A welding device and welding method for processing a building steel structure

Abstract

The application belongs to the technical field of steel structure welding, and particularly relates to a welding device and method for building steel structure processing; the welding device comprises a welding machine body, two racks one and one rack two are arranged on one side of the welding machine body, the two racks one are symmetrically distributed about the rack two, a screw rod one is rotationally connected to the top of each of the two racks one, a moving seat is connected to the screw rod one through a screw nut pair, and a mounting seat is fixedly connected to the moving seat; the rotating seat and the four-jaw clamping mechanism are arranged on the two racks one, the positioning block and the positioning plate are matched, the round steel pipes can be quickly clamped and fixed, the two round steel pipes can be rotated, the relative positions of the two round steel pipes are adjusted, the intersecting cutting surfaces of the two round steel pipes can be accurately matched, and the welding machine body can complete the welding operation, which not only reduces the working strength of the workers, but also greatly improves the working efficiency.

Description

Technical Field

[0001] This invention belongs to the field of steel structure welding technology, specifically a welding device and welding method for processing building steel structures. Background Technology

[0002] In modern steel structure engineering, round steel pipes are widely used in various building structures such as large-span stadiums, convention centers, airport terminals, and tubular trusses due to their advantages of reasonable stress distribution, simple structure, and material saving. They have become one of the core components supporting the overall structural stability. The connection between round steel pipes is mostly done by intersecting welding, that is, by cutting the ends of two round steel pipes to intersect and form matching irregular interfaces, and then welding them to achieve a fixed connection. The welding quality directly determines the load-bearing capacity of the steel structure node, and thus affects the safety, stability and service life of the entire building structure.

[0003] In existing technologies, right-angle intersecting welding of two round steel pipes is a very common form of joint connection. Traditional construction processes usually involve first cutting the intersection line of the two round steel pipes, then manually adjusting the relative position and spatial posture of the two round steel pipes repeatedly to ensure that the intersection cut surfaces are tightly fitted before welding. However, this method has significant drawbacks. On the one hand, before welding, workers need to repeatedly calibrate and adjust the angle and relative position of the two round steel pipes to ensure the fitting accuracy of the intersection surfaces, which is cumbersome and time-consuming. On the other hand, throughout the welding process, workers still need to continuously assist in fixing the round steel pipes to prevent them from shifting. These operations not only increase the labor intensity of on-site workers but also significantly reduce the construction efficiency and assembly accuracy of right-angle intersecting welding of round steel pipes.

[0004] Therefore, the present invention provides a welding device and welding method for processing building steel structures. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies and solve the problems mentioned in the background section, this invention proposes a welding device and welding method for processing building steel structures.

[0006] The technical solution applicable to solving the technical problem of this invention is as follows: A welding device for processing building steel structures, comprising a welding machine body, with two first frames and one second frame arranged on one side of the welding machine body. The two first frames are symmetrically distributed about the second frame. A lead screw is rotatably connected to the top of each of the two first frames. A movable seat is connected to the lead screw through a lead screw and nut pair. A mounting seat is fixedly connected to the movable seat. A rotating seat is rotatably connected to one side of the mounting seat. A four-jaw clamping mechanism is provided on the rotating seat. A pair of guide rods are symmetrically fixed to the top of each of the two frames. The movable seat is slidably connected to the guide rods. A servo motor is fixedly installed on one side of each of the two frames. The output end of the servo motor is fixedly connected to one end of the lead screw. A fixed frame is fixed to the top of the frame. A cylinder is fixedly installed on the top of the fixed frame. A positioning block is fixed to the output end of the cylinder. A bracket is fixed to the top of the positioning block. An arc-shaped support arm is rotatably connected to the bracket. A positioning plate is fixed to the end of the arc-shaped support arm away from the bracket.

[0007] Preferably, a pair of limiting plates are fixedly connected to the end of the positioning block away from the cylinder, the included angle between the pair of limiting plates is 90 degrees, the positioning plate is located on the angle bisector between the two limiting plates, the two lead screws are vertically distributed, and telescopic rods are fixedly connected to both sides of the fixing frame. The end of the telescopic rod away from the fixing frame is fixedly connected to the bottom end of the positioning block, and the sliding trajectory of the positioning block is located on the angle bisector between the two lead screws.

