Steel structure welding device

Abstract

The invention provides a steel structure welding device, and belongs to the technical field of welding equipment, the steel structure welding device comprises a wing plate positioning and moving assembly, the wing plate positioning and moving assembly is mounted in a frame body and used for moving, positioning and supporting a wing plate entering the frame body, and the wing plate positioning and moving assembly comprises a moving mechanism and a positioning mechanism; the moving mechanism comprises a conveying part, moving frames and a driving part, the moving frames are horizontally arranged in the frame body in the conveying direction of the conveying assembly and located above the conveying assembly, the moving frames are symmetrically arranged and movably installed in the frame body through linear sliding rail modules, and the moving frames are close to or away from each other through the driving part; the moving direction is perpendicular to the conveying direction of the conveying assembly, and the conveying part is linearly arranged on the moving frame and located below the moving frame. When the welding device is used, the wing plate can be positioned and supported more quickly, the deviation of the wing plate in the welding process is reduced, the welding quality and the working efficiency are improved, and the labor amount of workers is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of welding equipment, and particularly relates to a steel structure welding device. BACKGROUND

[0002] The steel structure beam refers to a beam made of steel, mainly used for bearing horizontal load and bending moment, and is an important force member in a steel structure building. The cross-sectional shape of the steel structure beam can be rectangular, I-shaped, channel-shaped, box-shaped, etc., and different cross-sectional forms are selected according to different load and span requirements.

[0003] The steel structure special-shaped beam refers to a steel structure beam with irregular cross-sectional shape, which is different from the common rectangular, I-shaped, etc. cross section, and is usually used to meet special design requirements or bear special load. The letter-shaped special-shaped beam is one of them, which usually includes H-shaped, I-shaped, T-shaped, C-shaped, U-shaped, K-shaped, etc.

[0004] For the K-shaped special-shaped beam, the welder will press the wing plate in the shape of V on the surface of the web, so that the sharp corner of the V-shaped wing plate abuts against the surface of the web, and then uses the welding gun to weld the gap between the V-shaped wing plate and the web, so that the wing plate and the web are welded into the shape of K. However, in the existing technology, the wing plate needs to be positioned on the web by manual operation before welding. During the welding process, the wing plate is easy to deviate, which affects the welding quality, and the labor intensity of workers is large.

[0005] Therefore, in order to solve the above problems, a welding device capable of better fixing the wing plate and reducing the labor amount of workers is needed. SUMMARY

[0006] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide a steel structure welding device to solve the technical problems of the prior art that the wing plate is easy to deviate during the welding process, which affects the welding quality, and the labor intensity of workers is large.

[0007] To achieve the above-mentioned purpose and other related purposes, the present application provides a steel structure welding device, which comprises a K-shaped steel structure, the K-shaped steel structure comprises a wing plate and a web, the wing plate is arranged in the shape of V, during welding, the web is arranged horizontally, the wing plate abuts on the upper side of the web, the wing plate sharp corner is welded on the surface center axis of the web by a welding gun, and the steel structure welding device further comprises: a conveying assembly for conveying the wing plate and the web; a frame body arranged above the conveying assembly; A wing plate positioning and moving assembly is installed inside the frame to move and position the wing plate that enters the frame. The wing plate positioning and moving assembly includes a moving mechanism and a positioning mechanism. The moving mechanism includes a transport part, a moving frame, and a driving part. The moving frame and the moving part are horizontally arranged inside the frame along the transport direction of the transport assembly and are located above the transport assembly. The moving frames are symmetrically arranged and are movably installed inside the frame via linear slide rail modules. The moving frames are moved closer to or further away from each other by the driving part, and the moving direction is perpendicular to the transport direction of the transport assembly. The transport part is linearly arranged on the moving frame and located below the moving frame. The transport part can change its angle so that it abuts against the inclined surface on the outer side of the wing plate. The positioning mechanism is symmetrically installed in the frame body and is used for positioning and supporting the wing plate; A welding assembly, mounted on the frame, for welding the wing plate to the web plate.

[0008] In this way, the web plate is first lifted onto the transport assembly by a crane, and then the wing plate is placed on the web plate. The transport assembly can be used to initially position the wing plate, and at the same time, the web plate and wing plate can be transported to the bottom of the frame. The wing plate positioning and moving assembly can be used to adjust and support the position of the wing plate so that the position of the wing plate meets the welding requirements. During the wing plate positioning process, the position of the moving frame and the transport part is adjusted according to the size of the wing plate so that the angle of the transport part can abut against the inclined surface on the outer side of the wing plate, thereby better moving the position of the wing plate. This allows the invention to be adapted to wing plates of different sizes.

