A laser narrow slot cutting device and cutting method for petroleum screen pipe

Abstract

This invention discloses a laser narrow-slit cutting device and method for oil screen pipes, relating to the field of laser cutting technology for oil screen pipes. It includes a drive ring seat and feeding roller components. Four sets of feeding roller components are installed in a circular array structure on the front and rear surfaces of the drive ring seat, centered on the drive ring seat. This laser narrow-slit cutting device and method for oil screen pipes achieves efficient and precise cutting of oil screen pipes through the coordinated operation of the drive ring seat, feeding roller components, lifting drive frame, and laser cutting assembly. Specifically, the feeding roller components can stably fix oil screen pipes of different diameters and convey them at a uniform speed along the axial direction, ensuring the screen pipe remains stable during cutting. The drive ring seat can drive the screen pipe to rotate circumferentially, allowing the laser cutting assembly to continuously cut annular narrow slits around the outer circumference of the screen pipe. The lifting drive frame can precisely adjust the vertical height of the laser cutting assembly according to the wall thickness and cutting depth requirements of the screen pipe.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology for oil screens, specifically to a laser narrow slit cutting device and method for oil screens. Background Technology

[0002] Oil screens are key sand control devices used in oil extraction to prevent sand particles from entering the wellbore. Their core function is to filter formation sand and ensure oil production efficiency and fluid purity.

[0003] During oil and gas well production, formation sand can surge up along with crude oil or natural gas, potentially causing equipment wear, pipeline blockage, or even wellbore collapse. Oil screens, with their precisely designed slit structure, effectively block sand particles from entering while allowing the smooth passage of oil, gas, and water mixtures, making them one of the core tools in well completion and sand control operations.

[0004] The oil screen laser slot cutting device is a specialized device that uses a high-power-density laser beam to precisely process tiny slots on oil casing or tubing. It is used to manufacture high-performance sand-proof screens and is widely used in well completion and sand-proofing operations in complex well conditions such as horizontal and deviated wells.

[0005] By using a focused laser beam to locally melt or vaporize metal pipes, a tiny slit only 0.10–0.5 mm wide is cut around the pipe's perimeter, achieving high-precision, high-efficiency non-contact processing. Its core technology is based on the principle of thermal interaction between laser and material, combined with a CNC system to control the cutting path, ensuring a neat, burr-free slit.

[0006] Conventional laser narrow slot cutting devices for oil screens have limitations in some structural aspects, resulting in poor adaptability of the feeding mechanism to oil screens of different diameters. They are also unable to stably clamp irregularly shaped or variable-diameter pipes, which can lead to axial displacement or radial swaying of the pipes during the cutting process and large errors in the narrow slot width. At the same time, the laser cutting components lack flexibility in adjusting the angle and position, making it impossible to accurately adapt to the special requirements of screen slot angles in complex well conditions such as horizontal wells and deviated wells. Summary of the Invention

[0007] The purpose of this invention is to provide a laser narrow slot cutting device and method for oil screen pipes, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a laser narrow-slit cutting device for oil screen pipes, comprising a drive ring seat and a feeding roller assembly. Four sets of feeding roller assemblies are arranged in a circular array structure around the drive ring seat on both the front and rear surfaces. A lifting drive frame is vertically arranged on one side of the drive ring seat, and a laser cutting component is connected and installed on the lifting drive frame near the horizontal axis of the drive ring seat. The feeding roller assembly includes a first support frame, a docking seat, a hydraulic push rod, a second support frame, a drive seat, and a pushing roller. The first support frame is fixedly connected to the outer surface of the drive ring seat, and the docking seat is welded to both ends of the first support frame near the drive ring seat. Hydraulic push rods are horizontally connected and installed at both ends of the first support frame near the axis of the drive ring seat, and the piston rod end of the hydraulic push rod is fixedly connected to the side of the second support frame. The drive seat is bolted to both ends of the second support frame, and the pushing roller is rotatably mounted on the inner side of the drive seat via bearings. The outer surface of the pushing roller is covered with an anti-slip rubber layer.

