Plastic pipe cutting equipment with pipeline anti-deviation structure

Abstract

The invention relates to the technical field of pipe fitting machining, in particular to plastic pipe cutting equipment with a pipeline anti-deviation structure, the plastic pipe cutting equipment comprises a cutting bottom frame and movable frames, the movable frames are rotationally arranged on the two sides of the top of the cutting bottom frame, and conveying positioning units are arranged in the two movable frames and on the two sides of the interior of the cutting bottom frame; a mounting frame is further fixedly arranged in the cutting bottom frame and located between the two movable frames, and a planetary cutting unit is further arranged in the mounting frame. By adopting a step-by-step process of pre-cutting and main cutting, a cutting servo electric cylinder drives a pre-cutting blade to form a concave positioning reference on the surface of a pipe to release local stress in advance, then full-depth cutting is completed through a main cutting blade, and stable rotation of a planet carrier in a rotating groove is matched, so that deformation of the pipe is remarkably reduced; the flatness of a cutting surface is improved; the edge grinding wheel in the negative pressure groove can grind the end face after cutting, and the quality of a finished product is further optimized.

Description

Technical Field

[0001] This invention relates to the field of pipe processing technology, specifically to a plastic pipe cutting device with a pipe anti-deviation structure. Background Technology

[0002] With the improvement of people's living standards, environmental awareness and attention to health, plastic pipes and fittings have gradually replaced traditional metal pipes and become an important material for pipeline engineering in the water supply and drainage field due to their characteristics such as light weight, corrosion resistance, high pressure resistance, energy saving, long service life and convenient installation. When processing plastic pipe fittings, long pipes need to be cut into small sections to facilitate transportation and installation during use.

[0003] Traditional equipment often uses a single clamping structure, which is difficult to adapt to plastic pipes of different diameters. During cutting, the pipe is prone to axial or radial displacement due to uneven force or vibration, resulting in tilted cut surfaces, excessive burrs, and difficulty in controlling precision. For plastic pipes of different diameters, positioning components need to be frequently replaced, making the adjustment process cumbersome and lacking versatility, especially for large-diameter or irregularly shaped plastic pipes. When performing full-depth cutting directly, the plastic pipe is prone to deformation or cracking due to instantaneous stress concentration, especially for PVC pipes with high hardness or PE pipes with high toughness, making it difficult to guarantee the flatness of the cut surface. Furthermore, the lack of a pre-positioning reference further aggravates cutting errors.

[0004] To address this, we propose a plastic pipe cutting device with a pipe anti-deviation structure. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a plastic pipe cutting device with a pipe anti-deviation structure, which solves the aforementioned technical defects.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a plastic pipe cutting device with a pipe anti-deviation structure, comprising a cutting base frame and a movable frame, wherein movable frames are rotatably arranged on both sides of the top of the cutting base frame, and conveying and positioning units are arranged inside the two movable frames and on both sides inside the cutting base frame; a mounting frame is also fixedly arranged inside the cutting base frame and between the two movable frames, and a planetary cutting unit is also arranged inside the mounting frame. The conveying and positioning unit includes an arc-shaped fixed frame and a conveyor belt. Arc-shaped fixed frames are fixedly installed on both sides of the cutting base and inside the two movable frames. Arc-shaped grooves are provided inside the arc-shaped fixed frames, and three conveyor frames are arranged at equal angles inside the arc-shaped grooves. The conveyor belts are rotated inside the three conveyor frames by built-in motors. Three sets of conveying servo cylinders are arranged at equal angles inside the arc-shaped fixed frames, and one end of the output shaft of each of the three sets of conveying servo cylinders is fixedly connected to one side of the three conveyor frames.

[0007] Preferably, the cutting base frame is fixedly provided on both sides of the top front, and telescopic protrusions are movably provided on both sides of the two limit frames. The front side of the bottom of the two movable frames is provided with a limit groove that cooperates with the limit frame, and the two sides inside the limit groove are also provided with a limit groove that cooperates with the telescopic protrusion.

[0008] Preferably, the planetary cutting unit includes a planetary carrier, the mounting frame has a rotating groove inside, and the planetary carrier is rotatably mounted inside the rotating groove. An external gear ring is fixedly mounted on the surface of the planetary carrier. A drive motor is fixedly mounted inside the mounting frame, and a drive gear is fixedly mounted on one end of the output shaft of the drive motor. The tooth surface of the drive gear meshes with the tooth surface of the external gear ring for transmission.

