Precise positioning method for automatic cutting and assembling of chemical pipeline groove

Abstract

The present application provides a precision positioning method for automatic cutting and assembling of chemical pipeline bevel, relates to the technical field of laser cutting, two-section pipe fittings are sent from both ends of the conveying table, the two sides of the pipe fittings are clamped, the conveying rollers on the conveying table are conveyed and the positioning assembly is connected, the positioning assembly is in extrusion contact with the inner wall of the pipe fittings, the axis of the pipe fittings and the center of the circular plate of the positioning assembly are kept in the same straight line; the pipe body is moved to the vicinity of the positioning assembly through the rotation of the conveying rollers and the clamping of the clamping frame on the pipe fittings, the pipe fittings can be pulled by the conveying rollers through the clamping of the clamping frame, the stability of the pipe fittings during movement is maintained, and the conveying table near the positioning assembly is not provided with conveying rollers, which can avoid interfering with the rotation of the cutting assembly, and the clamping of the clamping frame on the pipe fittings can also maintain the stability of the pipe fittings during the cutting process, and the dust suction equipment is arranged at the bottom of the conveying roller to absorb the cutting debris.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, specifically a method for the precise positioning of automatic cutting and assembly of bevels for chemical pipelines. Background Technology

[0002] A beveling for chemical pipelines involves machining a specific angled surface or groove (such as a V-shape or U-shape) on the pipe end before welding. The core purpose is to ensure root penetration, improve joint strength, facilitate slag removal, and control welding deformation. Ensuring penetration: This allows the arc to penetrate deep into the root, avoiding defects such as incomplete penetration and slag inclusions, which is especially crucial for thick-walled (typically ≥3.5mm) chemical pipelines. Enhancing strength: This increases the fusion area, improves the joint's load-bearing capacity, and meets the sealing and structural requirements of pipelines handling high-pressure, high-temperature, or toxic media. Facilitating operation and forming: Standardized beveling shapes (e.g., 30°–37.5°) help with precise electrode / wire positioning, slag removal, and uniform weld formation. Compliance with standards and safety: Chemical pipelines are mostly pressure equipment, and beveling is a mandatory requirement for welding procedure qualification and standards such as ASME / GB, directly impacting operational safety.

[0003] In existing technologies, when cutting chemical pipelines with a U-shaped bevel, the angle and length of the bevel need to be considered, which requires measuring and marking the pipe's interface. However, this method is inefficient and affects accuracy. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a precise positioning method for automatic cutting and assembly of chemical pipeline bevels, thereby solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides a precise positioning method for automatic cutting and assembly of bevels in chemical pipelines, wherein the cutting and precise positioning method includes the following steps:

[0006] (1) Two pipe sections are fed in from both ends of the conveyor table, clamped on both sides of the pipe section, and connected to the positioning component by the conveyor roller on the conveyor table. The positioning component is pressed against the inner wall of the pipe section to keep the axis of the pipe section and the center of the circular plate of the positioning component on the same straight line.

[0007] (2) Adjust the pressure plate of the component to contact the top outer wall of the pipe, and simultaneously adjust the initial position of the laser cutting end of the cutting component according to the outer diameter of the pipe.

[0008] (3) The horizontal frame of the cutting assembly is adjusted to the bevel angle of the pipe fitting bevel as needed, and the cutting is carried out by the laser cutting device. The first and second rotating rings of the positioning assembly cooperate to make the laser cutting device rotate around the periphery of the pipe fitting for cutting.

[0009] (4) The laser cutting device is driven to move along the inside of the horizontal frame by adjusting the components, and the bevel is cut to different depths by sliding along the inside of the horizontal frame;

[0010] (5) After the two sets of pipe fittings are cut simultaneously, they are sent out from both ends of the conveyor table and the debris generated during cutting is collected.

[0011] Furthermore, according to step (1), after the pipe is fed into the conveying platform, the conveying platform has moving slots on both sides, and two moving seats are symmetrically slidably connected inside the moving slots. A bidirectional screw is rotatably installed inside the moving slot on one side of the conveying platform. The moving seat is threaded onto the surface of the bidirectional screw. A top frame is fixed on the top of the moving seat at both ends of the conveying roller, and a bidirectional electric push rod is fixed on the top of the top frame. A bracket is slidably inserted inside the moving seat. A clamping frame is fixed at one end of the bracket facing the pipe body. The outer end of the bracket is fixedly connected to the extended end of the bidirectional electric push rod. The bidirectional electric push rod drives the bracket and clamping frame to move, clamping the two sides of the pipe body and keeping the pipe body in the middle position of the conveying platform. The motor on the outer wall of the conveying platform drives the bidirectional screw to rotate. The moving seats at both ends of the moving slot and the bidirectional screw are threaded together and move towards the middle of the conveying platform. Because the clamping frame clamps the pipe, and in conjunction with the rotation of the conveying roller, the pipe body is moved to the vicinity of the positioning component.

[0012] Furthermore, according to step (1), the positioning component includes a fixed plate, which is fixed in the middle of the conveyor table. Circular plates are fixed on both sides of the fixed plate. Four grooves are equidistantly opened on the surface of the circular plates, and sliders are slidably connected inside the grooves. A rod is slidably inserted inside the slider. A cylinder is fixed at one end of the rod facing the pipe. A first rotating ring is rotatably installed inside the fixed plate. The first rotating ring and the center of the circular plate are on the same straight line. Four connecting rods are equidistantly rotatably connected to the inner ring of the first rotating ring, and the other end of the connecting rod is rotatably connected to the rod through a rotating shaft. Before the pipe approaches, the pipe is positioned by the cylinder pressing against the inner wall of the pipe, so that the axis of the pipe and the center of the circular plate are on the same straight line.

[0013] Furthermore, a first toothed ring is fixed to the outer ring of the first rotating ring that protrudes from one end of the fixed plate. A first gear is rotatably mounted on the top of the fixed plate corresponding to the side of the first toothed ring, and the first gear meshes with the first toothed ring. The motor inside the fixed plate drives the first gear to rotate and mesh with the first toothed ring, causing the first rotating ring to rotate. This causes the connecting rods on the inner walls at both ends of the first rotating ring to rotate and pull the insert rod and slider to move along the inside of the slide groove, bringing the four sets of cylinders together at the middle position. After the pipe cutting end contacts the circular plate, the motor drives the first gear to rotate in the opposite direction, causing the connecting rod to drive the four cylinders to unfold outward until the cylinders are pressed into contact with the inside of the pipe.

[0014] Furthermore, according to step (2), the cutting assembly includes a second vertical frame, a sliding plate is slidably connected inside the second vertical frame, a horizontal plate is slidably inserted inside the sliding plate, a laser cutting device is provided at the bottom of the horizontal plate near the end of the pipe, a first electric push rod is fixedly fixed at the top of the horizontal plate of the laser cutting device, and the extended end of the first electric push rod is fixedly connected to the top of the laser cutting device. A first vertical frame is provided on the side of the laser cutting device away from the second vertical frame, and a horizontal frame is slidably installed inside the first vertical frame. The laser cutting device is driven to descend by the first electric push rod to adjust the cutting depth of the pipe. The specific depth is determined according to the slope of the bevel.