[0009] Optionally, the drive unit includes a first motor and a first rack. The first motor is fixedly mounted on the frame. The first rack has two racks, which are staggered and have their toothed sides facing each other at intervals. One end of the first rack is fixedly mounted on the movable frame, and the other end slides with the movable frame on the other side through a linear slide rail module. The output end of the first motor is provided with a gear that meshes with both racks simultaneously. Using the two racks, the movable frames on both sides can be pulled closer or further apart under the action of the motor, so that the position of the transport unit can be adapted to different sized wing plates, facilitating the adjustment of the wing plate position.

[0010] The conveying unit includes a fixed frame, a first electric push rod, a rotating frame, a second motor, and conveying rollers. The fixed frame is fixedly mounted on the movable frame. The upper side of the rotating frame is rotatably connected to the lower part of the fixed frame. The two ends of the first electric push rod are rotatably connected to the fixed frame and the rotating frame respectively via hinge seats. The rotating frame is inclined towards the wing plate. Several conveying rollers are linearly rotatably mounted on the rotating frame. The axis of the rotating rollers is horizontally aligned with the inclination angle of the rotating frame. The second motor is fixedly mounted on the rotating frame, and the output end of the second motor is connected to the conveying rollers via a synchronous belt pulley mechanism. By changing the angle of the rotating frame through the electric push rod, the surface of the conveying rollers can be made to fit against the outer inclined surface of the wing plate, thereby driving the wing plate to move when the conveying rollers rotate.

[0011] Optionally, the positioning mechanism is symmetrically arranged within the frame, including a support plate, a third motor, a connecting plate, a second electric push rod, and a mounting plate. The support plate is located within the frame and is positioned along the direction of movement of the steel structure. The connecting plate is rotatably mounted at both ends of the support plate via a rotating shaft. The connecting plate is rotatably mounted at the lower end of the mounting plate, which is vertically fixed to the frame. The third motor is fixedly mounted on the connecting plate. The output end of the third motor is connected to the rotating shaft at one end of the support plate via a synchronous pulley. The two ends of the second electric push rod are respectively connected to the connecting plate and the mounting plate. Through the third motor and the second electric push rod, the angle of the support plate can be changed, allowing the support plate to accommodate wing plates of different sizes and support the outer inclined surface of the wing plate.

[0012] Optionally, the support plate is linearly provided with a plurality of auxiliary support blocks, and a plurality of omnidirectional ball bearings are installed in the auxiliary support blocks. Under the action of the third motor and the second electric push rod, the omnidirectional ball bearings can roll in close contact with the outer surface of the wing plate. By using the omnidirectional ball bearings, the support plate can be moved while providing support.

[0013] Optionally, the welding assembly includes a welding frame, a drive mechanism, and a welding torch moving mechanism. The welding frame is arranged in an n-shape and is mounted on the outer side above the frame body. The welding frame reciprocates above the frame body along the direction of movement of the steel structure via the drive mechanism. The welding torch moving mechanism is symmetrically mounted on the welding frame. The drive mechanism drives the welding torch frame to move linearly, causing the welding torches on both sides to simultaneously weld the joint.

[0014] Optionally, the drive mechanism includes a fourth motor and a ball screw module. Linear guide rail modules are symmetrically arranged above the frame. The welding frame is vertically positioned and fixedly mounted on the slider of the linear guide rail module. The lead screw of the ball screw module is rotatably mounted on the upper side of the frame. The nut of the ball screw module is fixedly inserted into the welding frame. The fourth motor is fixedly mounted on the frame, and its output end is connected to the lead screw of the ball screw module via a synchronous belt pulley mechanism. The motor drives the ball screw, causing the welding torch holder to move linearly, simultaneously welding the joint with the welding torches on both sides.

