Pipe fitting cutting machine

Abstract

The invention is suitable for the technical field of cutting, and provides a pipe fitting cutting machine which comprises a machine base and further comprises a pipe fitting positioning and rotating assembly, the pipe fitting positioning and rotating assembly is fixedly installed on the machine base and used for positioning a pipe fitting, and the pipe fitting positioning and rotating assembly is further used for driving a linear pipe fitting to rotate; the pipe fitting pressing and fixing assembly is fixedly installed on the machine base, and the pipe fitting pressing and fixing assembly is used for pressing the pipe fitting and is matched with the pipe fitting positioning and rotating assembly to integrally fix the pipe fitting; and the pipe fitting cutting assembly is fixedly installed on the machine base, and the pipe fitting cutting assembly is used for conducting plain end cutting or angle cutting on the pipe fitting. Precise positioning and firm fixing of the pipe fitting are achieved, the position and the cutting angle of the pipe fitting can be flexibly adjusted, the device is further suitable for ring cutting operation of the large-pipe-diameter pipe fitting, and the machining efficiency and quality are remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of cutting, and in particular relates to a pipe cutting machine. Background Art

[0002] A pipe cutting machine is a mechanical device specially used for cutting pipes or tubes. According to different needs and application scenarios, pipe cutting machines can be divided into many types, including but not limited to manual pipe cutting machines, electric pipe cutting machines, laser cutting machines, etc. Among them, electric pipe cutting machines use electric power to drive the cutting wheel for cutting, which is suitable for cutting pipes with larger diameters. Compared with manual cutting machines, electric cutting machines have higher efficiency and better cutting quality, but the price is also relatively high.

[0003] Existing metal pipe cutting machines cannot quickly locate and fix pipes, cannot flexibly adjust the position and cutting angle of pipes, and have a small cutting range, which affects processing efficiency and quality. Therefore, in view of the above situation, it is urgent to develop a pipe cutting machine to overcome the shortcomings in current practical applications. Summary of the invention

[0004] The object of the present invention is to provide a pipe cutting machine, aiming to solve the problems mentioned in the above background technology.

[0005] The present invention is implemented in this way: a pipe cutting machine includes a machine base and also includes: A pipe fitting positioning and rotating assembly, which is fixedly mounted on the machine base and used to position the pipe fittings. The pipe fitting positioning and rotating assembly is also used to drive the linear pipe fittings to rotate; A pipe fitting pressing and fixing assembly, which is installed and fixed on the machine base, and is used to press the pipe fitting and cooperate with the pipe fitting positioning and rotating assembly to fix the pipe fitting as a whole; A pipe cutting assembly is installed and fixed on a machine base, and is used for performing flat cutting or angle cutting on pipes.

[0006] A further technical solution is that the pipe positioning and rotating assembly includes a support fixed on the machine base, a top groove is provided in the middle of the top of the support, a cavity is also provided on the inner side of the support, an arc-shaped support plate is respectively provided on both sides of the top groove, and a rotating wheel for driving the pipe to rotate is respectively installed on both sides of the top of the arc-shaped support plate, a vertical telescopic cylinder D is fixed in the middle of the bottom of the cavity, a U-shaped frame is fixed on the end of the telescopic core shaft of the vertical telescopic cylinder D, and the two side branches of the U-shaped frame slide into the top groove and are fixedly connected to the middle of the bottom of the two arc-shaped support plates; a plurality of positioning rods are evenly distributed on the periphery of the top groove, the lower end of the positioning rod slides into the cavity and is fixed with a slide, a vertical cylinder is slidably provided on the outer side of the slide, and a spring for elastically supporting the slide is also provided in the vertical cylinder, the lower end of the vertical cylinder is fixedly connected to the annular plate, and a plurality of vertical telescopic cylinders C are circumferentially distributed and fixed on the lower side of the annular plate, and the lower end of the vertical telescopic cylinder C is fixed to the bottom of the cavity.

[0007] According to a further technical solution, the arc-shaped support plate is an arc-shaped concave structure in the middle.

