Pipe fitting rotary cutting device and pipe fitting rotary cutting method applying same

Abstract

The invention relates to a pipe fitting rotary cutting device and a pipe fitting rotary cutting method applying the device, the device comprises a rotary cutting mechanism, a positioning mechanism used for positioning a pipe fitting and a clamping mechanism used for clamping the pipe fitting, and the pipe fitting comprises a redundant linear section and a bent section; the positioning mechanism comprises a positioning sleeve and a first driving assembly used for driving the positioning sleeve to do linear motion in the axial direction, the end face, in the length direction, of the positioning sleeve abuts against the end face, away from the bent section, of the redundant linear section, and the end face, away from the pipe fitting, of the positioning sleeve is connected with the first driving assembly. According to the pipe fitting rotary cutting device, the requirement for more flush sizes can be met, the convenience and accuracy of positioning can be improved, and the universality of the pipe fitting rotary cutting device is improved to a great extent.

Description

Technical Field

[0001] The invention relates to the technical field of rotary cutting devices, and in particular to a pipe rotary cutting device and a pipe rotary cutting method using the device. Background Art

[0002] Thin-walled bent pipes are commonly found in various mechanical systems, which are used to transport oil, water, wind, etc. Many pipes are arranged in a limited space, and need to be cut after bending. During the cutting process, it is difficult to locate the pipe because the cutting position is close to the bending area. Summary of the invention

[0003] In order to facilitate the positioning of pipes and improve the cutting effect of pipes, the present application provides a pipe rotary cutting device.

[0004] In a first aspect, the present application provides a pipe peeling device, comprising a peeling mechanism, a positioning mechanism for positioning the pipe, and a clamping mechanism for clamping the pipe, wherein the pipe comprises redundant straight segments and curved segments; The positioning mechanism includes a positioning sleeve and a first driving assembly for driving the positioning sleeve to perform linear motion along the axial direction. The end face of the positioning sleeve in the length direction abuts against the end face of the excess straight section away from the curved section, and the end face of the positioning sleeve away from the pipe is connected to the first driving assembly.

[0005] The beneficial effects of the present invention are as follows: the first drive assembly drives the positioning sleeve to move linearly along the axial direction, the clamping mechanism clamps the pipe fitting, and the rotary cutting mechanism rotary cuts the pipe fitting after the pipe fitting is positioned and clamped. The position of the pipe fitting in the clamp can be easily adjusted by the first drive assembly so that the positioning sleeve and the pipe fitting remain in abutment. For parts with the same pipe diameter, only the positioning point needs to be adjusted, without excessive consideration of different sizes of part bends or errors in the manufacture, which greatly improves the versatility and convenience of the pipe rotary cutting device. This can not only meet the requirements of more flush sizes, but also increase the convenience and accuracy of positioning, greatly improving the versatility of the pipe rotary cutting device.

[0006] Furthermore, the clamping mechanism includes a clamping tube, a tapered sleeve and a second driving assembly for driving the clamping tube to move axially, the clamping tube sleeve is arranged on the outside of the pipe fitting, the second driving assembly is connected to the end of the clamping tube away from the pipe fitting, the tapered sleeve is arranged on the outside of the clamping tube, the tapered sleeve is fixed in the rotary cutting mechanism, the inner hole of the tapered sleeve gradually shrinks in the direction approaching the second driving assembly, and the tapered sleeve abuts against the clamping tube.

[0007] The beneficial effect of adopting the above further solution is that the second driving assembly is used to drive the clamp to move axially, so that the cone sleeve on the outer periphery squeezes the clamp inward, and then the clamp clamps the pipe fitting to complete the clamping of the pipe fitting.

[0008] Furthermore, the second driving assembly includes a first mounting bracket, a first motor, a linear bearing and a movable bracket, the first motor is mounted on the first mounting bracket, the output end of the first motor is connected to the linear bearing, the output end of the linear bearing is connected to the movable bracket, and the movable bracket is connected to the end of the clamp away from the pipe fitting.

