A tailor-welding tool for an overhang beam of an aviation ground service tractor

Abstract

This utility model discloses a welding fixture for cantilever beams of aviation ground support tractors, belonging to the field of aviation ground support tractors. It includes a base plate body, a V-shaped positioning mechanism, and a mandrel disc positioning mechanism. The base plate body is equipped with the V-shaped positioning mechanism and the mandrel disc positioning mechanism. The V-shaped positioning mechanism is located in the center of the base plate body, and a set of mandrel disc positioning mechanisms is provided on each of its left and right sides. The mandrel disc positioning mechanism includes a circular block disc positioning seat, and a disc positioning mandrel and a circular block positioning mandrel are provided on the circular block and disc positioning seat. The side wall of the circular block disc positioning seat is provided with a first section positioning seat and a second section positioning seat. A circular sleeve positioning seat is provided on the lower side of the V-shaped positioning mechanism. This utility model can realize standardized welding of cantilever beams, improve welding efficiency, and is suitable for large-scale production. It improves positioning accuracy, greatly increasing efficiency; and has strong scalability.

Description

Technical Field

[0001] This utility model relates to the field of aviation ground service tractors, specifically a welding fixture for cantilever beams of aviation ground service tractors. Background Technology

[0002] The primary function of aviation ground handling towing vehicles is to move aircraft within the airport, ensuring their safe movement and parking. When an aircraft needs to be moved to a boarding bridge, hangar, or parking position, the towing vehicle is responsible for moving the aircraft from its current location to the designated location. Since aircraft typically do not have reverse capabilities, towing vehicles are required for towing or pushing. Towing vehicles operate relatively smoothly during starting, acceleration, turning, and braking, effectively protecting components such as the aircraft's landing gear and ensuring aircraft safety. Through efficient scheduling and operation, towing vehicles can significantly improve the efficiency of airport ground operations.

[0003] As a key component of aviation ground support tractors, the cantilever beam has important structure and high welding strength requirements. If the assembly method of manual marking is adopted, the product assembly and welding efficiency will be low, the spot weld size consistency will be poor, and the labor intensity of employees will be high, which is not suitable for mass production. Utility Model Content

[0004] To address the aforementioned problems in the existing technology, this utility model aims to provide an efficient, batch welding fixture suitable for cantilever beams of aviation ground support vehicles. This welding fixture adopts a sectional positioning and manual mechanical locking method, which can obtain the best positioning accuracy, has relatively high efficiency, and has a simple structure and is easy to manufacture. Furthermore, this fixture can ensure the stability of the welding of cantilever beams of aviation ground support vehicles, thereby improving the consistency of the welding dimensions.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A welding fixture for cantilever beams of aviation ground support tractors includes a base plate body, a V-shaped positioning mechanism, and a mandrel disc positioning mechanism. The base plate body is equipped with the V-shaped positioning mechanism and the mandrel disc positioning mechanism. The V-shaped positioning mechanism is located in the center of the base plate body, and a set of mandrel disc positioning mechanisms is provided on each of its left and right sides. The mandrel disc positioning mechanism includes a circular block disc positioning seat, and a disc positioning mandrel and a circular block positioning mandrel are provided on the circular block and disc positioning seat. The side wall of the circular block disc positioning seat is provided with a first section positioning seat and a second section positioning seat. A circular sleeve positioning seat is provided on the lower side of the V-shaped positioning mechanism.

[0007] As a further embodiment of this utility model: the first section positioning seat and the second section positioning seat are both located on one side of the circular block / disc positioning seat.

[0008] As a further embodiment of this utility model: the first section positioning seat and the V-shaped positioning mechanism are distributed on different sides of the circular block / disc positioning seat.

[0009] As a further embodiment of this utility model, the V-shaped positioning mechanism is fixed to the center of the base plate body by bolts.

[0010] As a further embodiment of this utility model: the V-shaped positioning mechanism is provided with a V-shaped groove, and the V-shaped groove is inlaid with a hard alloy wear-resistant layer.

[0011] As a further embodiment of this utility model, the included angle of the V-groove in the V-shaped positioning mechanism is 90°±2°.

[0012] As a further embodiment of this utility model, the circular sleeve positioning seat has a built-in elastic bushing.

[0013] As a further embodiment of this utility model, the disc positioning mandrel and the block positioning mandrel are configured with a stepped shaft structure.

[0014] As a further embodiment of this utility model, both the first and second section positioning seats are equipped with clamping cylinders.

