Welded pipe straightening machine

Abstract

The invention belongs to the technical field of welded pipe straightening, and particularly discloses a welded pipe straightening machine which comprises a fixed supporting body, a pipe feeding mechanism, a straightening mechanism, a self-collecting weld beading removing device and a residual stress eliminating device. Different pipe diameters are accurately matched in a self-adaptive adjustment mode, and precise straightening of the welded pipe, efficient removal of surface weld beading and oxide skin and homogenization elimination of residual stress are synchronously completed in the continuous feeding process; seamless connection of multiple procedures is achieved through the integrated design, the size precision, the surface quality and the fatigue performance of the welded pipe are remarkably improved, the subsequent polishing link is thoroughly omitted, and an efficient, reliable and complete solution is provided for production of the high-quality welded pipe.

Description

Technical Field

[0001] This invention belongs to the field of welded pipe straightening technology, specifically referring to a welded pipe straightening machine. Background Technology

[0002] Workers have discovered in their steel pipe production practice that welded steel pipes (welded pipes) are prone to bending, deformation, surface weld beads, and oxide scale during production, severely affecting their dimensional accuracy, surface quality, and performance. Traditional post-processing of welded pipes typically involves multiple independent steps such as straightening, deburring, polishing, and stress relief, requiring various equipment to complete each process. This results in low production efficiency, large footprint, and the risk of secondary damage from repeated clamping. Especially during straightening, while conventional roller straightening can correct deformation, it often introduces residual stress, reducing the fatigue strength and durability of the welded pipe. Removing surface weld beads and oxide scale often relies on additional grinding or pickling, which not only increases the number of steps but also pollutes the environment. Therefore, there is an urgent need to develop a highly integrated, adaptive, intelligent equipment capable of simultaneously completing straightening, deburring, and stress relief for different pipe diameters, in order to improve the quality and efficiency of welded pipe processing. Summary of the Invention

[0003] To address the above issues and overcome the shortcomings of existing technologies, this invention provides a welded pipe straightening machine. This machine precisely matches different pipe diameters through adaptive adjustment, simultaneously completing precise straightening of the welded pipe, efficient removal of surface weld beads and oxide scale, and homogenization and elimination of residual stress during continuous feeding. The integrated design achieves seamless connection between multiple processes, significantly improving the dimensional accuracy, surface quality, and fatigue performance of the welded pipe, completely eliminating the need for subsequent polishing, and providing an efficient and reliable complete solution for high-quality welded pipe production.

[0004] The technical solution adopted by this invention is as follows: This invention provides a welded pipe straightening machine, including a fixed support, a pipe feeding mechanism, a straightening mechanism, a self-collecting weld bead removal device, and a residual stress relief device. The pipe feeding mechanism is disposed on the fixed support, the straightening mechanism is disposed on the fixed support, the self-collecting weld bead removal device is disposed on the fixed support, the straightening mechanism is disposed between the pipe feeding mechanism and the self-collecting weld bead removal device, the residual stress relief device is disposed on the fixed support, and the self-collecting weld bead removal device is disposed between the straightening mechanism and the residual stress relief device. The self-collecting weld bead removal device includes a fixed frame, a hydraulic rod, a fixed frame, a removal roller, and a removal motor. The fixed frame is disposed on the fixed support, the hydraulic rod is disposed on the fixed frame, the fixed frame is connected to the movable end of the hydraulic rod, the removal roller is rotatably disposed on the fixed frame, and the removal motor is disposed on the fixed frame. The output end of the removal motor is connected to the removal roller.

[0005] Furthermore, the cleaning roller includes a roller body, a spiral groove, and a cleaning blade. The roller body is rotatably mounted on a fixed frame, the spiral groove is located on the outer circumferential wall of the roller body, and the cleaning blade is located in the spiral groove. The cleaning motor rotates to drive the roller body to rotate, and the rotation of the roller body drives the cleaning blade to rotate. The rotation of the cleaning blade can scrape off the weld beads on the welded pipe and also scrape off the oxide scale on the surface of the welded pipe, effectively reducing the surface roughness of the welded pipe and eliminating the need for subsequent polishing processes. During scraping, foreign objects such as weld beads, slag, and oxide scale on the surface of the welded pipe can be rolled into the spiral groove and then discharged with the rotation of the roller body. The spiral groove is aligned with the feed direction of the welded pipe, and the rotation can also generate axial thrust to assist in pipe feeding and reduce the load on the pipe feeding mechanism.