[0008] A further technical solution is that at least two pipe pressing and fixing assemblies are arranged, and the pipe pressing and fixing assemblies include a vertical telescopic cylinder A fixed on the machine base, a top cap is rotatably installed on the end of the telescopic core shaft of the vertical telescopic cylinder A, a horizontal cylinder is fixed on the side of the top cap, an inner rod is slidably installed in the horizontal cylinder, a vertical rod is rotatably installed on the lower side of one end of the inner rod away from the horizontal cylinder, and an arc-shaped pressure plate is fixed on the lower end of the vertical rod.

[0009] According to a further technical solution, the vertical telescopic cylinder A and the top cap as well as the vertical rod and the inner rod are connected in a damped rotation manner, and the horizontal cylinder and the inner rod are connected in a damped sliding manner.

[0010] According to a further technical solution, a fastening bolt A for locking and fixing the top cap is installed on the top cap, a fastening bolt B for locking and fixing the inner rod is installed on the horizontal cylinder, and a fastening bolt C for locking and fixing the vertical rod is installed on the inner rod.

[0011] According to a further technical solution, the arc-shaped pressure plate adopts a middle arc-shaped concave structure, and a plurality of ball bearings are installed on the lower side of the arc-shaped pressure plate.

[0012] According to a further technical solution, a fixing cavity is provided in the middle of the top of the top cap, and a fastening bolt A is threadedly connected to the fixing cavity. A side cavity is also provided on the outside of the fixing cavity inside the top cap, and an anti-slip ring is fixed to the outer side of the lower part of the fastening bolt A, which is slidably and rotatably connected to the side cavity.

[0013] A further technical solution is that the pipe cutting assembly includes a T-shaped frame arranged above the pipe positioning and rotating assembly, vertical telescopic cylinders B are fixed to the lower sides of both ends of the T-shaped frame, the lower ends of the vertical telescopic cylinders B are fixed to the machine base, and the middle branch end of the T-shaped frame is hinged with a mounting frame, a cutting wheel and a motor for driving the cutting wheel to rotate are installed on the mounting frame, and an angle adjustment telescopic cylinder is also hinged on the upper part of the mounting frame, and the other end of the angle adjustment telescopic cylinder is hinged to the T-shaped frame.

[0014] A further technical solution is that a driving cavity is opened on the inner side of the mounting frame, the output shaft of the motor extends into the driving cavity, and a driving pulley is fixed on the output shaft of the motor, a cutting shaft is passed through the middle of the cutting wheel, a positioning ring is fixed on the cutting shaft on one side of the cutting wheel, and a fixing nut for locking the cutting wheel is provided on the cutting shaft on the other side of the cutting wheel, the cutting shaft extends into the driving cavity, and a driven pulley is fixed on the cutting shaft, and the driven pulley and the driving pulley are connected by a transmission belt.

[0015] According to a further technical solution, the output shaft and the cutting shaft of the motor are also rotatably connected to the mounting frame; a bearing seat B is rotatably mounted on the end of the output shaft of the motor, and the bearing seat B is fixed on the cavity wall of the driving cavity; a bearing seat A is rotatably mounted on the end of the cutting shaft, and the bearing seat A is fixed on the cavity wall of the driving cavity.

[0016] The pipe cutting machine provided by the present invention has the following beneficial effects: Through the matching setting of the pipe fitting positioning and rotating assembly and the pipe fitting pressing and fixing assembly, the pipe fitting positioning and rotating assembly can position the pipe fitting and drive the linear pipe fitting to rotate. The pipe fitting pressing and fixing assembly can press the pipe fitting and cooperate with the pipe fitting positioning and rotating assembly to fix the pipe fitting as a whole, thus realizing the positioning and fixing of the pipe fitting, facilitating the subsequent cutting process, and also driving the linear pipe fitting to rotate, further facilitating the ring cutting operation, and meeting the processing requirements of large-diameter pipe fittings. Through the setting of the pipe fitting cutting assembly, the pipe fitting can be cut flat or at an angle to meet different processing requirements.

[0017] To sum up, the present invention, through the cooperation of the pipe positioning and rotating assembly and the pipe pressing and fixing assembly, not only achieves the precise positioning and firm fixation of the pipe, but also can flexibly adjust the position and cutting angle of the pipe, effectively supports the rotation and cutting operations of linear pipes, especially for the ring cutting operation of large diameter pipes, and significantly improves the processing efficiency and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a pipe cutting machine provided in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of a pipe cutting assembly in a pipe cutting machine provided in an embodiment of the present invention; Figure 3 for Figure 2 A schematic diagram of a partial cross-sectional structure of the main view; Figure 4 A schematic diagram of the structure of a pipe pressing and fixing component part in a pipe cutting machine provided in an embodiment of the present invention; Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of the middle top hat portion; Figure 6 for Figure 5 A schematic diagram of the enlarged structure of part A; Figure 7 A schematic diagram of the front and cross-sectional structure of a pipe positioning and rotating assembly part of a pipe cutting machine provided in an embodiment of the present invention; Figure 8 for Figure 7 Schematic diagram of the enlarged structure of part B.

