A pipe welding beveling machine with an automatic positioning function

Abstract

The present invention relates to the technical field of mechanical cutting, and specifically relates to a pipe welding beveling machine with an automatic positioning function, which includes a frame and a driving frame. A plurality of support arms are arranged between the driving frame and the frame. One end of the driving frame far from the frame is provided with a cutting assembly; by moving the driving frame along the axial direction of the pipe, the plurality of support arms are synchronously driven to expand radially along the pipe. After the plurality of support arms are in contact with the inner wall of the pipe, the frictional force generated by the multi-point contact cancels the cantilever load of the cutting assembly at the pipe port, so that the center of gravity of the beveling machine is stabilized inside the pipe. As the driving frame continues to move, the supporting force of the support arms on the pipe gradually increases, thereby compensating for the cutting force and vibration and improving the processing stability. Different from traditional beveling machines that rely on external fixtures or hoisting for fixation, this device can achieve automatic fixation by using a support arm structure with multi-point contact, is suitable for operation in narrow spaces, and improves the construction convenience.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical cutting, and particularly to a pipe welding beveling machine with an automatic positioning function. Background Art

[0002] In industrial production, the mechanical cutting of the end face of steel pipes mainly adopts two structures: external clamping type and internal bracing type. The external clamping type means that the equipment cuts by clamping the outer wall of the steel pipe. Its structure is simple and lightweight, and it is widely used. However, in some restricted spaces, due to insufficient external space of the steel pipe, it is difficult to install the external clamping type equipment. At this time, the internal bracing type cutting machine becomes a more ideal choice.

[0003] However, traditional internal bracing type steel pipe cutting machines generally have the problems of complex structure and heavy weight. Their weight often reaches several tons, which not only affects the convenience of on-site operations but also increases the difficulty of equipment handling and installation. In addition, due to the large resistance and vibration during the mechanical cutting process, both external clamping type and internal bracing type equipment need to ensure that they can firmly clamp the steel pipe to maintain the stability and cutting accuracy of the processing process.

[0004] Chinese Patent Application Publication No. CN119260026A discloses a steel pipe end face cutting machine, which includes a base, a rotating arm and an internal bracing driving device. It adopts a sleeve internal bracing structure to automatically center the equipment inside the pipeline, thereby reducing clamping eccentricity and improving the stability and accuracy of cutting. At the same time, the equipment moves on the inner wall of the steel pipe through a roller device, which improves the construction convenience. Although the design of this patent optimizes the automation performance of the internal bracing mechanism to a certain extent, there are still some deficiencies. For example, its driving device is mainly located outside the pipeline, resulting in the center of gravity of the equipment being biased outside. In actual use, it needs to rely on external suspension ropes or auxiliary equipment for fixation to ensure stability during the processing process. In addition, during the actual construction process, with the processing feed, when the tool head contacts the pipeline material, a large vibration will occur. At this time, the internal bracing mechanism of the equipment needs to provide stronger support force to prevent the cutting accuracy from decreasing or the equipment from shifting. Summary of the Invention

[0005] In view of the above problems, a pipe welding beveling machine with an automatic positioning function is provided. The present invention moves the driving frame along the axial direction of the pipeline, synchronously drives a plurality of support arms to expand radially along the pipeline. After the plurality of support arms are in contact with the inner wall of the pipeline, the frictional force generated by the multi-point contact offsets the cantilever load of the cutting assembly at the pipeline port, so that the center of gravity of the beveling machine is stable inside the pipeline. As the driving frame continues to move, the support force of the support arms on the pipeline gradually increases, thereby compensating for the cutting force and vibration and improving the processing stability. Avoiding the traditional beveling machine relying on external fixtures or hoisting for fixation, this device can achieve automatic fixation by using the support arm structure with multi-point contact, is suitable for operation in narrow spaces, and improves the construction convenience.

[0006] To solve the problems of the existing technology, the present invention provides a pipe welding beveling machine with an automatic positioning function, which includes a frame. A driving frame that can slide along the axial direction of the pipe is arranged on the frame. A plurality of support arms evenly distributed around the axis of the pipe are arranged between the driving frame and the frame. The plurality of support arms can expand and contract synchronously along the radial direction of the pipe; a cutting component that can rotate around the axis of the pipe is arranged at one end of the driving frame away from the frame; when the driving frame moves along the axial direction of the pipe, the driving frame can synchronously drive the plurality of support arms to expand along the radial direction of the pipe until the support arms are in contact with the inner wall of the pipe. The multi-point contact between the support arms and the pipe offsets the cantilever load of the cutting component at the pipe port, realizing the automatic balance positioning of the beveling machine; after the support arms are in contact with the inner wall of the pipe, the cutting component rotates around the axis of the pipe, and at the same time, the cutting component is driven to feed towards the pipe port by further movement of the driving frame.

