Fiber laser tube cutting machine and operation method

Abstract

The present invention discloses a fiber laser tube cutting machine and an operating method, the fiber laser tube cutting machine includes a machine body, a first chuck, a second chuck and a laser cutting mechanism are installed on the machine body, the first chuck and the second chuck are used to clamp the tube and can drive the tube to rotate, the machine body is fixedly connected to a pair of slide rails matching the first chuck, and also includes a fixed box, multiple straightening mechanisms and a force elimination mechanism, the straightening mechanism includes multiple hydraulic cylinders, multiple hydraulic cylinders are evenly fixed on the inner wall of the fixed box in a circular manner, and a pressure-bearing part is fixedly connected to the piston rod of the hydraulic cylinder. The fiber laser tube cutting machine and operating method of the present invention can straighten curved circular tubes, which not only reduces the scrap rate, but also prevents the tube from colliding with the laser cutting mechanism, reduces maintenance costs, and can eliminate the stress of the tube itself, prevent the tube from bending during the cutting process, and ensure cutting quality.

Description

Technical Field

[0001] The present invention belongs to the technical field of laser cutting machine equipment, and in particular relates to a fiber laser tube cutting machine and an operating method thereof. Background Art

[0002] In the field of metal processing, especially in situations where precise cutting, hole opening and grooving of pipes are required, laser pipe cutting machines are widely used due to their high efficiency and precision.

[0003] However, pipes are prone to bending during storage and hoisting before processing, especially in thin-walled round pipes. This bending can cause the holes and slots cut later to shift in position, affecting the quality of the final product. Especially when creating split holes, the rotation of the pipe driven by the chuck can cause the positional deviation of the two split holes to increase further, resulting in product scrap and significantly increasing production costs. Furthermore, bent pipes during the cutting process can collide with the laser cutting mechanism during rotation, causing damage and increasing equipment maintenance costs.

[0004] Therefore, in response to the above technical problems, it is necessary to provide a fiber laser tube cutting machine and an operating method.

[0005] The information disclosed in this background technology section is only intended to enhance understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0006] The purpose of the present invention is to provide a fiber laser tube cutting machine and an operating method, which can straighten bent round tubes, not only reducing the scrap rate, but also preventing the tubes from colliding with the laser cutting mechanism, reducing maintenance costs, and eliminating the stress of the tubes themselves, preventing the tubes from bending during the cutting process, and ensuring cutting quality.

[0007] In order to achieve the above-mentioned purpose, a specific embodiment of the present invention provides a fiber laser tube cutting machine, including a machine body, on which a first chuck, a second chuck and a laser cutting mechanism are installed, the first chuck and the second chuck are used to clamp the tube and can drive the tube to rotate, the machine body is fixedly connected to a pair of slide rails matching the first chuck, and also includes a fixed box, multiple straightening mechanisms and a force elimination mechanism, the fixed box is installed on the machine body, and a first through groove is opened on both side walls of the fixed box; the straightening mechanism includes multiple hydraulic cylinders, and the multiple hydraulic cylinders are evenly fixed on the inner wall of the fixed box in a circular manner, and the hydraulic cylinders A pressure-bearing part is fixedly connected to the piston rod of the hydraulic cylinder, and when the piston rod of the hydraulic cylinder is extended, multiple pressure-bearing parts gather together, and the multiple pressure-bearing parts can straighten the pipe after gathering; the force dissipation mechanism includes a third air pipe, one end of the third air pipe is connected to the heating part, and the end of the third air pipe away from the heating part passes through the fixed box, and the high-temperature gas emitted by the heating part is sprayed onto the straightened pipe through the third air pipe, and the heating part includes an electric heating air generator, and a fourth air pipe is fixedly connected to the electric heating air generator, and the end of the fourth air pipe away from the electric heating air generator is fixedly connected to the air cooling system of the laser cutting mechanism.

