High-frequency welded pipe forming device and working method thereof

Abstract

The invention relates to a high-frequency welded pipe forming device and a working method thereof.The high-frequency welded pipe forming device comprises a raw material preparation and inlet section, a forming and welding section, a post-welding finishing and processing section and a detecting and cutting-off section, the raw material preparation and inlet section comprises an uncoiler, a leveler and a shearing butt welding machine, and the forming and welding section comprises a forming main machine and a high-frequency welding device; the post-welding finishing and processing section comprises an inner and outer burr removing device, a sizing mill, a weld joint online heat treatment device, a cooling device and a straightening machine, and the detecting and cutting section comprises nondestructive testing equipment and a splitting machine. The arc-shaped groove-guide rod mechanism is driven by the motor, electric, synchronous and radial adjustment of the positions of the inner scraper, the outer scraper and the guide wheel is achieved, when the pipe diameter specification is replaced, all working elements can be rapidly and accurately adjusted to the position corresponding to a new pipe diameter, the shutdown adjustment time is greatly shortened, and the production flexibility and efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of high-frequency welded pipe processing technology, and in particular to a high-frequency welded pipe forming device and its working method. Background Technology

[0002] High-frequency welded pipes are widely used in fluid transportation, building structures, and other fields due to their advantages such as high production efficiency, low cost, and flexible specifications. A typical production process includes: raw material preparation → forming → high-frequency welding → burr removal → sizing and straightening → inspection and cutting. Among these, the removal of internal and external burrs after welding is a crucial step in ensuring the quality of the welded pipe and meeting the requirements of subsequent processing and use.

[0003] Existing internal and external burr removal technologies mainly have the following problems: Difficult to adjust and poor adaptability: Traditional scraper mechanisms are mostly rigidly fixed or manually adjustable. When changing to welded pipes of different specifications (pipe diameter, wall thickness), it is necessary to stop the machine and spend a lot of time readjusting the position of the scraper and guide wheel, which affects production efficiency. Incomplete or overcut damage: Due to the radial runout and straightness deviation of the welded pipe during the forming and transportation process, the rigidly fixed scraper is difficult to always accurately align and track the weld position, which can easily lead to incomplete removal of burrs (residue) or damage to the pipe base material due to overcutting, affecting the strength and surface quality of the welded pipe. The asynchronous removal of internal and external burrs affects accuracy: The external burr removal mechanism and the internal burr removal mechanism (the cutter on the mandrel) are usually set and adjusted independently, making it difficult to ensure the concentricity and synchronicity of the internal and external cutters on the weld during removal, which may result in uneven wall thickness between the inside and outside of the weld area after removal. Low level of automation: The adjustment process relies on human experience and lacks a fast and accurate automatic alignment and tracking compensation mechanism, which cannot meet the requirements of stability and consistency for high-speed continuous production. Summary of the Invention

[0004] The problem solved by this invention is to provide a high-frequency welded pipe forming device and its working method. Through an innovative internal and external burr removal mechanism, it integrates electric adjustment, elastic floating and mechanical linkage functions, realizes rapid and accurate setting of the scraper position and adaptive tracking of welded pipe jumping, thereby ensuring the quality, efficiency and adaptability of burr removal.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A high-frequency welded pipe forming device includes a raw material preparation and inlet section, a forming and welding section, a post-weld finishing and processing section, and an inspection and cutting section. The raw material preparation and inlet section includes an uncoiler, a leveler, and a shearing and welding machine. The forming and welding section includes a forming host and a high-frequency welding device. The post-weld finishing and processing section includes an internal and external burr removal device, a sizing machine, an online heat treatment device for welds, a cooling device, and a straightening machine. The inspection and cutting section includes non-destructive testing equipment and a slitting machine. The internal and external burr removal device includes a worktable, an external burr removal mechanism, a mandrel connected to the forming host frame, and an internal burr removal mechanism installed at the end of the mandrel. The external burr removal mechanism is located outside the high-frequency welded pipe, and the internal burr removal mechanism is located inside the high-frequency welded pipe. The external burr removal mechanism includes a first ring cover, which is mounted on the worktable via a support leg. An adjusting ring is elastically installed inside the first ring cover. Several first translation grooves and a first guide rail parallel to the first translation grooves are opened at equal angles on the adjusting ring. A first slide is slidably installed on the first guide rail. An external scraper is installed on one of the first slides, and external limiting guide wheels are installed on the other several first slides. The internal burr removal mechanism includes a support plate connected to the end of the spindle. A second ring cover is elastically fitted on the outside of the support plate. A first adjusting plate is installed on the second ring cover. A plurality of second translation grooves and a second guide rail parallel to the second translation grooves are opened at equal angles on the first adjusting plate. A second carriage is slidably installed on the second guide rail. An internal scraper is installed on one of the second carriages, and an internal limiting guide wheel is installed on the other several second carriages.

