Arc welding machine for building steel structure machining

Abstract

The invention relates to the technical field of arc welding machines, in particular to an arc welding machine for building steel structure machining, which comprises a machine body, convex bottom plates are slidably mounted at the two ends of the bottom of the machine body, first electric rotating shafts are rotatably mounted at the ends, away from the machine body, of the two sides of each bottom plate, and rotating wheels are mounted on the outer walls of the first electric rotating shafts; a plurality of mounting grooves are formed in the outer wall of the rotating wheel, electromagnet blocks are mounted on the inner walls of the mounting grooves, a laser gradienter is mounted at the bottom of the bottom plate in the length direction, a through hole is formed in the inner bottom of the machine body, a limiting block is slidably mounted in the through hole, the bottom end of the limiting block is located below the machine body, and a welding head is mounted at the bottom end of the limiting block. When in use, the steel structure automatic welding device can translate and vertically move at a higher position of a steel structure, and can perform multi-position automatic welding at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of arc welding machines, and in particular to an arc welding machine for processing building steel structures. Background Art

[0002] Steel structure is a structure made of steel materials and is one of the main types of building structures. The structure is mainly composed of steel beams, steel columns, steel trusses and other components made of steel sections and steel plates, and adopts rust removal and rust prevention processes such as silanization, pure manganese phosphating, water washing and drying, and galvanizing. The components or parts are usually connected by welds, bolts or rivets. Because of its light weight and simple construction, it is widely used in large factories, venues, super high-rise buildings, bridges and other fields. In order to improve the stability of steel structures during use, most of them will use welding equipment to weld the connection positions of two adjacent steel structures.

[0003] Most of the existing building steel structures are large steel structures similar to factory buildings. When welding at higher positions of the steel structure, the workers have to stand on ladders to weld the steel structure. When welding at multiple higher positions, the ladders need to be moved frequently, and there are great safety hazards during welding. At the same time, the toxic gases and strong light generated during welding can cause harm to the workers, and common welding equipment cannot climb and move on the surface of the steel structure and perform automatic welding. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings in the prior art and to propose an arc welding machine for processing building steel structures.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: An arc welding machine for processing building steel structures includes a machine body, wherein convex bottom plates are slidably installed at both ends of the bottom of the machine body, first electric rotating shafts are rotatably installed at one end of both sides of the bottom plate away from the machine body, a rotating wheel is installed on the outer wall of the first electric rotating shaft, a plurality of mounting grooves are provided on the outer wall of the rotating wheel, an electromagnet block is installed on the inner wall of the mounting groove, a laser level is installed on the bottom of the bottom plate in the length direction, a through hole is provided on the inner bottom of the machine body, a limit block is slidably installed inside the through hole, the bottom end of the limit block is located below the machine body, and a welding head is installed on the bottom end of the limit block.

[0006] Preferably, a rotating shaft is rotatably installed on the inner walls at both ends of the body, and a unwinding wheel is installed on the outer wall of the rotating shaft. The two unwinding wheels are respectively located on both sides above the limit block, and connecting blocks are installed on the inner walls on both sides of the body near the unwinding wheels. A connecting groove is provided on the top of the connecting block, and a circuit board is installed inside the body at the top of the connecting block.

[0007] Preferably, the bottom of the circuit board is respectively in contact with the tops of the four connection blocks near the corners, and connecting rods are installed at the bottom of the circuit board near the corners, and the bottom ends of the connecting rods are located inside the connecting grooves.

[0008] Preferably, screw holes are opened on both sides of the through hole at the inner bottom of the body, fixing plates are installed on both sides of the limit block, fixing bolts are installed on the top of the fixing plates, the bottom ends of the fixing bolts pass through the fixing plates and are threadedly installed in the screw holes.

[0009] Preferably, a feeding hole is provided at the top of the limit block, guide grooves are provided on the inner walls on both sides of the top of the feeding hole, placement grooves are provided on the inner walls on both sides of the feeding hole below the guide grooves, and a second electric rotating shaft is rotatably installed on the inner wall of the placement groove.