[0009] Preferably, the planetary carrier has four movably arranged internally, and a negative pressure groove is provided on one side of each of the four limiting blocks. Grinding wheels are movably arranged on both sides of the negative pressure groove via miniature electric cylinders, and the grinding wheels are driven by a built-in motor.

[0010] Preferably, limit servo cylinders are fixedly installed around the four sides of the planetary carrier, and one end of the drive shaft of each of the four limit servo cylinders is fixedly connected to one side of the four limit blocks.

[0011] Preferably, each of the four limiting blocks has a number of ball bearings rotatably arranged on one side, and the four limiting servo electric cylinders are arranged at equal angles about the central axis of the planetary carrier.

[0012] Preferably, the planetary carrier has a material extraction groove inside, and the interiors of the four limiting blocks are all connected to the interior of the material extraction groove through negative pressure pipes; the interior of the negative pressure groove is connected to the interior of the negative pressure pipes, and an annular material extraction frame is rotatably provided on the outer circumference of the planetary carrier, and the interior of the annular material extraction frame is connected to the interior of the material extraction groove.

[0013] Preferably, one side of the annular material extraction rack is fixedly connected to the interior of the mounting frame, and one side of the annular material extraction rack is provided with a material extraction pipe, one end of which extends to the front of the mounting frame.

[0014] Preferably, two cutting servo cylinders are symmetrically fixed inside the planetary carrier, and a cutting mounting seat is fixedly installed at one end of the drive shaft of each of the two cutting servo cylinders. The main cutting blade and the pre-cutting blade are respectively installed inside the two cutting mounting seats by a built-in motor.

[0015] Preferably, a plurality of anti-deviation servo cylinders are fixedly installed on both sides inside the mounting bracket, and an anti-deviation clamping block is fixedly installed at one end of the drive shaft of each of the plurality of anti-deviation servo cylinders.

[0016] Compared with existing technologies, it has the following advantages: 1. In the conveying and positioning unit inside the cutting base frame and movable frame of the present invention, the three sets of conveying servo electric cylinders in the arc-shaped fixed frame can drive the conveying frame to adjust the spacing synchronously. Together with the limit block controlled by the limit servo electric cylinder and the anti-deviation clamping block driven by the anti-deviation servo electric cylinder in the planetary cutting unit, it can adapt to plastic pipes of different diameters without the need to replace special fixtures, reduce equipment adaptation costs, and enhance production versatility.

[0017] 2. This invention forms a triple anti-deviation system of conveying positioning, overall clamping, and cutting area fitting: the three conveyor belts of the conveying positioning unit are conveyed in multiple directions with the pipe through rubber pads to avoid deviation during the conveying stage; the anti-deviation clamps on both sides of the mounting frame clamp and limit the overall pipe; the four limiting blocks in the planetary frame are precisely fitted to the outer circumference of the cutting area, and the ball bearings reduce frictional resistance while achieving dynamic limiting, effectively suppressing the pipe deviation caused by cutting stress and ensuring the stability of the cutting reference.

[0018] 3. This invention adopts a step-by-step process of pre-cutting and main cutting. The cutting servo electric cylinder drives the pre-cutting blade to form a recessed positioning reference on the surface of the pipe in advance to release local stress. Then, the main cutting blade completes the full-depth cutting. With the stable rotation of the planetary carrier in the rotating groove, the pipe deformation is significantly reduced and the flatness of the cut surface is improved. The grinding wheel in the negative pressure groove can grind the end face after cutting to further optimize the quality of the finished product.

[0019] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a plastic pipe cutting device with a pipe anti-deviation structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the cutting base frame and mounting frame structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the cutting base frame and arc-shaped fixing frame structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the mounting bracket and dust collection tank structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of the mounting bracket according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the internal structure of the mounting frame and planetary carrier according to an embodiment of the present invention; Figure 7 This is a side view of the mounting frame and planetary carrier structure according to an embodiment of the present invention.