[0009] The beneficial effect of adopting the above further scheme is: the first motor provides a tightening force, and the rotation is converted into a linear motion along the axis of the clamp tube through the linear bearing. The linear bearing drives the movable bracket connected thereto to move, and the movable bracket pulls the clamp tube to move linearly along the axial direction, so that the cone sleeve squeezes the clamp tube, and the clamp tube shrinks inward due to the squeezing, thereby achieving the purpose of clamping the pipe fitting.

[0010] Furthermore, the first driving assembly includes a pull rod, a second mounting bracket and a power piece, the second mounting bracket is fixedly connected to the upper surface of the first mounting bracket, the power piece is installed on the second mounting bracket, the telescopic end of the power piece is fixedly connected to the pull rod, and the end of the pull rod away from the power piece is fixedly connected to the positioning sleeve.

[0011] The beneficial effect of adopting the above further solution is that the power member drives the positioning sleeve to move linearly through the pull rod, which makes it easier for the positioning sleeve to adjust the positioning position.

[0012] Furthermore, the positioning mechanism also includes a core shaft for supporting the pipe fitting, and the core shaft is located inside the pipe fitting.

[0013] The beneficial effect of adopting the above further solution is that the mandrel supports the pipe fitting, thereby reducing the possibility of deformation of the pipe fitting during the peeling process.

[0014] Furthermore, the peeling mechanism includes a peeling cutter, a second motor, a conveyor belt, a clamping cylinder, a bearing seat and a central rotating shaft. The blade of the peeling cutter itself is not fixed axially. The central rotating shaft is located inside the bearing seat. The second motor transmits power to the central rotating shaft through the conveyor belt. The central rotating shaft is connected to the clamping cylinder. The central rotating shaft is used to drive the clamping cylinder to rotate. The clamping cylinder is connected to the peeling cutter. The clamping cylinder drives the peeling cutter to move forward and backward along the radius of the clamping cylinder.

[0015] The beneficial effect of adopting the above further scheme is that the second motor outputs a suitable speed and transmits it to the central rotating shaft through the conveyor belt, the central rotating shaft drives the clamping cylinder to rotate, and the clamping cylinder itself can provide power to drive the rotary cutter to advance in the centripetal direction, so that the blade of the rotary cutter cuts into the pipe fitting, completing the pipe fitting end-to-end process. The rotary cutter squeezes and peels the pipe fitting, realizing chip-free cutting and reducing the risk of contamination of the cleanliness of the inner cavity of the pipe fitting.

[0016] Furthermore, the core shaft includes a plurality of connecting blocks, the clamping tube includes a first part of a complete tubular structure and a second part of a multi-petal tubular structure, the number of petals of the second part corresponds to the number of the connecting blocks, the positioning sleeve includes a third part of a complete tubular structure and a fourth part of a multi-petal tubular structure, the number of petals of the fourth part corresponds to the number of the connecting blocks; each of the connecting blocks passes through the space formed by the petals in the fourth part and the space formed by the petals in the second part, and is fixedly connected to the central rotating shaft; a rotating assembly is provided between the clamping tube and the movable bracket.

[0017] The beneficial effect of adopting the above further scheme is that during the rotary cutting process of the pipe fitting, the pipe fitting does not move, and the rotary cutter cooperates with the rotating mandrel to make the blade of the rotary cutter and the pipe fitting move relative to each other, which helps to reduce the squeezing force of the rotary cutter on the pipe fitting and reduces the possibility of the pipe fitting's mouth being out of round; the bent thin-walled pipe fitting does not rotate, which can reduce the risk of interference and improve safety.

[0018] Furthermore, one side of the cutting edge of the rotary cutter is provided with a step.

[0019] The beneficial effect of adopting the above further solution is that it can not only increase the strength of the rotary cutter, but also continue to apply pressure to the pipe after the pipe is cut, which can play a role in rounding the pipe opening at the cut point of the pipe to a certain extent.

[0020] Furthermore, the core shaft comprises a cutting knife groove corresponding to the position of the rotary cutter, the cutting knife groove is located at the end of the core shaft away from the connecting block, and the cutting knife groove is arranged along the circumference of the core shaft.

