A high-speed train aluminum alloy car body repairing and welding device

Abstract

The present application belongs to the field of non-ferrous metal processing and manufacturing equipment, and proposes a high-speed train aluminum alloy car body repair welding device, which comprises a wheel setting machine, a welding gun and aluminum alloy welding material. The aluminum alloy welding material is used to form a profiling pad matching the shape of the car body crack through cutting. A welding gun support tool is arranged on the handle of the welding gun. Two connecting rods of the welding gun support tool are each provided with a positioning suction cup assembly. At least one of the two sets of positioning suction cup assemblies is connected with the glass window of the high-speed train. The profiling pad is connected with a pad clamping tool. The present application provides the whole profiling pad as a permanent pad for fusion welding on the inner side of the car body, which is beneficial to improve the welding quality. The positioning suction cup assembly can position the welding gun support tool, and the welding gun support tool provides support for the welding gun near the car body crack. On the basis of ensuring the welding path, the worker can flexibly switch the pad clamping tool and the welding gun under the condition of being away from the ground.

Description

Technical Field

[0001] This invention belongs to the field of non-ferrous metal processing and manufacturing equipment, and particularly relates to a high-speed train aluminum alloy car body repair and welding device. Background Technology

[0002] 6000 series Al-Mg-Si alloys, such as 6005A and 6082, have excellent extrusion properties, making them suitable for producing ultra-long, multi-cavity hollow profiles up to 25m in length. This enables modular, integrated molding of the roof, side walls, and floor, significantly reducing the number of parts and welding joints. 6082 aluminum alloy substrates are specifically designed for welding repair of high-speed train bodies and key structural components. To meet the service requirements of high-speed train welding repair, the 6082 aluminum alloy composition includes Si (1.05-1.09%), Mg (0.85-0.90%), Mn (0.59-0.67%), and Cr (0.14-0.17%) within an optimal range, forming stable strengthening phases to enhance strength. Strict control of impurities such as Cu (≤0.07%) and Fe (≤0.22%) reduces welding crack sensitivity, creating a leading customized composition system. For short cracks (≤150mm) in high-speed train bodies, in-situ welding is used; for ultra-long cracks (>300mm), the profile is replaced. The mainstream form (accounting for more than 80% of repairable cracks) is a single starting point, an approximately straight line, a weakly wavy continuous main crack with no large number of branches. The next most common form is an arc-shaped / shallow parabolic crack, which is often seen on curved profiles (roof arc, underframe arc transition area), and deflects gently with the curvature of the profile surface.

[0003] Currently, in the process of repairing short cracks in situ, non-backing plate full penetration welding is generally used: the molten pool is unrestrained, the weld has greater freedom in cooling and shrinking, the root formation is poorly controllable, and root defects are prone to occur. Moreover, full penetration welding requires precise matching of current, wire feed speed, travel speed, and arc height. Even slight fluctuations can lead to burn-through or incomplete penetration. In addition, crack repair, grinding, and excavation will reduce the thickness and widen the gap to varying degrees, making it difficult to guarantee the welding quality of direct full penetration welding. Secondly, it is inconvenient for workers to adjust the welding fixtures and welding jigs when holding the welding gun, especially when performing welding operations at a high position on the vehicle body while standing on a lift. Furthermore, the welding gun lacks support, which requires a high level of welding skill from the workers. Summary of the Invention

[0004] This invention addresses the aforementioned technical problems in the repair and welding of train car bodies by proposing a high-speed train aluminum alloy car body repair and welding device that is rationally designed, provides a pad clamping fixture and a welding torch support fixture, improves welding quality, and is easy to operate off the ground.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The present invention provides a high-speed train aluminum alloy car body repair and welding device, including a car jacking machine and a welding torch, and also includes aluminum alloy welding material of the same material as the high-speed train aluminum alloy car body. The aluminum alloy welding material includes a plate and a column array disposed on the plate. The column array includes multiple aluminum columns. The aluminum alloy welding material is used to form a contour pad matching the shape of the car body crack by cutting. The lifting end of the car jacking machine is provided with a protective basket connected to it by bolts. The handle of the welding torch is provided with a welding torch support fixture. The welding torch support fixture includes a universal rod, which is slidably disposed on a transverse rod. The transverse rod is slidably disposed on a support plate. The support plate is provided with two symmetrically distributed connecting rods. A positioning suction cup assembly is provided at one end of the connecting rod away from the support plate. At least one of the two positioning suction cup assemblies is connected to the glass window of the high-speed train. A welding window is provided in the middle of the support plate, and a pad clamping fixture connected to the contour pad is provided opposite the welding window.

