A laser composite welding system and welding method suitable for special-shaped beam type workpieces

Abstract

This invention relates to the field of laser composite welding technology, specifically to a laser composite welding system suitable for irregularly shaped beam workpieces. The system clamps the irregularly shaped beam workpieces through a clamping mechanism on the upper support frame and a positioning clamping mechanism on the lower support platform, solving the problem of weld seam obstruction in existing technologies and the cumbersome operation of sequentially opening and releasing obstructed weld seams using a cross-clamping mechanism. Simultaneously, the top surface of the clamping block matches the top surface of the thin plate at the bottom of the irregularly shaped beam workpiece, creating clearance space for weld seam welding, preventing the clamping device from welding to the workpiece even with thin plates. Furthermore, the attitude adjustment mechanism can automatically rotate the clamping and positioning clamping mechanisms, and the notch design allows for one-shot welding of curved irregularly shaped beam workpieces with the welding torch, providing continuous, uninterrupted full-seam welding functionality and ensuring weld quality. A welding method is also provided.

Description

Technical Field

[0001] This invention relates to the field of laser composite welding technology, and specifically to a laser composite welding system and welding method suitable for irregularly shaped beam workpieces. Background Technology

[0002] In the field of steel structure manufacturing, especially for small, irregularly shaped beams used in construction, robotic arms, or precision equipment, such as beams with bent ends, particularly those with thinner plates (≤5mm), automated welding faces unique challenges. This is because these workpieces are typically irregular in shape, compact in structure, and have numerous weld seams, which places higher demands on the adaptability and avoidance capabilities of welding fixtures.

[0003] Currently, when using robots for laser-hydraulic welding, the welding torch (such as a combined laser and / or arc welding head) is bulky and needs to maintain a specific welding posture. This can easily cause spatial interference between the tooling fixture's positioning blocks and clamping devices, resulting in torch obstruction. Simultaneously, the clamping device and workpiece are prone to accidental welding together. This problem is particularly pronounced for short, small beam-like workpieces. To ensure weld continuity, existing technologies often employ a "cross-clamping" mechanism, using the staggered movement of the fixtures to create welding space. However, this approach reveals fatal flaws when welding irregularly shaped beams: First, the irregular contours of beams often result in extremely limited fixture space, restricting the travel of the cross-clamping mechanism and making it difficult to completely avoid the welding torch path. Second, due to the short workpiece, the opening and closing of the fixtures relies entirely on high-precision position feedback and interlocking control from sensors. In actual production, if the sensors malfunction, experience delays, or experience system communication failures, the clamping device may fail to open in time, causing the robot to directly impact the welding torch with the fixture or workpiece. Both the welding equipment and the irregularly shaped beam workpieces can be damaged or even scrapped, posing significant production safety risks. Therefore, there is an urgent need for a laser hybrid welding system for irregularly shaped beam workpieces that features an ingenious structural design, eliminates the need for complex sensor linkages, and fundamentally avoids interference. Summary of the Invention

[0004] The purpose of this invention is to provide a laser composite welding system and welding method suitable for irregularly shaped beam workpieces, so as to solve the existing technical problems in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: This application provides a laser composite welding system suitable for irregularly shaped beam workpieces, including a laser composite welding torch, an upper support frame, a lower support platform, a clamping mechanism, and a positioning and clamping mechanism. The laser composite welding torch is driven by a power source to move in different directions and adjust its posture. Multiple sets of clamping mechanisms are provided on the upper support frame, and multiple sets of positioning and clamping mechanisms are provided on the lower support platform. A clamping space for the irregularly shaped beam workpiece is formed between the clamping mechanism and the positioning and clamping mechanism.

[0006] Based on the above technical solution, the clamping mechanism includes a first driving component and a clamping block. The first driving component is disposed on the upper support frame, and the clamping block is fixedly disposed at the output end of the driving component.

[0007] Based on the above technical solution, the positioning and clamping mechanism includes a positioning seat, a support shaft, a positioning support plate, a clamping block, and a linkage component. The positioning seat is fixedly mounted on the lower support platform. The support shaft is slidably connected to the limiting block provided on the positioning seat. The positioning support plate is fixedly sleeved on the top of the support shaft. The clamping blocks are symmetrically arranged on both sides of the positioning support plate. The positioning support plate drives the clamping blocks to move in opposite directions through the linkage component.

