High frequency welded pipe laser cutting device and method

Abstract

The application discloses a high-frequency welded pipe laser cutting device and method, and belongs to the field of high-frequency welded pipe processing. The device comprises a supporting part, a hollow air-electric slip ring connected to the inside of the supporting part, and a cutting assembly connected to one side of the hollow air-electric slip ring. The cutting assembly comprises an axial displacement part fixed to one side of the hollow air-electric slip ring. The lens is isolated from the airflow inside the nozzle by high-transparency glass, so that zinc vapor and oxide particles are prevented from adhering to the lens. A wind ring is arranged inside the nozzle. The air outlet of the wind ring faces the exhaust port of the nozzle. The air outlet and the wind focusing cover are designed in a wind focusing mode. The auxiliary gas entering the wind ring is discharged from the air outlet and guided through the wind focusing cover. The auxiliary gas guided through the wind focusing cover converges downward in the nozzle to form a dynamic air curtain, which blocks the zinc vapor backflow path from the lower cutting area, effectively preventing zinc vapor and oxide particles from adhering to the high-transparency glass.

Description

Technical Field

[0001] This invention relates to the field of high-frequency welded pipe processing, and more specifically, to a high-frequency welded pipe laser cutting device and method. Background Technology

[0002] High-frequency welded pipe is a seamless, continuously formed steel pipe that uses high-frequency current to electromagnetically induction heat the bent edge of steel strip or steel plate, causing the metal at the contact surface to melt rapidly. Then, under the action of high-pressure rollers, the gap is squeezed, welded, formed, and cooled.

[0003] Currently, in the production of high-frequency welded pipes, laser cutting is commonly used for cutting. For example, existing technology (Chinese utility model patent CN218836482U) discloses a high-frequency welded pipe laser cutting machine, which uses a laser cutting machine to cut the fixed high-frequency welded pipe. Although laser cutting offers advantages over traditional sawing, such as faster cutting speed, higher production efficiency, extremely narrow kerf, and higher cut quality, the focused spot temperature can instantaneously exceed 2000°C when cutting galvanized high-frequency welded pipes using laser cutting. At temperatures far exceeding the boiling point of zinc, the galvanized layer melts and rapidly vaporizes into zinc vapor. The evaporated zinc oxidizes quickly upon contact with air, forming fine zinc oxide (ZnO) particles or dust. Although the nozzle sprays protective gas into the cutting area, a high-speed jet is formed between the nozzle orifice and the external environment during the cutting of galvanized high-frequency welded pipes. According to Bernoulli's principle, a local low pressure is generated near the nozzle outlet. This "jet suction" draws some of the zinc vapor generated at high temperatures in the cutting area towards the nozzle root, through the gap between the nozzle and the protective window, and into the optical path protection zone. This causes zinc vapor and oxide particles to adhere to the optical elements (laser cutting lens), resulting in laser power attenuation, reduced cutting quality, and increased maintenance frequency. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of this invention is to provide a high-frequency welded pipe laser cutting device and method.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A high-frequency welded pipe laser cutting device includes a support part, a hollow pneumatic slip ring connected inside the support part, and a cutting assembly connected to one side of the hollow pneumatic slip ring.

[0007] The cutting assembly includes an axial displacement part fixed to one side of the hollow pneumatic slip ring, a laser generating part fixed to one side of the moving end of the axial displacement part, and a nozzle fixed to the lower end of the laser generating part.

[0008] The nozzle includes a hollow ring body one fixed to the lower end of the laser generator, a hollow ring body two snapped to the lower end of the hollow ring body, a lens fixed to the inner wall of the hollow ring body one, a high-transparency glass fixed to the inner wall of the hollow ring body two and located below the lens, an air ring fixed to the inner wall of the hollow ring body two and located below the high-transparency glass, and a gas inlet opened on the hollow ring body two, and the air outlet of the air ring is a concentrated air outlet.

[0009] Furthermore, the hollow pneumatic-electric slip ring includes a slip ring stator fixed inside the support portion and a slip ring rotor rotatably connected inside the support portion and connected to the slip ring stator. A drive portion for driving the slip ring rotor to rotate is connected inside the support portion. The drive portion includes a gear disk fixed to the outer surface of the slip ring rotor and a gear rotatably connected inside the support portion and meshing with the gear disk. A motor is fixed to one side of the support portion, and the output shaft of the motor penetrates into the support portion and is fixed to the gear.

