Cabin longitudinal beam laser flight welding equipment on rotary table

Abstract

The invention discloses cabin longitudinal beam laser flight welding equipment on a rotary table, and belongs to the technical field of cabin longitudinal beam machining. The device comprises a laser flying welding arm and a welding rotary table, the welding rotary table is provided with at least two sets of bearing table tops, and each set of bearing table top is provided with a clamping and fixing device used for fixing a wheel cover outer plate assembly. Each set of clamping and fixing device comprises a plurality of sets of rear limiting mechanisms arranged on the rear side of the bearing table top and used for limiting the rear side of the fixed wheel cover outer plate assembly and a plurality of sets of front limiting mechanisms arranged on the front side of the bearing table top and used for limiting the front side and the outer edge of the fixed wheel cover outer plate assembly. And the screw hole limiting mechanisms are distributed on the upper surface of the bearing table top and used for limiting bolt holes in the fixed wheel cover outer plate assembly. When the clamping device is used, multi-point limiting clamping is conducted on the wheel cover outer plate assembly from multiple directions and positions through the multiple sets of front limiting mechanisms, the multiple sets of rear limiting mechanisms and the multiple sets of limiting assemblies, the position of the wheel cover outer plate assembly can be comprehensively restrained, and stability is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of engine room longitudinal beam processing, and in particular to a laser flight welding device for engine room longitudinal beams on a turntable. Background Technology

[0002] The machining of engine compartment longitudinal beams is the process of manufacturing and forming this key load-bearing component in automobile manufacturing. As a collision energy-absorbing component, the front engine compartment longitudinal beam is usually made of low-alloy steel sheet by stamping, and the machining involves processes such as blanking, punching, bending, and welding.

[0003] In the machining and welding process of the cabin longitudinal beams, the cabin longitudinal beam shell is first placed on a welding platform and securely fixed with clamps to prevent displacement during welding. Then, the laser-guided welding arm is activated and moves rapidly along a preset trajectory. During this movement, the laser beam is focused at high speed onto the welding area of ​​the shell, instantly generating high temperatures that melt the material, achieving a strong weld.

[0004] During the machining and welding of the longitudinal beam shell of the engine room, due to the complex shape of the shell, the fixtures are usually only used to clamp the edges and rear sides of the welding components of multiple wheel arch outer panel assemblies. After clamping, the weight distribution of the shell is uneven, and some areas are subjected to excessive stress. During the subsequent welding process, the welding parts are affected by heat. Due to the uneven weight distribution, this thermal change may cause local stress concentration in the shell, which in turn leads to deformation of the shell in the direction of gravity, affecting the welding quality. Summary of the Invention

[0005] This invention provides a laser flight welding device for the longitudinal beams of the cabin on a turntable, which can solve the problem in the prior art where uneven weight distribution when the clamp holds the shell may cause deformation of the shell in the direction of gravity, affecting the welding quality.

[0006] A laser-assisted flight welding device for a cabin longitudinal beam on a turntable includes a laser-assisted flight welding arm and a welding turntable. The welding turntable is provided with at least two sets of support surfaces. Each set of support surfaces is equipped with a clamping and fixing device for fixing a wheel arch outer plate assembly. Each set of clamping and fixing devices includes multiple sets of rear limiting mechanisms located on the rear side of the support surface for limiting the rear side of the wheel arch outer plate assembly, front limiting mechanisms located on the front side of the support surface for limiting the front side and outer edge of the wheel arch outer plate assembly, bolt hole limiting mechanisms distributed on the upper surface of the support surface for limiting bolt holes on the wheel arch outer plate assembly, and limiting components that cooperate with the front and rear limiting mechanisms to adapt to the shape of the bottom and outer edge of the wheel arch outer plate assembly. Multiple sets of support frames are also fixedly installed on the support surface to maintain the relative positions of the front and rear limiting mechanisms and the limiting components before and after the wheel arch outer plate assembly is placed.

[0007] As a further aspect of the present invention: each set of the bearing platform and the welding turntable is provided with an angle adjustment device for adjusting the deflection angle of the bearing platform.