[0021] In the diagram, 1. Cutting base frame; 2. Movable frame; 3. Mounting frame; 4. Conveying and positioning unit; 5. Planetary cutting unit; 6. Arc-shaped fixed frame; 7. Conveying frame; 8. Conveying belt; 9. Conveying servo cylinder; 10. Limiting frame; 11. Limiting groove; 12. Telescopic protrusion; 13. Dust suction groove; 14. Dust suction pipe; 15. Anti-deviation clamping block; 16. Anti-deviation servo cylinder; 17. Rotating groove; 18. Planetary carrier; 19. External gear ring; 20. Drive gear; 21. Drive motor; 22. Limiting block; 23. Negative pressure groove; 24. Grinding wheel; 25. Limiting servo cylinder; 26. Cutting mounting base; 27. Cutting servo cylinder; 28. Main cutting blade; 29. ​​Pre-cutting blade; 30. Negative pressure pipe; 31. Material extraction groove; 32. Annular material extraction frame. Detailed Implementation

[0022] 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.

[0023] This invention is mainly used to solve the technical problems in existing plastic pipe cutting equipment, such as poor pipe diameter adaptability, easy pipe deviation during the cutting process, insufficient operation and maintenance convenience, poor cutting accuracy and finished product quality, and difficulty in collecting cutting dust and debris synchronously and efficiently. Specifically, it achieves targeted solutions through the synergistic effect of various structural components. Example 1

[0024] Please see Figures 1 to 7 As shown, a plastic pipe cutting device with a pipe anti-deviation structure includes: a cutting base frame 1 and movable frames 2. Movable frames 2 are rotatably mounted on both sides of the top of the cutting base frame 1, and conveying and positioning units 4 are provided inside the two movable frames 2 and on both sides of the inside of the cutting base frame 1. The lower back of the two movable frames 2 and the two sides of the back of the cutting base frame 1 are hinged together, and the lower back of the two movable frames 2 can be rotated from 0 to 80 degrees around the upper back of the cutting base frame 1. A mounting frame 3 is fixedly mounted inside the cutting base frame 1 and located between the two movable frames 2, and a planetary cutting unit 5 is provided inside the mounting frame 3. The conveying and positioning units 4 on the upper and lower sides of the inside of the cutting base frame 1 automatically convey the plastic pipe through the inside of the mounting frame 3. The planetary cutting unit 5 inside the mounting frame 3 performs anti-deviation limiting and cutting processing on the plastic pipe, and simultaneously treats the dust generated during the cutting process to ensure the surface accuracy of the plastic pipe during the cutting process.

[0025] Furthermore, the conveying and positioning unit 4 includes an arc-shaped fixed frame 6 and a conveyor belt 8. Arc-shaped fixed frames 6 are fixedly installed on both sides of the cutting base frame 1 and inside the two movable frames 2. Arc-shaped fixed frames 6 have arc-shaped grooves inside, and three conveyor frames 7 are arranged at equal angles inside the arc-shaped grooves. The conveyor belt 8 is rotated inside each of the three conveyor frames 7 by a built-in motor. Three sets of conveying servo cylinders 9 are arranged at equal angles inside the arc-shaped fixed frame 6, and one end of the output shaft of each of the three sets of conveying servo cylinders 9 is fixedly connected to one side of the three conveyor frames 7. The surface of the conveyor belt 8 is also provided with a rubber pad. The contact between the rubber pad and the surface of the plastic tube prevents wear on the surface of the plastic tube during conveying. With the transmission of the conveyor belt 8, the plastic tube is continuously conveyed, thereby realizing continuous cutting of the plastic tube.

[0026] Furthermore, limit frames 10 are fixedly installed on both sides of the top front of the cutting base frame 1, and telescopic protrusions 12 are movably installed on both sides of the two limit frames 10. Limiting grooves 11 that cooperate with the limit frames 10 are provided on the front side of the bottom of the two movable frames 2, and limiting grooves that cooperate with the telescopic protrusions 12 are also provided on both sides inside the limiting grooves 11. Handles are fixedly installed on the front of the two movable frames 2. The telescopic protrusions 12 on both sides of the limit frames 10 are respectively connected with the limiting grooves on both sides of the inner wall of the limiting grooves 11 to ensure the connection stability between the movable frames 2 and the cutting base frame 1. Thus, the conveying and positioning unit 4 inside the movable frame 2 and the conveying and positioning unit 4 on both sides inside the cutting base frame 1 can be used to achieve stable conveying operation of the plastic tube.