[0010] Preferably, first conveying wheels are mounted on the outer wall of the second electric rotating shaft, and the outer walls of the two first conveying wheels on one side close to the opposite surface are located inside the feeding hole.

[0011] Preferably, a third electric shaft is rotatably mounted on the inner walls on both sides of the bottom end of the feed hole, a second conveying wheel is mounted on the outer wall of the third electric shaft, the second conveying wheel is located below the first conveying wheel, and the welding head is located below the second conveying wheel.

[0012] Preferably, guide grooves are provided at both ends of the bottom of the body in the length direction, and limit grooves are provided on the inner walls on both sides of the guide grooves at the end away from the limit block, and the bottom plate is slidably installed inside the guide grooves, and the two sides of the end of the bottom plate away from the body are respectively located inside the two limit grooves at the same end.

[0013] Preferably, a slide groove is opened on the inner wall of the guide groove in the length direction, an electric slider is slidably installed inside the slide groove, the bottom end of the electric slider is installed on the top of the bottom plate, a top cover is rotatably installed on the top of the inner wall of the body, a card slot is opened on the side of the top of the body away from the top cover, and a card block is installed on the side of the top cover close to the card slot.

[0014] Preferably, the body has fixing grooves on both sides of the top, one end of the fixing groove passes through the body, a groove is provided at the inner bottom of the fixing groove, and a push switch is installed on the inner wall of the groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects: When the staff of the present invention needs to weld a large-scale building steel structure, the staff first installs and places the building steel structure to be welded, and clamps and fixes the steel structure. When the staff needs to weld at a higher position of the steel structure, the four rotating wheels are adsorbed on the surface of the steel structure by an electromagnet block. When in use, the wheels can be translated and moved vertically at a higher position of the steel structure, and multi-position automatic welding can be performed simultaneously. The staff does not need to climb to a specified height of the steel structure for manual welding, and the welding safety performance is better. At the same time, the harm to the staff caused by toxic gases and strong light generated during welding can be ignored.

[0016] The present invention further provides that when a worker moves at a vertical angle to the inner wall of the L-shaped steel structure, the electric slider pushes the bottom plate and the rotating wheels to move away from the machine body, so that when the machine body moves toward the inner wall of one vertical side of the L-shaped steel structure, the rotating wheels abut against the vertical inner wall of the steel structure. The circuit board adjusts the magnetic field strength of the electromagnet blocks on the two rotating wheels abutting against the inner wall of one vertical side of the steel structure. The rotating wheels rotate on the inner wall of the vertical side of the steel structure, and the magnetic field strength of the electromagnet blocks at different positions is adjusted in real time according to the abutment position of the rotating wheels with the inner wall of the vertical side of the steel structure when the rotating wheels rotate, until the two rotating wheels located in the front of the machine body are completely located on the inner wall of the vertical side of the steel structure, and at the same time, the rear end position of the machine body and the rotating wheels are pulled to move toward the inner wall of the vertical side of the steel structure until the machine body and the four rotating wheels are completely moved to the inner wall of the vertical side of the L-shaped steel structure.

[0017] The light beams irradiated by the two laser levels in the present invention overlap each other near the position of the limit block. When in use, the staff can accurately align the position to be welded on the surface of the steel structure and the position of the welding head through the light beam irradiated by the laser level, which is convenient for the welding head to weld the position to be welded on the steel structure. The first conveying wheel and the second conveying wheel can both clamp the welding wire, and the first conveying wheel is installed horizontally, while the second conveying wheel is installed longitudinally. When in use, the two first conveying wheels and the two second conveying wheels cooperate with each other, which can not only clamp and limit the welding wire, but also convey and straighten the welding wire, which is convenient for the welding wire to accurately weld the steel structure.