[0015] Furthermore, the two inner sides of the horizontal frame are provided with inner grooves, and a moving block is slidably connected inside the inner groove. The two sides of the laser cutting device are rotatably connected to the moving block through a rotating shaft. A sleeve frame is rotatably installed on the inner walls of the two sides of the first vertical frame corresponding to the position of the horizontal frame. The two sides of the horizontal frame slide through the sleeve frame. An obstacle-detection stop motor is fixed on the outer wall of one side of the first vertical frame corresponding to the rotation position of the sleeve frame, and the output end of the obstacle-detection stop motor is fixedly connected to the rotation shaft of the sleeve frame. The obstacle-detection stop motor drives the sleeve frame to rotate, and the horizontal frame also rotates synchronously. The rotation angle is adjusted according to the inclination angle of the bevel. The laser cutting device cuts the pipe. The inclination angle of the horizontal frame is kept consistent with the bevel slope angle, which limits the cutting position and cutting depth of the laser cutting device to perform precise U-shaped bevel cutting.

[0016] Furthermore, a vertical groove is provided on the side of the first vertical frame away from the motor that stops upon encountering an obstacle, and a vertical screw is rotatably installed inside the groove. A screw block is threaded onto the surface of the vertical screw, and a movable frame is slidably inserted into the outer surface of the screw block. A limit ring is fixed to the bottom of the movable frame at the bottom of the laser cutting device, and a fixed ring is fixed to the surface of the laser cutting device at the bottom of the horizontal frame. A telescopic vertical frame is fixed to the top of the movable frame, and the top of the telescopic vertical frame is fixedly connected to the horizontal plate. The vertical screw is driven to rotate by a motor built into the first vertical frame, causing the screw block to move along the inside of the vertical groove. The movable frame moves synchronously, adjusting the position of the limit ring. When the horizontal plate moves to adjust the position of the laser cutting device, the movable frame slides along the outer surface of the screw block, and the limit ring adjusts its position synchronously, keeping it in the same position as the fixed ring. The height of the limit ring can be adjusted along the bevel slope by the drive of the vertical screw, thereby limiting the distance the laser cutting device descends each time, keeping the distance between the fixed ring and the limit ring the same as the distance between the highest and lowest points of the bevel.

[0017] Further, according to step (2), the adjustment component includes a fixed frame, fixed frames are fixed on both sides of the top of the fixed plate, and a second electric push rod is fixed inside the fixed frame. A connecting frame is fixed to the extended end of the second electric push rod. Pressure plates are fixed at the bottom of both ends of the connecting frame. The pressure plates are pressed against the top of the pipe. An arc frame is fixed on the side of the pressure plate facing the bottom of the first vertical frame. An arc plate is slidably inserted inside the arc frame. The arc plate is fixedly connected to the bottom of the first vertical frame. The second electric push rod drives the connecting frame and the pressure plates on both sides to move up and down, so that the pressure plate covers the top of the pipe. Because the arc plate and the arc block are inserted horizontally, the pressure plate drives the first vertical frame, the horizontal frame, the horizontal plate and the laser cutting device to move synchronously along the inside of the second vertical frame. The initial position of the bottom of the laser cutting device is adjusted according to the outer diameter of the pipe, close to the outer surface of the pipe. The arc plate and the arc frame are aligned with the rotation path of the center of the circular plate.

[0018] Furthermore, according to step (3), the positioning component also includes a second rotating ring. The fixing plate is rotatably mounted on the outer ring of the first rotating ring. The two ends of the second rotating ring pass through the fixing plate. The outer ring of the second rotating ring away from the first toothed ring is fixed with a second toothed ring. The bottom of the fixing plate is rotatably mounted on the outer ring of the second toothed ring. The second gear meshes with the second toothed ring. The fixing plate is equipped with a connection that drives the second gear to rotate. The outer ring of the circular plate is rotatably sleeved with a shaft collar. A connecting rod is fixed at equal distances between the two shaft collars and the connecting rod passes through the second rotating ring. The bottom of the second vertical frame is fixed with a fixing seat, and the fixing seat is fixed on the shaft collar. The motor inside the fixing plate drives the second gear to rotate and mesh with the second toothed ring, so that the two shaft collars rotate along the outer ring of the circular plate under the drive of the second rotating ring and the connecting rod. Because the fixing seat connects the shaft collar and the second vertical frame, the cutting component rotates in a ring with the shaft collar, thereby performing a ring-shaped U-shaped bevel cut on the cutting end of the pipe fitting.

[0019] Furthermore, according to step (4), the adjustment assembly also includes an adjustment screw. The adjustment screw is rotatably mounted on the top of the slide plate. The end of the slide plate away from the first electric push rod is threaded onto the surface of the adjustment screw. A drive box is provided on the top of the fixed plate between the two sets of adjustment screws. Drive shafts are rotatably protruding from both ends of the drive box. An arc groove is opened at the end of the adjustment screw facing the drive shaft. The drive shaft is inserted into the slide groove through an arc block. An mounting plate is fixed on the top of the drive box. The other end of the mounting plate is fixedly connected to the connecting frame. Side grooves are opened on both sides of the slide plate. A slide is fixed at both ends of the top of the first vertical frame. The slide slides along the inside of the side groove. The arc block of the drive shaft is inserted into the adjustment arc groove. Thus, the drive box can drive the rotation of the drive shaft and the adjustment screw, so that the slide plate moves through the slide plate and adjusts the position of the laser cutting device and the first vertical frame. The moving blocks on both sides of the laser cutting device slide along the horizontal frame to perform bevel cutting on the bevel.

[0020] The beneficial effects of this invention are:

[0021] 1. This invention uses a clamping frame to hold the pipe, which, in conjunction with the rotation of the conveying roller, moves the pipe to the vicinity of the positioning component. The clamping frame, combined with the traction of the conveying roller, maintains the stability of the pipe during movement. Furthermore, no conveying roller is installed near the positioning component on the conveying platform, thus avoiding interference with the rotation of the cutting component. The clamping frame also maintains the stability of the pipe during the cutting process. A dust collection device is installed at the bottom of the conveying roller to absorb the debris generated during cutting.

[0022] 2. In this invention, before the pipe approaches, the motor inside the fixing plate drives the first gear to rotate and mesh with the first gear ring, causing the first rotating ring to rotate. This causes the connecting rods on the inner walls at both ends of the first rotating ring to rotate, pulling the insert rod and the slider to move along the inside of the groove, bringing the four sets of cylinders together at the middle position. After the pipe cutting end contacts the circular plate, the motor drives the first gear to rotate in the opposite direction, causing the connecting rod to drive the four cylinders to unfold outward until the cylinders are pressed into contact with the inside of the pipe, thereby positioning the pipe and aligning the axis of the pipe with the center of the circular plate, which facilitates subsequent laser cutting.

