Welding pipe guide seam welding device and welding method thereof

Abstract

The invention relates to a welding pipe guide seam welding device and a welding method thereof. The welding pipe guide seam welding device comprises a workbench and a welding arm arranged on the workbench. An auxiliary assembly used for moving the welded pipe is arranged on the workbench. The auxiliary assembly comprises a supporting frame arranged above the workbench, a translation plate slidably connected to the interior of the supporting frame, a swing arm rotationally connected to the interior of the translation plate, and a downward pressing arm detachably connected to the surface of the swing arm. The driving piece rotates in one direction to drive the rotating shaft to rotate, then the driving block embedded in the rotating shaft pokes the swing arm, and the swing arm swings downwards to drive the downward pressing arm and the contact plate at the end of the downward pressing arm to be automatically pressed on the surface of the welded pipe. Meanwhile, an electric push rod in the clamping unit automatically loosens a clamping column according to sequential control, then a driving block continues to rotate, a translation plate is driven to slide in the non-welding direction through cooperation of the driving block and a swing arm and the guiding effect of a guiding column, and the welded pipe is stably pulled to move through friction force between a contact plate and the surface of the welded pipe.

Description

Technical Field

[0001] This invention relates to the field of welded pipe guide seam welding technology, specifically to a welded pipe guide seam welding device and its welding method. Background Technology

[0002] Welded pipe, also known as welded steel pipe, refers to pipe made by bending steel strip or plate into round, square, or other shapes and then welding them together. In the production process of welded pipe, guide seam welding is one of the core steps. In existing technology, a roller forming machine is typically used to gradually roll the steel strip into an open cylindrical shape. At this time, a longitudinal gap, i.e., a guide seam, is formed at the butt joint of the steel strip. Subsequently, a welding arm (such as a high-frequency welding or argon arc welding machine) located behind the forming unit continuously welds this longitudinal guide seam, thereby forming a closed pipe blank. With the increasing demand for industrial applications, the continuous welding length of the guide seam for longer welded pipes has also increased. However, in actual production, especially for processing small batches of multi-specification or ultra-long welded pipes, the welding arm stroke and production line length limit the use of a "segmented step-by-step" welding method. That is, the welding arm first welds the longitudinal guide seam in the current area. After the welding of this segment is completed, the welded pipe needs to be moved forward or backward so that the unwelded guide seam part is realigned with the bottom of the welding arm in order to carry out the next segment welding operation. However, the above-mentioned operating methods have obvious safety hazards and efficiency problems. During the welding process, the welding arc or high-frequency current will generate a lot of heat in the local area of ​​the welded pipe, causing the temperature of the weld area and the nearby pipe to rise sharply. After a section of welding is completed, the welded pipe is in a high-temperature state. At this time, in order to move the welded pipe, the operator usually needs to manually intervene to push or pull the welded pipe or adjust it with simple tools. This manual pushing and pulling of the high-temperature welded pipe can easily cause burns to the operator, posing a serious safety risk. At the same time, in order to avoid burns, the operator often needs to wait for the welded pipe to cool down naturally, which will undoubtedly greatly prolong the production auxiliary time, interrupt the production rhythm, and reduce welding efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a welding device for welded pipe guide seams and a welding method thereof.

[0004] The objective of this invention is achieved through the following technical solution: a welding device and welding method for welded pipe guide seams, comprising a workbench and a welding arm disposed on the workbench; The workbench is equipped with auxiliary components for moving the welded pipe; The auxiliary components include a support frame located above the workbench, a translation plate slidably connected within the support frame, a swing arm rotatably connected within the translation plate, a pressure arm detachably connected to the surface of the swing arm, a contact plate fixedly connected to one end of the pressure arm, a support column fixedly connected to the top of the support frame, a rotating shaft rotatably connected within the support column, and a drive block embedded in the surface of the rotating shaft, wherein the surface of the drive block mates with the inner cavity of the swing arm.

[0005] The auxiliary component also includes a limiting plate fixedly connected to the top of the translation plate. A guide post is slidably connected to the inner cavity of the limiting plate. One end of the guide post is fixedly connected to the surface of the driving block. One end of the rotating shaft is connected to a driving component through a coupling. Both the support frame and the top of the translation plate are provided with clearance grooves.

[0006] The auxiliary component also includes a telescopic arm fixedly connected to the bottom of the translation plate. The inner cavity of the telescopic arm is provided with an elastic element, and the bottom of the telescopic arm is provided with a cleaning plate for cleaning the welding slag at the welding part of the welded pipe. The surface of the cleaning plate is chamfered.