[0010] Furthermore, the input end of the air ring passes through the hollow ring body and extends outward, the lower end of the air ring is inclined to open an air outlet, and the lower end of the air ring is also fixed to a wind concentrator, which is a hollow cone shape.

[0011] Furthermore, a flow-dispersing assembly is also connected inside the hollow ring body II, and the flow-dispersing assembly includes a motor II fixed inside the hollow ring body II, a gear II rotatably connected inside the hollow ring body II, a gear disk II rotatably connected to the inner wall of the hollow ring body II and meshing with the gear II, and a plurality of flow-dispersing plates fixed to the inner wall of the gear disk II. The output shaft of the motor II is fixedly connected to one side of the gear II.

[0012] Furthermore, a heat dissipation part is fixedly connected inside the hollow ring body two, and one end of the heat dissipation part passes through the hollow ring body two and extends outward, while the other end of the heat dissipation part is attached to one side of the motor two, and a sealing element is provided at the connection between the heat dissipation part and the hollow ring body two.

[0013] Furthermore, the outer side of the hollow ring body is also connected to a circumferential suction cup for the welding area, and the circumferential suction cup for the welding area includes a hollow disc body fixed to the outer side of the hollow ring body, multiple smoke ports opened at the lower end of the hollow disc body, and a negative pressure interface opened on the outer wall of the hollow disc body and connected to the multiple smoke ports.

[0014] Furthermore, it also includes an in-pipe air suppression component, which includes two base plates fixed to the lower end of the support, a movable seat slidably connected to the upper end of the two base plates, a column fixed to one side of the movable seat, a negative pressure chamber opened inside the column and the movable seat, multiple openings opened on the outer surface of the column and connected to the negative pressure chamber, a pipe snapped onto one side of the movable seat and connected to the negative pressure chamber, and a displacement component connected to the two base plates for driving the movable seat to move. The displacement component includes a stand fixed to the upper end of the two base plates, a lead screw with both ends rotatably connected to one side of the stand and one side of the support, a guide rod one with both ends fixed to one side of the stand and one side of the support, and a motor three fixed to one side of the stand. The output shaft of the motor three passes through the stand and is fixed to one end of the lead screw. The lead screw is screwed inside the movable seat, and the movable seat is movably sleeved outside the guide rod one.

[0015] Furthermore, a side plate is fixedly connected to one side of the movable seat, and the lower end of the side plate is slidably connected to the upper end of the upright. A pushing assembly is connected to the upper end of the side plate, and the pushing assembly includes a hydraulic cylinder fixedly connected to the upper end of the side plate, a slide block slidably connected to the upper end of the side plate, multiple connecting columns movably inserted into the movable seat, and a hollow pushing plate fixedly connected to one end of the multiple connecting columns and sleeved on the outside of the column body. The telescopic end of the hydraulic cylinder is fixedly connected to one side of the slide block, and the other end of the multiple connecting columns is fixedly connected to one side of the slide block.

[0016] Furthermore, it also includes a zinc removal assembly for the pipe surface, which includes two fixed seats respectively fixed to both sides of the laser generator, two adjusting cylinders respectively fixed to the upper ends of the two fixed seats, two sets of guide rods respectively movably inserted into the two fixed seats, two mounting seats respectively fixed to the lower ends of the two sets of guide rods, and cutting blades and chamfering blades respectively mounted on the lower ends of the two mounting seats. The telescopic ends of the two adjusting cylinders respectively pass through the two fixed seats and are respectively fixed to the upper ends of the two mounting seats.

[0017] A method for laser cutting high-frequency welded pipes, comprising the following steps, using a high-frequency welded pipe laser cutting device to cut the high-frequency welded pipes:

[0018] Step 1: When the high-frequency welded pipe passes through the hollow pneumatic slip ring, the control displacement component drives the movable seat to move towards the support part, so that the column is inserted into the inner cavity of the high-frequency welded pipe. The axial displacement part drives the laser generator to move towards the high-frequency welded pipe. The motor drives the slip ring rotor and the cutting component to rotate. The laser generator emits a laser beam. After the laser beam is focused by the lens, it cuts the high-frequency welded pipe.

[0019] Step 2: During the cutting process, auxiliary gas is introduced into the hollow ring body II through the gas inlet. The auxiliary gas is discharged from the bottom outlet of the hollow ring body II and blown towards the cutting point. At the same time, auxiliary gas is introduced into the wind ring. The auxiliary gas is discharged from the air outlet of the wind ring and converged downwards after being guided by the wind hood to form a dynamic air curtain.