[0019] In the figure: 1- base, 2- pipe pressing and fixing assembly, 3- pipe cutting assembly, 4- pipe positioning and rotating assembly, 21- vertical telescopic cylinder A, 22- top cap, 23- fastening bolt A, 24- horizontal cylinder, 25- fastening bolt B, 26- inner rod, 27- fastening bolt C, 28- vertical rod, 29- arc pressure plate, 210- against the solid cavity, 211- side cavity, 212- anti-slip ring, 31- vertical telescopic cylinder B, 32- T-shaped frame, 33- angle adjustment telescopic cylinder, 34- mounting frame, 35- motor, 36- cutting Cutting wheel, 37-driving chamber, 38-transmission belt, 39-cutting shaft, 310-fixing nut, 311-positioning ring, 312-driven pulley, 313-bearing seat A, 314-driving pulley, 315-bearing seat B, 41-positioning rod, 42-support, 43-slide plate, 44-spring, 45-vertical cylinder, 46-annular plate, 47-vertical telescopic cylinder C, 48-U-shaped frame, 49-vertical telescopic cylinder D, 410-top groove, 411-cavity, 412-arc support plate, 413-rotating wheel. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0022] like Figure 1 As shown, a pipe cutting machine provided by an embodiment of the present invention includes a machine base 1 and further includes: The pipe fitting positioning and rotating assembly 4 is installed and fixed on the machine base 1. The pipe fitting positioning and rotating assembly 4 is used to position the pipe fitting. The pipe fitting positioning and rotating assembly 4 is also used to drive the linear pipe fitting to rotate. The pipe fitting pressing and fixing assembly 2 is installed and fixed on the machine base 1. The pipe fitting pressing and fixing assembly 2 is used to press the pipe fitting and cooperate with the pipe fitting positioning and rotating assembly 4 to fix the pipe fitting as a whole; The pipe cutting assembly 3 is installed and fixed on the machine base 1, and the pipe cutting assembly 3 is used for performing flat cutting or angle cutting on the pipe.

[0023] In the embodiment of the present invention, through the matching arrangement of the pipe fitting positioning and rotating assembly 4 and the pipe fitting pressing and fixing assembly 2, the pipe fitting positioning and rotating assembly 4 can position the pipe fitting and drive the linear pipe fitting to rotate, the pipe fitting pressing and fixing assembly 2 can press the pipe fitting and cooperate with the pipe fitting positioning and rotating assembly 4 to fix the pipe fitting as a whole, thus achieving the positioning and fixing of the pipe fitting, facilitating the subsequent cutting process, and also being able to drive the linear pipe fitting to rotate, further facilitating the ring cutting operation, and meeting the processing requirements of large diameter pipe fittings. Through the arrangement of the pipe fitting cutting assembly 3, the pipe fitting can be cut flat or at an angle to meet different processing requirements.

[0024] To sum up, the present invention, through the cooperation of the pipe positioning and rotating component 4 and the pipe pressing and fixing component 2, not only achieves the precise positioning and firm fixation of the pipe, but also can flexibly adjust the position of the pipe and the cutting angle, effectively supports the rotation and cutting operations of linear pipes, especially for the ring cutting operation of large diameter pipes, and significantly improves the processing efficiency and quality.

