Metal pipe machining laser cutting machine and method

Abstract

The invention discloses a metal pipe machining laser cutting machine and method, and relates to the technical field of laser cutting. The metal pipe machining laser cutting machine comprises a machine body, a limiting connecting piece connected with a treatment bin is arranged at one end of a driving rod, and an equidistant adjusting piece connected with the limiting connecting piece is arranged at the top of the inner wall of the treatment bin; and the inner side of the treatment bin is connected with a laser transmitter through an equidistant adjusting piece. By arranging the equidistant adjusting part, when a connecting frame extrudes one end of a first pressing rod, the first pressing rod can push a first inserting rod to move, so that the moving distance of a piston rod is equal to that of a second inserting rod, and therefore when a clamping plate makes contact with the outer wall of a metal pipe, a guide wheel makes contact with the outer wall of the metal pipe as well; in this way, the distance between the laser transmitter and the outer walls of the metal pipes with different diameters can be kept unchanged all the time, the position of the laser transmitter does not need to be adjusted according to the diameters of the metal pipes, operation is easy, and the cutting efficiency of the equipment on the metal pipes is further improved.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, specifically to a laser cutting machine and method for processing metal tubes. Background Technology

[0002] When processing pneumatic rods and gas springs, the cutting of thin-walled, precision tubing is often required. Strict processing standards are imposed on the flatness, perpendicularity, burr-free cuts, the production of cutting powder and metal chips, and zero deformation. A laser cutting machine utilizes the energy released by a laser beam to melt and evaporate the irradiated portion of the workpiece, thus achieving the cutting purpose. Metal tubing is a collective term for components in piping systems that serve functions such as connection, control, direction changing, flow diversion, sealing, and support. Laser cutting is a core process solution for high-end processing of pneumatic rods and gas spring components, employing a non-contact cutting method. This effectively avoids problems such as deformation, warping, and scratches on the pipe wall, as well as the adhesion of cutting powder and iron filings to the pipe wall. It fundamentally ensures the dimensional accuracy and surface quality of the pipe and provides excellent pipe conditions for subsequent surface treatment. Moreover, the laser beam has high focusing degree, narrow cutting gap and excellent cut surface finish, with no burrs, no slag, and no heat-affected zone. After cutting, there is no need for secondary grinding or chamfering, which can directly meet the sealing and fitting requirements of subsequent assembly of pneumatic rods and gas springs. More importantly, it provides workers in the cutting workshop with a quieter and cleaner working environment, completely avoiding problems such as assembly jamming, sealing failure and pneumatic performance degradation caused by cutting defects.

[0003] The process of laser welding metal tubes requires cutting metal tubes of different diameters. Different clamps need to be changed when cutting different metal tubes, which is cumbersome. In addition, the distance between the laser head and the outer wall of the metal tube needs to be adjusted during the cutting process, which further affects the cutting efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a laser cutting machine and method for metal tube processing in order to solve the problem of low cutting efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a metal tube processing laser cutting machine, comprising a machine body, a processing chamber installed on the top of the machine body, a controller installed on one side of the processing chamber on the top of the machine body, a guide tube below the controller on the top of the machine body, a first motor installed on the side of the processing chamber away from the controller, a drive rod connected to the output end of the first motor to the inner side of the processing chamber, a limiting connector connected to the processing chamber at one end of the drive rod, an equidistant adjustment member connected to the limiting connector at the top of the inner wall of the processing chamber, and a laser emitter connected to the inner side of the processing chamber through the equidistant adjustment member; The limiting connector includes a connecting block installed at one end of the drive rod. Extension rods are installed on both sides of the connecting block. One end of the extension rod is provided with a positioning ring that is rotatably connected to the processing chamber. Two locking sleeves are sleeved on the outer side of the extension rod. The two locking sleeves are symmetrically arranged along the vertical central axis of the extension rod. Baffles located on both sides of the locking sleeves are fixed on the outer side of the extension rod. Threaded grooves are opened on the outer side of the extension rod. Movable links located outside the threaded grooves are provided between the locking sleeves and the connecting block, and between the locking sleeves and the positioning ring. A connecting frame is installed on the outer wall of the movable link. One end of the connecting frame is rotatably connected to a first pressing rod via a rotating shaft. A first insert rod extending to the inner side of the locking sleeve is inserted into the outer side of the locking sleeve. The end of the first pressing rod away from the connecting frame is rotatably connected to the first insert rod via a rotating shaft. A clamping plate located inside the locking sleeve is provided at one end of the connecting block. A second motor located on one side of the drive rod and connected to the extension rod is provided at one end of the connecting block.