[0008] Preferably, the arc-shaped support arm has a limiting hole, and a pair of L-shaped plates are symmetrically fixed to the bracket. The L-shaped plates have a through hole one and a through hole two. Each through hole one and through hole two is provided with a limiting rod. A spring is fixed between the end of the limiting rod and the L-shaped plate. The limiting rod is adapted to the limiting hole.

[0009] Preferably, the four-jaw clamping mechanism includes a chuck and jaws. The chuck is rotatably connected to the inner cavity of the rotating seat. The chuck is provided with a flat threaded disc and a flat gear disc. Four limiting grooves are opened on the side of the rotating seat away from the mounting seat. Jaws are slidably connected in the limiting grooves. The jaws are adapted to the flat threaded disc on the chuck. A rotating shaft is rotatably connected to the outer wall of the rotating seat. One end of the rotating shaft extends into the rotating seat and is fixedly connected to a bevel gear. The bevel gear meshes with the flat gear disc on the chuck. A second servo motor is fixedly installed on the top of the mounting seat. A spur gear is fixedly connected to the output end of the second servo motor. A gear ring is meshed with the bottom of the spur gear. The gear ring is fixedly connected to the arc-shaped outer wall of the rotating seat.

[0010] Preferably, a fixed sleeve is fixedly connected to the arc-shaped outer wall of the rotating seat. The fixed sleeve has a screw hole, and a hollow screw is threaded into the screw hole. The inner wall of the hollow screw has a plurality of grooves evenly distributed. The outer wall of the rotating shaft has a plurality of protrusions evenly distributed. The protrusions are slidably connected to the grooves. The end of the rotating shaft away from the bevel gear is located in the inner cavity of the fixed sleeve.

[0011] Preferably, two columns are fixedly connected to the second frame, and the two columns are respectively adapted to the two first frames. A base plate is fixedly connected to the side of the column near the first frame. A lifting plate is provided above the base plate. Several supports are evenly fixed to the top of the lifting plate. An adjustment component is provided in the support. A pair of mounting brackets are provided on the support. Rollers are rotatably connected to the mounting brackets. The rollers are inclined. The lifting component is provided on the column.

[0012] Preferably, the lifting assembly includes a second cylinder, which is fixedly installed on the side wall of the column. The output end of the second cylinder is fixedly connected to the lifting plate, and a plurality of support rods are evenly fixedly connected to the bottom end of the lifting plate. The support rods are slidably connected to the base plate.

[0013] Preferably, the adjustment assembly includes a servo motor three and a lead screw two. The servo motor three is fixedly installed on the side of the lifting plate away from the column. The top of the support has symmetrically opened sliding grooves. The mounting bracket is slidably connected to the sliding grooves. The lead screw two is rotatably connected in the inner cavity of the support. A slider is connected to the lead screw two through a lead screw nut pair. The lead screw two has symmetrically opened reverse double threads. The bottom end of the mounting bracket extends into the inner cavity of the support and is fixedly connected to the top of the slider. A pair of guide rods two are symmetrically fixed in the inner cavity of the support. The slider is slidably connected to the guide rods two. One end of the lead screw two extends to the outside of the support and is fixedly connected to a transmission wheel. Several transmission wheels are driven by a transmission belt. The output end of the servo motor three is fixedly connected to one of the lead screws two.

[0014] Preferably, an H-shaped plate is fixedly connected between adjacent supports, and an auxiliary wheel is rotatably connected to the H-shaped plate. The auxiliary wheel and the transmission wheel are driven by a transmission belt.

[0015] A welding method for fabricating building steel structures, applicable to the aforementioned welding apparatus for fabricating building steel structures, includes the following steps: S1: The staff first makes a preliminary adjustment to the intersecting cut surfaces of the two round steel pipes, then rotates the hollow screws on the two rotating seats respectively, causing the cleats to slide relative to each other, completing the preliminary clamping and fixing of the round steel pipes. Then, the cylinder is started to push the positioning block closer to the two round steel pipes until the two limit plates are in contact with the corresponding round steel pipes. Then, the arc-shaped support arm is rotated to make the positioning plate rotate between the two round steel pipes. S2: Start servo motor one, drive the moving seat to move the two round steel pipes as a whole towards the positioning plate. During this process, start servo motor two at the same time, drive the round steel pipes to rotate and adjust at a small angle through the rotating seat until the intersecting cut surface of the round steel pipes is completely in contact with the positioning plate, and complete the precise alignment. S3: After alignment, start cylinder one to move the positioning block and positioning plate away from the round steel pipe, then drive the two round steel pipes to move closer to each other until they fit together through servo motor one, and finally start the welding machine body to perform welding operation on the intersecting cut surfaces of the two round steel pipes.