[0025] like Figure 1 , 7 -8, as a preferred embodiment of the present invention, the pipe positioning and rotating assembly 4 includes a support 42 fixed on the base 1, a top groove 410 is provided in the middle of the top of the support 42, a cavity 411 is also provided on the inner side of the support 42, an arc-shaped support plate 412 is provided on both sides of the top groove 410, and a rotating wheel 413 for driving the pipe to rotate is installed on both sides of the top of the arc-shaped support plate 412, and the power structure of the rotating wheel 413 is not limited. The rotating wheel 411 is used to rotate the pipe. 3 pairs of pipe supports can drive the pipe to rotate. A vertical telescopic cylinder D49 is fixed in the middle of the bottom of the cavity 411. A U-shaped frame 48 is fixed at the end of the telescopic core shaft of the vertical telescopic cylinder D49. The two side branches of the U-shaped frame 48 slide into the top groove 410 and are fixedly connected to the middle of the bottom of the two arc-shaped support plates 412. The vertical telescopic cylinder D49 can be used to drive the two arc-shaped support plates 412 to rise and fall at the same time, thereby cooperating with the rotating wheel 413 to transmit the pipe to meet the needs of pipe cutting and rotation.

[0026] Preferably, the arc-shaped support plate 412 is an arc-shaped concave structure in the middle, which is conducive to the centering of the pipe fitting and the cooperation of the rotating wheels 413 on both sides of the arc-shaped support plate 412 to drive the pipe fitting to rotate.

[0027] A plurality of positioning rods 41 are evenly distributed on the periphery of the top groove 410, the lower ends of the positioning rods 41 slide into the cavity 411 and are fixed with a slide plate 43, a vertical cylinder 45 is slidably provided on the outer side of the slide plate 43, a spring 44 for elastically supporting the slide plate 43 is also provided in the vertical cylinder 45, the lower end of the vertical cylinder 45 is fixedly connected to the annular plate 46, a plurality of vertical telescopic cylinders C47 are circumferentially distributed and fixed on the lower side of the annular plate 46, and the lower end of the vertical telescopic cylinder C47 is fixed to the bottom of the cavity 411.

[0028] When the pipe fitting presses the positioning rod 41, the corresponding positioning rod 41 is pressed according to the shape of the pipe fitting, so that the remaining positioning rods 41 can laterally limit the pipe fitting, thereby ensuring the stability of the pipe fitting; the pipe fitting can be fixed close to the upper surface of the support 42, or the positioning rod 41 can be used to position the pipe fitting at a suitable position according to the extreme telescopic position of the positioning rod 41; the top groove 410 serves as a cutting accommodating port and an installation port for the arc-shaped support plate 412 and the rotating wheel 413, and is reliable in application.

[0029] In addition, the height position of the annular plate 46 can be adjusted by the vertical telescopic cylinder C47 to meet the positioning requirements of different types of pipe fittings. At the same time, it is beneficial to control the upper end of the positioning rod 41 under the pipe fitting when rotating the pipe fitting, which is beneficial for the rotating wheel 413 to drive the pipe fitting to rotate. Figure 7 It is only a schematic diagram. The height of the cavity 411 and the lifting height of the vertical telescopic cylinder C47 can be adjusted as needed, and will not be described in detail.

[0030] like Figure 1 , 4 -6, as a preferred embodiment of the present invention, at least two pipe fitting pressing and fixing assemblies 2 are provided, and the pipe fitting pressing and fixing assemblies 2 include a vertical telescopic cylinder A21 fixed on the machine base 1, and a top cap 22 is rotatably installed on the end of the telescopic core shaft of the vertical telescopic cylinder A21, and a horizontal cylinder 24 is fixed on the side of the top cap 22, and an inner rod 26 is slidably installed in the horizontal cylinder 24, and a vertical rod 28 is rotatably installed on the lower side of one end of the inner rod 26 away from the horizontal cylinder 24, and an arc-shaped pressure plate 29 is fixed on the lower end of the vertical rod 28.

[0031] Preferably, the vertical telescopic cylinder A21 and the top cap 22, and the vertical rod 28 and the inner rod 26 are all connected in a damped rotation, and the horizontal cylinder 24 and the inner rod 26 are connected in a damped sliding manner. In order to achieve more reliable fixation, the top cap 22 is provided with a fastening bolt A23 for locking and fixing it, the horizontal cylinder 24 is provided with a fastening bolt B25 for locking and fixing the inner rod 26, and the inner rod 26 is provided with a fastening bolt C27 for locking and fixing the vertical rod 28.

[0032] Preferably, the arc-shaped pressure plate 29 adopts a middle arc-shaped concave structure. In order to adapt to the rotating wheel 413 to drive the pipe to rotate, a plurality of balls (not shown) are also installed on the lower side of the arc-shaped pressure plate 29. This eliminates resistance to the driving of the pipe, thereby improving reliability. The structure of the arc-shaped support plate 412 and the arc-shaped pressure plate 29 ensures that the pipe will not slip.