[0006] As a further embodiment of the present invention: the two sides of the movable link are respectively provided with threaded holes that match the threaded groove and through holes that match the extension rod.

[0007] As a further aspect of the present invention: the number of connecting frames is set to multiple, and the multiple connecting frames are distributed at equal distances along the center of the movable link.

[0008] As a further embodiment of the present invention: the center of the movable link, the center of the locking sleeve, and the center of the positioning ring are coaxial.

[0009] As a further embodiment of the present invention: the equidistant adjustment component includes a first annular chamber installed inside the processing chamber and located outside the positioning rotating ring. A second annular chamber is rotatably connected to one end of the first annular chamber. A first guide pipe is connected to the outer wall of the first annular chamber. A first piston cylinder is provided at one end of the first guide pipe. A piston rod extending to the bottom of the first piston cylinder is inserted inside the first piston cylinder. The laser emitter is installed at the bottom end of the piston rod and located below the first piston cylinder. Limiting frames located on both sides of the laser emitter are provided on the outer side of the piston rod. Guide wheels are installed at the bottom of the limiting frames. A second guide pipe is installed at one end of the second annular chamber. A second piston cylinder is connected to one end of the second guide pipe. Connecting frames connected to the outer wall of the locking sleeve are provided on both sides of the second piston cylinder. A piston block is slidably connected to the inner side of the second piston cylinder. A second insert rod extending to the outer side of the second piston cylinder is provided at the bottom end of the piston block. A second pressing rod is rotatably connected to one end of the second insert rod via a rotating shaft. The end of the second pressing rod away from the second insert rod is rotatably connected to the connecting frame via a rotating shaft.

[0010] As a further aspect of the present invention: the distance from the guide wheel to the center of the locking sleeve is equal to the distance from the clamping plate to the center of the locking sleeve.

[0011] As a further embodiment of the present invention: the second pressing rod and the first pressing rod are symmetrically arranged along the transverse central axis of the connecting frame.

[0012] As a further embodiment of the present invention: the diameter of the second piston cylinder is equal to that of the first piston cylinder.

[0013] As a further aspect of the present invention: the distance from the guide wheel to the center of the locking sleeve is less than the distance from the bottom of the laser emitter to the center of the locking sleeve.

