Fiber laser pipe cutting machine and operation method

Abstract

The invention discloses an optical fiber laser pipe cutting machine and an operation method.The optical fiber laser pipe cutting machine comprises a machine body, a first chuck, a second chuck and a laser cutting mechanism are installed on the machine body, and the first chuck and the second chuck are used for clamping a pipe and can drive the pipe to rotate; the machine body is fixedly connected with a pair of sliding rails matched with the first chucks, the straightening machine further comprises a fixing box, a plurality of straightening mechanisms and a force eliminating mechanism, each straightening mechanism comprises a plurality of hydraulic cylinders, the hydraulic cylinders are circumferentially and evenly fixed to the inner wall of the fixing box, and piston rods of the hydraulic cylinders are fixedly connected with pressure bearing parts. According to the optical fiber laser pipe cutting machine and the operation method, bent circular pipes can be pressed to be straight, the rejection rate is reduced, the pipes can be prevented from colliding with the laser cutting mechanism, the maintenance cost is reduced, meanwhile, the stress of the pipes can be eliminated, the pipes are prevented from being bent in the cutting process, and the cutting quality is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of laser cutting machine equipment, and particularly relates to an optical fiber laser pipe cutting machine and an operation method thereof. Background Art

[0002] In the field of metal processing, especially in the occasions 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, the pipes are prone to bending during the storage, hoisting and other links before processing. Especially for thin-walled circular pipes, the bending phenomenon is particularly significant. This kind of bending will cause the positions of the subsequent cut holes and grooves to shift, thus affecting the quality of the final product. Especially when opening opposite holes, after the chuck drives the pipe to rotate, the deviation of the position degree of the two opposite holes will be further increased, which will cause the product to be scrapped and greatly increase the production cost. In addition, during the cutting process, the bent pipe will collide with the laser cutting mechanism when rotating, resulting in damage to the laser cutting mechanism and increasing the equipment maintenance cost.

[0004] Therefore, in view of the above technical problems, it is necessary to provide an optical fiber laser pipe cutting machine and an operation method thereof.

[0005] The information disclosed in this background art section is only for enhancing the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of implication that this information constitutes the prior art already known to those of ordinary skill in the art. Summary of the Invention

[0006] The purpose of the present invention is to provide an optical fiber laser pipe cutting machine and an operation method thereof, which can straighten the bent circular pipes, not only reduce the scrap rate, but also prevent the pipes from colliding with the laser cutting mechanism, reduce the maintenance cost, and at the same time can eliminate the stress of the pipes themselves, prevent the pipes from bending during the cutting process, and ensure the cutting quality.

[0007] To achieve the above object, a fiber laser pipe cutting machine provided by a specific embodiment of the present invention includes 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 pipe and can drive the pipe to rotate. A pair of slide rails matching the first chuck are fixedly connected to the machine body. The machine body also includes a fixed box, a plurality of straightening mechanisms and a damping mechanism. The fixed box is installed on the machine body, and first through grooves are opened on both side walls of the fixed box. The straightening mechanism includes a plurality of hydraulic cylinders, which are evenly fixed on the inner wall of the fixed box in a circumferential manner. A pressure-bearing part is fixedly connected to the piston rod of the hydraulic cylinder. When the piston rod of the hydraulic cylinder extends, a plurality of pressure-bearing parts gather together, and the pipe can be straightened after the plurality of pressure-bearing parts gather. The damping mechanism includes a third air pipe, one end of which is communicated with a heat supply part. The third air pipe penetrates through the fixed box at the end far away from the heat supply part. The high-temperature gas emitted by the heat supply part is sprayed on the straightened pipe through the third air pipe. The heat supply part includes an electric heating air generator, and a fourth air pipe is fixedly connected to the electric heating air generator. The end of the fourth air pipe far 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 pressing block and a second pressing block. A first groove body matching the second pressing block is opened on the first pressing block. The second pressing block is slidably connected to the first pressing block. An elastic capsule is fixedly connected to the bottom wall of the first groove body. The elastic capsule is filled with lubricating fluid. A first infusion pipe and a second infusion pipe are fixedly connected to the elastic capsule. The first infusion pipe penetrates through the second pressing block, and the end of the second infusion pipe far away from the elastic capsule is connected to a liquid supply component.