[0033] Specifically, the fastening bolt A23 is taken as an example for explanation: a fixing cavity 210 is opened in the middle of the top of the top cap 22, and the fastening bolt A23 is threadedly connected to the fixing cavity 210. A side cavity 211 is also opened on the outside of the fixing cavity 210 in the top cap 22. An anti-slip ring 212 is fixed to the outer side of the lower part of the fastening bolt A23, which is slidably and rotatably connected to the side cavity 211. In this way, the anti-slip ring 212 can limit the fastening bolt A23 from slipping out. The top cap 22 can be flexibly rotated by simply rotating the fastening bolt A23 to separate it from the vertical telescopic cylinder A21; the top cap 22 can be locked and fixed by rotating the fastening bolt A23 to abut against the vertical telescopic cylinder A21, which is convenient and quick.

[0034] Through the structural arrangement of the pipe pressing and fixing assembly 2, the height position of the arc pressure plate 29 can be controlled by the vertical telescopic cylinder A21 to meet the needs of pressing and fixing; the rotation of the horizontal cylinder 24, the pushing and pulling of the inner rod 26, and the rotation and adjustment of the arc pressure plate 29 are adapted to the pressing and fixing needs of pipes of different shapes. The application is flexible and convenient, so that the device can cut and process pipes of any shape.

[0035] like Figure 1-3 As shown, as a preferred embodiment of the present invention, the pipe cutting assembly 3 includes a T-shaped frame 32 arranged above the pipe positioning and rotating assembly 4, and vertical telescopic cylinders B31 are fixed to the lower sides of both ends of the T-shaped frame 32, and the lower end of the vertical telescopic cylinder B31 is fixed to the machine base 1. The middle branch end of the T-shaped frame 32 is hinged with a mounting frame 34, and a cutting wheel 36 and a motor 35 for driving the cutting wheel 36 to rotate are installed on the mounting frame 34. The upper part of the mounting frame 34 is also hinged with an angle adjustment telescopic cylinder 33, and the other end of the angle adjustment telescopic cylinder 33 is hinged to the T-shaped frame 32.

[0036] Preferably, a driving cavity 37 is opened on the inner side of the mounting frame 34, the output shaft of the motor 35 extends into the driving cavity 37, and a driving pulley 314 is fixed on the output shaft of the motor 35, a cutting shaft 39 is passed through the middle of the cutting wheel 36, a positioning ring 311 is fixed on the cutting shaft 39 on one side of the cutting wheel 36, and a fixing nut 310 for locking and fixing the cutting wheel 36 is provided on the cutting shaft 39 on the other side of the cutting wheel 36, the cutting shaft 39 extends into the driving cavity 37, and a driven pulley 312 is fixed on the cutting shaft 39, and the driven pulley 312 and the driving pulley 314 are connected by a transmission belt 38.

[0037] Furthermore, the output shaft of the motor 35 and the cutting shaft 39 are also rotatably connected to the mounting frame 34, thereby improving the reliability of the transmission; the end of the output shaft of the motor 35 is rotatably mounted with a bearing seat B315, and the bearing seat B315 is fixed on the cavity wall of the driving cavity 37; the end of the cutting shaft 39 is rotatably mounted with a bearing seat A313, and the bearing seat A313 is fixed on the cavity wall of the driving cavity 37, thereby further improving the stability of the transmission.

[0038] Through the structural arrangement of the pipe cutting assembly 3, the vertical telescopic cylinder B31 can be used to control the lifting of the T-shaped frame 32, and the angle adjustment telescopic cylinder 33 can control the inclination of the mounting frame 34, so as to meet the requirements of the cutting wheel 36 for flat cutting (when the cutting wheel 36 is vertical) or angle cutting (when the cutting wheel 36 is tilted). In addition, the driving structure of the motor 35 for the cutting wheel 36 is stable and reliable, with good concealment, and the cutting wheel 36 is easy to replace and fix, and is convenient to use.