[0014] This invention also discloses a laser cutting method for metal tube processing, using the aforementioned metal tube processing laser cutting machine, comprising the following steps: S1: First, the metal tube to be cut is transported to the inside of the processing chamber through the conduit fitting. During this process, the metal tube passes through the positioning ring and is positioned inside the two locking sleeves. S2: Start the second motor, which drives the locking sleeve to rotate, causing the extension rod to rotate relative to the connecting block. This allows the movable link to move along the threaded groove toward the locking sleeve. At this time, the locking sleeve is always in the same position on the extension rod due to the limiting and blocking effect of the baffle. This causes the connecting frame to press the first pressing rod, which in turn presses one end of the first insert rod. This causes the first insert rod to move the clamping plate toward the center of the locking sleeve, thus providing multi-directional support for the metal tube and making the center of the metal tube coaxial with the center of the locking sleeve. S3: The operation of the equidistant adjustment component ensures that the laser emitter maintains a fixed distance from the outer wall of metal tubes of different diameters. S4: Start the laser emitter and the first motor. When the laser emitter is in operation, it processes and cuts a part of the metal tube with a laser beam. The operation of the first motor causes the connecting block to rotate. At this time, the connecting block drives the positioning ring to rotate through the extension rod, so that the laser beam emitted by the laser emitter can perform a ring cut on the metal tube. S5: After cutting, the second motor drives the extension rod to rotate in the opposite direction so that the clamping plate loses its clamping limit on the metal tube, thereby allowing a section of the metal tube near the connecting block to fall into the processing chamber.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting a limiting connector, the second motor drives the locking sleeve to rotate, causing the extension rod to rotate relative to the connecting block. This allows the movable link to move along the threaded groove towards the locking sleeve. At this time, the locking sleeve is always located in the same position on the extension rod due to the limiting and blocking effect of the baffle. This causes the connecting frame to press the first pressing rod, which in turn presses one end of the first insert rod, causing the first insert rod to move the clamping plate towards the center of the locking sleeve. This provides multi-directional support for the metal tube, making the center of the metal tube and the center of the locking sleeve coaxial. The operation of the first motor causes the connecting block to rotate. At this time, the connecting block drives the positioning ring to rotate through the extension rod, so that the laser beam emitted by the laser emitter can perform ring cutting on the metal tube, thereby achieving rapid positioning and cutting of the metal tube and improving the overall cutting efficiency of the equipment for metal tubes. 2. By setting an equidistant adjustment component, when the connecting frame presses one end of the first pressing rod, the first pressing rod will push the first insert rod to move. During this process, the second insert rod will also move due to the pressure of the second pressing rod, so that the moving distance of the second insert rod is equal to that of the first insert rod. At this time, the solution medium inside the second piston cylinder will enter the second guide tube through the pressure of the piston block. The solution medium inside the first annular chamber will enter the first piston cylinder through the first guide tube, so that the moving distance of the piston rod and the second insert rod is equal. Thus, the moving distance of the laser emitter is equal to the moving distance of the clamping plate. This ensures that when the clamping plate contacts the outer wall of the metal tube, the guide wheel also contacts the outer wall of the metal tube. Since the distance between the bottom of the laser emitter and the bottom of the guide wheel is fixed, the distance between the laser emitter and the outer wall of metal tubes of different diameters remains constant. There is no need to adjust the position of the laser emitter according to the diameter of the metal tube, which simplifies the operation and further improves the cutting efficiency of the equipment for metal tubes. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the connection between the laser emitter and the drive rod of the present invention; Figure 3 This is a schematic diagram showing the connection between the positioning rotating ring and the drive rod of the present invention; Figure 4 This is a schematic diagram showing the connection between the locking sleeve and the movable link of the present invention; Figure 5 This is a schematic diagram showing the connection between the laser emitter and the first annular chamber of the present invention; Figure 6 This is a schematic diagram showing the connection between the first insertion rod and the second insertion rod of the present invention; Figure 7This is a schematic diagram of the internal structure of the second piston cylinder of the present invention; Figure 8 This is a schematic diagram showing the connection between the first annular compartment and the second annular compartment of the present invention.

[0017] In the diagram: 1. Body; 2. Processing chamber; 3. Conduit; 4. Controller; 5. First motor; 6. Laser emitter; 7. First annular chamber; 8. Second annular chamber; 9. Positioning ring; 10. Extension rod; 11. Locking sleeve; 12. Threaded groove; 13. Second motor; 14. Drive rod; 15. Connecting block; 16. Movable link; 17. Connecting frame; 18. First pressing rod; 19. Limiting frame; 20. First piston cylinder; 21. First guide tube; 22. Baffle; 23. First insertion rod; 24. Second pressing rod; 25. Clamping plate; 26. Second piston cylinder; 27. Second guide tube; 28. Connecting frame; 29. ​​Guide wheel; 30. Piston rod; 31. Second insertion rod; 32. Piston block. Detailed Implementation