[0027] It should be noted that in this embodiment, the equipment is based on the cutting base frame 1, and the movable frame 2, which is hinged on both sides of its top, can be rotated from 0 to 80 degrees. Combined with the handle on the front of the movable frame 2, operators can easily place plastic tubes of different specifications into the equipment, significantly reducing the difficulty of loading. At the same time, the rotating structure facilitates the later inspection and maintenance of the conveying positioning unit 4 or the planetary cutting unit 5, improving the overall ease of use of the equipment. The conveying positioning unit 4, installed inside the cutting base frame 1 and the movable frame 2, uses the arc-shaped fixed frame 6 as the mounting carrier. Three conveying frames 7, evenly distributed inside, are driven by three sets of conveying servo cylinders 9 to adjust their spacing, flexibly adapting to plastic tubes of different diameters. This solves the problem of poor tube diameter adaptability in traditional cutting equipment. Furthermore, when the rubber pad on the surface of the conveyor belt 8 inside the conveyor frame 7 contacts the plastic tube, it not only prevents wear on the tube surface during transport, protecting the product's appearance quality, but also increases friction to ensure smooth transport. Simultaneously, the continuous transmission of the conveyor belt 8 allows the plastic tube to continuously pass through the mounting frame 3, ensuring a smooth and stable transport. The planetary cutting unit 5 inside the mounting frame 3 enables continuous cutting operations, significantly improving processing efficiency. Furthermore, the limiting frames 10 on both sides of the top front of the cutting base frame 1 cooperate with the limiting grooves 11 on the bottom front of the movable frame 2, and the telescopic protrusions 12 on both sides of the limiting frames 10 are embedded in the limiting grooves inside the limiting grooves 11. This securely locks the relative positions of the movable frame 2 and the cutting base frame 1, preventing displacement of the movable frame 2 due to vibration during cutting. This ensures that the conveying and positioning unit 4 inside the movable frame 2 and the conveying and positioning units 4 on both sides inside the cutting base frame 1 form a coordinated conveying effect, positioning and preventing offset from multiple directions of the pipe. This provides a stable cutting reference for the planetary cutting unit 5. With the fixed support of the mounting frame 3, the planetary cutting unit 5 can achieve precise cutting by relying on the anti-offset limiting of the conveying and positioning unit 4, while simultaneously handling the dust generated during cutting, preventing dust from affecting the accuracy of the pipe cutting surface. Ultimately, this ensures that the flatness and surface quality of the cut plastic pipe end face meet processing requirements, comprehensively improving the equipment's practicality, stability, and processing quality.

[0028] Specifically, the planetary cutting unit 5 includes a planetary carrier 18, a rotating groove 17 is provided inside the mounting frame 3, and the planetary carrier 18 is rotatably mounted inside the rotating groove 17. An external gear ring 19 is fixedly mounted on the surface of the planetary carrier 18. A drive motor 21 is fixedly mounted inside the mounting frame 3, and a drive gear 20 is fixedly mounted on one end of the output shaft of the drive motor 21. The tooth surface of the drive gear 20 meshes with the tooth surface of the external gear ring 19 for transmission. The drive gear 20 is rotated by controlling the output shaft of the drive motor 21. The meshing transmission between the drive gear 20 and the external gear ring 19 causes the external gear ring 19 to drive the planetary carrier 18 to rotate inside the rotating groove 17.

[0029] Furthermore, four limiting blocks 22 are movably arranged inside the planetary carrier 18, and a negative pressure groove 23 is provided on one side of each of the four limiting blocks 22. Grinding wheels 24 are movably arranged on both sides of the negative pressure groove 23 via miniature electric cylinders, and the grinding wheels 24 are driven by a built-in motor. Limiting servo electric cylinders 25 are fixedly arranged around the inside of the planetary carrier 18, and one end of the drive shaft of each of the four limiting servo electric cylinders 25 is fixedly connected to one side of each of the four limiting blocks 22. Several ball bearings are rotatably arranged on one side of each of the four limiting blocks 22, and the four limiting servo electric cylinders 25 are equidistantly distributed about the central axis of the planetary carrier 18.

[0030] Furthermore, the planetary carrier 18 is provided with a material extraction groove 31 inside, and the interiors of the four limiting blocks 22 are all connected to the interiors of the material extraction groove 31 through negative pressure pipes 30; the interiors of the negative pressure groove 23 are connected to the interiors of the negative pressure pipes 30, and an annular material extraction frame 32 is rotatably provided on the outer circumference of the planetary carrier 18, and the interior of the annular material extraction frame 32 is connected to the interior of the material extraction groove 31; wherein, one side of the annular material extraction frame 32 is fixedly connected to the interior of the mounting frame 3, and a material extraction pipe is provided on one side of the annular material extraction frame 32, with one end of the material extraction pipe extending to the front of the mounting frame 3.

