Automatic welding device for steel structure production line

Abstract

The invention relates to the technical field of welding devices, in particular to an automatic welding device for a steel structure production line, which comprises a welding assembly and a welding assembly, the protection assembly comprises a housing arranged at the front end of the welding machine head, scrapers arranged at the bottoms of the front end and the rear end of the housing and rollers arranged on the two sides of the housing. The sweeping assembly comprises a guide cylinder arranged on the inner wall of the housing, a shaft rod arranged in the guide cylinder and a brush cylinder arranged at the other end of the shaft rod; the dust removal assembly comprises a dust collection box arranged at the top in the housing, a plug plate arranged in the dust collection box and a dust suction opening formed in the bottom surface of the dust collection box; the transmission assembly comprises an eccentric disc arranged at the end part of the guide cylinder; the housing rotates to drive the brush cylinder to rotate through the shaft rod and meanwhile linearly reciprocate, and the shaft rod drives the plug plate to linearly reciprocate through the eccentric disc. Welding and surface cleaning can be completed synchronously, and therefore interference of the independent cleaning procedure on the welding process is reduced.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to an automatic welding device for a steel structure production line. Background Technology

[0002] H-beams are a commonly used profile in steel structure engineering, widely used in the manufacturing of industrial plants, bridges, and large steel structure components. During the production of H-beams, welding is typically required between the flanges and the web. Submerged arc welding is widely used in H-beam production lines due to its high welding efficiency and stable weld formation.

[0003] On existing H-beam submerged arc welding production lines, to ensure welding quality, the areas to be welded are typically ground before the welding process to remove oxide scale, oil, and other impurities from the steel surface, thus providing a more ideal welding interface for subsequent welding. However, in actual production, a certain time interval inevitably exists between these two processes.

[0004] Because it is difficult to achieve a completely dust-free environment in steel structure production workshops, during the storage or turnover of H-beams after grinding and before entering the submerged arc welding process, the surface to be welded is prone to re-adhere to dust, metal shavings or other impurities in the air, thus affecting the original grinding effect.

[0005] When impurities re-adhere to the surface of H-beams before welding, cleaning or grinding them again before welding will increase additional processes and labor costs, affect production cycle and reduce production efficiency. However, if submerged arc welding is performed directly without cleaning, the weld formation quality may be affected due to insufficient cleanliness of the welding interface, or even welding defects may occur, thereby reducing the stability of welding quality. Summary of the Invention

[0006] In view of the problem in the above or existing technology of how to avoid the re-adhesion of impurities on the surface to be welded due to the time interval between grinding and welding in the production process of H-beam submerged arc welding without adding repeated grinding steps, the present invention is proposed.

[0007] Therefore, the purpose of this invention is to provide an automatic welding device for a steel structure production line.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0009] An automatic welding device for a steel structure production line includes:

[0010] Welding components, including the welding head;

[0011] The protective assembly includes a cover disposed at the front end of the welding head, scrapers disposed at the bottom of the front and rear ends of the cover, and rollers disposed on both sides of the cover.

[0012] The cleaning assembly includes a guide cylinder disposed on the inner wall of the housing, a shaft disposed inside the guide cylinder, and a brush cylinder disposed at the other end of the shaft;

[0013] The dust removal assembly includes a dust collection box disposed at the top of the housing, a plug plate disposed inside the dust collection box, and a dust suction port opened on the bottom surface of the dust collection box;

[0014] The transmission assembly includes an eccentric disc disposed at the end of the guide cylinder;

[0015] The rotation of the cover drives the brush cylinder to rotate while simultaneously reciprocating linearly via a shaft, and the shaft drives the stopper plate to reciprocate linearly via an eccentric disc.

[0016] As a preferred embodiment of the automatic welding device for steel structure production line of the present invention, the welding assembly further includes a gantry frame, a traveling frame disposed at the bottom of both sides of the gantry frame, and a lifting frame disposed at the top of both sides of the gantry frame, wherein the welding head is disposed at the end of the lifting frame.