[0008] Based on the above technical solution, the linkage component includes a sliding support block, a first connecting rod, a second connecting rod, a sliding seat, and an elastic element. The sliding support block is fixedly sleeved on the support shaft and positioned below the positioning support plate. The first connecting rod and the second connecting rod are mirror images of each other, with one end hinged to the sliding support block and the other end hinged to the sliding seat. The sliding seats are symmetrically arranged on both sides of the positioning support plate and are slidably connected to the positioning seat. The clamping block is fixedly mounted on the sliding seat. The elastic element is sleeved on the support shaft, with one end fixedly mounted on the limiting block and the other end fixedly mounted on the bottom end of the sliding support block.

[0009] Based on the above technical solution, it also includes an attitude adjustment mechanism symmetrically arranged at both ends of the upper support frame and the lower support platform for attitude adjustment of the upper support frame and the lower support platform.

[0010] Based on the above technical solution, the attitude adjustment mechanism includes a rotating frame, a first fixed frame, a second fixed frame, and a driving mechanism. The rotating frame is configured as a C-shaped structure. The first fixed frame and the second fixed frame are symmetrically arranged on the rotating frame. The upper support frame is arranged on the first fixed frame and is driven to slide by the driving mechanism. The lower support platform is fixedly arranged on the second fixed frame. The rotating frame is driven to rotate by a second driving component.

[0011] Based on the above technical solution, the driving mechanism includes a third driving component, a connecting plate, a second guide rail, and a second slider. The third driving component is fixedly mounted on the first fixed frame. The connecting plate is fixedly connected to the upper support frame and is located at the output end of the third driving component. The second guide rail is fixedly mounted on the first fixed frame. The second slider is fixedly mounted on the upper support frame and is slidably connected to the second guide rail.

[0012] Based on the above technical solution, a first guide rail is provided on the positioning seat, and a first slider is provided on the sliding seat, with the first slider slidably connected to the first guide rail.

[0013] Based on the above technical solution, the laser composite welding gun includes a laser head, a rotating mechanism, an arc welding gun, and a laser tracker. The laser head is mounted on the welding gun mounting base, the driving mechanism is sleeved on the bottom end of the laser head, the arc welding gun is mounted on one side of the laser head and is driven to rotate by the rotating mechanism, and the laser tracker is fixedly mounted on the welding gun mounting base.

[0014] This application also provides a welding method using the aforementioned composite welding system suitable for irregularly shaped beam workpieces, comprising the following steps: Step S1: Clamp the workpiece; activate the attitude adjustment mechanism, drive the upper support frame to move, place the irregular beam workpiece on multiple positioning support plates, the positioning support plates and sliding support blocks move downwards synchronously, the first and second connecting rods drive the clamping blocks on both sides of the positioning support plates to slide until they are centered and clamp the irregular beam workpiece; the drive mechanism drives the upper support frame to move in the opposite direction to above the irregular beam workpiece; then the clamping mechanism presses the clamping blocks onto the top surface of the irregular beam workpiece; workpiece clamping is completed. Step S2: Adjust the posture of the laser composite welding gun; set the laser composite welding gun at the weld seam of the irregular beam workpiece, and use a rotating mechanism to adjust the angle between the laser head and the arc welding gun; at the same time, adjust the welding posture of the laser composite welding gun in real time according to the information feedback from the laser tracker. Step S3: Continuous welding of the entire weld seam; After adjusting the welding posture, start the laser composite welding gun to continuously weld the weld seam of the irregular beam workpiece. Step S4, serpentine weld seam welding; after one of the weld seams of the irregular beam workpiece is completed, the second drive component in the attitude adjustment mechanism is used to rotate the rotating frame, and the welding angle between the arc welding gun and the laser head is adjusted by the rotating mechanism to continue to complete the welding of the other side of the weld seam on the same horizontal plane as the previous weld seam, so as to achieve serpentine uninterrupted welding. Step S5: Repeat steps S2-S4 to complete the serpentine welding of the two welds on the other horizontal plane; complete the welding of the irregular beam workpiece.