[0015] Optionally, the welding torch moving mechanism includes a fifth motor, a rotating plate, a sliding seat, and a welding torch holder. The fifth motor is fixedly mounted on the welding frame. The upper end of the rotating plate is rotatably mounted below the welding frame via a rotating shaft, and the lower end is inclined downwards towards the center of the welding frame. The output end of the fifth motor and the rotating shaft of the rotating plate are connected via a synchronous belt pulley mechanism. The sliding seat is slidably mounted on the rotating plate via a linear slide rail module. The welding torch holder is rotatably mounted on the sliding seat via a rotating shaft. A third electric push rod is fixedly mounted on the sliding seat. A second rack is fixedly mounted on the actuating end of the third electric push rod. The second rack and the rotating shaft of the welding torch holder are meshed via gears. The welding torch is fixedly mounted on the welding seat, and the welding torch head is positioned towards the welding area of ​​the wing plate and the web plate. Using the fifth motor and the third electric push rod, the position of the welding torch holder can be moved, thereby adjusting the position of the welding torch on the welding torch holder, allowing the welding torch head to approach the desired welding location for welding.

[0016] Optionally, the axis of rotation of the welding torch holder is inclined upward toward the inner side of the frame.

[0017] Optionally, the conveying assembly includes a conveying platform and a conveyor roller, the conveyor roller being linearly rotatable within the conveying platform and driven to rotate by a motor. The conveyor roller is used to transport the steel structure.

[0018] Optionally, guide mechanisms are provided on both sides of the transport assembly. Each guide mechanism includes a base, a web guide, and a wing guide. The base is symmetrically arranged on both sides of the transport platform. The web guide and the wing guide are both mounted on the base, with the web guide located below the wing guide. Both the web guide and the wing guide have a horizontally arranged fourth electric push rod. The actuating end of the fourth electric push rod is located above the transport platform. A guide roller is rotatably mounted on the actuating end of the fourth electric push rod of the web guide, and the axis of the guide roller is vertically arranged. Two wing guides are vertically arranged, and a guide ball is mounted on the actuating end of the fourth electric push rod of each wing guide. Using these guide mechanisms, the web and wing plates can be kept in the centered position of the transport assembly during movement, facilitating subsequent automatic welding operations. The two vertically arranged web guides can adapt to the V-shaped shape of the wing plates, ensuring stability during movement.

[0019] The beneficial effects of this invention are as follows: When using this invention, the wing plate can be positioned and supported more quickly, reducing the offset of the wing plate during the welding process, improving welding quality and work efficiency, and reducing the workload of workers. Attached Figure Description

[0020] Figure 1 The diagram shown is a schematic representation of the overall structure of the present invention.

[0021] Figure 2 The diagram shown is a structural schematic of the present invention from another orientation after some components have been removed.

[0022] Figure 3 Displayed as Figure 2 Enlarged diagram of point A in the middle.

[0023] Figure 4 Displayed as Figure 2 Enlarged diagram of point B in the middle.

[0024] Figure 5 Displayed as Figure 2 A structural diagram from another angle after removing some components.

[0025] Figure 6 Displayed as Figure 5 Enlarged diagram of point C in the middle. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0027] Please see Figures 1 to 6It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0028] like Figures 1-6 As shown, the K-shaped steel structure 5 includes a wing plate 52 and a web plate 51. The wing plate 52 is V-shaped. During welding, the web plate 51 is horizontally positioned, and the tip of the wing plate 52 abuts against the upper side of the web plate 51. The tip of the wing plate 52 is welded to the central axis of the web plate 51 surface using a welding torch 6.

[0029] A steel structure welding device includes: a transport component 1, a frame 2, a wing plate positioning and moving component 3, and a welding component 4. The frame 2 is erected above the transport component 1, and the wing plate positioning and moving component 3 and the welding component 4 are arranged on the frame 2. The wing plate and the web plate are transported to the bottom of the frame 2 by the transport component 1, the wing plate is positioned and supported by the wing plate positioning and moving component 3, and then welded by the welding component 4.

[0030] In this embodiment, the conveying assembly 1 includes a conveying platform 11 and a conveying roller 12. The conveying roller 12 is linearly rotatable within the conveying platform 11, and its rotation is driven by a motor. Guide mechanisms 13 are symmetrically arranged on both sides of the conveying platform 11 to guide the web and wing plates, ensuring that their positions remain in the center of the conveying platform 11 as they move under the action of the conveying roller 12. The guide mechanism 13 includes a base 131, a web guide 132 for guiding the web, and a wing plate guide for guiding the wing plates. Each has a fourth electric push rod 134. The base 131 is symmetrically arranged on both sides of the conveying platform 11. There are three fourth electric push rods 134 arranged horizontally in the vertical direction from top to bottom. The actuating end of the fourth electric push rod 134 is set towards the middle of the conveying platform 11. The web plate guide also includes a guide roller 132, which is vertically rotatably set at the actuating end of the lowest fourth electric push rod 134. The two upper fourth electric push rods 134 are wing plate guides. The wing plate guide also includes a guide ball 133, which is rotatably set at the actuating end of the fourth electric push rod 134.

