A 360-degree rotating automatic welding method

Abstract

This invention relates to the field of pipe welding technology, specifically to a 360-degree rotating automatic welding method. The welding device includes a welding power supply assembly, a welding carriage assembly, and a wire feeder assembly. A tracked moving assembly is mounted on the lower end of the welding power supply assembly. The welding power supply assembly is electrically connected to the wire feeder assembly via a welding machine ground wire, a welding machine power control wire, and a welding machine power positive wire. The wire feeder assembly is electrically connected to the pipe to be welded via a combination wire, which is also electrically connected to the welding machine ground wire. The wire feeder assembly is connected to the welding torch of the welding carriage assembly via a wire feeding line. A controller is electrically connected to the welding carriage assembly. By setting a core tube assembly inside the pipe sleeve, and under the action of a second spring between the first and second connecting blocks, the bending position of the installation pipe will generate a certain arc when it bends, which can prevent the welding wire from bending at the bending point of the installation pipe and ensure the normal wire feeding speed.

Description

Technical Field

[0001] This invention relates to the field of pipeline welding technology, specifically to a 360-degree rotating automatic welding method. Background Technology

[0002] With advancements in industrial automation research, corresponding technical support has been provided for pipeline engineering construction in my country. Automatic pipeline welding technology has gradually become the mainstream technology, driving the development of my country's oil and gas pipeline construction towards higher efficiency. Pipeline transportation has become a crucial means of oil and gas transport, and correspondingly, pipeline welding has become a key technology for long-distance pipeline laying. With the increasing consumption of oil and natural gas year by year, considering long-term benefits, cost reduction, and safety, pipeline transportation is more feasible than road and rail transport. The laying of pipelines for oil and natural gas transportation involves large spans and harsh construction environments. Furthermore, during pipeline laying, most pipe fittings are fixed during the butt joint welding of circumferential seams, requiring welding equipment capable of 360° omnidirectional welding around the pipeline. Under these circumstances, manual welding results in high labor intensity and low production efficiency for workers.

[0003] The on-site laying operations for long-distance pipelines mainly include pipe end beveling, pipe end assembly, preheating, internal welding, filling, and capping welding. Long-distance pipelines encounter various terrains and landforms, which lead to diverse weld locations, poor joint assembly conditions, and difficulties in controlling weld gaps.

[0004] Automated pipeline welding involves a welding carriage moving along a drive track around the pipe wall to automatically weld the outer circumferential seam. This effectively improves welding efficiency and reduces the labor intensity of welders. Pipeline welding is the most crucial step in pipeline construction, not only ensuring the basic quality of pipeline construction but also affecting the appearance of the completed pipeline.

[0005] The welding torches on some existing pipe welding trolleys require manual adjustment. When the welding environment is confined and it is inconvenient for operators to enter, it is also inconvenient to adjust the position of the welding torch before welding, making it difficult to use. Summary of the Invention

[0006] The technical problem to be solved by this invention is a 360-degree rotating automatic welding method that can improve welding efficiency, welding quality and welding speed, reduce the labor intensity and cost of pipeline welding and speed up pipeline laying.

[0007] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0008] A 360-degree rotating automatic welding method includes the following steps:

[0009] S1. Check the material, roundness, thickness, and bevel style of the pipes to be connected.

[0010] S2. Use an external fitting tool to assemble the pipes that need to be connected. Use manual argon arc welding to weld multiple points in the circumferential direction of the pipe joint. After removing the external fitting tool, use manual argon arc welding to complete the first layer of root pass welding.

[0011] S3. Transfer the welding carriage assembly of the welding device to the vicinity of the pipe joint where the root pass welding has been completed. Use the magnetic wheels at the bottom of the welding carriage assembly to attach the welding carriage assembly to the pipe to be welded. Adjust the distance between the magnetic wheels and the edge of the pipe joint to be welded, and ensure that the axial direction of the four magnetic wheels of the welding carriage assembly is parallel to the axial direction of the pipe to be welded.