[0021] The beneficial effect of adopting the above further scheme is that after the pipe fitting is cut, the cutting edge of the rotary cutter can enter the cutting groove, which can provide space for the cutting edge outside the step part of the rotary cutter, reducing the possibility of the rotary cutter damaging the core shaft, and facilitating the step part of the rotary cutter to align the pipe opening at the cut point of the pipe fitting.

[0022] In a second aspect, the present application provides a pipe peeling method, comprising: Step S1: Based on the current pipe end length requirement, the advance and retreat distance of the first driving component is calculated with the center of the rotary cutter as the origin, so that the first driving component drives the positioning sleeve to move linearly along the axial direction to achieve the purpose of pipe positioning; Step S2: if the positioning sleeve moves into place, the clamping mechanism is started to clamp the pipe fitting; Step S3: If the clamping mechanism completes clamping the pipe, the peeling mechanism is started, and the peeling mechanism rotates around the pipe to peel the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the pipe peeling device according to an embodiment of the present application; Figure 2 This is a schematic diagram of the structure of the clamping mechanism of an embodiment of the present application; Figure 3 This is a cross-sectional view of a pipe peeling device according to an embodiment of the present application; Figure 4 A cross-sectional view showing the positioning mechanism structure of an embodiment of the present application; Figure 5 for Figure 4 The enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the structure of the rotary cutting mechanism of an embodiment of the present application; Figure 7 This is a schematic diagram of the structure of the rotary cutter in the embodiment of the present application; Figure 8 This is a schematic diagram of the structure of the mandrel of an embodiment of the present application; Fig. 9 This is a schematic diagram of the structure of the clamping tube according to an embodiment of the present application; Fig.10 It is a schematic diagram of the process of the pipe peeling method according to an embodiment of the present application.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Peeling mechanism; 11. Second motor; 12. Conveyor belt; 13. Clamping cylinder; 14. Peeling knife; 15. Bearing seat; 16. Central rotating shaft; 2. Positioning mechanism; 21. Mandrel; 22. Positioning sleeve; 23. Pull rod; 24. Thrust ball bearing; 25. Deep groove ball bearing; 26. Second mounting bracket; 27. Linear cylinder; 3. Clamping mechanism; 31. Clamping tube; 32. Taper sleeve; 33. First motor; 34. Linear bearing; 35. First mounting bracket; 36. Movable bracket. DETAILED DESCRIPTION

[0025] The present application is further described in detail below in conjunction with the accompanying drawings.

[0026] like Figure 1 As shown, a pipe peeling device includes a peeling mechanism 1, a positioning mechanism 2 and a clamping mechanism 3. The positioning mechanism 2 is used to position the pipe to be cut, and the clamping mechanism 3 is used to clamp the pipe to be cut. The peeling mechanism 1 is used to peel the pipe to be cut after the pipe to be cut is positioned and clamped.

[0027] The pipe fitting can be a curved thin-walled pipe fitting, and the pipe fitting can be divided into a redundant straight line segment and a curved segment according to the cutting position of the pipe fitting.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, as an optional implementation of this embodiment, the clamping mechanism 3 may include a clamping tube 31, a cone sleeve 32 and a second drive assembly. The clamping tube 31 is sleeved on the outside of the pipe fitting. In this embodiment, the clamping tube 31 can be sleeved on the outside of the end of the redundant straight section away from the curved section. The second drive assembly is connected to the end of the clamping tube 31 away from the pipe fitting, and the cone sleeve 32 is arranged outside the clamping tube 31. The cone sleeve 32 can be fixed in the rotary cutting mechanism 1. The inner hole of the cone sleeve 32 can be gradually reduced in the direction close to the second drive assembly. The cone sleeve 32 abuts against the clamping tube 31. The second drive assembly is used to drive the clamping tube 31 to move axially, so that the cone sleeve 32 squeezes the clamping tube 31, and then clamps the pipe fitting through the clamping tube 31 to complete the clamping of the pipe fitting.