[0008] As a further aspect of the present invention: each of the aforementioned front limiting mechanisms includes a first hydraulic seat fixedly mounted on a corresponding support frame. The output end of the first hydraulic seat is provided with a first pressure arm. The first hydraulic seat can drive the first pressure arm to rotate around one end. The end of the first pressure arm is fixedly provided with a pressing component. When the first pressure arm rotates, it drives the pressing component to press against the wheel cover outer plate assembly.

[0009] As a further embodiment of the present invention: each set of rear limiting mechanisms includes a third hydraulic seat fixedly mounted on a corresponding support frame. A second pressure arm is provided on the output end of the third hydraulic seat. The third hydraulic seat can drive the second pressure arm to rotate around one end. A front plate is fixedly mounted on the second pressure arm. An adjusting arm is movably mounted below the front plate. An elastic element is provided between the adjusting arm and the front plate. A pressure head for pressing against the outer plate assembly of the wheel cover is provided below the adjusting arm.

[0010] As a further aspect of the present invention: each set of screw hole limiting mechanisms includes a second hydraulic seat fixedly mounted on a corresponding support frame. The output end of the second hydraulic seat is fixedly provided with a pin for passing through the bolt hole. The second hydraulic seat can drive the pin to push into the corresponding threaded hole on the outer plate assembly of the wheel cover.

[0011] As a further aspect of the present invention: each set of limiting components is assembled from a first limiting block and is used to support the adapter wheel cover outer plate assembly.

[0012] As a further aspect of the present invention: each set of the pressing components is assembled from a second limiting block and is used to clamp the adapter wheel cover outer plate assembly.

[0013] As a further embodiment of the present invention: each set of angle adjustment mechanisms includes an automatic lifting arm movably mounted on the welding turntable. The support end of the automatic lifting arm is movably connected to the front end of the bearing platform. A push guide rail is fixedly mounted on the welding turntable. A support seat is fitted on the push guide rail. The push guide rail can drive the support seat to move back and forth. A slide plate is movably mounted on the support seat. A slide seat that slides with the slide plate is fixedly mounted at the bottom of the bearing platform.

[0014] As a further aspect of the present invention: the welding turntable is provided with a horizontal support device for maintaining the horizontal state of the bearing surface.

[0015] As a further aspect of the present invention: the horizontal support device includes an electric telescopic rod fixedly connected to the welding turntable, a push plate is fixedly provided at the extended end of the electric telescopic rod, and a limiting seat adapted to the shape of the push plate is fixedly provided at the bottom of the bearing platform. The electric telescopic rod can push the push plate into the limiting seat, and the stability of the bearing platform is maintained through the cooperation of the push plate and the limiting seat.

[0016] The beneficial effects of this invention are: 1. In use, this invention employs multiple sets of front limiting mechanisms, rear limiting mechanisms, and limiting components to clamp the wheel arch outer plate assembly at multiple points from multiple directions and positions, comprehensively constraining its position. The front limiting mechanism drives the first pressure arm to rotate via a first hydraulic seat, causing the pressing component to engage with the wheel arch outer plate assembly, ensuring stability of the front side and outer edge. The rear limiting mechanism utilizes a third hydraulic seat to drive the second pressure arm to rotate, causing the pressure head to press against the rear edge; the elastic element can also adjust the clamping force. The limiting component cooperates with the front and rear limiting mechanisms to support and adapt the wheel arch outer plate assembly. Furthermore, the screw hole limiting mechanism uses a second hydraulic seat to drive a pin to insert into the threaded hole, preventing displacement due to changes in the bolt hole position. Simultaneously, the horizontal support device maintains the horizontal stability of the bearing platform during assembly and normal welding stages, providing a stable operating platform for welding.

[0017] 2. In use, the automatic lifting arm initially adjusts the height of the front end of the support platform through its lifting motion. The push guide rail on the welding turntable drives the support base to move back and forth. Combined with the sliding of the slide plate and the slide block, this allows for further precise adjustment of the tilt angle and the position of the deflection center of the support platform. Through these adjustments, the tilt state of the support platform can be adapted to the welding range of the laser flying welding arm, enabling the laser flying welding arm to effectively weld areas that were previously impossible to weld due to shape limitations, thereby effectively eliminating welding dead angles. Attached Figure Description

