Pipe manufacturing equipment utilizing laser welding

Abstract

The invention relates to the technical field of pipe manufacturing equipment, and discloses pipe manufacturing equipment utilizing laser welding, the pipe manufacturing equipment comprises uncoiling equipment, roller type forming equipment and welding equipment, after a plate is unfolded by the uncoiling equipment, the plate enters from the feeding end of the roller type forming equipment, and after the plate is rolled into a round pipe by a longitudinal pre-pressing device and a vertical roller rolling device, the round pipe is welded to the welding equipment; the materials enter welding equipment through the discharging end; the welding equipment comprises a laser welding device, a copper cover support and a copper cover installed on the copper cover support, the copper cover covers a welding seam of the circular pipe, a gas pipeline is arranged in the copper cover and comprises a gas inlet and a gas outlet, the gas inlet is formed in the side face or the top of the copper cover, and the gas outlet is formed in the face, close to the welding seam, of the copper cover. The laser welding device comprises a laser welding gun, the laser welding gun is arranged above the copper cover, and a welding head of the laser welding gun is aligned with a welding seam of the circular pipe. According to the pipe manufacturing equipment, the pipe is manufactured through laser welding, and the production quality and the production efficiency of the pipe are improved.

Description

Technical Field

[0001] The present application relates to the technical field of pipe making equipment, and in particular to a pipe making equipment utilizing laser welding. Background Art

[0002] Traditional pipe making equipment usually adopts traditional welding processes such as arc welding and argon arc welding. This traditional welding process has the following technical problems: 1. Slow welding speed. For example, the welding speed of argon arc welding of stainless steel pipes can only reach 2-3m / min, which greatly limits the production efficiency of pipe making; 2. Large heat affected range. For example, when arc welding is used for pipe welding, a large area of ​​the pipe will be affected by high temperature, thereby affecting the performance of the pipe; 3. The quality of the weld is difficult to guarantee. For example, during the arc welding process, the pipe is prone to defects such as pores, cracks, and slag inclusions. The weld surface is not smooth enough, and a lot of subsequent grinding is required, which increases production costs and production cycles.

[0003] Therefore, developing a pipe making device that solves the above technical problems has become an important issue that needs to be solved urgently. Summary of the Invention

[0004] In order to solve the above technical problems, the present application provides a pipe making equipment using laser welding.

[0005] A tube-making device utilizing laser welding, used to form a tube from a sheet material, comprising an unwinding device, a roller forming device, and a welding device arranged in sequence. The sheet material is unwound by the unwinding device and then passes through the roller forming device and the welding device in sequence to form the tube. The roller forming equipment includes a feed end, a flattening device, a longitudinal pre-pressing device, a vertical roller pressing device and a discharge end. The plate enters from the feed end, passes through the flattening device, the longitudinal pre-pressing device and the vertical roller pressing device in sequence, and is rolled into a round tube, and then enters the welding equipment through the discharge end; The welding equipment includes a laser welding device, a copper cover and a copper cover bracket. The copper cover is installed on the copper cover bracket and covers the weld of the round tube. A gas pipeline is provided in the copper cover. The gas pipeline includes an air inlet and an air outlet. The air inlet is provided on the side or top of the copper cover, and the air outlet is provided on the side of the copper cover close to the weld of the round tube. The laser welding device includes a laser welding gun, which is provided above the copper cover, and the welding head of the laser welding gun is aligned with the weld of the round tube.

[0006] Through the above technical scheme, the pipe making equipment of the present application is equipped with an uncoiling device, a roller forming device and a welding device. After the plate is unfolded by the uncoiling device, it enters the roller forming device. The roller forming device rolls the plate into a round tube through the cooperation of the longitudinal pre-pressing device and the vertical roller device, and then enters the welding equipment for welding, thereby realizing the production process of the plate to the pipe; further, the welding equipment of the present application adopts a laser welding device to replace the traditional welding process, and the welding speed is greatly improved, which can reach more than 5m / min, effectively improving the production efficiency of the pipe making; on the other hand, in the welding process of the round tube, after being melted by the laser welding gun, the surface of the round tube is easily reacted with oxygen or air to generate oxides or nitrides. The presence of these products seriously damages the performance of the pipe. In the present application, the welding equipment is also provided with a copper cover, which covers the weld of the round tube. The welding equipment can use the copper cover and the gas pipeline inside it to protect the weld, reduce the influence of external gas on the formation of the weld, improve the quality of the weld, and reduce the occurrence of weld defects.