[0009] Furthermore, the drive ring seat includes a fixed ring seat, an electric rotary seat, a fixed seat, a supporting inclined frame, a stabilizing inclined frame, and a fixed foot. The electric rotary seat is installed on both the front and rear sides of the fixed ring seat, and the fixed seat is fixedly connected to the surface of the electric rotary seat away from the fixed ring seat. The supporting inclined frames are symmetrically welded to the lower ends of the left and right sides of the fixed ring seat, and the supporting inclined frames are obliquely connected to the front and rear sides of the supporting inclined frames. At the same time, the lower ends of the supporting inclined frames and the stabilizing inclined frames are integrally provided with fixed feet.

[0010] Furthermore, the fixed base is arranged in a circular array with the electric rotary base as the center and corresponds to the number of feeding roller components. The fixed base has holes at the four opposite corners for bolt installation and fixing.

[0011] Furthermore, the four opposite corners of the docking seat are fixed to the four opposite corners of the fixed seat by bolts, and the docking seat and the first support frame are welded together. The pusher roller is arranged between the two sets of drive seats.

[0012] Furthermore, the lifting drive frame includes a main frame, a drive motor, a transmission screw, a movable seat, and a slide rail. The drive motor is vertically fixed to the upper end of the main frame near the laser cutting component. The upper end of the transmission screw is fixedly connected to the output shaft of the drive motor via a coupling, and the lower end of the transmission screw is rotatably mounted on the lower end of the main frame near the laser cutting component via a bearing. The movable seat is threaded onto the outside of the transmission screw, and both sides of the movable seat are slidably connected to slide rails symmetrically arranged on the inner wall of the main frame.

[0013] Furthermore, the slide rails are symmetrically and vertically fixedly installed on the front surface of the main frame, and the movable seat and the slide rails are connected in a slotted embedded structure.

[0014] Furthermore, the laser cutting assembly includes an electric push rod, an electric joint, an electric rotating seat, and a laser generator. The piston rod end of the electric push rod is fixedly connected to the base of the electric joint, and the electric rotating seat is installed at the output end of the electric joint. Moreover, the laser generator is vertically installed at the end of the electric rotating seat away from the electric joint.

[0015] Furthermore, the electric push rod is horizontally fixed to the front surface of the movable seat by bolts at four opposite corners at one end away from the electric joint. The laser generator uses a high-power fiber laser source, and the output laser beam is focused by a special focusing lens to form an extremely small spot with a diameter of less than 0.15mm. The width of the cutting slit can be stably controlled within 0.2mm.

[0016] This invention provides a laser narrow-slit cutting device for oil screen pipes, which has the following beneficial effects:

[0017] 1. This invention, through the cooperation between the drive ring seat and the feeding roller assembly, utilizes the extension and retraction of a hydraulic push rod to drive the second support frame and the pushing roller to move radially, flexibly adapting to oil screen pipes of different diameters and ensuring that the pushing roller closely adheres to the pipe surface. The anti-slip rubber layer on the outer surface of the pushing roller effectively increases the friction with the screen pipe, preventing slippage during feeding and ensuring stable feeding. On the other hand, the electric rotary seat drives the feeding roller assembly to rotate around the fixed ring seat axis. Combined with the rotation of the drive ring seat, this achieves circumferential feeding of the screen pipe, allowing the laser cutting assembly to uniformly process narrow slits on the circumference of the screen pipe. Simultaneously, the drive seat drives the pushing roller to rotate, enabling the pipe to move horizontally forward and backward. This cooperative method not only improves the equipment's adaptability to screen pipes of different specifications but also ensures the accuracy and continuity of the cutting process, effectively solving the problems of poor feeding adaptability and insufficient cutting angle adjustment mentioned in the background art.

[0018] 2. This invention utilizes the structural cooperation between the lifting drive frame and the laser cutting assembly. On one hand, the drive motor rotates the transmission screw, causing the moving seat to rise and fall stably along the slide rail, achieving precise vertical position adjustment of the laser cutting assembly to adapt to the cutting height requirements of oil screens of different diameters. On the other hand, the electric push rod can extend and retract horizontally, flexibly adjusting the distance between the laser generator and the screen surface to ensure the focused spot is always in the optimal cutting state. Simultaneously, the electric joint can swing at multiple angles, combined with the 360° rotation of the electric rotating seat, allowing the laser generator to be precisely aligned with any angle on the circumference of the screen, meeting the special requirements of complex well conditions such as horizontal and deviated wells for the narrow slot angle of the screen. This multi-dimensional adjustment mechanism effectively solves the problem of insufficient flexibility in the angle and position adjustment of conventional laser cutting assemblies, further improving the accuracy and adaptability of narrow slot cutting, ensuring stable narrow slot width and regular slot shape, fully meeting the manufacturing standards of high-performance sand control screens. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main body of the laser narrow slot cutting device for oil screen pipes according to the present invention;