[0006] Preferably, the straightening mechanism includes a fixed plate, a roller straightening component, and a straightening drive component. The fixed plate is disposed on a fixed support, the roller straightening component is disposed on the fixed plate, and the straightening drive component is disposed on the roller straightening component and the fixed plate. The straightening mechanism has two sets.

[0007] Furthermore, the roller straightening component includes a fixed frame, a radial adjusting block, a connecting column, a fixed plate frame, a roller straightening wheel, and a radial adjusting screw. The fixed frame is mounted on a fixed plate, the radial adjusting block is engaged and slidably mounted in the fixed frame, one end of the connecting column passes through the fixed frame and is connected to the radial adjusting block, the fixed plate frame is connected to the other end of the connecting column, the roller straightening wheel is rotatably mounted on the fixed plate frame, and the radial adjusting screw passes through the fixed frame and is rotatably connected to the radial adjusting block. The radial adjusting screw is threadedly connected to the fixed frame. The roller straightening component is provided in three sets, and the angle between two adjacent sets of roller straightening components is 120 degrees.

[0008] The straightening drive component includes a straightening drive gear, a straightening driven gear, a straightening transmission toothed belt, a toothed belt tensioner, a straightening motor mounting plate, and a straightening motor. The straightening drive gear is connected to the roller straightening wheel, and the straightening driven gear is also connected to the roller straightening wheel. The straightening transmission toothed belt is sleeved on the straightening drive gear and the straightening driven gear. The inner sidewall of the straightening transmission toothed belt has tooth grooves, and the straightening drive gear and the straightening driven gear are respectively meshed with the tooth grooves. The toothed belt tensioner is mounted on the mounting plate and contacts the straightening transmission toothed belt. The mounting plate has a moving groove, and the straightening motor mounting plate passes through the moving groove and is mounted on the radial adjustment block. The straightening motor is mounted on the straightening motor mounting plate, and the output end of the straightening motor is connected to the straightening drive gear.

[0009] Furthermore, the toothed belt tensioning component includes a toothed belt tensioning wheel, a tensioning wheel fixing frame, a tensioning screw, and a limiting slide bar. The fixing plate is provided with a protruding plate, the tensioning screw is disposed through the fixing plate, the tensioning screw is threadedly connected to the fixing plate, the tensioning wheel fixing frame is rotatably connected to the tensioning screw, the limiting slide bar passes through the protruding plate and is connected to the tensioning wheel fixing frame, the limiting slide bar is engaged and slidably disposed on the protruding plate, the toothed belt tensioning wheel is rotatably disposed in the tensioning wheel fixing frame, and the toothed belt tensioning wheel contacts the straightening transmission toothed belt.

[0010] As a further preferred embodiment of the present invention, the pipe feeding mechanism includes a fixed mounting plate, a fixed pipe feeding component, and a movable pipe feeding component. The fixed mounting plate is disposed on a fixed support body, the fixed pipe feeding component is disposed on the fixed mounting plate, the movable pipe feeding component is disposed on the fixed mounting plate, and the movable pipe feeding component is disposed above the fixed pipe feeding component.

[0011] Further, the movable pipe feeding component includes a spacing adjustment component, an upper pipe feeding roller, and an upper pipe feeding motor. The spacing adjustment component is mounted on a fixed mounting plate, the upper pipe feeding roller is rotatably mounted on the spacing adjustment component, and the upper pipe feeding motor is mounted on the spacing adjustment component. The spacing adjustment component includes an adjustment frame, a load-bearing adjustment block, a spacing adjustment screw, and a spacing adjustment limiting slide rod. The adjustment frame is mounted on the fixed mounting plate, the spacing adjustment screw passes through the fixed mounting plate and is rotatably mounted in the adjustment frame, the spacing adjustment limiting slide rod passes through the fixed mounting plate and is mounted in the adjustment frame, the load-bearing adjustment block is engaged and slidably mounted in the adjustment frame, the load-bearing adjustment block is sleeved on the spacing adjustment screw and the spacing adjustment limiting slide rod, and the load-bearing adjustment block is threadedly connected to the spacing adjustment screw. The upper pipe feeding roller is rotatably mounted on the load-bearing adjustment block. The fixed mounting plate has a movable groove, and the load-bearing adjustment block has a movable bearing plate. The movable bearing plate passes through the movable groove and is connected to the load-bearing adjustment block. The upper pipe feeding motor is mounted on the movable bearing plate, and the output end of the upper pipe feeding motor is connected to the upper pipe feeding roller.