[0007] In addition, since copper has an extremely high thermal conductivity, when the copper cover is in close contact with the round tube, it can quickly absorb part of the heat in the weld area, preventing local overheating of the round tube, which is beneficial to the formation of the tube and the stability of the weld. Furthermore, the copper cover covers the weld of the round tube, and the molten metal of the weld will form closely to the smooth copper surface when solidifying, making the formed tube surface smoother, reducing subsequent polishing and improving production efficiency.

[0008] Furthermore, the copper cover is provided with at least two air outlets on one side close to the weld of the circular tube, and the two rows of air outlets are arranged axially symmetrically along the weld of the circular tube, and each row of air outlets includes a plurality of air outlet holes spaced apart along the length direction of the weld of the circular tube.

[0009] Through the above technical solution, the gas outlets are arranged symmetrically along the weld axis, and the gas does not act directly on the weld, but on the surrounding side of the weld, which can improve the melting and solidification effect of the weld and effectively improve the quality of the weld. In addition, each row has multiple spaced gas outlets, so that the protective gas can cover the weld more evenly and comprehensively, effectively reducing the probability of defects in the weld caused by external factors, and further improving the quality and stability of the weld.

[0010] Furthermore, the welding equipment also includes a gas nozzle, which is arranged on the top or side of the copper cover, and the nozzle of the gas nozzle is aligned with the weld of the round tube.

[0011] Through the above technical solution, a gas nozzle with a nozzle aimed at the circular tube weld is set on the top or side of the copper cover, which can provide additional protective gas for the weld, reduce the probability of defects in the weld caused by the influence of the external environment during welding, further improve the weld quality, and enhance the mechanical properties and stability of the pipe.

[0012] Furthermore, the gas filled into the gas pipe and the gas ejected from the gas nozzle are argon or helium.

[0013] Through the above technical solution, during the laser welding process, due to the stable chemical properties of argon or helium and its good protective performance, argon or helium can be used to protect the weld, prevent weld oxidation, reduce defects such as pores and cracks in the weld, improve weld quality, and ensure the mechanical properties and stability of the pipe.

[0014] Furthermore, the laser welding device also includes a controller and an actuator. The laser welding gun is equipped with a weld tracking sensor. The controller is used to receive the monitoring signal of the weld tracking sensor, generate an adjustment instruction based on the monitoring signal, and drive the actuator to automatically adjust the position of the welding head of the laser welding gun relative to the weld of the round tube.

[0015] Through the above technical solution, the weld tracking sensor monitors the weld position in real time, and the controller drives the actuator to automatically adjust the position of the laser welding gun welding head based on the monitoring signal, avoiding welding deviation, improving the weld accuracy and quality, meeting the production needs of high-precision pipes, reducing the problem of unstable welding quality caused by manual intervention, and achieving more efficient and stable production.

[0016] Furthermore, the welding equipment also includes a waste gas recovery device, which includes a waste gas recovery pipe, and the air suction port of the waste gas recovery pipe is close to the weld of the circular tube.

[0017] Through the above technical solution, the waste gas recovery pipe can timely recover the waste gas generated during the laser welding process, reducing the harm of the waste gas to the environment and operators, while avoiding the waste gas from affecting the quality of the weld and ensuring the stability of the welding quality.

[0018] Furthermore, the longitudinal pre-pressing device includes a plurality of longitudinal pre-pressing units, each of which includes an upper pre-pressing roller and a lower pre-pressing roller. The contact surface between the upper pre-pressing roller and the plate is an arc-shaped convex surface, and the contact surface between the lower pre-pressing roller and the plate is an arc-shaped concave surface. The arc curvature of the upper pre-pressing roller and the lower pre-pressing roller of the plurality of longitudinal pre-pressing units gradually increases along the conveying direction.

