Automatic pipe cutting machine for improving cutting quality

Abstract

The utility model belongs to the technical field of pipe cutting auxiliary equipment. The problem that in the prior art, the cutting quality is poor when a pipe is cut manually is solved. The automatic pipe cutting machine comprises a machine frame and a cutting device arranged on the machine frame, and the cutting device comprises a fixing frame connected to the machine frame in a sliding mode and a sleeve connected to the fixing frame in a rotating mode. The fixing frame is provided with a driving assembly and two clamping assemblies which are located at the two ends of the sleeve correspondingly and used for clamping a pipe, the fixing frame is further provided with a heating device used for preheating the pipe, and at least two sliding assemblies are located in the circumferential direction of the sleeve. A cutting blade and a first roller which are oppositely arranged in the radial direction of the sleeve are installed on the two sliding assemblies correspondingly, and the two sliding assemblies can synchronously slide in the radial direction of the sleeve under driving of the driving assembly so that the cutting blade and the first roller can get close to each other or get away from each other. The automatic pipe cutting machine has the advantage of being capable of achieving rapid and high-quality automatic cutting of pipes.

Description

Technical Field

[0001] This utility model belongs to the technical field of pipe cutting auxiliary equipment, and relates to an automatic pipe cutting machine for improving cutting quality. Background Technology

[0002] Plastic pipes, as an important component of chemical building materials, are widely accepted by users due to their superior performance, hygiene, environmental friendliness, and low consumption. They are widely used in building water supply and drainage, urban and rural water supply and drainage, urban gas, power and fiber optic cable sheathing, industrial fluid transportation, agricultural irrigation, and other construction, municipal, industrial, and agricultural fields. Currently, there are many specifications and models of plastic pipes. They are generally cut manually using a cutting device consisting of a motor and a saw blade. During the process of the saw blade rotating and rubbing against the pipe, not only are chips easily generated, but it is also easy to cause serious deformation of the pipe ends, large burrs, and chipping. Furthermore, sawdust dust is generated during the cutting process, all of which pose certain hazards to the environment and human health. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an automatic pipe cutting machine to improve cutting quality. The technical problem this invention aims to solve is how to achieve rapid and high-quality automatic cutting of pipes.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] An automatic pipe cutting machine for improving cutting quality includes a frame and a cutting device mounted on the frame. The cutting device comprises a fixed frame slidably connected to the frame and a sleeve rotatably connected to the fixed frame. The fixed frame is equipped with a drive assembly and two clamping assemblies located at opposite ends of the sleeve for clamping the pipe. The fixed frame also includes a heating device for preheating the pipe. At least two sliding assemblies are circumferentially positioned on the sleeve. Each of the two sliding assemblies is equipped with a cutting blade and a first roller arranged radially opposite to each other along the sleeve. Driven by the drive assembly, the two sliding assemblies can synchronously slide along the radial direction of the sleeve, causing the cutting blade and the first roller to move closer or further apart.

[0006] This automatic pipe cutting machine, designed to improve cutting quality, is directly connected to a pipe extruder. It enables rapid and high-quality automatic cutting of pipes of different diameters. Its working principle is as follows: When the pipe is extruded through the extruder, it enters from one end of the sleeve and exits from the other end. The clamping assembly clamps the pipe, keeping it stationary relative to the fixed frame. The heating device preheats the pipe before cutting. As the extruder continuously extrudes the pipe, the fixed frame and cutting device slide synchronously on the frame as the pipe moves. During this process, the sleeve rotates relative to the fixed frame. The sliding assembly, cutting blade, and first roller all rotate together with the sleeve. Subsequently, the sliding assembly performs a feeding action under the drive of the drive assembly, that is, the sliding assembly moves radially along the sleeve, so that the cutting blade and first roller approach each other until the cutting blade and first roller simultaneously contact the pipe. The cutting blade and first roller synchronously rotate around the circumference of the pipe and perform radial feeding action, thereby achieving annular cutting of the pipe.

