Pipe positioning mechanism and pipe processing equipment comprising same

Abstract

The utility model relates to the technical field of pipe processing, and discloses a pipe positioning mechanism and pipe processing equipment comprising the same. A pipe positioning mechanism comprises a rack, a material supporting structure and at least two positioning devices, wherein the material supporting structure and the positioning devices are arranged on the rack, and the positioning devices are oppositely arranged. The material supporting structure is located between the two positioning devices, each positioning device comprises a first positioning driving device and a positioning frame which are in transmission connection, the first positioning driving devices can drive the positioning frames to be close to or away from the material supporting structure, and the positioning frames are provided with second positioning driving devices and positioning assemblies which are in transmission connection. The positioning assembly comprises a first positioning piece and a second positioning piece which are oppositely arranged in the horizontal direction, and the second positioning driving device can drive the first positioning piece and the second positioning piece to be close to each other; and a pipe end part bearing structure is arranged on the first positioning piece and / or the second positioning piece. The device has the beneficial effects that the falling degree of the ends of the pipes is limited, excessive deformation of the pipes is prevented, and the pipe machining precision is improved during follow-up pipe machining.

Description

Technical Field

[0001] This utility model relates to the field of pipe processing technology, and in particular to a pipe positioning mechanism and a pipe processing equipment including the positioning mechanism. Background Technology

[0002] A pipe processing device is available for drilling holes in pipes. The device includes a pipe positioning mechanism, which comprises a material support structure and an end positioning device. The end positioning device includes a positioning drive and an end limiting structure. The end limiting structure includes a limiting rod with a limiting groove, the opening of which faces downwards. During positioning, the positioning drive moves the end limiting structure toward the pipe, and the limiting rod moves downwards, fitting onto the pipe to prevent lateral swaying. Finally, the end drilling device drills holes on the lower side of the pipe end.

[0003] However, in the above structure, the limiting rod does not limit the lower side of the tube end. If the tube is relatively long, the tube end will sag significantly due to gravity, which may affect the processing accuracy. Utility Model Content

[0004] The main purpose of this utility model is to propose a positioning mechanism for pipes, which aims to solve the technical problem that the end of the pipe is prone to sagging, resulting in low processing accuracy in the prior art.

[0005] To achieve the above objectives, this utility model proposes a pipe positioning mechanism, including a frame, a material support structure mounted on the frame, and at least two opposing positioning devices. The material support structure is located between the two positioning devices and is used to support the pipe. The positioning devices include a first positioning drive device and a positioning frame that are connected by transmission. The first positioning drive device can drive the positioning frame to move closer to or away from the material support structure. The positioning frame is provided with a second positioning drive device and a positioning assembly that are connected by transmission. The positioning assembly includes a first positioning member and a second positioning member that are arranged opposite each other in the horizontal direction. The second positioning drive device can drive the first positioning member and the second positioning member to move closer to each other to clamp the end of the pipe on the material support structure. The first positioning member and / or the second positioning member are provided with a pipe end support structure to restrict the downward movement of the pipe end.

[0006] The beneficial effects of this invention are as follows: During pipe positioning, two positioning devices operate. The first positioning drive device moves the positioning frame closer to the pipe, positioning the first and second positioning components on opposite sides of the pipe. Then, the second positioning drive device moves the first and second positioning components closer together. During this process, the pipe end support structure moves to the lower side of the pipe end and supports the pipe, thus limiting the downward movement of the pipe end. The positioning mechanism in this invention can limit the degree of sag of the pipe end, prevent excessive deformation of the pipe, and improve the pipe processing accuracy during subsequent processing.

[0007] Preferably, the first positioning element is fixedly mounted on the positioning frame, and the second positioning drive device is connected to the second positioning element in a transmission manner. The second positioning drive device can drive the second positioning element to move closer to or away from the first positioning element, which is beneficial to improving the positioning accuracy of the pipe and making the processing quality of each pipe in the mass production of the pipe at a relatively average high level.

[0008] Preferably, the second positioning member is provided with a pipe end support structure, which includes multiple support strips arranged along the arrangement direction of the two positioning devices. The support strips are cylindrical and their axes extend along the arrangement direction of the first and second positioning members. The support strips are rotatably connected to the side of the second positioning member close to the first positioning member, which helps to reduce wear on the pipe and protect the pipe.