[0018] Figure 1 A side view of a laser flight welding device for the longitudinal beam of a cabin on a turntable, provided by the present invention; Figure 2 A top view of a laser flight welding device for the longitudinal beams of a cabin on a turntable, provided by the present invention; Figure 3 A schematic diagram of the support platform structure of a laser flight welding equipment for the longitudinal beams of a cabin on a turntable, provided by the present invention; Figure 4 A schematic diagram of the structure of a laser flight welding device for a cabin longitudinal beam on a turntable, provided by the present invention; Figure 5 A schematic diagram of the wheel cover outer plate assembly of a laser flight welding equipment for a cabin longitudinal beam on a turntable provided by the present invention; Figure 6A schematic diagram of the welding turntable structure for a laser flight welding equipment for engine room longitudinal beams on a turntable provided by the present invention; Figure 7 A schematic diagram of the angle adjustment device for a laser flight welding equipment for a cabin longitudinal beam on a turntable provided by the present invention; Figure 8 A schematic diagram of the front limit mechanism of a laser flight welding equipment for a cabin longitudinal beam on a turntable provided by the present invention; Figure 9 A schematic diagram of the rear limiting mechanism of a laser flight welding device for a cabin longitudinal beam on a turntable provided by the present invention; Figure 10 A schematic diagram of the rear limiting mechanism of a laser flight welding device for a cabin longitudinal beam on a turntable provided by the present invention; Figure 11 A schematic diagram of the front limit mechanism of a laser flight welding equipment for a cabin longitudinal beam on a turntable provided by the present invention; Figure 12 This invention provides a schematic diagram of a screw hole limiting mechanism for a laser flight welding device for a cabin longitudinal beam on a turntable.

[0019] Explanation of reference numerals in the attached figures: 1. Laser flying welding arm; 2. Welding turntable; 3. Support platform; 4. Angle adjustment device; 401. Automatic lifting arm; 402. Push guide rail; 403. Support base; 404. Slide plate; 405. Slide seat; 5. Clamping and fixing device; 501. Hydraulic control mechanism; 502. Support frame; 503. Front limit mechanism; 5031. First hydraulic seat; 5032. First pressure arm; 5033. Pressure holding assembly; 50 4. Screw hole limiting mechanism; 5041. Second hydraulic seat; 5042. Pin rod; 505. Limiting assembly; 506. Rear limiting mechanism; 5061. Third hydraulic seat; 5062. Second pressure arm; 5063. Front plate; 5064. Adjusting arm; 5065. Pressure head; 5066. Elastic element; 6. Horizontal support device; 601. Electric telescopic rod; 602. Push plate; 603. Limiting seat; 7. Wheel cover outer plate assembly. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] like Figures 1 to 12As shown in the figure, an embodiment of the present invention provides a laser flight welding device for a cabin longitudinal beam on a turntable, including a laser flight welding arm 1 and a welding turntable 2, on which two sets of bearing surfaces 3 are provided. Each set of bearing surfaces 3 is provided with a clamping and fixing device 5 for fixing the wheel cover outer plate assembly 7. These clamping and fixing devices 5 can ensure the stability of the wheel cover outer plate assembly 7 during the welding process. At the same time, an angle adjustment device 4 for adjusting the deflection angle of each set of bearing surfaces 3 is provided between each set of bearing surfaces 3 and the welding turntable 2. In actual use, the clamping and fixing devices 5 perform multi-point limiting clamping on the wheel cover outer plate assembly 7, ensuring that multiple positions of each welding component of the wheel cover outer plate assembly 7 have corresponding components for precise limiting, thereby maximizing the welding effect.

[0022] In addition, such as Figure 5 As shown, the fixed wheel cover outer plate assembly 7 is irregularly shaped, with numerous protrusions, grooves, and holes on its shell, and is composed of different plates. Although the laser flying welding arm 1 has a flexible cantilever, welding dead angles are still unavoidable during the welding process, which can seriously affect the welding effect. When welding dead angles occur, the tilt angle of the support platform 3 can be adjusted by the angle adjustment device 4, so that the tilt state of the support platform 3 can adapt to the welding range of the laser flying welding arm 1, thereby effectively eliminating welding dead angles.