[0039] The above embodiment of the present invention provides a pipe cutting machine, the main working principle of which is as follows: The pipe is placed on the arc-shaped support plate 412 of the pipe positioning and rotating assembly 4 and supported by the rotating wheel 413. When the pipe needs to be rotated, the rotating wheel 413 drives the pipe to rotate. In this process, the height of the arc-shaped support plate 412 can be adjusted by controlling the U-shaped frame 48 to move up and down through the vertical telescopic cylinder D49 to ensure that the pipe is in a suitable rotation position.

[0040] The pipe pressing and fixing assembly 2 drives the top cap 22 to move downward through the vertical telescopic cylinder A21, so that the arc-shaped pressing plate 29 contacts and presses the pipe. In order to adapt to pipes of different diameters and shapes, the position of the arc-shaped pressing plate 29 can be changed by adjusting the position of the inner rod 26 in the horizontal cylinder 24 and the angle of the vertical rod 28 to achieve the best fixing effect. The fastening bolts A23, B25 and C27 are used to lock the positions of these components to ensure that the pipe remains stable during processing.

[0041] The cutting operation is performed by the pipe cutting assembly 3. The T-shaped frame 32 is controlled to move up and down by the vertical telescopic cylinder B31, and the mounting frame 34 is adjusted to the tilt angle by the angle adjustment telescopic cylinder 33 to achieve flat cutting or angle cutting. The motor 35 drives the cutting wheel 36 to rotate through the belt drive system to cut the pipe. The rotation connection between the cutting shaft 39 and the mounting frame 34 ensures that the cutting wheel 36 can rotate smoothly, and the quick replacement mechanism of the cutting wheel 36 improves the flexibility and work efficiency of the equipment.

[0042] In summary, the present invention combines precise positioning, stable fixation and flexible cutting functions, and is also suitable for processing complex processing tasks such as ring cutting of large-diameter pipe fittings, and can effectively improve processing accuracy and production efficiency.

[0043] The PLC controller disclosed in the prior art can be used to control each component. The model and circuit connection of each component are not specifically limited and can be flexibly set in actual application.

[0044] The circuits, electronic components and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to software and methods.

[0045] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A pipe cutting machine, comprising a machine base (1), characterized in that: Also includes: A pipe fitting positioning and rotating assembly (4), wherein the pipe fitting positioning and rotating assembly (4) is mounted and fixed on the machine base (1), and the pipe fitting positioning and rotating assembly (4) is used to position the pipe fitting, and the pipe fitting positioning and rotating assembly (4) is also used to drive the linear pipe fitting to rotate; A pipe fitting pressing and fixing assembly (2), wherein the pipe fitting pressing and fixing assembly (2) is mounted and fixed on the machine base (1), and the pipe fitting pressing and fixing assembly (2) is used to press the pipe fitting and cooperate with the pipe fitting positioning and rotating assembly (4) to fix the pipe fitting as a whole; A pipe cutting assembly (3), wherein the pipe cutting assembly (3) is mounted and fixed on the machine base (1), and the pipe cutting assembly (3) is used to perform flat cutting or angle cutting on the pipe.

2. The pipe cutting machine according to claim 1, characterized in that: The pipe positioning and rotating assembly (4) comprises a support (42) fixed on the machine base (1), a top groove (410) is provided in the middle of the top of the support (42), and a cavity (411) is also provided on the inner side of the support (42); An arc-shaped support plate (412) is respectively provided on both sides of the top groove (410), and the arc-shaped support plate (412) is a middle arc-shaped concave structure. A rotating wheel (413) for driving the pipe fitting to rotate is respectively installed on both sides of the top of the arc-shaped support plate (412). A vertical telescopic cylinder D (49) is fixed in the middle of the bottom of the cavity (411). A U-shaped frame (48) is fixed at the end of the telescopic core shaft of the vertical telescopic cylinder D (49). The branches on both sides of the U-shaped frame (48) slide into the top groove (410) and are fixedly connected to the middle of the bottom of the two arc-shaped support plates (412) accordingly. A plurality of positioning rods (41) are evenly distributed on the periphery of the top groove (410); the lower ends of the positioning rods (41) slide into the cavity (411) and are fixed with a slide plate (43); a vertical cylinder (45) is slidably provided on the outer side of the slide plate (43); a spring (44) for elastically supporting the slide plate (43) is also provided in the vertical cylinder (45); the lower end of the vertical cylinder (45) is fixedly connected to the annular plate (46); a plurality of vertical telescopic cylinders C (47) are circumferentially distributed and fixed on the lower side of the annular plate (46); the lower ends of the vertical telescopic cylinders C (47) are fixed to the bottom of the cavity (411).