[0019] Through the above technical solution, multiple longitudinal pre-stressing units can enable the plate to gradually achieve a more fitting pre-stressing deformation during the longitudinal pre-stressing process as the arc angle of the pre-stressing upper roller and the pre-stressing lower roller gradually increases, which is conducive to the subsequent smooth forming into a round tube and improves the forming efficiency and quality.

[0020] Furthermore, the vertical roller pressing device includes multiple first vertical roller units, each of which includes two vertical rollers arranged on both sides of the plate, the contact surface between the vertical roller and the plate is an arc-shaped concave surface, and the distance between the two vertical rollers of the multiple first vertical roller units gradually decreases along the conveying direction.

[0021] Through the above technical solution, the distance between the two vertical rollers of the first vertical roller unit gradually decreases along the conveying direction, which can better roll the plate, make the plate gradually shrink, and more accurately form the plate into a round tube, reducing the forming deviation, and preparing for subsequent laser welding to form the tube.

[0022] Furthermore, the vertical roller pressing device also includes a plurality of second vertical roller units, the second vertical roller units including two vertical rollers arranged on both sides of the plate and an upper closing roller located directly above the middle of the two vertical rollers, the middle part of the upper closing roller is a downwardly concave arc surface, the arc surface of the upper closing roller acts on the top of the two wings of the plate, and the plate passes through the plurality of the first vertical roller units and the second vertical roller units in sequence.

[0023] Through the above technical solution, the upper closing roller in the second vertical roller unit is located directly above the middle of the two vertical rollers. The upper closing roller cooperates with the vertical roller to further apply pressure to the plate. Its downward concave arc surface acts on the top of the two wings of the plate, which helps to better roll the plate into a round tube, improve the accuracy and stability of the plate forming, and prepare for subsequent laser welding to form a tube.

[0024] Furthermore, the roller forming equipment also includes a surface roughening component and multiple supporting brackets, the surface roughening component includes a fixed rope and multiple abrasive parts, the abrasive parts are fixed on the fixed rope, the fixed rope is fixed on the multiple supporting brackets, the abrasive parts are located on the top of the upper closing roller and are in contact with the arc surface of the upper closing roller.

[0025] Through the above technical solution, the surface roughening component can roughen the curved surface of the upper closing roller, which can effectively reduce the slipping and displacement of the plate during the rolling process, thereby improving the forming effect and forming quality of the plate by the roller forming equipment, and further entering the welding equipment to realize laser welding.

[0026] In summary, this application has at least the following beneficial technical effects: (1) The welding equipment of this application uses a laser welding device to replace the traditional welding process, which greatly improves the welding speed and can reach more than 5m / min, effectively improving the production efficiency of pipe making; (2) The welding equipment can use the copper cover and its internal gas pipeline to protect the weld, reduce the influence of external gas on the formation of the weld, improve the quality of the weld, and reduce the occurrence of weld defects; (3) When the copper cover is in close contact with the round tube, it can quickly absorb part of the heat in the weld area, preventing local overheating of the round tube, which is beneficial to the formation of the tube and the stability of the weld; (4) The copper cover covers the weld of the round tube. The molten metal of the weld will adhere to the smooth copper surface when solidifying, making the surface of the formed tube smoother, reducing subsequent grinding and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a top view of a pipe manufacturing device using laser welding provided by an embodiment of the present invention; Figure 2 1 is a schematic structural diagram of a longitudinal pre-stressing unit of a pipe manufacturing device utilizing laser welding provided in an embodiment of the present invention; Figure 3 Schematic diagram of the radian change of the upper pre-pressing roller and the lower pre-pressing roller of the longitudinal pre-pressing unit of a pipe making equipment using laser welding provided by an embodiment of the present invention; Figure 4 1 is a front view of a first vertical roller unit of a pipe making device utilizing laser welding provided by an embodiment of the present invention; Figure 5 1 is a front view of a second vertical roller unit of a pipe making device utilizing laser welding provided by an embodiment of the present invention; Figure 6 This is a schematic structural diagram of a plurality of second vertical roller units of a pipe making device utilizing laser welding provided by an embodiment of the present invention; Figure 7 yes Figure 6 A schematic diagram of the structure enlargement at point A; Figure 8 This is a schematic diagram of the structure of a welding device for a pipe manufacturing device using laser welding provided in an embodiment of the present invention; Figure 9 This is a schematic structural diagram of a copper cover of a tube-making device using laser welding provided in an embodiment of the present invention; Figure 10 This is another structural schematic diagram of a copper cover of a tube-making device welded by laser according to an embodiment of the present invention.