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

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0020] Please see Figures 1 to 8In this embodiment of the invention, a metal tube processing laser cutting machine includes a body 1, a processing chamber 2 installed on the top of the body 1, a controller 4 installed on one side of the processing chamber 2 on the top of the body 1, a guide tube 3 located below the controller 4 on the top of the body 1, a first motor 5 installed on the side of the processing chamber 2 away from the controller 4, a drive rod 14 located inside the processing chamber 2 connected to the output end of the first motor 5, a limiting connector connected to the processing chamber 2 at one end of the drive rod 14, an equidistant adjustment member connected to the limiting connector at the top of the inner wall of the processing chamber 2, and a laser emitter 6 connected to the inner side of the processing chamber 2 through the equidistant adjustment member. The limiting connector includes a connecting block 15 installed at one end of the drive rod 14. Extension rods 10 are installed on both sides of the connecting block 15. One end of the extension rod 10 is provided with a positioning ring 9 that is rotatably connected to the processing chamber 2. Two locking sleeves 11 are sleeved on the outer side of the extension rod 10. The two locking sleeves 11 are symmetrically arranged along the vertical central axis of the extension rod 10. Baffles 22 located on both sides of the locking sleeves 11 are fixed on the outer side of the extension rod 10. Threaded grooves 12 are opened on the outer side of the extension rod 10. There are grooves 12 between the locking sleeves 11 and the connecting block 15, and between the locking sleeves 11 and the positioning ring 9. There is a movable link 16 located outside the threaded groove 12. A connecting frame 17 is installed on the outer wall of the movable link 16. One end of the connecting frame 17 is rotatably connected to a first pressing rod 18 via a rotating shaft. A first insert rod 23 extending to the inner side of the locking sleeve 11 is inserted into the outer side of the locking sleeve 11. The end of the first pressing rod 18 away from the connecting frame 17 is rotatably connected to the first insert rod 23 via a rotating shaft. One end of the first insert rod 23 is provided with a clamping plate 25 located inside the locking sleeve 11. One end of the connecting block 15 is provided with a second motor 13 located on one side of the drive rod 14 and connected to the extension rod 10.

[0021] The movable link 16 has threaded holes that match the threaded groove 12 and through holes that match the extension rod 10 on both sides. There are multiple connecting brackets 17, and the multiple connecting brackets 17 are distributed at equal distances along the center of the movable link 16. The center of the movable link 16, the center of the locking sleeve 11, and the center of the positioning rotating ring 9 are coaxial.

[0022] In this embodiment: First, the metal tube to be cut is transported to the inside of the processing chamber 2 through the conduit 3. During this process, the metal tube passes through the positioning ring 9 and is positioned inside the two locking sleeves 11. Then, the second motor 13 is started, and the second motor 13 drives the locking sleeves 11 to rotate, causing the extension rod 10 to rotate relative to the connecting block 15. This allows the movable link 16 to move along the threaded groove 12 toward the locking sleeve 11. At this time, the locking sleeve 11 is always positioned at the same location on the extension rod 10 due to the limiting and blocking effect of the baffle 22. This causes the connecting frame 17 to press the first pressing rod 18. At this time, the first pressing rod 18 will press one end of the first insert rod 23, causing the first insert rod 23 to drive the clamping plate 25 to move toward the center of the locking sleeve 11. This allows the metal tube to be cut. The tube is supported from multiple directions, so that the center of the metal tube is coaxial with the center of the locking sleeve 11. During this process, the operation of the equidistant adjustment component ensures that the laser emitter 6 and the outer wall of the metal tubes of different diameters are always kept at a fixed distance. Then, the laser emitter 6 and the first motor 5 are started. When the laser emitter 6 is operating, it processes and cuts a part of the metal tube with a laser beam. The operation of the first motor 5 causes the connecting block 15 to rotate. At this time, the connecting block 15 drives the positioning ring 9 to rotate through the extension rod 10, so that the laser beam emitted by the laser emitter 6 can perform a ring cut on the metal tube. After the cut is completed, the second motor 13 drives the extension rod 10 to rotate in the opposite direction, so that the clamping plate 25 loses its clamping limit on the metal tube, so that the section of the metal tube near the connecting block 15 falls into the processing chamber 2.