[0007] After cutting, the extruded pipe is pushed out, then the fixed frame resets, and the drive assembly controls the sliding assembly, cutting blade, rollers, and other components to reset. The process is then repeated for the next cutting operation. This automatic pipe cutter, designed to improve cutting quality, eliminates the need for manual operation. It not only cuts quickly but also preheats the pipe before cutting, significantly reducing the probability of cracking and burrs during cutting. Furthermore, the circular cutting method using the cutting blade and the first roller avoids excessive pressure on the pipe end, preventing deformation or large burrs, resulting in high-quality cutting.

[0008] In the aforementioned automatic pipe cutting machine for improving cutting quality, the heating device is arranged adjacent to the clamping assembly near the cutting blade. The heating device includes several heating irons arranged circumferentially along the sleeve. The heating irons are fan-shaped and can move synchronously along the radial direction of the sleeve. The inner and outer walls of the heating irons are located on the same circumferential surface. The heating irons are arranged around the outside of the pipe. By converting electrical energy into heat energy, the heating irons preheat the cut surface of the pipe. The preheating effect is good, and preheating softens the cut surface of the plastic pipe and reduces the resistance during cutting. This helps to reduce the pressure and breakage generated during cutting, and can greatly reduce the probability of pipe cracking and burr formation during cutting.

[0009] In the aforementioned automatic pipe cutting machine for improving cutting quality, a movable frame is slidably mounted on the sleeve. The sliding assembly includes a slider fixed to the sleeve and a first slide rail slidably connected to the slider. The first slide rail is arranged radially along the sleeve. The movable frame has horizontally arranged limiting holes on both the upper and lower sides of each first slide rail. Each first slide rail has vertically inserted limiting posts on both the upper and lower sides of the limiting holes. The two limiting holes on the same side of the two first slide rails are arranged in a figure-eight shape and symmetrically distributed about the central axis of the sleeve. This makes the radial feed of the sliding assembly, carrying the cutting blade and the first roller, along the sleeve more precise.

[0010] In the aforementioned automatic pipe cutting machine for improving cutting quality, the drive assembly includes a first motor mounted on a fixed frame and a drive sprocket fixed to the output shaft of the first motor. The fixed frame also rotatably connects to several driven sprockets arranged circumferentially around the sleeve. The drive sprocket and the driven sprockets are connected by a chain. Lead screws are threaded onto and connected to the driven sprockets. The lead screws are arranged axially along the sleeve, and several lead screws are simultaneously fixed to the moving frame. The chain drive and lead screws drive the moving frame to move axially along the sleeve, and the moving frame synchronously drives the sliding assembly to feed the cutting blade and the first roller radially along the sleeve, ensuring a uniform and smooth feed, further reducing the probability of chipping and burrs during pipe cutting.

[0011] In the aforementioned automatic pipe cutting machine for improving cutting quality, a second motor is also installed on the fixed frame. The output shaft of the second motor is horizontally positioned and connected to a drive pulley. A driven pulley is connected to the sleeve. The drive pulley and the driven pulley are arranged vertically opposite each other and connected by a first belt. The diameter of the drive pulley is smaller than the diameter of the driven pulley. The second motor drives the sleeve to rotate synchronously via the drive pulley, the first belt, and the driven pulley. Since the diameter of the drive pulley is smaller than that of the driven pulley, a speed reduction and torque increase effect can be achieved.

[0012] In the aforementioned automatic pipe cutting machine for improving cutting quality, a second slide rail and a first cylinder are respectively installed on the frame. Two fixed plates are slidably connected side-by-side on the second slide rail. A middle rod is hinged to the second slide rail, and support rods are hinged to both ends of the middle rod. The two support rods are respectively hinged to the two fixed plates. Each fixed plate is connected to a mounting shaft perpendicular to the second slide rail. A second roller is rotatably sleeved on the mounting shaft. The sidewalls of the second rollers are V-shaped, and the sidewalls of the two second rollers are arranged opposite to each other. The distance between the two second rollers is automatically adjusted by the first cylinder and the linkage structure of the middle rod and support rods, without manual adjustment, thereby enabling this automatic pipe cutting machine for improving cutting quality to better adapt to the cutting of pipes of different diameters.