[0018] In the present invention, the four connecting blocks are electrically connected to the several electromagnet blocks on the four rotating wheels respectively, and the circuit board can adjust the magnetic fields of the several electromagnet blocks on the four rotating wheels through the connecting blocks. The laser irradiated by the laser level overlaps with the welding gap, and the machine body slowly moves along the welding gap on the surface of the steel structure. The first conveying wheel and the second conveying wheel pull the welding wire downward when rotating. At the same time, the first conveying wheel and the second conveying wheel can straighten the steel wire wound on the unwinding wheel, so that the bottom end of the welding wire can be accurately connected with the position to be welded on the surface of the steel structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of an arc welding machine for processing building steel structures proposed by the present invention; Figure 2 A cross-sectional view of an arc welding machine for processing building steel structures proposed by the present invention; Figure 3 This is a schematic diagram of the bottom structure of an arc welding machine for building steel structure processing proposed by the present invention; Figure 4 This is a schematic diagram of the installation structure of an electromagnet block of an arc welding machine for building steel structure processing proposed by the present invention; Figure 5 This is a schematic diagram of the installation structure of a laser level for an arc welding machine for building steel structure processing proposed by the present invention; Figure 6 This is a schematic diagram of the partial structure of an arc welding machine for building steel structure processing proposed by the present invention; Figure 7 A cross-sectional view of a limit block of an arc welding machine for processing building steel structures proposed by the present invention; Figure 8 The present invention is a schematic diagram of the connecting rod installation structure of an arc welding machine for processing building steel structures.

[0020] In the figure: 1. body; 2. fixing groove; 3. bottom plate; 4. top cover; 5. first electric rotating shaft; 6. rotating wheel; 7. groove; 8. push switch; 9. slot; 10. block; 11. laser level; 12. limit block; 13. circuit board; 14. connecting block; 15. guide groove; 16. limit groove; 17. welding head; 18. electric slider; 19. installation groove; 20. electromagnet block; 21. through hole; 22. screw hole; 23. slide groove; 24. fixing plate; 25. fixing bolt; 26. guide groove; 27. feeding hole; 28. placement groove; 29. ​​second electric rotating shaft; 30. first conveying wheel; 31. third electric rotating shaft; 32. second conveying wheel; 33. connecting groove; 34. connecting rod; 35. rotating shaft; 36. unwinding wheel. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] Reference Figure 1-8 An arc welding machine for processing building steel structures includes a body 1, convex bottom plates 3 are slidably installed at both ends of the bottom of the body 1, first electric shafts 5 are rotatably installed at one end of the bottom plate 3 away from the body 1 on both sides, a rotating wheel 6 is installed on the outer wall of the first electric shaft 5, a plurality of mounting grooves 19 are opened on the outer wall of the rotating wheel 6, an electromagnet block 20 is installed on the inner wall of the mounting groove 19, a laser level 11 is installed at the bottom of the bottom plate 3 along the length direction, a through hole 21 is opened at the inner bottom of the body 1, a limit block 12 is slidably installed inside the through hole 21, the bottom end of the limit block 12 is located below the body 1, and a welding head 17 is installed at the bottom end of the limit block 12.

[0024] As a technical optimization scheme of the present invention, a rotating shaft 35 is rotatably installed on the inner walls at both ends of the body 1, and a reel 36 is installed on the outer wall of the rotating shaft 35. The two reel 36 are respectively located on both sides above the limit block 12. Connecting blocks 14 are installed on the inner walls on both sides of the body 1 near the reel 36. A connecting groove 33 is opened on the top of the connecting block 14. A circuit board 13 is installed on the top of the connecting block 14 inside the body 1. When in use, the staff can wind the welding wire and install it on the reel 36, and at the same time, one end of the welding wire is connected to the limit block 12 and the welding head 17.

[0025] As a technical optimization scheme of the present invention, the bottom of the circuit board 13 near the corners is respectively abutted against the tops of the four connecting blocks 14, and the bottom of the circuit board 13 near the corners is installed with connecting rods 34, and the bottom ends of the connecting rods 34 are located inside the connecting grooves 33; when in use, the four connecting blocks 14 are respectively electrically connected to the electromagnet blocks 20 on the four rotating wheels 6, and the circuit board 13 can energize the electromagnet blocks 20 on the rotating wheels 6 and adjust the magnetic field of the electromagnet blocks 20 through the connecting blocks 14.