[0029] The second driving assembly may include a first mounting bracket 35, a first motor 33, a linear bearing 34 and a movable bracket 36. The first motor 33 is mounted on the first mounting bracket 35. The output end of the first motor 33 is connected to the linear bearing 34. The output end of the linear bearing 34 is connected to the movable bracket 36. The movable bracket 36 is connected to the end of the clamping tube 31 away from the pipe fitting. The inner hole of the tapered sleeve 32 may be gradually reduced in the direction close to the first motor 33.

[0030] The first motor 33 provides a tensioning force, and converts the rotation into a linear motion along the axis of the clamp tube 31 through the linear bearing 34. The linear bearing 34 drives the movable bracket 36 connected thereto to move, and the movable bracket 36 pulls the clamp tube 31 to move along the axis. Thus, the cone sleeve 32 squeezes the clamp tube 31, and the clamp tube 31 shrinks inward due to the squeezing, thereby achieving the purpose of clamping the pipe. In this embodiment, the first motor 33 can be a servo motor.

[0031] As another optional implementation of this embodiment, the clamping mechanism 3 may also include a spring-needle type profiling clamp, which is arranged at the bending section at the front end of the pipe fitting and is used to clamp the pipe fitting.

[0032] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment, the positioning mechanism 2 may include a core shaft 21, a positioning sleeve 22 and a first drive assembly. The core shaft 21 is located inside the pipe fitting, and the core shaft 21 can support the pipe fitting; the positioning sleeve 22 is located inside the clamp tube 31, and the end face of the positioning sleeve 22 in the length direction abuts against the end face of the pipe fitting close to the second motor 11, and the end face of the positioning sleeve 22 away from the pipe fitting is connected to the first drive assembly. The first drive assembly is used to drive the positioning sleeve 22 to move linearly along the axial direction, so as to maintain an abutment state with the pipe fitting and adjust the position of the pipe fitting in the clamp tube 31.

[0033] The first driving assembly may include a pull rod 23, a second mounting bracket 26 and a power piece, wherein the second mounting bracket 26 may be fixedly connected to the upper surface of the first mounting bracket 35, the power piece is mounted on the second mounting bracket 26, the telescopic end of the power piece is fixedly connected to the pull rod 23, and the end of the pull rod 23 away from the power piece is fixedly connected to the positioning sleeve 22. The power piece may be a linear cylinder 27 or a servo motor. It is easy to understand that when the power piece is a servo motor, a linear bearing 34 may be provided between the servo motor and the pull rod 23 to convert rotation into linear motion along the axial direction of the pull rod 23.

[0034] In this embodiment, the rear positioning of the pipe is realized by the linear cylinder 27 or the servo motor, and the position of the redundant straight section of the pipe is clamped by the first motor 33; for parts of the same pipe diameter, only the positioning point needs to be adjusted; the curved section can be auxiliary clamped, and there is no need to make a special profiling mold and frequently replace it, and there is no need to consider too much about the different sizes of the bent pipes or the errors of the parts, which greatly improves the versatility and convenience of the pipe peeling device. Therefore, the pipe peeling device can not only meet the requirements of more head-aligning sizes, but also increase the convenience and accuracy of positioning, which greatly improves the versatility of the pipe peeling device.

[0035] like Figure 1 and Figure 6 As shown, the rotary cutting mechanism 1 includes a rotary cutting blade 14. Figure 4 As shown, in this embodiment, the power member is a linear cylinder 27, and the linear cylinder 27 provides power in the positioning mechanism 2. According to the requirements of the flush length of different pipe fittings, the center of the rotary cutter 14 can be used as the origin, and the positioning sleeve 22 can be driven forward or backward through the pull rod 23 to meet the positioning requirements of different lengths. After the rotary cutting of the pipe fitting is completed, the positioning sleeve 22 can also be driven forward by the power member to push out the redundant straight line segment in the device.