[0023] 3. In this invention, the motor built into the first vertical frame drives the vertical screw to rotate, causing the screw block to move along the inside of the vertical groove. The moving frame moves synchronously to adjust the position of the limiting ring. Here, the limiting ring and the moving frame are connected to the horizontal plate through the telescopic vertical frame. When the horizontal plate moves to adjust the position of the laser cutting device, the moving frame slides along the outer surface of the screw block, and the limiting ring adjusts its position synchronously to keep it in the same position as the fixed ring.

[0024] 4. This invention uses a vertical screw to drive the height of the limiting ring along the bevel slope, thereby limiting the distance the laser cutting device descends each time. The distance between the fixed ring and the limiting ring is kept the same as the distance between the highest and lowest points of the bevel. The telescopic vertical frame can be understood as a telescopic plate structure. The motor stops when encountering resistance, causing the sleeve frame to rotate. Because of the insertion of the horizontal frame into the sleeve frame, the horizontal frame also rotates synchronously. The rotation angle is adjusted according to the bevel's inclination angle. The laser cutting device cuts the pipe. The first electric push rod drives the laser cutting device to descend, adjusting the cutting depth of the pipe. The specific depth is determined by the bevel slope. The inclination angle of the horizontal frame remains consistent with the bevel slope angle, limiting the cutting position and depth of the laser cutting device for precise U-shaped bevel cutting.

[0025] 5. In this invention, the motor inside the fixed plate drives the second gear to rotate and mesh with the second gear ring, so that the two shaft rings rotate along the outer ring of the circular plate under the drive of the second rotating ring and the connecting rod. Since the fixed seat connects the shaft rings and the second vertical frame, the cutting assembly rotates in a ring with the shaft rings, thereby performing a ring-shaped U-shaped bevel cut on the cutting end of the pipe fitting.

[0026] 6. In this invention, the connecting frame and the pressure plates on both sides are moved up and down by the second electric push rod, so that the pressure plate covers the top of the pipe fitting. Because the arc plate and the arc block are inserted laterally, the pressure plate drives the first vertical frame, the horizontal frame, the horizontal plate and the laser cutting device to move synchronously along the inside of the second vertical frame. The initial position of the bottom of the laser cutting device is adjusted according to the outer diameter of the pipe fitting, so that it is close to the outer surface of the pipe fitting. The arc plate and the arc frame are aligned with the rotation path of the circular plate. Therefore, when the collar drives the cutting assembly to rotate, the arc plate can be separated from the inside of the arc frame, and the first vertical frame is separated from the pressure plate without interference.

[0027] 7. In this invention, the arc block of the drive shaft is inserted into the adjusting arc groove, and the drive box drives the rotation of the drive shaft and the adjusting screw, causing the horizontal plate to move through the sliding plate and adjust the position of the laser cutting device and the first vertical frame. The slide of the first vertical frame is a telescopic frame with adjustable length. After adjusting the initial position of the first vertical frame and the laser cutting device, the length of the slide is locked. When the adjusting screw drives the horizontal plate to move and the laser cutting device moves toward the first vertical frame, the position of the first vertical frame will not change, while the moving blocks on both sides of the laser cutting device slide along the horizontal frame to perform bevel cutting. The drive box and the connecting frame are connected by the mounting plate, so that the drive shaft can move up and down together with the adjusting screw. The insertion of the arc groove and the arc block is the same as the connection method of the arc plate and the arc frame, both on the rotation path of the circular plate, avoiding interference movement. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the process flow of a precise positioning method for automatic cutting and assembly of bevels in chemical pipelines proposed in an embodiment of this disclosure;

[0029] Figure 2 This is a schematic diagram of the overall structure of a precise positioning method for automatic cutting and assembly of chemical pipeline beveling proposed in an embodiment of this disclosure;

[0030] Figure 3 This is a schematic diagram of the internal structure of the conveyor in a precise positioning method for automatic cutting and assembly of chemical pipeline beveling proposed in an embodiment of this disclosure;

[0031] Figure 4 This is a schematic diagram of the connection between the positioning component and the pipe fitting in a precise positioning method for automatic cutting and assembly of chemical pipeline beveling proposed in an embodiment of this disclosure;

[0032] Figure 5 This is a schematic diagram of the surface structure of a circular plate in a precise positioning method for automatic cutting and assembly of bevels in chemical pipelines proposed in an embodiment of this disclosure.

[0033] Figure 6 This is a schematic diagram of the connection between the first toothed ring and the first gear in a precise positioning method for automatic cutting and assembly of chemical pipeline beveling proposed in an embodiment of this disclosure;

[0034] Figure 7 This is a schematic diagram of the connection between the second toothed ring and the second gear in a precise positioning method for automatic cutting and assembly of chemical pipeline beveling proposed in an embodiment of this disclosure;

[0035] Figure 8 This is a structural schematic diagram of a precise positioning method for automatic cutting and assembly of chemical pipeline beveling proposed in an embodiment of this disclosure;

[0036] Figure 9This is a schematic diagram of the connection between the drive shaft and the adjusting screw in a precise positioning method for automatic cutting and assembly of chemical pipeline beveling proposed in an embodiment of this disclosure;

[0037] Figure 10 This is a schematic diagram of the connection between the cutting component and the pressure plate in a precise positioning method for automatic cutting and assembly of chemical pipeline beveling proposed in an embodiment of this disclosure;

[0038] Figure 11 This is a schematic diagram of the cutting component structure in a precise positioning method for automatic cutting and assembly of chemical pipeline beveling proposed in an embodiment of this disclosure;

[0039] Figure 12 This is a schematic diagram showing the connection between the horizontal frame and the first vertical frame in a precise positioning method for automatic cutting and assembly of chemical pipeline beveling proposed in an embodiment of this disclosure.