[0031] It should be noted that the limit block 22 is controlled to fit against the outer circumferential surface of the plastic tube by one end of the drive shaft of the limit servo cylinder 25. The four sets of limit blocks 22 fit against the outer circumferential surface of the plastic tube synchronously during the cutting process, further preventing the plastic tube from deviating and limiting the cutting area. When the plastic tube is being cut, the dust generated on the cutting surface is extracted by the negative pressure groove 23 in the four sets of limit blocks 22. The dust enters the interior of the extraction groove 31 through the negative pressure pipe 30, and is finally discharged through the annular extraction rack 32 and extraction pipe connected to the interior of the extraction groove 31, ensuring the environmental friendliness of the plastic tube during the cutting process.

[0032] Furthermore, two cutting servo cylinders 27 are symmetrically fixed inside the planetary carrier 18, and a cutting mounting base 26 is fixedly installed at one end of the drive shaft of each of the two cutting servo cylinders 27. The main cutting blade 28 and the pre-cutting blade 29 are respectively installed inside the two cutting mounting bases 26 by rotating through the built-in motor.

[0033] Furthermore, several anti-offset servo cylinders 16 are fixedly installed on both sides inside the mounting bracket 3, and an anti-offset clamping block 15 is fixedly installed on one end of the drive shaft of each of the several anti-offset servo cylinders 16; wherein, the several anti-offset servo cylinders 16 are distributed at equal angles about the central axis of the planetary carrier 18, and a rubber pad is provided on one side of each of the several anti-offset clamping blocks 15 to increase friction and protect the outer surface of the plastic tube.

[0034] It should be noted that when cutting the plastic pipe, the anti-offset clamping blocks 15 are first driven by several anti-offset servo cylinders 16 on both sides of the mounting bracket 3 to anti-offset clamp and limit the two sides of the plastic pipe surface. Then, the limiting blocks 22 inside the planetary carrier 18 are used to fit and limit the two sides of the plastic pipe cutting area. When cutting the plastic pipe, the cutting mounting seat 26 on the pre-cutting blade 29 is first driven by the cutting servo cylinder 27 to move closer to the surface of the plastic pipe. The planetary carrier 18 is driven to rotate, so that the pre-cutting blade 29 pre-cuts the surface of the plastic pipe. The pre-cutting blade 29 forms a concave area in the cutting area of ​​the plastic pipe. Then, the main cutting blade 28 is used to cut the plastic pipe to full depth, which can significantly reduce pipe deformation. In addition, the pre-cutting treatment by the pre-cutting blade 29 can provide a precise positioning reference for the subsequent main cutting, which greatly improves the cutting accuracy of the plastic pipe.

[0035] It should be noted that in this embodiment, the planetary carrier 18 can rotate stably in the rotating groove 17 under the meshing transmission of the drive motor 21, drive gear 20 and external gear ring 19, providing a continuous and precise power foundation for the cutting action and ensuring the consistency of the cutting trajectory. The anti-deviation servo cylinder 16 inside the mounting bracket 3 drives the anti-deviation clamping block 15 to initially clamp the two sides of the plastic tube. The rubber pad on its surface increases the friction to enhance the limiting effect and avoids wear on the tube surface. Together with the four limiting blocks 22 controlled by the limiting servo cylinder 25 inside the planetary carrier 18, the four sets of limiting blocks 22 are distributed at equal angles. The fit with the outer circumference of the tube can be precisely adjusted by the servo cylinder. The ball on one side can reduce the frictional resistance during the fit, forming a dual anti-deviation system of external clamping and cutting area fit. It achieves all-round limiting from the entire tube to the cutting area, effectively suppressing the risk of deviation during the cutting process. The cutting process employs a combination of pre-cutting and main cutting: the cutting servo cylinder 27 drives the pre-cutting blade 29 to create a recessed area on the pipe surface, releasing stress in advance and providing a positioning reference. Then, the main cutting blade 28 completes the full-depth cut, significantly reducing pipe deformation. Combined with the rotational motion of the planetary carrier 18, this results in a smoother cut surface and significantly improved precision. Simultaneously, the negative pressure groove 23 on one side of the limiting block 22 can extract the dust generated during cutting in real time. The dust enters the extraction groove 31 through the negative pressure pipe 30 and is finally discharged through the annular extraction frame 32 and extraction pipe connected to the extraction groove 31, preventing dust from adhering and affecting cutting precision or polluting the environment, thus ensuring environmentally friendly processing. In addition, the grinding wheel 24 in the negative pressure groove 23 can grind the end face of the pipe after cutting, further improving processing quality. In the overall structure, the precise drive of each servo cylinder can adapt to plastic pipes of different diameters, enhancing the equipment's versatility, while the coordinated operation of each component comprehensively improves cutting efficiency and finished product quality. Example 2