[0007] It also includes a clamping unit located on the top of the worktable. The clamping unit includes multiple guide grooves on the top of the worktable, multiple clamping columns slidably connected in the guide grooves, and multiple electric push rods located on the top of the worktable. The surface of the clamping column is provided with a clamping groove that matches the surface of the welded pipe. One end of the output rod of the electric push rod is fixedly connected to the surface of the clamping column. The clamping unit is configured to clamp and fix the welded pipe during the welding process and release it when the auxiliary component moves the welded pipe, so as to realize the alternating clamping and step feeding of the welded pipe.

[0008] It also includes guide units located on both sides of the workbench. Each guide unit includes multiple mounting brackets fixedly connected to both sides of the workbench. The inner cavities of every two mounting brackets are rotatably connected to guide rollers. The guide rollers are configured to support the welded pipe and guide the welded pipe to move along the length of the workbench. The axis of the guide rollers is perpendicular to the axis of the welded pipe.

[0009] The swing arm has an H-shaped structure, the drive block has a triangular structure, and the drive component is a servo motor.

[0010] The drive block is configured to drive the swing arm to swing when the rotating shaft rotates, so that the contact plate presses against or disengages from the surface of the welded pipe. The cleaning plate is configured to move synchronously with the translation plate and always adhere to the surface of the welded pipe under the elastic force of the elastic element to remove the welding slag remaining after welding.

[0011] S1. Place the open cylindrical welded pipe to be welded on the workbench, supported by the guide unit and manually pushed so that it is positioned between the clamping columns and below the welding arm; S2. Start the clamping unit. The electric push rod drives the clamping column to slide along the guide groove and clamp the welded pipe from both sides. S3. Start the welding arm to weld the current section of the longitudinal guide seam of the welded pipe; S4. After welding is completed, start the drive unit to rotate the rotating shaft and perform the step feed operation: a. In the initial stage of the drive block rotation, the drive swing arm swings slightly upward, and at the same time, the guide column drives the translation plate to slide in the support frame towards the welding arm to the predetermined position; b. The drive block continues to rotate, driving the swing arm to swing downward, causing the lower pressure arm and contact plate to descend. At the same time, the telescopic arm, which is fixedly connected to the translation plate, moves the cleaning plate above the welded pipe. The chamfer of the welded pipe contacts the cleaning plate, causing the cleaning plate to move upward and compress the elastic element. The reaction force of the elastic element causes the cleaning plate to adhere to the surface of the welded pipe. c. The drive block continues to rotate, causing the contact plate to press against the surface of the welded pipe. At this time, the electric push rod drives the clamping column to release the welded pipe. d. The drive block continues to rotate in the same direction. Through the cooperation of the drive block and the swing arm and the guidance of the guide column, the translation plate is driven to slide away from the welding arm in the support frame. The friction between the contact plate and the surface of the welded pipe pulls the welded pipe to move a certain distance. e. The drive block continues to rotate, causing the swing arm to swing upward, which in turn lifts the lower pressure arm and the contact plate away from the surface of the welded pipe, and the cleaning plate is lifted accordingly. S5. The electric push rod drives the clamping column again to clamp the welded pipe; S6. Repeat steps S to S until the guide seam welding of the entire welded pipe is completed.

[0012] Compared with the prior art, the advantages of the present invention are as follows: 1. In existing technologies, when welding long welded pipes in sections, operators manually push and pull the pipes, which are at high temperatures, which can easily cause serious burns. This invention achieves automatic step-by-step feeding of the welded pipe through the cooperation of auxiliary components and clamping units. Specifically, the drive component rotates in one direction, driving the rotating shaft to rotate, which in turn causes the drive block embedded in the rotating shaft to move the swing arm. The downward swing of the swing arm causes the lower pressure arm and its end contact plate to automatically press against the surface of the welded pipe. At the same time, the electric push rod in the clamping unit automatically releases the clamping column according to the timing control. Then, the drive block continues to rotate, and through the cooperation of the drive block and the swing arm and the guiding action of the guide column, the translation plate slides towards the unwelded direction. The friction between the contact plate and the surface of the welded pipe is used to smoothly pull the welded pipe. The entire process requires no manual intervention, fundamentally eliminating the possibility of direct contact between the operator and the high-temperature welded pipe, and solving the risk of burns. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of an embodiment of the present invention; Figure 2 This is an exploded view of the worktable and clamping unit of the present invention; Figure 3 This is an exploded view of the workbench and auxiliary components of the present invention; Figure 4 This is a schematic diagram of the structure of the auxiliary component of the present invention; Figure 5 This is a schematic diagram of the structure of the driving block of the present invention; Figure 6 This is a schematic diagram of the cleaning plate of the present invention; Figure 7 This is an exploded view of the support frame and the translation plate of the present invention; Figure 8 This is a schematic diagram of the swing arm of the present invention.