[0016] The beneficial effects of this invention are as follows: 1. The welding device and welding method for processing building steel structures according to the present invention, by setting a rotating seat and a four-jaw clamping mechanism on two frames, in conjunction with positioning blocks and positioning plates, can not only quickly clamp and fix round steel pipes, but also rotate two round steel pipes to adjust their relative positions so that their intersecting cutting surfaces can be precisely fitted, so that the welding machine body can complete the welding operation. This not only reduces the workload of the workers, but also greatly improves the work efficiency.

[0017] 2. The welding device and welding method for processing building steel structures according to the present invention, through the distribution design of the two limiting plates and the positioning plate and the limitation of the sliding trajectory of the positioning block, ensures that when the cylinder drives the positioning block to slide, the positioning block always slides along the angle bisector of the two lead screws, thereby ensuring that the two limiting plates can simultaneously fit with the two round steel pipes, and thus ensuring that the positioning plate can accurately fit with the intersecting cut surface of the round steel pipe, and assisting the two round steel pipes to quickly adjust their relative positions.

[0018] 3. The welding device and welding method for processing building steel structures according to the present invention uses a servo motor three to drive one of the lead screws two to rotate, so that the other lead screws two rotate accordingly under the transmission cooperation of the transmission wheel and the transmission belt. This causes the two sliders in the support to slide relative to or opposite to each other, which makes it convenient for the operator to adjust the distance between the rollers on the two mounting brackets according to the size of different round steel pipes. The cylinder two drives the lifting plate to rise or fall, so that the support drives the rollers to rise or fall together. This allows the rollers to support round steel pipes of different sizes after the claws clamp the round steel pipes, reducing the clamping load of the claws. At the same time, it can also play an auxiliary guiding role when the round steel pipes move closer to the positioning plate. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the structure of two parts of the frame of the present invention; Figure 3 This is a structural schematic diagram of one part of the frame of the present invention; Figure 4 This is a structural schematic diagram of the fixing frame of the present invention; Figure 5 This is an exploded view of the rotating seat of the present invention; Figure 6 yes Figure 5 Enlarged view of a portion of point A in the middle; Figure 7 This is a cross-sectional view of the fixing sleeve of the present invention; Figure 8 yes Figure 7 Enlarged view of a section at point B in the middle; Figure 9 This is an exploded view of the support structure of the present invention; Figure 10 yes Figure 9 Enlarged view of a section at point C; Figure 11 This is a schematic diagram of the structure of the base plate of the present invention; Figure 12 This is an exploded view of the support of the present invention.