[0017] In a preferred embodiment of the automatic welding device for the steel structure production line of the present invention, the rollers are rotatably mounted on the outer walls of both sides of the cover, and a spring telescopic rod is provided between the top surface of the scraper and the bottom surface of the cover.

[0018] As a preferred embodiment of the automatic welding device for steel structure production line of the present invention, wherein: a pin is provided at the center of the end face of the roller, a square groove is provided at the end face of the shaft, and the ends of the pins are located inside the square groove and are axially slidably connected to each other.

[0019] As a preferred embodiment of the automatic welding device for steel structure production line of the present invention, the inner wall of the guide cylinder is provided with a positioning slider, and the outer wall of the end of the shaft is provided with a limiting groove, the limiting groove being located inside the positioning slider and slidingly fitting with each other.

[0020] As a preferred embodiment of the automatic welding device for steel structure production line of the present invention, the positioning slider is composed of two semi-circular grooves and two oblique arc grooves. The two semi-circular grooves are respectively disposed at the upper and lower ends of the guide cylinder and distributed on both sides of the guide cylinder. The two oblique arc grooves are respectively connected between the ends of the two semi-circular grooves.

[0021] As a preferred embodiment of the automatic welding device for steel structure production line of the present invention, the eccentric disk is provided with a sleeve hole for the shaft to pass through, the shaft and the sleeve hole are axially slidably connected, and the shaft and the sleeve hole are mutually engaged in the circumferential direction.

[0022] As a preferred embodiment of the automatic welding device for steel structure production line of the present invention, wherein: the dust collection box has an air chamber inside, the plug plates are located inside the air chamber and slide laterally against each other, the top surface of the cover has an exhaust port connected to the air chamber, the dust suction port is connected to the air chamber, and a one-way valve is provided inside the ports of the dust suction port and the exhaust port.

[0023] As a preferred embodiment of the automatic welding device for steel structure production line of the present invention, wherein: a drive frame is provided on the outer side of the dust collection box, one end of the drive frame movably penetrates through the air cavity and is connected to the outer wall of the plug plate, and a crossbar is provided on the other end of the drive frame.

[0024] As a preferred embodiment of the automatic welding device for steel structure production line of the present invention, the outer circumferential surface of the eccentric disk is provided with a connecting frame, the outer wall of the end of the connecting frame is longitudinally provided with a mounting hole, and the end of the crossbar is provided inside the mounting hole and is slidably connected up and down.

[0025] The beneficial effects of the automatic welding device for steel structure production lines of the present invention are as follows: The present invention enables welding, surface cleaning and dust treatment to be completed simultaneously through the cooperation of welding components, protective components, cleaning components, dust removal components and transmission components, thereby reducing the interference of independent cleaning processes on the welding process;

[0026] By using the contact relationship between the rollers in the protective assembly and the surface of the steel structure to be welded, the passive rotational force generated during the movement of the welding device is introduced into the cleaning assembly and the dust removal assembly. This allows the brush to achieve a multi-angle, repeated cleaning effect on the surface of the welding area through the combination of rotation and reciprocating motion, which helps to improve the adequacy of surface treatment before welding. At the same time, the dust removal assembly uses the same transmission path to achieve the functions of dust suction or dust blowing, so that the dust swept off can be dealt with in a timely manner and avoids accumulation in the welding area.

[0027] It enables real-time cleaning of the welding area surface during welding operations, improving the continuity and stability of welding operations, and reducing the need for manual intervention and additional equipment. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of the automatic welding device for a steel structure production line.

[0030] Figure 2 This is a schematic diagram of the protective components of the automatic welding device in a steel structure production line.

[0031] Figure 3 This is a schematic diagram of the cleaning component structure of the automatic welding device in a steel structure production line.

[0032] Figure 4 This is a schematic diagram of the transmission components of an automatic welding device for a steel structure production line.