[0014] Labeling Explanation: 1. Workbench; 101. Welding Arm; 2. Support Frame; 201. Translation Plate; 202. Swing Arm; 203. Pressing Arm; 204. Contact Plate; 205. Support Column; 206. Rotating Shaft; 207. Drive Block; 3. Limiting Plate; 301. Guide Column; 302. Drive Component; 303. Clearing Groove; 4. Telescopic Arm; 401. Elastic Component; 402. Cleaning Plate; 5. Guide Groove; 501. Clamping Column; 502. Electric Push Rod; 503. Clamping Groove; 6. Mounting Frame; 601. Guide Roller. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and embodiments: like Figure 1-8 The diagram shown is an embodiment of a welding device and welding method for welded pipe guide seams provided by the present invention, including a workbench 1 and a welding arm 101 disposed on the workbench 1; The workbench 1 is equipped with auxiliary components for moving the welded pipe; The auxiliary components include a support frame 2 located above the workbench 1, a translation plate 201 slidably connected to the support frame 2, a swing arm 202 rotatably connected to the translation plate 201, a pressure arm 203 detachably connected to the surface of the swing arm 202, a contact plate 204 fixedly connected to one end of the pressure arm 203, a support column 205 fixedly connected to the top of the support frame 2, a rotating shaft 206 rotatably connected to the support column 205, and a drive block 207 embedded in the surface of the rotating shaft 206. The surface of the drive block 207 cooperates with the inner cavity of the swing arm 202.

[0016] The auxiliary components also include a limiting plate 3 fixedly connected to the top of the translation plate 201. A guide post 301 is slidably connected to the inner cavity of the limiting plate 3. One end of the guide post 301 is fixedly connected to the surface of the drive block 207. One end of the rotating shaft 206 is connected to the drive component 302 through a coupling. Both the support frame 2 and the top of the translation plate 201 are provided with clearance grooves 303.

[0017] The auxiliary components also include a telescopic arm 4 fixedly connected to the bottom of the translation plate 201. The inner cavity of the telescopic arm 4 is provided with an elastic element 401. The bottom of the telescopic arm 4 is provided with a cleaning plate 402 for cleaning the welding slag at the welding part of the welded pipe. The surface of the cleaning plate 402 is chamfered.

[0018] It also includes a clamping unit located on the top of the workbench 1. The clamping unit includes multiple guide grooves 5 opened on the top of the workbench 1, multiple clamping columns 501 slidably connected in the guide grooves 5, and multiple electric push rods 502 located on the top of the workbench 1. The surface of the clamping column 501 is provided with a clamping groove 503 that matches the surface of the welded pipe. One end of the output rod of the electric push rod 502 is fixedly connected to the surface of the clamping column 501. The clamping unit is configured to clamp and fix the welded pipe during the welding process and release it when the auxiliary component moves the welded pipe, so as to realize the alternating clamping and step feeding of the welded pipe.

[0019] It also includes guide units located on both sides of the workbench 1. Each guide unit includes multiple mounting brackets 6 fixedly connected to both sides of the workbench 1. The inner cavity of each pair of mounting brackets 6 is rotatably connected to a guide roller 601. The guide roller 601 is configured to support the welded pipe and guide the welded pipe to move along the length of the workbench 1. The axis of the guide roller 601 is perpendicular to the axis of the welded pipe.

[0020] The swing arm 202 has an H-shaped structure, the drive block 207 has a triangular structure, and the drive component 302 is a servo motor.

[0021] The drive block 207 is configured to drive the swing arm 202 to swing when the rotating shaft 206 rotates, so that the contact plate 204 presses against or detaches from the surface of the welded pipe. The cleaning plate 402 is configured to move synchronously with the translation plate 201 and always adhere to the surface of the welded pipe under the elastic force of the elastic element 401 to remove the welding slag remaining after welding.