[0021] In the diagram: 1. Welding machine body; 2. Frame 1; 3. Lead screw 1; 4. Guide rod 1; 5. Servo motor 1; 6. Moving seat; 7. Mounting seat; 8. Servo motor 2; 9. Spur gear; 10. Rotating seat; 11. Gear ring; 12. Limiting groove; 13. Chuck; 14. Claw; 15. Fixing sleeve; 16. Screw hole; 17. Hollow screw; 18. Rotating shaft; 19. Protrusion; 20. Bevel gear; 21. Frame 2; 22. Fixing frame; 23. Cylinder 1; 24. Positioning block; 25. Telescopic rod 26. Limiting plate; 27. Bracket; 28. Arc-shaped support arm; 29. ​​Positioning plate; 30. Limiting hole; 31. L-shaped plate; 32. Through hole one; 33. Through hole two; 34. Limiting rod; 35. Spring; 36. Column; 37. Base plate; 38. Cylinder two; 39. Lifting plate; 40. Support rod; 41. Support; 42. Slide groove; 43. Servo motor three; 44. Lead screw two; 45. Guide rod two; 46. Slider; 47. Mounting bracket; 48. Roller; 49. Transmission wheel; 50. Transmission belt. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] like Figures 1-12As shown in the embodiment of the present invention, a welding device for processing building steel structures includes a welding machine body 1. Two machine frames 1 2 and one machine frame 21 are arranged on one side of the welding machine body 1. The two machine frames 1 2 are symmetrically distributed about the machine frame 21. A lead screw 3 is rotatably connected to the top of each of the two machine frames 1 2. A movable seat 6 is connected to the lead screw 1 3 via a lead screw and nut pair. A mounting seat 7 is fixedly connected to the movable seat 6. A rotating seat 10 is rotatably connected to one side of the mounting seat 7. The rotating seat 10 is equipped with a four-jaw clamping mechanism. The tops of the two machine frames 1 2 are symmetrically fixed... A pair of guide rods 4 are connected, and the movable seat 6 is slidably connected to the guide rods 4. A servo motor 5 is fixedly installed on one side of each of the two frames 2. The output end of the servo motor 5 is fixedly connected to one end of the lead screw 3. A fixed frame 22 is fixedly connected to the top of the frame 21. A cylinder 23 is fixedly installed on the top of the fixed frame 22. A positioning block 24 is fixedly connected to the output end of the cylinder 23. A bracket 27 is fixedly connected to the top of the positioning block 24. An arc-shaped support arm 28 is rotatably connected to the bracket 27. A positioning plate 29 is fixedly connected to the end of the arc-shaped support arm 28 away from the bracket 27. This application takes into account that, in the current field of steel structure engineering, the right-angle intersecting welding of two round steel pipes is a very common form of node connection. Traditional construction methods typically involve first cutting the intersection line of the two round steel pipes, then manually and repeatedly adjusting their relative positions and spatial orientations to ensure a tight fit between the intersecting cut surfaces before welding. However, this method has significant drawbacks. On the one hand, before welding, workers need to repeatedly calibrate and adjust the angles and relative positions of the two round steel pipes to ensure the accuracy of the intersecting surface fit, which is cumbersome and time-consuming. On the other hand, throughout the entire welding process, workers still need to continuously... The auxiliary fixing of the round steel pipe to prevent it from shifting not only increases the labor intensity of the on-site workers, but also significantly reduces the construction efficiency and assembly accuracy of the right-angle intersecting welding of the round steel pipe. To address this, this application sets a rotating seat 10 and a four-jaw clamping mechanism on two frames 1-2, in conjunction with a positioning block 24 and a positioning plate 29. This not only allows for the quick clamping and fixing of the round steel pipe, but also enables the rotation of the two round steel pipes to adjust their relative positions, so that their intersecting cutting surfaces can be precisely fitted, facilitating the welding machine body 1 to complete the welding operation. This not only reduces the labor intensity of the workers, but also greatly improves work efficiency. During operation, the operator first clamps and fixes the two round steel pipes using the four-jaw clamping mechanisms on the two rotating seats 10. During this process, the intersecting cut surfaces of the two round steel pipes can be roughly adjusted to facilitate subsequent mechanical adjustments. Then, cylinder 23 is activated, causing the positioning block 24 to move towards the two round steel pipes until the positioning block 24 is in contact with both round steel pipes. At this point, the arc-shaped support arm 28 is rotated, causing the positioning plate 29 to rotate between the two round steel pipes. Afterward, the operator activates servo motor 5, causing the lead screw 3 to rotate and drive the entire moving seat 6. The rotating seat 10 moves towards the positioning plate 29. During this process, the rotating seat 10 rotates and drives the four-jaw clamping mechanism and the round steel pipe to rotate at a small angle until the intersecting cut surface of the round steel pipe can fit with the surface of the positioning plate 29. The rotating seat 10 is locked. The cylinder 23 drives the positioning block 24 away from the two round steel pipes and completes the reset action. At the same time, the two servo motors 5 are controlled to indirectly drive the two round steel pipes to move closer to each other until the intersecting cut surfaces of the two round steel pipes fit together. Finally, the welding machine body 1 completes the welding operation on the intersecting cut surfaces of the two round steel pipes.

[0024] The positioning block 24 is fixedly connected to a pair of limiting plates 26 at the end away from the cylinder 23. The included angle between the pair of limiting plates 26 is 90 degrees. The positioning plate 29 is located on the angle bisector between the two limiting plates 26. The two lead screws 3 are vertically distributed. Telescopic rods 25 are fixedly connected to both sides of the fixing frame 22. The end of the telescopic rod 25 away from the fixing frame 22 is fixedly connected to the bottom end of the positioning block 24. The sliding trajectory of the positioning block 24 is located on the angle bisector between the two lead screws 3. It should be noted that the vertical distribution design of the two lead screws 3 allows the two round steel pipes to slide along the lead screws 3 after being fixed by the four-jaw clamping mechanism, ensuring that the included angle between the two round steel pipes is 90 degrees. Through the distribution design of the two limiting plates 26 and the positioning plate 29, as well as the limitation of the sliding trajectory of the positioning block 24, when the cylinder 23 drives the positioning block 24 to slide, the positioning block 24 always slides along the angle bisector of the two lead screws 3, ensuring that the two limiting plates 26 can simultaneously fit the two round steel pipes, thereby ensuring that the positioning plate 29 can accurately fit with the intersecting cut surface of the round steel pipes, assisting the two round steel pipes to quickly adjust their relative positions.