[0012] The fixed pipe feeding component includes a lower pipe feeding roller and a lower pipe feeding motor. The lower pipe feeding roller is rotatably mounted on a fixed mounting plate, and the lower pipe feeding motor is mounted on the fixed mounting plate. The output end of the lower pipe feeding motor is connected to the lower pipe feeding roller. The upper pipe feeding roller and the lower pipe feeding roller are respectively provided with anti-slip ridges.

[0013] Furthermore, the residual stress relief device includes a fixed support relief roller and a spring-loaded adaptive relief roller. The fixed support body is provided with a relief hole, and a relief cavity is provided at the relief hole. The fixed support relief roller is disposed in the relief cavity. The spring-loaded adaptive relief roller is disposed on the inner upper wall of the relief hole. The spring-loaded adaptive relief roller includes a spring, a guide telescopic column, a relief fixing frame, and an upper relief roller. The guide telescopic column is disposed on the inner upper wall of the relief hole, the relief fixing frame is disposed on the guide telescopic column, the spring is disposed between the inner upper wall of the relief hole and the relief fixing frame, and the spring is sleeved on the outer side of the guide telescopic column. The upper relief roller is rotatably disposed on the relief fixing frame. The residual stress relief device applies uniform and gentle pressure to the entire welded pipe surface. This pressure can induce small and uniform plastic flow in the surface layer and even deeper layers of metal, thereby effectively relaxing and homogenizing the harmful residual stress generated during the straightening process.

[0014] The beneficial effects achieved by the present invention using the above structure are as follows: 1. High integration and automation: It integrates straightening, deburring, oxide scale removal and residual stress relief functions into one unit. Multiple processes can be completed in one clamping, which greatly reduces intermediate links and equipment investment, improves production efficiency, and reduces the intensity of manual operation and the risk of secondary damage. 2. Precise and adjustable adaptive design: Through the cooperation of the spacing adjustment screw, radial adjustment screw and tension screw, it can quickly adapt to welded pipes of different diameters, ensuring precise matching of the upper / lower pipe feeding roller spacing, the pressing force of the roller straightening wheel and the tension of the transmission toothed belt, thus improving the equipment's versatility and straightening accuracy; 3. High-efficiency surface treatment capability: The cleaning roller is equipped with a spiral groove structure and cleaning blades, which effectively scrape off weld beads and oxide scale during rotation, significantly reducing roughness and eliminating the need for subsequent polishing; the spiral groove can also axially discharge the scraped material and generate an auxiliary thrust for pipe feeding, reducing the load on the pipe feeding mechanism; 4. Highly efficient elimination of residual stress: The elastic roller pressure stress elimination device applies uniform and gentle pressure to the surface of the welded pipe through the cooperation of the upper elimination roller and the fixed support elimination roller, which promotes the metal to produce a small amount of plastic flow, effectively homogenizes the residual stress generated by straightening, and improves the fatigue life and dimensional stability of the welded pipe. 5. Stable operation and easy maintenance: The straightening transmission system is driven by gear and toothed belt meshing, and the tensioning mechanism ensures smooth transmission; both the cleaning roller and the straightening wheel adopt a height-adjustable design, making maintenance and replacement convenient. The overall process is simple, with good repeatability, and is suitable for continuous production environments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a welded pipe straightening machine proposed in this invention; Figure 2 This is a left view of a welded pipe straightening machine proposed in this invention; Figure 3 This is a front view of a welded pipe straightening machine proposed in this invention; Figure 4 This is a top view of a welded pipe straightening machine proposed in this invention; Figure 5 This is a bottom view of a welded pipe straightening machine proposed in this invention; Figure 6 This is a schematic diagram of a self-collecting weld bead removal device. Figure 7 This is a schematic diagram of the back structure of the straightening mechanism; Figure 8 This is a schematic diagram of the straightening mechanism; Figure 9 This is a schematic diagram of the pipe delivery mechanism; Figure 10 This is a structural diagram of the fixed support. Figure 11 This is a cross-sectional schematic diagram of the fixed support.