[0012] S4. Based on the pipe wall thickness and the thickness of the root pass weld, initially set the width and thickness of the pipe butt weld. Preset the welding parameters on the controller of the welding carriage assembly. Divide the pipe circumference into 12 sections. Input the wire feeding speed, welding current, and welding carriage assembly travel speed values ​​for each section on the controller of the welding carriage assembly.

[0013] S5. Check the pressure of the welding shielding gas cylinder, the wiring connection status of the welding power supply assembly and the wire feeder assembly, and run the welding carriage assembly without load to check whether the welding torch and the pipeline are always aligned.

[0014] S6. Rotate the welding carriage assembly to position the welding torch directly above the 0° circumference of the pipe to be welded. Start the welding carriage assembly to begin welding. After the welding carriage assembly has rotated 180°, grind the welding head and check the welding quality. Once the welding quality is qualified, continue to start the welding carriage assembly to continue welding.

[0015] S7. After the welding carriage assembly rotates 360°, the welding torch is horizontally offset and adjusted by the controller of the welding carriage assembly, and welding is performed continuously without stopping the arc until the entire weld bead is completed.

[0016] Specifically, the welding device includes a welding power supply assembly, a welding carriage assembly, and a wire feeder assembly. A tracked mobile assembly is installed at the lower end of the welding power supply assembly. The welding power supply assembly is electrically connected to the wire feeder assembly through the welding machine ground wire, the welding machine power control wire, and the welding machine power positive wire. The wire feeder assembly is electrically connected to the pipe to be welded through a combination wire, which is also electrically connected to the welding machine ground wire. The wire feeder assembly is connected to the welding torch of the welding carriage assembly through a wire feeding line. A controller is electrically connected to the welding carriage assembly. The device also includes a welding shielding gas cylinder, which is connected to the shielding gas inlet of the wire feeder assembly through a gas rope. The gas rope is connected to the wire feeding line and the welding torch.

[0017] Specifically, the welding trolley assembly includes a housing, a magnetic wheel rotatably connected to the lower end of the housing, a drive assembly inside the housing, and a mounting bracket slidably connected to the housing. The drive assembly can drive the mounting bracket to move along the axial direction of the pipe to be welded, and the welding torch is mounted on the mounting bracket.

[0018] A welding wire box and a wire feeding device are fixed to the outside of the housing. The welding wire in the wire feeding line passes through the welding wire box and the wire feeding device. The wire feeding device is connected to the welding torch through an installation tube. The welding wire passes through the installation tube and the welding torch. The installation tube includes two installation sleeves, which are detachably and fixedly connected to the welding torch and the wire feeding device, respectively. Each installation sleeve is fixed with a limit ring. The two limit rings are fixedly connected through a tube sleeve. The tube sleeve can elastically deform in its length and circumferential directions. A core tube assembly is installed inside the tube sleeve. The end of the core tube assembly is fixedly connected to a limit ring on one side. The core tube assembly includes multiple first connecting blocks and second connecting blocks, which are alternately arranged. Both ends of the first connecting block are machined with arc-shaped convex surfaces, and both ends of the second connecting block are machined with arc-shaped concave surfaces. The angle between the first convex point on the convex surface of the first connecting block and the second convex point on the concave surface of the second connecting block in the circumferential direction of the installation tube is 90 degrees. The angle between the first concave point on the convex surface of the first connecting block and the second concave point on the concave surface of the second connecting block in the circumferential direction of the installation tube is 90 degrees. The angle is 90 degrees. The convex and concave surfaces of adjacent first and second connecting blocks are in contact. Adjacent first and second connecting blocks are connected by an elastic connecting component. The elastic connecting component includes a connecting ring. Four limiting grooves are evenly distributed around the outer circumference of the connecting ring. A second spring is concentrically fixed at one end of the connecting ring. A first mounting groove is opened at the end of each first connecting block. The first mounting groove is concentric with the first connecting block. A second mounting groove is opened at the end of each second connecting block. The second mounting groove is concentric with the second connecting block. The connecting ring is rotatably engaged in the second mounting groove. The end of the second spring away from the connecting ring is fixed in the first mounting groove of the first connecting block. A blind hole is opened on the outer ring wall of the second mounting groove. The axis of the blind hole is perpendicular to the axis of the second mounting groove. A stop block is slidably inserted into the blind hole. One end of the stop block extends into the second mounting groove. The other end of the stop block is connected to the bottom of the blind hole through the first spring. A ball head is machined at one end of the stop block extending into the second mounting groove. The ball head is engaged in one of the limiting grooves of the connecting ring.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. This invention utilizes a welding carriage assembly to achieve 360-degree automatic welding of pipelines. The welding carriage assembly improves welding efficiency, welding quality, and welding speed, while reducing labor intensity and costs associated with pipeline welding and accelerating pipeline laying. Using the welding carriage assembly for 360-degree automatic welding prevents unstable welding quality caused by harsh welding environments. The welding carriage assembly has a simple and compact structure, small size, and is easy to install and use. It is also less susceptible to external vibration and impact, resulting in safer and more stable operation.