[0008] In one or more embodiments of the present invention, the pressure-bearing part includes a first pressure block and a second pressure block, the first pressure block is provided with a first groove body matching the second pressure block, the second pressure block is slidably connected to the first pressure block, an elastic bag is fixedly connected to the bottom wall of the first groove body, the elastic bag is filled with lubricating liquid, a first infusion tube and a second infusion tube are fixedly connected to the elastic bag, the first infusion tube passes through the second pressure block, and the second infusion tube is connected to a liquid supply component at one end away from the elastic bag.

[0009] In one or more embodiments of the present invention, the liquid supply assembly includes a waste liquid filter, an infusion pump is fixedly installed on the waste liquid filter, a fifth infusion tube is fixedly connected to the infusion pump, a one-way valve is installed on the fifth infusion tube, the end of the fifth infusion tube away from the infusion pump passes through a fixed box, a second annular tube matching the straightening mechanism is fixedly connected in the fixed box, multiple second annular tubes are evenly connected to the fifth infusion tube, multiple third infusion tubes are fixedly connected to the second annular tube, the third infusion tube is fixedly connected to a second corrugated tube, and the end of the second infusion tube away from the elastic bag is fixedly connected to the second corrugated tube.

[0010] In one or more embodiments of the present invention, a second slot is formed on the second pressing block, and a pressure relief valve is installed on the tube body of the first liquid infusion tube located in the second slot.

[0011] In one or more embodiments of the present invention, a first annular tube matching the straightening mechanism is fixedly connected in the fixed box, multiple first annular tubes are connected to the third air pipe, multiple second air pipes are fixedly connected to the first annular tube, the second air pipe is fixedly connected to the first corrugated tube, the first corrugated tube is fixedly connected to the first air pipe, a third trough body connected to the first air pipe is provided in the second pressure block, an injection hole is provided on the groove wall of the third trough body, and the injection hole passes through an end face of the second pressure block away from the first pressure block.

[0012] In one or more embodiments of the present invention, a fourth groove is formed on an end surface of the second pressing block away from the first pressing block, and the first liquid infusion tube and the air injection hole are both located in the fourth groove.

[0013] In one or more embodiments of the present invention, a flange plate is detachably mounted on the fixed box, a connecting pipe matching the first through groove is integrally formed on the flange plate, a scraper plate is fixedly mounted on the inner wall of the connecting pipe, a sleeve is fixedly connected to the fixed box, a through hole and a second through groove are formed on the sleeve, a connecting box matching the second through groove is fixedly connected to the sleeve, a fourth infusion tube is fixedly connected to the connecting box, and an end of the fourth infusion tube away from the connecting box is fixedly connected to the waste liquid filter.

[0014] In one or more embodiments of the present invention, the lubricating fluid is an oxalic acid solution.

[0015] In one or more embodiments of the present invention, a sliding plate is slidably connected to the slide rail, the fixed box is fixedly mounted on the sliding plate, a plurality of cylinders are fixedly mounted on the body, and a plurality of distance sensors are evenly mounted on the first through slot.

[0016] To achieve the above objectives, a specific embodiment of the present invention provides a method for operating a fiber laser tube cutting machine, comprising the following steps:

[0017] S1. Loading: Place the pipe on the machine body. The cylinder lifts up the pipe. The first chuck clamps and pushes the pipe into the straightening mechanism.

[0018] S2: Straightening: The straightening mechanism is activated, multiple hydraulic cylinders are activated, multiple second pressing blocks gather together to apply pressure to the pipe to straighten it, and the force dissipation mechanism sprays high-temperature gas. When the straightening mechanism presses the pipe to straighten it, the elastic bag is compressed and sprays lubricating fluid to reduce the friction between the second pressing blocks and the pipe;

[0019] S3. Cutting: The laser cutting mechanism emits a high-energy laser beam to cut the pipe. During the cutting process, the first chuck drives the pipe to rotate, and the lubricating fluid is evenly applied to the pipe to lubricate the pipe and clean the rust and dirt on the pipe;

[0020] S4, waste liquid recovery, each time the pipe is cut to complete a section, the first chuck pushes the pipe to move toward the laser cutting mechanism, and the waste liquid is scraped off by the scraper and enters the waste liquid filter.