[0022] S1. Place the open cylindrical welded pipe to be welded on the workbench 1, supported by the guide unit and manually push the welded pipe so that it is positioned between the clamping columns 501 and below the welding arm 101. S2. Start the clamping unit. The electric push rod 502 drives the clamping column 501 to slide along the guide groove 5, clamping and fixing the welded pipe from both sides. S3. Start welding arm 101 to perform the current section welding of the longitudinal guide seam of the welded pipe; S4. After welding is completed, start the drive unit 302 to drive the rotating shaft 206 to rotate and perform the step feed operation: a. When the drive block 207 rotates initially, it drives the swing arm 202 to swing slightly upward, and at the same time, it drives the translation plate 201 to slide in the support frame 2 towards the welding arm 101 to the predetermined position through the guide column 301. b. The drive block 207 continues to rotate, driving the swing arm 202 to swing downward, causing the lower pressure arm 203 and the contact plate 204 to descend. At the same time, the telescopic arm 4, which is fixedly connected to the translation plate 201, moves the cleaning plate 402 above the welded pipe. The welded pipe contacts the chamfer of the cleaning plate 402, causing the cleaning plate 402 to move upward and compress the elastic element 401. The reaction force of the elastic element 401 causes the cleaning plate 402 to adhere to the surface of the welded pipe. c. The drive block 207 continues to rotate, causing the contact plate 204 to press against the surface of the welded pipe. At this time, the electric push rod 502 drives the clamping column 501 to release the welded pipe. d. The drive block 207 continues to rotate in the same direction. Through the cooperation between the drive block 207 and the swing arm 202 and the guidance of the guide column 301, the translation plate 201 is driven to slide away from the welding arm 101 in the support frame 2. The friction between the contact plate 204 and the surface of the welded pipe pulls the welded pipe to move a distance. e. The drive block 207 continues to rotate, causing the swing arm 202 to swing upward, which in turn lifts the pressure arm 203 and the contact plate 204 away from the surface of the welded pipe, and the cleaning plate 402 is lifted accordingly. S5. The electric push rod 502 drives the clamping column 501 again to clamp the welded pipe; S6. Repeat steps S3 to S5 until the guide seam welding of the entire welded pipe is completed.