[0021] 2. The position of the welding torch and bevel is easily adjustable. The position can be adjusted axially along the pipe using a remote control. Simultaneously, the position can also be adjusted radially. Suitable for confined welding environments.

[0022] 3. By setting a core tube assembly inside the tube sleeve, the distance between the first connecting block and the second connecting block of the core tube assembly can be adjusted. At the same time, under the action of the second spring between the first connecting block and the second connecting block, the bending position of the installation tube will produce a certain arc when it bends, which can avoid the welding wire from bending at the bending point of the installation tube and ensure the normal wire feeding speed of the welding wire.

[0023] 4. Under the action of multiple guide balls in the first and second connecting blocks, the welding wire passing through the bend of the installation tube can reduce the friction between the first and second connecting blocks, prevent the welding wire and the installation tube from being worn, and ensure the welding quality and the service life of the installation tube. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the welding carriage assembly of the present invention.

[0025] Figure 2 This is a schematic diagram of the interior of the casing.

[0026] Figure 3 This is a schematic diagram showing the combination of the welding torch and the tilting mechanism.

[0027] Figure 4 This is a schematic diagram showing the interaction between the motor, lead screw, guide rod, and base.

[0028] Figure 5 This is a cross-sectional view of the mounting pipe.

[0029] Figure 6 for Figure 5 A magnified view of region A in the middle.

[0030] Figure 7 This is a schematic diagram showing the contact between the first protrusion on the first connecting block and the second protrusion on the second connecting block.

[0031] Figure 8 This is a schematic diagram showing the contact between the convex surface on the first connecting block and the concave surface on the second connecting block.

[0032] Figure 9 This is a schematic diagram of the first connecting block.

[0033] Figure 10 This is a schematic diagram of the second connecting block.

[0034] Figure 11 This is a schematic diagram of the connecting ring.

[0035] Figure 12 This is a schematic diagram of a welding device used to weld pipes.

[0036] The names of the components in the attached diagram are:

[0037] 1. Housing; 2. First connecting rod; 3. Motor; 4. Swing structure; 5. Second connecting rod; 6. First mounting slot; 7. Baffle; 8. Magnetic wheel; 9. Mounting tube; 10. Lifting housing; 11. Second mounting slot; 12. Nut; 13. Inner lead screw; 15. Drive device; 16. Welding wire box; 17. Base support; 18. Guide rod; 19. Lead screw; 20. Guide seat; 201. Connecting plate; 21. Mounting sleeve; 22. Tube sleeve; 23. First connecting block; 231. First protrusion; 232. First concave point; 24. Guide ball; 25. Second connecting block; 251 252. Second protrusion; 253. Second concave point; 26. Limiting ring; 27. Stop block; 28. Connecting ring; 281. Limiting groove; 29. ​​First spring; 30. Second spring; 31. Wire feeding device; 101. Combination line; 102. Wire feeder assembly; 103. Welding machine ground wire; 104. Welding machine power control line; 105. Welding power supply assembly; 106. Tracked moving assembly; 107. Welding shielding gas cylinder; 108. Gas rope; 109. Welding machine power positive line; 110. Wire feeding line; 111. Controller; 112. Welding carriage assembly; 113. Welding torch. Detailed Implementation

[0038] A 360-degree rotating automatic welding method includes the following steps:

[0039] S1. Check the material, roundness, thickness, and bevel style of the pipes to be connected.