[0013] In the aforementioned automatic pipe cutting machine for improving cutting quality, the second roller is vertically connected to one end of the frame, and a third roller for supporting the pipe is rotatably connected to the other end of the frame. A fourth and fifth roller, also for supporting the pipe, are rotatably connected to the frame at positions adjacent to the two clamping assemblies. The sidewalls of the third, fourth, and fifth rollers are all V-shaped, and they are all horizontally connected to the frame. A horizontally positioned support plate is connected to the frame next to the fifth roller. This ensures that the pipe remains horizontal during movement, preventing unilateral tilting and further reducing the probability of chipping and burrs during pipe cutting.

[0014] In the aforementioned automatic pipe cutting machine for improving cutting quality, the clamping assembly includes a second cylinder, a first clamping frame, and several second clamping frames mounted on the fixed frame. The first clamping frame and several second clamping frames are arranged circumferentially along the sleeve. The middle part of the first clamping frame and one end of the second clamping frame are respectively hinged to the fixed frame. The other end of the second clamping frame and one end of the first clamping frame can respectively swing radially along the sleeve. Adjacent second clamping frames and adjacent first and second clamping frames are connected by connecting rods. The output shaft of the second cylinder is vertically arranged and connected to the other end of the first clamping frame. The clamping assembly adopts a vortex-type connecting rod structure and uses the second cylinder as power, allowing the clamping assembly to automatically adjust the clamping according to the pipe size without manual adjustment. This enables the automatic pipe cutting machine for improving cutting quality to better adapt to the cutting of pipes of different diameters.

[0015] In the aforementioned automatic pipe cutting machine for improving cutting quality, both the first and second clamping frames include two clamping plates and several connecting shafts connecting the two clamping plates. Connecting rods are respectively connected between the connecting shafts of two adjacent second clamping frames or adjacent first and second clamping frames. The output shaft of the second cylinder is connected to the connecting shaft of the first clamping frame. The inner side of the clamping plates has an arc surface. This allows the clamping frames to better contact and clamp the pipe surface.

[0016] In the aforementioned automatic pipe cutting machine for improving cutting quality, the frame is further equipped with a third motor, a third slide rail arranged axially along the sleeve, and a rotatable driven wheel. A driving wheel is connected to the output shaft of the third motor. The driving wheel and the driven wheel are connected by a second belt, which is arranged axially along the sleeve and connected to a fixed frame. The fixed frame is slidably connected to the third slide rail. This allows the fixed frame to move back and forth along the third slide rail driven by the third motor.

[0017] Compared with existing technologies, the advantages of this automatic pipe cutting machine for improving cutting quality are as follows: the entire cutting process is fully automatic, requiring no manual operation, with a fast cutting speed, and the heating device can preheat the pipe before cutting, greatly reducing the probability of pipe cracking and burrs during cutting. The first roller can support the pipe during cutting, preventing the cutting blade from excessively squeezing the pipe end and causing deformation, resulting in good cutting quality. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an automatic pipe cutter designed to improve cutting quality.

[0019] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0020] Figure 3 This is a three-dimensional structural diagram of an automatic pipe cutter after removing part of its frame, designed to improve cutting quality.

[0021] Figure 4 yes Figure 3 A magnified view of a section at point B.

[0022] Figure 5 This is a three-dimensional structural diagram of the cutting device, clamping assembly, and heating device of an automatic pipe cutter used to improve cutting quality.

[0023] Figure 6 This is a three-dimensional structural diagram of an automatic pipe cutting machine cutting device designed to improve cutting quality.

[0024] Figure 7 This is a three-dimensional structural diagram of the clamping assembly of an automatic pipe cutter, designed to improve cutting quality, mounted on a fixed frame.

[0025] Figure 8 This is a three-dimensional structural diagram of the clamping assembly of an automatic pipe cutter used to improve cutting quality.

