A high-precision butt welding machine for stainless steel pipes

Abstract

This invention belongs to the field of stainless steel pipe butt welding technology, specifically a high-precision stainless steel pipe butt welding machine including a support plate. A positive and negative threaded screw is rotatably connected to the upper side of the support plate, and a clamping plate is threaded to the outer side of the positive and negative threaded screw. A fixing ring is fixedly connected to the outer side of the support plate, and a first motor is fixedly connected to the outer side of the fixing ring. A gear is fixedly connected to the output end of the first motor. That is, after the pipe joint is placed in alignment with the laser welding assembly, it is clamped and fixed by the clamping plate. The rotation of the laser welding assembly eliminates the need for the pipe to rotate, thus preventing the welding position from shifting. By providing sufficient length for the wiring on the outer side of the laser welding assembly, the wiring can rotate synchronously with the laser welding assembly, thus not restricting the rotation of the laser welding assembly, making the welding process more stable and improving the stability of the device.

Description

Technical Field

[0001] This invention relates to the field of stainless steel pipe butt welding technology, specifically a high-precision stainless steel pipe butt welding machine. Background Technology

[0002] Stainless steel pipe is a hollow, long, round steel material, mainly used in industrial pipelines for petroleum, chemical, medical, food, light industry, and machinery, as well as mechanical structural components.

[0003] Chinese patent application CN115922225A discloses a high-precision butt welding positioning device for stainless steel pipes based on self-centering. It points out that most existing processing methods involve operators manually limiting the position of the stainless steel pipe, followed by adjusting the welding device or the pipe's position. However, in actual use, rotating two stainless steel pipes that are not fully welded can easily cause displacement at the joint due to vibrations and operator errors. This necessitates interrupting the welding process after each adjustment to reposition and align the pipes, impacting production cycle time. Therefore, a high-precision butt welding machine for stainless steel pipes is proposed to address these issues. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: A high-precision butt welding machine for stainless steel pipes according to the present invention includes a support plate, a positive and negative threaded screw is rotatably connected to the upper side of the support plate, a clamping plate is threaded to the outer side of the positive and negative threaded screw, a fixing ring is fixedly connected to the outer side of the support plate, a first motor is fixedly connected to the outer side of the fixing ring, a gear is fixedly connected to the output end of the first motor, a first gear ring is meshed on the outer side of the gear, retaining rings are fixedly connected to the two side planes of the first gear ring, the retaining rings and the fixing ring are slidably connected, and a laser welding component is provided on the inner side of the first gear ring;

[0006] Before using the specific embodiments of this invention, after pipes of different sizes are joined, their joints are clamped by clamping plates, aligning the center of the pipe with the center of the fixing ring. Since pipes of different sizes have different diameters, the distance between the outer wall of the pipe and the laser welding assembly varies. Therefore, it is necessary to ensure that the laser welding assembly is a laser welder with an integrated visual positioning system, laser rangefinder, motor-driven lens, and closed-loop control algorithm. This allows the laser welding assembly to adjust its welding position according to the varying distances between the outer wall of the pipe and the assembly, ensuring that it can weld the joints of pipes of different sizes. Before welding, ensure that the wiring on the outside of the laser welding assembly has sufficient length for one full rotation, and fix the remaining length of the wiring. This allows the wiring to rotate synchronously with the laser welding assembly, ensuring sufficient length for one full rotation. After the laser welding assembly rotates one full rotation clockwise, reverse the laser welding assembly to return it to its original position. Because the laser welding assembly only... After rotating clockwise or counterclockwise one full turn, the line will return to its initial "exactly one turn" state, preventing it from winding around the outside of the steel pipe. This ensures that the clamps, as shown in the diagram, have an arc-shaped surface on their closest sides. The openings of the two stainless steel pipes are joined together and passed through the inner side of the fixing ring. Rotating the positive and negative threaded screws moves the clamps. Because the two clamps are located on opposite sides of the positive and negative threaded screws, they move closer together, clamping and fixing the stainless steel pipes. The arc-shaped surfaces of the two clamps guide the pipes, facilitating centered positioning. At this point, ensure the weld joints of the two stainless steel pipes are aligned with the laser welding assembly. Then, activate the laser welding assembly to melt and weld the pipes together. Simultaneously, the first motor drives the gear to rotate, which in turn drives the first gear ring to rotate. A retaining ring engages with the inner side of the fixing ring, restricting the rotation of the first gear ring and allowing it to drive the laser welding assembly inside to rotate stably, thus fully welding the pipe joint.

[0007] In other words, after placing the pipe joint in alignment with the laser welding assembly, it is clamped and fixed by the clamps. The rotation of the laser welding assembly eliminates the need for the pipe to rotate, thus preventing the welding position of the pipe from shifting. By providing sufficient length for the wiring on the outside of the laser welding assembly, the wiring can rotate synchronously with the laser welding assembly, thereby not restricting the rotation of the laser welding assembly, making the welding of the device more stable and improving the stability of the device.

[0008] Preferably, a third motor is fixedly connected to the inner side of the support plate, a movable plate is fixedly connected to the output end of the third motor, a fixed plate is slidably connected to the outer side of the support plate, a second motor is fixedly connected to one end of the fixed plate, an adjusting screw is fixedly connected to the output end of the second motor, the adjusting screw is threadedly connected to the support plate, a roller is rotatably connected to the lower side of the support plate, and a fixed block is fixedly connected to the outer side of the fixed plate. The movable plate and the fixed block are used in conjunction.