[0015] The beneficial effects of the technical solution provided by this invention are as follows: This invention provides a composite welding system suitable for irregularly shaped beam workpieces, especially for welding small irregularly shaped beam workpieces. The system uses a clamping mechanism on the upper support frame and a positioning clamping mechanism on the lower support platform to clamp the irregularly shaped beam workpiece, solving the problem of weld seam obstruction in existing technologies and the cumbersome operation of sequentially opening and releasing obstructed weld seams using a cross-clamping mechanism. Simultaneously, the top surface of the clamping block matches the top surface of the thin plate at the bottom of the irregularly shaped beam workpiece, creating a clearance space for weld seam welding, preventing the clamping device from welding to the workpiece even with thin plates. Furthermore, the attitude adjustment mechanism can automatically rotate the clamping and positioning clamping mechanisms. The C-shaped structure of the attitude adjustment mechanism, with its notch design, allows for one-shot welding of curved irregularly shaped beam workpieces with a welding torch, providing continuous, uninterrupted full-seam welding functionality and ensuring weld quality. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the composite welding system in this invention; Figure 2 This is a three-dimensional structural diagram of the welding clamping equipment in this invention; Figure 3 This is a schematic diagram of the positioning and clamping mechanism in this invention; Figure 4 This is a schematic diagram of the attitude adjustment mechanism in this invention; Figure 5 This is a schematic diagram of the laser composite welding gun in this invention. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments: In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0018] In the description of this invention, it should be understood that the terms "left", "right", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0019] like Figures 1 to 5 As shown, a laser composite welding system suitable for irregularly shaped beam workpieces includes a laser composite welding gun 1, an upper support frame 2, a lower support platform 3, a clamping mechanism 4, and a positioning and clamping mechanism 5. Multiple sets of the clamping mechanism 4 are provided on the upper support frame 2, and multiple sets of the positioning and clamping mechanism 5 are provided on the lower support platform 3. A clamping space for the irregularly shaped beam workpiece 30 is formed between the clamping mechanism 4 and the positioning and clamping mechanism 5.

[0020] This invention provides a laser composite welding system suitable for irregularly shaped beam workpieces, especially for positioning and clamping small irregularly shaped beam workpieces during welding. The irregularly shaped beam workpiece 30 is clamped by the clamping mechanism 4 on the upper support frame 2 and the positioning and clamping mechanism 5 on the lower support platform 3, which solves the problem of weld seam obstruction in the prior art, and also solves the problem of cumbersome operation of sequentially opening and releasing the obstructed weld seam through the cross clamping mechanism. At the same time, the top surface of the clamping block is adapted to the top surface of the bottom thin plate of the irregularly shaped beam workpiece, forming a clearance space for weld seam welding, so that even in the case of thin plates, the clamping device will not be welded to the workpiece.

[0021] In addition, a posture adjustment mechanism 6 is provided, which can drive the clamping mechanism and the positioning clamping mechanism to achieve automatic rotation. The posture adjustment mechanism is designed with a C-shape and a notch design to enable one-shot welding of curved, irregularly shaped beams, providing continuous, uninterrupted full-seam welding and ensuring weld quality. Multiple sets of the clamping mechanism and the positioning clamping mechanism are provided for better control of welding deformation.

[0022] More preferably, the positioning and clamping mechanism adopts a modular design, which is more convenient to use and is suitable for clamping and welding two types of workpieces with different irregular shapes.

[0023] Based on the above technical solution, the clamping mechanism 4 includes a first driving component 41 and a clamping block 42. The first driving component 41 is disposed on the upper support frame 2, and the clamping block 42 is fixedly disposed at the output end of the first driving component 41.

[0024] Based on the above technical solution, the positioning and clamping mechanism 5 includes a positioning seat 51, a support shaft 52, a positioning support plate 53, clamping blocks 54, and a linkage assembly. The positioning seat 51 is fixedly mounted on the lower support platform 3. The support shaft 52 is slidably connected to the limiting blocks 511 provided on the positioning seat 51. The positioning support plate 53 is fixedly sleeved on the top end of the support shaft 52. The clamping blocks 54 are symmetrically arranged on both sides of the positioning support plate 53. The positioning support plate 53 drives the clamping blocks 54 to move in opposite directions through the linkage assembly. More preferably, multiple limiting blocks 511 are provided along the vertical direction of the support shaft 52.

[0025] Based on the above technical solution, the linkage component includes a sliding support block 551, a first connecting rod 552, a second connecting rod 553, a sliding seat 554, and an elastic element. The sliding support block 551 is fixedly sleeved on the support shaft 52 and disposed below the positioning support plate 53. The first connecting rod 552 and the second connecting rod 553 are mirror images of each other, with one end hinged to the sliding support block 551 and the other end hinged to the sliding seat 554. The sliding seat 554 is symmetrically disposed on both sides of the positioning support plate 53 and slidably connected to the positioning seat 51. The clamping block 54 is fixedly disposed on the sliding seat 554. The elastic element is sleeved on the support shaft 52, with one end fixedly disposed on the limiting block 511 and the other end fixedly disposed on the bottom end of the sliding support block 551. Preferably, the elastic element is a spring.