[0040] S2. Use an external fitting tool to assemble the pipes that need to be connected. Use manual argon arc welding to weld multiple points in the circumferential direction of the pipe joint. After removing the external fitting tool, use manual argon arc welding to complete the first layer of root pass welding.

[0041] S3. Transfer the welding carriage assembly 112 of the welding device to the vicinity of the pipe joint after the initial welding is completed. Use the magnetic wheel 8 at the bottom of the welding carriage assembly 112 to attract the welding carriage assembly 112 onto the pipe to be welded. Adjust the distance between the magnetic wheel 8 and the edge of the pipe joint to be welded to 220mm, and ensure that the axial direction of the four magnetic wheels 8 of the welding carriage assembly 112 is parallel to the axial direction of the pipe to be welded.

[0042] S4. Based on the pipe wall thickness and the thickness of the root pass weld, the width and thickness of the pipe butt weld are initially set. Welding parameters are preset on the controller 111 of the welding carriage assembly 112. The pipe circumference is divided into 12 sections. The wire feeding speed, welding current and the travel speed of the welding carriage assembly 112 are input on the controller 111 of the welding carriage assembly 112.

[0043] S5. Check the pressure of the welding shielding gas cylinder 107, the welding power supply assembly 105, the wire feeder assembly 102 and other wiring connections. Let the welding carriage assembly 112 run empty and check whether the welding torch 113 and the pipe are always aligned.

[0044] S6. Rotate the welding carriage assembly 112 so that the welding torch 113 is positioned directly above the 0° circumference of the pipe to be welded. Start the welding carriage assembly 112 to begin welding. After the welding carriage assembly 112 has rotated 180°, grind the welding head and check the welding quality. Once the welding quality is qualified, continue to start the welding carriage assembly 112 to continue welding.

[0045] S7. After the welding carriage assembly 112 rotates 360°, the welding torch of the welding gun 113 is horizontally offset and adjusted by the controller 111 of the welding carriage assembly 112, and the welding is continuously welded without stopping the arc until the entire weld bead is completed.

[0046] like Figure 12 As shown, the welding apparatus includes a welding power supply assembly 105, a welding carriage assembly 112, and a wire feeder assembly 102. A tracked mobile assembly 106 is mounted on the lower end of the welding power supply assembly 105. The welding power supply assembly 105 is electrically connected to the wire feeder assembly 102 via a welding machine ground wire 103, a welding machine power control wire 104, and a welding machine power positive wire 109. The wire feeder assembly 102 is electrically connected to the pipe to be welded via a combination wire 101, which is also electrically connected to the welding machine ground wire 103. The wire feeder assembly 102 is connected to the welding torch 113 of the welding carriage assembly 112 via a wire feeding wire 110. A controller 111 is electrically connected to the welding carriage assembly 112. It also includes a welding shielding gas cylinder 107, which is connected to the shielding gas inlet of the wire feeder assembly 102 via a gas rope 108. The gas rope 108 is connected to the wire feed line 110 and the welding torch 113.

[0047] like Figures 1-11As shown, the welding trolley assembly 112 includes a housing 1, with a magnetic wheel 8 rotatably connected to the lower end of the housing 1. A drive assembly is disposed inside the housing 1. A mounting bracket is slidably connected to the housing 1, and the drive assembly can drive the mounting bracket to move along the axial direction of the pipe to be welded. The welding torch 113 is mounted on the mounting bracket.

[0048] The drive assembly includes an inner lead screw 13 rotatably connected within a housing 1. The axial direction of the inner lead screw 13 is parallel to the axial direction of the pipe to be welded. A drive device 15 for driving the inner lead screw 13 to rotate is disposed within the housing 1. A nut 12 is fitted onto the inner lead screw 13. The nut 12, the ball bearings, and the inner lead screw 13 constitute a ball screw pair. The nut 12 is slidably connected within the housing 1. During the rotation of the inner lead screw 13 driven by the drive device 15, the nut 12 can move in the axial direction of the inner lead screw 13.