[0028] Description of reference numerals: 1. Plate; 2. Pipe; 3. Uncoiling equipment; 6. Air inlet pipe; 4. Roller forming equipment; 41. Feed end; 42. Flattening device; 43. Longitudinal pre-pressing device; 44. Vertical roller pressing device; 45. Discharge end; 46. Surface roughening assembly; 47. Support bracket; 431. Longitudinal pre-pressing unit; 432. Screw lift; 461. Fixing rope; 462. Sanding element; 4311. Upper pre-pressing roller; 4312. Lower pre-pressing roller; 441. First vertical roller unit; 442. Second vertical roller unit; 4412. Chute; 4411. Vertical roller; 4421. Upper closing roller; 5. Welding equipment; 51. Laser welding device; 52. Copper cover; 53. Gas nozzle; 54. Waste gas recovery pipe; 511. Laser welding gun; 512. Controller; 513. Actuator; 521. Arc groove; 522. Air inlet; 523. Air outlet; 5231. Air outlet; 541. Air intake.

[0029] 7. Power transmission equipment; 71. Drive motor; 72. Longitudinal transmission shaft; 73. Transverse transmission box; 74. Force transmission rod. DETAILED DESCRIPTION

[0030] The following is combined with Figures 1-10 Further explanation of this application.

[0031] See Figure 1 An embodiment of the present invention provides a pipe making device using laser welding, which is used to make a plate 1 into a pipe 2, including an uncoiling device 3, a roller forming device 4 and a welding device 5 arranged in sequence. After the plate 1 is unrolled by the uncoiling device 3, it passes through the roller forming device 4 and the welding device 5 in sequence to form a pipe.

[0032] The roller forming equipment 4 includes a feed end 41, a flattening device 42, a longitudinal pre-pressing device 43, a vertical roller pressing device 44 and a discharge end 45. The plate 1 enters from the feed end 41, the flattening device 42 flattens the plate 1, and the longitudinal pre-pressing device 43 and the vertical roller pressing device 44 roll the plate 1 into a round tube, which then enters the welding equipment 5 through the discharge end 45.

[0033] The flattening device 42 includes two horizontal rollers arranged one above the other. The plate 1 passes between the two horizontal rollers, and the two horizontal rollers are driven to flatten the plate.

[0034] The longitudinal pre-pressing device 43 includes a plurality of longitudinal pre-pressing units 431. In this embodiment, three longitudinal pre-pressing units 431 are provided. Figure 2The longitudinal pre-pressing unit 431 includes an upper pre-pressing roller 4311 and a lower pre-pressing roller 4312. The contact surface between the upper pre-pressing roller 4311 and the plate 1 is an arc-shaped convex surface, and the contact surface between the lower pre-pressing roller 4312 and the plate 1 is an arc-shaped concave surface. In the conveying direction of the plate 1, the arc of the convex surface of the upper pre-pressing roller 4311 gradually increases, and the arc of the concave surface of the lower pre-pressing roller 4312 gradually increases (see Figure 3 ), under the pre-pressing of the longitudinal pre-pressing unit 431, the middle of the plate 1 is bent downward, and the two wings of the plate 1 are tilted upward, preparing for the plate 1 to be rolled into a round tube.

[0035] In this embodiment, the longitudinal prestressing device 43 also includes a spiral lifting member 432, and spiral lifting members 432 are respectively provided on both sides of the top of the prestressing upper roller 4311. The prestressing upper roller 4311 can rise or fall in the longitudinal prestressing device 43 through the spiral lifting member 432.