[0023] Specifically, each clamping and fixing device 5 includes multiple sets of rear limiting mechanisms 506 located on the rear side of the support platform 3 for limiting the rear side of the wheel cover outer plate assembly 7, front limiting mechanisms 503 located on the front side of the support platform 3 for limiting the front side and outer edge of the wheel cover outer plate assembly 7, bolt hole limiting mechanisms 504 distributed on the upper surface of the support platform 3 for limiting the bolt holes on the wheel cover outer plate assembly 7, and limiting components 505 that cooperate with the front limiting mechanisms 503 and rear limiting mechanisms 506 to adapt to the shape of the bottom and outer edge of the wheel cover outer plate assembly 7. Through multiple sets of front limiting mechanisms 503, rear limiting mechanisms 506 and limiting components 505, the wheel cover outer plate assembly 7 is clamped and limited at multiple points, which can constrain the wheel cover outer plate assembly 7 from multiple directions and positions, thereby maintaining the stability of the wheel cover outer plate assembly 7 during welding. Multiple sets of support frames 502 are also fixedly installed on the support platform 3, such as Figure 9 , Figure 10 , Figure 11 and Figure 12 As shown, the support frame 502 plays an important supporting role in the entire clamping and fixing device 5. It is used to maintain the relative positions of the front limiting mechanism 503, the rear limiting mechanism 506 and the limiting assembly 505 before and after the wheel cover outer plate assembly 7 is placed, so as to ensure that it can function stably during the placement and welding process of the wheel cover outer plate assembly 7.

[0024] In one specific embodiment, each set of limiting components 505 is assembled from a first limiting block, and its main function is to support the wheel cover outer plate assembly 7. The limiting components 505 are generally mounted on the support frame 502, and the structure of each limiting component 505 needs to be determined according to the adaptation requirements to fix the wheel cover outer plate assembly 7. By pressing the limiting components 505 against the bottom or side of the wheel cover outer plate assembly 7 and cooperating with the front limiting mechanism 503 or the rear limiting mechanism 506, the wheel cover outer plate assembly 7 is fixed, ensuring that the wheel cover outer plate assembly 7 will not shift during the welding process.

[0025] Each set of front limiting mechanisms 503 includes a first hydraulic seat 5031 fixedly mounted on a corresponding support frame 502. A first pressure arm 5032 is provided at the output end of the first hydraulic seat 5031, which can drive the first pressure arm 5032 to rotate around one end. A pressing component 5033 is fixedly mounted at the end of the first pressure arm 5032. When the first pressure arm 5032 rotates, it drives the pressing component 5033 to press against the wheel cover outer plate assembly 7. In use, after the wheel cover outer plate assembly 7 is placed, the first hydraulic seat 5031 drives the first pressure arm 5032 to rotate around one end, thereby driving the pressing component 5033 to rotate, allowing the pressing component 5033 to engage with the wheel cover outer plate assembly 7. This achieves pressing against the wheel cover outer plate assembly 7 or clamping it in conjunction with other structures, ensuring the stability of the front side and outer edge of the wheel cover outer plate assembly 7.

[0026] It should be noted that the structure of the clamping assembly 5033 is not uniform. Each clamping assembly 5033 is assembled from a second limiting block, and its design purpose is to cooperate with the first limiting block to clamp the wheel cover outer panel assembly 7. The specific mechanisms of the clamping assembly 5033 and the limiting assembly 505 are not fixed and can be adjusted according to the usage to adapt to the irregular shape of the wheel cover outer panel assembly 7. This solution only provides one assembly scheme. Other assembly schemes that complete the assembly of the clamping assembly 5033 and the limiting assembly 505 according to the above purpose all fall within the protection scope of this patent.

[0027] Each set of rear limiting mechanisms 506 includes a third hydraulic seat 5061 fixedly mounted on a corresponding support frame 502. A second pressure arm 5062 is provided on the output end of the third hydraulic seat 5061. The third hydraulic seat 5061 can drive the second pressure arm 5062 to rotate around one end. A front plate 5063 is fixedly mounted on the second pressure arm 5062. An adjusting arm 5064 is movably mounted below the front plate 5063. An elastic element 5066 is provided between the adjusting arm 5064 and the front plate 5063. A pressure head 5065 for pressing against the wheel cover outer plate assembly 7 is provided below the adjusting arm 5064. In use, the third hydraulic seat 5061 can drive the second pressure arm 5062 to rotate around one end. The second pressure arm 5062 drives the front plate 5063 to move, which in turn drives the adjusting arm 5064 on the front plate 5063 to move downward. The adjusting arm 5064 drives the pressure head 5065 to press against the rear edge of the wheel cover outer plate assembly 7. The elastic element 5066 provides elastic cushioning and can adjust the clamping force to maintain stable clamping of the wheel cover outer plate assembly 7.