[0009] In one or more embodiments of the present invention, the liquid supply component includes a waste liquid filter, on which an infusion pump is fixedly installed. A fifth infusion pipe is fixedly connected to the infusion pump. A one-way valve is installed on the fifth infusion pipe. The end of the fifth infusion pipe far away from the infusion pump penetrates through the fixed box. A second annular pipe matching the straightening mechanism is fixedly connected in the fixed box. A plurality of the second annular pipes are evenly communicated with the fifth infusion pipe. A plurality of third infusion pipes are fixedly connected to the second annular pipe. A second corrugated pipe is fixedly connected to the third infusion pipe. The end of the second infusion pipe far away from the elastic capsule is fixedly connected to the second corrugated pipe.

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

[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 a first corrugated tube, the first corrugated tube is fixedly connected to the first air pipe, a third groove body connected to the first air pipe is provided in the second pressing block, an injection hole is provided on the groove wall of the third groove body, and the injection hole passes through an end face of the second pressing block away from the first pressing block.

[0012] In one or more embodiments of the present invention, a fourth slot 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 slot.

[0013] In one or more embodiments of the present invention, a flange plate is detachably mounted on the fixed box, a connecting tube 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 tube, 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 liquid 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 groove.

[0016] In order to achieve the above object, a specific embodiment of the present invention provides an operation method of a fiber laser tube cutting machine, comprising the following steps: S1, loading, placing the pipe on the machine body, the cylinder lifts up the pipe, the first chuck clamps and pushes the pipe to make it enter the straightening mechanism; S2, straightening, the straightening mechanism is started, multiple hydraulic cylinders are started, multiple second pressing blocks gather together to apply pressure to the pipe to straighten the pipe, the force dissipation mechanism sprays high-temperature gas, and when the straightening mechanism presses the pipe to straighten, 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 liquid is evenly applied to the pipe to lubricate the pipe and clean the rust and dirt on the pipe; S4. Waste liquid recovery: During the process that the first chuck pushes the pipe towards the laser cutting mechanism after each section of the pipe is cut, the waste liquid is scraped off by the scraping plate and enters the waste liquid filter.

[0017] Compared with the prior art, the fiber laser pipe cutting machine and its operation method of the present invention can straighten the bent circular pipe, which not only reduces the rejection rate, but also prevents the pipe from colliding with the laser cutting mechanism, reduces the maintenance cost, eliminates the stress of the pipe itself, prevents the pipe from bending during the cutting process, and ensures the cutting quality. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 Structural schematic diagram of a fiber laser pipe cutting machine in an embodiment of the present invention; Figure 2 Structural schematic diagram of the fixed box of a fiber laser pipe cutting machine in an embodiment of the present invention; Figure 3 Cross-section of the fixed box of a fiber laser pipe cutting machine in an embodiment of the present invention Figure 1 ; Figure 4 Structural schematic diagram of the straightening mechanism of a fiber laser pipe cutting machine in an embodiment of the present invention Figure 1 ; Figure 5 Structural schematic diagram of the straightening mechanism of a fiber laser pipe cutting machine in an embodiment of the present invention Figure 2 ; Figure 6 Mechanism schematic diagram of the pressure-bearing part of a fiber laser pipe cutting machine in an embodiment of the present invention; Figure 7 Cross-section of the pressure-bearing part of a fiber laser pipe cutting machine in an embodiment of the present invention Figure 1 ; Figure 8 Cross-section of the pressure-bearing part of a fiber laser pipe cutting machine in an embodiment of the present invention Figure 2 ; Figure 9 Structural schematic diagram of the second pressing block of a fiber laser pipe cutting machine in an embodiment of the present invention; Figure 10 Cross-section of the fixed box of a fiber laser pipe cutting machine in an embodiment of the present invention Figure 2 ; Figure 11 Schematic structural diagram of a sleeve of a fiber laser pipe cutting machine in an embodiment of the present invention; Figure 12 Cross-sectional view of a connecting pipe of a fiber laser pipe cutting machine in an embodiment of the present invention.