[0007] Preferably, a first lead screw that can extend along the axial direction of the pipe is arranged on the frame. The driving frame is sleeved on the first lead screw and is in threaded cooperation with it. A plurality of first guide rods distributed around the axis of the first lead screw are arranged on the driving frame. The plurality of first guide rods all extend towards the frame direction, and the first guide rods are in sliding cooperation with the frame.

[0008] Preferably, the support arm includes a contact plate, a connecting rod, and two support rods. Two support rods hinged to the frame are arranged on the frame. The two support rods are parallel to each other. The contact plate is hinged to the other ends of the two support rods, and the contact plate is parallel to the axis of the pipe. The two ends of the connecting rod are respectively connected to the driving frame and the middle part of one of the support rods.

[0009] Preferably, chutes with the same number as and corresponding to the support arms one by one are arranged on the driving frame. The chutes extend along the axial direction of the pipe. A pulley in sliding cooperation with the chute is arranged at the end of the connecting rod. An elastic member that can push the pulley towards the frame side is arranged on the driving frame.

[0010] Preferably, mounting brackets with the same number as and corresponding to the support arms one by one are arranged on the frame. The two support rods are hinged to the mounting brackets on the frame. An installation ring for connecting the plurality of mounting brackets is also arranged on the frame. An avoidance groove for avoiding the support rods is arranged on the installation ring.

[0011] Preferably, an installation disc is arranged between the cutting component and the driving frame. The cutting component is rotatably arranged on the installation disc. A second lead screw and a second guide rod that can extend along the axial direction of the pipe are arranged on the installation disc. The driving frame is sleeved on the second lead screw and the second guide rod. The driving frame is in threaded cooperation with the second lead screw and in sliding cooperation with the second guide rod.

[0012] Preferably, a transmission shaft capable of driving the mounting disc to rotate is provided on the driving frame. The transmission shaft is of a telescopic structure. A gear is provided at the end of the transmission shaft, and a gear ring engaged with the gear is provided on the cutting assembly. A second rotary drive motor for driving the transmission shaft is provided on the driving frame.

[0013] Preferably, a plurality of cutter heads capable of adjusting radially along the pipeline are provided on the cutting assembly.

[0014] Preferably, an elastic cushion block is provided at one end of the support arm for contacting the inner wall of the pipeline.

[0015] Preferably, a distance sensor is provided between the driving frame and the machine frame.

[0016] The beneficial effects of the present invention compared with the prior art are as follows:

[0017] 1. By moving the driving frame along the axial direction of the pipeline, the present invention synchronously drives a plurality of support arms to expand radially along the pipeline. After the plurality of support arms are attached to the inner wall of the pipeline, the frictional force generated by multi-point contact offsets the cantilever load of the cutting assembly at the pipeline port, so that the center of gravity of the beveling machine is stabilized inside the pipeline, completely getting rid of the limitation of the traditional beveling machine relying on a lifting rope or an external fixture, and significantly improving the convenience of operation in a narrow space. It avoids the processing error caused by unstable external fixation, reduces the installation and debugging time at the same time, and improves the construction efficiency.

[0018] 2. By further moving the driving frame, the cutting assembly will rotate around the axis of the pipeline, and under the feeding action of the driving frame, beveling processing is performed on the pipeline port. With the continuous movement of the driving frame, the supporting force of the support arm on the pipeline gradually increases, thereby compensating for the cutting force and vibration and improving the processing stability. Avoiding the traditional beveling machine relying on external fixtures or hoisting and fixing, this device can achieve automatic fixation by using the support arm structure of multi-point contact, is suitable for operation in a narrow space, and improves the construction convenience.