[0009] Preferably, a guide frustum is provided at one end of the support strip near the first positioning member. The guide frustum is coaxially arranged with the support strip. The circumferential side of the guide frustum can guide the end of the pipe to move onto the support strip, which is beneficial for correcting the downward deformation of both ends of long pipes and expands the applicability of the positioning mechanism.

[0010] Preferably, the positioning frame is also provided with an axial positioning plate. The axial positioning plate on the positioning device is located on the side of the positioning component away from the other positioning device. The axial positioning plate and the positioning component are spaced apart. During positioning, after the axial positioning plates on the two positioning devices perform axial positioning of the pipe, the positioning component clamps the pipe, which helps to improve the accuracy and efficiency of the axial positioning of the pipe.

[0011] Preferably, the output shaft of the first positioning drive device is connected to a transmission rod, and a connecting plate is provided on the positioning frame. The connecting plate has a transmission mounting hole, and the transmission rod passes through the transmission mounting hole. Both ends of the transmission rod are provided with limiting plates. The limiting plate located at the end of the transmission rod closer to the first positioning drive device is called the first limiting plate, and the limiting plate located at the end of the transmission rod away from the first positioning drive device is called the second limiting plate. Adjusting springs are provided between the first limiting plate and the connecting plate, and between the second limiting plate and the connecting plate. The adjusting springs are sleeved on the transmission rod, which helps to expand the applicability of the positioning mechanism.

[0012] This utility model also provides a pipe processing equipment, including the above-mentioned pipe positioning mechanism.

[0013] Preferably, the pipe processing equipment further includes a feeding device, which includes a feeding rack and a conveyor belt, a conveyor drive device, and a lifting device mounted on the feeding rack. The lifting device corresponds to the positions of the two positioning devices. The lifting device includes a lifting drive device and a lifting frame that are connected by a transmission. The lifting frame is provided with at least two clamping devices. The arrangement direction of the two clamping devices is the same as that of the two positioning devices, and the two clamping devices are spaced apart. The clamping device includes a clamping drive device, a clamping seat, and two clamping parts that are slidably connected to the clamping seat. The clamping drive device can drive the two clamping parts to move closer or further away synchronously. The upper end of the clamping part protrudes from the clamping seat. The material support structure includes a clamping seat, which helps to reduce equipment costs and improve production efficiency.

[0014] Preferably, the pipe processing equipment further includes an end hole processing device, which is mounted on the positioning frame and located below the positioning component. When the positioning component clamps the end of the pipe, the end hole processing device processes a hole on the lower side of the end of the pipe. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the pipe processing equipment in an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the positioning device and the end hole processing device in the embodiments of this utility model;

[0018] Figure 3 for Figure 2 A magnified view of a section at point B in the middle;

[0019] Figure 4 This is a schematic diagram of the structure of the first positioning member and the second positioning member clamping the P-shaped tube in an embodiment of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the second positioning member in an embodiment of this utility model;

[0021] Figure 6 This is a schematic diagram of the pipe processing equipment from another angle in an embodiment of this utility model;

[0022] Figure 7 for Figure 6 A magnified view of a section at point A in the middle;

[0023] Figure 8 This is a schematic diagram of the conveyor belt and placement trough in an embodiment of the present invention.