[0031] In this embodiment, the frame 2 is mounted on the upper side of the conveying table 11, and the wing plate positioning and moving assembly 3 is mounted on the frame 2. The wing plate positioning and moving assembly 3 includes a moving mechanism for adjusting the position of the wing plate and a positioning mechanism for positioning the wing plate during the welding process. Specifically, the moving mechanism includes a conveying unit 311, a moving frame 312, a first motor 313, and a first rack 314. The moving frame 312 is horizontally arranged inside the frame 2 along the conveying direction of the conveying assembly 1 and is located above the conveying roller 12. The moving frame 312 is movably installed inside the frame 2 via several linear slide rail modules 315 and is symmetrically arranged. The first motor 313 is fixedly installed on the frame 2. There are two first racks 314, which are respectively arranged parallel to the axis of the conveying roller 12, with their toothed sides facing each other at intervals. One end of the first rack 314 facing outward is installed on the moving frame 312, and the other end slides with the moving frame 312 on the other side via the linear slide rail module 315. The output end of the first motor 313 is located in the middle of the two first racks 314 and has a gear that can mesh with the two first racks 314 simultaneously. The conveying unit 311 is linearly installed on the moving frame 312. When the first motor 313 is started, the first motor 313 can rotate forward or backward at the same time, causing the two first racks 314 to drive the moving frame 312 to move closer or further apart, adjusting the position of the transport part 311 so that the transport part 311 can be matched with wing plates of different sizes.

[0032] Specifically, the conveying unit 311 includes a fixed frame 3111, a first electric push rod 3112, a rotating frame 3113, a second motor 3114, and conveying rollers 3115. The fixed frame 3111 is fixedly mounted on the movable frame 312. The upper side of the rotating frame 3113 is rotatably connected to the lower side of the fixed frame 3111. The two ends of the first electric push rod 3112 are rotatably connected to the fixed frame 3111 and the rotating frame 3113 respectively through hinge seats. The rotating frame 3113 is inclined towards the wing plate. Several conveying rollers 3115 are linearly rotatably mounted on the rotating frame 3113. The axis of the conveying rollers 3115 is collinear with the inclination angle of the rotating frame 3113. The second motor 3114 is fixedly mounted on the rotating frame 3113. The output end of the second motor 3114 is connected to the conveying rollers 3115 through a synchronous belt pulley mechanism. The conveying rollers 3115 are also connected to each other through a synchronous belt pulley mechanism. The first electric push rod 3112 can change the angle of the rotating frame 3113, thereby changing the angle of the conveying roller 3115. In conjunction with the moving frame 312, the surface of the conveying roller 3115 can be in contact with the outer surface of the wing plate. After the conveying roller 3115 rotates, it can drive the wing plate to move within the frame 2, so that the position of the wing plate meets the welding requirements.

[0033] Specifically, the positioning mechanism is symmetrically arranged inside the frame 2, including a support plate 321, a third motor 322, a connecting plate 323, a second electric push rod 324, and a mounting plate 325. The support plate 321 is located inside the frame 2 and is arranged along the transport direction. Both ends of the support plate 321 are rotatably mounted with the connecting plate 323 via a rotating shaft. The end of the connecting plate 323 away from the support plate 321 is rotatably mounted on the lower end of the mounting plate 325. The mounting plate 325 is vertically arranged, and its upper end is fixedly mounted on the frame 2. The third motor 322 is fixedly mounted on the connecting plate 323. The output end of the third motor 322 and the rotating shaft at one end of the support plate 321 are connected via a synchronous pulley. The two ends of the second electric push rod 324 are respectively connected to the connecting plate 323 and the mounting plate 325. The third motor 322 can change the angle of the support plate 321, and the second electric push rod 324 can change the angle between the connecting plate 323 and the mounting plate 325, so that the support surface of the support plate 321 can cooperate with the outer surface of the wing plate, which facilitates the support of the wing plate.

[0034] In this embodiment, a plurality of auxiliary support blocks 3211 are linearly arranged on the support plate 321, and a plurality of universal ball bearings 3212 are installed in the auxiliary support blocks 3211. Under the action of the third motor 322 and the second electric push rod 324, the universal ball bearings 3212 can roll and cooperate with the outer side of the wing plate.