[0016] The components include: 1. Fixed support body; 2. Pipe feeding mechanism; 3. Straightening mechanism; 4. Self-collecting weld bead removal device; 5. Residual stress relief device; 6. Fixing frame; 7. Hydraulic rod; 8. Fixing frame; 9. Removing roller; 10. Removing motor; 11. Roller body; 12. Spiral groove; 13. Removing blade; 14. Fixing plate; 15. Roller straightening component; 16. Straightening drive component; 17. Fixing frame; 18. Radial adjusting block; 19. Connecting column; 20. Fixing plate frame; 21. Straightening drive gear; 22. Straightening driven gear; 23. Straightening transmission toothed belt; 24. Toothed belt tensioner; 25. Straightening motor fixing plate; 26. Straightening motor; 27. Toothed groove; 28. Moving groove; 29. ​​Toothed belt tensioning wheel; 30. Tensioning wheel. 31. Fixed frame, 32. Tensioning screw, 33. Limiting slide bar, 34. Protruding plate, 35. Fixed mounting plate, 36. Fixed pipe feeding fitting, 37. Movable pipe feeding fitting, 38. Spacing adjustment component, 39. Upper pipe feeding roller, 40. Upper pipe feeding motor, 41. Adjusting frame, 42. Load-bearing adjusting block, 43. Spacing adjusting screw, 44. Spacing adjusting limiting slide bar, 45. Movable groove, 46. Lower pipe feeding roller, 47. Lower pipe feeding motor, 48. Anti-slip ridge, 49. Fixed support elimination roller, 50. Spring-adaptive elimination roller, 51. Elimination hole, 52. Elimination cavity, 53. Spring, 54. Guide telescopic column, 55. Elimination fixed frame, 56. Upper elimination roller, 57. Roller straightening wheel, 58. Radial adjusting screw.

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

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

[0019] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the present invention provides a welded pipe straightening machine, including a fixed support body 1, a pipe feeding mechanism 2, a straightening mechanism 3, a self-collecting weld bead removal device 4, and a residual stress relief device 5. The pipe feeding mechanism 2 is disposed on the fixed support body 1, the straightening mechanism 3 is disposed on the fixed support body 1, the self-collecting weld bead removal device 4 is disposed on the fixed support body 1, the straightening mechanism 3 is disposed between the pipe feeding mechanism 2 and the self-collecting weld bead removal device 4, the residual stress relief device 5 is disposed on the fixed support body 1, and the self-collecting weld bead removal device 4 is disposed between the straightening mechanism 3 and the residual stress relief device 5.

[0021] like Figure 1 , Figure 9As shown, the pipe feeding mechanism 2 includes a fixed mounting plate 34, a fixed pipe feeding component 35, and a movable pipe feeding component 36. The fixed mounting plate 34 is mounted on the fixed support body 1, the fixed pipe feeding component 35 is mounted on the fixed mounting plate 34, and the movable pipe feeding component 36 is mounted on the fixed mounting plate 34, positioned above the fixed pipe feeding component 35. The movable pipe feeding component 36 includes a spacing adjustment component 37, an upper pipe feeding roller 38, and an upper pipe feeding motor 39. The spacing adjustment component 37 is mounted on the fixed mounting plate 34, the upper pipe feeding roller 38 is rotatably mounted on the spacing adjustment component 37, and the upper pipe feeding motor 39 is mounted on the spacing adjustment component 37. The spacing adjustment component 37 includes an adjustment frame 40, a load-bearing adjustment block 41, a spacing adjustment screw 42, and a spacing adjustment limit slide bar 43. The adjustment frame 40 is mounted on the fixed mounting plate 34, the spacing adjustment screw 42 passes through the fixed mounting plate 34 and rotatably resides in the adjustment frame 40, and the spacing adjustment limit slide bar 43 passes through the fixed mounting plate 34 and is positioned above the fixed pipe feeding component 35. In the frame 40, the load-bearing adjusting block 41 is engaged and slidably disposed within the adjusting frame 40. The load-bearing adjusting block 41 is sleeved on the spacing adjusting screw 42 and the spacing adjusting limiting slide rod 43. The load-bearing adjusting block 41 is threadedly connected to the spacing adjusting screw 42. The upper feeding tube roller 38 is rotatably disposed on the load-bearing adjusting block 41. The fixed mounting plate 34 is provided with a movable groove 44. The load-bearing adjusting block 41 is provided with a movable bearing plate 45. The movable bearing plate 45 passes through the movable groove 44 and is connected to the load-bearing adjusting block 41. Block 41 is connected. The upper tube feeding motor 39 is mounted on the movable support plate 45. The output end of the upper tube feeding motor 39 is connected to the upper tube feeding roller 38. The fixed tube feeding component 35 includes a lower tube feeding roller 46 and a lower tube feeding motor 47. The lower tube feeding roller 46 is rotatably mounted on the fixed mounting plate 34. The lower tube feeding motor 47 is mounted on the fixed mounting plate 34. The output end of the lower tube feeding motor 47 is connected to the lower tube feeding roller 46. The upper tube feeding roller 38 and the lower tube feeding roller 46 are respectively provided with anti-slip ridges 48.

