An automatic cutting device for air duct processing

Abstract

The application relates to the technical field of laser cutters, and discloses an automatic cutting device for air pipe machining, which comprises a quick clamping mechanism and a sliding feeding mechanism, and the structure comprises two sliding sleeves capable of sliding along a horizontal sliding rod and driving the laser cutter to move, an oil storage cavity capable of storing appropriate lubricating oil and arranged in the sliding sleeve, and a driving rod arranged between the two sliding sleeves and facilitating manual force application. The automatic cutting device for air pipe machining can be directly installed at the symmetrical corners of the cutting surface of a rectangular air pipe, and during positioning and installation, the device can realize reverse synchronous movement of the clamping seat, so that the equipment can be quickly clamped at the required position; in addition, during the cutting process, the device can ensure the cutting distance between the laser cutter and the iron sheet, and the laser cutter can be pushed to realize cutting, so that the cutting efficiency of the equipment is improved.

Description

Technical Field

[0001] This invention relates to the field of laser cutter technology, specifically to an automated cutting device for duct processing. Background Technology

[0002] As the core channel of ventilation, air conditioning, and smoke control systems, air ducts are responsible for transporting and guiding various airflows, completing functions such as fresh air intake, stale air exhaust, hot and cold air delivery, and smoke exhaust during fires, optimizing the indoor air environment, and meeting the requirements of building ventilation, temperature control, and fire safety.

[0003] During the production process of air ducts, cutting devices are required to cut them into the required dimensions. There are two main types of cutting devices: one is rotary cutting with a cutting blade, which has low cutting efficiency, and for structures with thin sheet metal, the rigid contact of the cutting blade can cause the air duct to deform along the cutting direction, resulting in poor cutting stability; the other is laser cutting, which has high precision, high speed, smooth cut with minimal deformation, is suitable for a variety of materials, and has a high degree of automation.

[0004] The existing laser cutting structure mainly includes a laser cutter, a cutting feed mechanism for driving the directional movement of the clamping base, and a clamping base for fixing and driving the air duct. During operation, the air duct needs to be fixedly installed at the corresponding clamping position of the clamping base, and then the laser cutter is turned on. At this time, the laser cutter cuts the air duct. During the cutting process, it is necessary to control the cutting feed mechanism to flip the air duct (the cutting of the air duct often involves removing the ring-shaped sheet metal), thereby achieving the cutting of the entire air duct.

[0005] Laser cutters present the following challenges when cutting ductwork: First, the distance between the laser cutter and the outer wall of the duct changes when the duct is flipped by the cutting feed mechanism (during the cutting process, the distance between the laser cutter and the sheet metal needs to be kept within a reasonable range, otherwise insufficient cutting power will occur). To adapt to these changes, the height of the laser cutter needs to be adjusted, making the entire process cumbersome and severely impacting cutting efficiency. Second, when cutting large ductwork, flipping and moving the duct becomes even more difficult, further reducing the cutting efficiency of the equipment. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an automated cutting device for duct processing. This device can be directly installed at the symmetrical corners of the cut surface of a rectangular duct. During the positioning and installation process, the device can achieve reverse synchronous movement of the clamping seat, thereby quickly clamping the equipment in the required position. Furthermore, during the cutting process, the device can ensure the cutting distance between the laser cutter and the sheet metal, and cutting can be achieved simply by pushing the laser cutter, thus improving the cutting efficiency of the equipment and solving the aforementioned technical problems.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automated cutting device for duct processing, comprising a laser cutter capable of cutting ducts and two L-shaped clamps capable of being locked at two corners of the cut surface, and a quick clamping mechanism, the structure of which includes a first moving base and a second moving base capable of driving the two L-shaped clamps to move respectively, a first threaded rod and a second threaded rod capable of driving the first moving base and the second moving base to move in an directional manner when rotating, and a horizontal slide rod capable of limiting the horizontal movement of the first moving base and the second moving base; and a sliding feed mechanism, the structure of which includes two sliding sleeves capable of sliding along the horizontal slide rod and driving the laser cutter to move, an oil storage cavity disposed inside the sliding sleeves and capable of storing an appropriate amount of lubricating oil, and a drive rod disposed between the two sliding sleeves for easy manual force application.

[0008] Preferably, the top and corners of the L-shaped card holder are provided with corner cutting notches for the laser cutter to cut the clamped part.

