The function of the pad 1501 is to increase the contact area between the bolt structure 15 and the grid rudder body 20, disperse the pressure exerted by the bolt on the grid rudder body 20, and avoid damage to the grid rudder body 20 due to excessive local pressure. At the same time, the pad 1501 can also improve the stability of bolt fixing, ensuring that the grid rudder body 20 always maintains a stable position during the welding process. The pad increases the contact area, distributing the pressure exerted by the bolt evenly to the surface of the grid rudder body 20. During the welding process, the fixing force of the bolt may cause local damage to the grid rudder body 20, and the presence of the pad can effectively avoid this situation. At the same time, the pad can also increase the friction between the bolt and the grid rudder body 20, improve the stability of bolt fixing, and ensure that the grid rudder body 20 will not shift due to bolt loosening during the welding process.

[0051] The specific working principle in this embodiment is as follows:

[0052] When welding using the welding fixture for the grid rudder body 20, the pre-assembled grid rudder body 20 is first placed on the support frame 10. The diagonal, flatness, and dimensions of the grid rudder body 20 are then checked using an infrared calibration device to ensure accurate placement. Next, the grid rudder body 20 is snapped onto the clip 1001 for initial fixation. Then, the frame of the grid rudder body 20 is snapped between the two connecting posts 14 in the same group, and a clip plate 1401 is installed at the top of the connecting post 14 to limit the height of the grid rudder body 20. Finally, the bolt structure 15 is passed through the through holes on the frame of the grid rudder body 20 and the bolts are tightened to ensure a tight connection between the grid rudder body 20 and the fixture, completing the fixation of the grid rudder body 20 on the fixture.

[0053] After fixing, the support frame 10 is hoisted so that the side mounting plate 11 faces downwards to support the entire assembly. During hoisting, care must be taken to maintain the balance of the fixture to prevent it from tipping over. At this point, the operator can stand and perform welding work. Because the fixture provides stable and precise support and positioning for the grid rudder body 20, the operator can perform welding more conveniently and accurately. After welding on one side is completed, the direction of the support frame 10 can be reversed, making it easier to weld other parts of the grid rudder body 20, greatly improving welding efficiency and quality.

[0054] This welding fixture for the grid rudder body 20 offers numerous advantages and significant benefits. Firstly, the precise design and coordination of components such as the support frame 10, side-mounted fixing plate 11, and connecting column 14 provide stable and accurate support and positioning for the grid rudder body 20, effectively solving the problem of low welding precision in traditional ground welding methods and greatly improving welding quality. Secondly, the fixture's design allows operators to perform welding while standing, and the direction of the support frame 10 can be easily changed during the welding process to weld various parts of the grid rudder body 20, improving welding efficiency, reducing repetitive processing and correction steps, and saving time and costs. Furthermore, the infrared calibration device installed on the fixture can monitor the position information of the grid rudder body 20 in real time, ensuring precise positioning during the welding process and further improving welding accuracy and reliability.

[0055] In summary, this welding fixture for the grid fin body 20 provides an efficient and precise solution for welding the rocket grid fin body 20, which is of great significance for improving the quality and efficiency of rocket recovery.

Claims

1. A gudgeon welding fixture, characterized in that, Including: Support frame for supporting the grid rudder body; Side-mounted fixing plate vertically arranged on at least three sides of the support frame, and the number of side-mounted fixing plates on each side is multiple, one end of the side-mounted fixing plate extends out of the support frame, and the side-mounted fixing plate is used for supporting the side wall of the grid rudder body; The reinforcing plate is fixedly connected to the side-mounted fixing plate; The connecting column is multiple, and two are a group, and at least two groups are arranged on the end surface of the support frame.

2. The lattice rudder welding fixture of claim 1, wherein: The support frame comprises a frame, and longitudinal reinforcing ribs and transverse reinforcing ribs are arranged in the frame.

3. The lattice rudder welding fixture of claim 2, wherein: The side-mounted fixing plate is arranged on three sides of the frame, and two buckles for clamping the grid rudder body are connected to the end surface of the frame without the side-mounted fixing plate. The side-mounted fixing plate is provided with an infrared calibration device.

4. The lattice rudder welding fixture of claim 1, wherein: The distance between the two connecting columns in the same group is infinitely close to the thickness of the frame of the grid rudder body.

5. The lattice rudder welding fixture of claim 4, wherein: The height of the connecting column is infinitely close to the height of the grid rudder body, and the top end of the two connecting columns in the same group is provided with a buckling plate for limiting the height of the grid rudder body.

6. The lattice rudder welding fixture of claim 1, wherein: The side-mounted fixing plates located in the middle of the side edges of the support frame are connected by a butt plate.

7. The lattice rudder welding fixture of claim 1, wherein: The reinforcing plate is inserted with a detachable bolt structure, and the bolt structure passes through the through hole prearranged on the grid rudder, and the bolt structure is used for positioning the grid rudder body.

8. The lattice rudder welding fixture of claim 7, wherein: The inner wall of the grid rudder body is also provided with a gasket plate matched with the bolt structure.

9. The lattice rudder welding fixture of claim 4, wherein: The connecting column is provided with four groups, and the multiple connecting columns are respectively located at the corners of the grid rudder.

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