[0020] Step 3: While the air ring is discharging air, motor 2 drives gear 2, gear disc 2 and baffle to rotate. The rotation of multiple baffles breaks the low-speed backflow zone inside the hollow ring 2 and disturbs the airflow boundary layer.

[0021] Step 4: A negative pressure is generated inside the pipe, which draws the fumes generated during cutting into the negative pressure chamber through the opening. The negative pressure interface is connected to a negative pressure pipe, which creates a negative pressure in multiple smoke inlets. The fumes generated during cutting are drawn into the smoke inlets. The fumes are discharged from the pipe and the negative pressure pipe into the negative pressure equipment. Finally, the fumes are filtered and purified before being discharged into the air.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] (1) This solution has a high-transparency glass inside the nozzle to isolate the lens from the airflow inside the nozzle, preventing zinc vapor and oxide particles from adhering to the lens, extending the lens's service life and reducing the cost of laser cutting (lens contamination and replacement). In addition, an air ring is set inside the nozzle, with the air outlet facing the nozzle's exhaust port. The air outlet and the air condenser are designed to concentrate the air. The auxiliary gas entering the air ring is discharged from the air outlet and guided by the air condenser. The auxiliary gas guided by the air condenser converges downward in the nozzle to form a dynamic air curtain, blocking the zinc vapor backflow path from the cutting area below. This effectively prevents zinc vapor and oxide particles from adhering to the high-transparency glass, ensuring that the high-transparency glass is not contaminated. This avoids the situation where the optical components are contaminated, resulting in laser power attenuation and reduced cutting quality, and reduces the maintenance frequency.

[0024] (2) This solution is equipped with a turbulence component. When the second motor drives the second gear disk and multiple turbulence plates on the inner wall of the second gear disk to rotate, the turbulence plates can break the low-speed backflow zone inside the nozzle, disturb the airflow boundary layer, reduce the backflow particles from being sprayed upwards, thereby further protecting the high-transparency glass from being contaminated. In addition, by setting the turbulence plates, the protective gas or auxiliary gas can be induced to form a spiral stable flow, delaying the development of turbulence, thereby improving the cutting quality.

[0025] (3) This solution is equipped with an in-pipe gas suppression component. Before cutting the high-frequency welded pipe, the column is controlled to move and enter the inner cavity of the high-frequency welded pipe. The high-temperature gas and particles rising in the cutting area of ​​the high-frequency welded pipe can be sucked into the negative pressure cavity through the negative pressure cavity and opening inside the column. The high-temperature molten slag atomized steam and particles in the cutting area are extracted in time, preventing them from entering the nozzle with the cutting airflow or reverse airflow. This significantly reduces the probability of splash particles or condensate "flowing back" into the laser head nozzle cavity, thereby reducing the risk of contamination of the lens and protective window. Attached Figure Description

[0026] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the support and motor structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of gear 1, gear disk 1, and hollow pneumatic-electric slip ring of the present invention;

[0029] Figure 4 This is a schematic diagram of the nozzle structure of the present invention;

[0030] Figure 5 These are cross-sectional views of the first hollow ring and the second hollow ring of the present invention;

[0031] Figure 6 This is a schematic diagram of the air outlet and wind concentrator structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the circumferential suction cup for the welding area and the zinc removal assembly for the pipe surface of the present invention;

[0033] Figure 8 This is a schematic diagram of the in-pipe gas suppression component structure of the present invention;

[0034] Figure 9 This is a cross-sectional view of the cylinder of the present invention.

[0035] Explanation of the labels in the diagram:

[0036] 1. Support unit; 11. Gear disc one; 12. Motor one; 13. Gear one; 2. Hollow pneumatic-electric slip ring; 21. Slip ring stator; 22. Slip ring rotor; 3. Cutting assembly; 31. Axial displacement unit; 32. Laser generator; 33. Nozzle; 331. Hollow ring body one; 332. Hollow ring body two; 333. Gas inlet; 334. Lens; 335. High-transparency glass; 336. Air ring; 337. Air outlet; 338. Air concentrator; 34. Baffle assembly; 341. Motor two; 342. Heat dissipation unit; 343. Gear two; 344. Gear disc two; 345. Baffle plate; 35. Circumferential suction cup for welding area; 351. 352. Hollow disc body; 353. Smoke inlet; 354. Negative pressure interface; 4. In-pipe air suppression assembly; 455. Base plate; 46. Shifting assembly; 47. Stand; 48. Lead screw; 49. Motor three; 40. Movable seat; 41. Column; 425. Opening; 426. Side plate; 427. Pipe; 428. Negative pressure chamber; 429. Guide rod one; 43. Pushing assembly; 44. Hydraulic cylinder; 450. Slide seat; 451. Connecting column; 46. Hollow pusher disc; 57. Zinc removal assembly for pipe surface; 58. Fixed seat; 59. Adjusting cylinder; 50. Guide rod two; 51. Mounting seat; 52. Cutting blade; 53. Chamfering blade. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] Please see Figures 1 to 9 A high-frequency welded pipe laser cutting device includes a support part 1, a hollow pneumatic slip ring 2 connected inside the support part 1, and a cutting assembly 3 connected to one side of the hollow pneumatic slip ring 2.