[0020] Description of main reference numerals: 1. Machine body; 101. Slide rail; 2. First chuck; 3. Second chuck; 4. Laser cutting mechanism; 5. Slide plate; 6. Fixed box; 601. First through groove; 7. Hydraulic cylinder; 8. First pressing block; 801. First groove; 9. Second pressing block; 901. Second groove; 902. Third groove; 903. Fourth groove; 904. Air injection hole; 10. Elastic capsule; 11. First infusion tube; 111. Pressure relief valve; 12. Second infusion tube; 13. First air tube; 14. First corrugated tube; 15. Second air tube; 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. Connection box; 22. Fourth infusion tube; 23. Waste liquid filter; 24. Infusion pump; 25. Fifth infusion tube; 251. Check valve; 26. Electric heating air generator; 27. Third air tube; 28. Fourth air tube; 29. Flange plate; 30. Connecting pipe; 31. Liquid scraping plate; 32. Cylinder; 33. Distance sensor. Detailed implementation manners

[0021] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0022] As Figures 1 to 8 shown, a fiber laser pipe cutting machine in an embodiment of the present invention is used for cutting circular pipes, and it includes a machine body 1, on which a first chuck 2, a second chuck 3 and a laser cutting mechanism 4 are installed. Among them, the first chuck 2 and the second chuck 3 can clamp the pipe and drive the pipe to rotate, and the laser cutting mechanism 4 can travel a certain distance on the X, Y and Z axes of the machine body 1. During cutting, the first chuck 2, the second chuck 3 and the laser cutting mechanism 4 cooperate with each other to realize operations such as opening holes, grooving and cutting off the pipe.

[0023] 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 under the laser cutting mechanism 4 by the sliding of the first chuck 2 on the slide rails 101.

[0024] A fixed box 6 is installed on the machine body 1. First through grooves 601 are 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 grooves 601. The straightening mechanisms can straighten the part of the pipe in the fixed box 6, ensure the straightness of the pipe, prevent the deviation of the hole position and slot position when the laser cutting mechanism 4 performs hole opening and grooving operations on the pipe, and at the same time prevent the rotation of the pipe during the cutting process from damaging the laser cutting mechanism 4.

[0025] The straightening mechanisms include a plurality of hydraulic cylinders 7. The plurality of hydraulic cylinders 7 are welded on the inner wall of the fixed box 6 in a circumferential and uniform manner. A pressure-bearing part is welded on the piston rod of the hydraulic cylinder 7. When the piston rods of the hydraulic cylinders 7 extend, the plurality of pressure-bearing parts gather together, and the pipe can be straightened after the plurality of pressure-bearing parts gather together.

[0026] It should be noted that the total length of the straightening part of the pipe by the plurality of straightening mechanisms in the fixed box 6 each time is greater than the length of each section of the pipe being cut. That is to say, the straightness of the pipe part sent under the laser cutting mechanism 4 by the first chuck 2 each time is qualified.

[0027] It is worth noting that after some pipes that have been bent for a long time are straightened again, internal stress will be generated inside the pipes, and the pipes may bend again during cutting. Therefore, a stress-relieving mechanism for eliminating the internal stress of the pipes is installed on the fixed box 6.

[0028] Specifically, the stress-relieving mechanism includes a third air pipe 27. One end of the third air pipe 27 is communicated with a heat supply part. The end of the third air pipe 27 far from the heat supply part penetrates the fixed box 6. The high-temperature gas emitted by the heat supply part is sprayed on the straightened pipe through the third air pipe 27, eliminating the internal stress of the pipe and preheating the pipe at the same time, preventing the pipe from deforming during cutting, thereby improving the cutting quality.

[0029] Among them, the heat supply part includes an electric heating air generator 26. A fourth air pipe 28 is welded on the electric heating air generator 26. The end of the fourth air pipe 28 far from the electric heating air generator 26 is clamped and connected to the air cooling system of the laser cutting mechanism 4. A large amount of heat is generated when the laser cutting mechanism 4 works. The air cooling mechanism transports this heat to the electric heating air generator 26 through the fourth air pipe 28, which can greatly reduce the energy consumption of the electric heating air generator 26 and reduce the cutting cost.