[0028] Each set of bolt hole limiting mechanisms 504 includes a second hydraulic seat 5041 fixedly mounted on a corresponding support frame 502. The output end of the second hydraulic seat 5041 is fixedly equipped with a pin 5042 for passing through the bolt hole. The second hydraulic seat 5041 can drive the pin 5042 into the corresponding threaded hole on the wheel cover outer plate assembly 7. The second hydraulic seats 5041 are located at the bottom of the bolt holes, and their main function is to fix the wheel cover outer plate assembly 7 through the bolt holes. In use, the second hydraulic seat 5041 drives the pin 5042 into the threaded hole, thereby fixing the wheel cover outer plate assembly 7 and ensuring that the wheel cover outer plate assembly 7 will not shift due to changes in the bolt hole position during welding.

[0029] In this embodiment, five sets of rear limiting mechanisms 506 are provided, all parallel to each other on the rear side of the bearing platform 3. This layout can stably limit the rear side of the wheel cover outer plate assembly 7 from multiple points. Thirteen sets of front limiting mechanisms 503 are provided, arranged around the outer and inner edges of the wheel cover outer plate assembly 7, which can comprehensively limit the front and outer edges of the wheel cover outer plate assembly 7. Limiting components 505 are distributed between the front limiting mechanisms 503 and the rear limiting mechanisms 506, and cooperate with the front limiting mechanisms 503 and the rear limiting mechanisms 506 to support the wheel cover outer plate assembly 7. The number and position of the limiting components 505 can be designed as needed to better adapt to wheel cover outer plate assemblies 7 of different shapes and sizes. Screw hole limiting mechanisms 504 are distributed at the bottom of each threaded hole on the wheel cover outer plate assembly 7, jointly maintaining the stability of the wheel cover outer plate assembly 7. It should be noted that this embodiment only provides one distribution scheme, such as Figure 3 As shown, however, those skilled in the art can adjust and adapt the wheel cover outer panel assembly 7 according to its corresponding size and shape. All technical solutions designed to achieve this purpose, consisting of the above-mentioned mechanisms, fall within the scope of protection of this patent.

[0030] Each angle adjustment mechanism includes an automatic lifting arm 401 movably mounted on the welding turntable 2. The support end of the automatic lifting arm 401 is movably connected to the front end of the support platform 3. Through the lifting and lowering movement of the automatic lifting arm 401, the height of the front end of the support platform 3 can be initially adjusted. A push guide rail 402 is fixedly mounted on the welding turntable 2, and a support base 403 is fitted on the push guide rail 402. The push guide rail 402 can drive the support base 403 to move back and forth. A sliding plate 404 is movably mounted on the support base 403, and a sliding seat 405 is fixedly mounted on the bottom of the support platform 3, which slides in cooperation with the sliding plate 404. Based on the adjustment of the height of the front end of the support platform 3 by the automatic lifting arm 401, the push guide rail 402 drives the support base 403 to move back and forth, and the sliding cooperation between the sliding plate 404 and the sliding seat 405 can further and precisely adjust the tilt angle of the support platform 3 and the position of the deflection center, so as to better adapt it to the welding range of the laser flying welding arm 1.

[0031] The welding turntable 2 is equipped with a horizontal support device 6 to maintain the horizontal state of the support platform 3. The horizontal support device 6 includes an electric telescopic rod 601 fixedly connected to the welding turntable 2. A push plate 602 is fixedly installed at the extended end of the electric telescopic rod 601, and a limiting seat 603 with a shape adapted to the push plate 602 is fixedly installed at the bottom of the support platform 3. The electric telescopic rod 601 can push the push plate 602 into the limiting seat 603. Through the cooperation between the push plate 602 and the limiting seat 603, the stability of the support platform 3 is maintained. During normal welding or assembly, the support platform 3 will remain horizontal. At this time, the electric telescopic rod 601 extends and moves the push plate 602 upward. The push plate 602 is engaged in the limiting seat 603, and the push plate 602 will remain horizontal, thereby ensuring that the support platform 3 will also remain horizontal. This ensures the stability of the support platform 3 when adjusting the layout of the support platform 3 and fixing the wheel cover outer plate assembly 7, providing a stable operating platform for welding work.