[0039] The cutting assembly 3 includes an axial displacement part 31 fixed to one side of the hollow pneumatic slip ring 2, a laser generating part 32 fixed to one side of the moving end of the axial displacement part 31, and a nozzle 33 fixed to the lower end of the laser generating part 32.

[0040] The nozzle 33 includes a hollow ring 331 fixed to the lower end of the laser generator 32, a hollow ring 332 snapped to the lower end of the hollow ring 331, a lens 334 fixed to the inner wall of the hollow ring 331, a high-transparency glass 335 (which can be made of high-purity fused silica) fixed to the inner wall of the hollow ring 332 and located below the lens 334, an air ring 336 fixed to the inner wall of the hollow ring 332 and located below the high-transparency glass 335 (which has the same structure as the cooling air ring 336 in the blow molding field, the difference being that the opening angle of the air outlet 337 of the air ring 336 is different; the air outlet 337 in this application is a cohesive opening, while the blow molding field commonly uses a diffuser opening), and a gas inlet 333 opened on the hollow ring 332. The air outlet of the air ring 336 is a converging air outlet.

[0041] The hollow pneumatic-electric slip ring 2 includes a slip ring stator 21 fixed inside the support part 1 and a slip ring rotor 22 rotatably connected inside the support part 1 and connected to the slip ring stator 21. The support part 1 is connected to a drive part for driving the slip ring rotor 22 to rotate. The drive part includes a gear disk 11 fixed to the outer surface of the slip ring rotor 22 and a gear 13 rotatably connected inside the support part 1 and meshing with the gear disk 11. A motor 12 is fixed to one side of the support part 1, and the output shaft of the motor 12 passes through into the support part 1 and is fixed to the gear 13.

[0042] The input end of the air ring 336 passes through the hollow ring body 332 and extends outward. The lower end of the air ring 336 is provided with an air outlet 337 at an angle, and the lower end of the air ring 336 is also fixed with a wind concentrator 338, which is a hollow cone shape.

[0043] By adopting the above technical solution, when the high-frequency welded pipe passes through the hollow gas-electric slip ring 2 (the hollow gas-electric slip ring 2 is a rotary connection device that integrates gas path (gas transmission) and circuit (power / signal transmission). Its core feature is that it has a hollow structure (central through hole), which can transmit gas, power and signal simultaneously when the equipment rotates, avoiding pipeline entanglement. It is suitable for electromechanical systems that require 360° infinite rotation and is a mature existing technology, which will not be elaborated here) and exits from one side of the slip ring rotor 22, the axial displacement part 31 works to drive the laser generating part 32 to move towards the high-frequency welded pipe, so that the distance between the nozzle 33 and the outer surface of the high-frequency welded pipe is closer. The laser generating part 32 works to emit a laser beam. After the laser beam is focused by the lens 334, it is emitted from the nozzle 33 to cut the high-frequency welded pipe. At the same time, the motor-12 works to drive the gear-13 and the gear disk-11 to rotate, so that the slip ring rotor 22, the laser generating part 32 and the nozzle 33 rotate. The nozzle 33 rotates around the high-frequency welded pipe to perform laser cutting on the high-frequency welded pipe. Gas inlet 333 The input ends of the air ring 336 are connected to the gas supply interface on the slip ring rotor 22. During the cutting process, auxiliary gas is sent into the hollow ring body 332 through the gas inlet 333. The auxiliary gas is discharged from the bottom opening 426 of the hollow ring body 332 and blown towards the cutting area. The auxiliary gas entering the air ring 336 is discharged from the air outlet 337 of the air ring 336. The auxiliary gas discharged from the air outlet 337 is guided by the wind concentrator 338 and converges downward to form a dynamic air curtain, blocking the zinc vapor backflow path from the cutting area below. This effectively prevents zinc vapor and oxide particles from adhering to the high-transparency glass 335, so that the high-transparency glass 335 will not be contaminated. This avoids the situation where the optical components are contaminated, resulting in laser power attenuation and a decrease in cutting quality, and reduces the maintenance frequency. The high-transparency glass 335 is set to isolate the airflow inside the lens 334 and the nozzle 33, preventing zinc vapor and oxide particles from adhering to the lens 334, extending the service life of the lens 334 and reducing the cost of laser cutting (the cost of replacing the lens 334 due to contamination).