[0026] As a technical optimization solution of the present invention, screw holes 22 are provided on both sides of the through hole 21 at the inner bottom of the body 1, fixing plates 24 are installed on both sides of the limit block 12, and fixing bolts 25 are installed on the top of the fixing plate 24. The bottom end of the fixing bolt 25 passes through the fixing plate 24 and is threadedly installed in the screw hole 22; when in use, the staff can install and fix the limit block 12 through the fixing bolts 25.

[0027] As a technical optimization scheme of the present invention, a feed hole 27 is opened at the top of the limit block 12, and guide grooves 26 are opened on the inner walls on both sides of the top of the feed hole 27, and placement grooves 28 are opened on the inner walls on both sides of the feed hole 27 below the guide grooves 26, and a second electric rotating shaft 29 is rotatably installed on the inner wall of the placement groove 28; when in use, one end of the welding wire passes through the feed hole 27 and the welding head 17 to the surface of the steel structure, and the connection position of the two adjacent steel structures is welded.

[0028] As a technical optimization solution of the present invention, a first conveying wheel 30 is installed on the outer wall of the second electric rotating shaft 29, and the outer wall of the two first conveying wheels 30 close to the opposite side is located inside the feeding hole 27; when in use, the welding wire is located between the two first conveying wheels 30, and the two first conveying wheels 30 clamp the welding wire, and when the first conveying wheels 30 rotate, the welding wire can be pulled and conveyed downward.

[0029] As a technical optimization solution of the present invention, a third electric rotating shaft 31 is rotatably installed on the inner walls on both sides of the bottom end of the feeding hole 27, and a second conveying wheel 32 is installed on the outer wall of the third electric rotating shaft 31. The second conveying wheel 32 is located below the first conveying wheel 30, and the welding head 17 is located below the second conveying wheel 32. When in use, the second conveying wheel 32 and the first conveying wheel 30 cooperate with each other, which can not only clamp and convey the welding wire, but also straighten the bent welding wire, so as to facilitate the welding wire to weld the connection position of the steel structure.

[0030] As a technical optimization solution of the present invention, guide grooves 15 are provided at both ends of the bottom of the body 1 in the length direction, and limit grooves 16 are provided on the inner walls on both sides of the guide grooves 15 at the end away from the limit block 12. The bottom plate 3 is slidably installed inside the guide grooves 15, and the two sides of the end of the bottom plate 3 away from the body 1 are respectively located inside the two limit grooves 16 at the same end; when in use, the staff can drive the bottom plate 3 and the rotating wheel 6 to move through the electric slider 18 according to the usage situation.

[0031] As a technical optimization scheme of the present invention, a slide groove 23 is opened on the inner wall of the guide groove 15 in the length direction, and an electric slider 18 is slidably installed inside the slide groove 23. The bottom end of the electric slider 18 is installed on the top of the bottom plate 3. A top cover 4 is rotatably installed on the top of the inner wall of the body 1. A card slot 9 is opened on the side of the top of the body 1 away from the top cover 4, and a card block 10 is installed on the side of the top cover 4 close to the card slot 9; when the body 1 moves at a right angle to the inner wall of the vertical L-shaped steel structure, the staff can move the two bottom plates 3 to a position away from the body 1 to prevent one end of the body 1 from colliding with the steel structure, so that one end edge of the rotating wheel 6 abuts against the inner wall of the L-shaped steel structure, and the body 1 is moved vertically upward on the side of the steel structure through the adsorption force of the electromagnet block 20 and the steel structure.

[0032] As a technical optimization solution of the present invention, fixed grooves 2 are provided on both sides of the top of the body 1, one end of the fixed groove 2 passes through the body 1, a groove 7 is provided at the inner bottom of the fixed groove 2, and a push switch 8 is installed on the inner wall of the groove 7; when in use, the staff can energize and disconnect the electromagnet blocks 20 on the four rotating wheels 6 by pressing the switch 8.

[0033] When the present invention is used, when the staff needs to weld a large building steel structure, the staff first installs and places the building steel structure to be welded, and clamps and fixes the steel structure. The staff turns on the two laser levels 11 on the two bottom plates 3, so that the laser levels 11 emit long linear green laser light. When in use, the light emitted by the two laser levels 11 overlaps each other near the position of the limit block 12. When in use, the staff can accurately align the position to be welded on the surface of the steel structure and the position of the welding head 17 through the light emitted by the laser level 11, so that the welding head 17 can weld the position to be welded on the steel structure.