[0009] Before using the specific embodiments of the present invention, ensure that after the adjusting screw drives the support plate to the maximum position inside the fixed plate, the distance between the fixed block and the fixed ring is the same as the distance between the fixed ring and the movable plate. When using the embodiments of the present invention, first drive the movable plate to rotate through the third motor, so that the movable plate rotates to the upper end and lower, and directly put the two stainless steel tubes on the outside of the support rod and stick them to each other, with one end of one stainless steel tube sticking to one side of the fixed block. Since the two stainless steel tubes are connected and placed between the fixed block and the movable plate, drive the adjusting screw to rotate through the second motor, and drive the support plate to move through the adjusting screw, so that the support plate drives the movable plate to approach the fixed block, thereby clamping and fixing the two ends of the two stainless steel tubes through the movable plate and the fixed block.

[0010] In other words, when fixing two stainless steel tubes of the same length, whose length after docking is equal to the distance between the movable plate and the fixed block, the third motor first drives the movable plate to rotate, so that the movable plate rotates to the upper end and lower, and the two stainless steel tubes are directly sleeved on the outside of the support rod and pressed tightly against each other, with one end of one stainless steel tube pressed against one side of the fixed block. The fixed block, in conjunction with the movable plate, presses the two ends of the two docked stainless steel tubes that are far apart, so that the aligned welding point of the stainless steel tubes is easy to align with the laser welding assembly, so as to facilitate subsequent welding. The fixed block, in conjunction with the movable plate, presses the two ends of the two docked stainless steel tubes that are far apart, and then the clamping plate further clamps and fixes the stainless steel tubes, making the fixation of the stainless steel tubes more stable, and further improving the convenience of centering alignment and the stability of clamping and fixing of the device.

[0011] Preferably, a hydraulic cylinder is fixedly connected to the outer side of the fixed block, a movable block is fixedly connected to the output end of the hydraulic cylinder, a T-slot is formed on the inner side of the movable block, a T-block is slidably connected to the inner side of the T-slot, a support rod is fixedly connected to one end of the T-block, a circular plate is fixedly connected to the outer side of the support rod, a sliding groove is formed on the surface of the fixed block, the sliding groove and the support rod are slidably connected, and the circular plate and the fixed block are used in conjunction.

[0012] Before using any specific embodiment of the present invention, ensure that the active block is as follows: Figure 7 and Figure 8The design incorporates an approximately elliptical irregular plate connected to multiple triangular plates on its outer side. The T-slots on the inner side of the movable block are designed to tilt outwards from one end, allowing the T-blocks to move vertically while confined to a fixed position. This ensures the T-slots push the T-blocks away from each other. The circular plates on both sides of the fixed block are tightly fitted to the planes on both sides of the fixed block. The support rods are made of a material with a melting point higher than that of stainless steel tubing, and the distance between multiple support rods is less than the inner diameter of the stainless steel tubing. Furthermore, the length of each support rod is greater than that of a single stainless steel tubing. In the embodiment of this invention, after the stainless steel pipe passes through the inner side of the fixing ring, the support rod can be inserted into the inner side of the two stainless steel pipes. After the clamping plate, the fixing block and the movable plate clamp and fix the stainless steel pipe, the movable block can be moved by the hydraulic cylinder. Because the movable block has multiple inclined surfaces on the outside and the T-slot is set on the inner side of the inclined surface, the T-slot is inclined. After the movable block moves, the T-slot will push the T-block away from each other, so that the T-block drives the support rod to expand outward, so that the support rod can be close to the inner wall of the stainless steel pipe.

[0013] In other words, when stainless steel pipes are joined, because the distance between multiple support rods is less than the inner diameter of the stainless steel pipes, and the length of the support rods is greater than the length of a single stainless steel pipe, multiple support rods can be inserted into the inner sides of two stainless steel pipes. The support rods expand to simultaneously press against the inner walls of both stainless steel pipes, thus further supporting and aligning them. This makes the fixing and alignment of the stainless steel pipes more stable, resulting in more stable subsequent welding. After welding, by moving the support plate, the movable plate is moved away from the stainless steel pipes. Then, a third motor drives the movable plate to rotate, causing the upper part of the movable plate to rotate away from the stainless steel pipes. At this point, the welded stainless steel pipe is pulled to separate from the support rods and can be removed, further improving the welding stability of the device.

[0014] Preferably, the support rod has a guide groove on its inner side, the movable plate has an installation groove on its surface, and a guide rod is threadedly connected to the inner side of the installation groove. The guide rod and the guide groove are used in conjunction.

[0015] Before using the specific embodiments of the present invention, ensure that the inclined surface inside the guide groove and the tip of the guide rod are both conical. When using the embodiments of the present invention, according to the inner wall size of the stainless steel tube, screw the guide rod into the inner side of the mounting groove at different positions. After the support rod supports and fixes the inner wall of the stainless steel tube, the support rod is tightly restricted by the stainless steel tube, so that when one end of the movable plate is close to the fixed block, the movable plate drives the guide rod to move to the inner side of the guide groove.

[0016] In other words, after the support rod is tightly attached to the inner wall of the stainless steel pipe, a guide rod can be inserted into the guide groove to mechanically limit the end of the support rod away from the fixed block, preventing the support rod from retracting after supporting the inner wall of the stainless steel pipe. This makes the support rod support the inner wall of the stainless steel pipe more stable and improves the stability of the device.