[0019] 3. Through the setting of the distance sensor, the present invention enables the change in the distance between the driving frame and the machine frame to be monitored, and can accurately detect the contact state between the support arm and the inner wall of the pipeline. Through the monitored distance data, the control system at the rear end can adjust the movement of the driving frame in real time to ensure that the support arm maintains a stable supporting force during the expansion process, avoid manual operation errors, improve the convenience and accuracy of operation, and reduce the influence of human factors on the processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional structural schematic diagram of a pipeline welding beveling machine with an automatic positioning function located in a pipeline.

[0021] Figure 2Schematic cross-sectional structure diagram when a pipe welding beveling machine with an automatic positioning function is inserted into a pipe.

[0022] Figure 3 Schematic cross-sectional structure diagram when the driving frame synchronously drives a plurality of support arms to unfold in a pipe welding beveling machine with an automatic positioning function.

[0023] Figure 4 Schematic cross-sectional structure diagram when the driving frame further moves to drive the cutting assembly to process the pipe cross-section in a pipe welding beveling machine with an automatic positioning function.

[0024] Figure 5 Schematic three-dimensional cross-sectional structure diagram of a pipe welding beveling machine with an automatic positioning function.

[0025] Figure 6 Schematic three-dimensional structure of a pipe welding beveling machine with an automatic positioning function Figure 1 。

[0026] Figure 7 Schematic three-dimensional structure of a pipe welding beveling machine with an automatic positioning function Figure 2 。

[0027] Figure 8 Schematic three-dimensional structure diagram of the cutting assembly, mounting plate and driving frame in a pipe welding beveling machine with an automatic positioning function.

[0028] Figure 9 Schematic three-dimensional structure diagram of the cutting assembly and mounting plate in a pipe welding beveling machine with an automatic positioning function.

[0029] Figure 10 Schematic three-dimensional structure diagram of the driving frame and the frame in a pipe welding beveling machine with an automatic positioning function.

[0030] The reference numerals in the figure are:

[0031] 1. Frame; 11. Driving frame; 111. First lead screw; 112. First guide rod; 113. Chute; 114. Elastic member; 115. Transmission shaft; 1151. Gear; 116. Second rotary drive motor; 12. Support arm; 121. Contact plate; 122. Support rod; 123. Connecting rod; 1231. Pulley; 13. Cutting assembly; 131. Tooth ring; 132. Tool bit; 14. First rotary drive motor; 15. Mounting frame; 151. Mounting ring; 1511. Avoidance groove; 16. Mounting plate; 161. Second lead screw; 162. Second guide rod; 17. Distance sensor; 2. Pipe. Detailed implementation mode

[0032] To further understand the features, technical means, specific purposes, and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] As Figures 1 to 5 shown: A pipe welding beveling machine with an automatic positioning function includes a frame 1. A driving frame 11 capable of sliding along the axial direction of the pipe 2 is provided on the frame 1. A plurality of support arms 12 evenly distributed around the axis of the pipe 2 are provided between the driving frame 11 and the frame 1. The plurality of support arms 12 can expand and contract synchronously along the radial direction of the pipe 2; One end of the driving frame 11 away from the frame 1 is provided with a cutting assembly 13 capable of rotating around the axis of the pipe 2; When the driving frame 11 moves along the axial direction of the pipe 2, the driving frame 11 can synchronously drive the plurality of support arms 12 to expand along the radial direction of the pipe 2 until the support arms 12 are in contact with the inner wall of the pipe 2. The cantilever load of the cutting assembly 13 at the port of the pipe 2 is offset by the multi-point contact between the support arms 12 and the pipe 2, realizing the automatic balance positioning of the beveling machine; After the support arms 12 are in contact with the inner wall of the pipe 2, the cutting assembly 13 rotates around the axis of the pipe 2, and at the same time, the cutting assembly 13 is driven to feed towards the port of the pipe 2 by the further movement of the driving frame 11.

[0034] In the initial state, the plurality of support arms 12 are contracted on the periphery of the frame 1, making the overall volume of the beveling machine small and facilitating it to be inserted into the pipe 2 without additional disassembly and assembly. When machining the end of the pipe 2, first, the frame 1 and the driving frame 11 are inserted into the pipe 2, and the cutting assembly 13 is located at the port of the pipe 2. At this time, by moving the driving frame 11 along the axial direction of the pipe 2, the plurality of support arms 12 are synchronously driven to expand along the radial direction of the pipe 2. Since the plurality of support arms 12 are evenly surrounded by the axis of the pipe 2 and are installed between the driving frame 11 and the frame 1, a symmetrical support structure can be formed, making the support of the beveling machine more stable.