[0025] The arc-shaped support arm 28 has a limiting hole 30. A pair of L-shaped plates 31 are symmetrically fixed to the bracket 27. The L-shaped plates 31 have a through hole 32 and a through hole 33. A limiting rod 34 is provided in both the through hole 32 and the through hole 33. A spring 35 is fixed between the end of the limiting rod 34 and the L-shaped plate 31. The limiting rod 34 is adapted to the limiting hole 30. During operation, before the positioning block 24 approaches the two round steel pipes, the positioning plate 29 is in contact with the two limiting plates 26. At this time, the limiting rod 34 in the first through hole 32 passes through the limiting hole 30 on the arc-shaped support arm 28, locking the arc-shaped support arm 28. When the positioning plate 29 completes the calibration work and before the positioning block 24 is ready to move away from the two round steel pipes, the operator slides the limiting rod 34 in the first through hole 32 and the second through hole 33 outward, causing the spring 35 to be stretched. After the limiting rod 34 in the first through hole 32 disengages from the limiting hole 30 on the arc-shaped support arm 28, the operation... The operator can rotate the arc-shaped support arm 28 so that the limiting hole 30 is aligned with the second through hole 33. At this time, the two limiting rods 34 are released. Under the tension of the spring 35, the two limiting rods 34 are reset, and the limiting rod 34 in the second through hole 33 passes through the limiting hole 30 on the arc-shaped support arm 28, thereby locking the arc-shaped support arm 28 and the positioning plate 29. Through this structure, the positioning plate 29 can be unfolded and fitted with the two limiting plates 26 when calibration work is required, and can be rotated and stored after calibration work is completed, so as to avoid affecting the subsequent welding operation of the welding machine body 1.

[0026] The four-jaw clamping mechanism includes a chuck 13 and jaws 14. The chuck 13 is rotatably connected to the inner cavity of the rotating seat 10. The chuck 13 is provided with a flat threaded disc and a flat gear disc. Four limiting grooves 12 are opened on the side of the rotating seat 10 away from the mounting seat 7. The jaws 14 are slidably connected in the limiting grooves 12. The jaws 14 are adapted to the flat threaded disc on the chuck 13. A rotating shaft 18 is rotatably connected to the outer wall of the rotating seat 10. One end of the rotating shaft 18 extends into the rotating seat 10 and is fixedly connected to a bevel gear 20. The bevel gear 20 is meshed with the flat gear disc on the chuck 13. A servo motor 2 8 is fixedly installed on the top of the mounting seat 7. A spur gear 9 is fixedly connected to the output end of the servo motor 2 8. A gear ring 11 is meshed with the bottom of the spur gear 9. The gear ring 11 is fixedly connected to the arc-shaped outer wall of the rotating seat 10. During operation, the rotating shaft 18 drives the bevel gear 20 to rotate, causing the chuck 13 to rotate and the four jaws 14 to slide along the limiting groove 12 on the rotating seat 10, facilitating the clamping and fixing of round steel pipes of different sizes. When the moving seat 6 slides towards the positioning plate 29 under the drive of the servo motor 5, the servo motor 8 is activated, driving the spur gear 9 to rotate, which in turn drives the gear ring 11 to rotate the rotating seat 10. During this process, due to the self-locking effect between the chuck 13 and the bevel gear 20 (this is existing technology, analogous to the chuck self-locking principle), the round steel pipe rotates together with the rotating seat 10 until the intersecting cut surface of the round steel pipe is completely in contact with the surface of the positioning plate 29. The servo motor 8 is then turned off, locking the rotating seat 10 and preventing the rotating seat 10 from causing the round steel pipe to rotate during subsequent welding, which would affect the welding effect.