[0017] Preferably, a groove is formed on the inner side of the support rod, and a pulley is slidably connected to the inner side of the groove;

[0018] Before using the specific embodiments of the present invention, ensure that the pulley is made of a material with a melting point higher than that of the stainless steel tube. When using the embodiments of the present invention, the stainless steel tube can be directly sleeved on the outside of the support rod. The stainless steel tube is supported by the support rods moving away from each other. Then, the stainless steel tube is moved by moving the movable plate, so that the stainless steel tube rubs against the pulley when it moves, causing the pulley to rotate.

[0019] In other words, when connecting stainless steel pipes, the pipes can be first supported and fixed using support rods, making them easy to align without requiring additional manual lifting. As the movable plate moves, pulleys support the pipes before the support rods, and the rotation of the pulleys facilitates the sliding of the pipes. This allows the movable plate to work with the fixing blocks to center and position the pipes. Finally, clamping plates hold and fix the pipes, ensuring they are properly aligned. No manual intervention is needed to maintain a fixed height, improving the ease of use of the device.

[0020] Preferably, a second toothed ring is fixedly connected to the outer side of the positive and negative threaded screw, and a toothed plate meshes with the outer side of the second toothed ring; the toothed plate and the support plate are slidably connected.

[0021] When used in the embodiments of the present invention, after the support rod supports and fixes the inner wall of the stainless steel tube, it can push the toothed plate to move, so that the toothed plate drives multiple second toothed rings to rotate synchronously, and the second toothed rings drive multiple positive and negative thread screws to rotate synchronously.

[0022] In other words, when it is necessary to rotate the positive and negative threaded screws, the two positive and negative threaded screws can be rotated simply by moving the toothed plate, without having to rotate the two positive and negative threaded screws separately, making the operation of the device more convenient and improving the ease of use of the device.

[0023] Preferably, a movable screw is fixedly connected to the outer side of the first gear ring, a movable rod is threadedly connected to the outer side of the movable screw, and a grinding pad is rotatably connected to one end of the movable rod;

[0024] In the embodiment of the present invention, the moving rod is rotated according to the size of the stainless steel pipe, so that the moving rod drives the grinding pad to move to the joint where it is close to the stainless steel pipe. After welding is completed, the moving rod can be driven by the first gear ring, and the grinding pad can be rotated by the moving rod to move the grinding pad to grind the pipe.

[0025] That is, after the device is welded, the grinding pad is moved to fit the stainless steel pipe, and the joint of the stainless steel pipe is ground by rotating the grinding pad, which makes it easier to remove excess welding slag at the grinding point and improves the practicality of the device.

[0026] Preferably, both the movable screw and the movable rod have slots on their surfaces, a plug rod is slidably connected to the inside of the slot, and a nut is threadedly connected to the outside of the plug rod;

[0027] When using this invention, after the polishing pad is pressed against the polishing area, the insert rod can be inserted into the slot of the movable screw and the movable rod, and then the insert rod can be inserted into the slot. The nut is then turned until it is screwed onto the outer sides of both ends of the insert rod.

[0028] That is, after the moving screw is turned, the insert rod can be inserted into the inside of the moving rod to further restrict the position of the moving rod. By tightening two nuts on the outside of the insert rod, the position of the insert rod is further restricted, making the restriction of the moving rod by the insert rod more stable and improving the stability of the device.

[0029] Preferably, a limiting plate is fixedly connected to one side of the support plate, and a limiting groove is formed on the inner side of the fixed plate; the limiting plate and the limiting groove are slidably connected.

[0030] When used in the embodiments of the present invention, the support plate moves more smoothly by rotating the rollers, and the limiting plate is restricted by the limiting grooves on both sides, so that the movement trajectory of the limiting plate is further restricted, thereby further restricting the movement trajectory of the support plate by the limiting plate.

[0031] In other words, by locking the limiting plate in the limiting groove, its movement is less prone to shaking and more stable. The limiting plate restricts the movement of the support plate, making the movement of the support plate more stable and further improving the stability of the device.

[0032] Preferably, a triangular groove is formed on the inner side of the toothed plate, a spring rod is fixedly connected to the outer side of the support plate, and a triangular block is fixedly connected to one end of the spring rod;

[0033] Before using the embodiments of the present invention, ensure that the triangular groove and the triangular block have the same shape and that one side of their plane is far away from the support plate. When using the embodiments of the present invention, pull the triangular block away from the triangular groove, and then pull the toothed plate to drive the second toothed ring to move. After the toothed plate has moved, release the triangular block so that it is inserted into the inner side of the triangular groove in a suitable position.

[0034] That is, after the toothed plate has moved, once it is pushed by an external force to insert into the support plate, the triangular block is inserted into the inside of the triangular groove. The plane of the triangular block blocks the movement of the triangular groove, making it difficult for the toothed plate to continue to enter the inside of the support plate. This makes it less likely for the toothed plate to move due to external force collision and squeezing, resulting in the clamping plate over-clamping the stainless steel tube, which further improves the stability of the device.