[0026] Figure 9 This is a three-dimensional structural diagram of the clamping frame of the clamping assembly of an automatic pipe cutter used to improve cutting quality.

[0027] In the diagram, 1 is the frame; 2 is the cutting device; 2a is the fixed frame; 2b is the sleeve; 2c is the drive assembly; 2c1 is the first motor; 2c2 is the driving sprocket; 2c3 is the driven sprocket; 2c4 is the chain; 2c5 is the lead screw; 2d is the sliding assembly; 2d1 is the slider; 2d2 is the first slide rail; 2d3 is the limiting post; 2e is the blade holder; 2f is the roller frame; 2g is the cutting blade; 2h is the first roller; 2I is the moving frame; 2I 1. Limiting hole; 3. Clamping assembly; 3a. Second cylinder; 3b. First clamping frame; 3c. Connecting rod; 3d. Second clamping frame; 3e. Clamping plate; 3e1. Arc surface; 3f. Connecting shaft; 4. Heating device; 4a. Electric heating iron; 5. Second motor; 6. Drive pulley; 7. Driven pulley; 8. First belt; 9. Second slide rail; 10. First cylinder; 11. Fixing plate; 12. Intermediate rod; 13. Support rod; 14. Mounting shaft; 15. Second roller; 16. Third roller; 17. Fourth roller; 18. Fifth roller; 19. Material support plate; 20. Third motor; 21. Third slide rail; 22. Driven wheel; 23. Drive wheel; 24. Second belt. Detailed Implementation

[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] An automatic pipe cutting machine for improving cutting quality, as described in the reference. Figure 1-9The device includes a frame 1 and a cutting device 2 mounted on the frame 1. The cutting device 2 includes a fixed frame 2a slidably connected to the frame 1 and a sleeve 2b rotatably connected to the fixed frame 2a. A drive assembly 2c and two clamping assemblies 3 located at opposite ends of the sleeve 2b are mounted on the fixed frame 2a for clamping the pipe. A heating device 4 for preheating the pipe is also provided on the fixed frame 2a. At least two sliding assemblies 2d are circumferentially positioned on the sleeve 2b. A cutting blade 2g and a first roller 2h are respectively mounted on the two sliding assemblies 2d and arranged radially opposite to each other along the sleeve 2b. Driven by the drive assembly 2c, the two sliding assemblies 2d can slide synchronously along the radial direction of the sleeve 2b, causing the cutting blade 2g and the first roller 2h to move closer or further apart. The cutting blade 2g is connected to the sliding assembly 2d via a blade holder 2e, and the first roller 2h is connected to another sliding assembly 2d via a roller holder 2f. There are two first rollers 2h located on the same arc.

[0030] Reference Figure 1 , Figure 2 and Figure 5 Furthermore, the heating device 4 is arranged adjacent to the clamping assembly 3 near the cutting blade 2g. The heating device 4 includes a plurality of heating irons 4a arranged circumferentially along the sleeve 2b. The heating irons 4a are fan-shaped and can move synchronously along the radial direction of the sleeve 2b. The inner and outer sidewalls of the plurality of heating irons 4a are respectively located on the same circumferential surface. The fixing frame 2a is equipped with a plurality of cylinders that correspond one-to-one with the heating irons 4a. The heating irons 4a are driven by the corresponding cylinders to move radially along the sleeve 2b.

[0031] Reference Figure 1 , Figure 5 and Figure 6 Specifically, a movable frame 2I is slidably mounted on the sleeve 2b. The sliding component 2d includes a slider 2d1 fixed to the sleeve 2b and a first slide rail 2d2 slidably connected to the slider 2d1. The first slide rail 2d2 is arranged radially along the sleeve 2b. The movable frame 2I has horizontally arranged limiting holes 2I 1 at the upper and lower sides of each first slide rail 2d2. Each first slide rail 2d2 has a vertically inserted limiting post 2d3 on the upper and lower sides of the limiting hole 2I 1. The two limiting holes 2I 1 located on the same side of the two first slide rails 2d2 are in the shape of an "eight" and are symmetrically distributed about the central axis of the sleeve 2b.