[0009] Preferably, the quick-clamping mechanism further includes two symmetrically arranged side limiting plates. Each side limiting plate has a shaft mounting hole at its center. A rotatable central shaft is mounted inside each shaft mounting hole via a bearing. A handwheel is fixedly fitted to the end of one of the central shafts. A first-threaded rod and a second-threaded rod are fixedly mounted on opposite ends of the two central shafts via couplings. The first-threaded rod and the second-threaded rod are fixedly connected at opposite ends via mating plates. A horizontal sliding rod is fixedly mounted at the symmetrical corner of each of the two side limiting plates. The first movable base has a first internal threaded hole at its center, which is installed on the body of the first threaded rod through a first threaded structure. The second movable base has a second internal threaded hole at its center, which is installed on the body of the second threaded rod through a second threaded structure. The first and second movable bases are provided with a first sliding hole that can slide along a horizontal sliding rod. The bottom of the first and second movable bases are respectively equipped with a first curved linkage plate and a second curved linkage plate. The bottom end of the first and second curved linkage plates is respectively provided with a first fixing port and a second fixing port in a horizontal state.

[0010] Preferably, the centerline of the first threaded rod and the centerline of the second threaded rod are on the same straight line, and the centerlines of the two horizontal sliding rods are on the same horizontal plane as the aforementioned straight line.

[0011] Preferably, the center line of the first fixing port and the center line of the second fixing port are on the same horizontal line.

[0012] Preferably, the first thread structure includes an internal thread structure disposed on the inner wall of the first internal thread hole and an external thread structure disposed on the first thread rod body, and the second thread structure includes an internal thread structure disposed on the inner wall of the second internal thread hole and an external thread structure disposed on the second thread rod body, and the helical direction of the first thread structure and the helical direction of the second thread structure are symmetrically arranged about the mating disc.

[0013] Preferably, the sliding feed mechanism further includes a second sliding hole disposed in the sliding sleeve and fitted onto the horizontal sliding rod body. The two sliding sleeves are fixedly connected at their upper sides by an upper connecting plate. An upwardly extending drive rod is disposed at the top center of the upper connecting plate. The two sliding sleeves are fixedly connected at their lower sides by a lower connecting plate. The bottom surface of the lower connecting plate is provided with a downwardly protruding mounting head that is fixedly installed on the mounting end face of the laser cutter. Each sliding sleeve has an oil storage cavity disposed around the middle area of ​​the second sliding hole. A sealing ring capable of preventing liquid leakage is installed on the intersection end face of the oil storage cavity and the second sliding hole. An oil injection channel communicating with the side of the oil storage cavity is disposed on one side of the sliding sleeve. A valve core capable of controlling the direction of liquid flow is installed in the oil injection channel.

[0014] Preferably, it also includes a pre-tightening clamping mechanism, the structure of which includes a hollow clamping tube fixedly installed in the first fixing port and the second fixing port and having a hollow internal structure, an internal movable plate placed in the hollow clamping tube and capable of moving the L-shaped card seat, and a helical spring placed in the hollow clamping tube and capable of producing an elastic damping effect on the internal movable plate.

[0015] Preferably, the pre-tightening clamping mechanism further includes a fixing ring groove disposed on the hollow clamping tube body and fixedly installed inside the first fixing port and the second fixing port. The hollow clamping tube has a horizontal component movable cavity inside. One end of the hollow clamping tube has a rod through hole connecting the external space and one end of the horizontal component movable cavity. The other end of the hollow clamping tube has a gas compensation hole connecting the external space and the other end of the horizontal component movable cavity. An internal movable plate capable of moving along its axial direction is placed in the horizontal component movable cavity. A compressed helical spring is placed on the end of the internal movable plate facing the gas compensation hole. A horizontal telescopic rod passing through the rod through hole is fixedly installed on the end of the internal movable plate facing the rod through hole. The end of the horizontal telescopic rod located outside the hollow clamping tube is fixedly connected to the longitudinal structure of the L-shaped card seat.

[0016] Preferably, the structural shape of the perforated cross section of the rod is consistent with the structural shape of the cross section of the horizontal telescopic rod, both being polygonal structures, and the structural dimensions of the perforated cross section of the rod match the structural dimensions of the cross section of the horizontal telescopic rod.