[0033] Figure 5 This is a schematic diagram of the dust removal component of the automatic welding device in a steel structure production line.

[0034] Figure 6 This is a schematic diagram of the cleaning component structure of the automatic welding device in a steel structure production line.

[0035] Figure 7 This is a schematic diagram of the guide cylinder structure of the automatic welding device in a steel structure production line.

[0036] In the diagram: 1. Welding assembly; 11. Gantry frame; 12. Traveling frame; 13. Lifting frame; 14. Welding head; 2. Protective assembly; 21. Cover; 22. Spring telescopic rod; 23. Scraper; 24. Roller; 3. Cleaning assembly; 31. Brush cylinder; 32. Shaft; 33. Guide cylinder; 34. Pin; 35. Square groove; 36. Limiting slide groove; 37. Positioning slider; 4. Dust removal assembly; 41. Dust collection box; 42. Dust suction port; 43. One-way valve; 44. Exhaust port; 45. Air chamber; 46. Plug plate; 47. Drive frame; 5. Transmission assembly; 51. Eccentric disc; 52. Connecting frame; 53. Mounting hole; 54. Crossbar; 55. Sleeve hole. Detailed Implementation

[0037] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0040] Example 1

[0041] Reference Figures 1 to 7 This is the first embodiment of the present invention. This embodiment provides an automatic welding device for a steel structure production line, which can simultaneously complete the protection of the welding area, surface cleaning and dust treatment during the welding operation, thereby providing a stable and clean welding interface for the welding operation. It includes a welding component 1, a protection component 2, a cleaning component 3, a dust removal component 4 and a transmission component 5.

[0042] Specifically, welding assembly 1 includes a welding head 14, a gantry frame 11, a traveling frame 12 located at the bottom of both sides of the gantry frame 11, and a lifting frame 13 located at the top of the gantry frame 11. The welding head 14 is located at the end of the lifting frame 13. The gantry frame 11 spans over the steel structure to be welded that has been placed. The lifting frame 13 drives the welding head 14 to move closer to or further away from the steel structure to be welded in a vertical direction to complete the height adjustment before welding. The traveling frame 12 is used to drive the gantry frame 11 to move along the production line track, so that the welding head 14 moves along the welding path of the steel structure to be welded. In the welding operation, the steel structure to be welded is placed with the welding end tip facing down. After the flux is fed in under the action of gravity, the welding head 14 moves along the surface of the steel structure with the gantry frame 11 to perform welding, thereby completing the welding operation.

[0043] The protective component 2 includes a cover 21 located at the front end of the welding head 14, scrapers 23 located at the bottom of the front and rear ends of the cover 21, and rollers 24 located on both sides of the cover 21. The rollers 24 are rotatably mounted on the outer walls of both sides of the cover 21. A spring telescopic rod 22 is provided between the top surface of the scraper 23 and the bottom surface of the cover 21. The cover 21 is used to form a protective covering during the cleaning process. The scraper 23 scrapes and cleans the attachments in front of the welding area. The rollers 24 are in contact with the inner wall surface of the steel structure to be welded during operation. They are passively rotated under the action of friction as the gantry 11 moves. The spring telescopic rod 22 provides a continuous elastic thrust to the scraper 23, so that the scraper 23 always keeps in close contact with the surface of the steel structure to be welded.

[0044] The cleaning assembly 3 includes a guide cylinder 33 disposed on the inner wall of the housing 21, a shaft 32 disposed inside the guide cylinder 33, and a brush cylinder 31 disposed at the other end of the shaft 32. The guide cylinder 33 limits the movement trajectory of the shaft 32, the shaft 32 transmits power, and the brush cylinder 31 cleans the surface of the steel structure to be welded.

[0045] The dust removal assembly 4 includes a dust collection box 41 disposed at the top inside the cover 21, a plug plate 46 disposed inside the dust collection box 41, and a dust suction port 42 opened on the bottom surface of the dust collection box 41. The dust collection box 41 is used to form airflow, and the plug plate 46 generates air pressure changes inside the dust collection box 41 to realize gas exchange.