[0022] like Figure 1 , Figure 7 , Figure 8As shown, the straightening mechanism 3 includes a fixed plate 14, a roller straightening component 15, and a straightening drive component 16. The fixed plate 14 is mounted on the fixed support 1, the roller straightening component 15 is mounted on the fixed plate 14, and the straightening drive component 16 is mounted on both the roller straightening component 15 and the fixed plate 14. The straightening mechanism 3 has two sets. The roller straightening component 15 includes a fixed frame 17, a radial adjusting block 18, a connecting column 19, a fixed plate frame 20, a roller straightening wheel 57, and a radial adjusting screw 58. The fixed frame 17 is mounted on the fixed plate 14, and the radial adjusting block 18 is engaged and slidably mounted in the fixed frame 17. One end of the connecting column 19 passes through the fixed frame 17 and... The radial adjusting block 18 is connected, and the fixed plate frame 20 is connected to the other end of the connecting column 19. The roller straightening wheel 57 is rotatably mounted on the fixed plate frame 20. The radial adjusting screw 58 passes through the fixed frame 17 and is rotatably connected to the radial adjusting block 18. The radial adjusting screw 58 is threadedly connected to the fixed frame 17. The roller straightening component 15 is provided in three sets, and the angle between two adjacent sets of roller straightening components 15 is 120 degrees. The straightening drive component 16 includes a straightening drive gear 21, a straightening driven gear 22, a straightening transmission toothed belt 23, a toothed belt tensioner 24, a straightening motor fixing plate 25, and a straightening motor 26. The straightening drive gear 21 is connected to the roller straightening wheel 26. The roller straightening wheel 57 is connected to the straightening wheel 57. The straightening drive gear 22 is connected to the roller straightening wheel 57. The straightening drive gear 23 is sleeved on the straightening drive gear 21 and the straightening drive gear 22. The inner side wall of the straightening drive gear 23 is provided with tooth grooves 27. The straightening drive gear 21 and the straightening drive gear 22 are respectively meshed with the tooth grooves 27. The gear belt tensioner 24 is provided on the fixed plate 14 and contacts the straightening drive gear 23. The fixed plate 14 is provided with a moving groove 28. The straightening motor fixing plate 25 passes through the moving groove 28 and is provided on the radial adjusting block 18. The straightening motor 26 is provided on the straightening motor fixing plate 25. The output end is connected to the straightening drive gear 21; the toothed belt tensioning component 24 includes a toothed belt tensioning wheel 29, a tensioning wheel fixing frame 30, a tensioning screw 31, and a limiting slide bar 32. A protruding plate 33 is provided on the fixing plate 14. The tensioning screw 31 is provided through the fixing plate 14 and is threadedly connected to the fixing plate 14. The tensioning wheel fixing frame 30 is rotatably connected to the tensioning screw 31. The limiting slide bar 32 passes through the protruding plate 33 and is connected to the tensioning wheel fixing frame 30. The limiting slide bar 32 is engaged and slidably provided on the protruding plate 33. The toothed belt tensioning wheel 29 is rotatably provided in the tensioning wheel fixing frame 30 and contacts the straightening drive toothed belt 23.

[0023] like Figure 1 , Figure 6As shown, the self-collecting weld bead removal device 4 includes a fixed frame 6, a hydraulic rod 7, a fixed frame 8, a removal roller 9, and a removal motor 10. The fixed frame 6 is mounted on the fixed support 1, the hydraulic rod 7 is mounted on the fixed frame 6, the fixed frame 8 is connected to the movable end of the hydraulic rod 7, the removal roller 9 is rotatably mounted on the fixed frame 8, and the removal motor 10 is mounted on the fixed frame 8. The output end of the removal motor 10 is connected to the removal roller 9. The removal roller 9 includes a roller body 11, a spiral groove 12, and a removal blade 13. The roller body 11 is rotatably mounted on the fixed frame 8, the spiral groove 12 is located on the outer circumferential wall of the roller body 11, and the removal blade 13 is located on the spiral groove 12. In the spiral groove 12, the cleaning blade 13 is close to one inner sidewall of the spiral groove 12; the cleaning motor 10 rotates and drives the roller 11 to rotate, and the roller 11 rotates and drives the cleaning blade 13 to rotate. The rotation of the cleaning blade 13 can scrape off the weld beads on the welded pipe and also scrape off the oxide scale on the surface of the welded pipe, effectively reducing the surface roughness of the welded pipe and eliminating the need for subsequent polishing processes. The weld beads, slag, oxide scale and other foreign objects on the surface of the welded pipe can be rolled into the spiral groove 12 during scraping and then discharged with the rotation of the roller 11. The spiral groove 12 is consistent with the feed direction of the welded pipe, and can also generate axial thrust when rotating, which can assist in pipe feeding and reduce the load on the pipe feeding mechanism 2.