[0017] Compared with the prior art, the present invention provides an automated cutting device for duct processing, which has the following advantages: 1. It can be directly installed at the symmetrical corner of the cut surface of a rectangular duct. During the positioning and installation process, the device can realize the reverse synchronous movement of the clamping seat, thereby quickly clamping the equipment in the required position. In addition, during the cutting process, the device can ensure the cutting distance between the laser cutter and the sheet metal, and the cutting can be achieved by pushing the laser cutter, thereby improving the cutting efficiency of the equipment.

[0018] 2. Equipped with a quick-clamping mechanism, it adopts a structure that combines a bidirectional threaded rod with a horizontal slide bar. The coaxial No. 1 and No. 2 threaded rods are driven to rotate by a hand crank, which drives the No. 1 and No. 2 moving bases to move synchronously in opposite directions along the slide bar. With the help of the curved linkage plate, the L-shaped clamp can be quickly clamped at the symmetrical corner of the rectangular duct cutting surface. The positioning is accurate and the clamping is efficient. At the same time, the horizontal slide bar can restrict the movement direction of the base to ensure smooth movement. The overall structure is simple and easy to operate, which can significantly improve the clamping efficiency and positioning accuracy before duct cutting.

[0019] 3. Equipped with a sliding feed mechanism, the core moving component is a sliding sleeve fitted onto a horizontal slide bar. Together with the upper and lower connecting plates and the drive rod, they form an integrated sliding structure. Pushing the drive rod causes the laser cutter to feed steadily and linearly along the horizontal slide bar, maintaining a constant distance between the laser cutter and the duct throughout the entire process, eliminating the need for manual height adjustment. The sliding sleeve contains an oil reservoir, a sealing ring, and an oil injection channel, enabling self-lubrication and preventing oil leakage, significantly reducing sliding resistance. Simultaneously, the cooperation between the sliding sleeve and the horizontal slide bar strictly limits the feed direction, ensuring a straight cutting path and a clean cut. The overall structure is simple, operation is labor-saving, and effectively improves the efficiency and quality of duct cutting.

[0020] 4. Equipped with a pre-tightening clamping mechanism, it adopts a structure in which a hollow clamping tube with an internal compression helical spring, a polygonal horizontal telescopic rod, and an L-shaped card seat are connected. During clamping, the elastic reaction force of the helical spring provides a continuous pre-tightening force to the card seat, which can adaptively fit the side wall of the air duct and maintain stable clamping, effectively preventing loosening and displacement during cutting. The polygonal rod and the through hole can prevent the telescopic rod from rotating, ensuring accurate clamping direction. The gas compensation hole makes the internal movement smoother. The overall elastic buffer and firm clamping greatly improve the stability of the cutting process and the adaptability of the device. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the present invention; Figure 3 This is a perspective view of the rapid clamping mechanism in this invention; Figure 4 This is a three-dimensional cross-sectional view of the rapid clamping mechanism in this invention; Figure 5 This is a three-dimensional cross-sectional view of the sliding feed mechanism in this invention from a first perspective. Figure 6 This is a three-dimensional cross-sectional view of the sliding feed mechanism in this invention from a second perspective. Figure 7 This is a perspective view of the pre-tightening clamping mechanism in this invention; Figure 8 This is a three-dimensional cross-sectional view of the pre-tightening clamping mechanism in this invention.

[0022] The components include: 1. Laser cutter; 2. L-shaped holder; 3. Corner cutting notch; 4. Quick clamping mechanism; 41. Side limiting plate; 42. Shaft mounting hole; 43. Central rotating shaft; 44. Hand crank; 45. Coupling; 46. Horizontal slide bar; 47. Connecting plate; 48. Threaded rod No. 1; 49. Threaded rod No. 2; 410. Moving base No. 1; 411. Moving base No. 2; 412. Curved linkage plate No. 1; 413. Curved linkage plate No. 2; 414. Fixing port No. 1; 415. Fixing port No. 2; 416. Sliding hole No. 1; 41 7. No. 1 internal threaded hole; 418. No. 2 internal threaded hole; 5. Sliding feed mechanism; 51. Sliding sleeve; 52. Upper connecting plate; 53. Drive rod; 54. Lower connecting plate; 55. Protruding mounting head; 56. Oil storage chamber; 57. Sealing ring; 58. Oil injection channel; 59. Valve core; 510. No. 2 sliding hole; 6. Pre-tightening clamping mechanism; 61. Hollow clamping tube; 62. Fixed ring groove; 63. Horizontal component movable cavity; 64. Rod through hole; 65. Gas compensation hole; 66. Built-in movable plate; 67. Helical spring; 68. Horizontal telescopic rod. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figure 1 and Figure 2 An automated cutting device for duct processing includes a laser cutter 1 capable of cutting ducts and two L-shaped clamps 2 capable of clamping at two corners of the cut surface. In order to ensure the integrity of the cutting stroke, the top and corners of the L-shaped clamps 2 need to be provided with corner cutting notches 3 for the laser cutter 1 to cut the clamped part.