[0021] Compared with the existing technology, the fiber laser tube cutting machine and operation method of the present invention can straighten bent round tubes, which not only reduces the scrap rate, but also prevents the tubes from colliding with the laser cutting mechanism, thereby reducing maintenance costs. At the same time, it can eliminate the stress of the tube itself, prevent the tube from bending during the cutting process, and ensure the cutting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments described in the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0023] Figure 1 This is a structural schematic diagram of a fiber laser tube cutting machine according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic structural diagram of a fixed box of a fiber laser tube cutting machine according to one embodiment of the present invention;

[0025] Figure 3 A cross-sectional view of a fixing box of a fiber laser tube cutting machine according to one embodiment of the present invention Figure 1 ;

[0026] Figure 4 A schematic diagram of the structure of a straightening mechanism of a fiber laser tube cutting machine in one embodiment of the present invention Figure 1 ;

[0027] Figure 5 A schematic diagram of the structure of a straightening mechanism of a fiber laser tube cutting machine in one embodiment of the present invention Figure 2 ;

[0028] Figure 6 This is a schematic diagram of the structure of a pressure-bearing part of a fiber laser tube cutting machine in one embodiment of the present invention;

[0029] Figure 7 A cross-sectional view of the pressure-bearing portion of a fiber laser tube cutting machine according to one embodiment of the present invention Figure 1 ;

[0030] Figure 8 A cross-sectional view of the pressure-bearing portion of a fiber laser tube cutting machine according to one embodiment of the present invention Figure 2 ;

[0031] Figure 9 This is a schematic structural diagram of a second pressing block of a fiber laser tube cutting machine according to one embodiment of the present invention;

[0032] Figure 10 A cross-sectional view of a fixing box of a fiber laser tube cutting machine according to one embodiment of the present invention Figure 2 ;

[0033] Figure 11 This is a schematic structural diagram of a sleeve of a fiber laser tube cutting machine according to one embodiment of the present invention;

[0034] Figure 12 This is a cross-sectional view of a connecting tube of a fiber laser tube cutting machine according to one embodiment of the present invention.

[0035] Description of main reference numerals:

[0036] 1. Machine body; 101. Slide rail; 2. First chuck; 3. Second chuck; 4. Laser cutting mechanism; 5. Sliding plate; 6. Fixed box; 601. First through slot; 7. Hydraulic cylinder; 8. First pressure block; 801. First trough; 9. Second pressure block; 901. Second trough; 902. Third trough; 903. Fourth trough; 904. Jet hole; 10. Elastic bladder; 11. First infusion tube; 111. Pressure relief valve; 12. Second infusion tube; 13. First air pipe; 14. First bellows; 15. Second Air pipe; 16. First annular tube; 17. Second corrugated tube; 18. Third infusion tube; 19. Second annular tube; 20. Sleeve; 2001. Through hole; 2002. Second through groove; 21. Connecting box; 22. Fourth infusion tube; 23. Waste liquid filter; 24. Infusion pump; 25. Fifth infusion tube; 251. One-way valve; 26. Electric heated air generator; 27. Third air pipe; 28. Fourth air pipe; 29. ​​Flange plate; 30. Connecting pipe; 31. Scraper plate; 32. Cylinder; 33. Distance sensor. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0038] like Figures 1 to 8As shown, a fiber laser tube cutting machine according to one embodiment of the present invention is used for cutting circular tubes. The machine comprises a body 1, mounted with a first chuck 2, a second chuck 3, and a laser cutting mechanism 4. The first chuck 2 and the second chuck 3 can clamp the tube and drive it to rotate, while the laser cutting mechanism 4 can move a certain distance along the X, Y, and Z axes of the body 1. During cutting, the first chuck 2, the second chuck 3, and the laser cutting mechanism 4 cooperate to perform hole-making, slotting, and severing operations on the tube.

[0039] A pair of slide rails 101 matching the first chuck 2 are welded on the machine body 1. The first chuck 2 is slidably connected to the pair of slide rails 101. After each section of the pipe is cut, the uncut part of the pipe can be sent to the bottom of the laser cutting mechanism 4 by sliding the first chuck 2 on the slide rails 101.