[0024] In the attached diagram: 1-Frame, 2-Positioning device, 21-First positioning drive device, 211-Transmission rod, 212-First limiting plate, 213-Second limiting plate, 22-Positioning frame, 221-Connecting plate, 222-Axial positioning plate, 23-Second positioning drive device, 24-Positioning assembly, 241-First positioning component, 2411-First upper clamp, 2412-First lower clamp, 242-Second positioning component, 2421-Second upper clamp, 2422-Second lower clamp, 25-Pipe end support structure, 251 - Supporting strip, 252- Guide round platform, 26- Adjusting spring, 3- Material support structure, 4- Lifting device, 41- Lifting drive device, 42- Lifting frame, 431- Clamping seat, 432- Clamping piece, 10- Feeding device, 101- Feeding rack, 102- Conveying drive device, 103- Conveyor belt, 1031- Placement groove, 20- End hole processing device, 201- Drilling machine, 202- Hole structure drive motor, 203- Hole processing lifting cylinder, 30- P-shaped tube, 301- Convex strip, 302- Square tube section.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators, such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] like Figures 1 to 8 As shown, a pipe positioning mechanism includes a frame 1, a material support structure 3 mounted on the frame 1, and at least two opposing positioning devices 2. The material support structure 3 is located between the two positioning devices 2 and is used to support the pipe. The positioning device 2 includes a first positioning drive device 21 and a positioning frame 22 connected by transmission. The first positioning drive device 21 can drive the positioning frame 22 to move closer to or away from the material support structure 3. The positioning frame 22 is provided with a second positioning drive device 23 and a positioning assembly 24 connected by transmission. The positioning assembly 24 includes a first positioning member 241 and a second positioning member 242 arranged opposite to each other in the horizontal direction. The second positioning drive device 23 can drive the first positioning member 241 and the second positioning member 242 to move closer to each other to clamp the end of the pipe on the material support structure 3. The first positioning member 241 and / or the second positioning member 242 are provided with a pipe end support structure 25 to restrict the downward movement of the pipe end.

[0030] During pipe positioning, two positioning devices 2 operate. The first positioning drive device 21 drives the positioning frame 22 closer to the pipe, so that the first positioning element 241 and the second positioning element 242 are located on both sides of the pipe. Then, the second positioning drive device 23 drives the first positioning element 241 and the second positioning element 242 closer to each other. During this process, the pipe end support structure 25 moves to the lower side of the pipe end and supports the pipe, thereby limiting the downward movement of the pipe end. The positioning mechanism in this embodiment can limit the degree of sag of the pipe end, prevent excessive deformation of the pipe, and improve the pipe processing accuracy during subsequent pipe processing.

[0031] Furthermore, the frame 1 is provided with a guide rail, and a support is slidably connected to the guide rail. The positioning device 2 is provided on the support. The support is also provided with a sliding locking structure to fix the support on the guide rail.

[0032] In some specific embodiments, reference is made to Figure 1 Both the first positioning drive device 21 and the second positioning drive device 23 adopt a cylinder structure.

[0033] In other embodiments, the first positioning drive device 21 and the second positioning drive device 23 may also adopt a hydraulic cylinder structure, a motor + worm gear drive structure, etc.

[0034] In some specific embodiments, reference is made to Figures 1 to 3 The first positioning element 241 is fixedly mounted on the positioning frame 22, and the second positioning drive device 23 is connected to the second positioning element 242 in a transmission manner. The second positioning drive device 23 can drive the second positioning element 242 to move closer to or away from the first positioning element 241.

[0035] In this embodiment, the first positioning element 241 is fixedly mounted on the positioning frame 22, and the second positioning element 242 can move closer to or further away from the first positioning element 241. This allows the pipe to use the first positioning element 241 as a positioning standard during positioning, and the second positioning element 242 to push and press the pipe into the position of the first positioning element 241 for positioning. This arrangement helps improve the positioning accuracy of the pipe, ensuring that the positioning position of each pipe is basically the same, and resulting in a relatively average high level of processing quality for each pipe in mass production.

[0036] Furthermore, the positioning component 24 has a guide at one end near the material support structure 3, and the guide has a guiding slope. In some cases, the pipe to be processed may be deformed, causing the end of the pipe to bend to the left or right, or to tilt upwards, or to drop downwards. In this embodiment, multiple guides are provided on the positioning component 24, and the space between the first positioning member 241 and the second positioning member 242 is called the positioning channel. The multiple guides are located on the periphery of the positioning channel near the opening of the material support structure 3, guiding the end of the pipe smoothly into the positioning channel.

[0037] Furthermore, rollers are provided on the side of the first positioning member 241 near the second positioning member 242 and on the side of the second positioning member 242 near the first positioning member 241, in order to reduce the friction between the pipe and the first positioning member 241 and the second positioning member 242 when the pipe moves axially, so as to protect the pipe.

[0038] In some specific embodiments, reference is made to Figure 4 and Figure 5 The second positioning member 242 is provided with a pipe end support structure 25. The pipe end support structure 25 includes a plurality of support strips 251 arranged along the arrangement direction of the two positioning devices 2. The support strips 251 are cylindrical and their axes extend along the arrangement direction of the first positioning member 241 and the second positioning member 242. The support strips 251 are rotatably connected to the side of the second positioning member 242 near the first positioning member 241.