[0036] Specifically, this embodiment also discloses a working method for a plastic pipe cutting device with a pipe anti-deviation structure, including the following steps: Step 1: The operator holds the handle on the front of the movable frame 2 and rotates the two movable frames 2 outward by 80 degrees around the hinge on the back of the cutting base frame 1. The plastic tube to be cut is placed between the conveying and positioning unit 4 inside the cutting base frame 1 and the movable frame 2. Then the movable frame 2 is reset so that the limiting groove 11 on the front side of the bottom of the movable frame 2 is aligned with the limiting frames 10 on both sides of the top front of the cutting base frame 1 until the telescopic protrusions 12 on both sides of the limiting frame 10 are embedded into the limiting groove inside the limiting groove 11. This completes the locking of the movable frame 2 and the cutting base frame 1, preventing the movable frame 2 from shifting during subsequent conveying and cutting. Step 2: Conveying and Positioning Adjustment. Based on the diameter of the plastic tube to be cut, activate the three sets of conveying servo cylinders 9 inside the arc-shaped fixing frame 6 in the conveying and positioning unit 4. Drive the three sets of conveying frames 7 to move synchronously within the arc-shaped groove of the arc-shaped fixing frame 6 until the rubber pads on the surface of the conveyor belt 8 inside the three conveyor frames 7 are in close contact with the outer circumference of the plastic tube. Then, activate the built-in motor of the conveyor belt 8. Through the continuous transmission of the conveyor belt 8, drive the plastic tube to move horizontally towards the planetary cutting unit 5 inside the mounting frame 3, realizing the continuous feeding of the plastic tube. Step 3: Pre-cutting anti-deviation limiting. When the front end of the plastic tube moves to the cutting area of ​​the planetary cutting unit 5, several anti-deviation servo cylinders 16 on both sides of the mounting frame 3 are activated first to drive the anti-deviation clamping blocks 15 to approach and clamp the plastic tube on both sides, thus initially limiting the plastic tube as a whole. Then, four limiting servo cylinders 25 on the four sides of the planetary frame 18 are activated to push the four limiting blocks 22 to fit against the outer circumference of the plastic tube cutting area. The ball bearings on one side of the limiting block 22 reduce the frictional resistance with the tube during the fitting process, forming a dual anti-deviation system of overall limiting of the anti-deviation clamping blocks 15 and fitting limiting of the limiting blocks 22 in the cutting area, ensuring that the tube does not deviate during the cutting process. Step 4: Start the drive motor 21 inside the mounting bracket 3. Its output shaft drives the drive gear 20 to rotate. Through the meshing transmission between the drive gear 20 and the external gear ring 19 on the surface of the planetary carrier 18, the planetary carrier 18 rotates at a constant speed in the rotating groove 17. At the same time, start one of the cutting servo cylinders 27 inside the planetary carrier 18 to drive the pre-cutting blade 29 on the corresponding cutting mounting seat 26 to approach the surface of the plastic tube. As the planetary carrier 18 rotates, the pre-cutting blade 29 forms an annular depression in the cutting area of ​​the plastic tube, releasing the internal stress of the tube in advance and providing a precise positioning reference for the subsequent main cutting. After the pre-cutting is completed, keep the planetary carrier 18 rotating at a constant speed and start the other cutting servo cylinder 27 to drive the main cutting blade 28 to approach the annular depression of the plastic tube and perform full-depth cutting along the depression trajectory. Because the pre-cutting has weakened the cutting resistance of the tube and provided positioning, the deformation of the tube during the main cutting process is significantly reduced and the flatness of the cut surface is improved. Step 5: Simultaneous Dust and Scrap Treatment During the pre-cutting and main cutting processes, the negative pressure dust extraction system is activated simultaneously. The dust and scrap generated during cutting are sucked in by the negative pressure generated by the negative pressure groove 23 on one side of the limiting block 22, and enter the material extraction groove 31 inside the planetary carrier 18 through the negative pressure pipe 30 inside the limiting block 22. Then, they are discharged to the external dust collection equipment through the annular material extraction frame 32 and material extraction pipe connected to the material extraction groove 31, so as to avoid dust and scrap adhering to the cutting surface, affecting the accuracy or polluting the environment. Step Six: Post-Cutting Processing and Equipment Reset. After the main cutting is completed, the micro electric cylinder inside the negative pressure tank 23 is activated to adjust the position of the grinding wheel 24 so that it contacts the cut end face of the plastic tube. Driven by the built-in motor of the grinding wheel 24, the end face is ground to further improve the quality of the finished product. Then, the drive motor 21 and each servo electric cylinder are turned off, and the anti-deviation clamping block 15, limit block 22, main cutting blade 28, pre-cutting blade 29, and grinding wheel 24 are reset. The conveyor belt 8 continues to drive, transporting the cut plastic tube to the outside of the equipment. Finally, the power of the equipment is turned off. If cutting is required to continue, steps one to seven are repeated. If the equipment is to be stopped, the movable frame 2 can be flipped over to clean and maintain the conveying positioning unit 4 and the planetary cutting unit 5.