[0032] Reference Figure 1 , Figure 5 and Figure 6Specifically, the drive assembly 2c includes a first motor 2c1 mounted on a fixed frame 2a and a drive sprocket 2c2 fixed to the output shaft of the first motor 2c1. A plurality of driven sprockets 2c3 rotatably connected to the fixed frame 2a are arranged circumferentially along the sleeve 2b. The drive sprocket 2c2 and the plurality of driven sprockets 2c3 are connected by a chain 2c4. Lead screws 2c5 are threaded through and threaded onto the driven sprockets 2c3. The lead screws 2c5 are arranged axially along the sleeve 2b, and the plurality of lead screws 2c5 are simultaneously fixed to the moving frame 2I. In this embodiment, preferably, the two limiting holes 2I 1 located on the same side of the two first slide rails 2d2 are arranged in a figure-eight shape. When the moving frame 2I moves along the axial direction of the sleeve 2b, the edge of the limiting hole 2I 1 can drive the limiting post 2d3 to move synchronously, and the limiting post 2d3 can drive the first slide rail 2d2 to move synchronously, thereby converting the axial movement of the moving frame 2I along the sleeve 2b into the radial movement of the cutting blade 2g and the first roller 2h along the sleeve 2b.

[0033] Reference Figure 1 , Figure 5 and Figure 6 More specifically, a second motor 5 is also installed on the fixed frame 2a. The output shaft of the second motor 5 is horizontally arranged and connected to a drive pulley 6. A driven pulley 7 is connected to the sleeve 2b. The drive pulley 6 and the driven pulley 7 are arranged vertically opposite each other and connected by a first belt 8. The diameter of the drive pulley 6 is smaller than the diameter of the driven pulley 7.

[0034] Reference Figure 1 , Figure 3 and Figure 4 Specifically, a second slide rail 9 and a first cylinder 10 are respectively installed on the frame 1. Two fixed plates 11 are slidably connected side by side on the second slide rail 9. A middle rod 12 is hinged to the second slide rail 9. Support rods 13 are respectively hinged to both ends of the middle rod 12. The two support rods 13 are respectively hinged to the two fixed plates 11. Each fixed plate 11 is connected to a mounting shaft 14 perpendicular to the second slide rail 9. A second roller 15 is rotatably sleeved on the mounting shaft 14. The side wall of the second roller 15 is V-shaped, and the side walls of the two second rollers 15 are arranged opposite to each other.

[0035] Reference Figure 1 , Figure 3 and Figure 5Furthermore, the second roller 15 is vertically connected to one end of the frame 1, and the other end of the frame 1 is rotatably connected to a third roller 16 for supporting the material. The frame 1 is also rotatably connected to a fourth roller 17 and a fifth roller 18, both for supporting the material, at positions adjacent to the two clamping components 3. The sidewalls of the third roller 16, the fourth roller 17, and the fifth roller 18 are all V-shaped, and the third roller 16, the fourth roller 17, and the fifth roller 18 are all horizontally connected to the frame 1. The frame 1 is connected to a horizontally arranged material support plate 19 next to the fifth roller 18.

[0036] Reference Figure 1 , Figure 5 , Figure 7 and Figure 8 Specifically, the clamping assembly 3 includes a second cylinder 3a, a first clamping frame 3b, and a plurality of second clamping frames 3d mounted on the fixed frame 2a. The first clamping frame 3b and the plurality of second clamping frames 3d are arranged together along the circumference of the sleeve 2b. The middle part of the first clamping frame 3b and one end of the second clamping frame 3d are respectively hinged to the fixed frame 2a. The other end of the second clamping frame 3d and one end of the first clamping frame 3b can swing radially along the sleeve 2b. Adjacent second clamping frames 3d and adjacent first clamping frames 3b and second clamping frames 3d are connected by a connecting rod 3c. The output shaft of the second cylinder 3a is vertically arranged and connected to the other end of the first clamping frame 3b.