[0025] For quick installation of rectangular ducts, please refer to [link / reference]. Figure 1 , Figure 2 , Figure 3 and Figure 4A quick-clamping mechanism 4 is required, which includes a first movable base 410 and a second movable base 411 capable of moving two L-shaped clamping seats 2 respectively; a first threaded rod 48 and a second threaded rod 49 capable of directional movement of the first movable base 410 and the second movable base 411 respectively during rotation; and a horizontal slide rod 46 capable of limiting the horizontal movement of the first movable base 410 and the second movable base 411. The hand crank 44 is rotated directionally. Due to the presence of the first and second threaded structures and the horizontal limiting function of the horizontal slide rod 46, the first movable base 410 and the second movable base 411 will move directionally. Furthermore, because the spiral direction of the No. 1 thread structure and the spiral direction of the No. 2 thread structure are symmetrically arranged about the docking plate 47, the No. 1 moving base 410 and the No. 2 moving base 411 will move away from each other or move closer to each other. By controlling the rotation of the hand crank 44, the No. 1 moving base 410 and the No. 2 moving base 411 will move closer to each other until the L-shaped card holder 2 is stuck at the two symmetrical corners of the rectangular duct cut surface. At this time, it should be noted that the corner cutting notch 3 is located at the cutting boundary line, that is, the cutting boundary line of the duct is exposed through the corner cutting notch 3 to ensure that the cutting route is carried out in the predetermined direction.

[0026] For details regarding the specific structure of the quick-clamping mechanism 4, please refer to [link / reference]. Figure 3 and Figure 4It also includes two symmetrically arranged side limiting plates 41, each side limiting plate 41 having a shaft mounting hole 42 at its center. Each shaft mounting hole 42 houses a rotatable central shaft 43 mounted inside via a bearing. One of the central shafts 43 has a hand crank 44 fixedly fitted at its end. The two central shafts 43 are respectively fixedly mounted with a first threaded rod 48 and a second threaded rod 49 at their opposite ends via a coupling 45. The first threaded rod 48 and the second threaded rod 49 are connected at their opposite ends by a mating plate. 47. A horizontal sliding rod 46 is fixedly installed at the symmetrical corners of the two side limiting plates 41. The center of the first moving base 410 is provided with a first internal thread hole 417 that is installed on the body of the first threaded rod 48 through a first threaded structure. The center of the second moving base 411 is provided with a second internal thread hole 418 that is installed on the body of the second threaded rod 49 through a second threaded structure. The first moving base 410 and the second moving base 411 are provided with first sliding holes that can slide along the horizontal sliding rod 46. 416. A first curved linkage plate 412 and a second curved linkage plate 413 are respectively installed at the bottom of the first movable base 410 and the second movable base 411. The bottom ends of the first curved linkage plate 412 and the second curved linkage plate 413 are respectively provided with horizontally positioned first fixing port 414 and second fixing port 415. The axis of the first threaded rod 48 and the axis of the second threaded rod 49 are on the same straight line. The axis of the two horizontal sliding rods 46 is on the same horizontal plane as the aforementioned straight line. The first fixed... The centerline of the fixed opening 414 and the centerline of the second fixed opening 415 are on the same horizontal line. The first thread structure includes an internal thread structure set on the inner wall of the first internal thread hole 417 and an external thread structure set on the body of the first thread rod 48. The second thread structure includes an internal thread structure set on the inner wall of the second internal thread hole 418 and an external thread structure set on the body of the second thread rod 49. The helical direction of the first thread structure and the helical direction of the second thread structure are symmetrically arranged about the mating plate 47.