[0006] Preferably, the pad clamping fixture includes a clamping roller, the center of which is provided with a clamping hole for connecting to the aluminum column, and a pair of clamping bolts and a pair of connecting holes symmetrically distributed about the clamping hole. A push rod is provided in the connecting hole, and a clamping suction cup is provided at the end of the push rod.

[0007] Preferably, the clamping roller includes a plate-shaped section and a T-shaped circular roller section connected to the plate-shaped section. The cylindrical surface of the circular roller section is used to contact the surface of the vehicle body to be welded. The clamping roller is provided with an integral clamping adjustment gap that runs through the plate-shaped section and the circular roller section. The clamping suction cup is provided in the right-angle opening formed by the end of the circular roller section and the plate surface of the plate-shaped section.

[0008] Preferably, the positioning suction cup assembly includes a suction cup cover, which includes a circular cover section and a T-shaped groove communicating with the circular cover section. The end of the T-shaped groove away from the circular cover section is an arc-shaped structure, and the arc-shaped structure is concentric with the circular cover section. A main suction cup is provided inside the circular cover section. Two symmetrically distributed flexible strips are provided in the T-shaped groove. One flexible strip has an inner buckle at its end, and the other flexible strip has an outer buckle at its end that cooperates with the inner buckle. Multiple suction cup mounting slots are provided on the flexible strips along their length direction, and auxiliary suction cups are provided in the suction cup mounting slots.

[0009] Preferably, the flexible strip has multiple sets of staggered deformable teeth on its front and back sides, and multiple concave openings that are integrally connected and communicate with the suction cup mounting groove inside the flexible strip. The auxiliary suction cup has a rectangular groove structure with an H-shaped longitudinal section. The side of the auxiliary suction cup is in frictional engagement with the groove surface of the suction cup mounting groove. The inner side of the auxiliary suction cup has a dovetail protrusion that slides and limits the concave opening. The end of the flexible strip is provided with a one-way exhaust valve.

[0010] Preferably, a suction cup support is provided at the center of the concave opening, and a limiting rod that telescopically cooperates with the suction cup support is provided at the center of the secondary suction cup.

[0011] Preferably, the suction cup cover has a clamping bolt at its center, which engages with a slotted hole on the connecting rod.

[0012] Preferably, the welding torch support fixture is provided with three buffer suction cups arranged in a triangular pattern, wherein two of the buffer suction cups are coaxially connected to two connecting rods in a one-to-one correspondence.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0014] 1. The pad clamping fixture provided by the present invention can clamp the contour pad and can be removed in real time. The aluminum pillar on the contour pad can be used as a spot welding node, so that the contour pad as a whole is permanently welded to the inside of the vehicle body, which can improve the welding quality.

[0015] 2. The positioning suction cup assembly provided by the present invention can position the welding gun support fixture, and the glass window is used as the adsorption base, which is conducive to improving the reliability of the positioning node; the welding gun support fixture provides support for the welding gun near the crack in the vehicle body, and while ensuring the welding path, it is convenient for workers to flexibly switch the operating pad clamping fixture and welding gun under the condition of being off the ground.

[0016] 3. The protective basket provided by the present invention can be used as a lifting platform. The lifting driving force and supporting plane are provided by the car lifting machine, which makes it convenient for workers to perform welding operations on cracks at different heights on the car body, especially when the car body is lifted by other car lifting machines. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a high-speed train aluminum alloy car body repair and welding device provided in an embodiment;

[0019] Figure 2 This is a schematic diagram illustrating the interaction between a high-speed train aluminum alloy car body repair and welding device and cracks of different heights and directions on the car body, as provided in the embodiment.