[0037] Reference Figure 1 , Figure 5 , Figure 7 , Figure 8 and Figure 9 More specifically, the first clamping frame 3b and the second clamping frame 3d each include two clamping plates 3e and a plurality of connecting shafts 3f connecting the two clamping plates 3e. The connecting rod 3c is connected between two adjacent second clamping frames 3d or between the connecting shafts 3f of the adjacent first clamping frames 3b and second clamping frames 3d. The output shaft of the second cylinder 3a is connected to the connecting shaft 3f of the first clamping frame 3b. The inner side of the clamping plate 3e has an arc surface 3e1.

[0038] Reference Figure 1 and Figure 3More specifically, the frame 1 is also equipped with a third motor 20, a third slide rail 21 arranged along the axial direction of the sleeve 2b, and a rotatable driven wheel 22. The output shaft of the third motor 20 is connected to a driving wheel 23. The driving wheel 23 and the driven wheel 22 are connected by a second belt 24. The second belt 24 is arranged along the axial direction of the sleeve 2b and is connected to the fixed frame 2a. The fixed frame 2a is slidably connected to the third slide rail 21.

[0039] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An automatic pipe cutting machine for improving cutting quality, comprising a frame (1) and a cutting device (2) disposed on the frame (1), characterized in that, The cutting device (2) includes a fixed frame (2a) slidably connected to the frame (1) and a sleeve (2b) rotatably connected to the fixed frame (2a). The fixed frame (2a) is equipped with a drive assembly (2c) and two clamping assemblies (3) located at both ends of the sleeve (2b) for clamping the pipe. The fixed frame (2a) is also equipped with a heating device (4) for preheating the pipe. The sleeve (2b) is circumferentially positioned with at least two sliding assemblies (2d). The two sliding assemblies (2d) are respectively equipped with a cutting blade (2g) and a first roller (2h) arranged radially opposite to each other along the sleeve (2b). Under the drive of the drive assembly (2c), the two sliding assemblies (2d) can slide synchronously along the radial direction of the sleeve (2b) so that the cutting blade (2g) and the first roller (2h) move closer or further away from each other.

2. An automatic pipe cutting machine for improving cutting quality according to claim 1, characterized in that, The heating device (4) is arranged adjacent to the clamping assembly (3) near the cutting blade (2g). The heating device (4) includes a plurality of heating irons (4a) arranged circumferentially along the sleeve (2b). The heating irons (4a) are fan-shaped and can move synchronously along the radial direction of the sleeve (2b). The inner and outer sidewalls of the plurality of heating irons (4a) are located on the same circumferential surface.

3. An automatic pipe cutting machine for improving cutting quality according to claim 1, characterized in that, A movable frame (2I) is slidably mounted on the sleeve (2b). The sliding assembly (2d) includes a slider (2d1) fixed to the sleeve (2b) and a first slide rail (2d2) slidably connected to the slider (2d1). The first slide rail (2d2) is arranged radially along the sleeve (2b). The movable frame (2I) has horizontally arranged limiting holes (2I 1) on the upper and lower sides of each first slide rail (2d2). Each first slide rail (2d2) has vertically inserted limiting posts (2d3) on the upper and lower sides of the limiting holes (2I 1). The two limiting holes (2I 1) on the same side of the two first slide rails (2d2) are in the shape of an "eight" and are symmetrically distributed about the central axis of the sleeve (2b).

4. An automatic pipe cutting machine for improving cutting quality according to claim 3, characterized in that, The drive assembly (2c) includes a first motor (2c1) mounted on a fixed frame (2a) and a drive sprocket (2c2) fixedly connected to the output shaft of the first motor (2c1). A plurality of driven sprockets (2c3) arranged circumferentially along the sleeve (2b) are also rotatably connected to the fixed frame (2a). The drive sprocket (2c2) and the plurality of driven sprockets (2c3) are connected by a chain (2c4). A lead screw (2c5) is threaded through and threaded onto the driven sprocket (2c3). The lead screw (2c5) is arranged axially along the sleeve (2b), and the plurality of lead screws (2c5) are simultaneously fixedly connected to the moving frame (2I).