[0049] The mounting bracket includes multiple first connecting rods 2 fixedly connected to nuts 12. These first connecting rods 2 are parallel to the inner lead screw 13 and fixedly connected to a connecting plate 201. A guide seat 20 is fixedly mounted on the connecting plate 201. A lead screw 19 is threadedly connected to the guide seat 20. Guide rods 18 are slidably connected to the guide seats 20 on both sides of the lead screw 19. The guide rods 18 are parallel to the lead screw 19. The lower end of the guide rod 18 is fixedly connected to a base support 17, and the lower end of the lead screw 19 is rotatably connected to the base support 17. A baffle 7 is fixedly mounted on the lower end of the base support 17. A lifting housing 10 is fixed between the motor 3 and the base support 17.

[0050] The upper ends of the two guide rods 18 are fixedly connected to the motor 3, the output shaft of the motor 3 is fixedly connected to the upper end of the lead screw 19, and a second connecting rod 5 is fixed on the motor 3. The second connecting rod 5 is parallel to the first connecting rod 2. During the process of the output shaft of the motor 3 driving the lead screw 19 to rotate, the motor 3, the lead screw 19, the guide rods 18, the base support 17 and the second connecting rod 5 can move in the axial direction of the lead screw 19.

[0051] The second connecting rod 5 is equipped with a swing angle structure 4, and the welding gun 113 is installed on the swing angle structure 4.

[0052] A welding wire box 16 and a wire feeding device 31 are fixed on the outside of the housing 1. The welding wire in the wire feeding line 110 passes through the welding wire box 16 and the wire feeding device 31.

[0053] The wire feeding device 31 is connected to the welding torch 113 through the mounting tube 9, and the welding wire passes through the mounting tube 9 and the welding torch 113.

[0054] The mounting tube 9 includes two mounting sleeves 21, which are detachably and fixedly connected to the welding torch 113 and the wire feeder 31, respectively. Each mounting sleeve 21 has a limiting ring 26 fixed to it, and the two limiting rings 26 are fixedly connected by a sleeve 22, which is a flexible braided tubing. The sleeve 22 is capable of elastic deformation in both its length and circumferential directions. A core tube assembly is fitted inside the sleeve 22, and the end of the core tube assembly is fixedly connected to a limiting ring 26 on one side of it.

[0055] The core tube assembly includes multiple first connecting blocks 23 and second connecting blocks 25. Each of the first connecting blocks 23 and second connecting blocks 25 has a through hole, and multiple guide balls 24 are rotatably connected to the inner wall of each through hole. The first connecting blocks 23 and second connecting blocks 25 are arranged alternately. Both ends of the first connecting block 23 are machined with arc-shaped convex surfaces. Both ends of the second connecting block 25 are machined with arc-shaped concave surfaces. The angle between the first protrusion 231 on the convex surface of the first connecting block 23 and the second protrusion 251 on the concave surface of the second connecting block 25 in the circumferential direction of the mounting tube 9 is 90 degrees. The angle between the first concave point 232 on the convex surface of the first connecting block 23 and the second concave point 252 on the concave surface of the second connecting block 25 in the circumferential direction of the mounting tube 9 is also 90 degrees. The convex and concave surfaces of adjacent first connecting blocks 23 and second connecting blocks 25 are in contact. Adjacent first connecting blocks 23 and second connecting blocks 25 are connected by an elastic connecting assembly.

[0056] The elastic connection assembly includes a connecting ring 28, with four limiting grooves 281 evenly distributed around its outer circumference. A second spring 30 is concentrically fixed to one end of the connecting ring 28. Each end of the first connecting block 23 has a first mounting groove 6, concentric with the first connecting block 23. Each end of the second connecting block 25 has a second mounting groove 11, concentric with the second connecting block 25. The connecting ring 28 is rotatably engaged within the second mounting groove 11, and the end of the second spring 30 furthest from the connecting ring 28 is fixed within the first mounting groove 6 of the first connecting block 23.