[0040] A fixed box 6 is installed on the machine body 1, and a first through groove 601 is opened on both side walls of the fixed box 6. A plurality of straightening mechanisms are installed on the inner wall of the fixed box 6. The pipe enters the fixed box 6 from the first through groove 601. The straightening mechanism can press the pipe part in the fixed box 6 to ensure the straightness of the pipe, prevent the hole position and slot position from deviating when the laser cutting mechanism 4 performs hole and slot operations on the pipe, and prevent the laser cutting mechanism 4 from being damaged by rotation during the pipe cutting process.

[0041] The straightening mechanism includes multiple hydraulic cylinders 7, which are evenly welded on the inner wall of the fixed box 6 in a circular manner. A pressure-bearing part is welded on the piston rod of the hydraulic cylinder 7. When the piston rod of the hydraulic cylinder 7 is extended, the multiple pressure-bearing parts gather together. After the multiple pressure-bearing parts gather together, they can straighten the pipe.

[0042] It should be noted that the total length of the straightened portion of the pipe each time by the multiple straightening mechanisms in the fixed box 6 is greater than the length of each section of the pipe being cut. In other words, the straightness of the pipe portion sent to the bottom of the laser cutting mechanism 4 by the first chuck 2 is always qualified.

[0043] It is worth noting that some pipes that have been bent for a long time will generate internal stress when they are straightened again, and the pipes may bend again when they are cut. Therefore, a force dissipation mechanism is installed on the fixing box 6 to eliminate the stress in the pipe body.

[0044] Specifically, the force dissipation mechanism includes a third air pipe 27, one end of the third air pipe 27 is connected to the heating part, and the end of the third air pipe 27 away from the heating part passes through the fixed box 6. The high-temperature gas emitted by the heating part is sprayed onto the straightened pipe through the third air pipe 27, which not only eliminates the stress in the pipe but also preheats the pipe to prevent the pipe from deforming during the cutting process, thereby improving the cutting quality.

[0045] The heating unit includes an electrically heated air generator 26, to which a fourth air pipe 28 is welded. The end of the fourth air pipe 28, away from the electrically heated air generator 26, is connected by a clamp to the air cooling system of the laser cutting mechanism 4. The laser cutting mechanism 4 generates a large amount of heat during operation. The air cooling system transfers this heat to the electrically heated air generator 26 through the fourth air pipe 28, significantly reducing the energy consumption of the electrically heated air generator 26 and lowering cutting costs.

[0046] It's worth noting that when eliminating internal stress in the pipe, the pressure-bearing portion of the straightening mechanism must be in close contact with the pipe surface to prevent bending and deformation when heated, ensuring the pipe's straightness. However, because the pipe rotates during cutting, the pressure-bearing portion is in close contact with the pipe's outer wall, creating significant friction between the outer wall and the pressure-bearing portion. This high friction can affect the pipe's rotation during cutting.

[0047] In order to solve the above problems, Figures 3 to 8 As shown, the pressure-bearing portion includes a first pressing block 8 and a second pressing block 9. The first pressing block 8 defines a first groove 801 that matches the second pressing block 9. The second pressing block 9 is slidably connected to the first pressing block 8. An elastic bladder 10 is bonded to the bottom wall of the first groove 801, which contains lubricating fluid. A first infusion tube 11 and a second infusion tube 12 are bonded to and communicate with the interior of the elastic bladder 10. The first infusion tube 11 passes through the second pressing block 9, and the second infusion tube 12, located away from the elastic bladder 10, is connected to a liquid supply assembly.