[0026] The positioning and clamping mechanism 5 can achieve automatic centering and clamping, and its structure is more compact. When working together with the multiple sets of pressing mechanisms set above, it can better control welding deformation and ensure the quality of weld processing.

[0027] Based on the above technical solution, a first guide rail 56 is provided on the positioning seat 51, and a first slider 57 is provided on the sliding seat 554. The first slider 57 is slidably connected to the first guide rail 56.

[0028] When the positioning and clamping mechanism is in operation, the workpiece to be welded is placed on the positioning support plate. Under the action of its weight, the positioning support plate slides downward on the support shaft. The positioning support plate drives the sliding support block to slide downward as well. At the same time, the first and second connecting rods hinged to the sliding support block move synchronously, causing the sliding seats connected to the other end to interact and move closer to each other. This, in turn, causes the clamping block on them to clamp the workpiece to be welded. Meanwhile, when the sliding support block moves downward, it presses against the elastic element at the bottom. After welding is completed and the welded workpiece is removed, the sliding support block and the positioning support plate move upward under the action of the elastic element and automatically reset. At the same time, the first and second connecting rods drive the two sliding seats to move in the opposite direction, thus releasing the workpiece clamping.

[0029] Based on the above technical solution, it also includes an attitude adjustment mechanism 6 symmetrically arranged at both ends of the upper support frame 2 and the lower support platform 3 for attitude adjustment of the upper support frame 2 and the lower support platform 3.

[0030] Based on the above technical solution, the attitude adjustment mechanism 6 includes a rotating frame 61, a first fixed frame 62, a second fixed frame 63, and a driving mechanism 64. The rotating frame 61 is configured as a C-shaped structure. The first fixed frame 62 and the second fixed frame 63 are symmetrically arranged on the rotating frame 61. The upper support frame 2 is arranged on the first fixed frame 62 and is driven to slide by the driving mechanism 64. The lower support platform 3 is fixedly arranged on the second fixed frame 63. The rotating frame 61 is driven to rotate by the second driving component.

[0031] Based on the above technical solution, the driving mechanism 64 includes a third driving component 641, a connecting plate 642, a second guide rail 643, and a second slider 644. The third driving component 641 is fixedly mounted on the first fixed frame 62. The connecting plate 642 is fixedly connected to the upper support frame 2 and is located at the output end of the third driving component 641. The second guide rail 643 is fixedly mounted on the first fixed frame 62. The second slider 644 is fixedly mounted on the upper support frame 2 and is slidably connected to the second guide rail 643.

[0032] Preferably, the second drive component is configured as a drive motor. Preferably, the first drive component 41 and the third drive component 641 are configured as cylinders and electric push rods, as long as they can drive the linear reciprocating motion of the clamping block, connecting plate, or corresponding components.

[0033] When the attitude adjustment mechanism 6 is working, the drive mechanism 64 drives the upper support frame 2 to move out of the clamping space for the workpiece. After the irregular beam workpiece is clamped, the drive mechanism 64 drives the upper support frame 2 to move in the opposite direction to above the irregular beam workpiece 30, so as to facilitate the clamping mechanism to clamp it. At the same time, when welding the double-sided weld, the rotating frame 61 in the attitude adjustment mechanism 6 rotates, causing the irregular beam workpiece clamped on it to flip, thus completing the welding of the double-sided weld. The rotating frame 61 is set with a C-shaped structure, and its notch design can be used with the welding torch to achieve one-torque welding of curved irregular beam workpieces, which has high welding efficiency and can ensure the quality of the weld.

[0034] Preferably, the power source is a combination of a cantilever gantry or a robotic arm and a welding robot, and the laser composite welding torch is located at the free end of the welding robot.

[0035] Based on the above technical solution, the laser composite welding torch 1 includes a laser head 11, a rotating mechanism 12, an arc welding torch 13, and a laser tracker 14. The laser head 11 is mounted on a welding torch mounting base 15. The rotating mechanism 12 is sleeved on the bottom end of the laser head 11. The arc welding torch 13 is located on one side of the laser head 11 and is driven to rotate by the rotating mechanism 12. The laser tracker 14 is fixedly mounted on the welding torch mounting base 15. Preferably, the rotating mechanism 12 can be driven by a motor to rotate the sleeve. The arc welding torch is located on the outer wall of the sleeve, so that the rotating mechanism drives the arc welding torch to rotate, thereby completing the corresponding angle adjustment.