[0030] It should be noted that when eliminating the internal stress of the pipe, the pressure-bearing part on the straightening mechanism needs to fit on the surface of the pipe to prevent the pipe from bending and deforming when heated, and to ensure the straightness of the pipe. However, because the pipe needs to rotate during the cutting process, the pressure-bearing part is then in contact with the outer wall of the pipe, and the friction between the outer wall of the pipe and the pressure-bearing part is relatively large. This large frictional force will affect the rotation of the pipe during cutting.

[0031] To solve the above problems, as Figures 3 to 8 shown, the pressure-bearing part includes a first pressing block 8 and a second pressing block 9. A first groove 801 matching the second pressing block 9 is formed on the first pressing block 8. The second pressing block 9 is slidably connected to the first pressing block 8. An elastic bladder 10 is adhesively bonded to the bottom wall of the first groove 801, and a lubricating fluid is contained in the elastic bladder 10. A first infusion tube 11 and a second infusion tube 12 communicating with the inside thereof are adhesively bonded to the elastic bladder 10. The first infusion tube 11 penetrates through the second pressing block 9, and one end of the second infusion tube 12 away from the elastic bladder 10 is connected to a liquid supply assembly.

[0032] 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 a pair of wing plates of the second pressing block 9 fit 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, during the process of the second pressing block 9 sliding into the first groove 801, the elastic bladder 10 will be compressed, and the lubricating fluid in the elastic bladder 10 is sprayed on the outer wall of the pipe from the first infusion tube 11, which can greatly reduce the frictional force between the second pressing block 9 and the pipe, so that the rotation during the pipe cutting process will not be affected.

[0033] It should be noted that when a pair of wing plates of the second pressing block 9 fit on the first pressing block 8, there is still some space inside the first groove 801 to prevent the elastic bladder 10 from being damaged.

[0034] The liquid supply assembly includes a waste liquid filter 23. An infusion pump 24 is fixedly installed on the waste liquid filter 23. A fifth infusion tube 25 is welded to the infusion pump 24. One end of the fifth infusion tube 25 away from the infusion pump 24 penetrates through the fixed box 6. A first bracket (not shown in the figure) is welded on the opposite inner walls of the fixed box 6. A second annular tube 19 matching the straightening mechanism is welded on the first bracket. One end of the fifth infusion tube 25 penetrating through the fixed box 6 communicates with a plurality of second annular tubes 19. A plurality of third infusion tubes 18 are welded to the second annular tube 19. A second corrugated tube 17 is connected to the third infusion tube 18 by a clamp. One end of the second infusion tube 12 away from the elastic bladder 10 is connected to the second corrugated tube 17 by a clamp.

[0035] Specifically, the lubricating fluid in the waste liquid filter 23 is extracted by the infusion pump 24 and is transported into the elastic bladder 10 after passing through the fifth infusion tube 25, the second annular tube 19, the third infusion tube 18, the second corrugated tube 17, and the second infusion tube 12. When the second infusion tube 12 moves following the first pressing block 8, the second corrugated tube 17 can elongate or shorten, so that the second annular tube 19 and the second infusion tube 12 remain connected.

[0036] Furthermore, a one-way valve 251 is installed on the fifth infusion tube 25. When the elastic bladder 10 is compressed by the second pressing block 9, the one-way valve 251 can prevent the lubricating fluid in the elastic bladder 10 from flowing back into the waste liquid filter 23.

[0037] Even further, 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 fluid in the elastic bladder 10 from flowing out of the pipe orifice of the first infusion tube 11 due to gravity. When the elastic bladder 10 is compressed by the second pressing block 9, the pressure inside the elastic bladder 10 increases, and the pressure relief valve 111 will open, and the lubricating fluid in the elastic bladder 10 can be ejected from the pipe orifice of the first infusion tube 11.