[0048] Specifically, as the piston rod of the hydraulic cylinder 7 gradually extends, the first pressing block 8 and the second pressing block 9 gradually approach the pipe. The second pressing block 9 will contact the outer wall of the pipe and gradually slide into the first groove 801. When the pair of wings of the second pressing block 9 fits on the first pressing block 8, the second pressing block 9 can no longer slide into the first groove 801, and the second pressing block 9 can straighten the pipe. At this time, the second pressing block 9 compresses the elastic sac 10 during its sliding into the first groove 801. The lubricating fluid in the elastic sac 10 is sprayed onto the outer wall of the pipe from the first infusion tube 11, which can greatly reduce the friction between the second pressing block 9 and the pipe, so that it will not affect the rotation during the pipe cutting process.

[0049] It is worth noting that when the pair of wing plates of the second pressing block 9 fits with the first pressing block 8 , there is still some space inside the first groove 801 to prevent the elastic bag 10 from being crushed.

[0050] The liquid supply assembly includes a waste liquid filter 23, to which is fixedly mounted an infusion pump 24. A fifth infusion tube 25 is welded to the infusion pump 24. The end of the fifth infusion tube 25, away from the infusion pump 24, extends through the fixed box 6. A first bracket (not shown) is welded to the opposite inner wall of the fixed box 6. A second annular tube 19, which matches the straightening mechanism, is welded to the first bracket. One end of the fifth infusion tube 25 extends through the fixed box 6 and communicates with multiple second annular tubes 19. Multiple third infusion tubes 18 are welded to the second annular tube 19. The third infusion tubes 18 are clamped to the second bellows 17. The end of the second infusion tube 12, away from the elastic bladder 10, is clamped to the second bellows 17.

[0051] Specifically, the lubricating liquid in the waste liquid filter 23 is extracted by the infusion pump 24 and delivered to the elastic bladder 10 through the fifth infusion tube 25, the second annular tube 19, the third infusion tube 18, the second bellows 17, and the second infusion tube 12. When the second infusion tube 12 follows the movement of the first pressing block 8, the second bellows 17 can extend or contract, thereby maintaining communication between the second annular tube 19 and the second infusion tube 12.

[0052] Furthermore, a one-way valve 251 is installed on the fifth liquid infusion tube 25 . When the elastic bag 10 is compressed by the second pressing block 9 , the one-way valve 251 can prevent the lubricating liquid in the elastic bag 10 from flowing back into the waste liquid filter 23 .

[0053] Furthermore, a second groove 901 is formed on the second pressing block 9, and a pressure relief valve 111 is installed on the tube body of the first infusion tube 11 located in the second groove 901. The pressure relief valve 111 can prevent the lubricating liquid in the elastic bladder 10 from flowing out of the tube opening of the first infusion tube 11 due to gravity. When the elastic bladder 10 is compressed by the second pressing block 9, the pressure in the elastic bladder 10 increases, the pressure relief valve 111 will open, and the lubricating liquid in the elastic bladder 10 can be sprayed out of the tube opening of the first infusion tube 11.

[0054] Preferably, the lubricant is an oxalic acid solution. During long-term storage of pipes, the pipe wall will rust, and rust will affect the cutting quality. When the oxalic acid solution is applied to the outer wall of the pipe, it forms a temporary lubricating film and also undergoes a reduction reaction with the rust. Since the main component of rust is ferric oxide, the oxalic acid solution can cause the ferric oxide to form a soluble complex, dissolving and peeling the rust from the pipe, thereby achieving a rust removal effect. In addition, the oxalic acid solution can also remove dirt and oil stains on the surface of the pipe, preventing the generation of large amounts of thick smoke when the pipe is cut.

[0055] like Figures 2 to 9As shown, to uniformly heat the straightened pipe and shorten the time it takes to eliminate internal stress, a second bracket (not shown) is welded to the fixing box 6. A first annular tube 16 matching the straightening mechanism is welded to the second bracket. A third air pipe 27 is connected to multiple first annular tubes 16. Multiple second air pipes 15 are welded to the first annular tube 16. The second air pipes 15 are clamped to the first bellows 14, which are clamped to the first bellows 14. The first bellows 14 are clamped to the first air pipe 13. A third slot 902 is defined within the second pressing block 9 and communicates with the first air pipe 13. An air jet hole 904 is defined in the wall of the third slot 902. The air jet hole 904 extends through the end face of the second pressing block 9 facing away from the first pressing block 8.