[0057] A blind hole is formed on the outer annular wall of the second mounting groove 11, and the axis of the blind hole is perpendicular to the axis of the second mounting groove 11. A stop block 27 is slidably inserted into the blind hole, one end of the stop block 27 extends into the second mounting groove 11, and the other end of the stop block 27 is connected to the bottom of the blind hole by a first spring 29. A ball head is machined on one end of the stop block 27 extending into the second mounting groove 11, and the ball head is engaged in one of the limiting grooves 281 of the connecting ring 28.

[0058] When welding the pipe joints, the drive device 15 is activated, which drives the inner screw 13 to rotate. This, in turn, drives the mounting bracket to move axially along the inner screw 13 via the nut 12 and multiple first connecting rods 2, thereby adjusting the position of the welding torch 113. This positions the welding torch 113 above the pipe joint. The motor 3 drives the screw 19 to rotate, adjusting the distance between the second connecting rod 5 and the pipe to be welded, and thus adjusting the distance between the welding torch 113 and the pipe joint.

[0059] In step S5, during the empty travel of the welding carriage assembly 112, the bending position of the mounting tube 9 during the swing of the welding torch 113 is observed. After the empty travel of the welding carriage assembly 112 is completed, the first connecting block 23 and the second connecting block 25 at the bending position of the mounting tube 9 during the swing of the welding torch 113 are rotated. During adjustment, the adjacent first connecting block 23 and second connecting block 25 are moved away from each other, and the second spring 30 is stretched.

[0060] When the adjacent first connecting block 23 and second connecting block 25 are far apart, the operator's two hands hold the first connecting block 23 and the second connecting block 25 respectively through the sleeve 22. When the operator's two hands are far apart, the sleeve 22 can deform in its length direction and cooperate with the first connecting block 23 and the second connecting block 25 to move away from each other.

[0061] Then, the second connecting block 25 rotates 90 degrees relative to the first connecting block 23 and the connecting ring 28 in the circumferential direction of the second connecting block 25. During the rotation of the second connecting block 25, the sleeve 22 can deform in its circumferential direction and rotate in coordination with the second connecting block 25. During the rotation of the second connecting block 25, under the guidance of the ball head on the stop block 27, the stop block 27 can squeeze the first spring 29 to move into the blind hole. After the second connecting block 25 rotates 90 degrees, one of the limiting grooves 281 corresponds to the ball head of the stop block 27. Under the elastic force of the first spring 29, the ball head of the stop block 27 enters into the corresponding limiting groove 281. At this time, the first protrusion 231 of the convex surface of the first connecting block 23 and the second protrusion 251 of the concave surface of the second connecting block 25 contact each other, and a gap is generated between the first concave point 232 of the convex surface of the first connecting block 23 and the second concave point 252 of the concave surface of the second connecting block 25, which requires the first connecting block 23 and the second connecting block 25 at the bending position of the installation tube 9 to increase the rotation angle. Meanwhile, the second spring 30 can form an arc transition between the first connecting block 23 and the second connecting block 25, which can prevent the first connecting block 23 and the second connecting block 25 from bending after the welding wire is rotated.