[0038] Preferably, the lubricating fluid is an oxalic acid solution. During the long-term storage of the pipe, the pipe wall will rust, and the rust will affect the cutting quality. When the oxalic acid solution is applied to the outer wall of the pipe, while forming a temporary lubricating film, it will also undergo a reduction reaction with the rust. Since the main component of the rust is iron oxide, the oxalic acid solution can form a soluble complex with the iron oxide, dissolve and peel the rust from the pipe, thereby achieving the rust removal effect. In addition, the oxalic acid solution can also remove the dirt and oil stains on the pipe surface, preventing a large amount of thick smoke from occurring when the pipe is cut. As Figures 2 to 9 shown, in order to uniformly heat the straightened pipe and shorten the time for eliminating the internal stress of the pipe, a second bracket (not shown in the figure) is welded in the fixed box 6, and a first annular tube 16 matching the straightening mechanism is welded on the second bracket. The third air tube 27 is connected to a plurality of first annular tubes 16. A plurality of second air tubes 15 are welded on the first annular tube 16. A first corrugated tube 14 is connected to the second air tube 15 by a clamp, and a first air tube 13 is connected to the first corrugated tube 14 by a clamp. A third groove 902 communicating with the first air tube 13 is formed in the second pressing block 9, and air injection holes 904 are formed on the groove wall of the third groove 902, and the air injection holes 904 penetrate through the end face of the second pressing block 9 away from the first pressing block 8.

[0039] Specifically, the high-temperature gas output by the electric heating air generator 26 passes through the second infusion tube 12 and enters the third tank body 902, and then is evenly sprayed on the surface of the pipe through the spray holes 904 to heat the pipe and eliminate the internal stress of the pipe. In addition, the high-temperature gas entering the third tank body 902 can also increase the self-temperature of the second pressing block 9, which is more conducive to heating the pipe and shortening the time for the pipe to eliminate internal stress.

[0040] Further, a fourth tank body 903 is provided on one end face of the second pressing block 9 away from the first pressing block 8, and both the first infusion tube 11 and the spray holes 904 are located in the fourth tank body 903.

[0041] Specifically, when the second pressing block 9 presses on the outer wall of the pipe, the pipe will block the fourth tank body 903, and the oxalic acid solution sprayed from the first infusion tube 11 will be in the fourth tank body 903, and can be evenly smeared on the outer wall of the pipe as the pipe rotates. At the same time, the high-temperature gas sprayed from the spray holes 904 can heat the pipe and the oxalic acid solution, strengthening the rust removal effect of the oxalic acid solution on the pipe.

[0042] As Figure 1 、 Figure 3 、 Figure 11 and Figure 12 As shown, a flange plate 29 is bolted and installed on the fixed box 6. A connecting pipe 30 matching the first through groove 601 is integrally formed on the flange plate 29, and a scraping plate 31 matching the outer diameter of the pipe is adhesively bonded to the inner wall of the connecting pipe 30. A sleeve 20 is welded on the inner wall of the fixed box 6, and a through hole 2001 and a second through groove 2002 are provided on the sleeve 20. A connecting box 21 matching the second through groove 2002 is welded on the sleeve 20, and a fourth infusion tube 22 is welded on the connecting box 21. The end of the fourth infusion tube 22 away from the connecting box 21 is inserted into the waste liquid filter 23.

[0043] Specifically, the through hole 2001 matches the piston rod of the hydraulic cylinder 7. The piston rod of the hydraulic cylinder 7 passes through the through hole 2001, and both the first pressing block 8 and the second pressing block 9 are located in the sleeve 20. After a section of the pipe is cut, the first chuck 2 will slide on the slide rail 101 in the direction of the laser cutting mechanism 4, and the pipe in the fixed box 6 will also move in the direction of the laser cutting mechanism 4. When the pipe slides out of the fixed box 6, the scraping plate 31 can scrape off the oxalic acid solution on the outer wall of the pipe. The scraped oxalic acid solution flows into the connecting box 21 and is then extracted and filtered by the waste liquid filter 23 for recycling.