[0040] As shown in the figure: 1. Conveyor table; 11. Conveyor roller; 12. Moving trough; 13. Bidirectional screw; 14. Moving seat; 16. Insert frame; 17. Clamping frame; 18. Top frame; 19. Bidirectional electric push rod;

[0041] 2. Pipe body;

[0042] 3. Positioning assembly; 31. Fixing plate; 32. Circular plate; 33. Slide groove; 34. Slider; 35. Cylinder; 36. First spring; 37. Collar; 38. Insert rod; 39. First rotating ring; 310. Connecting rod; 311. First gear ring; 312. First gear; 313. Second rotating ring; 314. Second gear ring; 315. Second gear; 316. Connecting rod;

[0043] 4. Cutting assembly; 41. First vertical frame; 42. Horizontal plate; 43. Second vertical frame; 44. Fixing base; 45. Horizontal frame; 46. Laser cutting device; 47. Vertical groove; 48. Vertical screw; 49. Moving frame; 410. Limiting ring; 411. Sleeve; 412. Slide plate; 413. Side groove; 414. Carriage; 415. Moving block; 416. Fixing ring; 417. Motor stop upon obstruction; 418. First electric push rod; 419. Inner groove; 420. Screw block; 421. Telescopic vertical frame;

[0044] 5. Adjustment component; 51. Fixing frame; 52. Second electric push rod; 53. Connecting frame; 54. Pressure plate; 55. Mounting plate; 56. Drive box; 57. Drive shaft; 58. Adjusting screw; 59. Arc groove; 510. Arc frame; 511. Arc plate. Detailed Implementation

[0045] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0046] like Figure 1 As shown in the embodiments of this disclosure, a precise positioning method for automatic cutting and assembly of chemical pipeline beveling is proposed. The cutting and precise positioning method includes the following steps:

[0047] (1) Two pipe sections are fed in from both ends of the conveyor table, clamped on both sides of the pipe section, and connected to the positioning component by the conveyor roller on the conveyor table. The positioning component is pressed against the inner wall of the pipe section to keep the axis of the pipe section and the center of the circular plate of the positioning component on the same straight line.

[0048] (2) Adjust the pressure plate of the component to contact the top outer wall of the pipe, and simultaneously adjust the initial position of the laser cutting end of the cutting component according to the outer diameter of the pipe.

[0049] (3) The horizontal frame of the cutting assembly is adjusted to the bevel angle of the pipe fitting bevel as needed, and the cutting is carried out by the laser cutting device. The first and second rotating rings of the positioning assembly cooperate to make the laser cutting device rotate around the periphery of the pipe fitting for cutting.

[0050] (4) The laser cutting device is driven to move along the inside of the horizontal frame by adjusting the components, and the bevel is cut to different depths by sliding along the inside of the horizontal frame;

[0051] (5) After the two sets of pipe fittings are cut simultaneously, they are sent out from both ends of the conveyor table and the debris generated during cutting is collected.

[0052] like Figure 2 and Figure 3 As shown, the apparatus involved in this method includes: a conveyor table 1, a positioning component 3 disposed in the middle of the conveyor table 1, electrically driven conveying rollers 11 rotatably mounted at both ends of the conveyor table 1 at equal intervals from the positioning component 3, a tube 2 placed on the surface of the conveying roller 11, a cutting component 4 disposed at the top of the end of the tube 2 that contacts the positioning component 3, an adjusting component 5 disposed at the top of the positioning component 3, the adjusting component 5 being drively connected to the cutting component 4, and movable grooves 12 opened on both sides of the conveyor table 1, with two movable seats 14 symmetrically slidably connected inside the movable grooves 12. A bidirectional screw 13 is rotatably installed inside the moving groove 12 on one side. The moving seat 14 is threaded onto the surface of the bidirectional screw 13. A top frame 18 is fixed to the top of the moving seat 14 at both ends of the conveying roller 11, and a bidirectional electric push rod 19 is fixed to the top of the top frame 18. A bracket 16 is slidably inserted inside the moving seat 14. A clamping frame 17 is fixed to one end of the bracket 16 facing the tube body 2, and the clamping frame 17 is in contact with the outer wall of the tube body 2. The outer end of the bracket 16 is fixedly connected to the extended end of the bidirectional electric push rod 19. The conveying table 1 in this scheme is a partial length, not the entire length.

[0053] Understandably, the two sections of tube 2 are fed into the conveyor platform 1 from both ends. The electrically driven conveyor roller 11 rotates to transport the tube. The bidirectional electric push rod 19 drives the insert 16 and clamping frame 17 to move, clamping the tube 2 on both sides and keeping it in the middle position of the conveyor platform 1. The motor on the outer wall of the conveyor platform 1 drives the bidirectional screw 13 to rotate. The moving seats 14 at both ends of the moving groove 12 are threadedly engaged with the bidirectional screw 13 and move towards the middle of the conveyor platform 1. Because the clamping frame 17 clamps the tube, in conjunction with the rotation of the conveyor roller 11, the tube 2 is moved to the vicinity of the positioning component 3. The clamping frame 17 can work with the conveyor roller 11 to pull the tube and maintain the stability of the tube during movement. Furthermore, no conveyor roller 11 is set near the positioning component 3 on the conveyor platform 1, which can avoid interfering with the rotation of the cutting component 4. The clamping frame 17 can also maintain the stability of the tube during the cutting process. A dust collection device is set at the bottom of the conveyor roller 11 to absorb the debris generated during cutting.

[0054] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments, the positioning component 3 includes a fixing plate 31, which is fixed in the middle of the conveyor table 1. Circular plates 32 are fixed on both sides of the fixing plate 31. Four grooves 33 are equidistantly spaced on the surface of the circular plates 32, and sliders 34 are slidably connected inside the grooves 33. A rod 38 is slidably inserted into the slider 34. A cylinder 35 is fixed to one end of the rod 38 facing the pipe, and the cylinder 35 is in contact with the inner wall of the pipe. A first spring 36 is fixed between the slider 34 and the grooves 33. The internal rotation of the fixing plate 31 is... The first rotating ring 39 is mounted on the same straight line as the center of the circular plate 32. The inner ring of the first rotating ring 39 is equidistantly connected to four connecting rods 310, and the other end of the connecting rods 310 is rotatably connected to the insert rod 38 through a rotating shaft. The outer ring of the first rotating ring 39, which extends through one end of the fixing plate 31, is fixed with a first toothed ring 311. A first gear 312 is rotatably mounted on the top of the fixing plate 31 corresponding to the side of the first toothed ring 311, and the first gear 312 meshes with the first toothed ring 311. A motor that drives the first gear 312 to rotate is fixedly mounted inside the fixing plate 31.

[0055] Understandably, before the pipe approaches, the motor inside the fixing plate 31 drives the first gear 312 to rotate and mesh with the first gear ring 311, causing the first rotating ring 39 to rotate. This causes the connecting rods 310 on the inner walls at both ends of the first rotating ring 39 to rotate, pulling the insert rod 38 and the slider 34 to move along the inside of the slide groove 33, bringing the four sets of cylinders 35 together at the middle position. After the pipe cutting end contacts the circular plate 32, the motor drives the first gear 312 to rotate in the opposite direction, causing the connecting rods 310 to drive the four cylinders 35 to unfold outward until the cylinders 35 are pressed into contact with the inside of the pipe, thereby positioning the pipe and aligning the axis of the pipe with the center of the circular plate 32, which facilitates subsequent laser cutting.