[0044] like Figure 4 , Figure 5 and Figure 7 As shown, the hollow ring body 332 is also connected to a flow-dispersing component 34, which includes a motor 341 fixed inside the hollow ring body 332, a gear 343 rotatably connected inside the hollow ring body 332, a gear disk 344 rotatably connected to the inner wall of the hollow ring body 332 and meshing with the gear 343, and a plurality of flow-dispersing plates 345 fixed to the inner wall of the gear disk 344. The output shaft of the motor 341 is fixedly connected to one side of the gear 343.

[0045] A heat dissipation part 342 is also fixedly connected inside the hollow ring body 332. One end of the heat dissipation part 342 passes through the hollow ring body 332 and extends outward. The other end of the heat dissipation part 342 is attached to one side of the motor 341. A sealing element is provided at the connection between the heat dissipation part 342 and the hollow ring body 332.

[0046] The hollow ring body 2 332 is also connected to a welding area circumferential suction cup 35, and the welding area circumferential suction cup 35 includes a hollow disc body 351 fixed to the outside of the hollow ring body 2 332, a plurality of smoke ports 352 opened at the lower end of the hollow disc body 351, and a negative pressure interface 353 opened on the outer wall of the hollow disc body 351 and connected to the plurality of smoke ports 352.

[0047] By adopting the above technical solution, the motor 341 drives the gear 343 and the gear disk 344 to rotate. When the gear disk 344 rotates, it drives multiple baffles 345 to rotate. When the multiple baffles 345 rotate inside the hollow annulus 332, they can break the low-speed backflow zone inside the nozzle 33, disturb the airflow boundary layer, and reduce the upward backflow of backflow particles, thereby further protecting the high-transparency glass 335 from contamination. Furthermore, the baffles 345 can also induce protective gas or auxiliary gas. A spiral stable flow is formed, delaying the development of turbulence and thus improving the cutting quality. The negative pressure port 353 on the hollow disc 351 is connected to one of the gas supply ports on the slip ring rotor 22. The port on the slip ring stator 21 that matches this gas supply port is connected to the negative pressure device. The negative pressure generated inside the negative pressure port 353 causes the multiple smoke ports 352 to also generate negative pressure. The smoke / vapor generated during cutting can be sucked away through the smoke port 352 at the lower end of the hollow disc 351, preventing the smoke / vapor from staying near the cutting area.

[0048] like Figure 1 , Figure 2 , Figure 8 and Figure 9As shown, it also includes an in-pipe air suppression component 4, which includes two base plates 41 fixed to the lower end of the support 1, a movable seat 424 slidably connected to the upper end of the two base plates 41, a column 425 fixed to one side of the movable seat 424, a negative pressure chamber 429 opened inside the column 425 and the movable seat 424, multiple openings 426 opened on the outer surface of the column 425 and connected to the negative pressure chamber 429, a pipe 428 snapped onto one side of the movable seat 424 and connected to the negative pressure chamber 429, and a drive for the movable seat 424 connected to the two base plates 41. The movable displacement assembly 42 includes a stand 421 fixed to the upper ends of two base plates 41, a lead screw 422 whose two ends are rotatably connected to one side of the stand 421 and one side of the support 1 respectively, a guide rod 430 whose two ends are fixed to one side of the stand 421 and one side of the support 1 respectively, and a motor 423 fixed to one side of the stand 421. The output shaft of the motor 423 passes through the stand 421 and is fixed to one end of the lead screw 422. The lead screw 422 is screwed inside the movable seat 424, and the movable seat 424 is movably sleeved outside the guide rod 430.

[0049] A side plate 427 is fixedly connected to one side of the movable seat 424, and the lower end of the side plate 427 is slidably connected to the upper end of the upright seat 421. A pushing assembly 43 is connected to the upper end of the side plate 427. The pushing assembly 43 includes a hydraulic cylinder 431 fixedly connected to the upper end of the side plate 427, a slide block 432 slidably connected to the upper end of the side plate 427, a plurality of connecting columns 433 movably inserted into the movable seat 424, and a hollow pushing plate 434 fixedly connected to one end of the plurality of connecting columns 433 and sleeved on the outside of the column body 425. The telescopic end of the hydraulic cylinder 431 is fixedly connected to one side of the slide block 432, and the other end of the plurality of connecting columns 433 is fixedly connected to one side of the slide block 432.