[0015] As a further aspect of this utility model, the base plate body is made of HT250 cast iron.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention enables standardized welding of cantilever beams, improving welding efficiency and making it suitable for large-scale production. Improved positioning accuracy: The V-shaped mechanism combined with the double mandrel minimizes the positional error of the cantilever beam assembly, allowing for one-time clamping of all components, reducing welding time and significantly improving efficiency. Furthermore, by replacing mandrels of different diameters, it can accommodate various cantilever beam models, offering strong scalability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a welding fixture for a cantilever beam of an aviation ground support tractor, as disclosed in an embodiment.

[0019] The attached figures are labeled as follows: 1-base plate body, 2-first section seat positioning seat, 3-second section seat positioning seat, 4-disc positioning mandrel, 5-circular block disc positioning seat, 6-circular block positioning mandrel, 7-circular sleeve positioning seat, 8-V-type positioning mechanism. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Please see Figure 1 A welding fixture for cantilever beams of aviation ground support tractors includes a base plate body 1, a V-shaped positioning mechanism 8, and a mandrel disc positioning mechanism; the base plate body 1 is provided with the V-shaped positioning mechanism 8 and the mandrel disc positioning mechanism.

[0023] The V-shaped positioning mechanism 8 is located in the center of the base plate body 1, and a set of mandrel disc positioning mechanisms is provided on each of the left and right sides of the V-shaped positioning mechanism 8.

[0024] The mandrel disc positioning mechanism includes a circular block disc positioning seat 5, a disc positioning mandrel 4 and a circular block positioning mandrel 6 on the circular block and disc positioning seat 5, and a first section positioning seat 2 and a second section positioning seat 3 on the side wall of the circular block disc positioning seat 5.

[0025] A circular sleeve positioning seat 7 is provided on the lower side of the V-shaped positioning mechanism 8;

[0026] The first section positioning seat 2 and the second section positioning seat 3 are both located on one side of the circular block / disc positioning seat 5;

[0027] The first section positioning seat 2 and the V-shaped positioning mechanism 8 are distributed on different sides of the circular block / disc positioning seat 5;

[0028] The base plate body 1 is a high-strength cast iron platform with a grid-like positioning reference line on its surface;

[0029] The V-shaped positioning mechanism 8 is fixed to the center of the base plate by bolts. Its V-groove angle is 90°±2°, and the groove is inlaid with a hard alloy wear-resistant layer. The bottom of the circular block positioning seat 5 is equipped with an adjusting slide groove, which can be finely adjusted laterally along the base plate. The circular disc positioning mandrel 4 and the circular block positioning mandrel 6 adopt a stepped shaft structure with a tolerance fit of H7 / g6. The first section positioning seat 2 and the second section positioning seat 3 are equipped with quick clamping cylinders. The circular sleeve positioning seat 7 has a built-in elastic bushing to accommodate sleeves of different diameters.

[0030] The base plate 1 serves as the reference platform for the entire tooling, providing rigid support and a mounting reference surface. Its surface must be machined into a high-precision plane to ensure the coplanarity of all positioning mechanisms; it typically features threaded holes or T-slots for fixing other adjustable mechanisms; and it is usually made of HT250 cast iron, which offers both shock absorption and stability.

[0031] The V-shaped positioning mechanism 8 performs rapid coarse positioning and clamping of the V-shaped main beam of the cantilever beam. Hard alloy lining plates are inlaid in the groove surface to prevent damage from welding spatter; a hydraulic or manual clamping device can be configured to provide vertical downward clamping force.

[0032] The circular block / disc positioning seat 5 integrates the dual positioning functions of a disc and a block, serving as a reference seat for mandrel installation. The base features a lateral adjustment groove to accommodate cantilever beams of varying lengths; an internal coaxiality calibration hole ensures the coaxiality of the disc and the mandrel. The disc-positioned mandrel 4 precisely constrains the radial position of the disc component at the end of the cantilever beam.

[0033] The circular positioning mandrel 6 secures the central circular block connector of the cantilever beam to prevent welding deformation. A tool relief groove is provided at the top for easy disassembly. The first-section positioning seat 2 and the second-section positioning seat 3 are used for axial positioning of the segmented support structure of the cantilever beam.

[0034] The circular sleeve positioning seat 7 is used to constrain the welding position of the bottom sleeve fitting of the cantilever beam. The base has a rotation adjustment function to accommodate sleeves with different inclination angles.