[0023] Please refer to this carefully. Figure 2 , Figure 5 , Figure 6 , Figure 7 , Figure 8The equidistant adjustment component includes a first annular chamber 7 installed inside the processing chamber 2 and located outside the positioning rotating ring 9. A second annular chamber 8 is rotatably connected to one end of the first annular chamber 7. A first guide pipe 21 is connected to the outer wall of the first annular chamber 7. A first piston cylinder 20 is provided at one end of the first guide pipe 21. A piston rod 30 extending below the first piston cylinder 20 is inserted inside the first piston cylinder 20. A laser emitter 6 is installed at the bottom end of the piston rod 30 and located below the first piston cylinder 20. Limiting frames 19 are provided on both sides of the laser emitter 6 on the outer side of the piston rod 30. A guide wheel 29 is installed at the bottom of the second annular chamber 8. A second guide pipe 27 is installed at one end of the second annular chamber 8. A second piston cylinder 26 is connected to one end of the second guide pipe 27. Connecting brackets 28 connected to the outer wall of the locking sleeve 11 are provided on both sides of the second piston cylinder 26. A piston block 32 is slidably connected to the inner side of the second piston cylinder 26. A second insert rod 31 extending to the outer side of the second piston cylinder 26 is provided at the bottom end of the piston block 32. A second pressing rod 24 is rotatably connected to one end of the second insert rod 31 through a rotating shaft. The end of the second pressing rod 24 away from the second insert rod 31 is rotatably connected to the connecting bracket 17 through a rotating shaft.

[0024] The distance from the guide wheel 29 to the center of the locking sleeve 11 is equal to the distance from the clamping plate 25 to the center of the locking sleeve 11. The second pressing rod 24 and the first pressing rod 18 are symmetrically arranged along the transverse central axis of the connecting frame 17. The diameters of the second piston cylinder 26 and the first piston cylinder 20 are equal. The distance from the guide wheel 29 to the center of the locking sleeve 11 is less than the distance from the bottom of the laser emitter 6 to the center of the locking sleeve 11.

[0025] In this embodiment: when the connecting frame 17 presses one end of the first pressing rod 18, the first pressing rod 18 will push the first insert rod 23 to move. During this process, the second insert rod 31 will also move due to the pressure of the second pressing rod 24, so that the moving distance of the second insert rod 31 and the first insert rod 23 is equal. At this time, the solution medium inside the second piston cylinder 26 will enter the second guide tube 27 through the pressure of the piston block 32. Through the second guide tube 27, the solution medium inside the first annular chamber 7 will enter the first piston cylinder 20 through the first guide tube 21, thereby... The piston rod 30 and the second insertion rod 31 move equal distances, so that the laser emitter 6 moves equal distances to the clamping plate 25. This ensures that when the clamping plate 25 contacts the outer wall of the metal tube, the guide wheel 29 also contacts the outer wall of the metal tube. Since the distance between the bottom of the laser emitter 6 and the bottom of the guide wheel 29 is fixed, the distance between the laser emitter 6 and the outer wall of metal tubes of different diameters remains constant. There is no need to adjust the position of the laser emitter 6 according to the diameter of the metal tube, simplifying operation and further improving the cutting efficiency of the equipment for metal tubes.