[0050] By adopting the above technical solution, when the high-frequency welded pipe passes through the hollow pneumatic slip ring 2, the control displacement component 42 drives the movable seat 424 to move towards the support part 1, so that the column 425 is inserted into the inner cavity of the high-frequency welded pipe. The pipe 428 can be connected to a negative pressure device. Negative pressure is generated inside the pipe 428 and the negative pressure chamber 429. Through the opening 426, the flue gas / steam and particles rising from the cutting area of ​​the high-frequency welded pipe can be sucked into the negative pressure chamber 429. The high-temperature molten slag atomized steam and particles in the cutting area are extracted in time, preventing them from entering the nozzle 33 with the cutting airflow or reverse airflow. This significantly reduces the probability of splash particles or condensate "flowing back" into the nozzle 33 cavity, thereby reducing the risk of contamination of the lens 334 and the high-transparency glass 335.

[0051] like Figure 3 and Figure 7As shown, it also includes a zinc removal assembly 5 for the pipe surface, and the zinc removal assembly 5 includes two fixed seats 51 respectively fixed to both sides of the laser generating part 32, two adjusting cylinders 52 respectively fixed to the upper ends of the two fixed seats 51, two sets of guide rods 53 respectively movably inserted into the two fixed seats 51, two mounting seats 54 respectively fixed to the lower ends of the two sets of guide rods 53, and cutting blades 55 and chamfering blades 56 respectively mounted on the lower ends of the two mounting seats 54. The telescopic ends of the two adjusting cylinders 52 pass through the two fixed seats 51 respectively and are fixed to the upper ends of the two mounting seats 54 respectively.

[0052] By adopting the above technical solution, before laser cutting the high-frequency welded pipe, one of the adjusting cylinders 52 can be extended to move one of the mounting seats 54 and the cutting blade 55 toward the high-frequency welded pipe. The cutting blade 55 contacts the outer surface of the high-frequency welded pipe, thinning the galvanized layer at the laser-cut area. This significantly reduces the amount of zinc to be vaporized under laser heat, greatly reducing the chance of zinc vapor and particles entering the nozzle 33 and optical cavity, reducing zinc vaporization and splashing, and facilitating smoother discharge of molten slag. The cut has fewer burrs and less slag adhesion, and the flatness and smoothness of the cut wall are significantly improved. Furthermore, the auxiliary gas can focus more on blowing away the molten slag rather than dispersing a large amount of zinc vapor, which can appropriately reduce the gas pressure and volume, saving gas costs. The other adjusting cylinder 52 extends to move another mounting seat 54 and the chamfering blade 56 toward the high-frequency welded pipe. The chamfering blade 56 can chamfer the cut after cutting by the cutting blade 55.

[0053] How to use:

[0054] Step 1: When the high-frequency welded pipe passes through the hollow pneumatic slip ring 2, the control shifting component 42 drives the movable seat 424 to move towards the support part 1, so that the column 425 is inserted into the inner cavity of the high-frequency welded pipe. The motor 12 drives the slip ring rotor 22 and the cutting component 3 to rotate. The axial shifting part 31 (a single-axis moving module composed of a servo motor, ball screw and other structures, which is a mature existing technology and will not be described in detail here) drives the laser generating part 32 to move towards the high-frequency welded pipe. The laser generating part 32 emits a laser beam, which is focused by the lens 334 and cuts the high-frequency welded pipe.

[0055] Step 2: During the cutting process, auxiliary gas is introduced into the hollow ring body 332 through the gas inlet 333. The auxiliary gas is discharged from the bottom outlet of the hollow ring body 332 and blown towards the cutting point. At the same time, auxiliary gas is introduced into the wind ring 336. The auxiliary gas is discharged from the air outlet 337 of the wind ring 336 and guided downward by the wind concentrator 338 to form a dynamic air curtain.

[0056] Step 3: While the air ring 336 is discharging air, the motor 341 drives the gear 343, the gear disk 344 and the baffle 345 to rotate. The rotation of multiple baffles 345 breaks the low-speed backflow zone inside the hollow ring 332 and disturbs the airflow boundary layer.