[0027] To achieve directional feeding of the laser cutter 1, please refer to... Figure 1 , Figure 2 , Figure 5 and Figure 6A sliding feed mechanism 5 is required, which includes two sliding sleeves 51 that can slide along the horizontal slide bar 46 and drive the laser cutter 1 to move, an oil storage cavity 56 located inside the sliding sleeves 51 and capable of storing an appropriate amount of lubricating oil, and a drive rod 53 located between the two sliding sleeves 51 for easy manual force application. A directional force is applied to the drive rod 53. Under this force, the drive rod 53 will drive the two sliding sleeves 51 to move horizontally along the horizontal slide bar 46 through the upper connecting plate 52, while the sliding sleeves 51 will drive the laser cutter 1 to slide directionally through the lower connecting plate 54, thereby performing sliding cuts on the air duct to improve cutting efficiency and reduce cutting difficulty.

[0028] For details regarding the specific structure of the sliding feed mechanism 5, please refer to [link / reference]. Figure 5 and Figure 6 It also includes a second sliding hole 510 disposed in the sliding sleeve 51 and fitted onto the body of the horizontal sliding rod 46. The two sliding sleeves 51 are fixedly connected at their upper sides by an upper connecting plate 52. The upper connecting plate 52 has an upwardly extending drive rod 53 at its top center. The two sliding sleeves 51 are fixedly connected at their lower sides by a lower connecting plate 54. The bottom surface of the lower connecting plate 54 has a downwardly protruding protruding mounting head 55 that is fixedly installed on the mounting end face of the laser cutter 1. Each sliding sleeve 51 has an oil storage cavity 56 in the outer periphery of the middle area of ​​the second sliding hole 510. The sliding sleeve 51 has a sealing ring 57 installed at the intersection of the oil storage cavity 56 and the second sliding hole 510 to prevent liquid leakage. One side of the sliding sleeve 51 has an oil injection channel 58 that connects to the side of the oil storage cavity 56. A valve core 59 that controls the direction of liquid flow is installed in the oil injection channel 58.

[0029] To achieve the pre-tightening clamping function on the duct sidewall, please refer to... Figure 1 , Figure 2 , Figure 7 and Figure 8 A pre-tightening clamping mechanism 6 needs to be set up. Its structure includes a hollow clamping tube 61 fixedly installed in the first fixing port 414 and the second fixing port 415 and having a hollow internal structure; an internal movable plate 66 placed in the hollow clamping tube 61 and capable of moving the L-shaped card seat 2; and a spiral spring 67 placed in the hollow clamping tube 61 and capable of providing elastic damping to the internal movable plate 66. The moving first curved linkage plate 412 and the second curved linkage plate 413 will cause the two hollow clamping tubes 61 to move closer to each other. When the two L-shaped card seats 2 are clamped at the two symmetrical corners of the rectangular air duct being cut, the continued movement of the hollow clamping tubes 61 will cause the spiral spring 67 to be continuously compressed. Under the reaction force of the spiral spring 67, the spiral spring 67 will cause the L-shaped card seat 2 to pre-tighten and clamp the symmetrical sides of the rectangular air duct to improve the anti-interference ability of the equipment during the cutting process.

[0030] For details regarding the structure of the pre-tightening clamping mechanism 6, please refer to [link / reference]. Figure 7 and Figure 8 It also includes a fixing annular groove 62 disposed on the body of the hollow clamping tube 61 and fixedly installed inside the first fixing port 414 and the second fixing port 415. The hollow clamping tube 61 has a horizontal component movable cavity 63 inside. One end of the hollow clamping tube 61 has a rod through hole 64 connecting the external space and one end of the horizontal component movable cavity 63. The other end of the hollow clamping tube 61 has a gas compensation hole 65 connecting the external space and the other end of the horizontal component movable cavity 63. An internal movable plate 66 capable of moving along its axial direction is placed in the horizontal component movable cavity 63. A compressed helical spring 67 is placed at one end facing the gas compensation hole 65. A horizontal telescopic rod 68 is fixedly installed at one end of the built-in movable plate 66 facing the rod through hole 64. The horizontal telescopic rod 68 is fixedly connected to the longitudinal structure of the L-shaped card seat 2 at one end located outside the hollow clamping tube 61. The cross-sectional shape of the rod through hole 64 is consistent with the cross-sectional shape of the horizontal telescopic rod 68, both being polygonal structures. The cross-sectional dimensions of the rod through hole 64 match the cross-sectional dimensions of the horizontal telescopic rod 68.