[0020] Figure 2 This is a schematic diagram of the drive ring seat structure of a laser narrow slot cutting device for oil screen pipes according to the present invention;

[0021] Figure 3 This is a three-dimensional structural diagram of the feeding roller component of a laser narrow slot cutting device for oil screen pipes according to the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the lifting drive frame of the laser narrow slot cutting device for oil screen pipes according to the present invention;

[0023] Figure 5 This is a three-dimensional structural diagram of the laser cutting component of a laser narrow slot cutting device for oil screen pipes according to the present invention.

[0024] In the diagram: 1. Drive ring seat; 101. Fixed ring seat; 102. Electric rotary seat; 103. Fixed seat; 104. Supporting inclined frame; 105. Stabilizing inclined frame; 106. Fixed foot seat; 2. Feeding roller assembly; 201. First support frame; 202. Docking seat; 203. Hydraulic push rod; 204. Second support frame; 205. Drive seat; 206. Pushing roller; 3. Lifting drive frame; 301. Main frame; 302. Drive motor; 303. Transmission screw; 304. Moving seat; 305. Slide rail; 4. Laser cutting assembly; 401. Electric push rod; 402. Electric joint; 403. Electric rotating seat; 404. Laser generator. Detailed Implementation

[0025] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0026] like Figures 1 to 5As shown, a laser narrow-slit cutting device for oil screen pipes includes a drive ring seat 1 and a feeding roller assembly 2. Four sets of feeding roller assemblies 2 are installed in a circular array structure on the front and rear surfaces of the drive ring seat 1 with the drive ring seat 1 as the center. A lifting drive frame 3 is vertically arranged on one side of the drive ring seat 1, and a laser cutting assembly 4 is connected and installed on the lifting drive frame 3 near the horizontal axis of the drive ring seat 1. The feeding roller assembly 2 includes a first support frame 201, a docking seat 202, a hydraulic push rod 203, a second support frame 204, a drive seat 205, and a pushing roller 206. The first support frame 201 is fixedly connected to the outer surface of the drive ring seat 1, and the docking seat 202 is welded to the first support frame 204. The two ends of the first support frame 201 are close to the side of the drive ring seat 1. Hydraulic push rods 203 are horizontally connected and installed at both ends of the first support frame 201 near the axis of the drive ring seat 1. The piston rod end of the hydraulic push rod 203 is fixedly connected to the side of the second support frame 204. The drive seat 205 is bolted to both ends of the second support frame 204. The push roller 206 is rotatably mounted on the inner side of the drive seat 205 via bearings. The outer surface of the push roller 206 is covered with an anti-slip rubber layer. The drive ring seat 1 includes a fixed ring seat 101, an electric rotary seat 102, a fixed seat 103, a support inclined frame 104, a stabilizing inclined frame 105, and a fixed foot seat 106. The front and rear ends of the fixed ring seat 101... Electric rotary seats 102 are installed on both sides, and fixed seats 103 are fixedly connected to the surface of the electric rotary seats 102 away from the fixed ring seat 101. Supporting inclined frames 104 are symmetrically welded to the lower ends of the left and right sides of the fixed ring seat 101, and stabilizing inclined frames 105 are obliquely connected to the front and rear sides of the supporting inclined frames 104. Fixed feet 106 are integrally provided at the lower ends of the supporting inclined frames 104 and the stabilizing inclined frames 105. The fixed feet 103 are arranged in a circular array structure with the electric rotary seats 102 as the center, corresponding to the number of feeding roller components 2. Holes for bolt installation are provided at the four opposite corners of the fixed feet 106. The four opposite corners of the mating seat 202 are also provided. The feed roller 206 is fixed to the four diagonal points of the fixed base 103 by bolts, and the docking base 202 and the first support frame 201 are welded together. The feed roller 206 is set between the two sets of drive bases 205. In use, the extension and retraction of the hydraulic push rod 203 drives the second support frame 204 to move the feed roller 206 radially. The clamping distance can be flexibly adjusted according to the actual diameter of the oil screen pipe to ensure that the feed roller 206 fits tightly against the surface of the pipe body, effectively preventing axial displacement or radial shaking of the pipe body during feeding. The anti-slip rubber layer on the outer surface of the feed roller 206 not only increases the friction with the screen pipe and prevents slippage, but also protects the surface of the screen pipe and prevents scratches.Meanwhile, the electric rotary seat 102 can drive the feeding roller component 2 to rotate around the axis of the fixed ring seat 101. Combined with the rotation of the drive ring seat 1, this achieves circumferential feeding of the screen tube, enabling the laser cutting component 4 to uniformly process the required narrow slits on the circumference of the screen tube. The drive seat 205 drives the pusher roller 206 to rotate, which can drive the screen tube to perform axial displacement, achieving continuous feeding and ensuring the continuity and efficiency of the cutting process. This multi-dimensional feeding adjustment mechanism significantly improves the equipment's adaptability to different specifications, irregular shapes, or variable diameter pipes, solving the problem of poor feeding adaptability in conventional devices.