[0036] like Figure 1 , Figure 3 and Figure 6 As shown, the peeling mechanism 1 also includes a second motor 11, a conveyor belt 12, a clamping cylinder 13, a bearing seat 15 and a central rotating shaft 16. The second motor 11 is used to provide rotational power and adjust the cutting speed. The central rotating shaft 16 is located inside the bearing seat 15. The second motor 11 can transmit power to the central rotating shaft 16 through the conveyor belt 12. The central rotating shaft 16 is connected to the clamping cylinder 13, and the central rotating shaft 16 is used to drive the clamping cylinder 13 to rotate. The clamping cylinder 13 includes a hollow pneumatic double-jaw chuck, and the clamping cylinder 13 is used to drive the peeling cutter 14 to move forward and backward along the radial direction of the clamping cylinder 13. In this embodiment, the second motor 11 can be a three-phase asynchronous motor.

[0037] The second motor 11 outputs a suitable speed and transmits it to the central rotating shaft 16 through the conveyor belt 12. The central rotating shaft 16 drives the clamping cylinder 13 to rotate. The clamping cylinder 13 itself can provide power to drive the rotary cutter 14 to advance in the centripetal direction, so that the blade of the rotary cutter 14 cuts into the pipe fitting to complete the pipe fitting end-to-end process. The rotary cutter 14 squeezes and peels the pipe fitting, which is different from the sawing and milling cutting mode, and realizes chip-free cutting, reducing the risk of contamination of the cleanliness of the inner cavity of the pipe fitting.

[0038] like Figure 6 and Figure 7 As shown, in this embodiment, the rotary cutter 14 can be a special disc-type rotary cutter 14, the blade of the rotary cutter 14 itself is not fixed axially, and the rotary cutter 14 can rotate. One side of the cutting edge of the rotary cutter 14 has a step of a certain thickness, which can not only increase the strength of the rotary cutter 14, but also continue to apply pressure to the pipe after the pipe is cut, and play a role in rounding the pipe mouth at the cut point of the pipe to a certain extent.

[0039] like Figure 3 , Figure 8 and Fig. 9 As shown, in this embodiment, the mandrel 21 includes a plurality of connection blocks, and the connection blocks are fixedly connected to the central rotating shaft 16, and the central rotating shaft 16 can drive the mandrel 21 to rotate synchronously. The clamp tube 31 may include a first part and a second part, the first part is a complete tubular structure, and the second part is a multi-petal tubular structure, and the number of petals of the second part corresponds to the number of connection blocks; the positioning sleeve 22 includes a third part and a fourth part, the third part is a complete tubular structure, and the fourth part is a multi-petal tubular structure, and the number of petals of the fourth part corresponds to the number of connection blocks. Exemplarily, the mandrel 21 may include three connection blocks, the second part is a three-petal structure, and the fourth part is also a three-petal structure.

[0040] The space formed by the petals in the second part corresponds to the space formed by the petals in the fourth part, and each connection block passes through the space formed by the petals in the fourth part and the space formed by the petals in the second part, and is fixedly connected to the central rotating shaft 16. Since the clamping tube 31 and the positioning sleeve 22 are required to rotate with the core shaft 21, a rotating assembly is also provided between the clamping tube 31 and the movable bracket 36, and the rotating assembly may include a thrust ball bearing 24 and a deep groove ball bearing 25.

[0041] The core shaft 21 may also include a cutter groove corresponding to the position of the rotary cutter 14. The cutter groove is located at the end of the core shaft 21 away from the connecting block. The cutter groove can be arranged circumferentially along the core shaft 21. When the pipe is cut off, the cutting edge of the rotary cutter 14 can enter the cutter groove.

[0042] During the rotary cutting process of the pipe fitting, the pipe fitting does not move. The rotary cutter 14 cooperates with the rotating core shaft 21 to make the blade of the rotary cutter 14 and the pipe fitting move relative to each other, which helps to reduce the squeezing force of the rotary cutter 14 on the pipe fitting and reduces the possibility of the pipe fitting's mouth being out of round. The bent thin-walled pipe fitting does not rotate, which can reduce the risk of interference and improve safety.

[0043] In this embodiment, the pipe peeling device has complete functions, and the actions of positioning, clamping, peeling, and ejecting excess material can be completed independently inside the device, and a control program can be added outside to realize automatic peeling. The pipe peeling device has a compact structure, which is convenient for arranging other devices around it and realizing functional expansion.