[0044] Preferably, the scraper plate 31 is a polytetrafluoroethylene plate, which has strong corrosion resistance and will not be corroded by the oxalic acid solution, and almost all substances are not easy to adhere to its surface, and the scraped oxalic acid solution can flow into the connection box 21 through the surface of the scraper plate 31. In addition, the friction coefficient of the polytetrafluoroethylene plate is extremely low, and will not affect the rotation of the pipe when it is cut or the movement of the pipe toward the laser cutting mechanism 4.

[0045] like Figures 1 to 5 As shown, a sliding plate 5 is slidably connected to the sliding rail 101 , a fixed box 6 is fixedly installed on the sliding plate 5 , a plurality of cylinders 32 are fixedly installed on the machine body 1 , and a plurality of distance sensors 33 are evenly installed on the first through groove 601 .

[0046] Before cutting, place the pipe on the machine body 1, and the cylinder 32 can lift the pipe to a height matching 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 to make the second pressure block 9 lift 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 to ensure that the pipe can be under the laser cutting mechanism 4. At this time, the second chuck 3 also clamps the pipe.

[0047] After the first chuck 2 and the second chuck 3 clamp the pipe, the piston rod of the hydraulic cylinder 7 descends, the sliding plate 5 moves on the slide rail 101, and the multiple distance sensors 33 detect the pipe. The distance sensors 33 measure the distance between the pipe and the outer wall. If the distances between the multiple distance sensors 33 and the outer wall of the pipe are equal, it means that the pipe is not bent, and the straightening mechanism will not work, reducing energy consumption. If the pipe is bent at a certain point, the sliding plate 5 will stop at a position that matches the bent part of the pipe, and the straightening mechanism will press the bent part of the pipe to straighten it.

[0048] In addition, during the process of cutting the pipe, when the first chuck 2 drives the pipe to move laterally on the slide rail 101, the sliding plate 5 drives the fixed box 6 to do the same movement to prevent lateral friction between the pipe and the second pressing block 9. In this way, during the process of drilling holes, grooving and cutting the pipe, the pipe can be straightened, and the internal stress of the pipe is eliminated. The pipe is preheated and the cutting efficiency of the pipe is effectively guaranteed.

[0049] When in use, the laser cutting mechanism 4 cuts the pipe while the straightening mechanism presses the part of the pipe to be cut straight. As the first chuck 2 and the second chuck 3 drive the pipe to rotate, the force dissipation mechanism can evenly spray high-temperature gas on the straightened pipe to eliminate the internal stress of the straightened pipe, prevent the pipe from bending again, and preheat the pipe to improve the cutting quality. An operating method for a fiber laser pipe cutting machine comprises the following steps: S1. Loading: Place the pipe on the machine body 1, and the cylinder 32 jacks up to support the pipe upward. The first chuck 2 clamps and pushes the pipe so that the pipe enters the straightening mechanism; S2. Straightening: The straightening mechanism is started, and multiple hydraulic cylinders 7 are started. Multiple second pressing blocks 9 gather together to apply pressure to the pipe to straighten the pipe. The damping mechanism sprays high-temperature gas. When the straightening mechanism straightens the pipe, the elastic bladder 10 is compressed to spray lubricating fluid to reduce the friction between the second pressing block 9 and the pipe; 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. The lubricating fluid is evenly applied to the pipe to lubricate the pipe and at the same time clean the rust and dirt on the pipe; S4. Waste liquid recovery: After each section of the pipe is cut, during the process that the first chuck 2 pushes the pipe towards the laser cutting mechanism 4, the waste liquid is scraped off by the scraping plate 31 and enters the waste liquid filter 23.