[0036] The vertical roller pressing device 44 includes multiple first vertical roller units 441 and second vertical roller units 442. In this embodiment, three first vertical roller units 441 are provided and three second vertical roller units 442 are provided. The plate 1 passes through the three first vertical roller units 441 and the three second vertical roller units 442 in sequence, thereby rolling the plate 1 into a round tube.

[0037] See Figure 4 The first vertical roller unit 441 includes two vertical rollers 4411 arranged on both sides of the plate 1, and the two vertical rollers are arranged in the chute 4412. The contact surface between the vertical rollers 4411 and the plate 1 is an arc-shaped concave surface. Among them, along the conveying direction of the plate 1, the distance between the two vertical rollers 4411 of the first vertical roller unit 441 gradually decreases in the chute 4412. Under the lateral extrusion of the vertical rollers 4411 on both sides, the two wings of the plate 1 gradually close toward the middle and further enter the second vertical roller unit 442.

[0038] See Figure 5 The second vertical roller unit 442 is different from the first vertical roller unit 441 in that, in addition to the two vertical rollers 4411 arranged on both sides of the plate 1, the second vertical roller unit 442 also includes an upper closing roller 4421 arranged directly above the middle of the two vertical rollers 4411. The middle part of the upper closing roller 4421 is a downwardly concave arc surface, and the arc surface of the upper closing roller 4421 acts on the top of the two wings of the plate 1, forming a downward squeezing force on the plate 1. Under the coordinated action of the vertical rollers 4411 on both sides, the plate 1 can be better rolled into a round tube, and the round tube to be welded enters the welding equipment 5.

[0039] In order to reduce the slippage of the sheet material 1 with the upper closing roller 4421 during the process of forming the round tube, and further improve the quality of the sheet material 1 forming the round tube, refer to Figures 6-7The roller forming equipment 4 also includes a surface roughening component 46 and a plurality of support brackets 47. In this embodiment, two support brackets 47 are provided, which are respectively arranged at the beginning and end of the second vertical roller unit 442. The surface roughening component 46 includes a fixed rope 461 and three grinding pieces 462. The grinding pieces 462 are fixed on the fixed rope 461. The two ends of the fixed rope 461 are respectively fixed on the two support brackets 47, and the grinding pieces 462 are located on the top of the upper closing roller 4421. When the upper closing roller 4421 rotates, the grinding pieces 462 interact with the arc surface of the upper closing roller 4421. Specifically, the grinding pieces 462 are made of grinding paper.

[0040] Continue reading Figure 1 A power transmission device 7 is provided on one side of the roller forming device 4. The power transmission device 7 includes a drive motor 71, a longitudinal transmission shaft 72, a transverse transmission box 73, and a force transmission rod 74. The drive motor 71 is connected to the longitudinal transmission shaft 72 and can drive the longitudinal transmission shaft 72 to rotate. The transverse transmission boxes 73 are sequentially connected and provided in multiple groups. The transverse transmission boxes 73 are connected through the longitudinal transmission shaft 72, and multiple groups of force transmission rods 74 are connected to the transverse transmission boxes 73 in a one-to-one correspondence. The multiple groups of force transmission rods 74 and the transverse transmission boxes 73 are respectively connected to the lower horizontal roller of the flattening device 42, the pre-pressing lower roller 4312 of the longitudinal pre-pressing device 43, and the upper closing roller 4421 of the vertical roller pressing device 44 in a one-to-one correspondence, so that each device can be synchronized and linked.

[0041] See Figure 8 The welding equipment 5 includes a laser welding device 51, a copper cover 52 and a copper cover bracket. The copper cover bracket is installed inside the welding equipment 5. The copper cover 52 is fixed on the copper cover bracket. The copper cover bracket is used to support the copper cover 52. The laser welding device 51 includes a laser welding gun 511. The laser welding gun 511 is set above the copper cover 52 (not directly above).