[0031] When in use, the hand crank 44 is rotated in a directional manner. Due to the presence of the No. 1 and No. 2 threaded structures and the horizontal limiting function of the horizontal slide bar 46, the No. 1 moving base 410 and the No. 2 moving base 411 will move in a directional manner. Since the helical direction of the No. 1 threaded structure and the helical direction of the No. 2 threaded structure are symmetrically arranged about the docking plate 47, the No. 1 moving base 410 and the No. 2 moving base 411 will move away from each other or move closer to each other. By controlling the direction of the hand crank 44, the No. 1 moving base 410 and the No. 2 moving base 411 will move closer to each other until the L-shaped card holder 2 is stuck at the two symmetrical corners of the cut surface of the rectangular air duct. At this time, it should be noted that the corner cutting notch 3 is located at the cutting boundary line, that is, the cutting boundary line of the air duct is exposed through the corner cutting notch 3. The moving No. 1 curved linkage plate 412 and No. 2 curved linkage plate 413 will drive the two hollow clamping tubes 61 to move closer to each other. When the two L-shaped clamps 2 are clamped at the two symmetrical corners of the cut surface of the rectangular air duct, the continued movement of the hollow clamping tubes 61 will cause the helical spring 67 to be continuously compressed. Under the reaction force of the helical spring 67, the helical spring 67 will cause the L-shaped clamps 2 to pre-tighten the symmetrical sides of the rectangular air duct. A directional force is applied to the drive rod 53. Under this force, the drive rod 53 will drive the two sliding sleeves 51 to move horizontally along the horizontal sliding rod 46 through the upper connecting plate 52. The sliding sleeves 51 will drive the laser cutter 1 to slide directionally through the lower connecting plate 54, thereby performing sliding cut on the air duct.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automated cutting device for duct processing, comprising a laser cutter (1) capable of cutting ducts and two L-shaped clamps (2) capable of being clamped at two corners of the cut surface, characterized in that: It also includes, The quick clamping mechanism (4) includes a first movable base (410) and a second movable base (411) that can drive the two L-shaped card seats (2) to move respectively, a first threaded rod (48) and a second threaded rod (49) that can drive the first movable base (410) and the second movable base (411) to move in an directional manner when rotating, and a horizontal slide rod (46) that can limit the horizontal movement of the first movable base (410) and the second movable base (411). And a sliding feed mechanism (5), the structure of which includes two sliding sleeves (51) that can slide along the horizontal slide bar (46) and drive the laser cutter (1) to move, an oil storage chamber (56) that is located inside the sliding sleeve (51) and can store an appropriate amount of lubricating oil, and a drive rod (53) that is located between the two sliding sleeves (51) and is convenient for manual force application.

2. The automated cutting device for duct processing according to claim 1, characterized in that: The L-shaped card holder (2) is provided with corner cutting notches (3) at the top and corners for the laser cutter (1) to cut the clamped part.

3. The automated cutting device for duct processing according to claim 2, characterized in that: The quick clamping mechanism (4) also includes two symmetrically arranged side limiting plates (41). Each side limiting plate (41) has a shaft mounting hole (42) at its center. Each shaft mounting hole (42) has a rotating central shaft (43) mounted inside it via a bearing. A hand crank (44) is fixedly fitted at the end of one of the central shafts (43). The two central shafts (43) are respectively fixedly mounted with a first threaded rod (48) and a second threaded rod (49) at their opposite ends via a coupling (45). The first threaded rod (48) and the second threaded rod (49) are fixedly connected at their opposite ends via a mating plate (47). A horizontal sliding rod (46) is fixedly installed at the symmetrical corner of each of the two side limiting plates (41). The first movable base (410) The center of the first movable base (410) is provided with a first internal thread hole (417) installed on the body of the first thread rod (48) through a first thread structure. The center of the second movable base (411) is provided with a second internal thread hole (418) installed on the body of the second thread rod (49) through a second thread structure. The first movable base (410) and the second movable base (411) are provided with a first sliding hole (416) that can slide along the horizontal sliding rod (46). The bottom of the first movable base (410) and the second movable base (411) are respectively provided with a first curved linkage plate (412) and a second curved linkage plate (413). The bottom end of the first curved linkage plate (412) and the second curved linkage plate (413) are respectively provided with a first fixed port (414) and a second fixed port (415) in a horizontal state.