[0056] like Figure 10 , Figure 11 and Figure 12 As shown, in some embodiments, the cutting assembly 4 includes a second vertical frame 43, a sliding plate 412 is slidably connected inside the second vertical frame 43, a horizontal plate 42 is slidably inserted inside the sliding plate 412, a laser cutting device 46 is provided at the bottom of the horizontal plate 42 near the end of the pipe, a first electric push rod 418 is fixedly fixed at the top of the horizontal plate 42 and the extended end of the first electric push rod 418 is fixedly connected to the top of the laser cutting device 46, a first vertical frame 41 is provided on the side of the laser cutting device 46 away from the second vertical frame 43, a horizontal frame 45 is slidably installed inside the first vertical frame 41, inner grooves 419 are opened on the two inner sides of the horizontal frame 45, a moving block 415 is slidably connected inside the inner grooves 419, the two sides of the laser cutting device 46 are rotatably connected to the moving block 415 through a rotating shaft, a sleeve frame 411 is rotatably installed on the inner walls of the two sides of the first vertical frame 41 corresponding to the position of the horizontal frame 45, the two sides of the horizontal frame 45 slide through the sleeve frame 411, the first vertical... An obstacle-detection stop motor 417 is fixed on one side of the outer wall of frame 41 at a position corresponding to the rotation of the sleeve frame 411, and the output end of the obstacle-detection stop motor 417 is fixedly connected to the rotation shaft of the sleeve frame 411. A vertical groove 47 is provided on the side of the first vertical frame 41 away from the obstacle-detection stop motor 417, and a vertical screw 48 is rotatably installed inside the vertical groove 47. A screw block 420 is threaded onto the surface of the vertical screw 48, and a movable frame 49 is slidably inserted into the outer surface of the screw block 420. The movable frame 49 is located in the laser cutting device 4. A limiting ring 410 is fixed at the bottom of the 6. A fixing ring 416 is fixed on the surface of the bottom of the horizontal frame 45 of the laser cutting device 46. A telescopic vertical frame 421 is fixed on the top of the movable frame 49, and the top of the telescopic vertical frame 421 is fixedly connected to the horizontal plate 42. The laser cutting device 46 is a laser cutting equipment used in the intelligent manufacturing equipment industry; manufacturing of metal cutting and welding equipment such as automatic and semi-automatic electric arc and plasma arc welding machines; intelligent casting islands; intelligent welding systems; and intelligent heat treatment production line technologies.

[0057] It should be noted that, based on the distance between the lowest and highest points of the bevel surface of the pipe fitting, the vertical screw 48 is driven to rotate by the motor built into the first vertical frame 41, causing the screw block 420 to move along the inside of the vertical groove 47. The moving frame 49 moves synchronously, adjusting the position of the limiting ring 410. Here, the limiting ring 410 and the moving frame 49 are connected to the horizontal plate 42 via the telescopic vertical frame 421. Thus, when the horizontal plate 42 moves to adjust the position of the laser cutting device 46, the moving frame 49 slides along the outer surface of the screw block 420, and the limiting ring 410 adjusts its position synchronously, maintaining the same position as the fixed ring 416. The height of the limiting ring 410 can be adjusted along the bevel surface by driving the vertical screw 48, thereby limiting the distance the laser cutting device 46 descends each time. The distance between the fixed ring 416 and the limiting ring 410 is kept the same as the distance between the highest and lowest points of the bevel. The telescopic vertical frame 421 can be understood as a telescopic plate structure. The frame 411 is rotated by the obstacle-stopping motor 417. Because the horizontal frame 45 is inserted into the frame 411, the horizontal frame 45 also rotates synchronously. The rotation angle is adjusted according to the inclination angle of the bevel. The laser cutting device 46 cuts the pipe. The laser cutting device 46 is driven to descend by the first electric push rod 418. The depth of the cut on the pipe is adjusted. The specific depth is determined according to the slope of the bevel. The inclination angle of the horizontal frame 45 is kept consistent with the slope angle of the bevel. The cutting position and cutting depth of the laser cutting device 46 are limited to perform precise U-shaped bevel cutting.

[0058] like Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments, the positioning component 3 further includes a second rotating ring 313. The second rotating ring 313 is rotatably mounted on the outer ring of the first rotating ring 39 on the fixing plate 31. Both ends of the second rotating ring 313 extend out of the fixing plate 31. A second toothed ring 314 is fixed on the outer ring of the second rotating ring 313 away from the first toothed ring 311. A second gear 315 is rotatably mounted on the bottom of the fixing plate 31 on the outer ring of the second toothed ring 314. The second gear 315 meshes with the second toothed ring 314. A connection for driving the second gear 315 to rotate is installed inside the fixing plate 31. A shaft collar 37 is rotatably sleeved on the outer ring of the circular plate 32. A connecting rod 316 is fixed at equal distances between the two shaft collars 37, and the connecting rod 316 is fixedly passed through the second rotating ring 313. A fixing seat 44 is fixed at the bottom of the second vertical frame 43, and the fixing seat 44 is fixed on the shaft collar 37.

[0059] Understandably, the motor inside the fixed plate 31 drives the second gear 315 to rotate and mesh with the second gear ring 314, causing the two shaft rings 37 to rotate along the outer ring of the circular plate 32 under the drive of the second rotating ring 313 and the connecting rod 316. Since the fixed seat 44 connects the shaft rings 37 and the second vertical frame 43, the cutting assembly 4 rotates in a ring with the shaft rings 37, thereby performing a ring-shaped U-shaped bevel cut on the cutting end of the pipe fitting.

[0060] like Figure 8 and Figure 10 As shown, in some embodiments, the adjusting assembly 5 includes a fixing frame 51. The fixing frame 51 is fixed on both sides of the top of the fixing plate 31, and a second electric push rod 52 is fixed inside the fixing frame 51. A connecting frame 53 is fixed to the extended end of the second electric push rod 52. Pressure plates 54 are fixed to the bottom of both ends of the connecting frame 53. The pressure plates 54 are in pressure contact with the top of the pipe. An arc frame 510 is fixed to the side of the pressure plate 54 facing the bottom of the first vertical frame 41. An arc plate 511 is slidably inserted inside the arc frame 510. The arc plate 511 is fixedly connected to the bottom of the first vertical frame 41.

[0061] It should be noted that the second electric push rod 52 drives the connecting frame 53 and the two side pressure plates 54 to move up and down, so that the pressure plate 54 covers the top of the pipe fitting. Because the arc plate 511 and the arc block are inserted horizontally, the pressure plate 54 drives the first vertical frame 41, the horizontal frame 45, the horizontal plate 42 and the laser cutting device 46 to move synchronously along the inside of the second vertical frame 43. The initial position of the bottom of the laser cutting device 46 is adjusted according to the outer diameter of the pipe fitting, close to the outer surface of the pipe fitting. The arc plate 511 and the arc frame 510 rotate along the same path as the center of the circular plate 32. When the collar 37 drives the cutting assembly 4 to rotate, the arc plate 511 can be separated from the inside of the arc frame 510, and the first vertical frame 41 is separated from the pressure plate 54 without interference. The slide plate 412 and the inner wall of the second vertical frame 43 are in frictional sliding contact or magnetic adsorption. When there is no external force, the slide plate 412 can be kept in the position inside the second vertical frame 43, or the position of the slide plate 412 can be locked by bolts.