[0037] In summary, the structural design addresses the issue of poor pipe diameter adaptability. Three sets of conveying servo cylinders 9 within the arc-shaped fixed frame 6 of the internal conveying and positioning unit 4 of the cutting base frame 1 and the movable frame 2 drive three conveying frames 7 to flexibly adjust their spacing. This, combined with the anti-deviation clamping block 15 driven by the anti-deviation servo cylinder 16 and the limiting block 22 driven by the limiting servo cylinder 25 in the planetary cutting unit 5, allows for adaptation to plastic pipes of different diameters without the need for specialized fixtures. To address cutting deviation, a triple protection system is constructed: conveying positioning, overall clamping, and cutting area contact. The conveyor belt 8 of the conveying and positioning unit 4 achieves stable conveying and anti-deviation through multi-directional contact with the pipe using surface rubber pads. The anti-deviation clamping block 15 within the mounting frame 3 provides overall clamping and limiting of the pipe. The four limiting blocks 22 within the planetary frame 18 precisely contact the cutting area, and the ball bearings on the limiting blocks 22 reduce friction interference. Simultaneously, the limiting frame 10 of the cutting base frame 1 and the limiting groove of the movable frame 2... 11. The telescopic protrusion 12 is locked to prevent the vibration displacement of the movable frame 2 from affecting the conveying positioning accuracy. To address the inconvenience of operation and maintenance, the movable frame 2 can be rotated 0-80 degrees around the hinge and is equipped with a front handle, which facilitates the rapid feeding of pipes and the maintenance of the conveying positioning unit 4 and the planetary cutting unit 5. To address the issues of cutting accuracy and finished product quality, the planetary carrier 18 rotates stably under the transmission of the drive motor 21, drive gear 20 and external gear ring 19. The cutting servo cylinder 27 drives the pre-cutting blade 29 to first form a positioning recess and then the main cutting blade 28 cuts to the full depth, reducing pipe deformation. After cutting, the grinding wheel 24 in the negative pressure groove 23 can grind the end face to further improve the quality. To address the issue of dust collection, the negative pressure groove 23 on the limit block 22 captures dust, which is then discharged synchronously through the negative pressure pipe 30, the extraction groove 31 and the annular extraction frame 32 that rotates with the planetary carrier 18, avoiding dust contamination and affecting accuracy.