[0035] It should be noted that during the movement of the driving frame 11, the cutting assembly 13 will be driven to move. However, when the driving frame 11 drives the support arms 12 to move, there is enough space for the support arms 12 to expand between the cutting assembly 13 and the port of the pipe 2.

[0036] When the plurality of support arms 12 are in contact with the inner wall of the pipe 2, the frictional force generated by the multi-point contact offsets the cantilever load of the cutting assembly 13 at the port of the pipe 2, stabilizing the center of gravity of the beveling machine inside the pipe 2, completely getting rid of the limitations of traditional beveling machines relying on suspension ropes or external fixtures, significantly improving the convenience of operation in narrow spaces. It avoids machining errors caused by unstable external fixation, reduces the installation and debugging time at the same time, and improves the construction efficiency.

[0037] After multiple support arms 12 are fixed to the beveling machine, the driving frame 11 will continue to move along the axis of the pipeline 2, so that the cutting assembly 13 can move with the driving assembly, and cooperate with the rotation of the cutting assembly 13 around the axis of the pipeline 2, thereby realizing beveling processing of the port of the pipeline 2, making the beveling processing process more accurate and efficient, reducing manual intervention, and improving the operation efficiency.

[0038] As the moving amount of the driving frame 11 increases, the supporting force between the support arm 12 and the inner wall of the pipeline 2 will increase, dynamically compensating the cutting force and vibration, further improving the stability of the beveling machine during the cutting process, prolonging the tool life, and improving the surface quality of the bevel.

[0039] As Figures 2 to 8 shown in the figure: A first lead screw 111 extending along the axis of the pipeline 2 is provided on the frame 1. The driving frame 11 is sleeved on the first lead screw 111 and is in threaded cooperation with it. A plurality of first guide rods 112 distributed around the axis of the first lead screw 111 are provided on the driving frame 11. The plurality of first guide rods 112 all extend towards the frame 1, and the first guide rods 112 are in sliding cooperation with the frame 1.

[0040] A first rotary drive motor 14 for driving its rotation is provided at the end of the first lead screw 111 on the frame 1. By starting the first rotary drive motor 14, the rotation of the output shaft of the first rotary drive motor 14 drives the rotation of the first lead screw 111. By the rotation of the first lead screw 111, the movement of the driving frame 11 in threaded cooperation with it is driven. Since a plurality of first guide rods 112 are provided on the driving frame 11, and the first guide rods 112 are in sliding cooperation with the frame 1, the driving frame 11 can slide along the axis direction of the first guide rods 112, thereby realizing the movement of the driving frame 11 driving a plurality of support arms 12 and the cutting assembly 13 in sequence.

[0041] Through the above driving method, the driving frame 11 can move precisely along the axis of the pipeline 2, ensuring that the feed amount of the beveling processing is uniform and controllable, and improving the processing accuracy. Compared with the traditional method of manually adjusting the feed amount, the processing efficiency is improved and the manual intervention is reduced. And since the driving devices are all installed on one side of the frame 1, the gravity of the beveling machine is located on the inner wall of the pipeline 2, which can effectively offset the cantilever load of the cutting assembly 13, reduce the vibration during cutting, and improve the processing stability. Cooperating with the synchronous expansion of a plurality of support arms 12 along the radial direction of the pipeline 2 until the support arms 12 are in contact with the inner wall of the pipeline 2, the automatic balance positioning of the beveling machine is realized, without the assistance of external fixtures or suspension ropes, improving the operation convenience.

[0042] In addition to the above-mentioned lead screw drive method, a hydraulic drive method can also be used. By setting a hydraulic cylinder between the drive frame 11 and the frame 1, the movement of the drive frame 11 is realized through the telescopic movement of the hydraulic cylinder. Compared with hydraulic drive, the first lead screw 111 drive is relatively more stable, which can effectively improve the accuracy and consistency of bevel processing. Moreover, the lead screw drive has good self-locking performance and can maintain the current pose after stopping the energy supply, improving the processing stability.

[0043] As Figures 2 to 8 shown: The support arm 12 includes a contact plate 121, a connecting rod 123 and two support rods 122. Two support rods 122 hinged to the frame 1 are arranged on the frame 1. The two support rods 122 are parallel to each other. The contact plate 121 is hinged to the other ends of the two support rods 122, and the contact plate 121 is parallel to the axis of the pipeline 2. The two ends of the connecting rod 123 are respectively connected to the drive frame 11 and the middle part of one of the support rods 122.