[0056] Specifically, the high-temperature gas output by the electrically heated air generator 26 enters the third tank 902 through the second liquid delivery tube 12. It is then evenly sprayed onto the surface of the pipe through the air jet holes 904, heating the pipe and eliminating its internal stress. Furthermore, the high-temperature gas entering the third tank 902 raises the temperature of the second pressing block 9, further facilitating heating of the pipe and shortening the time required to eliminate internal stress.

[0057] Furthermore, a fourth groove 903 is formed on an end surface of the second pressing block 9 away from the first pressing block 8 , and the first liquid delivery tube 11 and the air injection hole 904 are both located in the fourth groove 903 .

[0058] Specifically, when the second pressing block 9 is pressed on the outer wall of the pipe, the pipe will block the fourth trough 903, and the oxalic acid solution sprayed from the first infusion tube 11 will be in the fourth trough 903, and can be evenly applied to the outer wall of the pipe as the pipe rotates. The high-temperature gas sprayed from the air jet 904 heats the pipe while also heating the oxalic acid solution, thereby enhancing the rust removal effect of the oxalic acid solution on the pipe.

[0059] like Figure 1 、 Figure 3 、 Figure 11 and Figure 12 As shown, a flange plate 29 is bolted to the fixed box 6. A connecting tube 30 is integrally formed on the flange plate 29, matching the first through-slot 601. A liquid scraper 31 matching the outer diameter of the tube is bonded to the inner wall of the connecting tube 30. A sleeve 20 is welded to the inner wall of the fixed box 6. The sleeve 20 has a through-hole 2001 and a second through-slot 2002. A connecting box 21 matching the second through-slot 2002 is welded to the sleeve 20. A fourth liquid infusion tube 22 is welded to the connecting box 21. The end of the fourth liquid infusion tube 22, away from the connecting box 21, is plugged into a waste liquid filter 23.

[0060] Specifically, through-hole 2001 matches the piston rod of hydraulic cylinder 7, which passes through through-hole 2001. Both first and second pressing blocks 8 and 9 are located within sleeve 20. After a section of the tubing is cut, first chuck 2 slides on rail 101 toward laser cutting mechanism 4, and the tubing within fixed box 6 also moves toward laser cutting mechanism 4. As the tubing slides out of fixed box 6, scraper 31 scrapes off the oxalic acid solution on the tubing's outer wall. The scraped oxalic acid solution then flows into connection box 21 and is then extracted and filtered by waste liquid filter 23 for recycling.

[0061] Preferably, the scraper 31 is a polytetrafluoroethylene plate. Polytetrafluoroethylene plates have strong corrosion resistance and are not corroded by the oxalic acid solution. Almost all substances do not easily adhere to their surface, and the oxalic acid solution scraped off can flow into the connection box 21 through the surface of the scraper 31. Furthermore, the polytetrafluoroethylene plate has an extremely low coefficient of friction and does not affect the rotation of the pipe during cutting or the movement of the pipe toward the laser cutting mechanism 4.

[0062] like Figures 1 to 5 As shown, a sliding plate 5 is slidably connected to the slide rail 101 , a fixed box 6 is fixedly mounted on the sliding plate 5 , a plurality of cylinders 32 are fixedly mounted on the body 1 , and a plurality of distance sensors 33 are evenly mounted on the first through slot 601 .

[0063] Before cutting, place the pipe on the machine body 1, and the cylinder 32 can lift the pipe to a height that matches the first chuck 2. At this time, the first chuck 2 and the sliding plate 5 slide on the slide rail 101 at the same time and approach each other. While the first chuck 2 clamps the pipe, the piston rod of the hydraulic cylinder 7 is lifted, so that the second pressure block 9 lifts the pipe. Then the first chuck 2 and the sliding plate 5 slide together toward the direction of the laser cutting mechanism 4, so that the pipe passes through the second chuck 3, ensuring that the pipe can be under the laser cutting mechanism 4. At this time, the second chuck 3 also clamps the pipe.