[0038] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] 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. A plastic pipe cutting device with a pipe anti-deviation structure, comprising a cutting base frame (1) and a movable frame (2), wherein the movable frame (2) is rotatably mounted on both sides of the top of the cutting base frame (1), characterized in that, Conveying and positioning units (4) are provided inside the two movable frames (2) and on both sides inside the cutting base frame (1); a mounting frame (3) is also fixedly provided inside the cutting base frame (1) and between the two movable frames (2), and a planetary cutting unit (5) is also provided inside the mounting frame (3). The conveying and positioning unit (4) includes an arc-shaped fixed frame (6) and a conveyor belt (8). The arc-shaped fixed frame (6) is fixedly installed on both sides of the cutting base frame (1) and inside the two movable frames (2). The arc-shaped fixed frame (6) has an arc-shaped groove inside, and three conveyor frames (7) are arranged at equal angles inside the arc-shaped groove. The conveyor belt (8) is rotated inside the three conveyor frames (7) by a built-in motor. Three sets of conveying servo cylinders (9) are arranged at equal angles inside the arc-shaped fixed frame (6), and one end of the output shaft of the three sets of conveying servo cylinders (9) is fixedly connected to one side of the three conveyor frames (7).

2. The plastic pipe cutting device with a pipe anti-deviation structure according to claim 1, characterized in that, The cutting base frame (1) has two fixed limit frames (10) on both sides of the top front, and telescopic protrusions (12) are movably provided on both sides of the two limit frames (10). The front side of the bottom of the two movable frames (2) is provided with a limit groove (11) that cooperates with the limit frame (10), and the two sides inside the limit groove (11) are also provided with a limit groove that cooperates with the telescopic protrusion (12).

3. The plastic pipe cutting device with a pipe anti-deviation structure according to claim 1, characterized in that, The planetary cutting unit (5) includes a planetary carrier (18), the mounting frame (3) is provided with a rotating groove (17), and the planetary carrier (18) is rotatably provided inside the rotating groove (17). An external gear ring (19) is fixedly provided on the surface of the planetary carrier (18). A drive motor (21) is fixedly provided inside the mounting frame (3), and a drive gear (20) is fixedly provided at one end of the output shaft of the drive motor (21). The tooth surface of the drive gear (20) meshes with the tooth surface of the external gear ring (19) for transmission.

4. A plastic pipe cutting device with a pipe anti-deviation structure according to claim 3, characterized in that, The planetary carrier (18) is equipped with four limiting blocks (22) inside, and a negative pressure groove (23) is provided on one side of the four limiting blocks (22). Grinding wheels (24) are movably provided on both sides of the negative pressure groove (23) through a micro electric cylinder, and the grinding wheels (24) are driven by a built-in motor.

5. A plastic pipe cutting device with a pipe anti-deviation structure according to claim 4, characterized in that, Limit servo cylinders (25) are fixedly installed around the inside of the planetary carrier (18), and one end of the drive shaft of each of the four limit servo cylinders (25) is fixedly connected to one side of each of the four limit blocks (22).

6. A plastic pipe cutting device with a pipe anti-deviation structure according to claim 4, characterized in that, Each of the four limiting blocks (22) has several balls rotatably arranged on one side, and the four limiting servo cylinders (25) are arranged at equal angles about the central axis of the planetary carrier (18).

7. A plastic pipe cutting device with a pipe anti-deviation structure according to claim 4, characterized in that, The planetary carrier (18) is provided with a material extraction groove (31) inside, and the interiors of the four limiting blocks (22) are all connected to the interiors of the material extraction groove (31) through negative pressure pipes (30); the interior of the negative pressure groove (23) is connected to the interior of the negative pressure pipe (30), and the outer circumferential surface of the planetary carrier (18) is also rotatably provided with an annular material extraction rack (32), and the interior of the annular material extraction rack (32) is connected to the interior of the material extraction groove (31).

8. A plastic pipe cutting device with a pipe anti-deviation structure according to claim 7, characterized in that, One side of the annular material extraction rack (32) is fixedly connected to the interior of the mounting frame (3), and a material extraction pipe is provided on one side of the annular material extraction rack (32), with one end of the material extraction pipe extending to the front of the mounting frame (3).

9. A plastic pipe cutting device with a pipe anti-deviation structure according to claim 3, characterized in that, The planetary carrier (18) is also symmetrically fixed with two cutting servo cylinders (27), and one end of the drive shaft of each of the two cutting servo cylinders (27) is fixed with a cutting mounting seat (26). The two cutting mounting seats (26) are respectively equipped with a main cutting blade (28) and a pre-cutting blade (29) through a built-in motor.

10. A plastic pipe cutting device with a pipe anti-deviation structure according to claim 1, characterized in that, Several anti-offset servo cylinders (16) are fixedly installed on both sides inside the mounting bracket (3), and an anti-offset clamping block (15) is fixedly installed on one end of the drive shaft of each of the several anti-offset servo cylinders (16).

Images