[0027] like Figures 1 to 5As shown, the lifting drive frame 3 includes a main frame 301, a drive motor 302, a transmission screw 303, a movable seat 304, and a slide rail 305. The drive motor 302 is vertically fixed to the upper end of the main frame 301 near the laser cutting assembly 4. The upper end of the transmission screw 303 is fixedly connected to the output shaft of the drive motor 302 via a coupling, and the lower end of the transmission screw 303 is rotatably mounted on the lower end of the main frame 301 near the laser cutting assembly 4 via a bearing. The movable seat 304 is threaded onto the outside of the transmission screw 303, and the two sides of the movable seat 304 are symmetrically connected to the inner wall of the main frame 301. The slide rails 305 are symmetrically and vertically fixedly installed on the front surface of the main frame 301. The movable seat 304 and the slide rails 305 are connected in a slotted embedded structure. The laser cutting assembly 4 includes an electric push rod 401, an electric joint 402, an electric rotating seat 403, and a laser generator 404. The piston rod end of the electric push rod 401 is fixedly connected to the base of the electric joint 402, and the electric rotating seat 403 is installed at the output end of the electric joint 402. The laser generator 404 is vertically installed at the end of the electric rotating seat 403 away from the electric joint 402. The end of 401 furthest from the electric joint 402 is horizontally fixed to the front surface of the moving base 304 by bolts at four opposite corners. The laser generator 404 uses a high-power fiber laser source, and the output laser beam is focused by a special focusing lens to form an extremely small spot with a diameter of less than 0.15mm. The width of the cutting slit can be stably controlled within 0.2mm. During use, the electric joint 402 in the laser cutting assembly 4 can achieve multi-angle swing, which, together with the 360° rotation of the electric rotating base 403, allows the laser generator 404 to be precisely aligned with any angle on the circumference of the screen pipe, meeting the needs of complex well conditions such as horizontal wells and inclined wells. The device addresses the specific requirements of the narrow slit angle in the screen pipe. The horizontal extension and retraction of the electric push rod 401 flexibly adjusts the distance between the laser generator 404 and the screen pipe surface, ensuring the focused laser spot is always in the optimal cutting state. This further guarantees the accuracy and stability of the narrow slit cutting. Meanwhile, the drive motor 302 drives the transmission screw 303 to rotate, causing the moving seat 304 to rise and fall stably along the slide rail 305. This precisely adjusts the vertical height of the laser cutting assembly 4 to adapt to the cutting position requirements of oil screen pipes of different diameters, ensuring that the laser generator 404 is always aligned with the area to be cut on the screen pipe, providing reliable positional assurance for the accuracy of the narrow slit cutting. Simultaneously, the slotted embedded connection structure between the slide rail 305 and the moving seat 304 effectively limits the offset of the moving seat 304, further improving the stability of the lifting process and preventing positional sway from affecting cutting accuracy. This multi-dimensional adjustment and stabilization mechanism enables the device to maintain efficient and precise operation when facing complex specifications of oil screen pipe cutting tasks, fully meeting the manufacturing process requirements of high-performance sand-proof screen pipes.