5. An automatic pipe cutting machine for improving cutting quality according to claim 3, characterized in that, A second motor (5) is also installed on the fixed frame (2a). The output shaft of the second motor (5) is horizontally arranged and connected to a drive pulley (6). A driven pulley (7) is connected to the sleeve (2b). The drive pulley (6) and the driven pulley (7) are arranged vertically opposite each other and connected by a first belt (8). The diameter of the drive pulley (6) is smaller than the diameter of the driven pulley (7).

6. An automatic pipe cutting machine for improving cutting quality according to claim 1, characterized in that, The frame (1) is respectively equipped with a second slide rail (9) and a first cylinder (10). Two fixed plates (11) are slidably connected side by side on the second slide rail (9). A middle rod (12) is hinged on the second slide rail (9). Support rods (13) are respectively hinged to both ends of the middle rod (12). The two support rods (13) are respectively hinged to the two fixed plates (11). Each fixed plate (11) is connected to a mounting shaft (14) perpendicular to the second slide rail (9). A second roller (15) is rotatably sleeved on the mounting shaft (14). The side wall of the second roller (15) is V-shaped, and the side walls of the two second rollers (15) are arranged opposite to each other.

7. An automatic pipe cutting machine for improving cutting quality according to claim 6, characterized in that, The second roller (15) is vertically connected to one end of the frame (1), and the other end of the frame (1) is rotatably connected to a third roller (16) for supporting the material. The frame (1) is also rotatably connected to a fourth roller (17) and a fifth roller (18) for supporting the material at positions adjacent to the two clamping components (3). The side walls of the third roller (16), the fourth roller (17) and the fifth roller (18) are all V-shaped, and the third roller (16), the fourth roller (17) and the fifth roller (18) are all horizontally connected to the frame (1). The frame (1) is connected to a horizontally arranged material support plate (19) on the side of the fifth roller (18).

8. An automatic pipe cutting machine for improving cutting quality according to any one of claims 1-7, characterized in that, The clamping assembly (3) includes a second cylinder (3a), a first clamping frame (3b), and a plurality of second clamping frames (3d) mounted on the fixed frame (2a). The first clamping frame (3b) and the plurality of second clamping frames (3d) are arranged together along the circumference of the sleeve (2b). The middle part of the first clamping frame (3b) and one end of the second clamping frame (3d) are respectively hinged to the fixed frame (2a). The other end of the second clamping frame (3d) and one end of the first clamping frame (3b) can swing radially along the sleeve (2b). Two adjacent second clamping frames (3d) and adjacent first clamping frames (3b) and second clamping frames (3d) are connected by a connecting rod (3c). The output shaft of the second cylinder (3a) is arranged vertically and connected to the other end of the first clamping frame (3b).

9. An automatic pipe cutting machine for improving cutting quality according to claim 8, characterized in that, The first clamping frame (3b) and the second clamping frame (3d) each include two clamping plates (3e) and a plurality of connecting shafts (3f) connecting the two clamping plates (3e). The connecting rod (3c) is connected between the connecting shafts (3f) of two adjacent second clamping frames (3d) or adjacent first clamping frames (3b) and second clamping frames (3d). The output shaft of the second cylinder (3a) is connected to the connecting shaft (3f) of the first clamping frame (3b). The inner side of the clamping plate (3e) has an arc surface (3e1).

10. An automatic pipe cutting machine for improving cutting quality according to any one of claims 1-7, characterized in that, The frame (1) is also provided with a third motor (20), a third slide rail (21) arranged along the axial direction of the sleeve (2b) and a rotatable driven wheel (22). The output shaft of the third motor (20) is connected to a driving wheel (23). The driving wheel (23) and the driven wheel (22) are connected by a second belt (24). The second belt (24) is arranged along the axial direction of the sleeve (2b) and connected to the fixed frame (2a). The fixed frame (2a) is slidably connected to the third slide rail (21).

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