[0006] Preferably, a plurality of first mounting grooves are provided on the inner side of the first ring cover and the outer side of the adjusting ring, and the end of the first spring is installed in the first mounting groove.

[0007] Preferably, a rotating ring is mounted on the bearing of the adjusting ring, and a plurality of first arc-shaped grooves are formed at equal angles on the rotating ring. A first guide rod is mounted on the first slide that passes through the first translation groove and the first arc-shaped groove.

[0008] Preferably, the outer side of the rotating ring is provided with external teeth, and a first motor is installed on the adjusting ring. The output end of the first motor is provided with rotating teeth, and the rotating teeth mesh with the external teeth.

[0009] Preferably, a plurality of second mounting slots are provided on the outer side of the support plate and the inner side of the second ring cover, and the end of the second spring is installed in the second mounting slot.

[0010] Preferably, a second turntable is mounted on the outer bearing of the first adjusting plate, and a plurality of second arc-shaped grooves are formed at equal angles on the second turntable. A second guide rod is mounted on the second slide block, passing through the second translation groove and the second arc-shaped groove.

[0011] Preferably, a second motor is installed at the center of the second turntable, and the output end of the second motor is fixedly connected to the center of the first adjustment plate.

[0012] Preferably, both the outer limiting guide wheel and the outer scraper are in contact with the outer wall of the high-frequency welded pipe, and the bottom curvature of the outer scraper is the same as the curvature of the outer wall of the high-frequency welded pipe.

[0013] Preferably, both the inner limiting guide wheel and the inner scraper are in contact with the inner wall of the high-frequency welded pipe, and the curvature of the top of the inner scraper is the same as the curvature of the inner wall of the high-frequency welded pipe.

[0014] A working method for a high-frequency welded pipe forming device, the specific operating steps of which are as follows: Step 1: The strip steel is uncoiled by the uncoiler, leveled by the leveler, and connected into a continuous strip by the shearing and welding machine. It then enters the forming machine and is gradually rolled into a circle, so that the edge forms a "V" shaped opening to be welded. Subsequently, the high-frequency welding device heats the edge to a molten state, and the welding is completed by the extrusion roller, forming a welded pipe with internal and external burrs. Step 2: Start the first motor to drive the rotating gear. The rotating ring rotates through the meshing external gear. The first arc groove on the rotating ring pushes the first guide rod, causing the first slide to move radially along the first guide rail. At this time, the outer limit guide wheel and the outer scraper on the first slide are in contact with the outer wall of the high-frequency welded pipe, and the outer scraper is located at the weld scar on the outer side of the high-frequency welded pipe. The outer burr removal mechanism and the high-frequency welded pipe are installed concentrically. Start the second motor to rotate the second turntable. The second arc groove on the second turntable pushes the second guide rod, causing the second slide to move radially along the first guide rail. At this time, the inner limit guide wheel and the inner scraper on the second slide are in contact with the inner wall of the high-frequency welded pipe, and the inner scraper is located at the weld scar on the inner side of the high-frequency welded pipe. The inner burr removal mechanism and the high-frequency welded pipe are installed concentrically. Step 3: As the high-frequency welded pipe moves, the weld metal protrusions at the weld scar are scraped off by the outer and inner scrapers. When the high-frequency welded pipe moves, it shakes. At this time, the outer limiting guide wheel and the outer scraper are in close contact with the outer wall of the high-frequency welded pipe. Under the action of the first spring, the entire adjusting ring floats radially relative to the first ring cover, thereby realizing the dynamic tracking of the outer limiting guide wheel and the outer scraper to the center of the welded pipe. The inner limiting guide wheel and the inner scraper are in close contact with the inner wall of the high-frequency welded pipe. Under the action of the second spring, the first adjusting plate and the second ring cover float as a whole relative to the support plate. The outer limiting guide wheel and the inner scraper always follow the instantaneous center of the welded pipe. Step 4: After deburring, the high-frequency welded pipe enters the sizing machine, where its outer diameter and roundness are precisely calibrated. The weld performance is improved by an online heat treatment device, and then it is cooled by a cooling device. Subsequently, the straightening machine corrects the straightness. Step 5: The finished high-frequency welded pipes undergo online quality inspection using non-destructive testing equipment. Finally, qualified high-frequency welded pipes are cut to the set length by a slitting machine, completing the production process.