[0024] like Figure 1 , Figure 10 , Figure 11 As shown, the residual stress relief device 5 includes a fixed support relief roller 49 and a spring-loaded adaptive relief roller 50. The fixed support body 1 is provided with a relief hole 51, and a relief cavity 52 is provided at the relief hole 51. The fixed support relief roller 49 is located in the relief cavity 52. ​​The spring-loaded adaptive relief roller 50 is located on the inner upper wall of the relief hole 51. The spring-loaded adaptive relief roller 50 includes a spring 53, a guide telescopic column 54, a relief fixing frame 55, and an upper relief roller 56. The guide telescopic column 54 is located on the inner upper wall of the relief hole 51, the relief fixing frame 55 is located on the guide telescopic column 54, the spring 53 is located between the inner upper wall of the relief hole 51 and the relief fixing frame 55, and the spring 53 is sleeved on the outside of the guide telescopic column 54. The upper relief roller 56 is rotatably located on the relief fixing frame 55. The residual stress relief device 5 applies uniform and gentle pressure to the entire welded pipe surface. This pressure can cause the surface layer and even deeper metal to produce small and uniform plastic flow, thereby effectively relaxing and homogenizing the harmful residual stress generated during the straightening process.

[0025] In practical use, the device is adjusted according to the diameter of the pipe to be straightened. First, rotate the spacing adjustment screw 42. The rotation of the spacing adjustment screw 42 drives the load-bearing adjustment block 41 to rise and fall along the adjustment frame 40. The rise and fall of the load-bearing adjustment block 41 drives the upper feeding roller 38 to rise and fall, so that the distance between the upper feeding roller 38 and the lower feeding roller 46 is the same as the diameter of the pipe to be straightened. Next, rotate the radial adjustment screw 58. The rotation of the radial adjustment screw 58 drives the radial adjustment block 18 to rise and fall along the fixed frame 17. The rise and fall of the radial adjustment block 18 drives the connecting column 19 to rise and fall. The rise and fall of the connecting column 19 drives the fixed plate frame 20 to rise and fall. The rise and fall of the fixed plate frame 20 drives the roller straightening rollers 57 to rise and fall, so that each roller straightening roller 57 presses down on the pipe to be straightened. The adjustment is then complete. Then, rotate the tension screw 31. The rotation of the tension screw 31 drives the tension wheel fixing frame 30 to move. The movement of the tension wheel fixing frame 30 drives the toothed belt tensioning wheel 29 to move closer to or away from the straightening transmission toothed belt 23, so that the straightening transmission toothed belt 23 is tensioned and firmly meshed with the straightening drive gear 21 and the straightening driven gear 22. Then, start the hydraulic rod 7. The extension and retraction of the hydraulic rod 7 drives the fixing frame 8 to rise and fall. The rise and fall of the fixing frame 8 drives the cleaning roller 9 to rise and fall, so that the cleaning roller 9 contacts the welded pipe to be straightened. Place the welded pipe to be straightened on the fixed support body 1 and place it between the upper pipe feeding roller 38 and the lower pipe feeding roller 46. Start the lower pipe feeding motor 47 and the upper pipe feeding motor 39. The rotation of the lower pipe feeding motor 47 drives the lower pipe feeding roller 46 to rotate, and the rotation of the upper pipe feeding motor 39 drives the upper pipe feeding roller 38 to rotate. The lower tube feeding roller 46 rotates, driving the welded pipe to feed gradually between the roller straightening wheels 57. The straightening motor 26 is started, driving the straightening drive gear 21, which in turn drives the straightening transmission belt 23, which in turn drives the straightening driven gear 22, thereby rotating the roller straightening wheels 57 to straighten the welded pipe. The cleaning motor 10 is then started, driving the cleaning roller 9, which in turn drives the cleaning blade 13. The cleaning blade 13 scrapes away weld beads and oxide scale from the welded pipe surface, effectively reducing surface roughness and eliminating the need for subsequent polishing. Foreign objects can be drawn into the spiral groove 12 during scraping and then discharged with the rotation of the roller 11. The spiral groove 12 is consistent with the feeding direction of the welded pipe and can also generate axial thrust during rotation, which assists in pipe feeding and reduces the load on the pipe feeding mechanism 2. After straightening and deburring, the welded pipe moves to the residual stress relief device 5. The fixed support relief roller 49 performs support-type roller pressing on the welded pipe, and the upper relief roller 56 performs downward elastic roller pressing on the welded pipe, applying uniform and gentle pressure to the entire surface of the welded pipe. This pressure can promote the generation of small and uniform plastic flow in the surface layer and even deeper layers of metal, thereby effectively relaxing and homogenizing the harmful residual stress generated during the straightening process, and further enhancing the service life of the welded pipe. The above is the specific working process of the present invention. This step can be repeated next time it is used.