[0026] The following describes a method for laser cutting metal tubes, based on the aforementioned metal tube laser cutting machine, comprising the following steps: S1: First, the metal tube to be cut is transported to the inside of the processing chamber 2 through the conduit 3. During this process, the metal tube passes through the positioning ring 9 and is positioned inside the two locking sleeves 11. S2: Start the second motor 13. The second motor 13 drives the locking sleeve 11 to rotate, causing the extension rod 10 to rotate relative to the connecting block 15. This allows the movable link 16 to move along the threaded groove 12 toward the locking sleeve 11. At this time, the locking sleeve 11 is always located at the same position of the extension rod 10 due to the limiting and blocking effect of the baffle 22. This causes the connecting frame 17 to press the first pressing rod 18. At this time, the first pressing rod 18 will press one end of the first insert rod 23, causing the first insert rod 23 to drive the clamping plate 25 to move toward the center of the locking sleeve 11. This provides multi-directional support for the metal tube, making the center of the metal tube coaxial with the center of the locking sleeve 11. S3: When the connecting frame 17 presses one end of the first pressing rod 18, the first pressing rod 18 will push the first insert rod 23 to move. During this process, the second insert rod 31 will also move due to the pressure of the second pressing rod 24, so that the moving distance of the second insert rod 31 and the first insert rod 23 is equal. At this time, the solution medium inside the second piston cylinder 26 will enter the second guide tube 27 through the pressure of the piston block 32. Through the second guide tube 27, the solution medium inside the first annular chamber 7 will enter the first piston cylinder 20 through the first guide tube 21, thereby making the piston cylinder 20 more active. The moving distances of the stopper rod 30 and the second insertion rod 31 are equal, so that the moving distance of the laser emitter 6 is equal to the moving distance of the clamping plate 25. Thus, when the clamping plate 25 contacts the outer wall of the metal tube, the guide wheel 29 also contacts the outer wall of the metal tube. Since the distance between the bottom of the laser emitter 6 and the bottom of the guide wheel 29 is fixed, the distance between the laser emitter 6 and the outer wall of metal tubes of different diameters remains constant. There is no need to adjust the position of the laser emitter 6 according to the diameter of the metal tube. The operation is simple and further improves the cutting efficiency of the equipment for metal tubes. S4: Start the laser emitter 6 and the first motor 5. When the laser emitter 6 is in operation, it processes and cuts a part of the metal tube with a laser beam. The operation of the first motor 5 causes the connecting block 15 to rotate. At this time, the connecting block 15 drives the positioning ring 9 to rotate through the extension rod 10, so that the laser beam emitted by the laser emitter 6 can perform ring cutting on the metal tube. S5: After the cutting is completed, the second motor 13 drives the extension rod 10 to rotate in the opposite direction so that the clamping plate 25 loses its clamping limit on the metal tube, thereby allowing a section of the metal tube near the connecting block 15 to fall into the processing chamber 2.

[0027] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A laser cutting machine for processing metal tubes, comprising a machine body (1), characterized in that, The top of the body (1) is equipped with a processing chamber (2), and the top of the body (1) is equipped with a controller (4) located on one side of the processing chamber (2). The top of the body (1) is provided with a conduit (3) located below the controller (4). The side of the processing chamber (2) away from the controller (4) is equipped with a first motor (5). The output end of the first motor (5) is connected to a drive rod (14) located inside the processing chamber (2). One end of the drive rod (14) is provided with a limiting connector connected to the processing chamber (2). The top of the inner wall of the processing chamber (2) is provided with an equidistant adjustment member connected to the limiting connector. The inner side of the processing chamber (2) is connected to a laser emitter (6) through the equidistant adjustment member. The limiting connector includes a connecting block (15) installed at one end of the drive rod (14). Extension rods (10) are installed on both sides of the connecting block (15). One end of the extension rod (10) is provided with a positioning ring (9) that is rotatably connected to the processing chamber (2). Two locking sleeves (11) are sleeved on the outer side of the extension rod (10). The two locking sleeves (11) are symmetrically arranged along the vertical central axis of the extension rod (10). Baffles (22) located on both sides of the locking sleeves (11) are fixed on the outer side of the extension rod (10). Threaded grooves (12) are opened on the outer side of the extension rod (10). There are grooves between the locking sleeves (11) and the connecting block (15), and between the locking sleeves (11) and the positioning ring (9). A movable link (16) is provided on the outside of the threaded groove (12). A connecting frame (17) is installed on the outer wall of the movable link (16). One end of the connecting frame (17) is rotatably connected to a first pressing rod (18) via a rotating shaft. A first insert rod (23) extending to the inside of the locking sleeve (11) is inserted into the outside of the locking sleeve (11). The end of the first pressing rod (18) away from the connecting frame (17) is rotatably connected to the first insert rod (23) via a rotating shaft. One end of the first insert rod (23) is provided with a clamping plate (25) located inside the locking sleeve (11). One end of the connecting block (15) is provided with a second motor (13) located on the side of the drive rod (14) and connected to the extension rod (10).

2. The laser cutting machine for metal tube processing according to claim 1, characterized in that, The movable link (16) has threaded holes that match the threaded groove (12) and through holes that match the extension rod (10) on both sides.

3. The laser cutting machine for metal tube processing according to claim 1, characterized in that, The number of connecting frames (17) is set to multiple, and the multiple connecting frames (17) are distributed at equal distances along the center of the movable link (16).

4. A laser cutting machine for metal tube processing according to claim 1, characterized in that, The center of the movable link (16), the center of the locking sleeve (11), and the center of the positioning ring (9) are coaxial.