[0034] The staff places the limit block 12 inside the body 1 through the top of the body 1, and the bottom end of the limit block 12 passes through the through hole 21, and the fixing plates 24 on both sides of the limit block 12 are abutted against the inner bottom of the body 1, and the staff fixes the fixing plates 24 to the inner bottom of the body 1 through the fixing bolts 25. When in use, the fixing bolts 25 can fix the position of the limit block 12 and the welding head 17 through the fixing plate 24, and the through hole 21 can limit the middle end of the limit block 12, so that the welding head 17 can accurately weld the steel structure when in use, and prevent the welding head 17 from shaking when in use.

[0035] The staff winds the welding wire or flexible welding rope to be used on the two unwinding wheels 36. When in use, the staff can choose to use flexible welding materials such as welding wire and welding rope according to the welding accuracy of the building steel structure. The staff passes one end of the welding wire through the feeding hole 27 and the welding head 17, and the welding wire is located between the two first conveying wheels 30 and between the two second conveying wheels 32. When in use, the first conveying wheel 30 and the second conveying wheel 32 can both clamp the welding wire, and the first conveying wheel 30 is installed horizontally, while the second conveying wheel 32 is installed longitudinally. When in use, the two first conveying wheels 30 and the two second conveying wheels 32 cooperate with each other, which can not only clamp and limit the welding wire, but also convey and straighten the welding wire, so as to facilitate the welding wire to accurately weld the steel structure.

[0036] The staff installs the circuit board 13 inside the body 1, and the four connecting blocks 14 located on the inner wall of the body 1 respectively support the four corners of the circuit board 13, and the four connecting rods 34 at the bottom of the circuit board 13 are respectively inserted into the connecting grooves 33 on the top of the connecting blocks 14, and the four connecting blocks 14 are respectively electrically connected to the several electromagnet blocks 20 on the four rotating wheels 6, and the circuit board 13 can adjust the magnetic fields of the several electromagnet blocks 20 on the four rotating wheels 6 through the connecting blocks 14. At the same time, the circuit board 13 is connected to the power supply through the press switch 8. The staff can connect or disconnect the current between the circuit board 13 and the electromagnet block 20 by pressing the switch 8, which is convenient for the staff to move the body 1 vertically at different angles on the steel structure surface through the electromagnet block 20.

[0037] The staff rotates the top cover 4 so that the block 10 on one side of the top cover 4 is stuck in the slot 9 on the body 1, so that the top cover 4 seals the top of the body 1, and at the same time protects the circuit board 13 and welding wire inside the body 1 to prevent sparks and dust generated when moving and welding on the steel structure surface from falling into the body 1. The staff takes the body 1, and the staff presses the press switches 8 on both sides of the body 1 with their fingers, so that the external power supply or the battery installed inside it and the circuit board 13 are mutually energized, and the circuit board 13 is energized through the connecting block 14 and the several electromagnet blocks 20 on the four rotating wheels 6, so that the several electromagnet blocks 20 themselves generate a magnetic field, and the staff places the body 1 on the surface of the fixed steel structure, and adjusts the position of the body 1 through the position of the light irradiated on the steel structure surface by the laser level 11, and the several electromagnet blocks 20 on the four rotating wheels 6 can be adsorbed on the surface of the steel structure.

[0038] When the staff needs to weld at a higher position of the steel structure, the staff can drive the rotating wheel 6 to rotate on the surface of the steel structure through the first electric shaft 5, and drive the body 1 to move on the surface of the steel structure. When in use, the four rotating wheels 6 are adsorbed on the surface of the steel structure by the electromagnet block 20. When in use, the body 1 can move on the top of the steel structure and can also move vertically on the side of the steel structure. When the body 1 moves, the circuit board 13 can adjust the magnetic field strength of several electromagnet blocks 20 on the rotating wheel 6 when it rotates, so that the body 1 and the four rotating wheels 6 can move better on the side of the steel structure, and the laser level 11 will shine on the surface of the steel structure when the body 1 moves, and the light of the laser level 11 shining on the surface of the steel structure in front of the body 1 is the moving direction of the body 1 until the body 1 moves to the position on the surface of the steel structure to be welded.