[0035] The present invention is beneficial in that:

[0036] 1. The high-precision butt welding machine for stainless steel pipes described in this invention addresses the issue that, before the specific application of this embodiment, after pipes of different sizes are joined, the joint is clamped by a clamping plate, aligning the center of the pipe with the center of the fixing ring. Since pipes of different sizes have different diameters, the distance between the outer wall of the pipe and the laser welding assembly varies. Therefore, it is necessary to ensure that the laser welding assembly is a laser welder with an integrated visual positioning system, laser rangefinder, motor-driven lens, and closed-loop control algorithm. This allows the laser welding assembly to adjust its welding position according to the varying distances between the outer wall of the pipe and the laser welding assembly, ensuring that the laser welding assembly can weld pipes of different sizes. Welding is performed at the joint. Before welding, ensure that the wiring on the outside of the laser welding assembly has sufficient length for one full rotation. Fix the remaining length of the wiring so that when the laser welding assembly rotates, the wiring can rotate synchronously with the laser welding assembly for one full rotation. After the laser welding assembly rotates one full rotation clockwise, reverse the laser welding assembly to return it to its original position. Since the laser welding assembly only rotates clockwise or counterclockwise once, the wiring will return to its initial "exactly one full rotation" state after one full rotation, thus preventing it from winding around the outside of the steel pipe. Ensure that the clamping plates, as shown in the figure, have an arc-shaped surface on the side closest to each other. The two stainless steel pipes are joined together at their openings and passed through the inner side of the fixing ring. Rotating the positive and negative threaded screws moves the clamping plates. Since the two clamping plates are located on opposite sides of the screws, they move closer together, clamping and fixing the stainless steel pipes. The curved surfaces of the two clamping plates guide the pipes for centering. At this point, ensure the weld joints of the two stainless steel pipes are aligned with the laser welding assembly. Then, the laser welding assembly is activated to melt and weld the pipes together. Simultaneously, the first motor drives the gear to rotate, which in turn drives the first gear ring to rotate. A retaining ring engages with the inner side of the fixing ring, thus securing the second... The rotation track of the first gear ring is restricted, allowing it to drive the laser welding component inside to rotate stably, thereby performing comprehensive welding at the pipe joint. Specifically, after aligning the pipe joint with the laser welding component, it is clamped and fixed by a clamping plate. The rotation of the laser welding component eliminates the need for the pipe to rotate, thus preventing the welding position from shifting. By providing sufficient length for the wiring on the outside of the laser welding component, the wiring can rotate synchronously with the laser welding component, without restricting its rotation. This makes the welding process more stable and improves the overall stability of the device.

[0037] 2. Before using the high-precision butt welding machine for stainless steel pipes described in this invention, ensure that after the adjusting screw drives the support plate to the maximum position inside the fixed plate, the distance between the fixed block and the fixed ring is the same as the distance between the fixed ring and the movable plate. When using the embodiment of this invention, first drive the movable plate to rotate through the third motor, so that the movable plate rotates to the upper end and lower, and directly put the two stainless steel pipes on the outside of the support rod and stick them to each other, with one end of one stainless steel pipe sticking to one side of the fixed block. Since the two stainless steel pipes are joined together and placed between the fixed block and the movable plate, drive the adjusting screw to rotate through the second motor, and drive the support plate to move through the adjusting screw, so that the support plate drives the movable plate to approach the fixed block, thereby clamping and fixing the two ends of the two stainless steel pipes through the movable plate and the fixed block.

[0038] In other words, when fixing two stainless steel tubes of the same length, whose length after docking is equal to the distance between the movable plate and the fixed block, the third motor first drives the movable plate to rotate, so that the movable plate rotates to the upper end and lower, and the two stainless steel tubes are directly sleeved on the outside of the support rod and pressed tightly against each other, with one end of one stainless steel tube pressed against one side of the fixed block. The fixed block, in conjunction with the movable plate, presses the two ends of the two docked stainless steel tubes that are far apart, so that the aligned welding point of the stainless steel tubes is easy to align with the laser welding assembly, so as to facilitate subsequent welding. The fixed block, in conjunction with the movable plate, presses the two ends of the two docked stainless steel tubes that are far apart, and then the clamping plate further clamps and fixes the stainless steel tubes, making the fixation of the stainless steel tubes more stable, and further improving the convenience of centering alignment and the stability of clamping and fixing of the device. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a front view of the structure of the present invention;

[0041] Figure 2 This is a side view of the structure in this invention;

[0042] Figure 3 This is an enlarged schematic diagram of the structure at point A in this invention;

[0043] Figure 4 This is a schematic diagram of the support plate structure in this invention;

[0044] Figure 5 This is a schematic diagram of the clamping plate structure in this invention;

[0045] Figure 6 This is a schematic diagram of the fixed ring structure in this invention;

[0046] Figure 7 This is a schematic diagram of the active block structure in this invention;

[0047] Figure 8 This is a schematic diagram of the support rod structure in this invention;

[0048] Figure 9 This is a schematic diagram of the insertion rod structure in this invention;

[0049] Figure 10 This is an enlarged schematic diagram of the structure at point B in this invention.

[0050] In the diagram: 1. Support plate; 2. Threaded screw (both positive and negative); 3. Clamping plate; 4. Fixing ring; 5. First motor; 6. Gear; 7. First gear ring; 8. Snap ring; 9. Laser welding assembly; 10. Movable plate; 11. Fixing plate; 12. Second motor; 13. Adjusting screw; 14. Roller; 15. Fixing block; 16. Hydraulic cylinder; 17. Movable block; 18. T-slot; 19. T-block; 20. Support rod; 301. Guide groove; 21. Round plate; 22. Slide groove; 23. Mounting groove; 24. Guide rod; 25. Groove; 26. Pulley; 27. Second gear ring; 28. Gear plate; 29. ​​Moving screw; 30. Moving rod; 31. Grinding pad; 32. Slot; 33. Insert rod; 34. Nut; 35. Limiting plate; 36. Limiting groove; 37. Triangular groove; 38. Spring rod; 39. Triangular block. Detailed Implementation

[0051] 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.