[0032] Working principle: During assembly, the horizontal support device 6 is activated, and the electric telescopic rod 601 extends, causing the push plate 602 to move upward, so that the push plate 602 is engaged in the limiting seat 603, maintaining the bearing platform 3 in a horizontal and stable state. The wheel cover outer plate assembly 7 is placed on the bearing platform 3, and the limiting component 505 presses against the bottom and sides of the wheel cover outer plate assembly 7, completing the initial bearing of the wheel cover outer plate assembly 7 through the limiting component.

[0033] The first hydraulic seat 5031 is activated, which drives the first pressure arm 5032 to rotate around one end, thereby driving the pressure holding assembly 5033 to rotate, so that the pressure holding assembly 5033 is fastened to the wheel cover outer plate assembly 7, thereby achieving the pressing of the front side and outer edge of the wheel cover outer plate assembly 7 or the clamping in conjunction with other structures, ensuring the stability of its front side and outer edge.

[0034] The third hydraulic seat 5061 is activated, which drives the second pressure arm 5062 to rotate around one end. The second pressure arm 5062 drives the front plate 5063 to move, which in turn drives the adjusting arm 5064 on the front plate 5063 to move down. The adjusting arm 5064 drives the pressure head 5065 to press against the rear edge of the wheel cover outer plate assembly 7. At the same time, the elastic element 5066 provides elastic buffering, adjusts the clamping force, and maintains stable clamping of the rear side of the wheel cover outer plate assembly 7.

[0035] The second hydraulic seat 5041 is activated, which drives the pin 5042 to insert into the threaded hole on the wheel cover outer plate assembly 7, thereby fixing the wheel cover outer plate assembly 7 through the bolt hole position and preventing it from shifting due to changes in the bolt hole position during the welding process.

[0036] During normal welding, the laser flying welding arm 1 performs welding operations on the fixed wheel cover outer plate assembly 7. When a welding dead angle occurs during the welding process, the electric telescopic rod 601 extends and drives the push plate 602 to move down, causing the push plate 602 to move out of the limit seat 603. Then, the push guide rail 402 is activated to drive the support seat 403 to move back and forth. Then, the automatic lifting arm 401 in the angle adjustment mechanism is activated. Through its lifting movement, the height of the front end of the bearing platform 3 is initially adjusted, thereby causing the bearing platform 3 to tilt. In addition, with the sliding cooperation of the slide plate 404 and the slide seat 405, the tilt angle and the position of the deflection center of the bearing platform 3 can be precisely adjusted so that the tilt state of the bearing platform 3 can be adapted to the welding range of the laser flying welding arm 1, thereby effectively eliminating the welding dead angle and continuing to complete the welding work.

[0037] After the welding work is completed, the fixing of the wheel cover outer plate assembly 7 by the front limiting mechanism 503, the rear limiting mechanism 506 and the screw hole limiting mechanism 504 is released in sequence, and the welded wheel cover outer plate assembly 7 is removed from the bearing platform 3.

[0038] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A laser flight welding device for a cabin longitudinal beam on a turntable, comprising a laser flight welding arm (1) and a welding turntable (2), characterized in that: The welding turntable (2) is provided with at least two sets of bearing platforms (3). Each set of bearing platforms (3) is provided with a clamping and fixing device (5) for fixing the wheel cover outer plate assembly (7). Each set of clamping and fixing devices (5) includes multiple sets of rear limiting mechanisms (506) provided on the rear side of the bearing platform (3) for limiting the rear side of the wheel cover outer plate assembly (7), front limiting mechanisms (503) provided on the front side of the bearing platform (3) for limiting the front side and outer edge of the wheel cover outer plate assembly (7), and distributed on the upper surface of the bearing platform (3). A bolt hole limiting mechanism (504) for limiting the bolt holes on the fixed wheel cover outer plate assembly (7), and a limiting component (505) that cooperates with the front limiting mechanism (503) and the rear limiting mechanism (506) to adapt to the bottom and outer edge shape of the fixed wheel cover outer plate assembly (7). Multiple sets of support frames (502) are also fixedly installed on the bearing platform (3). The support frames (502) are used to maintain the relative positions of the front limiting mechanism (503), the rear limiting mechanism (506) and the limiting component (505) before and after the fixed wheel cover outer plate assembly (7) is placed.