[0035] In this embodiment, the welding assembly 4 includes a welding frame 41, a driving mechanism 42, and a welding torch moving mechanism 43. The welding frame 41 is arranged in an n-shape and is mounted on the outer side above the frame 2. The welding frame 41 moves back and forth above the frame 2 along the direction of the steel structure movement via the driving mechanism 42. The welding torch moving mechanism 43 is symmetrically mounted on the welding frame 41.

[0036] Specifically, the drive mechanism 42 includes a fourth motor 421 and a ball screw module 422. The welding frame 41 is vertically arranged and slidably mounted on the frame 2 via a linear slide rail module 423. The moving direction is the same as the conveying direction. The screw of the ball screw module 422 is rotatably mounted on the upper side of the frame 2. The nut of the ball screw module 422 is fixedly inserted into the welding frame 41. The fourth motor 421 is fixedly mounted on the frame 2, and the output end of the fourth motor 421 is connected to the screw of the ball screw module 422 via a synchronous belt pulley mechanism.

[0037] Specifically, the welding torch moving mechanism 43 includes a fifth motor 431, a rotating plate 432, a sliding seat 433, and a welding torch holder 434. The fifth motor 431 is fixedly mounted on the welding frame 41. The upper end of the rotating plate 432 is rotatably mounted below the welding frame 41 via a rotating shaft, and the lower end is inclined downward toward the middle of the welding frame 41. The output end of the fifth motor 431 and the rotating shaft of the rotating plate 432 are connected by a synchronous belt pulley mechanism. The sliding seat 433 is slidably mounted on the rotating plate 432 via a linear slide rail module 435. On the moving plate 432, the welding torch holder 434 is rotatably mounted on the sliding seat 433 via a rotating shaft. The axis of rotation of the welding torch holder 434 is inclined upward towards the inner side of the frame 2. A third electric push rod 436 is fixedly mounted on the sliding seat 433. A second rack 437 is fixedly mounted on the actuating end of the third electric push rod 436. A gear is provided on the rotating shaft of the welding torch holder 434, which meshes with the second rack 437. The welding torch is fixedly mounted on the welding torch holder 434, and the welding torch head is positioned towards the welding area of ​​the wing plate and the web plate. Under the action of the fifth motor 431 and the third electric push rod 436, the position of the welding torch holder 434 changes, thereby bringing the welding torch head closer to and contacting the position to be welded. Under the action of the drive mechanism 42, the welding process is completed in the linear movement of the welding frame 41.

[0038] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A steel structure welding device for welding a K-shaped steel structure, the K-shaped steel structure comprising a flange and a web, the flange being V-shaped; during welding, the web is horizontally positioned, the flange abuts against the upper side of the web, and the pointed corner of the flange is welded to the central axis of the web surface using a welding torch, characterized in that... include: A transport assembly for transporting the wingplate and the web plate; A frame, which is erected above the transport assembly; A wing plate positioning and moving assembly is installed inside the frame to move and position the wing plate that enters the frame. The wing plate positioning and moving assembly includes a moving mechanism and a positioning mechanism. The moving mechanism includes a transport part, a moving frame, and a driving part. The moving frame is horizontally arranged inside the frame along the transport direction of the transport assembly and is located above the transport assembly. The moving frames are symmetrically arranged and are movably installed inside the frame via linear slide rail modules. The moving frames move closer to or further away from each other via the driving part, and the moving direction is perpendicular to the transport direction of the transport assembly. The transport part is linearly arranged on the moving frame and located below the moving frame. The transport part can change its angle so that it abuts against the inclined surface on the outer side of the wing plate. The positioning mechanism is symmetrically installed in the frame body and is used for positioning and supporting the wing plate; A welding assembly, mounted on the frame, for welding the wing plate to the web plate.

2. The steel structure welding device according to claim 1, characterized in that: The drive unit includes a first motor and a first rack. The first motor is fixedly mounted on the frame. There are two first racks, which are arranged in parallel and have their toothed sides facing each other at intervals. One end of the first rack is fixedly mounted on the movable frame, and the other end slides with the movable frame on the other side through a linear slide rail module. The output end of the first motor is provided with a gear that meshes with both racks simultaneously. The conveying unit includes a fixed frame, a first electric push rod, a rotating frame, a second motor, and conveying rollers. The fixed frame is fixedly mounted on the movable frame. The upper side of the rotating frame is rotatably connected to the lower part of the fixed frame. The two ends of the first electric push rod are rotatably connected to the fixed frame and the rotating frame respectively through hinge seats. The rotating frame is inclined toward the wing plate. Several conveying rollers are linearly rotatably mounted on the rotating frame. The axis of the conveying rollers is collinear with the inclination angle of the rotating frame. The second motor is fixedly mounted on the rotating frame. The output end of the second motor is connected to the conveying rollers through a synchronous belt pulley mechanism.