[0042] See Figures 9-10 An arc-shaped groove 521 is provided at the bottom of the copper cover 52, and the arc-shaped groove 521 is adapted to the welded circular tube structure. A gas pipeline is provided inside the copper cover 52, and the gas pipeline includes an air inlet 522 and an air outlet 523. The air inlet 522 is provided at the top of the copper cover 52, and the air inlet 522 is connected to the external air inlet pipe 6, and protective gas such as argon or helium is filled through the air inlet pipe 6. In this embodiment, the gas filled with the air inlet pipe 6 is argon. The air outlet 523 is opened on the arc-shaped groove 521, and the air outlet 523 is provided with two rows. The two rows of air outlets 523 are axially symmetrically arranged along the central axis of the arc-shaped groove 521, and each row of air outlets 523 is provided with air outlet holes 5231 arranged at intervals.

[0043] Therefore, after the round pipe to be welded enters the welding device 5, the welding head 5111 of the laser welding gun 511 is aligned with the weld on the round pipe, and after the weld on the round pipe is melted by laser on both sides of the weld, the round pipe enters the arc-shaped groove 521 of the copper cover 52 to realize welding, and the pipe material 2 is formed, wherein the round pipe enters the copper cover 52, the copper cover 52 covers the weld on the round pipe, a relatively sealed space is formed between the round pipe and the copper cover 52, the two rows of spaced-apart gas outlets 5231 on the arc-shaped groove 521 are arranged in axial symmetry along the weld of the round pipe, argon is discharged from the gas outlets 5231, and the reaction gas in the relatively sealed space between the round pipe and the copper cover 52 is further extruded, so that air in the air is also avoided from entering the copper cover 52 or the round pipe, the possibility of the reaction of the metal after the weld of the round pipe is melted with oxygen to generate an oxide is reduced, and meanwhile, the copper cover 52 can rapidly absorb part of the heat of the weld area of the round pipe, so that the quality of the pipe material 2 is effectively improved.

[0044] The laser welding device 51 further comprises a controller 512 and an executing mechanism 513, a weld tracking sensor is arranged in the laser welding gun 511, the weld tracking sensor is used to monitor the position of the weld and transmit a monitoring signal to the controller 512, and after the controller 512 receives the monitoring signal, the executing mechanism 513 is driven to automatically adjust the position of the laser welding gun 511, so that the welding head 5111 of the laser welding gun 511 is aligned with the weld of the round pipe.

[0045] In order to further reduce the probability that the weld is affected by the external environment and defects are generated in the welding process, the welding device 5 further comprises a gas nozzle 53, the gas nozzle 53 is arranged on the side of the copper cover 52 and has a certain distance from the weld of the round pipe, a nozzle head of the gas nozzle 53 is aligned with the weld of the round pipe, additional protection gas is provided for the weld, and the gas discharged from the gas nozzle 53 is argon.

[0046] Further, the welding device 5 further comprises a waste gas recovery device, the waste gas recovery device comprises a waste gas recovery pipe 54, and a suction port 541 of the waste gas recovery pipe 54 is close to the weld of the round pipe and is used to absorb the waste gas generated in the process of laser welding of the round pipe.

[0047] The working principle of the pipe manufacturing device is as follows: after the plate material 1 is unfolded from the uncoiling device 3 and enters the roller forming device 4, the plate material 1 is flattened by the horizontal roller of the flattening device 42, the middle part of the two sides of the plate material 1 is concave downward and bends upward through a plurality of longitudinal pre-pressing units 431, the plate material 1 is relatively folded to the middle of the two sides through the first vertical roller unit 441, and the plate material 1 is further folded to the middle of the two sides through the second vertical roller unit 442 to form a round pipe shape, so as to enter the welding device 5, the laser welding gun 511 melts the two side edges of the round pipe-shaped plate material, and the round pipe-shaped plate material in the molten state enters the copper cover 52 to be welded to form the pipe material 2.