[0028] In summary, as Figures 1 to 5As shown, when using the laser narrow slot cutting device for oil screen pipes, the device is first installed on a flat workbench by bolts through the holes at opposite corners of the fixed feet 106 via the support bracket 104 and the fixed base 103 at the bottom of the stable bracket 105, ensuring that the overall structure is stable and does not shake.

[0029] Subsequently, based on the diameter of the oil screen pipe to be processed, the hydraulic push rod 203 is activated to extend and retract, driving the second support frame 204 to move the push roller 206 radially to a suitable distance, and the screen pipe is placed between the four sets of push rollers 206 so that the anti-slip rubber layer is tightly attached to the surface of the pipe body to prevent the pipe body from shifting or slipping.

[0030] Next, the drive motor 302 is started, and the moving seat 304 is driven to rise and fall smoothly along the slide rail 305 through the transmission screw 303, adjusting the laser cutting component 4 to the vertical height corresponding to the area to be cut on the screen tube; then, the electric push rod 401 is extended and retracted horizontally to precisely adjust the distance between the laser generator 404 and the surface of the screen tube, ensuring that the focused spot is in the best cutting state.

[0031] The start-up drive seat 205 drives the pusher roller 206 to rotate, realizing the axial continuous feeding of the screen tube; at the same time, the start-up electric rotary seat 102 drives the feed roller component 2 to rotate around the axis of the fixed ring seat 101, which, together with the rotation of the drive ring seat 1, completes the circumferential feeding of the screen tube, so that the laser generator 404 can uniformly process narrow slits on the circumference of the screen tube.

[0032] During the cutting process, the laser cutting angle can be flexibly adjusted through the multi-angle swing of the electric joint 402 and the 360° rotation of the electric rotating seat 403, meeting the special requirements of narrow slot angles for complex well conditions such as horizontal and deviated wells. After cutting, all drive components are turned off, the processed screen pipe is removed, and one operation is completed. The entire operation process is highly automated, with stable cutting accuracy and a narrow slot width that can be controlled within 0.2mm, effectively improving the efficiency and quality of narrow slot cutting for oil screen pipes, and fully meeting the manufacturing standards for high-performance sand control screen pipes.

[0033] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A laser narrow-slit cutting device for oil screen pipes, comprising a drive ring seat (1) and a feeding roller component (2), characterized in that: The front and rear surfaces of the drive ring seat (1) are arranged in a ring array structure with the drive ring seat (1) as the center, and four sets of feeding roller components (2) are installed. A lifting drive frame (3) is vertically arranged on one side of the drive ring seat (1). A laser cutting component (4) is connected and installed on the lifting drive frame (3) near the horizontal axis of the drive ring seat (1). The feeding roller component (2) includes a first support frame (201), a docking seat (202), a hydraulic push rod (203), a second support frame (204), a drive seat (205), and a pushing roller (206). The first support frame (201) is fixedly connected to the drive ring seat ( 1) The outer surface of the first support frame (201) is welded to the two ends of the first support frame (201) near the drive ring seat (1), and the two ends of the first support frame (201) near the axis of the drive ring seat (1) are horizontally connected to the hydraulic push rod (203), and the piston rod end of the hydraulic push rod (203) is fixedly connected to the side of the second support frame (204); the drive seat (205) is bolted to the two ends of the second support frame (204), and the push roller (206) is rotatably installed on the inner side of the drive seat (205) through the bearing, and the outer surface of the push roller (206) is covered with an anti-slip rubber layer.

2. The laser narrow slot cutting device for oil screens according to claim 1, characterized in that, The drive ring seat (1) includes a fixed ring seat (101), an electric rotary seat (102), a fixed seat (103), a support bracket (104), a stabilizing bracket (105), and a fixed foot (106). The electric rotary seat (102) is installed on both the front and rear sides of the fixed ring seat (101), and the fixed seat (103) is fixedly connected to the side surface of the electric rotary seat (102) away from the fixed ring seat (101). The support bracket (104) is symmetrically welded to the lower ends of the left and right sides of the fixed ring seat (101), and the stabilizing bracket (105) is obliquely connected to both the front and rear sides of the support bracket (104). At the same time, the lower ends of the support bracket (104) and the stabilizing bracket (105) are integrally provided with a fixed foot (106).