[0020] Figure 3 A perspective view of the welding torch, the contour pad, the welding torch support fixture, the positioning suction cup assembly, and the pad clamping fixture;

[0021] Figure 4 Rear view of the welding torch, contour pad, welding torch support fixture, positioning suction cup assembly, and pad clamping fixture;

[0022] Figure 5 for Figure 4 Cross-sectional view of the center positioning suction cup assembly along the GG direction;

[0023] Figure 6 for Figure 4 Cross-sectional view of the center positioning suction cup assembly along the EE direction;

[0024] Figure 7 Exploded view of the positioning suction cup assembly;

[0025] Figure 8 A perspective view of the contour pad and pad clamping fixture provided in the embodiment;

[0026] Figure 9 The front view of the contour pad and pad clamping fixture provided in the embodiment;

[0027] Figure 10 for Figure 9 A cross-sectional view of the central contour pad and the pad clamping fixture in the FF direction;

[0028] Figure 11 A perspective view of the aluminum alloy welding material provided in the embodiment;

[0029] Figure 12 A perspective view of the protective basket provided for an embodiment;

[0030] In the above figures: 1. Vehicle body; 2. Car jack; 3. Welding torch; 4. Aluminum alloy welding material; 41. Plate; 42. Column array; 5. Contouring pad; 6. Protective basket; 7. Welding torch support fixture; 71. Universal rod; 72. Horizontal rod; 73. Support plate; 74. Connecting rod; 75. Welding window; 76. Waist-shaped hole; 77. Buffer suction cup; 8. Positioning suction cup assembly; 81. Suction cup cover; 811. Round cover section; 812. T-slot; 82. Main suction cup; 83. Flexible belt; 8 31. Inner buckle body; 832. Outer buckle body; 833. Suction cup mounting groove; 834. Deformed toothed opening; 835. Concave opening; 84. Secondary suction cup; 841. Dovetail protrusion; 842. Limiting rod; 85. One-way exhaust valve; 86. Suction cup support column; 87. Clamping bolt; 9. Pad clamping fixture; 91. Clamping roller; 911. Plate section; 912. Circular roller section; 92. Clamping hole; 93. Clamping bolt; 94. Top rod; 95. Clamping suction cup; 96. Clamping adjustment gap. Detailed Implementation

[0031] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0032] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0033] Example 1, as Figures 1-12 As shown, the present invention provides a welding device for repairing aluminum alloy car bodies of high-speed trains, including a car-lifting machine 2, a welding torch 3, and aluminum alloy welding material 4 made of the same material as the aluminum alloy car body 1 of the high-speed train. The welding torch 3 is connected to a welding machine and a welding wire supply structure. The aluminum alloy welding material 4 includes a plate 41 and a column array 42 disposed on the plate 41. The column array 42 includes multiple aluminum columns. The aluminum alloy welding material 4 is used to form a contoured pad 5 that matches the shape of the crack in the car body 1 by cutting. The lifting end of the car-lifting machine 2 is provided with a protective basket 6 connected to it by bolts. The handle of the welding torch 3 is provided with a welding... The welding gun support fixture 7 includes a universal rod 71, which is slidably mounted on a transverse rod 72. The transverse rod 72 is slidably mounted on a support plate 73. The support plate 73 is provided with two symmetrically distributed connecting rods 74. A positioning suction cup assembly 8 is provided at one end of the connecting rod 74 away from the support plate 73. At least one of the two positioning suction cup assemblies 8 is connected to the glass window of the high-speed train. A welding window 75 is provided in the middle of the support plate 73. A pad clamping fixture 9 connected to the contour pad 5 is provided opposite the welding window 75.

[0034] Specifically, the vehicle lifting machine 2 is a vertical lifting screw / hydraulic driven lifting device. The lifting end is rigidly connected to the protective basket 6 by bolts. The lifting power relies on the hydraulic / screw transmission pair of the vehicle lifting machine 2 to achieve vertical height adjustment, adapting to the welding needs of cracks at different heights on the roof, side walls, and underframe. The protective basket 6 forms a relatively safe personnel carrying platform, achieving high-altitude operation protection. The aluminum alloy welding material 4 is made of a uniform 6082 aluminum base plate + an integrated column array 42 aluminum columns. The plate body can be processed by shearing, milling, and grinding. The contoured pad 5 is cut according to the straight / arc trajectory of the crack, so that the contour of the pad basically fits the direction of the crack. The column array 42 aluminum columns provide a mechanical positioning and insertion reference for the subsequent pad clamping fixture 9. The welding torch support fixture 7 is based on the support plate 73. The inner side of the transverse rod 72 and the outer side of the support plate 73 have a linear sliding pair consisting of a groove and a slider. The bottom of the universal rod 71 and the surface of the transverse rod 72 have a secondary linear sliding pair consisting of a groove and a slider. The universal rod 71 has a built-in universal hinge rotation joint to realize the adjustment of the three-dimensional spatial position and welding angle of the welding torch 3. For safety, the hinge node between the welding torch 3 and the universal rod 71 is set as an anti-backward hinge, thereby providing suspended support for the welding torch 3, providing a fulcrum for high-altitude welding operations, reducing the cantilever shaking of the manually operated welding torch 3, and lowering the stability requirements for manual operation. The two symmetrical connecting rods 74 serve as lever arms. On the one hand, by extending to the glass window from different directions, they can provide the welding window 75 with a positioning orientation closest to the trend of the crack to be welded, which helps to reduce the difficulty of manually operating the welding torch. On the other hand, they provide a certain length to establish an adsorption relationship with the glass window.