[0044] Based on the same technical concept, the embodiment of the present application also discloses a pipe peeling method using the above-mentioned pipe peeling device, comprising: Step S1: Based on the current pipe end length requirement, taking the center of the rotary cutter as the origin, the advance and retreat distance of the first drive assembly is calculated so that the first drive assembly drives the positioning sleeve to move linearly along the axial direction to achieve the purpose of pipe positioning.

[0045] The pipe peeling device includes a peeling mechanism, a positioning mechanism and a clamping mechanism. The positioning mechanism includes a positioning sleeve and a first driving assembly. The end face of the positioning sleeve in the length direction abuts against the end face of the excess straight section away from the curved section. The end face of the positioning sleeve away from the pipe is connected to the first driving assembly.

[0046] The peeling mechanism includes a peeling cutter, a second motor, a conveyor belt, a clamping cylinder, a bearing seat and a central rotating shaft. The blade of the peeling cutter itself is not fixed axially. The central rotating shaft is located inside the bearing seat. The second motor transmits power to the central rotating shaft through the conveyor belt. The central rotating shaft is connected to the clamping cylinder. The central rotating shaft is used to drive the clamping cylinder to rotate. The clamping cylinder is connected to the peeling cutter. The clamping cylinder drives the peeling cutter to move forward and backward along the radius of the clamping cylinder.

[0047] Step S2: If the positioning sleeve moves into place, the clamping mechanism is started to clamp the pipe.

[0048] In this embodiment, the clamping mechanism includes a clamping tube, a tapered sleeve and a second driving assembly for driving the clamping tube to move axially, the clamping tube sleeve is arranged on the outside of the pipe fitting, the second driving assembly is connected to the end of the clamping tube away from the pipe fitting, the tapered sleeve is arranged on the outside of the clamping tube, the tapered sleeve is fixed in the rotary cutting mechanism, the inner hole of the tapered sleeve gradually shrinks in the direction approaching the second driving assembly, and the tapered sleeve abuts against the clamping tube.

[0049] The clamping tube is tightened by the first motor, and the clamping tube is squeezed and retracted by the cone sleeve on the outer periphery to complete the wrapping and clamping of the pipe fitting.

[0050] Step S3: If the clamping mechanism completes clamping the pipe, the peeling mechanism is started, and the peeling mechanism rotates around the pipe to peel the pipe.

[0051] The rotary cutting mechanism is started, and the rotary cutting head rotates around the bent pipe through the power of the second motor. At the same time, the rotary cutting knife gradually cuts into the pipe through the action of the clamping cylinder, and finally completes the cutting purpose.

[0052] If the peeling mechanism completes peeling of the pipe, the peeling mechanism is controlled to continue to apply pressure to the pipe.

[0053] The blade of the rotary cutter has a step on one side. After the pipe is cut, the rotary cutter mechanism continues to apply pressure, which can play a role in rounding the pipe mouth of the pipe to a certain extent.

[0054] If the rotary cutting mechanism completes the rounding of the pipe fitting, the first driving assembly is started, and the advance and retreat distance of the first driving assembly is readjusted so that the positioning sleeve pushes out the remaining material after cutting.

[0055] The terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0058] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A pipe peeling device, characterized in that: It comprises a rotary cutting mechanism (1), a positioning mechanism (2) for positioning a pipe fitting, and a clamping mechanism (3) for clamping the pipe fitting, wherein the pipe fitting comprises redundant straight sections and curved sections; The positioning mechanism (2) comprises a positioning sleeve (22) and a first driving assembly for driving the positioning sleeve (22) to perform linear motion along the axial direction, the end face of the positioning sleeve (22) in the length direction abuts against the end face of the excess straight section away from the curved section, and the end face of the positioning sleeve (22) away from the pipe is connected to the first driving assembly.