[0057] Step 4: A negative pressure is generated inside the pipe 428, drawing the fumes generated during cutting into the negative pressure chamber 429 through the opening 426. The negative pressure interface 353 is connected to a negative pressure pipe, creating negative pressure in the multiple smoke inlets 352. The fumes generated during cutting are drawn into the smoke inlets 352 and discharged from the pipe 428 and the negative pressure pipe into the negative pressure equipment. Finally, the fumes are filtered and purified before being discharged into the air. The cut high-frequency welded pipe is sleeved on the outside of the column 425. The control movable seat 424 moves and resets towards the motor 423. The hydraulic cylinder 431 works to push the slide 432 and the hollow pusher plate 434 to move. The movement of the hollow pusher plate 434 pushes the high-frequency welded pipe outside the column 425 to move, causing the high-frequency welded pipe to be removed from the column 425 and fall down.

[0058] The above description is merely a preferred embodiment of the present invention; however, 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 its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A high-frequency welded pipe laser cutting device, comprising a support part (1), a hollow pneumatic slip ring (2) connected inside the support part (1), and a cutting assembly (3) connected to one side of the hollow pneumatic slip ring (2), characterized in that: The cutting assembly (3) includes an axial displacement part (31) fixed to one side of the hollow pneumatic slip ring (2), a laser generating part (32) fixed to one side of the moving end of the axial displacement part (31), and a nozzle (33) fixed to the lower end of the laser generating part (32). The nozzle (33) includes a hollow ring body one (331) fixed to the lower end of the laser generator (32), a hollow ring body two (332) snapped to the lower end of the hollow ring body one (331), a lens (334) fixed to the inner wall of the hollow ring body one (331), a high-transparency glass (335) fixed to the inner wall of the hollow ring body two (332) and located below the lens (334), an air ring (336) fixed to the inner wall of the hollow ring body two (332) and located below the high-transparency glass (335), and a gas inlet (333) opened on the hollow ring body two (332), and the air outlet of the air ring (336) is a concentrated air outlet; The hollow pneumatic slip ring (2) includes a slip ring stator (21) fixed inside the support part (1) and a slip ring rotor (22) rotatably connected inside the support part (1) and connected to the slip ring stator (21). The support part (1) is connected to a drive part for driving the slip ring rotor (22) to rotate. The drive part includes a gear disk (11) fixed to the outer surface of the slip ring rotor (22) and a gear (13) rotatably connected inside the support part (1) and meshing with the gear disk (11). A motor (12) is fixed to one side of the support part (1), and the output shaft of the motor (12) passes through into the support part (1) and is fixed to the gear (13). The input end of the wind ring (336) passes through the hollow ring body two (332) and extends outward. The lower end of the wind ring (336) is inclined to open an air outlet (337), and the lower end of the wind ring (336) is also fixedly connected to a wind concentrator (338), which is a hollow cone shape. The hollow ring body two (332) is also connected to a turbulence assembly (34), and the turbulence assembly (34) includes a motor two (341) fixed inside the hollow ring body two (332), a gear two (343) rotatably connected inside the hollow ring body two (332), a gear disk two (344) rotatably connected to the inner wall of the hollow ring body two (332) and meshing with the gear two (343), and a plurality of turbulence plates (345) fixed to the inner wall of the gear disk two (344). The output shaft of the motor two (341) is fixed to one side of the gear two (343).

2. The high-frequency welded pipe laser cutting device according to claim 1, characterized in that: The hollow ring body two (332) is also fixedly connected to a heat dissipation part (342), and one end of the heat dissipation part (342) passes through the hollow ring body two (332) and extends outward. The other end of the heat dissipation part (342) is attached to one side of the motor two (341), and a sealing element is provided at the connection between the heat dissipation part (342) and the hollow ring body two (332).

3. The high-frequency welded pipe laser cutting device according to claim 2, characterized in that: The hollow ring body two (332) is also connected to a welding area circumferential suction cup (35), and the welding area circumferential suction cup (35) includes a hollow disc body (351) fixed to the outside of the hollow ring body two (332), a plurality of smoke ports (352) opened at the lower end of the hollow disc body (351), and a negative pressure interface (353) opened on the outer wall of the hollow disc body (351) and connected to the plurality of smoke ports (352).