[0035] Furthermore, the smooth, dense, and non-porous surface of the car window glass is easy to clean, and compared to the aluminum alloy car body 1, it is less prone to air leakage, resulting in higher reliability of negative pressure adsorption positioning. During welding preparation, the car window can be cleaned to provide an effective adsorption surface for the positioning suction cup assembly 8. Moreover, for most cracks in the side and end walls of the car body 1, the glass window can be used as a basis for building the welding positioning system. The positioning suction cup assembly 8 is fixed to the smooth glass surface of the train window by negative pressure vacuum adsorption, providing an external fixing reference for the entire welding gun support fixture 7 and preventing fixture displacement. A hollow welding window 75 is opened in the middle of the support plate 73. The welding window 75 is larger than the area of ​​the fixture 9 held by the pad, facilitating observation of the position of the contour pad 5 and allowing the welding gun 3 to easily extend into the bevel through the welding window 75 for welding. The pad clamping fixture 9 can clamp the contour pad 5 and remove it in real time. The aluminum pillars on the contour pad 5 can be used as spot welding nodes, so that the contour pad 5 as a whole is permanently welded to the inside of the vehicle body 1. This can reduce the probability of root defects, improve the root forming quality, and ensure the quality of crack welding.

[0036] To improve the clamping performance of the pad clamping fixture 9, the pad clamping fixture 9 provided by the present invention includes a clamping roller 91. The clamping roller 91 has a clamping hole 92 at its center that connects to the aluminum column. The clamping roller 91 has a pair of clamping bolts 93 and a pair of connecting holes symmetrically distributed about the clamping hole 92. A push rod 94 is threadedly connected to the connecting hole, and a clamping suction cup 95 is provided at the end of the push rod 94. The clamping roller 91 has a through clamping hole 92 at its center, forming a gap insertion fit with the aluminum column on the surface of the contour pad 5. The aluminum column is inserted into the clamping hole 92. By adjusting the rotation of the clamping roller 91, the actual clamping node can be determined in accordance with the crack trajectory and crack position. Tightening the clamping bolts 93 can clamp the aluminum column. Rotating the push rod 94 can make the clamping suction cup 95 effectively press against the surface of the car body 1, thereby improving the fit between the pad and the crack.

[0037] Furthermore, the clamping roller 91 includes a plate-shaped section 911 and a T-shaped circular roller section 912 connected to the plate-shaped section 911. The cylindrical surface of the circular roller section 912 is used to contact the surface of the car body 1 to be welded. The clamping roller 91 is provided with a clamping adjustment gap 96 that integrally penetrates the plate-shaped section 911 and the circular roller section 912. The clamping suction cup 95 is provided in the right-angle opening formed by the end of the circular roller section 912 and the plate surface of the plate-shaped section 911. The clamping roller 91 is divided into a flat plate section 911 and a cylindrical roller section 912, which are integrally formed to form a T-shaped cross-section load-bearing component. The cylindrical surface of the roller section 912 makes line contact with the outer surface of the aluminum alloy car body 1 profile. The cylindrical curved surface contact can adapt to the curved surface of the car roof and the curved transition of the underframe profile. Compared with the planar contact, it can reduce local contact stress and avoid scratching the painted surface of the car body 1. The plate section 911 serves as the mounting base, supporting all the adjustment parts such as the clamping hole 92, clamping bolt 93, and top rod 94. The flat structure facilitates the layout and processing of parts. The T-shaped cross-section has composite mechanical properties of bending and torsion resistance. During the welding process, it is not prone to bending deformation due to the pressure reaction force of the pad and the welding shrinkage tension. The plate section 911 and the roller section 912 have an integrated through clamping adjustment gap 96, which enables the clamping roller 91 to have a small elastic deformation capability. It can be used to clamp aluminum columns of different diameters, improving the clamping effect of the device on the contour pad 5. The end of the circular roller section 912 and the plate surface of the plate section 911 form a 90° right-angle concealed structure, and the clamping suction cup 95 is arranged inside the right-angle opening: on the one hand, the suction cup 95 is clamped by the solid structure on both sides to prevent the suction cup from sliding laterally when the top rod 94 extends and retracts; on the other hand, the right-angle space can accommodate the extension and retraction stroke of the suction cup, reducing the overall outer contour size of the clamping roller 91.