[0039] When the machine body 1 moves to the position on the surface of the steel structure to be welded, the laser irradiated by the laser level 11 overlaps with the welding gap, and the machine body 1 slowly moves along the welding gap on the surface of the steel structure. At the same time, the second electric shaft 29 and the third electric shaft 31 respectively drive the first conveying wheel 30 and the second conveying wheel 32 to rotate, and the first conveying wheel 30 and the second conveying wheel 32 can pull the welding wire downward when rotating. At the same time, the first conveying wheel 30 and the second conveying wheel 32 can straighten the steel wire wound on the unwinding wheel 36, so that the bottom end of the welding wire can be accurately connected with the position on the surface of the steel structure to be welded.

[0040] The bottom end of the welding wire moves toward the surface of the steel structure through the welding head 17 until the bottom end of the welding wire abuts against the welding gap, and the welding wire is melted by the high temperature of the arc and solidified at the welding gap position on the surface of the steel structure, thereby achieving the effect of welding the steel structure. When the welding head 17 welds the steel structure through the welding wire, the rotating wheel 6 and the machine body 1 slowly move on the surface of the steel structure to perform mobile welding on the surface of the steel structure, and the movement of the machine body 1 is more stable during use, so that the welding of the welding gap on the surface of the steel structure is more uniform and the welding effect is better. At the same time, because the machine body 1 is automatically welded at a high position on the surface of the steel structure, there is no need for the staff to manually weld the steel structure at close range, which is more convenient to use. At the same time, the toxic gas generated during welding can also prevent harm to the staff. At the same time, the staff does not need to wear a welding mask and a filter during welding to prevent the strong light generated during welding from causing harm to the eyes of the staff.

[0041] When the staff moves at a vertical angle to the inner wall of the L-shaped steel structure, the staff can use the electric slider 18 to push the bottom plate 3 and the rotating wheel 6 to move away from the body 1, so that when the body 1 moves toward the inner wall of the vertical side of the L-shaped steel structure, the rotating wheel 6 abuts against the vertical inner wall of the steel structure, and the circuit board 13 adjusts the magnetic field strength of the electromagnet blocks 20 on the two rotating wheels 6 abutting against the inner wall of the vertical side of the steel structure, reduces the magnetic field of the electromagnet block 20 abutting against the steel structure below the rotating wheel 6, and increases the magnetic field of the electromagnet block 20 abutting against the steel structure on the side vertical to the steel structure. At the same time, the first electric shaft 5 drives the rotating wheel 6 to rotate on the inner wall of the vertical side of the steel structure, and according to the rotating wheel 6 During rotation, the abutment position with the inner wall of the vertical side of the steel structure adjusts the magnetic field strength of the electromagnet block 20 at different positions in real time until the two rotating wheels 6 located in front of the body 1 are completely located on the inner wall of the vertical side of the steel structure, and at the same time, the rear end position of the body 1 and the rotating wheels 6 are pulled to move toward the inner wall of the vertical side of the steel structure, until the body 1 and the four rotating wheels 6 are completely moved to the inner wall of the vertical side of the L-shaped steel structure, and move vertically on the side of the steel structure. When in use, it can be moved to a higher position of the steel structure and multi-position automatic welding can be performed at the same time. There is no need for workers to climb to the specified height of the steel structure for manual welding, and the welding safety performance is better. At the same time, the harm to workers caused by toxic gases and strong light generated during welding can be ignored.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An arc welding machine for processing building steel structures, comprising a machine body (1), characterized in that: Convex bottom plates (3) are slidably mounted at both ends of the bottom of the body (1), first electric rotating shafts (5) are rotatably mounted at both ends of the bottom plate (3) away from the body (1), a rotating wheel (6) is mounted on the outer wall of the first electric rotating shaft (5), a plurality of mounting grooves (19) are formed on the outer wall of the rotating wheel (6), an electromagnet block (20) is mounted on the inner wall of the mounting groove (19), a laser level (11) is mounted on the bottom of the bottom plate (3) along the length direction, a through hole (21) is formed on the inner bottom of the body (1), a limit block (12) is slidably mounted inside the through hole (21), the bottom end of the limit block (12) is located below the body (1), and a welding head (17) is mounted on the bottom end of the limit block (12).