[0050] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0051] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fiber laser pipe cutting machine, comprising 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 for clamping a pipe and can drive the pipe to rotate. A pair of slide rails matching the first chuck are fixedly connected to the machine body, and it is characterized in that, Further included are: A fixed box, which is installed on the machine body, and first through grooves are formed on both side walls of the fixed box; A plurality of straightening mechanisms, each straightening mechanism includes a plurality of hydraulic cylinders, and the plurality of hydraulic cylinders are fixedly arranged on the inner wall of the fixed box in a circumferential and uniform manner. A pressure-bearing part is fixedly connected to the piston rod of the hydraulic cylinder. When the piston rod of the hydraulic cylinder extends, the plurality of pressure-bearing parts gather together, and the plurality of pressure-bearing parts can straighten the pipe after gathering; A damping mechanism, which includes a third air pipe, one end of the third air pipe is communicated with a heat supply part, the other end of the third air pipe away from the heat supply part penetrates the fixed box, and the high-temperature gas emitted by the heat supply part is sprayed on the pipe after being straightened through the third air pipe. The heat supply part includes an electric heating air generator, and a fourth air pipe is fixedly connected to the electric heating air generator. The other 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.

2. The fiber laser pipe cutting machine according to claim 1, characterized in that, The pressure-bearing part includes a first pressing block and a second pressing block. A first groove body matching the second pressing block is formed on the first pressing block. The second pressing block is slidably connected to the first pressing block. An elastic capsule is fixedly connected to the bottom wall of the first groove body. Lubricating liquid is contained in the elastic capsule. A first infusion pipe and a second infusion pipe are fixedly connected to the elastic capsule. The first infusion pipe penetrates the second pressing block, and the other end of the second infusion pipe away from the elastic capsule is connected with a liquid supply assembly.

3. The fiber laser tube cutting machine according to claim 2, characterized in that, The liquid supply assembly includes a waste liquid filter, an infusion pump is fixedly installed on the waste liquid filter, a fifth infusion pipe is fixedly connected to the infusion pump, a one-way valve is installed on the fifth infusion pipe, the other end of the fifth infusion pipe away from the infusion pump penetrates the fixed box, and a second annular pipe matching the straightening mechanism is fixedly connected in the fixed box. The plurality of second annular pipes are uniformly communicated with the fifth infusion pipe. A plurality of third infusion pipes are fixedly connected to the second annular pipe. A second corrugated pipe is fixedly connected to the third infusion pipe. The other end of the second infusion pipe away from the elastic capsule is fixedly connected to the second corrugated pipe.

4. A fiber laser pipe cutting machine according to claim 3, characterized in that, A second groove body is formed on the second pressing block, and a pressure relief valve is installed on the pipe body of the first infusion pipe located in the second groove body.

5. The fiber laser pipe cutting machine according to claim 3, wherein A first annular pipe matching the straightening mechanism is fixedly connected in the fixed box. The plurality of first annular pipes are all communicated with the third air pipe. A plurality of second air pipes are fixedly connected to the first annular pipe. A first corrugated pipe is fixedly connected to the second air pipe. A first air pipe is fixedly connected to the first corrugated pipe. A third groove body communicated with the first air pipe is formed in the second pressing block. Air spraying holes are formed on the groove wall of the third groove body, and the air spraying holes penetrate the end face of the second pressing block away from the first pressing block.

6. A fiber laser pipe cutting machine according to claim 5, characterized in that, A fourth groove body is formed on the end face of the second pressing block away from the first pressing block, and the first infusion pipe and the air spraying holes are both located in the fourth groove body.

7. A fiber laser pipe cutting machine according to claim 3, characterized in that, 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 in 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.

8. A fiber laser pipe cutting machine according to claim 3, characterized in that, The lubricating liquid is oxalic acid solution.

9. A fiber laser pipe cutting machine according to any one of claims 1-8, 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 groove.

10. A method for operating a fiber laser pipe cutting machine, characterized in that, The following steps are involved: S1, loading, placing the pipe on the machine body, the cylinder lifts up the pipe, the first chuck clamps and pushes the pipe to make it enter the straightening mechanism; S2, straightening, the straightening mechanism is started, multiple hydraulic cylinders are started, multiple second pressing blocks gather together to apply pressure to the pipe to straighten the pipe, the force dissipation mechanism sprays high-temperature gas, and when the straightening mechanism presses the pipe to straighten, 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 liquid 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 a certain length, the first chuck pushes the pipe to move toward the laser cutting mechanism, and the waste liquid is scraped off by the scraper plate and enters the waste liquid filter.

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