[0015] The beneficial effects of this invention are: Fast and precise adjustment with strong adaptability: The electric, synchronous, and radial adjustment of the positions of the inner and outer scrapers and guide wheels is achieved through the motor-driven arc groove-guide rod mechanism. When changing pipe diameter specifications, all working elements can be quickly and accurately adjusted to the positions corresponding to the new pipe diameter, greatly reducing downtime for adjustment and improving production flexibility and efficiency. Adaptive floating tracking for high-quality burr removal: The elastic support provided by the spring assembly allows the entire scraping unit to float radially within a small range relative to the fixed part. This enables the scraper and guide wheel to compensate for the radial runout of the welded pipe in real time, always accurately tracking the weld seam and ensuring that burrs are continuously, stably, and thoroughly removed, while avoiding over-cutting the pipe. Internal and external synchronization and concentricity guarantee: The internal and external cleaning mechanisms adopt similar and independent adjustment and floating principles, which can be accurately aligned separately. Combined with reasonable initial positioning, it can ensure that the internal and external scrapers act on the same circumference of the weld during cleaning, which helps to ensure the uniformity of the weld thickness after cleaning. Automation and reliability enhancement: The electrification of the adjustment process reduces human intervention and errors, and the flexible floating structure replaces the complex servo tracking system. The structure is simple, reliable, and lower in cost, making it more suitable for industrial environments. Integrated continuous production: As the core of the post-weld finishing section, this device is seamlessly connected with the preceding and following processes, supporting the automated, continuous, and high-quality production of high-frequency welded pipes throughout the entire process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the internal and external burr removal device of the present invention; Figure 2 This is a schematic diagram of the first structure of the external burr removal mechanism of the present invention; Figure 3 This is a schematic diagram of the second structure of the external burr removal mechanism of the present invention; Figure 4 This is a cross-sectional view of the external burr removal mechanism of the present invention; Figure 5 This is a schematic diagram of the first structure of the internal burr removal mechanism of the present invention; Figure 6 This is a schematic diagram of the second structure of the internal burr removal mechanism of the present invention; Figure 7 This is a cross-sectional view of the internal burr removal mechanism of the present invention.

[0017] Legend: 1. Workbench; 2. External burr removal mechanism; 3. Spindle; 4. Internal burr removal mechanism; 5. Support leg; 6. First ring cover; 7. Adjusting ring; 8. First mounting groove; 9. First spring; 10. First translation groove; 11. First guide rail; 12. First carriage; 13. External limit guide wheel; 14. External scraper; 15. Rotary ring; 16. First arc groove; 17. First guide rod; 18. First motor; 19. Rotary gear; 20. External gear; 21. Support plate; 22. Second ring cover; 23. Second mounting groove; 24. Second spring; 25. First adjusting plate; 26. Second translation groove; 27. Second guide rail; 28. Second carriage; 29. ​​Internal limit guide wheel; 30. Internal scraper; 31. Second turntable; 32. Second arc groove; 33. Second guide rod; 34. Second motor. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Specific implementation examples are given below.