2. The arc welding machine for building steel structure processing according to claim 1, characterized in that: A rotating shaft (35) is rotatably mounted on the inner walls at both ends of the machine body (1), and an unwinding wheel (36) is mounted on the outer wall of the rotating shaft (35). The two unwinding wheels (36) are respectively located on both sides above the limit block (12). A connecting block (14) is mounted on the inner walls at both sides of the machine body (1) near the unwinding wheels (36), and a connecting groove (33) is formed on the top of the connecting block (14). A circuit board (13) is mounted on the top of the connecting block (14) inside the machine body (1).

3. The arc welding machine for building steel structure processing according to claim 2, characterized in that: The bottom of the circuit board (13) near the corners respectively abuts against the tops of the four connection blocks (14), and the bottom of the circuit board (13) near the corners is provided with a connection rod (34), the bottom end of the connection rod (34) being located inside the connection groove (33).

4. The arc welding machine for building steel structure processing according to claim 1, characterized in that: The inner bottom of the machine body (1) is provided with screw holes (22) on both sides of the through hole (21), fixing plates (24) are installed on both sides of the limit block (12), and fixing bolts (25) are installed on the top of the fixing plate (24), and the bottom end of the fixing bolt (25) passes through the fixing plate (24) and is threadedly installed in the screw hole (22).

5. The arc welding machine for building steel structure processing according to claim 1, characterized in that: A feeding hole (27) is provided at the top of the limit block (12), guide grooves (26) are provided on the inner walls on both sides of the top of the feeding hole (27), placement grooves (28) are provided on the inner walls on both sides of the feeding hole (27) below the guide grooves (26), and a second electric rotating shaft (29) is rotatably mounted on the inner wall of the placement groove (28).

6. The arc welding machine for building steel structure processing according to claim 5, characterized in that: A first conveying wheel (30) is mounted on the outer wall of the second electric rotating shaft (29), and the outer walls of the two first conveying wheels (30) close to the opposite sides are located inside the material conveying hole (27).

7. The arc welding machine for building steel structure processing according to claim 6, characterized in that: A third electric rotating shaft (31) is rotatably mounted on both inner walls of the bottom end of the feeding hole (27), a second conveying wheel (32) is mounted on the outer wall of the third electric rotating shaft (31), the second conveying wheel (32) is located below the first conveying wheel (30), and the welding head (17) is located below the second conveying wheel (32).

8. The arc welding machine for building steel structure processing according to claim 1, characterized in that: Both ends of the bottom of the machine body (1) are provided with guide grooves (15) in the length direction, and both ends of the inner walls of the guide grooves (15) away from the limit block (12) are provided with limit grooves (16), the bottom plate (3) is slidably mounted inside the guide grooves (15), and both sides of the end of the bottom plate (3) away from the machine body (1) are respectively located inside two limit grooves (16) at the same end.

9. The arc welding machine for building steel structure processing according to claim 1, characterized in that: The inner wall of the guide groove (15) is provided with a slide groove (23) in the length direction, an electric slider (18) is slidably mounted inside the slide groove (23), the bottom end of the electric slider (18) is mounted on the top of the bottom plate (3), a top cover (4) is rotatably mounted on the top of the inner wall of the machine body (1), a clamping groove (9) is provided on the side of the top of the machine body (1) away from the top cover (4), and a clamping block (10) is mounted on the side of the top cover (4) close to the clamping groove (9).

10. The arc welding machine for building steel structure processing according to claim 1, characterized in that: The body (1) has fixed grooves (2) on both sides of the top, one end of the fixed groove (2) passes through the body (1), a groove (7) is provided at the inner bottom of the fixed groove (2), and a push switch (8) is installed on the inner wall of the groove (7).

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