3. The laser narrow slot cutting device for oil screens according to claim 2, characterized in that, The fixed base (103) is arranged in a ring array with the electric rotary base (102) as the center and corresponds to the number of feeding roller components (2). The fixed foot base (106) has holes for bolt installation at its four opposite corners.

4. The laser narrow slot cutting device for oil screens according to claim 3, characterized in that, The four opposite corners of the docking seat (202) are fixed to the four opposite corners of the fixed seat (103) by bolts, and the docking seat (202) and the first support frame (201) are welded together. The pusher roller (206) is arranged between the two sets of drive seats (205).

5. The laser narrow slot cutting device for oil screens according to claim 4, characterized in that, The lifting drive frame (3) includes a main frame (301), a drive motor (302), a transmission screw (303), a movable seat (304), and a slide rail (305). The drive motor (302) is vertically fixed at the upper end of the main frame (301) near the laser cutting assembly (4). The upper end of the transmission screw (303) is fixedly connected to the output shaft of the drive motor (302) through a coupling. The lower end of the transmission screw (303) is rotatably mounted on the lower end of the main frame (301) near the laser cutting assembly (4) through a bearing. The movable seat (304) is threaded onto the outside of the transmission screw (303). The two sides of the movable seat (304) are slidably connected to the slide rails (305) symmetrically arranged on the inner wall of the main frame (301).

6. The laser narrow slot cutting device for oil screens according to claim 5, characterized in that, The slide rail (305) is symmetrically and vertically fixedly installed on the front surface of the main frame (301), and the movable seat (304) and the slide rail (305) are connected in a slotted embedded structure.

7. The laser narrow slot cutting device for oil screens according to claim 6, characterized in that, The laser cutting assembly (4) includes an electric push rod (401), an electric joint (402), an electric rotating seat (403), and a laser generator (404). The piston rod end of the electric push rod (401) is fixedly connected to the base of the electric joint (402), and the electric rotating seat (403) is installed at the output end of the electric joint (402). The laser generator (404) is vertically installed at the end of the electric rotating seat (403) away from the electric joint (402).

8. The laser narrow slot cutting device for oil screens according to claim 7, characterized in that, The electric push rod (401) is horizontally fixed to the front surface of the movable seat (304) by bolts at four opposite corners of one end away from the electric joint (402). The laser generator (404) adopts a high-power fiber laser source.

9. A method for laser narrow-slot cutting of oil screen pipes, used in the laser narrow-slot cutting device for oil screen pipes as described in claim 8, characterized in that, The operating steps are as follows: First, the device is installed on a flat workbench by bolts through the holes at the diagonal of the fixed feet (106) using the fixed base (103) at the bottom of the supporting inclined frame (104) and stabilizing inclined frame (105) to ensure that the overall structure is stable and does not shake; then, according to the diameter of the oil screen pipe to be processed, the hydraulic push rod (203) is started to extend and retract to drive the second support frame (204), which drives the push roller (206) to move radially to a suitable distance, and the screen pipe is placed between the four sets of push rollers (206); then the drive motor (302) is started, and the moving seat (304) is driven to rise and fall smoothly along the slide rail (305) through the transmission screw (303), and the laser cutting component (4) is adjusted to the vertical height corresponding to the area to be cut of the screen pipe; then the electric The push rod (401) extends horizontally to precisely adjust the distance between the laser generator (404) and the screen tube surface, ensuring that the focused spot is in the best cutting state; the drive seat (205) is started to drive the push roller (206) to rotate, realizing the axial continuous feeding of the screen tube; at the same time, the electric rotary seat (102) is started to drive the feeding roller component (2) to rotate around the axis of the fixed ring seat (101), and the rotation of the drive ring seat (1) is coordinated to complete the circumferential feeding of the screen tube, so that the laser generator (404) can uniformly process narrow slits on the circumference of the screen tube; during the cutting process, the laser cutting angle is flexibly adjusted by the multi-angle swing of the electric joint (402) and the 360° rotation of the electric rotary seat (403). After the cutting is completed, the drive components are turned off, the processed screen tube is removed, and one operation is completed.

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