[0052] Specific implementation examples are given below.

[0053] Please see Figures 1 to 10As shown in the embodiment of the present invention, a high-precision butt welding machine for stainless steel pipes includes a support plate 1. A screw rod 2 with positive and negative threads is rotatably connected to the upper side of the support plate 1. A clamping plate 3 is threadedly connected to the outer side of the screw rod 2. A fixing ring 4 is fixedly connected to the outer side of the support plate 1. A first motor 5 is fixedly connected to the outer side of the fixing ring 4. A gear 6 is fixedly connected to the output end of the first motor 5. A first gear ring 7 meshes with the outer side of the gear 6. Snap rings 8 are fixedly connected to the two planes of the first gear ring 7. The snap rings 8 and the fixing ring 4 are slidably connected. A laser welding component 9 is provided on the inner side of the first gear ring 7.

[0054] Before using the specific embodiments of the present invention, after pipes of different sizes are joined, their joints are clamped by the clamping plate 3, and the center of the pipe is aligned with the center of the fixing ring 4. Since pipes of different sizes have different diameters, the distance between the outer wall of the pipe and the laser welding assembly 9 varies. Therefore, it is necessary to ensure that the laser welding assembly 9 is a laser welder with an integrated visual positioning system, laser rangefinder, motor-driven lens, and closed-loop control algorithm. This allows the laser welding assembly 9 to adjust its welding position according to the different distances between the outer wall of the pipe and the laser welding assembly 9, ensuring that the laser welding assembly 9 can weld pipes of different sizes at their joints. Before welding, ensure that the wiring on the outside of the laser welding assembly 9 has sufficient length for one full rotation, and fix the remaining length of the wiring. This ensures that when the laser welding assembly 9 rotates, the wiring can rotate synchronously with the laser welding assembly 9, as the reserved length allows for one full rotation. After the laser welding assembly 9 rotates one full rotation clockwise, reverse it to return it to its original position. Since the laser welding assembly 9 only rotates clockwise or counterclockwise once, the wiring will return to its initial "exactly one full rotation" state after one full rotation, thus preventing it from winding around the outside of the steel pipe and ensuring that the clamping plate 3... Figure 1 As shown, the sides that are close to each other are arc-shaped, which connects the openings of the two stainless steel pipes and passes through the inner side of the fixing ring 4. By rotating the positive and negative threaded screws 2, the clamping plates 3 are moved. Since the two clamping plates 3 are located on the positive and negative sides of the positive and negative threaded screws 2 respectively, the clamping plates 3 are brought close to each other, thereby clamping and fixing the stainless steel pipes. The arc-shaped surfaces of the two clamping plates 3 guide the pipes to facilitate the centered positioning of the pipes. At this time, ensure that the weld joint of the two stainless steel pipes is aligned with the laser welding assembly 9. Then, start the laser welding assembly 9 to melt and weld the pipes together. At the same time, the first motor 5 drives the gear 6 to rotate, and the gear 6 drives the first gear ring 7 to rotate. The retaining ring 8 is inserted into the inner side of the fixing ring 4, thereby restricting the rotation track of the first gear ring 7. This allows the first gear ring 7 to drive the laser welding assembly 9 inside it to rotate stably, thereby fully welding the pipe joint.

[0055] That is, after placing the pipe joint in alignment with the laser welding assembly 9, it is clamped and fixed by the clamping plate 3. The rotation of the laser welding assembly 9 eliminates the need for the pipe to rotate, thus preventing the welding position of the pipe from shifting. By providing sufficient length for the wiring on the outside of the laser welding assembly 9, the wiring can rotate synchronously with the laser welding assembly 9, thus not restricting the rotation of the laser welding assembly 9, making the welding of the device more stable and improving the stability of the device.

[0056] Please see Figure 1 and Figure 2 As shown, a third motor 101 is fixedly connected to the inner side of the support plate 1, and a movable plate 10 is fixedly connected to the output end of the third motor 101. A fixed plate 11 is slidably connected to the outer side of the support plate 1. A second motor 12 is fixedly connected to one end of the fixed plate 11. An adjusting screw 13 is fixedly connected to the output end of the second motor 12. The adjusting screw 13 is threadedly connected to the support plate 1. A roller 14 is rotatably connected to the lower side of the support plate 1. A fixed block 15 is fixedly connected to the outer side of the fixed plate 11. The movable plate 10 and the fixed block 15 are used in conjunction.

[0057] Before using the specific embodiments of the present invention, ensure that after the adjusting screw 13 drives the support plate 1 to move to the maximum position inside the fixed plate 11, the distance between the fixed block 15 and the fixed ring 4 is the same as the distance between the fixed ring 4 and the movable plate 10. When using the embodiments of the present invention, first drive the movable plate 10 to rotate through the third motor 101, so that the movable plate 10 rotates to the upper end and lower, and directly put the two stainless steel tubes on the outside of the support rod 20 and stick them to each other, and one end of one stainless steel tube is pressed against one side of the fixed block 15. Since the two stainless steel tubes are connected and placed between the fixed block 15 and the movable plate 10, drive the adjusting screw 13 to rotate through the second motor 12, and drive the support plate 1 to move through the adjusting screw 13, so that the support plate 1 drives the movable plate 10 to approach the fixed block 15, thereby clamping and fixing the two ends of the two stainless steel tubes through the movable plate 10 and the fixed block 15.