[0038] To improve the adsorption performance of the positioning suction cup assembly 8, the positioning suction cup assembly 8 provided by the present invention includes a suction cup cover 81. The suction cup cover 81 includes a circular cover section 811 and a T-shaped groove 812 communicating with the circular cover section 811. The end of the T-shaped groove 812 away from the circular cover section 811 is an arc-shaped structure and the arc-shaped structure is concentric with the circular cover section 811. A main suction cup 82 is provided inside the circular cover section 811. Two symmetrically distributed flexible strips 83 are provided in the T-shaped groove 812. An inner buckle 831 is provided at the end of one flexible strip 83, and an outer buckle 832 that cooperates with the inner buckle 831 is provided at the end of the other flexible strip 83. Multiple suction cup mounting grooves 833 distributed along its length direction are provided on the flexible strips 83. A secondary suction cup 84 is provided in the suction cup mounting grooves 833. The suction cup cover 81 has a composite cavity inside, with the circular cover section 811 accommodating the main suction cup 82 as the main negative pressure positioning unit, providing core adsorption and fixing force. The T-slot 812 provides a certain constraint for the flexible strip 83, and its arc structure increases the basic circular diameter of the flexible strip 83. Therefore, the free end of the flexible strip 83 has a longer length and the actual attachment curve trajectory is adjustable, extending the actual adsorption span of the positioning suction cup assembly 8. This allows the device to meet the positioning requirements for welding cracks at different heights to the maximum extent while adsorbing and connecting with the glass window. Figure 2 The two welding devices on the right are attached to the positions of the positioning suction cup components 8. At least one set of positioning suction cup components 8 in each welding device is connected to the glass window of the high-speed train. For the other set of positioning suction cup components 8, the connection object can be the aluminum alloy car body 1 or the glass window. For example, if the main suction cup 82 is connected to the aluminum alloy car body 1, the auxiliary suction cup 84 on the flexible strip 83 can be extended to the position of the glass window to establish individual adsorption nodes with the glass window, so as to improve the adsorption reliability of the positioning suction cup component 8 and the aluminum alloy car body 1.

[0039] To improve the flexible adsorption span adjustment performance of the flexible strip 83, the flexible strip 83 provided by the present invention has multiple sets of staggered deformable teeth 834 on its front and back sides. The flexible strip 83 has multiple concave openings 835 that are integrally connected and communicate with the suction cup mounting groove 833 inside. The auxiliary suction cup 84 has a rectangular groove structure with an H-shaped longitudinal section. The side of the auxiliary suction cup 84 is in frictional engagement with the groove surface of the suction cup mounting groove 833. The inner side of the auxiliary suction cup 84 is provided with a dovetail protrusion 841 that slides and limits the concave opening 835. The end of the flexible strip 83 is provided with a one-way exhaust valve. The flexible strip 83 features alternating deformable teeth 834 on both sides, effectively creating multiple stress-relieving notches on the substrate to form a segmented elastic deformation structure. When the tooling is subjected to the thrust of the welding torch 3 and welding shrinkage vibration loads, the deformable teeth 834 allow for slight local stretching and bending of the flexible strip 83, buffering impact vibrations and preventing the single main suction cup 82 from being instantly overloaded and detached. The alternating arrangement allows for deformation buffering in any direction, adapting to multi-angle fitting of the curved surface of the vehicle body 1. The inner side of the auxiliary suction cup 84 has an integrally formed dovetail protrusion 841, which, together with the concave opening 835, forms a sliding limiting pair. The dovetail structure has an anti-detachment limiting function, allowing it to slide only along the groove and preventing it from laterally detaching from the mounting groove, ensuring that the auxiliary suction cup 84 does not fall off or flip during the position adjustment process. The flexible band 83 has an integrally formed concave opening 835 inside, forming a through negative pressure air passage; the auxiliary suction cup 84 has an H-shaped rectangular groove structure in its longitudinal section, and the outer walls on both sides form a friction sliding pair with the groove wall of the suction cup mounting groove 833, which has a certain sealing effect. Moreover, the H-shape allows the auxiliary suction cup 84 to adaptively adjust with the curvature of the flexible band 83, without producing a large area of ​​space gap; by pressing the auxiliary suction cup 84 by hand, the air inside the auxiliary suction cup 84 and the concave opening 835 is squeezed out, the inner wall of the concave opening 835 adsorbs the auxiliary suction cup 84, and the auxiliary suction cup 84 itself adsorbs the glass window and the aluminum alloy body 1.