[0036] Preferably, the position and posture of the laser composite welding torch 1 are adjusted by a cantilever gantry and a welding robot; after completing the welding of one of the welds on the irregular beam workpiece 30, the second drive component 65 in the posture adjustment mechanism 6 is used to rotate the rotating frame 61, and the welding angle between the arc welding torch 13 and the laser head 11 is adjusted by the rotation mechanism 12 to continue welding the other side of the weld on the same horizontal plane as the previous weld, thereby achieving serpentine continuous welding; improving welding efficiency and ensuring welding quality.

[0037] It is understood that the specific structures of the laser head 11, arc welding gun 13 and laser tracker 14 mentioned above can be obtained from the prior art, and this application does not improve their specific structures.

[0038] This application also provides a laser composite welding method, employing the aforementioned composite welding system suitable for irregularly shaped beam workpieces, comprising the following steps: Step S1: Clamp the workpiece; activate the attitude adjustment mechanism, drive the upper support frame to move, place the irregular beam workpiece on multiple positioning support plates, the positioning support plates and sliding support blocks move downwards synchronously, the first and second connecting rods drive the clamping blocks on both sides of the positioning support plates to slide until they are centered and clamp the irregular beam workpiece; the drive mechanism drives the upper support frame to move in the opposite direction to above the irregular beam workpiece; then the clamping mechanism presses the clamping blocks onto the top surface of the irregular beam workpiece; workpiece clamping is completed. Step S2: Adjust the posture of the laser composite welding gun; use a cantilever gantry and welding robot to adjust the position and angle of the laser composite welding, and set it at the weld seam of the irregular beam workpiece. Use a rotating mechanism to adjust the angle between the laser head and the arc welding gun; at the same time, adjust the welding posture of the laser composite welding gun in real time according to the information feedback from the laser tracker. Step S3: Continuous welding of the entire weld seam; After adjusting the welding posture, start the laser composite welding gun to continuously weld the weld seam of the irregular beam workpiece. Step S4, serpentine weld seam welding; after one of the weld seams of the irregular beam workpiece is completed, the second drive component in the attitude adjustment mechanism is used to rotate the rotating frame, and the welding angle between the arc welding gun and the laser head is adjusted by the rotating mechanism to continue to complete the welding of the other side of the weld seam on the same horizontal plane as the previous weld seam, so as to achieve serpentine uninterrupted welding. Step S5: Repeat steps S2-S4 to complete the serpentine welding of the two welds on the other horizontal plane; complete the welding of the irregular beam workpiece.

[0039] The foregoing has shown and described the basic principles and main features of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments. Therefore, the embodiments should be considered as exemplary and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of the equivalents of the claims be included within the present invention.

[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 laser hybrid welding system suitable for irregularly shaped beam workpieces, characterized in that, It includes a laser composite welding gun, an upper support frame, a lower support platform, a clamping mechanism, and a positioning and clamping mechanism. The laser composite welding gun is driven by a power source to move in different directions and adjust its posture. Multiple sets of clamping mechanisms are provided on the upper support frame, and multiple sets of positioning and clamping mechanisms are provided on the lower support platform. The clamping mechanism and the positioning and clamping mechanism form a clamping space for irregular beam-like workpieces.

2. The laser composite welding system for irregularly shaped beam workpieces according to claim 1, characterized in that, The clamping mechanism includes a first driving component and a clamping block. The first driving component is mounted on the upper support frame, and the clamping block is fixedly mounted on the output end of the driving component.

3. The laser composite welding system for irregularly shaped beam workpieces according to claim 1, characterized in that, The positioning and clamping mechanism includes a positioning seat, a support shaft, a positioning support plate, clamping blocks, and a linkage assembly. The positioning seat is fixedly mounted on the lower support platform. The support shaft is slidably connected to the limiting block mounted on the positioning seat. The positioning support plate is fixedly sleeved on the top of the support shaft. The clamping blocks are symmetrically arranged on both sides of the positioning support plate. The positioning support plate drives the clamping blocks to move in opposite directions through the linkage assembly.