5. A laser cutting machine for metal tube processing according to claim 1, characterized in that, The equidistant adjustment component includes a first annular chamber (7) installed inside the processing chamber (2) and outside the positioning rotating ring (9). One end of the first annular chamber (7) is rotatably connected to a second annular chamber (8). The outer wall of the first annular chamber (7) is connected to a first guide pipe (21). One end of the first guide pipe (21) is provided with a first piston cylinder (20). A piston rod (30) extending to the bottom of the first piston cylinder (20) is inserted into the inside of the first piston cylinder (20). The laser emitter (6) is installed at the bottom end of the piston rod (30) and below the first piston cylinder (20). Limiting frames (19) located on both sides of the laser emitter (6) are provided on the outer side of the piston rod (30). 9) is equipped with a guide wheel (29) at the bottom. A second guide pipe (27) is installed at one end of the second annular chamber (8). A second piston cylinder (26) is connected to one end of the second guide pipe (27). A connecting frame (28) connected to the outer wall of the locking sleeve (11) is provided on both sides of the second piston cylinder (26). A piston block (32) is slidably connected to the inner side of the second piston cylinder (26). A second insert rod (31) extending to the outer side of the second piston cylinder (26) is provided at the bottom end of the piston block (32). A second pressing rod (24) is rotatably connected to one end of the second insert rod (31) through a rotating shaft. The end of the second pressing rod (24) away from the second insert rod (31) is rotatably connected to the connecting frame (17) through a rotating shaft.

6. A laser cutting machine for metal tube processing according to claim 5, characterized in that, The distance from the guide wheel (29) to the center of the locking sleeve (11) is equal to the distance from the clamping plate (25) to the center of the locking sleeve (11).

7. A laser cutting machine for metal tube processing according to claim 5, characterized in that, The second pressing rod (24) and the first pressing rod (18) are symmetrically arranged along the transverse central axis of the connecting frame (17).

8. A laser cutting machine for metal tube processing according to claim 5, characterized in that, The second piston cylinder (26) has the same diameter as the first piston cylinder (20).

9. A laser cutting machine for metal tube processing according to claim 5, characterized in that, The distance from the guide wheel (29) to the center of the locking sleeve (11) is less than the distance from the bottom of the laser emitter (6) to the center of the locking sleeve (11).

10. A laser cutting method for processing metal tubes, characterized in that, The metal tube processing laser cutting machine according to any one of claims 1-9 includes the following steps: S1: First, the metal tube to be cut is transported to the inside of the processing chamber (2) through the conduit fitting (3). During this process, the metal tube passes through the positioning ring (9) and is positioned inside the two locking sleeves (11). S2: Start the second motor (13). The second motor (13) drives the locking sleeve (11) to rotate, so that the extension rod (10) rotates relative to the connecting block (15). This allows the movable link (16) to move along the threaded groove (12) toward the locking sleeve (11). At this time, the locking sleeve (11) is always in the same position on the extension rod (10) due to the limiting and blocking of the baffle (22). This causes the connecting frame (17) to press the first pressing rod (18). At this time, the first pressing rod (18) will press one end of the first insert rod (23), causing the first insert rod (23) to drive the clamp (25) to move toward the center of the locking sleeve (11). This allows the metal tube to be supported in multiple directions, so that the center of the metal tube is coaxial with the center of the locking sleeve (11). S3: The laser emitter (6) and the outer wall of metal tubes of different diameters are kept at a fixed distance by the operation of the equidistant adjustment component; S4: Start the laser emitter (6) and the first motor (5). When the laser emitter (6) is in operation, it processes and cuts a part of the metal tube with the laser beam. The first motor (5) rotates the connecting block (15). At this time, the connecting block (15) drives the positioning ring (9) to rotate through the extension rod (10), so that the laser beam emitted by the laser emitter (6) can perform ring cutting on the metal tube. S5: After the cutting is completed, the second motor (13) drives the extension rod (10) to rotate in the opposite direction so that the clamping plate (25) loses its clamping limit on the metal tube, so that a section of the metal tube near the connecting block (15) falls into the processing chamber (2).

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