[0039] The support strip 251 is cylindrical. If the lower side of the pipe end is slightly lower than the uppermost side of the support strip 251 before the pipe end is positioned, the outer circumferential surface of the cylindrical support strip 251 can guide the pipe end to move upward, so that the pipe end is supported on the support strip 251.

[0040] The support strip 251 is rotatably connected to the second positioning member 242, which can reduce the wear caused to the pipe by the support strip 251 when the pipe moves axially on the support strip 251, and is beneficial to protect the pipe.

[0041] In some other embodiments, the positioning component 24 needs to clamp the P-shaped tube 30. The first positioning member 241 includes a first upper clamping portion 2411 and a first lower clamping portion 2412 arranged in the vertical direction, and the second positioning member 242 includes a second upper clamping portion 2421 and a second lower clamping portion 2422 arranged in the vertical direction. The first upper clamping portion 2411 and the second upper clamping portion 2421 are used to clamp and position the protrusion 301 of the P-shaped tube 30, and the first lower clamping portion 2412 and the second lower clamping portion are used to clamp and position the square tube portion 302 of the P-shaped tube 30.

[0042] In some specific embodiments, reference is made to Figure 4 and Figure 5 The support strip 251 has a guide platform 252 at one end near the first positioning member 241. The guide platform 252 is coaxially arranged with the support strip 251. The peripheral side of the guide platform 252 can guide the end of the pipe to move onto the support strip 251.

[0043] For longer pipes, when supported on the support structure 3, both ends exhibit a noticeable downward sag. In this case, when the second positioning drive device 23 moves the second positioning member 242 closer to the first positioning member 241, the peripheral side of the guide frustum 252 can guide the pipe to move onto the support strip 251. The guide frustum 252 helps correct the downward deformation at both ends of longer pipes, expanding the applicability of the positioning mechanism in this embodiment.

[0044] In some other embodiments, the pipe end support structure 25 is slidably connected to the second positioning member 242 and is provided with a corresponding locking structure to fix the pipe end support structure 25 to the second positioning member 242. As long as the pipe end can be supported and the downward movement of the pipe end is restricted, it is acceptable.

[0045] In some specific embodiments, the positioning frame 22 is also provided with an axial positioning plate 222. The axial positioning plate 222 on the positioning device 2 is located on the side of the positioning component 24 away from the other positioning device 2. The axial positioning plate 222 and the positioning component 24 are spaced apart. During positioning, after the axial positioning plates 222 on the two positioning devices 2 perform axial positioning on the pipe, the positioning component 24 clamps the pipe.

[0046] During positioning, the first positioning drive device 21 drives the positioning frame 22 to move, so that both ends of the pipe abut against the axial positioning plates 222 of the two positioning devices 2 respectively. Then, the second positioning drive device 23 drives the second positioning member 242 to approach the first positioning member 241 to clamp the ends of the pipe. The axial positioning plates 222 are designed to improve the accuracy and efficiency of axial positioning of the pipe, and to improve the accuracy and efficiency of pipe processing.

[0047] In some specific embodiments, reference is made to Figure 2 and Figure 3 The output shaft of the first positioning drive device 21 is connected to a transmission rod 211. The positioning frame 22 is provided with a connecting plate 221, and the connecting plate 221 is provided with a transmission mounting hole. The transmission rod 211 passes through the transmission mounting hole. Both ends of the transmission rod 211 are provided with limiting plates. The limiting plate provided at the end of the transmission rod 211 closer to the first positioning drive device 21 is called the first limiting plate 212, and the limiting plate provided at the end of the transmission rod 211 away from the first positioning drive device 21 is called the second limiting plate 213. Adjusting springs 26 are provided between the first limiting plate 212 and the connecting plate 221, and between the second limiting plate 213 and the connecting plate 221. The adjusting springs 26 are sleeved on the transmission rod 211.

[0048] Because of potential processing errors in the pipes, the lengths of individual pipes may vary. By installing an adjusting spring 26 on the transmission rod 211, the positioning mechanism in this embodiment can effectively position the pipe axially even when the pipe length differs from the set length, thus expanding the applicability of the positioning mechanism.