[0062] Under the action of multiple guide balls 24 within the first connecting block 23 and the second connecting block 25, the welding wire passing through the bend of the mounting tube 9 can reduce the friction between the welding wire and the first connecting block 23 and the second connecting block 25, preventing the welding wire and the mounting tube 9 from being worn, thus ensuring the welding quality and the service life of the mounting tube 9.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A 360-degree rotating automatic welding method, characterized in that, Includes the following steps: S1. Check the material, roundness, thickness, and bevel style of the pipes to be connected; S2. Use an external fitting tool to assemble the pipes that need to be connected. Use manual argon arc welding to weld at multiple points in the circumferential direction of the pipe joint. After removing the external fitting tool, use manual argon arc welding to complete the first layer of root pass welding. S3. The welding device includes a welding power supply assembly (105), a welding carriage assembly (112), and a wire feeder assembly (102). A tracked moving assembly (106) is installed at the lower end of the welding power supply assembly (105). The welding carriage assembly (112) includes a housing (1). A magnetic wheel (8) is rotatably connected to the lower end of the housing (1). The welding carriage assembly (112) of the welding device is transported to the vicinity of the pipe joint after the root pass welding is completed. The magnetic wheel (8) at the bottom of the welding carriage assembly (112) is used to attract the welding carriage assembly (112) onto the pipe to be welded. The distance between the magnetic wheel (8) and the edge of the pipe joint to be welded is adjusted, and the axial direction of the four magnetic wheels (8) of the welding carriage assembly (112) is parallel to the axial direction of the pipe to be welded. S4. Based on the pipe wall thickness and the thickness of the root pass welding, the width and thickness of the pipe butt weld are initially set. Welding parameters are preset on the controller (111) of the welding carriage assembly (112). The pipe circumference is divided into 12 sections. The wire feeding speed, welding current and the travel speed of the welding carriage assembly (112) are input on the controller (111) of the welding carriage assembly (112). S5. Check the pressure of the welding shielding gas cylinder (107), the wiring connection status of the welding power supply assembly (105) and the wire feeder assembly (102), and the welding carriage assembly (112) travels empty to check whether the welding torch (113) and the pipe are always aligned. S6. Rotate the welding carriage assembly (112) so that the welding gun (113) is directly above the 0° circumference of the pipe to be welded. Start the welding carriage assembly (112) to begin welding. After the welding carriage assembly (112) has rotated 180°, grind the welding head and check the welding quality. After the welding quality is qualified, continue to start the welding carriage assembly (112) to continue welding. S7. After the welding carriage assembly (112) rotates 360°, the welding torch of the welding gun (113) is horizontally offset by the controller (111) of the welding carriage assembly (112) and the welding torch is continuously welded without stopping the arc until the entire weld bead is completed. A drive assembly is provided inside the housing (1), and a mounting frame is slidably connected to the housing (1). The drive assembly can drive the mounting frame to move along the axial direction of the pipe to be welded. The welding gun (113) is mounted on the mounting frame. A wire box (16) and a wire feeding device (31) are fixed on the outside of the housing (1).

2. The 360-degree rotating automatic welding method according to claim 1, characterized in that, The welding power supply assembly (105) is electrically connected to the wire feeder assembly (102) via the welding machine ground wire (103), the welding machine power control line (104), and the welding machine power positive line (109). The wire feeder assembly (102) is electrically connected to the pipe to be welded via the combination line (101). The combination line (101) is electrically connected to the welding machine ground wire (103). The wire feeder assembly (102) is connected to the welding gun (113) of the welding carriage assembly (112) via the wire feed line (110). The controller (111) is electrically connected to the welding carriage assembly (112). The welding shielding gas cylinder (107) is connected to the shielding gas inlet of the wire feeder assembly (102) via the gas rope (108). The gas rope (108) is connected to the wire feed line (110) and the welding gun (113).