[0062] like Figure 8 , Figure 9 and Figure 10As shown, in some embodiments, the adjusting assembly 5 further includes an adjusting screw 58. The adjusting screw 58 is rotatably mounted on the top of the slide plate 412 located on the horizontal plate 42. The end of the horizontal plate 42 away from the first electric push rod 418 is threaded onto the surface of the adjusting screw 58. A drive box 56 is provided on the top of the fixing plate 31 between the two sets of adjusting screws 58. Drive shafts 57 rotatably extend from both ends of the drive box 56. An arc groove 59 is provided on the end of the adjusting screw 58 facing the drive shaft 57. The drive shaft 57 is inserted into the slide groove 33 through an arc block. An mounting plate 55 is fixed on the top of the drive box 56. The other end of the mounting plate 55 is fixedly connected to the connecting frame 53. Side grooves 413 are provided on both sides of the horizontal plate 42. A slide 414 is fixed at both ends of the top of the first vertical frame 41. The slide 414 slides along the inside of the side groove 413.

[0063] It should be noted that the drive box 56 houses a motor and a transmission belt. The two pulleys of the transmission belt connect the motor output to the drive shaft 57. The arc block of the drive shaft 57 is inserted into the adjusting arc groove 59, thereby driving the rotation of the drive shaft 57 and the adjusting screw 58 via the drive box 56. This causes the horizontal plate 42 to move through the slide plate 412, adjusting the position of the laser cutting device 46 and the first vertical frame 41. The slide 414 of the first vertical frame 41 is an adjustable telescopic frame. After adjusting the initial position of the first vertical frame 41 and the laser cutting device 46, the slide 414... The length is locked, and the adjusting screw 58 drives the horizontal plate 42 to move. When the laser cutting device 46 moves toward the first vertical frame 41, the position of the first vertical frame 41 will not change. The moving blocks 415 on both sides of the laser cutting device 46 slide along the horizontal frame 45 to cut the bevel. The drive box 56 and the connecting frame 53 are connected by the mounting plate 55, so the drive shaft 57 can move up and down with the adjusting screw 58. The insertion of the arc groove 59 and the arc block is the same as the connection method of the arc plate 511 and the arc frame 510. They are all on the rotation path of the circular plate 32 to avoid interference movement.

[0064] Working principle:

[0065] When using the device, two pipe sections are fed into the conveyor platform 1 from both ends, and two pipe bodies 2 are fed into the conveyor platform 1 from both ends respectively. The electrically driven conveyor roller 11 rotates to convey the pipe sections. The bidirectional electric push rod 19 drives the insert frame 16 and clamp frame 17 to move, clamping the pipe body 2 on both sides and keeping it in the middle position of the conveyor platform 1. The motor on the outer wall of the conveyor platform 1 drives the bidirectional screw 13 to rotate. The moving seats 14 at both ends of the moving groove 12 are threadedly engaged with the bidirectional screw 13 and move towards the middle of the conveyor platform 1. Because the clamp frame 17 clamps the pipe sections, in conjunction with the rotation of the conveyor roller 11, the pipe body 2 is moved to the vicinity of the positioning component 3. The clamp frame 17 clamps the pipe sections, which, in conjunction with the conveyor roller 11, pulls the pipe sections, maintaining the stability of the pipe sections during movement. The conveyor platform 1 is close to the positioning component 3. The absence of a conveyor roller 11 near the positioning component 3 avoids interference with the rotation of the cutting component 4. The clamping frame 17 also maintains stability during the pipe cutting process. A dust extraction device is installed at the bottom of the conveyor roller 11 to absorb the cutting debris. The pipe is conveyed by the conveyor roller 11 on the conveyor table 1 and docks with the positioning component 3. The positioning component 3 presses against the inner wall of the pipe, keeping the pipe axis aligned with the center of the circular plate 32 of the positioning component 3. Before the pipe approaches, the motor inside the fixing plate 31 drives the first gear 312 to rotate and mesh with the first gear ring 311, causing the first rotating ring 39 to rotate. This causes the connecting rods 310 on the inner walls at both ends of the first rotating ring 39 to rotate, pulling the insertion rod 38 and the slider 34 along the groove 33. The internal movement brings the four sets of cylinders 35 together at the center. After the pipe cutting end contacts the circular plate 32, the motor drives the first gear 312 to rotate in the opposite direction, causing the connecting rod 310 to drive the four cylinders 35 to unfold outward until the cylinders 35 make contact with the inside of the pipe, thereby positioning the pipe and aligning the pipe's axis with the center of the circular plate 32 for easier subsequent laser cutting. The pressure plate 54 of the adjustment assembly 5 contacts the top outer wall of the pipe, and the initial position of the laser cutting device 46 of the cutting assembly 4 is adjusted simultaneously. The second electric push rod 52 drives the connecting frame 53 and the two side pressure plates 54 to move up and down, so that the pressure plate 54 covers the top of the pipe. Because the arc plate 511 and the arc block are inserted laterally, the pressure plate 54... The first vertical frame 41, the horizontal frame 45, the horizontal plate 42 and the laser cutting device 46 move synchronously along the inside of the second vertical frame 43. The initial position of the bottom of the laser cutting device 46 is adjusted according to the outer diameter of the pipe and close to the outer surface of the pipe. The arc plate 511 and the arc frame 510 rotate along the same path as the center of the circular plate 32. When the collar 37 drives the cutting assembly 4 to rotate, the arc plate 511 can be separated from the inside of the arc frame 510, and the first vertical frame 41 is separated from the pressure plate 54 without interference. The slide plate 412 and the inner wall of the second vertical frame 43 are in frictional sliding contact or magnetic adsorption. When there is no external force, the slide plate 412 can be kept in the position inside the second vertical frame 43, or the position of the slide plate 412 can be locked by bolts and adjusted according to the outer diameter of the pipe.The horizontal frame 45 of the cutting assembly 4 is adjusted to the bevel angle of the pipe fitting as needed. Cutting is performed by the laser cutting device 46. Based on the distance between the lowest and highest points of the bevel, the vertical screw 48 is driven to rotate by the motor built into the first vertical frame 41, causing the screw block 420 to move along the inside of the vertical groove 47. The moving frame 49 moves synchronously, adjusting the position of the limiting ring 410. Here, the limiting ring 410 and the moving frame 49 are connected to the horizontal plate 42 via a telescopic vertical frame 421. When the horizontal plate 42 moves to adjust the position of the laser cutting device 46, the moving frame 49 slides along the outer surface of the screw block 420, and the limiting ring 410 adjusts its position synchronously, maintaining the same position as the fixed ring 416. The height of the limiting ring 410 can be adjusted along the bevel by driving the vertical screw 48, thereby limiting the distance the laser cutting device 46 descends each time, maintaining the distance between the fixed ring 416 and the limiting ring 410 relative to the distance between the highest and lowest points of the bevel. Similarly, the telescopic vertical frame 421 can be understood as a telescopic plate structure. The obstruction-stopping motor 417 drives the sleeve frame 411 to rotate. Because the horizontal frame 45 is inserted into the sleeve frame 411, the horizontal frame 45 also rotates synchronously. The rotation angle is adjusted according to the inclination angle of the bevel. The laser cutting device 46 cuts the pipe. The first electric push rod 418 drives the laser cutting device 46 to descend, adjusting the cutting depth of the pipe. The specific depth is determined according to the bevel slope. The inclination angle of the horizontal frame 45 is kept consistent with the bevel slope angle, limiting the cutting position and cutting depth of the laser cutting device 46, and performing precise U-shaped bevel cutting. The first rotating ring 39 and the second rotating ring 313 of the positioning component 3 cooperate to make the laser cutting device 46 rotate around the periphery of the pipe to cut. The adjustment component 5 drives the laser cutting device 46 to move along the inside of the horizontal frame 45 and slide along the inside of the horizontal frame 45 to cut the bevel to different depths.The drive box 56 houses a motor and a transmission belt. Two pulleys on the transmission belt connect the motor output to the drive shaft 57. The drive shaft 57's arc-shaped block is inserted into the adjusting arc groove 59. The drive box 56 then drives the drive shaft 57 and the adjusting screw 58 to rotate, causing the horizontal plate 42 to move through the slide plate 412. This adjusts the positions of the laser cutting device 46 and the first vertical frame 41. The slide 414 of the first vertical frame 41 is an adjustable telescopic frame. After adjusting the initial positions of the first vertical frame 41 and the laser cutting device 46, the length of the slide 414 is locked, and then the adjusting screw 58 moves the horizontal plate 42. When the laser cutting device 46 moves toward the first vertical frame 41, the position of the first vertical frame 41 does not change, while the moving blocks 415 on both sides of the laser cutting device 46 slide along the horizontal frame 45 to perform bevel cutting. The drive box 56 and the connecting frame 53 are connected by the mounting plate 55, so the drive shaft 57 can move up and down together with the adjusting screw 58. The insertion of the arc groove 59 and the arc block is the same as the connection method of the arc plate 511 and the arc frame 510, all on the rotation path of the circular plate 32 to avoid interference. After the two sets of pipes are cut simultaneously, they are sent out from both ends of the conveyor table 1, and the debris generated by cutting is collected.