[0064] After the first and second chucks 2 and 3 clamp the tubing, the piston rod of the hydraulic cylinder 7 descends, and the sliding plate 5 moves on the slide rail 101. Multiple distance sensors 33 detect the tubing and measure the distance between them and the tubing's outer wall. If the distances between the multiple distance sensors 33 and the tubing's outer wall are equal, the tubing is not bent, and the straightening mechanism will not operate, reducing energy consumption. If the tubing is bent at any point, the sliding plate 5 will stop at a position that matches the bend, and the straightening mechanism will press the bend into place.

[0065] In addition, during the process of cutting the pipe, when the first chuck 2 drives the pipe to move horizontally on the slide rail 101, the sliding plate 5 drives the fixed box 6 to make the same movement to prevent horizontal friction between the pipe and the second pressing block 9. In this way, during the process of drilling, grooving and cutting the pipe, the pipe can be straightened, and the internal stress of the pipe is also eliminated. At the same time, the pipe is preheated, which effectively ensures the cutting efficiency of the pipe.

[0066] During use, the laser cutting mechanism 4 cuts the pipe while the straightening mechanism straightens the portion of the pipe to be cut. As the first and second chucks 2 and 3 drive the pipe to rotate, the force dissipation mechanism sprays high-temperature gas evenly onto the straightened pipe, eliminating internal stress in the straightened pipe and preventing it from bending again. It also preheats the pipe and improves cutting quality.

[0067] A fiber laser tube cutting machine operating method includes the following steps:

[0068] S1. Loading: Place the pipe on the machine body 1. The cylinder 32 lifts the pipe upward. The first chuck 2 clamps and pushes the pipe into the straightening mechanism.

[0069] S2: Straightening. The straightening mechanism is activated, multiple hydraulic cylinders 7 are activated, multiple second pressing blocks 9 gather together to apply pressure to the pipe to straighten it, and the force dissipation mechanism sprays high-temperature gas. When the straightening mechanism straightens the pipe, the elastic bag 10 is compressed and sprays lubricating fluid to reduce the friction between the second pressing blocks 9 and the pipe;

[0070] S3, cutting, the laser cutting mechanism 4 emits a high-energy laser beam to cut the pipe. During the cutting process, the first chuck 2 drives the pipe to rotate, and the lubricating liquid is evenly applied to the pipe to lubricate the pipe and clean the rust and dirt on the pipe;

[0071] S4, waste liquid recovery. After each section of the pipe is cut, the first chuck 2 pushes the pipe toward the laser cutting mechanism 4 , and the waste liquid is scraped off by the scraper 31 and enters the waste liquid filter 23 .