[0040] Furthermore, a suction cup support column 86 is provided at the center of the concave opening 835, and a limiting rod 842 that telescopically cooperates with the suction cup support column 86 is provided at the center of the auxiliary suction cup 84. The vertical suction cup support column 86 is fixed at the center of the concave opening 835, and the limiting rod 842 extends integrally from the center of the auxiliary suction cup 84. The head end of the limiting rod 842 has a mushroom head structure, which cooperates with the guide hole at the center of the suction cup support column 86. The guide hole is a variable diameter hole, and the smallest variable diameter position is used to lock the mushroom head, preventing the limiting rod 842 from disengaging from the suction cup support column 86. The extension and retraction strokes of the limiting rods 842 and suction cup supports 86 at nodes of different lengths provide adaptive compensation: when the car window glass has curvature or slight surface irregularities, the extension height of the auxiliary suction cups 84 at different positions can be adjusted independently to ensure that all auxiliary suction cups 84 are synchronously attached to the glass surface to the maximum extent, reducing the air residue at the local concave openings 835 under negative pressure adsorption; a micro compression spring can be built between the support and the limiting rods 842, relying on the spring force to continuously push the auxiliary suction cups 84 outward, ensuring that the adsorption surface is always pressed tightly against the glass, and improving the negative pressure sealing effect.

[0041] To improve the applicability of the combined length of the positioning suction cup assembly 8 and the connecting rod 74, the suction cup cover 81 provided by the present invention is provided with a clamping bolt 93 at its center, which engages with the oblong hole 76 provided on the connecting rod 74. The connecting rod 74 has an elongated oblong adjustment hole, and the clamping bolt 93, which is fitted at the center of the suction cup cover 81, passes through the oblong hole 76. The suction cup cover 81 can be moved along the length of the oblong hole 76 to adjust the linear distance between the positioning suction cup assembly 8 and the support plate 73, adapting to the positioning needs of windows of different widths, cracks of different positions, and cracks of different directions.

[0042] To improve the support effect of the welding torch support fixture 7, the welding torch support fixture 7 provided by this invention is equipped with three buffer suction cups 77 arranged in a triangular pattern. Two of the buffer suction cups 77 are coaxially connected to two connecting rods 74 in a one-to-one correspondence. The support plate 73 is arranged with three buffer suction cups 77 in a triangular geometric arrangement. In mechanical mechanics, three-point support can achieve complete planar positioning, eliminating the degree of freedom of the fixture support plate 73 to deflect or sway around any axis, forming a stable planar support reference. Two of the buffer suction cups 77 are coaxially arranged with the connecting rods 74 to bear the load transmitted by the connecting rods 74. The third buffer suction cup 77 serves as an auxiliary support point to counteract the overturning torque caused by the downward pressure of the welding torch 3 during welding. The buffer suction cup 77 has both negative pressure adsorption positioning and elastic buffering functions: the suction cup adsorbs the side wall / window of the vehicle body 1 to form an auxiliary fixing point, which further improves the overall anti-displacement capability of the tooling; the buffer suction cup 77 adopts an elastic rubber buffer substrate to form a vibration reduction and buffering structure. The vibration load generated by the welding arc impact and the manual pushing and pulling of the welding gun 3 will be absorbed by the rubber elastomer, blocking the vibration from being transmitted to the positioning suction cup assembly 8, preventing the main suction cup 82 and the auxiliary suction cup 84 from detaching due to vibration and pressure loss, which is conducive to ensuring the positioning accuracy of the tooling throughout the welding process.