[0058] That is, when fixing two stainless steel pipes of the same length and whose length after docking is equal to the distance between the movable plate 10 and the fixed block 15, the third motor 101 first drives the movable plate 10 to rotate, so that the movable plate 10 rotates to the upper end and lower, and the two stainless steel pipes are directly sleeved on the outside of the support rod 20 and pressed tightly against each other, with one end of one stainless steel pipe pressed against one side of the fixed block 15. The fixed block 15 cooperates with the movable plate 10 to press the two ends of the two docked stainless steel pipes that are far apart from each other, so that the alignment and welding point of the stainless steel pipes is easy to align with the laser welding component 9, so as to facilitate subsequent welding. The fixed block 15 cooperates with the movable plate 10 to press the two ends of the two docked stainless steel pipes that are far apart from each other, and then the clamping plate 3 further clamps and fixes the stainless steel pipes, making the fixation of the stainless steel pipes more stable, and further improving the convenience of the device's centering alignment and the stability of the clamping and fixing.

[0059] See also Figure 1 , Figure 7 and Figure 8 As shown, a hydraulic cylinder 16 is fixedly connected to the outside of the fixed block 15, and a movable block 17 is fixedly connected to the output end of the hydraulic cylinder 16. A T-slot 18 is provided on the inner side of the movable block 17, and a T-block 19 is slidably connected to the inner side of the T-slot 18. A support rod 20 is fixedly connected to one end of the T-block 19, and a circular plate 21 is fixedly connected to the outside of the support rod 20. A sliding groove 22 is provided on the surface of the fixed block 15, and the sliding groove 22 and the support rod 20 are slidably connected. The circular plate 21 and the fixed block 15 are used in conjunction.

[0060] Before using any specific embodiment of the present invention, ensure that the active block 17 is as follows: Figure 7 and Figure 8The outer side of an approximately elliptical irregular plate is connected to multiple triangular plates. The T-slot 18 on the inner side of the movable block 17 is set at an outward tilt angle with one end as the center. This allows the T-slot 18 to push the T-blocks 19 away from each other during vertical movement, as the T-blocks 19 are restricted to a fixed position. The circular plates 21 on both sides of the fixed block 15 are ensured to be tightly fitted to the two side planes of the fixed block 15. The support rods 20 are made of a material with a melting point higher than that of stainless steel pipes. The distance between multiple support rods 20 is less than the inner diameter of the stainless steel pipe, and the length of each support rod 20 is greater than that of a single stainless steel pipe. In the embodiment of the invention, after the stainless steel pipe passes through the inner side of the fixing ring 4, the support rod 20 can be inserted into the inner side of the two stainless steel pipes. After the clamping plate 3, together with the fixing block 15 and the movable plate 10, clamps and fixes the stainless steel pipe, the movable block 17 can be moved by the hydraulic cylinder 16. Because the movable block 17 has multiple inclined surfaces on its outer side and the T-slot 18 is set inside the inclined surface, the T-slot 18 is inclined. After the movable block 17 moves, the T-slot 18 will push the T-block 19 away from each other, so that the T-block 19 drives the support rod 20 to expand outward, so that the support rod 20 can be close to the inner wall of the stainless steel pipe.

[0061] In other words, when stainless steel pipes are joined, because the distance between multiple support rods 20 is less than the inner diameter of the stainless steel pipe, and the length of the support rods 20 is greater than the length of a single stainless steel pipe, multiple support rods 20 can be inserted into the inner side of two stainless steel pipes. The support rods 20 expand to simultaneously adhere to the inner walls of the two stainless steel pipes, thereby further supporting and aligning the two stainless steel pipes. This makes the fixing and alignment of the stainless steel pipes more stable, and the subsequent welding more stable. After welding, by moving the support plate 1, the movable plate 10 is moved away from the stainless steel pipe. Then, the third motor 101 drives the movable plate 10 to rotate, so that the upper side of the movable plate 10 rotates away from the stainless steel pipe. At this time, the welded stainless steel pipe is pulled to separate from the support rods 20 and can be removed, further improving the welding stability of the device.

[0062] Please see Figure 1 , Figure 2 and Figure 4 As shown, the inner side of the support rod 20 is provided with a guide groove 301, and the surface of the movable plate 10 is provided with a mounting groove 23. The inner side of the mounting groove 23 is threaded with a guide rod 24, and the guide rod 24 and the guide groove 301 are used in conjunction.

[0063] Before using the specific embodiments of the present invention, ensure that the inclined surface inside the guide groove 301 and the tip of the guide rod 24 are both conical. When using the embodiments of the present invention, according to the inner wall size of the stainless steel tube, the guide rod 24 is screwed into the inner side of the mounting groove 23 at different positions. After the support rod 20 supports and fixes the inner wall of the stainless steel tube, the support rod 20 is tightly restricted by the stainless steel tube, so that when one end of the movable plate 10 approaches the fixed block 15, the movable plate 10 drives the guide rod 24 to move to the inner side of the guide groove 301.

[0064] That is, after the support rod 20 is tightly attached to the inner wall of the stainless steel tube, the guide rod 24 can be inserted into the inner side of the guide groove 301 to mechanically limit the end of the support rod 20 away from the fixing block 15, preventing the support rod 20 from retracting after supporting the inner wall of the stainless steel tube, making the support rod 20 support the inner wall of the stainless steel tube more stable and improving the stability of the device.