3. The 360-degree rotating automatic welding method according to claim 2, characterized in that, The welding wire in the wire feeding line (110) passes through the welding wire box (16) and the wire feeding device (31). The wire feeding device (31) is connected to the welding torch (113) through the mounting tube (9). The welding wire passes through the mounting tube (9) and the welding torch (113). The mounting tube (9) includes two mounting sleeves (21). The two mounting sleeves (21) are detachably and fixedly connected to the welding torch (113) and the wire feeding device (31) respectively. Each mounting sleeve (21) is fixed with a limit ring (26). The two limit rings (26) are fixedly connected through a tube sleeve (22). The tube sleeve (22) can undergo elastic deformation in its length direction and circumferential direction. A core tube assembly is installed inside the tube sleeve (22). The end of the core tube assembly is connected to the limit ring on one side. The positioning ring (26) is fixedly connected. The core tube assembly includes multiple first connecting blocks (23) and second connecting blocks (25). The first connecting blocks (23) and second connecting blocks (25) are alternately arranged. Both ends of the first connecting block (23) are machined with arc-shaped convex surfaces, and both ends of the second connecting block (25) are machined with arc-shaped concave surfaces. The angle between the first convex point (231) on the convex surface of the first connecting block (23) and the second convex point (251) on the concave surface of the second connecting block (25) in the circumferential direction of the mounting tube (9) is 90 degrees. The angle between the first concave point (232) on the convex surface of the first connecting block (23) and the second concave point (252) on the concave surface of the second connecting block (25) in the circumferential direction of the mounting tube (9) is 90 degrees. The angle is 90 degrees. The convex and concave surfaces of adjacent first connecting blocks (23) and second connecting blocks (25) are in contact. Adjacent first connecting blocks (23) and second connecting blocks (25) are connected by an elastic connecting component. The elastic connecting component includes a connecting ring (28). Four limiting grooves (281) are evenly distributed around the outer circumference of the connecting ring (28). A second spring (30) is concentrically fixed at one end of the connecting ring (28). A first mounting groove (6) is opened at the end of each first connecting block (23). The first mounting groove (6) is concentric with the first connecting block (23). A second mounting groove (11) is opened at the end of each second connecting block (25). The second mounting groove (11) is concentric with the second connecting block (25). The connecting ring (28) is rotated and engaged in the second mounting groove (11). The end of the second spring (30) away from the connecting ring (28) is fixed in the first mounting groove (6) of the first connecting block (23). A blind hole is provided on the outer ring wall of the second mounting groove (11). The axis of the blind hole is perpendicular to the axis of the second mounting groove (11). A stop block (27) is slidably inserted in the blind hole. One end of the stop block (27) extends into the second mounting groove (11). The other end of the stop block (27) is connected to the bottom of the blind hole through the first spring (29). A ball head is machined on one end of the stop block (27) extending into the second mounting groove (11). The ball head is engaged in one of the limiting grooves (281) of the connecting ring (28).

4. The 360-degree rotating automatic welding method according to claim 3, characterized in that, The drive assembly includes an inner screw (13) rotatably connected inside the housing (1). The axial direction of the inner screw (13) is parallel to the axial direction of the pipe to be welded. A drive device (15) for driving the inner screw (13) to rotate is provided inside the housing (1). A nut (12) is sleeved on the inner screw (13). The nut (12), the ball, and the inner screw (13) constitute a ball screw pair. The nut (12) is slidably connected inside the housing (1). During the process of the drive device (15) driving the inner screw (13) to rotate, the nut (12) can move in the axial direction of the inner screw (13).

5. The 360-degree rotating automatic welding method according to claim 4, characterized in that, The mounting bracket includes multiple first connecting rods (2) fixedly connected to a nut (12). The multiple first connecting rods (2) are parallel to the inner screw (13). The multiple first connecting rods (2) are fixedly connected to a connecting plate (201). A guide seat (20) is fixedly mounted on the connecting plate (201). A screw (19) is threadedly connected to the guide seat (20). Guide rods (18) are slidably connected to the guide seats (20) on both sides of the screw (19). The guide rods (18) are parallel to the screw (19). The lower end of the guide rod (18) is fixedly connected to the base (17). The lower end of the screw (19) rotates with the base (17). The upper ends of the two guide rods (18) are fixedly connected to the motor (3), the output shaft of the motor (3) is fixedly connected to the upper end of the lead screw (19), the second connecting rod (5) is fixed on the motor (3), the second connecting rod (5) is parallel to the first connecting rod (2), during the process of the output shaft of the motor (3) driving the lead screw (19) to rotate, the motor (3), lead screw (19), guide rod (18), base (17) and second connecting rod (5) can move in the axial direction of the lead screw (19), the second connecting rod (5) is equipped with a swing angle structure (4), and the welding gun (113) is installed on the swing angle structure (4).

6. The 360-degree rotating automatic welding method according to claim 5, characterized in that, A baffle (7) is fixed at the lower end of the base (17), and a lifting shell (10) is fixed between the motor (3) and the base (17).

7. The 360-degree rotating automatic welding method according to claim 3, characterized in that, The sleeve (22) is a soft snakeskin tube.

8. The 360-degree rotating automatic welding method according to claim 3, characterized in that, Both the first connecting block (23) and the second connecting block (25) have through holes, and multiple guide balls (24) are rotatably connected to the inner wall of each through hole.

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