[0043] In Example 2, the suction cup mounting groove 833 provided in this example achieves air passage interconnection through the concave opening 835. The disk surface of the auxiliary suction cup 84 and the disk surface of the main suction cup 82 are connected to the air pipe through a flexible pipe. The air pipe is led out from the hollow clamping bolt 93 and connected to the air source. The air source is set on the ground or in the protective basket 6 of the car lifting machine 2. The air source is used to uniformly draw a vacuum, reducing the air leakage gaps that may occur due to local deformation and improving the reliability of maintaining negative pressure inside the suction cup for a long time.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A high-speed train aluminum alloy car body repair and welding device, comprising a car jack and a welding torch, characterized in that, It also includes aluminum alloy welding materials made of the same material as the aluminum alloy body of the high-speed train. The aluminum alloy welding materials include a plate and a column array disposed on the plate. The column array includes multiple aluminum columns. The aluminum alloy welding materials are used to form a contour pad that matches the shape of the crack in the car body by cutting. The lifting end of the car jack is provided with a protective basket that is bolted to it. The handle of the welding torch is provided with a welding torch support fixture. The welding torch support fixture includes a universal rod that is slidably disposed on a transverse rod. The transverse rod is slidably disposed on a support plate. The support plate is provided with two symmetrically distributed connecting rods. The end of the connecting rod away from the support plate is provided with a positioning suction cup assembly. At least one of the two positioning suction cup assemblies is connected to the glass window of the high-speed train. A welding window is provided in the middle of the support plate. Opposite to the welding window is a pad clamping fixture connected to the contour pad.

2. The high-speed train aluminum alloy car body repair and welding device according to claim 1, characterized in that, The pad clamping fixture includes a clamping roller, the center of which is provided with a clamping hole for connecting to the aluminum column. The clamping roller is provided with a pair of clamping bolts and a pair of connecting holes symmetrically distributed about the clamping hole. A push rod is provided in the connecting hole, and a clamping suction cup is provided at the end of the push rod.

3. The high-speed train aluminum alloy car body repair and welding device according to claim 2, characterized in that, The clamping roller includes a plate-shaped section and a T-shaped circular roller section connected to the plate-shaped section. The cylindrical surface of the circular roller section is used to contact the surface of the vehicle body to be welded. The clamping roller is provided with an integral clamping adjustment gap that runs through the plate-shaped section and the circular roller section. The clamping suction cup is located in the right-angle opening formed by the end of the circular roller section and the plate surface of the plate-shaped section.

4. The high-speed train aluminum alloy car body repair and welding device according to claim 1, characterized in that, The positioning suction cup assembly includes a suction cup cover, which includes a circular cover section and a T-shaped groove communicating with the circular cover section. The end of the T-shaped groove away from the circular cover section is an arc-shaped structure, and the arc-shaped structure is concentric with the circular cover section. A main suction cup is provided inside the circular cover section. Two symmetrically distributed flexible strips are provided in the T-shaped groove. One flexible strip has an inner buckle at its end, and the other flexible strip has an outer buckle at its end that cooperates with the inner buckle. Multiple suction cup mounting slots are provided on the flexible strips along their length direction, and auxiliary suction cups are provided in the suction cup mounting slots.

5. The high-speed train aluminum alloy car body repair and welding device according to claim 4, characterized in that, The flexible strip has multiple sets of staggered deformable teeth on its front and back sides. The flexible strip has multiple concave openings that are integrally connected and communicate with the suction cup mounting groove inside. The auxiliary suction cup has a rectangular groove structure with an H-shaped longitudinal section. The side of the auxiliary suction cup is in frictional engagement with the groove surface of the suction cup mounting groove. The inner side of the auxiliary suction cup has a dovetail protrusion that slides and limits the concave opening. The end of the flexible strip is provided with a one-way exhaust valve.

6. The high-speed train aluminum alloy car body repair and welding device according to claim 5, characterized in that, A suction cup support is provided at the center of the concave opening, and a limiting rod that telescopically cooperates with the suction cup support is provided at the center of the auxiliary suction cup.

7. The high-speed train aluminum alloy car body repair and welding device according to claim 6, characterized in that, The suction cup cover has a clamping bolt at its center, which engages with a slotted hole on the connecting rod.

8. The high-speed train aluminum alloy car body repair and welding device according to claim 7, characterized in that, The welding torch support fixture is equipped with three buffer suction cups arranged in a triangular pattern, two of which are coaxially connected to two connecting rods in a one-to-one correspondence.

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