[0046] The transmission assembly 5 includes an eccentric disk 51 disposed at the end of the guide cylinder 33. The eccentric disk 51 is used to convert the rotational motion into reciprocating motion to drive the internal components of the vacuuming assembly 4 to move.

[0047] The rotation of the cover 21 drives the brush cylinder 31 to rotate while simultaneously reciprocating linearly via the shaft 32. The shaft 32 drives the stopper plate 46 to reciprocate linearly via the eccentric disk 51.

[0048] In use, the gantry frame 11 uses the lifting frame 13 to bring the welding head 14 close to the placed steel structure to be welded. The gantry frame 11 travels along the track via the traveling frame 12. After the flux is fed in by gravity, the welding head 14 can be used to weld along the workpiece.

[0049] The roller 24 of the protective component 2 is attached to the inner wall surface of the steel structure to be welded. During the movement of the gantry frame 11, it is passively rotated due to friction. The roller 24 transmits the rotational force to the shaft 32 through the pin 34. The limiting groove 36 on the outer wall of the shaft 32 rotates circumferentially with the shaft 32. The limiting groove 36 moves along the positioning slider 37 of the guide cylinder 33. Since the guide cylinder 33 is fixed to the inner wall of the cover 21 and the shaft 32 slides against the guide cylinder 33, the shaft 32 moves linearly back and forth along the trajectory of the positioning slider 37 through the limiting groove 36. The shaft 32 drives the brush cylinder 31 to move linearly back and forth while rotating. Under the dual movement, the brush cylinder 31 achieves a mesh-like coverage of the surface of the steel structure to be welded, ensuring that the surface of the steel structure to be welded is cleaned multiple times by the brush cylinder 31 at different angles, providing an ideal interface for welding.

[0050] During rotation, the shaft 32 drives the eccentric disk 51 to rotate through the sleeve hole 55. The eccentric disk 51 realizes the reciprocating motion of the connecting frame 52 through the eccentric motion. The connecting frame 52 pushes and pulls the crossbar 54 obliquely through the mounting hole 53. The up and down sliding of the crossbar 54 relative to the mounting hole 53 can be used to decompose the longitudinal force in the oblique force. The lateral force in the oblique force acts on the drive frame 47 through the crossbar 54. Under the lateral pushing and pulling force, the drive frame 47 drives the plug plate 46 to move back and forth. The dust collection assembly 4 can adjust the mode by the installation direction of the one-way valve 43.

[0051] It includes a blowing mode and a suction mode. In suction mode, when the plug plate 46 is pushed inside the air chamber 45, the one-way valve 43 closes the suction port 42, while the one-way valve 43 at the exhaust port 44 opens. The air inside the air chamber 45 is released through the exhaust port 44 under the compression of the plug plate 46. When the plug plate 46 is pulled back, the one-way valve 43 closes the exhaust port 44, and the one-way valve 43 at the suction port 42 opens. The air chamber 45 is formed by the plug plate 46, and the dust swept down is sucked up through the suction port 42.

[0052] In the dust blowing mode, as the plug plate 46 is pushed inside the air chamber 45, the one-way valve 43 closes the exhaust port 44, while the one-way valve 43 at the suction port 42 opens. The air inside the air chamber 45 is released through the exhaust port 44 under the compression of the plug plate 46, blowing away the dust that has been swept away. As the plug plate 46 is pulled back, the one-way valve 43 closes the suction port 42, and the one-way valve 43 at the exhaust port 44 opens, preventing the plug plate 46 from being pulled back through the suction port 42 in the dust blowing mode.

[0053] The scraper 23 is kept in close contact with the surface of the steel structure to be welded under the push of the spring telescopic rod 22. The scraper 23 follows the gantry frame 11 to scrape and clean the surface of the steel structure to be welded. The cover 21 covers the cleaning component 3 and the dust collection component 4 to ensure that the cleaning component 3 and the dust collection component 4 are not disturbed by the outside world during the cleaning process. At the same time, it works synchronously with the welding component 1 to ensure the timeliness of cleaning.