[0065] Please see Figure 2 and Figure 8 As shown, a groove 25 is provided on the inner side of the support rod 20, and a pulley 26 is slidably connected to the inner side of the groove 25;

[0066] Before using the specific embodiments of the present invention, ensure that the pulley 26 is made of a material with a melting point higher than that of the stainless steel tube. When using the embodiments of the present invention, the stainless steel tube can be directly sleeved on the outside of the support rod 20. The support rod 20 supports the stainless steel tube by moving away from each other. Then, the stainless steel tube is pushed to move by moving the movable plate 10, so that the stainless steel tube rubs against the pulley 26 when it moves, causing the pulley 26 to rotate.

[0067] In other words, when connecting stainless steel pipes, the stainless steel pipes can be supported and fixed first by the support rod 20, making it easy to align the stainless steel pipes without the need for additional manual lifting and support. When the movable plate 10 moves, the pulley 26 supports the stainless steel pipes before the support rod 20, and the rotation of the pulley 26 makes it easy for the stainless steel pipes to slide, thus facilitating the movable plate 10 to cooperate with the fixing block 15 to center and position them. Finally, the clamping plate 3 clamps and fixes the stainless steel pipes, making the stainless steel pipes fixed and aligned. There is no need for the staff to keep them at a fixed height, which improves the convenience of using the device.

[0068] Please see Figure 1 , Figure 2 and Figure 5 As shown, a second toothed ring 27 is fixedly connected to the outer side of the positive and negative threaded screw 2, and a toothed plate 28 is engaged on the outer side of the second toothed ring 27. The toothed plate 28 and the support plate 1 are slidably connected.

[0069] When used in the embodiments of the present invention, after the support rod 20 supports and fixes the inner wall of the stainless steel tube, the toothed plate 28 can be pushed to move, so that the toothed plate 28 drives multiple second toothed rings 27 to rotate synchronously, and the second toothed rings 27 drive multiple positive and negative thread screws 2 to rotate synchronously.

[0070] That is, when it is necessary to rotate the positive and negative thread screws 2, the two positive and negative thread screws 2 can be rotated by simply moving the tooth plate 28, without having to rotate the two positive and negative thread screws 2 separately, which makes the operation of the device more convenient and improves the ease of use of the device.

[0071] Please see Figure 2 and Figure 9 As shown, a movable screw 29 is fixedly connected to the outer side of the first gear ring 7, and a movable rod 30 is threadedly connected to the outer side of the movable screw 29. A polishing pad 31 is rotatably connected to one end of the movable rod 30.

[0072] In the embodiment of the present invention, the moving rod 30 is rotated according to the size of the stainless steel pipe, so that the moving rod 30 drives the grinding pad 31 to move to the joint where it is close to the stainless steel pipe. After welding is completed, the moving rod 30 can be moved by the first gear ring 7, and the grinding pad 31 can be rotated by the moving rod 30, so that the grinding pad 31 moves to grind the pipe.

[0073] That is, after the device is welded, the grinding pad 31 is moved to fit the stainless steel pipe, and the joint of the stainless steel pipe is ground by rotating the grinding pad 31, which makes it easier to remove excess welding slag at the grinding point and improves the practicality of the device.

[0074] Please see Figure 9 As shown, slots 32 are provided on the surfaces of both the movable screw 29 and the movable rod 30. A plug rod 33 is slidably connected to the inner side of the slot 32, and a nut 34 is threadedly connected to the outer side of the plug rod 33.

[0075] When used in the embodiments of the present invention, after the polishing pad 31 is pressed against the polishing area, the insert rod 33 can be inserted into the inner side of the slot 32 of the movable screw 29 and the movable rod 30, and then the insert rod 33 is inserted into the slot 32. The nut 34 is rotated until it is screwed onto the outer sides of both ends of the insert rod 33.

[0076] That is, after the moving screw 29 is turned, the insert rod 33 can be inserted into the inside of it and the moving rod 30 to further restrict the position of the moving rod 30. By screwing two nuts 34 on the outside of the insert rod 33, the position of the insert rod 33 is further restricted, making the restriction of the moving rod 30 by the insert rod 33 more stable and improving the stability of the device.

[0077] Please see Figure 1 and Figure 4As shown, a limiting plate 35 is fixedly connected to one side of the support plate 1, and a limiting groove 36 is formed on the inner side of the fixed plate 11. The limiting plate 35 and the limiting groove 36 are slidably connected.

[0078] When the support plate 1 moves, the rotation of the roller 14 makes its movement smoother, and the limiting plate 35 is restricted by the limiting grooves 36 on both sides, so that the movement trajectory of the limiting plate 35 is further restricted, and the movement trajectory of the support plate 1 is further restricted by the limiting plate 35.

[0079] That is, by locking the limiting plate 35 with the limiting groove 36, the movement of the limiting plate 35 is less likely to shake and more stable, thus limiting the movement of the support plate 1 and making the movement of the support plate 1 more stable, thereby further improving the stability of the device.

[0080] Please see Figure 3 As shown, a triangular groove 37 is provided on the inner side of the toothed plate 28, and a spring rod 38 is fixedly connected to the outer side of the support plate 1. A triangular block 39 is fixedly connected to one end of the spring rod 38.