[0027] A fixed sleeve 15 is fixedly connected to the arc-shaped outer wall of the rotating seat 10. A screw hole 16 is provided on the fixed sleeve 15. A hollow screw 17 is internally threaded into the screw hole 16. A plurality of grooves are evenly provided on the inner wall of the hollow screw 17. A plurality of protrusions 19 are evenly provided on the outer wall of the rotating shaft 18. The protrusions 19 are slidably connected to the grooves. The end of the rotating shaft 18 away from the bevel gear 20 is located in the inner cavity of the fixed sleeve 15. It should also be noted that when adjusting the distance between the four jaws 14, due to the sliding fit between the groove in the hollow screw 17 and the protrusion 19 on the rotating shaft 18, the operator can rotate the hollow screw 17 to drive the rotating shaft 18 to rotate without affecting the transmission effect between the bevel gear 20 and the chuck 13. After the adjustment of the jaws 14 is completed, the threaded fit between the screw hole 16 of the fixing sleeve 15 and the hollow screw 17 can further enhance the locking effect of the jaws 14, preventing the rotating seat 10 from rotating and causing the round steel pipe to shift, which would affect the welding quality.

[0028] Two columns 36 are fixedly connected to the frame 21. The two columns 36 are respectively adapted to the two frames 2. A base plate 37 is fixedly connected to the side of the column 36 near the frame 2. A lifting plate 39 is provided above the base plate 37. Several supports 41 are evenly fixed to the top of the lifting plate 39. An adjustment component is provided in the support 41. A pair of mounting brackets 47 are provided on the support 41. Rollers 48 are rotatably connected to the mounting brackets 47. The rollers 48 are inclined. The column 36 is provided with a lifting component. The lifting assembly includes a second cylinder 38. The second cylinder 38 is fixedly installed on the side wall of the column 36. The output end of the second cylinder 38 is fixedly connected to the lifting plate 39. Several support rods 40 are evenly fixedly connected to the bottom end of the lifting plate 39. The support rods 40 are slidably connected to the base plate 37. The adjustment assembly includes a servo motor 43 and a lead screw 44. The servo motor 43 is fixedly installed on the side of the lifting plate 39 away from the column 36. The top of the support 41 is symmetrically provided with a sliding groove 42. The mounting bracket 47 is slidably connected to the sliding groove 42. The lead screw 44 is rotatably connected in the inner cavity of the support 41. The lead screw 44 is connected to a slider 46 through a lead screw nut pair. The lead screw 44 is symmetrically provided with reverse double threads. The bottom end of the mounting bracket 47 extends into the inner cavity of the support 41 and is fixedly connected to the top of the slider 46. A pair of guide rods 45 are symmetrically fixed in the inner cavity of the support 41. The slider 46 is slidably connected to the guide rods 45. One end of the lead screw 44 extends to the outside of the support 41 and is fixedly connected to a transmission wheel 49. Several transmission wheels 49 are driven by a transmission belt 50. The output end of the servo motor 43 is fixedly connected to one of the lead screws 44. During operation, after the jaws 14 clamp and fix the round steel pipe, the operator starts the servo motor 3 43. The servo motor 3 43 drives one of the lead screws 2 44 to rotate, causing the other lead screws 2 44 to rotate under the transmission of the transmission wheel 49 and the transmission belt 50. This causes the two sliders 46 in the support 41 to slide relative to or opposite to each other, making it easy for the operator to adjust the distance between the rollers 48 on the two mounting brackets 47 according to the size of different round steel pipes. After the distance between the rollers 48 is adjusted, the cylinder 2 38 is started, which drives the lifting plate 39 to rise or fall. This causes the support 41 to drive the rollers 48 to rise or fall together, so that the rollers 48 can support round steel pipes of different sizes after the jaws 14 clamp the round steel pipe, reducing the clamping load of the jaws 14. At the same time, it can also play an auxiliary guiding role when the round steel pipe moves closer to the positioning plate 29.

[0029] An H-shaped plate is fixedly connected between adjacent supports 41, and an auxiliary wheel is rotatably connected to the H-shaped plate. The auxiliary wheel and the transmission wheel 49 are driven by a transmission belt 50. It should be further explained that by setting auxiliary wheels on the H-shaped plates between adjacent supports 41, the tension effect of the transmission belt 50 and the transmission wheel 49 can be guaranteed, which facilitates the transmission between the transmission wheel 49 and the transmission belt 50.