[0044] When the drive frame 11 moves along the axis direction of the pipeline 2, the movement of the drive frame 11 will drive the movement of the connecting rod 123. Through the movement of the connecting rod 123, the support rod 122 hinged to it will rotate, so that the support rod 122 rotates around the hinge point on the frame 1. Since the two support rods 122 are parallel to each other, and the ends of the two support rods 122 are both hinged with a contact plate 121, the two support rods 122 can rotate synchronously. Then, through the movement of the two support rods 122, the contact plate 121 is pushed towards the inner wall of the pipeline 2 until the contact plate 121 is closely attached to the inner wall of the pipeline 2. After multiple support arms 12 are unfolded and form multi-point contact with the inner wall of the pipeline 2, the center of gravity of the beveling machine is stabilized inside the pipeline 2, eliminating the cantilever load of the cutting component 13 and realizing automatic balance positioning.

[0045] As the drive frame 11 moves further, the cutting component 13 will rotate around the axis of the pipeline 2, and under the feeding action of the drive frame 11, bevel processing will be carried out on the port of the pipeline 2. As the drive frame 11 continues to move, the supporting force of the support arm 12 on the pipeline 2 gradually increases, thereby compensating for the cutting force and vibration and improving the processing stability. Avoiding the traditional beveling machine relying on external fixtures or hoisting for fixation, this device can achieve automatic fixation by using the multi-point contact support arm 12 structure, is suitable for operation in narrow spaces, and improves the construction convenience. Without manual intervention, the automation level of the equipment is improved. Since the support arm 12 can provide uniform multi-point support, reducing the deviation caused by vibration during cutting, thereby reducing the wear speed of the tool and prolonging the service life.

[0046] As Figures 2 to 8As shown in the figure: The driving frame 11 is provided with sliding grooves 113 that are the same in number as and correspond one-to-one with the support arms 12. The sliding grooves 113 extend along the axial direction of the pipeline 2. The end of the connecting rod 123 is provided with a pulley 1231 that is slidably matched with the sliding groove 113. The driving frame 11 is provided with an elastic member 114 that can push the pulley 1231 towards the side of the frame 1.

[0047] When the driving frame 11 moves along the axial direction of the pipeline 2, since the driving frame 11 is provided with an elastic member 114 that can push the pulley 1231 towards the side of the frame 1, the movement of the driving frame 11 drives the movement of the elastic member 114. Thus, the elastic member 114 pushes the pulley 1231 to move along the sliding groove 113. It should be noted that the elastic force of the elastic member 114 is preferably greater than the force required to unfold the support arm 12, so that the elastic member 114 can drive the support arm 12 to unfold as much as possible without change, and the abutting plate 121 of the support arm 12 can gradually fit with the inner wall of the pipeline 2. When the support arm 12 is fully unfolded and abuts against the inner wall of the pipeline 2, since the driving frame 11 continues to feed and the pulley is located at one end of the sliding groove 113 close to the frame 1, the further movement of the driving frame 11 at this time will compress the elastic member 114, resulting in an increase in the pressure between the driving frame 11 and the connecting rod 123, and further increasing the supporting force of the abutting plate 121 on the inner wall of the pipeline 2. This dynamic increase in pressure helps to compensate for the cutting force and vibration, ensuring the stability of the equipment during the bevel processing.

[0048] Due to the continuous support provided by the elastic member 114, the beveling machine remains stable throughout the processing process, preventing equipment displacement or a decrease in processing accuracy caused by vibration or cutting force fluctuations.

[0049] Since the elastic member 114 can still provide continuous pressure after the support arm 12 abuts against the inner wall of the pipeline 2, the support structure has an adaptive adjustment ability, which can effectively compensate for the vibration and impact during the cutting process, improving the stability and processing accuracy of the beveling machine. This enables the support arm 12 to remain stable throughout the processing process, avoiding equipment shaking caused by changes in the cutting force, ensuring the surface quality of the bevel; and the tool is more evenly stressed, reducing the partial wear caused by equipment shaking, extending the tool life, and reducing the maintenance cost.