[0054] In summary, this embodiment, through the cooperation of welding component 1, protective component 2, cleaning component 3, dust collection component 4 and transmission component 5, enables the welding operation and the surface cleaning process before welding to be carried out simultaneously. Through the synergistic effect of scraper 23, brush 31 and dust collection component 4, the surface of the steel structure to be welded can be continuously cleaned during the welding process, reducing the impact of dust and attached impurities on the welding interface, thereby providing stable, continuous and relatively clean working conditions for the welding operation.

[0055] Example 2

[0056] Reference Figures 1 to 7 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a cleaning component 3 for an automatic welding device for a steel structure production line.

[0057] Specifically, a pin 34 is provided at the center of the end face of the roller 24, and a square groove 35 is provided at the end face of the shaft 32. The end of the pin 34 is located inside the square groove 35 and is axially slidably connected to each other. The pin 34 is used to transmit the rotational force of the roller 24 to the shaft 32, so that the roller 24 can drive the shaft 32 to rotate synchronously when it is passively rotating, and at the same time, the shaft 32 is allowed to make axial displacement relative to the roller 24.

[0058] The inner wall of the guide cylinder 33 is provided with a positioning slider 37, and the outer wall of the end of the shaft 32 is provided with a limiting groove 36. The limiting groove 36 is located inside the positioning slider 37 and slides against each other. During the rotation of the shaft 32, it is constrained by the trajectory of the positioning slider 37. The positioning slider 37 is composed of two semi-circular grooves and two oblique arc grooves. The two semi-circular grooves are respectively located at the upper and lower ends of the guide cylinder 33 and distributed on both sides of the guide cylinder 33. The two oblique arc grooves are respectively connected between the ends of the two semi-circular grooves, which are used to guide the path movement during the rotation of the shaft 32, thereby causing the shaft 32 to move axially back and forth.

[0059] The eccentric disk 51 has a sleeve hole 55 through which the shaft 32 passes. The shaft 32 and the sleeve hole 55 are axially slidably connected. The shaft 32 does not affect the rotation of the eccentric disk 51 when it reciprocates. The shaft 32 and the sleeve hole 55 are engaged in the circumferential direction to ensure that the rotation of the shaft 32 can be transmitted to the eccentric disk 51.

[0060] The rest of the structure is the same as in Example 1.

[0061] During operation, the gantry 11 moves along the production line track under the drive of the traveling frame 12. The cover 21 moves synchronously with the welding head 14. The roller 24 always adheres to the inner wall surface of the steel structure to be welded and rotates passively under the action of friction. The rotation of the roller 24 is transmitted to the shaft 32 through the pin 34, causing the shaft 32 to rotate accordingly. Due to the cooperation between the limiting groove 36 on the outer wall of the shaft 32 and the positioning slider 37 on the inner wall of the guide cylinder 33, the shaft 32 is forced to undergo axial displacement along the trajectory of the positioning slider 37 during rotation, thereby forming a stable linear reciprocating motion within the guide cylinder 33. The shaft 32 drives the brush cylinder 31 to rotate and reciprocate at the same time, so that the brush cylinder 31 can repeatedly brush the surface of the steel structure to be welded at different angles and along multiple paths, ensuring that the welding area and its surrounding surface are thoroughly cleaned, providing a good surface condition for the subsequent welding process.

[0062] In summary, by further defining the cleaning component 3, this embodiment enables the brush cylinder 31 to achieve a combination of rotation and reciprocating motion using only the traveling motion of the welding device itself without relying on an additional drive source. This makes the cleaning action more uniform, covers a wider range, avoids the generation of cleaning dead corners, and effectively improves the consistency and reliability of the surface treatment before welding.

[0063] Example 3

[0064] Reference Figures 1 to 7 This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a dust removal component 4 and a transmission component 5 for an automatic welding device for a steel structure production line.