2. A pipe peeling device according to claim 1, characterized in that: The clamping mechanism (3) comprises a clamping tube (31), a cone sleeve (32) and a second driving assembly for driving the clamping tube (31) to move axially; the clamping tube (31) is sleeved on the outside of the pipe fitting; the second driving assembly is connected to the end of the clamping tube (31) away from the pipe fitting; the cone sleeve (32) is arranged on the outside of the clamping tube (31); the cone sleeve (32) is fixed in the rotary cutting mechanism (1); the inner hole of the cone sleeve (32) gradually decreases in a direction approaching the second driving assembly; the cone sleeve (32) abuts against the clamping tube (31).

3. A pipe peeling device according to claim 2, characterized in that: The second driving assembly comprises a first mounting bracket (35), a first motor (33), a linear bearing (34) and a movable bracket (36); the first motor (33) is mounted on the first mounting bracket (35); the output end of the first motor (33) is connected to the linear bearing (34); the output end of the linear bearing (34) is connected to the movable bracket (36); and the movable bracket (36) is connected to the end of the clamping tube (31) away from the pipe fitting.

4. A pipe peeling device according to claim 3, characterized in that: The first driving assembly comprises a pull rod (23), a second mounting bracket (26) and a power piece, wherein the second mounting bracket (26) is fixedly connected to the upper surface of the first mounting bracket (35), the power piece is mounted on the second mounting bracket (26), the telescopic end of the power piece is fixedly connected to the pull rod (23), and the end of the pull rod (23) away from the power piece is fixedly connected to the positioning sleeve (22).

5. The pipe peeling device according to claim 3, characterized in that: The positioning mechanism (2) further comprises a core shaft (21) for supporting the pipe, and the core shaft (21) is located inside the pipe.

6. The pipe peeling device according to claim 5, characterized in that: The rotary cutting mechanism (1) comprises a rotary cutter (14), a second motor (11), a conveyor belt (12), a clamping cylinder (13), a bearing seat (15) and a central rotating shaft (16); the blade of the rotary cutter (14) is not fixed in the axial direction; the central rotating shaft (16) is located inside the bearing seat (15); the second motor (11) transmits power to the central rotating shaft (16) through the conveyor belt (12); the central rotating shaft (16) is connected to the clamping cylinder (13); the central rotating shaft (16) is used to drive the clamping cylinder (13) to rotate; the clamping cylinder (13) is connected to the rotary cutter (14); the clamping cylinder (13) drives the rotary cutter (14) to move forward and backward along the radial direction of the clamping cylinder (13).

7. A pipe peeling device according to claim 6, characterized in that: The core shaft (21) includes a plurality of connecting blocks, the clamping tube (31) includes a first part of a complete tubular structure and a second part of a multi-petal tubular structure, the number of petals of the second part corresponds to the number of the connecting blocks, the positioning sleeve (22) includes a third part of a complete tubular structure and a fourth part of a multi-petal tubular structure, the number of petals of the fourth part corresponds to the number of the connecting blocks; each of the connecting blocks passes through the space formed by the petals in the fourth part and the space formed by the petals in the second part, and is fixedly connected to the central rotating shaft (16); a rotating assembly is provided between the clamping tube (31) and the movable bracket (36).

8. A pipe peeling device according to claim 7, characterized in that: One side of the cutting edge of the rotary cutter (14) is provided with a step.

9. A pipe peeling device according to claim 8, characterized in that: The core shaft (21) comprises a cutting knife groove corresponding to the position of the rotary cutter (14), the cutting knife groove is located at the end of the core shaft (21) away from the connecting block, and the cutting knife groove is arranged along the circumference of the core shaft (21).

10. A method for peeling a pipe using the pipe peeling device according to any one of claims 1 to 9, characterized in that: include: Step S1: Based on the current pipe end length requirement, the advance and retreat distance of the first driving component is calculated with the center of the rotary cutter as the origin, so that the first driving component drives the positioning sleeve to move linearly along the axial direction to achieve the purpose of pipe positioning; Step S2: if the positioning sleeve moves into place, the clamping mechanism is started to clamp the pipe fitting; Step S3: If the clamping mechanism completes clamping the pipe, the peeling mechanism is started, and the peeling mechanism rotates around the pipe to peel the pipe.

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