[0050] At the same time, the movement of the driving frame 11 can drive the feeding of the support arm 12 and the cutting assembly 13 in sequence, so that the equipment does not need to set up independent drive sources for the support arm 12 and the cutting assembly 13 separately, reducing the cost of the equipment.

[0051] Such as Figures 5 to 10As shown in the figure: On the frame 1, there are mounting brackets 15 that are the same in number as and correspond one-to-one with the support arms 12. Two support rods 122 are hinged to the mounting brackets 15 on the frame 1. An installation ring 151 for connecting multiple mounting brackets 15 is also provided on the frame 1, and an avoidance groove 1511 for avoiding the support rods 122 is provided on the installation ring 151.

[0052] Through the setting of the mounting brackets 15, a stable rotation fulcrum for the support arms 12 is ensured. This arrangement of the mounting brackets 15 enables each support arm 12 to have an independent support structure, with uniform force distribution, avoiding problems such as structural deformation or uneven support force caused by single-point force application. Moreover, the multiple mounting brackets 15 are connected by the installation ring 151 to form a support frame with enhanced overall rigidity, improving the overall strength and stability of the frame 1.

[0053] The existence of the installation ring 151 can not only disperse the vibration and impact force generated during the processing of the beveling machine but also ensure that each support arm 12 moves synchronously during expansion and contraction, improving the overall coordination. Through the setting of the avoidance groove 1511, it is used to avoid the movement trajectory of the support rods 122, ensuring that the support arms 12 can closely fit against the circumferential side of the frame 1 in the retracted state, reducing space occupation and improving the structural compactness. This enables the support arms 12 to fold inward as much as possible, reducing the overall size of the beveling machine, facilitating the installation and movement of the beveling machine inside the pipeline 2, making the beveling machine applicable to pipeline 2 environments with different diameters and limited space, and improving the versatility and applicability of the equipment.

[0054] As Figures 5 to 10 shown in the figure: An installation disk 16 is provided between the cutting assembly 13 and the driving frame 11. The cutting assembly 13 is rotatably arranged on the installation disk 16. A second lead screw 161 and a second guide rod 162 that can extend along the axial direction of the pipeline 2 are provided on the installation disk 16. The driving frame 11 is sleeved on the second lead screw 161 and the second guide rod 162. The driving frame 11 is in threaded cooperation with the second lead screw 161 and in sliding cooperation with the second guide rod 162.

[0055] The cutting assembly 13 is rotatably mounted on the mounting plate 16 to ensure that it can rotate around the axis of the pipeline 2, so as to perform beveling processing. By rotating the second lead screw 161, the mounting plate 16 can move along the axis direction of the second guide rod 162, thereby realizing the control of the distance between the driving frame 11 and the mounting plate 16. Since the lead screw drive has a self-locking characteristic, it means that when no additional torque is applied from the outside, the position between the driving frame 11 and the mounting plate 16 will not displace. Thus, when the driving frame 11 moves, it can drive the mounting plate 16 to move. Through the movement of the mounting plate 16, it can drive the movement of the cutting assembly 13, so as to ensure that the cutting assembly 13 can stably maintain the feeding position and improve the processing accuracy. It should be noted that in order to ensure the stability of the mounting plate 16, a self-locking structure can also be set on the mounting plate 16. In the prior art, such as ratchet and pawl mechanisms, wedge self-locking mechanisms, friction self-locking mechanisms, etc. can all be used to prevent the mounting plate 16 from accidentally displacing during the cutting process, which will not be elaborated here one by one.

[0056] By adjusting the distance between the mounting plate 16 and the driving frame 11, it is convenient for the driving frame 11 to drive the cutting assembly 13 to perform beveling processing along the preset processing path when moving subsequently. It can not only adjust the initial position of the cutting assembly 13, but also optimize its feeding trajectory, ensure that the cutting assembly 13 can feed evenly and cut precisely along the port of the pipeline 2 during the processing, and further improve the quality and accuracy of beveling processing. At the same time, this structure enables the beveling machine to adapt to pipelines 2 with different diameters, improving the versatility and adaptability of the equipment.

[0057] Such as Figures 5 to 10 shown: A transmission shaft 115 capable of driving the mounting plate 16 to rotate is provided on the driving frame 11. The transmission shaft 115 is a telescopic structure. A gear 1151 is provided at the end of the transmission shaft 115. A gear ring 131 meshed with the gear 1151 is provided on the cutting assembly 13. A second rotary drive motor 116 for driving the transmission shaft 115 is provided on the driving frame 11.