[0023] The core of this invention lies in achieving automatic step-by-step welding of long welded pipes through the timing coordination of auxiliary components and clamping units; Before the device is started, the open cylindrical welded pipe to be welded is placed on the workbench 1 and supported by the guide unit. Then, the welded pipe is pushed by the external end device so that it is positioned between the two clamping columns 501 and below the welding arm 101. Multiple mounting brackets 6 in the guide unit are fixed on both sides of the workbench 1. The guide roller 601 rotatably connected between every two mounting brackets 6 has its axis perpendicular to the axis of the welded pipe and is used to support the welded pipe and guide it to move smoothly along the length of the workbench 1. When welding begins, the clamping unit is activated first; multiple electric push rods 502 on the top of the worktable 1 drive their output rods to push the clamping column 501, which is slidably connected in the guide groove 5, to move towards the welded pipe; the surface of the clamping column 501 is provided with a clamping groove 503 that matches the surface of the welded pipe, and multiple clamping columns 501 clamp and fix the welded pipe from both sides to ensure that the position of the welded pipe is stable during the welding process. Subsequently, welding arm 101 is activated to weld the current section of the longitudinal guide seam of the welded pipe; After the welding arm 101 completes the welding of the current section of the weld, it needs to move the pipe to weld the next section. At this time, the drive component 302 is started. The drive component 302 is a servo motor, which drives the rotating shaft 206 to rotate in the support column 205 through the coupling. The rotating shaft 206 is embedded with a drive block 207. The drive block 207 has a triangular structure and its surface fits with the inner cavity of the swing arm 202. In the initial stage of rotation of the drive block 207, due to the cooperation between the drive block 207 and the swing arm 202, the swing arm 202 will be driven to swing slightly upward relative to the translation plate 201. At the same time, the guide column 301 will drive the translation plate 201 to slide in the support frame 2 towards the welding arm 101 (i.e., towards the welded area). The clearance groove 303 opened at the top of the support frame 2 and the translation plate 201 provides clearance space for the pressure arm 203 and the contact plate 204 to avoid motion interference. After the translation plate 201 slides into place, the drive block 207 continues to rotate. At this time, the swing arm 202 is started to swing downward relative to the translation plate 201. The swing arm 202 has an H-shaped structure and a pressing arm 203 is detachably connected to its surface. When the swing arm 202 swings down, it drives the pressing arm 203 and the contact plate 204 fixed at one end to descend together and approach the surface of the welded pipe. Before the contact plate 204 contacts the welded pipe, the telescopic arm 4, which is fixedly connected to the bottom of the translation plate 201, has moved with the translation plate 201 to above the welded pipe. The inner cavity of the telescopic arm 4 is provided with an elastic element 401, and the bottom of the telescopic arm 4 is provided with a cleaning plate 402, the surface of which is chamfered. When the welded pipe contacts the chamfer of the cleaning plate 402, it will squeeze the cleaning plate 402 to move upward, thereby compressing the elastic element 401. Then the reaction force of the elastic element 401 presses down on the telescopic arm 4, so that the cleaning plate 402 is always in contact with the surface of the welded pipe with a certain pressure. At this time, the welded pipe is still clamped and fixed by the clamping column 501. Therefore, when the cleaning plate 402 moves with the translation plate 201, it can stably clean the welding slag remaining on the surface of the welded pipe after welding, without causing the welded pipe to move due to friction. The drive block 207 continues to rotate, and the swing arm 202 swings down further until the contact plate 204 presses against the surface of the welded pipe; at the instant the contact plate 204 presses against the welded pipe, the electric push rod 502 immediately drives the clamping column 501 to release the welded pipe, so that the welded pipe is in a free state that can be moved. Subsequently, the drive block 207 continues to rotate in the same direction. Through the cooperation between the drive block 207 and the swing arm 202 and the guiding action of the guide column 301, the translation plate 201 is driven to slide in the support frame 2 in a direction away from the welding arm 101 (i.e., the direction of the unwelded area). Since the contact plate 204 has pressed against the surface of the welded pipe, friction is generated between the two. Therefore, the movement of the translation plate 201 will pull the welded pipe to move a distance in the unwelded direction, realizing step feeding. When the translation plate 201 slides to the predetermined position, the drive block 207 continues to rotate. Through its cooperation with the swing arm 202, it drives the swing arm 202 to swing upward, causing the lower pressure arm 203 and the contact plate 204 to rise, so that the contact plate 204 is separated from the surface of the welded pipe; at this time, the telescopic arm 4 and the cleaning plate 402 are also lifted. Subsequently, the electric push rod 502 drives the clamping column 501 to move again, re-clamping and fixing the welded pipe; the welding arm 101 then starts to weld the next section of the newly exposed unwelded guide seam of the welded pipe. The above process is repeated continuously. Through the continuous unidirectional rotation of the drive component 302, the entire set of actions of cleaning welding slag, pressing the welded pipe, releasing the clamp, pulling the welded pipe, disengaging and resetting, and re-clamping are completed in sequence, realizing automatic, safe and efficient welding of the entire welded pipe without the need for manual pushing and pulling of the high-temperature welded pipe.

Claims

1. A welding device for welded pipe guide seams, comprising a workbench (1) and a welding arm (101) disposed on the workbench (1). Its features are: The workbench (1) is equipped with auxiliary components for moving the welded pipe; The auxiliary components include a support frame (2) located above the workbench (1), a translation plate (201) slidably connected to the support frame (2), a swing arm (202) rotatably connected to the translation plate (201), a pressure arm (203) detachably connected to the surface of the swing arm (202), a contact plate (204) fixedly connected to one end of the pressure arm (203), a support column (205) fixedly connected to the top of the support frame (2), a rotating shaft (206) rotatably connected to the support column (205), and a drive block (207) embedded in the surface of the rotating shaft (206). The surface of the drive block (207) is in contact with the inner cavity of the swing arm (202).

2. The welding device for guide seams of welded pipes according to claim 1, characterized in that: The auxiliary components also include a limiting plate (3) fixedly connected to the top of the translation plate (201). The inner cavity of the limiting plate (3) is slidably connected to a guide post (301). One end of the guide post (301) is fixedly connected to the surface of the drive block (207). One end of the rotating shaft (206) is connected to a drive component (302) via a coupling. The top of both the support frame (2) and the translation plate (201) are provided with clearance grooves (303).