[0020] See Figures 1-7 A high-frequency welded pipe forming device includes a raw material preparation and inlet section, a forming and welding section, a post-weld finishing and processing section, and an inspection and cutting section. The raw material preparation and inlet section includes an uncoiler, a leveler, and a shearing and welding machine. The forming and welding section includes a forming host and a high-frequency welding device. The post-weld finishing and processing section includes an internal and external burr removal device, a sizing machine, an online heat treatment device for welds, a cooling device, and a straightening machine. The inspection and cutting section includes non-destructive testing equipment and a slitting machine. The internal and external burr removal device includes a worktable 1, an external burr removal mechanism 2, a spindle 3 connected to the forming host frame, and an internal burr removal mechanism 4 installed at the end of the spindle 3. The worktable 1 supports the external mechanism, and the spindle 3, as an extension support arm of the internal mechanism, extends into the tube to achieve the alignment of the internal and external mechanisms. The external burr removal mechanism 2 is located outside the high-frequency welded tube, and the internal burr removal mechanism 4 is located inside the high-frequency welded tube. The external burr removal mechanism 2 includes a first ring cover 6, which is mounted on the worktable 1 via support legs 5. An adjusting ring 7 is elastically installed inside the first ring cover 6, and the adjusting ring 7 is elastically suspended from the first ring cover 6 by multiple sets of first springs 9. Inside the cover 6, a radial elastic floating system is formed. When the high-frequency welded pipe jumps or becomes eccentric, its outer wall pushes the adjusting ring 7 through the outer limiting guide wheel 13, allowing the entire adjusting ring 7 to float radially within a small range relative to the first ring cover 6. This ensures that the working parts can adaptively track the instantaneous center of the high-frequency welded pipe and maintain constant contact pressure. Several first mounting grooves 8 are provided on the inner side of the first ring cover 6 and the outer side of the adjusting ring 7, and the end of the first spring 9 is installed in the first mounting groove 8. Several first translation grooves 10 and a first guide rail 11 parallel to the first translation grooves 10 are provided on the adjusting ring 7 at equal angles. A sliding part is mounted on the first guide rail 11. The first slide 12 has an outer scraper 14 mounted on one of its slides, and outer limiting guide wheels 13 mounted on several other slides. Both the outer limiting guide wheels 13 and the outer scraper 14 are in contact with the outer wall of the high-frequency welded pipe, and the bottom curvature of the outer scraper 14 is the same as the curvature of the outer wall of the high-frequency welded pipe. A rotating ring 15 is mounted on a bearing on an adjusting ring 7. Several first arc-shaped grooves 16 are formed at equal angles on the rotating ring 15. A first guide rod 17 is mounted on the first slide 12, penetrating the first translation groove 10 and the first arc-shaped grooves 16. External teeth 20 are provided on the outer side of the rotating ring 15. A first motor 18 is mounted on the adjusting ring 7, and the output end of the first motor 18 is equipped with… There is a rotating tooth 19, which meshes with the external tooth 20. The first motor 18 drives the rotating tooth 19, which in turn drives the meshing external tooth 20 and the rotating ring 15 to rotate. When the rotating ring 15 rotates, the side wall of the first arc groove 16 pushes the first guide rod 17. Since the first guide rod 17 is restricted by the first translation groove 10 to move only radially, all the first slides 12 are forced to move radially synchronously and equidistantly, thereby quickly adapting to high-frequency welded pipes with different outer diameters. This enables one-click synchronous adjustment of the positions of the external scraper 14 and the external limiting guide wheel 13, realizing the functional separation of "centering with the wheel and scraping with the knife". The guide wheel is responsible for adaptation and positioning, and the scraper is responsible for precise cleaning. The internal burr removal mechanism 4 includes a support plate 21 connected to the end of the spindle 3. A second ring cover 22 is elastically fitted on the outside of the support plate 21. Several second mounting grooves 23 are formed on the outside of the support plate 21 and the inside of the second ring cover 22. The end of the second spring 24 is installed in the second mounting groove 23, forming a radial elastic floating system. This allows the core part of the internal burr removal mechanism 4 to float with the movement of the inner wall of the welded pipe, achieving adaptive tracking. A first adjusting plate 25 is installed on the second ring cover 22. Several second translation grooves 26 and second guide rails 27 parallel to the second translation grooves 26 are formed on the first adjusting plate 25 at equal angles. Second slides 28 are slidably installed on the second guide rails 27. An inner scraper 30 is installed on one of the second slides 28, and inner limiting guide wheels 29 are installed on the other several second slides 28. Both the inner limiting guide wheels 29 and the inner scraper 30 are in contact with the inner wall of the high-frequency welded pipe. The top arc of the inner scraper 30 is the same as the arc of the inner wall of the high-frequency welded pipe. The second turntable 31 is mounted on the outer bearing of the first adjusting plate 25. Several second arc-shaped grooves 32 are opened at equal angles on the second turntable 31. The second guide rod 33 is installed on the second slide 28, passing through the second translation groove 26 and the second arc-shaped groove 32. The second motor 34 is installed at the center of the second turntable 31, and the output end of the second motor 34 is fixedly connected to the center of the first adjusting plate 25. The second motor 34 works to make the second turntable 31 rotate. Since its output shaft is directly fixed at the center of the first adjusting plate 25, the second turntable 31 rotates relative to the first adjusting plate 25, thereby driving the second slide 28 to move synchronously and equidistantly along the radial direction through the second arc-shaped groove 32, so as to quickly adapt to high-frequency welded pipes with different inner diameters. The inner limiting guide wheel 29 rolls in contact with the inner wall of the pipe to center and transmit the jump. The inner scraper 30 is responsible for removing the inner burrs.