2. The laser flight welding equipment for engine room longitudinal beams on a turntable as described in claim 1, characterized in that, Each of the aforementioned support platform (3) and welding turntable (2) is provided with an angle adjustment device (4) for adjusting the deflection angle of the support platform (3).

3. The laser flight welding equipment for the longitudinal beams of the cabin on a turntable as described in claim 2, characterized in that, Each of the aforementioned front limiting mechanisms (503) includes a first hydraulic seat (5031) fixedly mounted on a corresponding support frame (502). The output end of the first hydraulic seat (5031) is provided with a first pressure arm (5032). The first hydraulic seat (5031) can drive the first pressure arm (5032) to rotate around one end. The end of the first pressure arm (5032) is fixedly provided with a pressing component (5033). When the first pressure arm (5032) rotates, it drives the pressing component (5033) to press against the wheel cover outer plate assembly (7).

4. The laser flight welding equipment for the longitudinal beams of the engine room on a turntable as described in claim 3, characterized in that, Each of the rear limiting mechanisms (506) includes a third hydraulic seat (5061) fixedly mounted on a corresponding support frame (502). A second pressure arm (5062) is provided on the output end of the third hydraulic seat (5061). The third hydraulic seat (5061) can drive the second pressure arm (5062) to rotate around one end. A front plate (5063) is fixedly mounted on the second pressure arm (5062). An adjusting arm (5064) is movably mounted below the front plate (5063). An elastic element (5066) is provided between the upper part of the adjusting arm (5064) and the front plate (5063). A pressure head (5065) for pressing against the outer plate assembly (7) of the wheel cover is provided below the adjusting arm (5064).

5. The laser flight welding equipment for the longitudinal beams of a cabin on a turntable as described in claim 4, characterized in that, Each of the aforementioned screw hole limiting mechanisms (504) includes a second hydraulic seat (5041) fixedly mounted on the corresponding support frame (502). The output end of the second hydraulic seat (5041) is fixedly provided with a pin (5042) for passing through the bolt hole. The second hydraulic seat (5041) can drive the pin (5042) to push into the corresponding threaded hole on the wheel cover outer plate assembly (7).

6. The laser flight welding equipment for the longitudinal beams of a cabin on a turntable as described in claim 5, characterized in that, Each of the aforementioned limiting components (505) is assembled from the first limiting block and is used to support the adapter wheel cover outer plate assembly (7).

7. The laser flight welding equipment for cabin longitudinal beams on a turntable as described in claim 6, characterized in that, Each of the aforementioned pressing components (5033) is assembled from a second limiting block and is used to clamp the adapter wheel cover outer plate assembly (7).

8. A laser flight welding device for cabin longitudinal beams on a turntable as described in claim 2, 5, or 7, characterized in that, Each of the angle adjustment mechanisms includes an automatic lifting arm (401) movably mounted on the welding turntable (2). The supporting end of the automatic lifting arm (401) is movably connected to the front end of the bearing platform (3). A push guide rail (402) is fixedly mounted on the welding turntable (2). A support seat (403) is fitted on the push guide rail (402). The push guide rail (402) can drive the support seat (403) to move back and forth. A sliding plate (404) is movably mounted on the support seat (403). A sliding block (405) that slides with the sliding plate (404) is fixedly mounted at the bottom of the bearing platform (3).

9. The laser flight welding equipment for the longitudinal beams of a cabin on a turntable as described in claim 8, characterized in that, The welding turntable (2) is provided with a horizontal support device (6) for maintaining the horizontal state of the bearing platform (3).

10. The laser flight welding equipment for the longitudinal beams of a cabin on a turntable as described in claim 9, characterized in that, The horizontal support device (6) includes an electric telescopic rod (601) fixedly connected to the welding turntable (2). A push plate (602) is fixedly provided at the extended end of the electric telescopic rod (601). A limiting seat (603) that is adapted to the shape of the push plate (602) is fixedly provided at the bottom of the bearing platform (3). The electric telescopic rod (601) can push the push plate (602) into the limiting seat (603). Through the cooperation between the push plate (602) and the limiting seat (603), the stability of the bearing platform (3) is maintained.

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