[0066] The foregoing has shown and described the basic principles and main features of the present invention and its advantages. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention.

[0067] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider 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 precise positioning method for automatic cutting and assembly of bevels in chemical pipelines, characterized in that, The cutting and precise positioning method includes the following steps: (1) Two pipe sections are fed in from both ends of the conveyor table, clamped on both sides of the pipe section, and connected to the positioning component by the conveyor roller on the conveyor table. The positioning component is pressed against the inner wall of the pipe section to keep the axis of the pipe section and the center of the circular plate of the positioning component on the same straight line. (2) Adjust the pressure plate of the component to contact the top outer wall of the pipe, and simultaneously adjust the initial position of the laser cutting end of the cutting component according to the outer diameter of the pipe. (3) The horizontal frame of the cutting assembly is adjusted to the bevel angle of the pipe fitting bevel as needed, and the cutting is carried out by the laser cutting device. The first and second rotating rings of the positioning assembly cooperate to make the laser cutting device rotate around the periphery of the pipe fitting for cutting. (4) The laser cutting device is driven to move along the inside of the horizontal frame by adjusting the components, and the bevel is cut to different depths by sliding along the inside of the horizontal frame; (5) After the two sets of pipe fittings are cut simultaneously, they are sent out from both ends of the conveyor table and the debris generated during cutting is collected.

2. The precise positioning method for automatic cutting and assembly of chemical pipeline beveling according to claim 1, characterized in that, As described in step (1), after the pipe is fed into the conveying platform, the conveying platform has moving slots on both sides, and two moving seats are symmetrically slidably connected inside the moving slots. A bidirectional screw is rotatably installed inside the moving slot on one side of the conveying platform. The moving seat is threaded onto the surface of the bidirectional screw. A top frame is fixed on the top of the moving seats at both ends of the conveying roller, and a bidirectional electric push rod is fixed on the top of the top frame. A bracket is slidably inserted inside the moving seat. A clamping frame is fixed at one end of the bracket facing the pipe. The outer end of the bracket is fixedly connected to the extended end of the bidirectional electric push rod. The bidirectional electric push rod drives the bracket and clamping frame to move, clamping the two sides of the pipe and keeping the pipe in the middle position of the conveying platform. The motor on the outer wall of the conveying platform drives the bidirectional screw to rotate. The moving seats at both ends of the moving slot and the bidirectional screw are threaded together and move towards the middle of the conveying platform. Because the clamping frame clamps the pipe, and in conjunction with the rotation of the conveying roller, the pipe is moved to the vicinity of the positioning component.

3. The precise positioning method for automatic cutting and assembly of chemical pipeline beveling according to claim 1, characterized in that, According to step (1), the positioning component includes a fixed plate, which is fixed in the middle of the conveyor table. Circular plates are fixed on both sides of the fixed plate. Four grooves are equidistantly opened on the surface of the circular plates, and sliders are slidably connected inside the grooves. A rod is slidably inserted inside the slider. A cylinder is fixed at one end of the rod facing the pipe. A first rotating ring is rotatably installed inside the fixed plate. The first rotating ring and the center of the circular plate are on the same straight line. Four connecting rods are equidistantly rotatably connected to the inner ring of the first rotating ring, and the other end of the connecting rod is rotatably connected to the rod through a rotating shaft. Before the pipe approaches, the pipe is positioned by the cylinder pressing against the inner wall of the pipe, so that the axis of the pipe and the center of the circular plate are on the same straight line.

4. The precise positioning method for automatic cutting and assembly of chemical pipeline beveling according to claim 3, characterized in that, The first rotating ring has a first toothed ring fixed to the outer ring of one end of the fixed plate. A first gear is rotatably installed on the top of the fixed plate corresponding to the side of the first toothed ring, and the first gear meshes with the first toothed ring. The motor inside the fixed plate drives the first gear to rotate and mesh with the first toothed ring, causing the first rotating ring to rotate. This causes the connecting rods on the inner walls of both ends of the first rotating ring to rotate and pull the insert rod and slider to move along the inside of the slide groove, bringing the four sets of cylinders together at the middle position. After the pipe cutting end contacts the circular plate, the motor drives the first gear to rotate in the opposite direction, causing the connecting rod to drive the four cylinders to unfold outward until the cylinders are pressed into contact with the inside of the pipe.