[0058] During the working process of the beveling machine, the distance between the mounting plate 16 and the driving frame 11 may need to be adjusted. If the transmission shaft 115 is a fixed structure, the meshing between the gear 1151 and the gear ring 131 may be disengaged when the distance changes, resulting in transmission failure.

[0059] By adopting the telescopic transmission shaft 115, no matter how the distance between the mounting plate 16 and the driving frame 11 is adjusted, the gear 1151 at the end of the transmission shaft 115 can always transmit power to the gear ring 131 on the cutting assembly 13, ensuring the continuity and stability of the processing process.

[0060] It is installed on the driving frame 11 through the second rotary drive motor 116, so that the weight of the second rotary drive motor 116 is close to the central axis of the beveling machine and is located inside the pipeline 2, thereby shifting the overall center of gravity of the beveling machine inward. By setting the center of gravity inside the pipeline 2, compared with the traditional beveling machine that relies on external fixtures for fixation, the possibility of the equipment tilting or vibrating during cutting is greatly reduced, thereby improving the machining accuracy and equipment stability.

[0061] As Figures 5 to 9 shown: A plurality of tool heads 132 that can be adjusted radially along the pipeline 2 are provided on the cutting assembly 13.

[0062] By adjusting the position of the tool head 132, pipelines 2 with different diameters can be adapted to ensure that the tool head 132 can accurately contact the port of the pipeline 2 during bevel processing. The radial adjustment of the tool head 132 can adopt a manual adjustment screw, a lead screw mechanism or an electric drive device to ensure the accuracy and convenience of adjustment. During equipment operation, the cutting assembly 13 rotates around the axis of the pipeline 2, driving a plurality of tool heads 132 to perform bevel cutting. By adjusting the radial position of the tool head 132, the cutting depth and angle of the bevel can be controlled to meet different process requirements.

[0063] The tool heads 132 can be adjusted individually. Even if there are deviations or uneven wall thicknesses in the pipeline 2, it can ensure that all tool heads 132 are evenly contacted, realizing high-quality bevel processing. The applicable range of the equipment is improved. The radial adjustment mechanism of the tool head 132 can dynamically compensate for the deformation or manufacturing error of the pipeline 2, ensuring that the tool head 132 always fits the port of the pipeline 2 during actual cutting, reducing vibration, and improving the durability of the equipment and the tool life.

[0064] As Figures 1 to 6 shown: An elastic cushion block is provided at one end of the support arm 12 for contacting the inner wall of the pipeline 2.

[0065] Through the setting of the elastic cushion block (not shown in the figure), the elastic cushion block can automatically adapt to the small deformations and surface unevenness of the inner wall of the pipeline 2, ensuring a larger area of fit and improving the support stability. Since the elastic cushion block usually uses materials with a high coefficient of friction (such as rubber, polyurethane or special composite materials), it can form a stronger grip on the inner wall of the pipeline 2, preventing the beveling machine from displacing due to vibration or load changes during cutting. At the same time, the elastic cushion block plays a role in buffering and absorbing vibration, reducing unstable factors during cutting, improving the overall stability of the beveling machine, and thus improving the bevel quality and tool life.

[0066] As Figure 6 、 Figure 8 and Figure 10 shown: A distance sensor 17 is provided between the driving frame 11 and the machine frame 1.

[0067] Through the setting of the distance sensor 17, the change in the distance between the driving frame 11 and the frame 1 can be monitored, and the contact state between the support arm 12 and the inner wall of the pipeline 2 can be accurately detected. When the driving frame 11 moves, the sensor will timely feedback the distance between the support arm 12 and the inner wall of the pipeline 2 to ensure that the support arm 12 can be evenly unfolded and in good contact with the inner wall of the pipeline 2. Through the monitored distance data, the control system at the back end can timely adjust the movement of the driving frame 11 to ensure that the support arm 12 maintains a stable supporting force during the unfolding process. When the support arm 12 is fully unfolded and fits with the inner wall of the pipeline 2, the sensor will feedback the information that the contact is completed, prompting the driving frame 11 to stop further movement or adjustment. It avoids manual operation errors, improves the convenience and accuracy of the operation, and reduces the influence of human factors on the processing quality.