[0021] Working principle: The strip steel is unrolled by the uncoiler, leveled by the leveler, and connected into a continuous strip by the shearing and welding machine. It then enters the forming machine and is gradually rolled into a circle, so that its edge forms a "V" shaped opening to be welded. Subsequently, the high-frequency welding device heats the edge to a molten state and the extrusion rollers extrude it to complete the welding, forming a welded pipe with internal and external burrs. The first motor 18 is started to drive the rotating gear 19, which rotates the ring 15 through the meshing external gear 20. The first arc groove 16 on the ring 15 pushes the first guide rod 17, causing the first slide 12 to move radially along the first guide rail 11. At this time, the outer limiting guide wheel 13 and the outer scraper 14 on the first slide 12 are in contact with the outer wall of the high-frequency welded pipe, and the outer scraper 14 is located at the weld scar on the outer side of the high-frequency welded pipe. The outer burr removal mechanism 2 and the high-frequency welded pipe are installed concentrically. The second motor 34 is started to rotate the second turntable 31. The second arc groove 32 on the second turntable 31 pushes the second guide rod 33, causing the second slide 28 to move radially along the first guide rail 11. At this time, the inner limiting guide wheel 29 and the inner scraper 30 on the second slide 28 are in contact with the inner wall of the high-frequency welded pipe, and the inner scraper 30 is located at the weld scar on the inner side of the high-frequency welded pipe. The inner burr removal mechanism 4 and the high-frequency welded pipe are installed concentrically. As the high-frequency welded pipe moves, the weld metal protrusion at the weld scar is scraped off by the outer scraper 14 and the inner scraper 30. When the high-frequency welded pipe moves, it shakes. At this time, the outer limit guide wheel 13 and the outer scraper 14 are in close contact with the outer wall of the high-frequency welded pipe. Under the action of the first spring 9, the entire adjusting ring 7 floats radially relative to the first ring cover 6, thereby realizing the dynamic tracking of the outer limit guide wheel 13 and the outer scraper 14 to the center of the welded pipe. The inner limit guide wheel 29 and the inner scraper 30 are in close contact with the inner wall of the high-frequency welded pipe. Under the action of the second spring 24, the first adjusting plate 25 and the second ring cover 22 float as a whole relative to the support plate 21. The outer limit guide wheel 13 and the inner scraper 30 always follow the instantaneous center of the welded pipe. After the burrs are removed, the high-frequency welded pipe enters the sizing machine, where its outer diameter and roundness are precisely calibrated. The weld performance is improved by an online heat treatment device, and then it is cooled by a cooling device. Subsequently, the straightening machine corrects the straightness. After finishing, the high-frequency welded pipes undergo online quality inspection using non-destructive testing equipment. Finally, qualified high-frequency welded pipes are cut to the set length by a slitting machine, completing the production process.