4. The high-frequency welded pipe laser cutting device according to claim 3, characterized in that: It also includes an in-pipe air suppression component (4), which includes two base plates (41) fixed to the lower end of the support (1), a movable seat (424) slidably connected to the upper end of the two base plates (41), a column (425) fixed to one side of the movable seat (424), a negative pressure chamber (429) opened inside the column (425) and the movable seat (424), multiple openings (426) opened on the outer surface of the column (425) and connected to the negative pressure chamber (429), a pipe (428) snapped onto one side of the movable seat (424) and connected to the negative pressure chamber (429), and a pipe connected to the two base plates (41) for driving the movable seat (424) to move. The displacement assembly (42) includes a stand (421) fixed to the upper end of two base plates (41), a lead screw (422) rotatably connected to one side of the stand (421) and one side of the support (1) at both ends, a guide rod (430) fixed to one side of the stand (421) and one side of the support (1) at both ends, and a motor (423) fixed to one side of the stand (421). The output shaft of the motor (423) passes through the stand (421) and is fixed to one end of the lead screw (422). The lead screw (422) is screwed inside the movable seat (424), and the movable seat (424) is movably sleeved outside the guide rod (430).

5. The high-frequency welded pipe laser cutting device according to claim 4, characterized in that: A side plate (427) is fixedly connected to one side of the movable seat (424), and the lower end of the side plate (427) is slidably connected to the upper end of the upright seat (421). A pusher assembly (43) is connected to the upper end of the side plate (427), and the pusher assembly (43) includes a hydraulic cylinder (431) fixedly connected to the upper end of the side plate (427), a slide seat (432) slidably connected to the upper end of the side plate (427), a plurality of connecting columns (433) movably inserted into the movable seat (424), and a hollow pusher plate (434) fixedly connected to one end of the plurality of connecting columns (433) and sleeved on the outside of the column body (425). The telescopic end of the hydraulic cylinder (431) is fixedly connected to one side of the slide seat (432), and the other end of the plurality of connecting columns (433) is fixedly connected to one side of the slide seat (432).

6. The high-frequency welded pipe laser cutting device according to claim 5, characterized in that: It also includes a zinc removal assembly (5) for the pipe surface, and the zinc removal assembly (5) includes two fixed seats (51) respectively fixed on both sides of the laser generator (32), two adjusting cylinders (52) respectively fixed on the upper ends of the two fixed seats (51), two sets of guide rods (53) respectively movably inserted into the two fixed seats (51), two mounting seats (54) respectively fixed on the lower ends of the two sets of guide rods (53), and cutting blades (55) and chamfering blades (56) respectively installed on the lower ends of the two mounting seats (54). The telescopic ends of the two adjusting cylinders (52) respectively pass through the two fixed seats (51) and are respectively fixed to the upper ends of the two mounting seats (54).

7. A method for laser cutting high-frequency welded pipes, characterized in that: The high-frequency welded pipe is cut using the high-frequency welded pipe laser cutting device described in claim 6, comprising the following steps: Step 1: When the high-frequency welded pipe passes through the hollow pneumatic slip ring (2), the control shifting component (42) drives the movable seat (424) to move towards the support part (1), so that the column (425) is inserted into the inner cavity of the high-frequency welded pipe. The axial shifting part (31) drives the laser generating part (32) to move towards the high-frequency welded pipe. The motor (12) drives the slip ring rotor (22) and the cutting component (3) to rotate. The laser generating part (32) emits a laser beam. The laser beam is focused by the lens (334) and cuts the high-frequency welded pipe. Step 2: During the cutting process, auxiliary gas is introduced into the hollow ring body 2 (332) through the gas inlet (333). The auxiliary gas is discharged from the bottom outlet of the hollow ring body 2 (332) and blown towards the cutting point. At the same time, auxiliary gas is introduced into the wind ring (336). The auxiliary gas is discharged from the air outlet (337) of the wind ring (336) and guided downward by the wind concentrator (338) to form a dynamic air curtain. Step 3: When the air ring (336) is venting, the second motor (341) drives the second gear (343), the second gear disk (344) and the baffle (345) to rotate. The rotation of multiple baffles (345) breaks the low-speed backflow zone inside the hollow ring body (332) and disturbs the airflow boundary layer. Step 4: The pipe (428) generates negative pressure inside, which draws the fumes generated during cutting into the negative pressure chamber (429) through the opening (426). The negative pressure interface (353) is connected to a negative pressure pipe, which creates negative pressure in the multiple smoke inlets (352). The fumes generated during cutting are drawn into the smoke inlets (352). The fumes are discharged from the pipe (428) and the negative pressure pipe into the negative pressure equipment. Finally, the fumes are filtered and purified before being discharged into the air.

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