[0049] This embodiment also provides a pipe processing equipment, see reference. Figure 1 , Figure 6 and Figure 7 This includes the positioning mechanism for the aforementioned pipes.

[0050] In some specific embodiments, reference is made to Figure 1 , Figure 2 , Figures 6 to 8The pipe processing equipment also includes a feeding device 10, which includes a feeding rack 101 and a conveyor belt 103, a conveyor drive device 102, and a lifting device 4 mounted on the feeding rack 101. The lifting device 4 corresponds to the positions of the two positioning devices 2. The lifting device 4 includes a lifting drive device 41 and a lifting frame 42 connected by transmission. The lifting frame 42 is provided with at least two clamping devices. The arrangement direction of the two clamping devices is the same as the arrangement direction of the two positioning devices 2. The two clamping devices are arranged at intervals. The clamping device includes a clamping drive device, a clamping seat 431, and two clamping parts 432 slidably connected to the clamping seat 431. The clamping drive device can drive the two clamping parts 432 to move closer or further away synchronously. The upper end of the clamping part 432 protrudes from the clamping seat 431. The material support structure 3 includes the clamping seat 431.

[0051] The conveying drive device 102 drives the conveyor belt 103 to transport the pipes on the conveyor belt 103 to the upper side of the lifting device 4. Then, the lifting drive device 41 drives the lifting frame 42 to rise, causing the lifting seat to lift the pipes on the conveyor belt 103. After this, the clamping drive device drives the two clamping members 432 to move closer synchronously to clamp the pipes. Finally, the lifting drive device 41 continues to drive the lifting frame 42 until the pipes rise to the height corresponding to the positioning device 2.

[0052] In this embodiment, the lifting device 4, with its two spaced-apart clamping devices, allows for the stable upward transport of pipes—even long ones—using only one set of lifting device 4. This design helps reduce equipment costs and improve production efficiency.

[0053] In this embodiment, the clamping member 432 and the positioning component 24 can also cooperate with each other to transfer the pipe from the clamping device to the positioning device 2. When the second positioning drive device 23 drives the second positioning member 242 to push the pipe towards the first positioning member 241, the two clamping members 432 on the clamping device move away from each other. During this process, one of the clamping members 432 will work with the second positioning member 242 to temporarily clamp the pipe to prevent it from falling off, until the second positioning member 242 clamps the pipe onto the first positioning member 241.

[0054] Specifically, the lifting drive device 41 can adopt a gear and rack motion module, a lead screw motion module, etc. The clamping drive device can adopt a cylinder structure, a hydraulic cylinder structure, a gear and rack motion module, etc.

[0055] Further, refer to Figure 8The conveyor belt 103 has evenly arranged placement grooves 1031, with the openings of the placement grooves 1031 facing upwards. The shape of the interior of the placement grooves 1031 matches the shape of the square tube portion 302 of the P-shaped tube 30. During conveying, the P-shaped tube 30 is placed in the placement grooves 1031 for conveying, which can effectively restrict the movement of the P-shaped tube 30, thereby improving the accuracy of feeding and the precision of tube processing.

[0056] Preferably, refer to Figure 2 The pipe processing equipment also includes an end hole processing device 20, which is mounted on the positioning frame 22 and located below the positioning component 24. When the positioning component 24 clamps the end of the pipe, the end hole processing device 20 processes holes on the lower side of the end of the pipe.

[0057] Specifically, the end hole processing device 20 includes a hole processing lifting cylinder 203 and a hole structure drive motor 202 connected by transmission, and a drilling machine 201 mounted on the hole structure drive motor 202. The end of the piston rod of the hole processing lifting cylinder 203 is fixed to the lower side of the positioning frame 22, and the hole structure drive motor 202 is fixed to the cylinder body of the hole processing lifting cylinder 203.