[0022] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-frequency welded pipe forming device, characterized in that, It includes a raw material preparation and entry section, a forming and welding section, a post-weld finishing and processing section, and an inspection and cutting section. The raw material preparation and entry section includes an uncoiler, a leveler, and a shearing and welding machine. The forming and welding section includes a forming host and a high-frequency welding device. The post-weld finishing and processing section includes an internal and external burr removal device, a sizing machine, an online heat treatment device for welds, a cooling device, and a straightening machine. The inspection and cutting section includes non-destructive testing equipment and a slitting machine. The internal and external burr removal device includes a workbench (1), an external burr removal mechanism (2), a spindle (3) connected to the forming host frame, and an internal burr removal mechanism (4) installed at the end of the spindle (3). The external burr removal mechanism (2) is located outside the high-frequency welded pipe, and the internal burr removal mechanism (4) is located inside the high-frequency welded pipe. The external burr removal mechanism (2) includes a first ring cover (6), and the first ring cover (6) is installed on the workbench (1) by a support leg (5). An adjusting ring (7) is elastically installed inside the first ring cover (6). Several first translation grooves (10) and a first guide rail (11) parallel to the first translation grooves (10) are opened at equal angles on the adjusting ring (7). A first slide (12) is slidably installed on the first guide rail (11). An external scraper (14) is installed on one of the first slides (12), and an external limiting guide wheel (13) is installed on the other several first slides (12). The internal burr removal mechanism (4) includes a support plate (21) connected to the end of the spindle (3). A second ring cover (22) is elastically fitted on the outside of the support plate (21). A first adjusting plate (25) is installed on the second ring cover (22). A plurality of second translation grooves (26) and a second guide rail (27) parallel to the second translation grooves (26) are opened at equal angles on the first adjusting plate (25). A second slide (28) is slidably installed on the second guide rail (27). An internal scraper (30) is installed on one of the second slides (28), and an internal limiting guide wheel (29) is installed on the other several second slides (28).

2. The high-frequency welded pipe forming device according to claim 1, characterized in that, The inner side of the first ring cover (6) and the outer side of the adjusting ring (7) are provided with a plurality of first mounting grooves (8), and the end of the first spring (9) is installed in the first mounting groove (8).

3. The high-frequency welded pipe forming device according to claim 2, characterized in that, The adjusting ring (7) is mounted on a bearing with a rotating ring (15). The rotating ring (15) has several first arc-shaped grooves (16) at equal angles. The first slide (12) is mounted with a first guide rod (17) that passes through the first translation groove (10) and the first arc-shaped groove (16).

4. The high-frequency welded pipe forming device according to claim 3, characterized in that, The outer side of the rotating ring (15) is provided with external teeth (20), and the first motor (18) is installed on the adjusting ring (7). The output end of the first motor (18) is provided with rotating teeth (19), and the rotating teeth (19) mesh with the external teeth (20).

5. The high-frequency welded pipe forming device according to claim 4, characterized in that, A plurality of second mounting slots (23) are provided on the outer side of the support plate (21) and the inner side of the second ring cover (22), and the end of the second spring (24) is installed in the second mounting slot (23).

6. The high-frequency welded pipe forming device according to claim 5, characterized in that, The first adjusting plate (25) has a second turntable (31) mounted on the outer bearing. The second turntable (31) has several second arc-shaped grooves (32) at equal angles. The second slide (28) has a second guide rod (33) that passes through the second translation groove (26) and the second arc-shaped groove (32).