[0048] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A tube-making device utilizing laser welding, used to make tubes from sheet materials, characterized in that: It includes an unwinding device, a roller forming device and a welding device which are arranged in sequence. After the plate is unwound by the unwinding device, it passes through the roller forming device and the welding device in sequence to form the pipe. The roller forming equipment includes a feed end, a flattening device, a longitudinal pre-pressing device, a vertical roller pressing device and a discharge end. The plate enters from the feed end, passes through the flattening device, the longitudinal pre-pressing device and the vertical roller pressing device in sequence, and is rolled into a round tube, and then enters the welding equipment through the discharge end; The welding equipment includes a laser welding device, a copper cover and a copper cover bracket. The copper cover is installed on the copper cover bracket and covers the weld of the round tube. A gas pipeline is provided in the copper cover. The gas pipeline includes an air inlet and an air outlet. The air inlet is provided on the side or top of the copper cover, and the air outlet is provided on the side of the copper cover close to the weld of the round tube. The laser welding device includes a laser welding gun, which is provided above the copper cover, and the welding head of the laser welding gun is aligned with the weld of the round tube.

2. The pipe making equipment using laser welding according to claim 1, characterized in that: At least two air outlets are provided on one side of the copper cover close to the weld of the circular tube. The two rows of air outlets are axially symmetrically arranged along the weld of the circular tube. Each row of air outlets includes a plurality of air outlet holes spaced apart along the length direction of the weld of the circular tube.

3. The pipe manufacturing equipment using laser welding according to claim 1, characterized in that: The welding equipment further comprises a gas nozzle, which is arranged on the top or side of the copper cover, and the nozzle of the gas nozzle is aligned with the welding seam of the round tube.

4. The pipe making equipment using laser welding according to claim 3, characterized in that: The gas filled into the gas pipeline and the gas ejected from the gas nozzle are argon or helium.

5. The pipe manufacturing equipment using laser welding according to claim 1, characterized in that: The laser welding device also includes a controller and an actuator. The laser welding gun is equipped with a weld seam tracking sensor. The controller is used to receive a monitoring signal from the weld seam tracking sensor, generate an adjustment instruction based on the monitoring signal, and drive the actuator to automatically adjust the position of the welding head of the laser welding gun relative to the weld of the round tube.

6. The pipe manufacturing equipment using laser welding according to claim 1, characterized in that: The welding equipment further includes a waste gas recovery device, which includes a waste gas recovery pipe, and an air suction port of the waste gas recovery pipe is close to the weld of the circular tube.

7. The pipe manufacturing equipment using laser welding according to claim 1, characterized in that: The longitudinal pre-pressing device includes multiple longitudinal pre-pressing units, each of which includes an upper pre-pressing roller and a lower pre-pressing roller. The contact surface between the upper pre-pressing roller and the plate is an arc-shaped convex surface, and the contact surface between the lower pre-pressing roller and the plate is an arc-shaped concave surface. The arc curvature of the upper pre-pressing roller and the lower pre-pressing roller of the multiple longitudinal pre-pressing units gradually increases along the conveying direction.

8. The pipe manufacturing equipment using laser welding according to claim 1, characterized in that: The vertical roller pressing device includes multiple first vertical roller units, each of which includes two vertical rollers arranged on both sides of the plate. The contact surface between the vertical roller and the plate is an arc-shaped concave surface, and the distance between the two vertical rollers of the multiple first vertical roller units gradually decreases along the conveying direction.

9. The pipe manufacturing equipment using laser welding according to claim 8, characterized in that: The vertical roller pressing device also includes a plurality of second vertical roller units, which include two vertical rollers arranged on both sides of the plate and an upper closing roller located directly above the middle of the two vertical rollers. The middle part of the upper closing roller is a downwardly concave arc surface, and the arc surface of the upper closing roller acts on the top of the two wings of the plate. The plate passes through the plurality of first vertical roller units and second vertical roller units in sequence.

10. The pipe manufacturing equipment using laser welding according to claim 9, characterized in that: The roller forming equipment also includes a surface roughening component and multiple supporting brackets. The surface roughening component includes a fixed rope and multiple abrasive pieces. The abrasive pieces are fixed on the fixed rope, and the fixed rope is fixed on the multiple supporting brackets. The abrasive pieces are located on the top of the upper closing roller and are in contact with the arc surface of the upper closing roller.

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