[0058] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A pipe positioning mechanism, characterized by: It includes a frame (1), a material support structure (3) disposed on the frame (1), and at least two opposing positioning devices (2); The material support structure (3) is located between the two positioning devices (2) and is used to support the material. The positioning device (2) includes a first positioning drive device (21) and a positioning frame (22) connected by transmission. The first positioning drive device (21) can drive the positioning frame (22) to move closer to or away from the material support structure (3). The positioning frame (22) is provided with a second positioning drive device (23) and a positioning assembly (24) connected by transmission. The positioning assembly (24) includes a first positioning element (241) and a second positioning element (242) arranged opposite to each other in the horizontal direction. The second positioning drive device (23) can drive the first positioning element (241) and the second positioning element (242) to move closer to each other to clamp the end of the pipe on the material support structure (3). The first positioning member (241) and / or the second positioning member (242) are provided with a pipe end support structure (25) to restrict the downward movement of the pipe end.

2. The tube positioning mechanism of claim 1, wherein: The first positioning element (241) is fixedly mounted on the positioning frame (22), and the second positioning drive device (23) is connected to the second positioning element (242) in a transmission manner. The second positioning drive device (23) can drive the second positioning element (242) to move closer to or further away from the first positioning element (241).

3. A tube positioning mechanism according to claim 2, wherein: The second positioning member (242) is provided with the pipe end support structure (25), the pipe end support structure (25) includes a plurality of support strips (251) arranged along the arrangement direction of the two positioning devices (2), the support strips (251) are cylindrical and their axes extend along the arrangement direction of the first positioning member (241) and the second positioning member (242), and the support strips (251) are rotatably connected to the side of the second positioning member (242) near the first positioning member (241).

4. A tube positioning mechanism according to claim 3, wherein: The support strip (251) has a guide frustum (252) at one end near the first positioning member (241). The guide frustum (252) is coaxially arranged with the support strip (251). The peripheral side of the guide frustum (252) can guide the end of the pipe to move onto the support strip (251).

5. The tube positioning mechanism of claim 1, wherein: The positioning frame (22) is also provided with an axial positioning plate (222). The axial positioning plate (222) on the positioning device (2) is located on the side of the positioning component (24) away from the other positioning device (2). The axial positioning plate (222) and the positioning component (24) are spaced apart. During positioning, after the axial positioning plates (222) on the two positioning devices (2) perform axial positioning on the pipe, the positioning component (24) clamps the pipe.

6. The tube positioning mechanism of claim 1, wherein: The output shaft of the first positioning drive device (21) is connected to a transmission rod (211). The positioning frame (22) is provided with a connecting plate (221). The connecting plate (221) is provided with a transmission mounting hole. The transmission rod (211) passes through the transmission mounting hole. Both ends of the transmission rod (211) are provided with limiting plates. The limiting plate located at the end of the transmission rod (211) closer to the first positioning drive device (21) is called the first limiting plate (212). The limiting plate located at the end of the transmission rod (211) away from the first positioning drive device (21) is called the second limiting plate (213). Adjusting springs (26) are provided between the first limiting plate (212) and the connecting plate (221) and between the second limiting plate (213) and the connecting plate (221). The adjusting springs (26) are sleeved on the transmission rod (211).

7. A pipe machining apparatus characterized by comprising: The positioning mechanism for the pipe as described in any one of claims 1 to 6.

8. The pipe machining apparatus of claim 7, wherein: It also includes a feeding device (10), which includes a feeding rack (101) and a conveyor belt (103), a conveyor drive device (102) and a lifting device (4) on the feeding rack (101). The lifting device (4) is located at one end of the feeding rack (101) and the lifting device (4) corresponds to the positions of the two positioning devices (2). The lifting device (4) includes a lifting drive device (41) and a lifting frame (42) connected by transmission. The lifting frame (42) is provided with at least two clamping devices. The arrangement direction of the two clamping devices is the same as the arrangement direction of the two positioning devices (2). The two clamping devices are arranged at intervals. The clamping device includes a clamping drive device, a clamping seat (431), and two clamping members (432) slidably connected to the clamping seat (431). The clamping drive device can drive the two clamping members (432) to move closer or further away synchronously. The upper end of the clamping member (432) protrudes from the clamping seat (431). The material support structure (3) includes the clamping seat (431).

9. The pipe machining apparatus of claim 7 or 8, wherein: It also includes an end hole processing device (20), which is disposed on the positioning frame (22) and located below the positioning component (24). When the positioning component (24) clamps the end of the pipe, the end hole processing device (20) processes a hole on the lower side of the end of the pipe.

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