[0030] A welding method for fabricating building steel structures, applicable to the aforementioned welding apparatus for fabricating building steel structures, includes the following steps: S1: The staff first makes a preliminary adjustment to the intersecting cut surfaces of the two round steel pipes, then rotates the hollow screws 17 on the two rotating seats 10 respectively, causing the claws 14 to slide relative to each other, completing the preliminary clamping and fixing of the round steel pipes. Then, the cylinder 23 is started to push the positioning block 24 toward the two round steel pipes until the two limit plates 26 are respectively attached to the corresponding round steel pipes. Then, the arc-shaped support arm 28 is rotated to make the positioning plate 29 rotate between the two round steel pipes. S2: Start servo motor 5, drive moving seat 6 to move the two round steel pipes as a whole towards positioning plate 29. During this process, servo motor 8 is started simultaneously, and rotating seat 10 drives the round steel pipe to rotate and adjust at a small angle until the intersecting cut surface of the round steel pipe is completely in contact with positioning plate 29, thus completing precise alignment. S3: After alignment, start cylinder 23 to move positioning block 24 and positioning plate 29 away from the round steel pipe, and then drive the two round steel pipes to move closer to each other until they fit together through servo motor 5. Finally, start the welding machine body 1 to perform welding operation on the intersecting cut surfaces of the two round steel pipes.

[0031] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0032] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding device for processing building steel structures, characterized in that: The welding machine body (1) includes two frames (2) and one frame (21) on one side. The two frames (2) are symmetrically distributed about the frame (21). The top of each frame (2) is rotatably connected to a lead screw (3). A movable seat (6) is connected to the lead screw (3) via a lead screw nut pair. A mounting seat (7) is fixed to the movable seat (6). A rotating seat (10) is rotatably connected to one side of the mounting seat (7). A four-jaw clamping mechanism is provided on the rotating seat (10). A pair of guide rods (4) are symmetrically fixed to the top of each frame (2). 6) Sliding connection with guide rod 1 (4), servo motor 1 (5) is fixedly installed on one side of each of the two frames 1 (2), the output end of the servo motor 1 (5) is fixedly connected to one end of lead screw 1 (3), a fixed frame (22) is fixedly connected to the top of the frame 2 (21), a cylinder 1 (23) is fixedly installed on the top of the fixed frame (22), a positioning block (24) is fixedly connected to the output end of the cylinder 1 (23), a bracket (27) is fixedly connected to the top of the positioning block (24), an arc-shaped support arm (28) is rotatably connected to the bracket (27), and a positioning plate (29) is fixedly connected to the end of the arc-shaped support arm (28) away from the bracket (27).

2. The welding device for processing building steel structures according to claim 1, characterized in that: The positioning block (24) is fixed to a pair of limiting plates (26) at the end away from the cylinder (23). The included angle between the pair of limiting plates (26) is 90 degrees. The positioning plate (29) is located on the angle bisector between the two limiting plates (26). The two lead screws (3) are vertically distributed. Telescopic rods (25) are fixed to both sides of the fixing frame (22). The end of the telescopic rod (25) away from the fixing frame (22) is fixed to the bottom end of the positioning block (24). The sliding trajectory of the positioning block (24) is located on the angle bisector between the two lead screws (3).

3. The welding device for processing building steel structures according to claim 2, characterized in that: The arc-shaped support arm (28) has a limiting hole (30), and a pair of L-shaped plates (31) are symmetrically fixed on the bracket (27). The L-shaped plates (31) have a through hole one (32) and a through hole two (33). Both the through hole one (32) and the through hole two (33) are provided with limiting rods (34). A spring (35) is fixed between the end of the limiting rod (34) and the L-shaped plate (31). The limiting rod (34) is adapted to the limiting hole (30).

4. The welding device for processing building steel structures according to claim 3, characterized in that: The four-jaw clamping mechanism includes a chuck (13) and jaws (14). The chuck (13) is rotatably connected to the inner cavity of the rotating seat (10). The chuck (13) is provided with a flat threaded disc and a flat gear disc. Four limiting grooves (12) are opened on the side of the rotating seat (10) away from the mounting base (7). The jaws (14) are slidably connected in the limiting grooves (12). The jaws (14) are adapted to the flat threaded disc on the chuck (13). The rotating seat (10) rotates on the outer wall of the outer wall. A rotating shaft (18) is connected, one end of which extends into the rotating seat (10) and is fixedly connected to a bevel gear (20). The bevel gear (20) meshes with a flat gear disk on a chuck (13). A servo motor (8) is fixedly installed on the top of the mounting base (7). A spur gear (9) is fixedly connected to the output end of the servo motor (8). A gear ring (11) meshes with the bottom of the spur gear (9). The gear ring (11) is fixedly connected to the arc-shaped outer wall of the rotating seat (10).