[0072] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0073] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A fiber laser tube cutting machine, comprising a machine body, on which are mounted a first chuck, a second chuck, and a laser cutting mechanism, wherein the first chuck and the second chuck are used to clamp the tube and drive the tube to rotate, and a pair of slide rails matching the first chuck are fixedly connected to the machine body, characterized in that: Also includes: A fixed box, the fixed box being mounted on the machine body, and having first through slots formed on both side walls of the fixed box; Multiple straightening mechanisms, each comprising a plurality of hydraulic cylinders, each of which is evenly fixed in a circular pattern on the inner wall of a fixed box, each of which has a pressure-bearing portion fixedly connected to its piston rod. When the piston rod of the hydraulic cylinder is extended, the plurality of pressure-bearing portions converge to press the pipe straight. A force dissipation mechanism, the force dissipation mechanism including a third air pipe, one end of the third air pipe being connected to a heating unit, the end of the third air pipe away from the heating unit passing through a fixed box, the high-temperature gas emitted by the heating unit being sprayed onto the straightened pipe through the third air pipe, the heating unit including an electric heated air generator, the electric heated air generator being fixedly connected to a fourth air pipe, the end of the fourth air pipe away from the electric heated air generator being fixedly connected to an air cooling system of the laser cutting mechanism; The pressure-bearing portion includes a first pressing block and a second pressing block, the first pressing block is provided with a first groove body matching the second pressing block, the second pressing block is slidably connected to the first pressing block, an elastic bag is fixedly connected to the bottom wall of the groove body of the first groove body, the elastic bag is filled with lubricating liquid, and a first infusion tube and a second infusion tube are fixedly connected to the elastic bag, the first infusion tube passes through the second pressing block, and the end of the second infusion tube away from the elastic bag is connected to the liquid supply component; The liquid supply assembly includes a waste liquid filter, an infusion pump is fixedly mounted on the waste liquid filter, a fifth infusion tube is fixedly connected to the infusion pump, a one-way valve is mounted on the fifth infusion tube, an end of the fifth infusion tube away from the infusion pump passes through a fixed box, a second annular tube matching the straightening mechanism is fixedly connected inside the fixed box, a plurality of the second annular tubes are evenly connected to the fifth infusion tube, a plurality of third infusion tubes are fixedly connected to the second annular tube, a second corrugated tube is fixedly connected to the third infusion tube, and an end of the second infusion tube away from the elastic bag is fixedly connected to the second corrugated tube; A first annular tube matching the straightening mechanism is fixedly connected in the fixed box, a plurality of the first annular tubes are connected to the third air pipe, a plurality of second air pipes are fixedly connected to the first annular tube, a first corrugated tube is fixedly connected to the second air pipe, the first corrugated tube is fixedly connected to the first air pipe, a third slot body connected to the first air pipe is provided in the second pressing block, an air jet hole is provided on the slot wall of the third slot body, and the air jet hole passes through an end face of the second pressing block away from the first pressing block; A flange plate is detachably mounted on the fixed box, a connecting pipe matching the first through-slot is integrally formed on the flange plate, a scraper plate is fixedly mounted on the inner wall of the connecting pipe, a sleeve is fixedly connected to the fixed box, a through hole and a second through-slot are formed on the sleeve, a connecting box matching the second through-slot is fixedly connected to the sleeve, a fourth infusion tube is fixedly connected to the connecting box, and one end of the fourth infusion tube away from the connecting box is fixedly connected to the waste liquid filter.

2. The fiber laser tube cutting machine according to claim 1, characterized in that: A second slot is provided on the second pressing block, and a pressure relief valve is installed on the tube body of the first liquid infusion tube located in the second slot.

3. The fiber laser tube cutting machine according to claim 1, characterized in that: A fourth slot is provided on an end surface of the second pressing block away from the first pressing block, and the first liquid delivery tube and the air injection hole are both located in the fourth slot.

4. The fiber laser tube cutting machine according to claim 1, characterized in that: The lubricating liquid is oxalic acid solution.

5. The fiber laser tube cutting machine according to any one of claims 1 to 4, characterized in that: A sliding plate is slidably connected to the slide rail, the fixed box is fixedly mounted on the sliding plate, a plurality of cylinders are fixedly mounted on the machine body, and a plurality of distance sensors are evenly mounted on the first through slot.

6. A method for operating a fiber laser tube cutting machine according to claim 1, characterized in that: The following steps are involved: S1. Loading: Place the pipe on the machine body. The cylinder lifts up the pipe. The first chuck clamps and pushes the pipe into the straightening mechanism. S2: Straightening: The straightening mechanism is activated, multiple hydraulic cylinders are activated, multiple second pressing blocks gather together to apply pressure to the pipe to straighten it, and the force dissipation mechanism sprays high-temperature gas. When the straightening mechanism presses the pipe to straighten it, the elastic bag is compressed and sprays lubricating fluid to reduce the friction between the second pressing blocks and the pipe; S3. Cutting: The laser cutting mechanism emits a high-energy laser beam to cut the pipe. During the cutting process, the first chuck drives the pipe to rotate, and the lubricating fluid is evenly applied to the pipe to lubricate the pipe and clean the rust and dirt on the pipe; S4, waste liquid recovery, each time the pipe is cut to complete a section, the first chuck pushes the pipe to move toward the laser cutting mechanism, and the waste liquid is scraped off by the scraper and enters the waste liquid filter.

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