[0026] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the foregoing and its equivalents.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A welded pipe straightening machine, characterized in that: The device includes a fixed support (1), a pipe feeding mechanism (2), a straightening mechanism (3), a self-collecting weld bead removal device (4), and a residual stress relief device (5). The pipe feeding mechanism (2) is located on the fixed support (1), the straightening mechanism (3) is located on the fixed support (1), the self-collecting weld bead removal device (4) is located on the fixed support (1), the straightening mechanism (3) is located between the pipe feeding mechanism (2) and the self-collecting weld bead removal device (4), the residual stress relief device (5) is located on the fixed support (1), and the self-collecting weld bead removal device (4) is located between the pipe feeding mechanism (2) and the self-collecting weld bead removal device (4). Between the straightening mechanism (3) and the residual stress relief device (5); the self-collecting weld bead removal device (4) includes a fixed frame (6), a hydraulic rod (7), a fixed frame (8), a removal roller (9) and a removal motor (10). The fixed frame (6) is mounted on the fixed support (1), the hydraulic rod (7) is mounted on the fixed frame (6), the fixed frame (8) is connected to the movable end of the hydraulic rod (7), the removal roller (9) is rotatably mounted on the fixed frame (8), the removal motor (10) is mounted on the fixed frame (8), and the output end of the removal motor (10) is connected to the removal roller (9).

2. The welded pipe straightening machine according to claim 1, characterized in that: The cleaning roller (9) includes a roller body (11), a spiral groove (12) and a cleaning blade (13). The roller body (11) is rotatably mounted on a fixed frame (8). The spiral groove (12) is located on the outer circumferential wall of the roller body (11). The cleaning blade (13) is located in the spiral groove (12).

3. The welded pipe straightening machine according to claim 2, characterized in that: The straightening mechanism (3) includes a fixed plate (14), a roller straightening component (15), and a straightening drive component (16). The fixed plate (14) is mounted on the fixed support (1), the roller straightening component (15) is mounted on the fixed plate (14), and the straightening drive component (16) is mounted on the roller straightening component (15) and the fixed plate (14). The straightening mechanism (3) has two sets.

4. A welded pipe straightening machine according to claim 3, characterized in that: The roller straightening component (15) includes a fixed frame (17), a radial adjusting block (18), a connecting column (19), a fixed plate frame (20), a roller straightening wheel (57), and a radial adjusting screw (58). The fixed frame (17) is mounted on a fixed plate (14). The radial adjusting block (18) is engaged and slidably mounted in the fixed frame (17). One end of the connecting column (19) passes through the fixed frame (17) and connects to the radial adjusting block (18). The fixed plate frame (20) is connected to the other end of the connecting column (19). The roller straightening wheel (57) is rotatably mounted on the fixed plate frame (20). The radial adjusting screw (58) passes through the fixed frame (17) and is rotatably connected to the radial adjusting block (18). The radial adjusting screw (58) is threadedly connected to the fixed frame (17). The roller straightening component (15) is provided in three sets, and the angle between two adjacent sets of roller straightening components (15) is 120 degrees.

5. A welded pipe straightening machine according to claim 4, characterized in that: The straightening drive component (16) includes a straightening drive gear (21), a straightening driven gear (22), a straightening transmission toothed belt (23), a toothed belt tensioner (24), a straightening motor fixing plate (25), and a straightening motor (26). The straightening drive gear (21) is connected to the roller straightening wheel (57), and the straightening driven gear (22) is connected to the roller straightening wheel (57). The straightening transmission toothed belt (23) is sleeved on the straightening drive gear (21) and the straightening driven gear (22). The inner side wall of the straightening transmission toothed belt (23) is provided with tooth grooves (27). The straightening drive gear (21) and the straightening driven gear (22) are respectively meshed with the tooth groove (27). The toothed belt tensioner (24) is provided on the fixed plate (14). The toothed belt tensioner (24) is in contact with the straightening transmission toothed belt (23). The fixed plate (14) is provided with a moving groove (28). The straightening motor fixed plate (25) passes through the moving groove (28) and is provided on the radial adjustment block (18). The straightening motor (26) is provided on the straightening motor fixed plate (25). The output end of the straightening motor (26) is connected to the straightening drive gear (21).