[0035] The main body of the cantilever beam welding fixture is assembled through welding, machining, and processing. Positioning seats, positioning mandrels, and other parts are installed onto their respective mechanisms. During welding, the cantilever beam connecting plate is placed on the positioning plate, followed by the placement of bushings and joint seats for assembly. Then, round blocks and discs are placed, and the positioning mandrel is positioned before welding. This completes the cantilever beam welding process.

[0036] This invention enables standardized welding of cantilever beams, improving welding efficiency and making it suitable for large-scale production. Positioning accuracy is enhanced; the V-shaped mechanism and double mandrel work together to minimize positional errors in the cantilever beam assembly. All components are positioned in a single clamping operation, reducing welding time and significantly improving efficiency. Furthermore, by replacing mandrels of different diameters, it can be adapted to various cantilever beam models, offering strong scalability.

[0037] This utility model aims to provide an efficient, batch welding fixture suitable for cantilever beams of aviation ground support vehicles. The welding fixture adopts a sectional positioning and manual mechanical locking method, which can obtain the best positioning accuracy, has relatively high efficiency, and has a simple structure and is easy to manufacture. Furthermore, the fixture can ensure the stability of the welding of cantilever beams of aviation ground support vehicles, thereby improving the consistency of the welding dimensions.

[0038] This invention addresses the structural characteristics of the cantilever beam by designing a simple, easy-to-use, and flexibly adjustable welding fixture. Using this fixture can improve the welding efficiency of the workpiece and ensure the consistency of the welded dimensions, thereby guaranteeing product quality.

[0039] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and not restrictive in all respects. The scope of this invention is defined by the appended claims rather than the foregoing description, and therefore all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A welding fixture for cantilever beams of aviation ground support tractors, characterized in that, The system includes a base plate body (1), a V-shaped positioning mechanism (8), and a mandrel disc positioning mechanism. The base plate body (1) is provided with a V-shaped positioning mechanism (8) and a mandrel disc positioning mechanism. The V-shaped positioning mechanism (8) is located in the center of the base plate body (1), and a set of mandrel disc positioning mechanisms is provided on each of the left and right sides of the V-shaped positioning mechanism (8). The mandrel disc positioning mechanism includes a circular block disc positioning seat (5), and a disc positioning mandrel (4) and a circular block positioning mandrel (6) are provided on the circular block and disc positioning seat (5). The side wall of the circular block disc positioning seat (5) is provided with a first section positioning seat (2) and a second section positioning seat (3). A circular sleeve positioning seat (7) is provided on the lower side of the V-shaped positioning mechanism (8).

2. The welding fixture for cantilever beams of aviation ground support tractors according to claim 1, characterized in that, The first section positioning seat (2) and the second section positioning seat (3) are both located on one side of the circular block / disc positioning seat (5).

3. The welding fixture for cantilever beams of aviation ground support vehicles according to claim 2, characterized in that, The first section positioning seat (2) and the V-shaped positioning mechanism (8) are distributed on different sides of the circular block and disc positioning seat (5).

4. The welding fixture for cantilever beams of aviation ground support vehicles according to claim 3, characterized in that, The V-shaped positioning mechanism (8) is fixed to the center of the base plate body (1) by bolts.

5. The welding fixture for cantilever beams of aviation ground support vehicles according to claim 4, characterized in that, The V-shaped positioning mechanism (8) is provided with a V-shaped groove angle, and the V-shaped groove angle is inlaid with a hard alloy wear-resistant layer.

6. The welding fixture for cantilever beams of aviation ground support vehicles according to claim 5, characterized in that, The included angle of the V-groove in the V-shaped positioning mechanism (8) is 90°±2°.

7. The welding fixture for cantilever beams of aviation ground support tractors according to claim 6, characterized in that, The circular sleeve positioning seat (7) has a built-in elastic bushing.

8. The welding fixture for cantilever beams of aviation ground support tractors according to claim 7, characterized in that, The disc positioning mandrel (4) and the block positioning mandrel (6) are configured with a stepped shaft structure.

9. A welding fixture for cantilever beams of aviation ground support vehicles according to claim 8, characterized in that, Both the first section positioning seat (2) and the second section positioning seat (3) are equipped with clamping cylinders.

10. A welding fixture for a cantilever beam of an aviation ground support tractor according to claim 9, characterized in that, The base plate body (1) is made of HT250 cast iron.

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