3. The pipe cutting machine according to claim 1 or 2, characterized in that: At least two of the pipe fitting pressing and fixing assemblies (2) are provided, and the pipe fitting pressing and fixing assemblies (2) comprise a vertical telescopic cylinder A (21) fixed on the machine base (1), and a top cap (22) is rotatably mounted on the end of the telescopic core shaft of the vertical telescopic cylinder A (21); A horizontal cylinder (24) is fixed to the side of the top cap (22), an inner rod (26) is slidably mounted in the horizontal cylinder (24), a vertical rod (28) is rotatably mounted on the lower side of one end of the inner rod (26) away from the horizontal cylinder (24), and an arc-shaped pressing plate (29) is fixed to the lower end of the vertical rod (28).

4. The pipe cutting machine according to claim 3, characterized in that: The vertical telescopic cylinder A (21) and the top cap (22) as well as the vertical rod (28) and the inner rod (26) are all connected in a damped rotation manner; The transverse cylinder (24) and the inner rod (26) are connected in a damping sliding manner.

5. The pipe cutting machine according to claim 4, characterized in that: The top cap (22) is provided with a fastening bolt A (23) for locking and fixing the top cap (22), the horizontal cylinder (24) is provided with a fastening bolt B (25) for locking and fixing the inner rod (26), and the inner rod (26) is provided with a fastening bolt C (27) for locking and fixing the vertical rod (28).

6. The pipe cutting machine according to claim 3, characterized in that: The arc-shaped pressing plate (29) adopts a middle arc-shaped upward concave structure, and a plurality of balls are installed on the lower side of the arc-shaped pressing plate (29).

7. The pipe cutting machine according to claim 5, characterized in that: A fixing cavity (210) is provided in the middle of the top of the top cap (22), and a fastening bolt A (23) is threadedly connected to the fixing cavity (210); A side cavity (211) is further provided on the outside of the fixing cavity (210) in the top cap (22), and an anti-slip ring (212) is fixed to the outside of the lower part of the fastening bolt A (23) and is slidably and rotatably connected to the side cavity (211).

8. The pipe cutting machine according to claim 1 or 2, characterized in that: The pipe cutting assembly (3) comprises a T-shaped frame (32) arranged above the pipe positioning and rotating assembly (4), vertical telescopic cylinders B (31) are fixed to the lower sides of both ends of the T-shaped frame (32), and the lower end of the vertical telescopic cylinder B (31) is fixed to the machine base (1); A mounting frame (34) is hingedly connected to the end of the middle branch of the T-shaped frame (32), and a cutting wheel (36) and a motor (35) for driving the cutting wheel (36) to rotate are mounted on the mounting frame (34); An angle-adjusting telescopic cylinder (33) is also hingedly connected to the upper portion of the mounting frame (34), and the other end of the angle-adjusting telescopic cylinder (33) is hingedly connected to the T-shaped frame (32).

9. The pipe cutting machine according to claim 8, characterized in that: A driving cavity (37) is provided on the inner side of the mounting frame (34), the output shaft of the motor (35) extends into the driving cavity (37), and a driving pulley (314) is fixed on the output shaft of the motor (35); A cutting shaft (39) is passed through the middle of the cutting wheel (36), a positioning ring (311) is fixed on the cutting shaft (39) on one side of the cutting wheel (36), and a fixing nut (310) for locking and fixing the cutting wheel (36) is provided on the cutting shaft (39) on the other side of the cutting wheel (36); The cutting shaft (39) extends into the driving cavity (37), and a driven pulley (312) is fixed on the cutting shaft (39); The driven pulley (312) and the driving pulley (314) are connected via a transmission belt (38).

10. The pipe cutting machine according to claim 9, characterized in that: The output shaft of the motor (35) and the cutting shaft (39) are also rotatably connected to the mounting frame (34); A bearing seat B (315) is rotatably mounted on the end of the output shaft of the motor (35), and the bearing seat B (315) is fixed on the cavity wall of the driving cavity (37); A bearing seat A (313) is rotatably mounted on the end of the cutting shaft (39), and the bearing seat A (313) is fixed on the cavity wall of the driving cavity (37).

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