6. A welded pipe straightening machine according to claim 5, characterized in that: The toothed belt tensioning component (24) includes a toothed belt tensioning wheel (29), a tensioning wheel fixing frame (30), a tensioning screw (31), and a limiting slide bar (32). A protruding plate (33) is provided on the fixing plate (14). The tensioning screw (31) is disposed through the fixing plate (14) and threadedly connected to the fixing plate (14). The tensioning wheel fixing frame (30) is rotatably connected to the tensioning screw (31). The limiting slide bar (32) passes through the protruding plate (33) and is connected to the tensioning wheel fixing frame (30). The limiting slide bar (32) is engaged and slidably disposed on the protruding plate (33). The toothed belt tensioning wheel (29) is rotatably disposed in the tensioning wheel fixing frame (30). The toothed belt tensioning wheel (29) is in contact with the straightening transmission toothed belt (23).

7. A welded pipe straightening machine according to claim 6, characterized in that: The pipe feeding mechanism (2) includes a fixed mounting plate (34), a fixed pipe feeding component (35), and a movable pipe feeding component (36). The fixed mounting plate (34) is mounted on the fixed support (1), the fixed pipe feeding component (35) is mounted on the fixed mounting plate (34), and the movable pipe feeding component (36) is mounted on the fixed mounting plate (34) and is located above the fixed pipe feeding component (35).

8. A welded pipe straightening machine according to claim 7, characterized in that: The movable tube feeding component (36) includes a spacing adjustment component (37), an upper tube feeding roller (38), and an upper tube feeding motor (39). The spacing adjustment component (37) is mounted on a fixed mounting plate (34), the upper tube feeding roller (38) is rotatably mounted on the spacing adjustment component (37), and the upper tube feeding motor (39) is mounted on the spacing adjustment component (37). The spacing adjustment component (37) includes an adjustment frame (40), a load-bearing adjustment block (41), a spacing adjustment screw (42), and a spacing adjustment limit slide (43). The adjustment frame (40) is mounted on a fixed mounting plate (34), the spacing adjustment screw (42) passes through the fixed mounting plate (34) and is rotatably mounted in the adjustment frame (40), and the spacing adjustment limit slide (43) passes through the fixed mounting plate (34) and is mounted in the adjustment frame (40). In the section frame (40), the load-bearing adjustment block (41) is engaged and slidably disposed in the adjustment frame (40). The load-bearing adjustment block (41) is sleeved on the spacing adjustment screw (42) and the spacing adjustment limit slide (43). The load-bearing adjustment block (41) is threadedly connected to the spacing adjustment screw (42). The upper feeding tube roller (38) is rotatably disposed on the load-bearing adjustment block (41). The fixed mounting plate (34) is provided with a movable groove (44). The load-bearing adjustment block (41) is provided with a movable bearing plate (45). The movable bearing plate (45) passes through the movable groove (44) and is connected to the load-bearing adjustment block (41). The upper feeding tube motor (39) is disposed on the movable bearing plate (45). The output end of the upper feeding tube motor (39) is connected to the upper feeding tube roller (38).

9. A welded pipe straightening machine according to claim 8, characterized in that: The fixed pipe feeding component (35) includes a lower pipe feeding roller (46) and a lower pipe feeding motor (47). The lower pipe feeding roller (46) is rotatably mounted on the fixed mounting plate (34), and the lower pipe feeding motor (47) is mounted on the fixed mounting plate (34). The output end of the lower pipe feeding motor (47) is connected to the lower pipe feeding roller (46). The upper pipe feeding roller (38) and the lower pipe feeding roller (46) are respectively provided with anti-slip ridges (48).

10. A welded pipe straightening machine according to claim 9, characterized in that: The residual stress relief device (5) includes a fixed support relief roller (49) and a spring-loaded adaptive relief roller (50). The fixed support body (1) is provided with a relief hole (51), and a relief cavity (52) is provided at the relief hole (51). The fixed support relief roller (49) is located in the relief cavity (52), and the spring-loaded adaptive relief roller (50) is located on the upper inner wall of the relief hole (51). The spring-loaded adaptive relief roller (50) includes a spring (53) and a guide. The guide telescopic column (54), the elimination fixing frame (55), and the upper elimination roller (56) are provided. The guide telescopic column (54) is located on the inner upper wall of the elimination hole (51). The elimination fixing frame (55) is located on the guide telescopic column (54). The spring (53) is located between the inner upper wall of the elimination hole (51) and the elimination fixing frame (55). The spring (53) is sleeved on the outer side of the guide telescopic column (54). The upper elimination roller (56) is rotatably located on the elimination fixing frame (55).

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