7. The high-frequency welded pipe forming device according to claim 6, characterized in that, A second motor (34) is installed at the center of the second turntable (31), and the output end of the second motor (34) is fixedly connected to the center of the first adjustment plate (25).

8. The high-frequency welded pipe forming device according to claim 7, characterized in that, The outer limiting guide wheel (13) and the outer scraper (14) are both in contact with the outer wall of the high-frequency welded pipe, and the bottom arc of the outer scraper (14) is the same as the arc of the outer wall of the high-frequency welded pipe.

9. A high-frequency welded pipe forming apparatus according to claim 8, characterized in that, The inner limiting guide wheel (29) and the inner scraper (30) are both in contact with the inner wall of the high-frequency welded pipe, and the top curvature of the inner scraper (30) is the same as the curvature of the inner wall of the high-frequency welded pipe.

10. The working method of the high-frequency welded pipe forming device according to claim 9, characterized in that, The specific operational steps of this working method are as follows: Step 1: The strip steel is uncoiled by the uncoiler, leveled by the leveler, and connected into a continuous strip by the shearing and welding machine. It then enters the forming machine and is gradually rolled into a circle, so that the edge forms a "V" shaped opening to be welded. Subsequently, the high-frequency welding device heats the edge to a molten state, and the extrusion rollers extrude and complete the welding, forming a welded pipe with internal and external burrs. Step 2: Start the first motor (18) to drive the rotating gear (19), and achieve the rotation of the rotating ring (15) through the meshing external gear (20). The first arc groove (16) on the rotating ring (15) will push the first guide rod (17), causing the first slide (12) to move radially along the first guide rail (11). At this time, the outer limit guide wheel (13) and the outer scraper (14) on the first slide (12) are in contact with the outer wall of the high-frequency welded pipe, and the outer scraper (14) is located at the weld scar on the outside of the high-frequency welded pipe, so that the outer burr removal mechanism (2) and the high-frequency welded pipe are connected. The high-frequency welded pipe is installed in a co-centric manner. The second motor (34) is started to rotate the second turntable (31). The second arc groove (32) on the second turntable (31) pushes the second guide rod (33), which drives the second slide (28) to move radially along the first guide rail (11). At this time, the inner limit guide wheel (29) and the inner scraper (30) on the second slide (28) are in contact with the inner wall of the high-frequency welded pipe, and the inner scraper (30) is located at the weld scar on the inner side of the high-frequency welded pipe, so that the inner burr removal mechanism (4) and the high-frequency welded pipe are installed in a co-centric manner. Step 3: As the high-frequency welded pipe moves, the weld metal protrusion at the weld scar is scraped off by the outer scraper (14) and the inner scraper (30). When the high-frequency welded pipe moves, it shakes. At this time, the outer limit guide wheel (13) and the outer scraper (14) are close to the outer wall of the high-frequency welded pipe. Under the action of the first spring (9), the entire adjusting ring (7) floats radially relative to the first ring cover (6), thereby realizing the dynamic tracking of the center of the welded pipe by the outer limit guide wheel (13) and the outer scraper (14). The inner limit guide wheel (29) and the inner scraper (30) are close to the inner wall of the high-frequency welded pipe. Under the action of the second spring (24), the first adjusting plate (25) and the second ring cover (22) float as a whole relative to the support plate (21). The outer limit guide wheel (13) and the inner scraper (30) always follow the instantaneous center of the welded pipe. Step 4: After deburring, the high-frequency welded pipe enters the sizing machine, where its outer diameter and roundness are precisely calibrated. The weld performance is improved by an online heat treatment device, and then it is cooled by a cooling device. Subsequently, the straightening machine corrects the straightness. Step 5: The finished high-frequency welded pipes undergo online quality inspection using non-destructive testing equipment. Finally, qualified high-frequency welded pipes are cut to the set length by a slitting machine, completing the production process.

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