5. The welding device for processing building steel structures according to claim 4, characterized in that: A fixed sleeve (15) is fixedly connected to the arc-shaped outer wall of the rotating seat (10). A screw hole (16) is provided on the fixed sleeve (15). A hollow screw rod (17) is threaded into the screw hole (16). Several grooves are evenly provided on the inner wall of the hollow screw rod (17). Several protrusions (19) are evenly provided on the outer wall of the rotating shaft (18). The protrusions (19) are slidably connected to the grooves. The end of the rotating shaft (18) away from the bevel gear (20) is located in the inner cavity of the fixed sleeve (15).

6. The welding device for processing building steel structures according to claim 5, characterized in that: Two columns (36) are fixedly connected to the second frame (21). The two columns (36) are respectively adapted to the two first frames (2). A base plate (37) is fixedly connected to the side of the column (36) near the first frame (2). A lifting plate (39) is provided above the base plate (37). Several supports (41) are evenly fixed to the top of the lifting plate (39). An adjustment component is provided in the support (41). A pair of mounting brackets (47) are provided on the support (41). Rollers (48) are rotatably connected to the mounting brackets (47). The rollers (48) are inclined. A lifting component is provided on the column (36).

7. The welding device for processing building steel structures according to claim 6, characterized in that: The lifting assembly includes a second cylinder (38). The second cylinder (38) is fixedly installed on the side wall of the column (36). The output end of the second cylinder (38) is fixedly connected to the lifting plate (39). Several support rods (40) are evenly fixedly connected to the bottom end of the lifting plate (39). The support rods (40) are slidably connected to the base plate (37).

8. The welding device for processing building steel structures according to claim 7, characterized in that: The adjustment assembly includes a servo motor three (43) and a lead screw two (44). The servo motor three (43) is fixedly installed on the side of the lifting plate (39) away from the column (36). The top of the support (41) is symmetrically provided with sliding grooves (42). The mounting bracket (47) is slidably connected to the sliding grooves (42). The lead screw two (44) is rotatably connected in the inner cavity of the support (41). The lead screw two (44) is connected to a slider (46) through a lead screw nut pair. The lead screw two (44) is symmetrically provided with reverse double threads. The bottom end of the mounting bracket (47) extends into the inner cavity of the support (41) and is fixedly connected to the top of the slider (46). A pair of guide rods (45) are symmetrically fixed in the inner cavity of the support (41). The slider (46) is slidably connected to the guide rods (45). One end of the lead screw (44) extends to the outside of the support (41) and is fixedly connected to a transmission wheel (49). Several of the transmission wheels (49) are driven by a transmission belt (50). The output end of the servo motor (43) is fixedly connected to one of the lead screws (44).

9. A welding device for processing building steel structures according to claim 8, characterized in that: An H-shaped plate is fixed between adjacent supports (41), and an auxiliary wheel is rotatably connected to the H-shaped plate. The auxiliary wheel and the transmission wheel (49) are driven by a transmission belt (50).

10. A welding method for fabricating building steel structures, characterized in that: This welding method is applicable to the welding apparatus for processing building steel structures as described in claim 9, and the welding method includes the following steps: S1: The staff first made preliminary adjustments to the intersecting cut surfaces of the two round steel pipes, and then rotated the hollow screws (17) on the two rotating seats (10) respectively, causing the claws (14) to slide relative to each other, completing the preliminary clamping and fixing of the round steel pipes. Then, the cylinder one (23) was started, pushing the positioning block (24) to move closer to the two round steel pipes until the two limit plates (26) were respectively attached to the corresponding round steel pipes. Then, the arc-shaped support arm (28) was rotated, so that the positioning plate (29) was rotated between the two round steel pipes. S2: Start servo motor one (5) and drive the moving seat (6) to move the two round steel pipes as a whole towards the positioning plate (29). During this process, servo motor two (8) is started simultaneously and the round steel pipes are rotated at a small angle by rotating seat (10) until the intersecting cutting surface of the round steel pipes is completely in contact with the positioning plate (29) to complete the precise alignment. S3: After alignment, start cylinder one (23) to drive positioning block (24) and positioning plate (29) away from the round steel pipe, and then drive the two round steel pipes to come closer together until they fit together through servo motor one (5). Finally, start the welding machine body (1) to perform welding operation on the intersecting cut surfaces of the two round steel pipes.

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