3. The steel structure welding device according to claim 1, characterized in that: The positioning mechanism is symmetrically arranged within the frame and includes a support plate, a third motor, a connecting plate, a second electric push rod, and a mounting plate. The support plate is located within the frame and is arranged along the transport direction. The connecting plate is rotatably mounted on both ends of the support plate via a rotating shaft. The connecting plate is rotatably mounted on the lower end of the mounting plate. The mounting plate is vertically fixed on the frame. The third motor is fixedly mounted on the connecting plate. The output end of the third motor is connected to the rotating shaft at one end of the support plate via a synchronous pulley. The two ends of the second electric push rod are respectively connected to the connecting plate and the mounting plate.

4. The steel structure welding device according to claim 3, characterized in that: The support plate is linearly arranged with several auxiliary support blocks, and several universal ball bearings are installed in the auxiliary support blocks. Under the action of the third motor and the second electric push rod, the universal ball bearings can roll and cooperate with the outer side of the wing plate.

5. The steel structure welding device according to claim 1, characterized in that: The welding assembly includes a welding frame, a drive mechanism, and a welding torch moving mechanism. The welding frame is arranged in an n-shape and is mounted on the outer side above the frame body. The welding frame moves back and forth above the frame body along the direction of movement of the steel structure through the drive structure. The welding torch moving mechanism is symmetrically mounted on the welding frame.

6. The steel structure welding device according to claim 5, characterized in that: The drive mechanism includes a fourth motor and a ball screw module. The welding frame is vertically arranged and slidably mounted on the frame body via a linear slide rail module. The moving direction is the same as the conveying direction. The lead screw of the ball screw module is rotatably mounted on the upper side of the frame body. The nut of the ball screw module is fixedly inserted into the welding frame. The fourth motor is fixedly mounted on the frame body, and the output end of the fourth motor is connected to the lead screw of the ball screw module via a synchronous belt pulley mechanism.

7. The steel structure welding device according to claim 6, characterized in that: The welding torch moving mechanism includes a fifth motor, a rotating plate, a sliding seat, and a welding torch holder. The fifth motor is fixedly mounted on the welding frame. The upper end of the rotating plate is rotatably mounted below the welding frame via a rotating shaft, and the lower end is inclined downward toward the middle of the welding frame. The output end of the fifth motor and the rotating shaft of the rotating plate are connected by a synchronous belt pulley mechanism. The sliding seat is slidably mounted on the rotating plate via a linear slide rail module. The welding torch holder is rotatably mounted on the sliding seat via a rotating shaft. A third electric push rod is fixedly mounted on the sliding seat. A second rack is fixedly mounted on the actuating end of the third electric push rod. A gear is provided on the rotating shaft of the welding torch holder, which meshes with the second rack. The welding torch is fixedly mounted on the welding seat, and the welding torch head is positioned toward the welding joint of the wing plate and the web plate.

8. The steel structure welding device according to claim 7, characterized in that: The axis of rotation of the welding torch holder is inclined upward toward the inside of the frame.

9. The steel structure welding device according to claim 1, characterized in that: The conveying assembly includes a conveying platform and a conveying roller, the conveying roller being arranged linearly within the conveying platform.

10. The steel structure welding device according to claim 9, characterized in that: The conveying assembly is provided with guide mechanisms on both sides. The guide mechanisms include a base, a web guide, and a wing guide. The base is symmetrically arranged on both sides of the conveying platform. The web guide and the wing guide are both mounted on the base. The web guide is located below the wing guide. The web guide and the wing guide each have a horizontally arranged fourth electric push rod. The actuating end of the fourth electric push rod is located above the conveying platform. The actuating end of the fourth electric push rod of the web guide is rotatably equipped with a guide roller. The axis of the guide roller is vertically arranged. There are two wing guides in the vertical direction. The actuating end of the fourth electric push rod of the wing guide is equipped with a guide ball.

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