4. The automated cutting device for duct processing according to claim 3, characterized in that: The axis of the first threaded rod (48) and the axis of the second threaded rod (49) are on the same straight line, and the axis of the two horizontal sliding rods (46) are on the same horizontal plane as the above straight line.

5. The automated cutting device for duct processing according to claim 4, characterized in that: The centerline of the first fixed port (414) and the centerline of the second fixed port (415) are on the same horizontal line.

6. The automated cutting device for duct processing according to claim 5, characterized in that: The first thread structure includes an internal thread structure located on the inner wall of the first internal thread hole (417) and an external thread structure located on the body of the first thread rod (48). The second thread structure includes an internal thread structure located on the inner wall of the second internal thread hole (418) and an external thread structure located on the body of the second thread rod (49). The helical direction of the first thread structure and the helical direction of the second thread structure are symmetrically arranged about the mating disc (47).

7. An automated cutting device for duct processing according to claim 6, characterized in that: The sliding feed mechanism (5) further includes a second sliding hole (510) disposed in the sliding sleeve (51) and fitted onto the body of the horizontal sliding rod (46). The two sliding sleeves (51) are fixedly connected at their upper sides by an upper connecting plate (52). An upwardly extending drive rod (53) is provided at the top center of the upper connecting plate (52). The two sliding sleeves (51) are fixedly connected at their lower sides by a lower connecting plate (54). The bottom surface of the lower connecting plate (54) is provided with a downward protrusion and is fixedly installed on the laser cutting surface. The device (1) has a protruding mounting head (55) on the mounting end face. Each of the sliding sleeves (51) has an oil storage cavity (56) around the middle area of ​​the second sliding hole (510). The sliding sleeve (51) is equipped with a sealing ring (57) that can prevent liquid leakage at the intersection end face of the oil storage cavity (56) and the second sliding hole (510). One side of the sliding sleeve (51) is provided with an oil injection channel (58) that connects to the side of the oil storage cavity (56). A valve core (59) that can control the direction of liquid flow is installed in the oil injection channel (58).

8. An automated cutting device for duct processing according to any one of claims 2-7, characterized in that: It also includes a pre-tightening clamping mechanism (6), the structure of which includes a hollow clamping tube (61) fixedly installed in the first fixing port (414) and the second fixing port (415) and having a hollow internal structure, an internal movable plate (66) placed in the hollow clamping tube (61) and capable of moving the L-shaped card seat (2), and a helical spring (67) placed in the hollow clamping tube (61) and capable of producing an elastic damping effect on the internal movable plate (66).

9. An automated cutting device for duct processing according to claim 8, characterized in that: The pre-tightening clamping mechanism (6) further includes a fixing ring groove (62) disposed on the body of the hollow clamping tube (61) and fixedly installed inside the first fixing port (414) and the second fixing port (415). The hollow clamping tube (61) has a horizontal component movable cavity (63) inside. One end of the hollow clamping tube (61) has a rod through hole (64) connecting the external space and one end of the horizontal component movable cavity (63). The other end of the hollow clamping tube (61) has a gas compensation that connects the external space and the other end of the horizontal component movable cavity (63). The horizontal component movable cavity (63) is equipped with a built-in movable plate (66) that can move along its axial direction. A coil spring (67) in a compressed state is placed at the end of the built-in movable plate (66) facing the gas compensation hole (65). A horizontal telescopic rod (68) passing through the rod through hole (64) is fixedly installed at the end of the built-in movable plate (66) facing the rod through hole (64). The horizontal telescopic rod (68) is fixedly connected to the longitudinal structure of the L-shaped card seat (2) at the end located outside the hollow clamping tube (61).

10. An automated cutting device for duct processing according to claim 9, characterized in that: The cross-sectional shape of the rod through hole (64) is consistent with the cross-sectional shape of the horizontal telescopic rod (68), both being polygonal structures, and the structural dimensions of the cross-sectional shape of the rod through hole (64) match the structural dimensions of the cross-sectional shape of the horizontal telescopic rod (68).

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