[0065] Specifically, the dust collection box 41 has an air chamber 45 inside, and the plug plate 46 is located inside the air chamber 45 and slides laterally against each other. During the reciprocating motion, the plug plate 46 can change the internal volume of the air chamber 45, thereby generating air pressure changes. The top surface of the cover 21 has an exhaust port 44 that communicates with the air chamber 45. The dust suction port 42 is connected to the air chamber 45. Both the dust suction port 42 and the exhaust port 44 are equipped with a one-way valve 43. The installation direction of the one-way valve 43 is used to limit the gas flow direction.

[0066] A drive frame 47 is provided on the outer side of the dust collection box 41. One end of the drive frame 47 is movably inserted through the air cavity 45 and connected to the outer wall of the plug plate 46. A crossbar 54 is provided on the other end of the drive frame 47.

[0067] A connecting frame 52 is provided on the outer circumferential surface of the eccentric disk 51. A mounting hole 53 is longitudinally opened on the outer wall of the end of the connecting frame 52. The end of the crossbar 54 is located inside the mounting hole 53 and is slidably connected up and down. The eccentric rotation of the eccentric disk 51 can push and pull the crossbar 54 obliquely through the connecting frame 52. The up and down sliding of the crossbar 54 in the mounting hole 53 is used to decompose the longitudinal component of the oblique force, while the lateral component of the oblique force is transmitted to the drive frame 47 through the crossbar 54, thereby driving the plug plate 46 to move back and forth in the air chamber 45.

[0068] In vacuuming mode, the installation direction of the one-way valve 43 causes the plug plate 46 to close the suction port 42 and open the exhaust port 44 during the pushing process. The air inside the air chamber 45 is discharged through the exhaust port 44 under compression. During the retraction of the plug plate 46, the one-way valve 43 at the exhaust port 44 closes while the one-way valve 43 at the suction port 42 opens, creating a negative pressure inside the air chamber 45 and sucking up the dust that has been swept through the suction port 42.

[0069] In dust blowing mode, the installation direction of the one-way valve 43 is adjusted so that the plug plate 46 closes the exhaust port 44 and opens the suction port 42 during the pushing process. The air inside the air chamber 45 is released through the suction port 42 under compression to blow away the dust that has been swept. During the pull-back process of the plug plate 46, the one-way valve 43 at the suction port 42 closes while the one-way valve 43 at the exhaust port 44 opens to prevent air from being sucked in through the suction port 42 during the pull-back process.

[0070] The rest of the structure is the same as in Example 2.

[0071] During use, as the welding device moves along the steel structure to be welded with the gantry frame 11, the cleaning component 3 completes the brushing action on the surface of the welding area. During the rotation of the shaft 32, the eccentric disk 51 is driven to rotate synchronously through the sleeve hole 55. The eccentric structure of the eccentric disk 51 causes the connecting frame 52 to generate periodic reciprocating motion. The connecting frame 52 forms an oblique push and pull on the crossbar 54 through the mounting hole 53. The crossbar 54 slides up and down in the mounting hole 53 to decompose the oblique force and transmit the lateral component of the force to the drive frame 47, thereby pushing the plug plate 46 to move back and forth in the air chamber 45, thereby realizing the suction treatment or directional blowing of the dust under cleaning. The whole process is carried out synchronously with the welding and cleaning actions.