5. The precise positioning method for automatic cutting and assembly of chemical pipeline beveling according to claim 4, characterized in that, According to step (2), the cutting assembly includes a second vertical frame, a sliding plate is slidably connected inside the second vertical frame, a horizontal plate is slidably inserted inside the sliding plate, a laser cutting device is provided at the bottom of the horizontal plate near the end of the pipe, a first electric push rod is fixedly fixed at the top of the horizontal plate of the laser cutting device, and the extended end of the first electric push rod is fixedly connected to the top of the laser cutting device. A first vertical frame is provided on the side of the laser cutting device away from the second vertical frame, and a horizontal frame is slidably installed inside the first vertical frame. The laser cutting device is driven to descend by the first electric push rod to adjust the cutting depth of the pipe. The specific depth is determined according to the slope of the bevel.

6. The precise positioning method for automatic cutting and assembly of chemical pipeline beveling according to claim 5, characterized in that, The horizontal frame has inner grooves on both inner sides, and a moving block is slidably connected inside the inner groove. The two sides of the laser cutting device are rotatably connected to the moving block via a rotating shaft. A sleeve frame is rotatably installed on the inner walls of the two sides of the first vertical frame corresponding to the position of the horizontal frame. The two sides of the horizontal frame slide through the sleeve frame. An obstacle-detection stop motor is fixed on the outer wall of one side of the first vertical frame corresponding to the rotation position of the sleeve frame, and the output end of the obstacle-detection stop motor is fixedly connected to the rotation shaft of the sleeve frame. The obstacle-detection stop motor drives the sleeve frame to rotate, and the horizontal frame also rotates synchronously. The rotation angle is adjusted according to the inclination angle of the bevel. The laser cutting device cuts the pipe. The inclination angle of the horizontal frame is kept consistent with the bevel angle, which limits the cutting position and cutting depth of the laser cutting device to perform precise U-shaped bevel cutting.

7. The precise positioning method for automatic cutting and assembly of chemical pipeline beveling according to claim 6, characterized in that, The first vertical frame has a vertical groove on the side away from the motor that stops when encountering an obstacle. A vertical screw is rotatably installed inside the groove. A screw block is threaded onto the surface of the vertical screw. A movable frame is slidably inserted into the outer surface of the screw block. A limit ring is fixed to the bottom of the movable frame at the bottom of the laser cutting device. A fixed ring is fixed to the surface of the laser cutting device at the bottom of the horizontal frame. A telescopic vertical frame is fixed to the top of the movable frame, and the top of the telescopic vertical frame is fixedly connected to the horizontal plate. The vertical screw is driven to rotate by a motor built into the first vertical frame, causing the screw block to move along the inside of the vertical groove. The movable frame moves synchronously, adjusting the position of the limit ring. When the horizontal plate moves to adjust the position of the laser cutting device, the movable frame slides along the outer surface of the screw block, and the limit ring adjusts its position synchronously, keeping it in the same position as the fixed ring. The height of the limit ring can be adjusted along the bevel slope by driving the vertical screw, thereby limiting the distance the laser cutting device descends each time, keeping the distance between the fixed ring and the limit ring the same as the distance between the highest and lowest points of the bevel.

8. The precise positioning method for automatic cutting and assembly of chemical pipeline beveling according to claim 7, characterized in that, According to step (2), the adjustment assembly includes a fixed frame, fixed frames are fixed on both sides of the top of the fixed plate, and a second electric push rod is fixed inside the fixed frame. A connecting frame is fixed to the extended end of the second electric push rod. Pressure plates are fixed at the bottom of both ends of the connecting frame. The pressure plates are pressed against the top of the pipe. An arc frame is fixed on the side of the pressure plate facing the bottom of the first vertical frame. An arc plate is slidably inserted inside the arc frame. The arc plate is fixedly connected to the bottom of the first vertical frame. The second electric push rod drives the connecting frame and the pressure plates on both sides to move up and down, so that the pressure plate covers the top of the pipe. Because the arc plate and the arc block are inserted horizontally, the pressure plate drives the first vertical frame, the horizontal frame, the horizontal plate and the laser cutting device to move synchronously along the inside of the second vertical frame. The initial position of the bottom of the laser cutting device is adjusted according to the outer diameter of the pipe, close to the outer surface of the pipe. The arc plate and the arc frame are aligned with the rotation path of the center of the circular plate.

9. The precise positioning method for automatic cutting and assembly of chemical pipeline beveling according to claim 8, characterized in that, According to step (3), the positioning component further includes a second rotating ring. The fixing plate is rotatably mounted on the outer ring of the first rotating ring. The two ends of the second rotating ring pass through the fixing plate. The outer ring of the second rotating ring away from the first toothed ring is fixed with a second toothed ring. The bottom of the fixing plate is rotatably mounted on the outer ring of the second toothed ring. The second gear meshes with the second toothed ring. The fixing plate is equipped with a connection that drives the second gear to rotate. The outer ring of the circular plate is rotatably sleeved with a shaft collar. A connecting rod is fixed at equal distances between the two shaft collars and the connecting rod passes through the second rotating ring. The bottom of the second vertical frame is fixed with a fixing seat, and the fixing seat is fixed on the shaft collar. The motor inside the fixing plate drives the second gear to rotate and mesh with the second toothed ring, so that the two shaft collars rotate along the outer ring of the circular plate under the drive of the second rotating ring and the connecting rod. Because the fixing seat connects the shaft collar and the second vertical frame, the cutting component rotates in a ring with the shaft collar, thereby performing a ring-shaped U-shaped bevel cut on the cutting end of the pipe fitting.

10. The precise positioning method for automatic cutting and assembly of chemical pipeline beveling according to claim 9, characterized in that: According to step (4), the adjustment assembly further includes an adjustment screw. The adjustment screw is rotatably mounted on the top of the slide plate. The end of the slide plate away from the first electric push rod is threaded onto the surface of the adjustment screw. A drive box is provided on the top of the fixed plate between the two sets of adjustment screws. Drive shafts are rotatably protruding from both ends of the drive box. An arc groove is opened at the end of the adjustment screw facing the drive shaft. The drive shaft is inserted into the slide groove through an arc block. An mounting plate is fixed on the top of the drive box. The other end of the mounting plate is fixedly connected to the connecting frame. Side grooves are opened on both sides of the slide plate. A slide is fixed at both ends of the top of the first vertical frame. The slide slides along the inside of the side groove. The arc block of the drive shaft is inserted into the adjustment arc groove. The drive box can drive the rotation of the drive shaft and the adjustment screw, so that the slide plate moves through the slide plate and adjusts the position of the laser cutting device and the first vertical frame. The moving blocks on both sides of the laser cutting device slide along the horizontal frame to perform bevel cutting on the bevel.

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