[0068] The above embodiments only represent one or several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. A pipe welding beveling machine with an automatic positioning function, comprising a frame (1), characterized in that, A driving frame (11) capable of sliding along the axial direction of a pipeline (2) is arranged on a frame (1). A plurality of support arms (12) evenly distributed around the axis of the pipeline (2) are arranged between the driving frame (11) and the frame (1). The plurality of support arms (12) can synchronously expand and contract along the radial direction of the pipeline (2); One end of the driving frame (11) far from the frame (1) is provided with a cutting assembly (13) capable of rotating around the axis of the pipeline (2); When the driving frame (11) moves along the axial direction of the pipeline (2), the driving frame (11) can synchronously drive a plurality of support arms (12) to expand along the radial direction of the pipeline (2) until the support arms (12) are in contact with the inner wall of the pipeline (2). The cantilever load of the cutting assembly (13) at the port of the pipeline (2) is offset by the multi-point contact between the support arms (12) and the pipeline (2), realizing the automatic balance positioning of the beveling machine; After the support arms (12) are in contact with the inner wall of the pipeline (2), the cutting assembly (13) rotates around the axis of the pipeline (2), and at the same time, the cutting assembly (13) is driven to feed towards the port of the pipeline (2) by the further movement of the driving frame (11); The support arm (12) includes a contact plate (121), a connecting rod (123) and two support rods (122). Two support rods (122) hinged to the frame (1) are arranged on the frame (1). The two support rods (122) are parallel to each other. The contact plate (121) is hinged to the other ends of the two support rods (122), and the contact plate (121) is parallel to the axis of the pipeline (2). The two ends of the connecting rod (123) are respectively connected to the driving frame (11) and the middle part of one of the support rods (122); A plurality of chutes (113) corresponding to the number of the support arms (12) one by one are arranged on the driving frame (11). The chutes (113) extend along the axial direction of the pipeline (2). A pulley (1231) slidably matched with the chute (113) is arranged at the end of the connecting rod (123). An elastic member (114) capable of pushing the pulley (1231) towards the frame (1) side is arranged on the driving frame (11); A plurality of mounting frames (15) corresponding to the number of the support arms (12) one by one are arranged on the frame (1). The two support rods (122) are hinged to the mounting frames (15) on the frame (1). An installation ring (151) for connecting a plurality of mounting frames (15) is further arranged on the frame (1). An avoidance groove (1511) for avoiding the support rods (122) is arranged on the installation ring (151); A transmission shaft (115) capable of driving an installation disk (16) to rotate is arranged on the driving frame (11). The transmission shaft (115) is a telescopic structure. A gear (1151) is arranged at the end of the transmission shaft (115). A toothed ring (131) meshed with the gear (1151) is arranged on the cutting assembly (13). A second rotary drive motor (116) for driving the transmission shaft (115) is arranged on the driving frame (11); A plurality of tool heads (132) capable of adjusting along the radial direction of the pipeline (2) are arranged on the cutting assembly (13).

2. The pipe welding beveling machine with an automatic positioning function according to claim 1, characterized in that, A first lead screw (111) extending along the axial direction of the pipeline (2) is provided on the frame (1). The driving frame (11) is sleeved on the first lead screw (111) and is in threaded cooperation with it. A plurality of first guide rods (112) distributed around the axis of the first lead screw (111) are provided on the driving frame (11). The plurality of first guide rods (112) all extend towards the frame (1), and the first guide rods (112) are in sliding cooperation with the frame (1).

3. The pipe welding beveling machine with an automatic positioning function according to claim 1, characterized in that, An installation disc (16) is provided between the cutting assembly (13) and the driving frame (11). The cutting assembly (13) is rotatably arranged on the installation disc (16). A second lead screw (161) and a second guide rod (162) extending along the axial direction of the pipeline (2) are provided on the installation disc (16). The driving frame (11) is sleeved on the second lead screw (161) and the second guide rod (162). The driving frame (11) is in threaded cooperation with the second lead screw (161), and the driving frame (11) is in sliding cooperation with the second guide rod (162).

4. A pipe welding beveling machine with an automatic positioning function according to any one of claims 1-3, characterized in that, An elastic cushion block is provided at one end of the support arm (12) for contacting the inner wall of the pipeline (2).

5. A pipe welding beveling machine with an automatic positioning function according to any one of claims 1-3, characterized in that, A distance sensor (17) is provided between the driving frame (11) and the frame (1).

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