[0081] Before using the specific embodiment of the present invention, ensure that the triangular groove 37 and the triangular block 39 have the same shape and that one side of their plane is far away from the support plate 1. When using the embodiment of the present invention, pull the triangular block 39 away from the triangular groove 37, and then pull the toothed plate 28 to drive the second toothed ring 27 to move. After the toothed plate 28 has moved, release the triangular block 39 so that it is inserted into the inner side of the triangular groove 37 in a suitable position.

[0082] That is, after the toothed plate 28 has moved, once it is pushed by an external force to insert into the support plate 1, the triangular block 39 is inserted into the inside of the triangular groove 37. The plane of the triangular block 39 blocks the movement of the triangular groove 37, making it difficult for the toothed plate 28 to continue to enter the inside of the support plate 1. This makes it less likely for the toothed plate 28 to move due to external force collision and squeezing, resulting in the clamping plate 3 over-clamping the stainless steel tube, which further improves the stability of the device.

[0083] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A high-precision butt welding machine for stainless steel pipes, comprising a support plate (1), characterized in that: The upper side of the support plate (1) is rotatably connected to a screw rod (2) with both positive and negative threads. The outer side of the screw rod (2) is threaded with a clamping plate (3). The outer side of the support plate (1) is fixedly connected to a fixing ring (4). The outer side of the fixing ring (4) is fixedly connected to a first motor (5). The output end of the first motor (5) is fixedly connected to a gear (6). The outer side of the gear (6) is meshed with a first gear ring (7). The two sides of the first gear ring (7) are fixedly connected to retaining rings (8). The retaining rings (8) and the fixing ring (4) are slidably connected. The inner side of the first gear ring (7) is provided with a laser welding assembly (9). The inner side of the support plate (1) is fixedly connected to a third motor (101). The output end of the third motor (101) is fixedly connected to a movable... The support plate (1) is slidably connected to a fixed plate (11) on the outside. A second motor (12) is fixedly connected to one end of the fixed plate (11). An adjusting screw (13) is fixedly connected to the output end of the second motor (12). The adjusting screw (13) is threadedly connected to the support plate (1). A roller (14) is rotatably connected to the lower side of the support plate (1). A fixed block (15) is fixedly connected to the outside of the fixed plate (11). The movable plate (10) and the fixed block (15) are used together. A hydraulic cylinder (16) is fixedly connected to the outside of the fixed block (15). A movable block (17) is fixedly connected to the output end of the hydraulic cylinder (16). A T-slot (18) is opened on the inner side of the movable block (17). 8) A T-shaped block (19) is slidably connected to the inner side. A support rod (20) is fixedly connected to one end of the T-shaped block (19). A circular plate (21) is fixedly connected to the outer side of the support rod (20). A sliding groove (22) is provided on the surface of the fixed block (15). The sliding groove (22) and the support rod (20) are slidably connected. The circular plate (21) and the fixed block (15) are used in conjunction. A guide groove (301) is provided on the inner side of the support rod (20). An installation groove (23) is provided on the surface of the movable plate (10). A guide rod (24) is threadedly connected to the inner side of the installation groove (23). The guide rod (24) and the guide groove (301) are used in conjunction. A groove (25) is provided on the inner side of the support rod (20). A pulley (26) is slidably connected to the inner side. A second toothed ring (27) is fixedly connected to the outer side of the positive and negative threaded screw (2). A toothed plate (28) meshes with the outer side of the second toothed ring (27). The toothed plate (28) and the support plate (1) are slidably connected. The third motor (101) drives the movable plate (10) to rotate. First, the third motor (101) drives the movable plate (10) to rotate, so that the movable plate (10) rotates to the lower upper end. The two stainless steel tubes are directly sleeved on the outer side of the support rod (20) and pressed tightly against each other. One end of one stainless steel tube is pressed against one side of the fixed block (15). Since the two stainless steel tubes are joined together and placed between the fixed block (15) and the movable plate (10), the second motor (12) drives the adjusting screw (13) to rotate.By adjusting the screw (13), the support plate (1) is moved, causing the support plate (1) to move the movable plate (10) closer to the fixed block (15). This allows the movable plate (10) to work in conjunction with the fixed block (15) to clamp and fix the two ends of the stainless steel pipes.

2. The high-precision butt welding machine for stainless steel pipes according to claim 1, characterized in that: A movable screw (29) is fixedly connected to the outside of the first gear ring (7), and a movable rod (30) is threadedly connected to the outside of the movable screw (29). A polishing pad (31) is rotatably connected to one end of the movable rod (30).

3. A high-precision butt welding machine for stainless steel pipes according to claim 2, characterized in that: The surfaces of the movable screw (29) and the movable rod (30) are provided with slots (32), and the inner side of the slot (32) is slidably connected to the insert rod (33), and the outer side of the insert rod (33) is threadedly connected to the nut (34).

4. A high-precision butt welding machine for stainless steel pipes according to claim 3, characterized in that: A limiting plate (35) is fixedly connected to one side of the support plate (1), and a limiting groove (36) is opened on the inner side of the fixing plate (11). The limiting plate (35) and the limiting groove (36) are slidably connected.

5. A high-precision butt welding machine for stainless steel pipes according to claim 4, characterized in that: The toothed plate (28) has a triangular groove (37) on its inner side, and a spring rod (38) is fixedly connected to the outer side of the support plate (1). A triangular block (39) is fixedly connected to one end of the spring rod (38).

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