3. The welding device for guide seams of welded pipes according to claim 2, characterized in that: The auxiliary component also includes a telescopic arm (4) fixedly connected to the bottom of the translation plate (201). The inner cavity of the telescopic arm (4) is provided with an elastic element (401). The bottom of the telescopic arm (4) is provided with a cleaning plate (402) for cleaning the welding slag at the welding part of the welded pipe. The surface of the cleaning plate (402) is chamfered.

4. The welding device for guide seams of welded pipes according to claim 3, characterized in that: It also includes a clamping unit located on the top of the workbench (1). The clamping unit includes multiple guide grooves (5) opened on the top of the workbench (1), multiple clamping columns (501) slidably connected in the guide grooves (5), and multiple electric push rods (502) located on the top of the workbench (1). The surface of the clamping column (501) is provided with a clamping groove (503) that matches the surface of the welded pipe. One end of the output rod of the electric push rod (502) is fixedly connected to the surface of the clamping column (501). The clamping unit is configured to clamp and fix the welded pipe during the welding process and release it when the auxiliary component moves the welded pipe, so as to realize the alternating clamping and step feeding of the welded pipe.

5. The welding device for guide seams of welded pipes according to claim 4, characterized in that: It also includes guide units located on both sides of the workbench (1). The guide unit includes multiple mounting brackets (6) fixedly connected to both sides of the workbench (1). The inner cavity of each pair of mounting brackets (6) is rotatably connected to a guide roller (601). The guide roller (601) is configured to support the welded pipe and guide the welded pipe to move along the length direction of the workbench (1). The axis of the guide roller (601) is perpendicular to the axis of the welded pipe.

6. The welding device for guide seams of welded pipes according to claim 5, characterized in that: The swing arm (202) has an H-shaped structure, the drive block (207) has a triangular structure, and the drive component (302) is a servo motor.

7. The welding device for guide seams of welded pipes according to claim 6, characterized in that: The drive block (207) is configured to drive the swing arm (202) to swing when the rotating shaft (206) rotates, so that the contact plate (204) presses against or disengages from the welded pipe surface. The cleaning plate (402) is configured to move synchronously with the translation plate (201) and always adhere to the welded pipe surface under the elastic force of the elastic element (401) to remove the welding slag remaining after welding.

8. A welding method for a guide seam of a welded pipe, characterized in that, The welding device for welded pipe guide seams according to any one of claims 1-7, specifically includes the following steps: S1. Place the open cylindrical welded pipe to be welded on the workbench (1), supported by the guide unit and manually push the welded pipe so that it is between the clamping columns (501) and below the welding arm (101); S2. Start the clamping unit, the electric push rod (502) drives the clamping column (501) to slide along the guide groove (5) to clamp and fix the welded pipe from both sides; S3. Start the welding arm (101) to perform the current section welding on the longitudinal guide seam of the welded pipe; S4. After welding is completed, start the drive unit (302) to drive the rotating shaft (206) to rotate and perform step feeding operation: a. When the drive block (207) rotates initially, it drives the swing arm (202) to swing slightly upward. At the same time, the guide column (301) drives the translation plate (201) to slide in the support frame (2) towards the welding arm (101) to the predetermined position. b. The drive block (207) continues to rotate, driving the swing arm (202) to swing downward, causing the pressure arm (203) and the contact plate (204) to descend. At the same time, the telescopic arm (4) fixedly connected to the translation plate (201) drives the cleaning plate (402) to move above the welded pipe. The chamfer of the cleaning plate (402) in contact with the welded pipe causes the cleaning plate (402) to move upward and compress the elastic element (401). The reaction force of the elastic element (401) causes the cleaning plate (402) to adhere to the surface of the welded pipe. c. The drive block (207) continues to rotate so that the contact plate (204) presses the surface of the welded pipe. At this time, the electric push rod (502) drives the clamping column (501) to release the welded pipe. d. The drive block (207) continues to rotate in the same direction. Through the cooperation between the drive block (207) and the swing arm (202) and the guidance of the guide column (301), the translation plate (201) is driven to slide away from the welding arm (101) in the support frame (2). The friction between the contact plate (204) and the surface of the welded pipe pulls the welded pipe to move a distance. e. The drive block (207) continues to rotate, causing the swing arm (202) to swing upward, which in turn lifts the lower pressure arm (203) and the contact plate (204) away from the surface of the welded pipe, and the cleaning plate (402) is lifted accordingly; S5. The electric push rod (502) drives the clamping column (501) again to clamp the welded pipe; S6. Repeat steps S3 to S5 until the guide seam welding of the entire welded pipe is completed.

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