[0072] In summary, this embodiment optimizes the dust collection component 4 and the transmission component 5, enabling the device to switch between dust collection mode and dust blowing mode without additional power. This enhances the device's adaptability to different welding conditions. The dust collection component 4 and the cleaning component 3 operate synchronously under the protection of the cover 21, effectively reducing the impact of external interference on the cleaning and dust handling process, thereby ensuring that the welding area maintains a relatively stable clean state throughout the welding process.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An automatic welding device for a steel structure production line, characterized in that, include: Welding assembly (1), including welding head (14); and, The protective assembly (2) includes a cover (21) disposed at the front end of the welding head (14), scrapers (23) disposed at the bottom of the front and rear ends of the cover (21), and rollers (24) disposed on both sides of the cover (21); and, The cleaning assembly (3) includes a guide cylinder (33) disposed on the inner wall of the housing (21), a shaft (32) disposed inside the guide cylinder (33), and a brush cylinder (31) disposed at the other end of the shaft (32); and, The dust removal assembly (4) includes a dust collection box (41) disposed at the top of the housing (21), a stopper plate (46) disposed inside the dust collection box (41), and a suction port (42) opened on the bottom surface of the dust collection box (41); and, The transmission assembly (5) includes an eccentric disc (51) disposed at the end of the guide cylinder (33); wherein, The rotation of the cover (21) drives the brush cylinder (31) to rotate while simultaneously reciprocating linearly via the shaft (32), and the shaft (32) drives the plug plate (46) to reciprocate linearly via the eccentric disk (51).

2. The automatic welding device for steel structure production line as described in claim 1, characterized in that: The welding assembly (1) also includes a gantry (11), a traveling frame (12) disposed at the bottom of both sides of the gantry (11), and a lifting frame (13) disposed at the top of both sides of the gantry (11). The welding head (14) is disposed at the end of the lifting frame (13).

3. The automatic welding device for steel structure production lines as described in claim 2, characterized in that: The rollers (24) are rotatably mounted on the outer walls of both sides of the cover (21), and a spring telescopic rod (22) is provided between the top surface of the scraper (23) and the bottom surface of the cover (21).

4. The automatic welding device for steel structure production line as described in claim 3, characterized in that: The roller (24) has a pin (34) on its end face and a square groove (35) on its end face. The ends of the pins (34) are located inside the square groove (35) and are axially slidably connected to each other.

5. The automatic welding device for steel structure production line as described in claim 4, characterized in that: The inner wall of the guide cylinder (33) is provided with a positioning slider (37), and the outer wall of the end of the shaft (32) is provided with a limiting groove (36). The limiting groove (36) is located inside the positioning slider (37) and slides and fits against each other.

6. The automatic welding device for steel structure production line as described in claim 5, characterized in that: The positioning slider (37) consists of two semi-circular grooves and two oblique arc grooves. The two semi-circular grooves are respectively located at the upper and lower ends of the guide cylinder (33) and distributed on both sides of the guide cylinder (33). The two oblique arc grooves are respectively connected between the ends of the two semi-circular grooves.

7. The automatic welding device for steel structure production line as described in claim 6, characterized in that: The eccentric disk (51) has a sleeve hole (55) through which the shaft (32) passes. The shaft (32) and the sleeve hole (55) are axially slidably connected, and the shaft (32) and the sleeve hole (55) are engaged with each other in the circumferential direction.

8. The automatic welding device for steel structure production line as described in claim 7, characterized in that: The dust collection box (41) has an air chamber (45) inside. The plug plate (46) is located inside the air chamber (45) and slides horizontally against each other. The top surface of the cover (21) has an exhaust port (44) that communicates with the air chamber (45). The dust suction port (42) is connected to the air chamber (45). Both the dust suction port (42) and the exhaust port (44) are equipped with a one-way valve (43).

9. The automatic welding device for a steel structure production line as described in claim 8, characterized in that: A drive frame (47) is provided on the outside of the side of the dust collection box (41). One end of the drive frame (47) is movably penetrated through the air cavity (45) and connected to the outer wall of the plug plate (46). A crossbar (54) is provided on the other end of the drive frame (47).

10. The automatic welding device for a steel structure production line as described in claim 9, characterized in that: The outer circumferential surface of the eccentric disk (51) is provided with a connecting frame (52), and the outer wall of the end of the connecting frame (52) is longitudinally provided with a mounting hole (53). The end of the crossbar (54) is located inside the mounting hole (53) and is slidably connected up and down.

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