4. The laser composite welding system for irregularly shaped beam workpieces according to claim 3, characterized in that, The linkage assembly includes a sliding support block, a first connecting rod, a second connecting rod, a sliding seat, and an elastic element. The sliding support block is fixedly sleeved on the support shaft and positioned below the positioning support plate. The first connecting rod and the second connecting rod are mirror images of each other, with one end hinged to the sliding support block and the other end hinged to the sliding seat. The sliding seats are symmetrically arranged on both sides of the positioning support plate and are slidably connected to the positioning seat. The clamping block is fixedly mounted on the sliding seat. The elastic element is sleeved on the support shaft, with one end fixedly mounted on the limiting block and the other end fixedly mounted on the bottom end of the sliding support block.

5. A laser composite welding system suitable for irregularly shaped beam workpieces according to claim 1, characterized in that, It also includes attitude adjustment mechanisms symmetrically arranged at both ends of the upper support frame and the lower support platform for attitude adjustment of the upper support frame and the lower support platform.

6. A laser composite welding system for irregularly shaped beam workpieces according to claim 5, characterized in that, The attitude adjustment mechanism includes a rotating frame, a first fixed frame, a second fixed frame, and a driving mechanism. The rotating frame is configured as a C-shaped structure. The first fixed frame and the second fixed frame are symmetrically arranged on the rotating frame. The upper support frame is arranged on the first fixed frame and is driven to slide by the driving mechanism. The lower support platform is fixedly arranged on the second fixed frame. The rotating frame is driven to rotate by a second driving component.

7. A laser composite welding system for irregularly shaped beam workpieces according to claim 6, characterized in that, The driving mechanism includes a third driving component, a connecting plate, a second guide rail, and a second slider. The third driving component is fixedly mounted on a first fixed frame. The connecting plate is fixedly connected to the upper support frame and is located at the output end of the third driving component. The second guide rail is fixedly mounted on the first fixed frame. The second slider is fixedly mounted on the upper support frame and is slidably connected to the second guide rail.

8. A laser composite welding system suitable for irregularly shaped beam workpieces according to claim 3, characterized in that, The positioning seat is provided with a first guide rail, and the sliding seat is provided with a first slider, which is slidably connected to the first guide rail.

9. A laser composite welding system for irregularly shaped beam workpieces according to claim 1, characterized in that, The laser composite welding torch includes a laser head, a rotating mechanism, an arc welding torch, and a laser tracker. The laser head is mounted on a welding torch mounting base, the driving mechanism is sleeved on the bottom end of the laser head, the arc welding torch is mounted on one side of the laser head and is driven to rotate by the rotating mechanism, and the laser tracker is fixedly mounted on the welding torch mounting base.

10. A welding method, characterized in that, The composite welding system for irregularly shaped beam workpieces according to any one of claims 1-9 includes the following steps: Step S1: Clamp the workpiece; activate the attitude adjustment mechanism, drive the upper support frame to move, place the irregular beam workpiece on multiple positioning support plates, the positioning support plates and sliding support blocks move downwards synchronously, the first and second connecting rods drive the clamping blocks on both sides of the positioning support plates to slide until they are centered and clamp the irregular beam workpiece; the drive mechanism drives the upper support frame to move in the opposite direction to above the irregular beam workpiece; then the clamping mechanism presses the clamping blocks onto the top surface of the irregular beam workpiece; workpiece clamping is completed. Step S2: Adjust the posture of the laser composite welding gun; set the laser composite welding gun at the weld seam of the irregular beam workpiece, and use a rotating mechanism to adjust the angle between the laser head and the arc welding gun; at the same time, adjust the welding posture of the laser composite welding gun in real time according to the information feedback from the laser tracker. Step S3: Continuous welding of the entire weld seam; After adjusting the welding posture, start the laser composite welding gun to continuously weld the weld seam of the irregular beam workpiece. Step S4, serpentine weld seam welding; after one of the weld seams of the irregular beam workpiece is completed, the second drive component in the attitude adjustment mechanism is used to rotate the rotating frame, and the welding angle between the arc welding gun and the laser head is adjusted by the rotating mechanism to continue to complete the welding of the other side of the weld seam on the same horizontal plane as the previous weld seam, so as to achieve serpentine uninterrupted welding. Step S5: Repeat steps S2-S4 to complete the serpentine welding of the two welds on the other horizontal plane; complete the welding of the irregular beam workpiece.

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