Pipeline welding beveling machine with automatic positioning function

Abstract

The invention relates to the technical field of mechanical cutting, in particular to a pipeline welding beveling machine with an automatic positioning function, which comprises a rack and a driving frame, a plurality of supporting arms are arranged between the driving frame and the rack, and a cutting assembly is arranged at one end, far away from the rack, of the driving frame; the driving frame moves in the axis direction of the pipeline, the multiple supporting arms are synchronously driven to be unfolded in the radial direction of the pipeline, after the multiple supporting arms are attached to the inner wall of the pipeline, the friction force generated by multi-point contact counteracts the cantilever load, located at the end opening of the pipeline, of the cutting assembly, and the gravity center of the beveling machine is stabilized in the pipeline; and along with continuous movement of the driving frame, the supporting force of the supporting arm on the pipeline is gradually enhanced, so that the cutting force and vibration are compensated, and the machining stability is improved. The situation that a traditional beveling machine depends on an external clamp or is fixed in a hoisting mode is avoided, automatic fixing can be achieved through a multi-point contact supporting arm structure, the device is suitable for operation in a narrow space, and construction convenience is improved.

Description

Technical Field

[0001] 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. 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 confined 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 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 the steel pipe can be firmly clamped 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 an internal bracing structure within a sleeve 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 along the inner wall of the steel pipe through a roller device, improving 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 towards the outside. During 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 driving 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 multi-point contact offsets the cantilever load of the cutting assembly at the pipeline port, making the center of gravity of the beveling machine 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 prior art, the present invention provides a pipe welding beveling machine with an automatic positioning function, which includes a frame. A driving frame capable of sliding 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; at one end of the driving frame far from the frame, a cutting assembly capable of rotating around the axis of the pipe is arranged; 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 cantilever load of the cutting assembly at the pipe port is offset by the multi-point contact between the support arms and the pipe, 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 assembly rotates around the axis of the pipe, and at the same time, the cutting assembly is driven to feed towards the pipe port by the further movement of the driving frame.

[0007] Preferably, a first lead screw capable of extending 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, the driving frame is provided with chutes having the same number as and corresponding to the support arms one by one. 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 capable of pushing the pulley towards the frame side is arranged on the driving frame.

[0010] Preferably, mounting brackets having 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 further 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 assembly and the driving frame. The cutting assembly is rotatably arranged on the installation disc. A second lead screw and a second guide rod capable of extending 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 disk 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: 1. By moving the driving frame along the axial direction of the pipeline, a plurality of support arms are synchronously driven 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 cancels out 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 traditional beveling machines relying on suspension ropes or external fixtures, and significantly improving the convenience of operation in narrow spaces. It avoids the processing errors caused by unstable external fixation, reduces the installation and debugging time at the same time, and improves the construction efficiency.

[0017] 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 carried out 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 dependence of traditional beveling machines on external fixtures or hoisting fixation, this device can achieve automatic fixation by using the support arm structure of multi-point contact, is suitable for operation in narrow spaces, and improves the construction convenience.

[0018] 3. Through the setting of the distance sensor, the change in the distance between the driving frame and the machine frame can be monitored, and the contact state between the support arm and the inner wall of the pipeline can be accurately detected. 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

[0019] Figure 1 is a three-dimensional structural schematic diagram of a pipeline welding beveling machine with an automatic positioning function located in a pipeline.

[0020] Figure 2 is a sectional structural schematic diagram of a pipeline welding beveling machine with an automatic positioning function when it is inserted into the pipeline.

[0021] Figure 3 It is a 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.

[0022] Figure 4 It is a schematic cross-sectional structure diagram when the driving frame further moves to drive the cutting assembly to process the pipe section in a pipe welding beveling machine with an automatic positioning function.

[0023] Figure 5 It is a schematic three-dimensional cross-sectional structure diagram of a pipe welding beveling machine with an automatic positioning function.

[0024] Figure 6 It is a schematic three-dimensional structure of a pipe welding beveling machine with an automatic positioning function Figure 1 .

[0025] Figure 7 It is a schematic three-dimensional structure of a pipe welding beveling machine with an automatic positioning function Figure 2 .

[0026] Figure 8 It is a schematic three-dimensional structure diagram of the cutting assembly, mounting disc and driving frame in a pipe welding beveling machine with an automatic positioning function.

[0027] Figure 9 It is a schematic three-dimensional structure diagram of the cutting assembly and mounting disc in a pipe welding beveling machine with an automatic positioning function.

[0028] Figure 10 It is a schematic three-dimensional structure diagram of the driving frame and the machine frame in a pipe welding beveling machine with an automatic positioning function.

[0029] The reference numerals in the figure are: 1, machine 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, abutting plate; 122, support rod; 123, connecting rod; 1231, pulley; 13, cutting assembly; 131, gear ring; 132, cutter head; 14, first rotary drive motor; 15, mounting bracket; 151, mounting ring; 1511, avoidance groove; 16, mounting disc; 161, second lead screw; 162, second guide rod; 17, distance sensor; 2, pipe. Detailed implementation manners

[0030] In order 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 drawings and specific implementation manners.

[0031] As shown Figures 1 to 5 : A pipe welding beveling machine with an automatic positioning function, including a frame 1. A driving frame 11 capable of sliding along the axial direction of the pipe 2 is arranged on the frame 1. A plurality of support arms 12 evenly distributed around the axis of the pipe 2 are arranged 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 attached to 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 attached to 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.

[0032] In the initial state, the plurality of support arms 12 contract 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 insert the frame 1 and the driving frame 11 into the pipe 2. 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 distributed around 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.

[0033] 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.

[0034] When the plurality of support arms 12 are attached to 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.

[0035] After the plurality of support arms 12 fix the beveling machine, the driving frame 11 will continue to move along the axis of the pipe 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 pipe 2, thereby realizing beveling machining of the port of the pipe 2, making the beveling machining process more accurate and efficient, reducing manual intervention, and improving the operation efficiency.

[0036] As the moving amount of the driving frame 11 increases, the supporting force between the supporting arm 12 and the inner wall of the pipeline 2 will increase progressively, dynamically compensating for the cutting force and vibration, further enhancing the stability of the beveling machine during the cutting process, prolonging the tool life, and improving the surface quality of the bevel.

[0037] As Figures 2 to 8 shown in the figure: 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.

[0038] 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. The rotation of the first lead screw 111 drives the movement of the driving frame 11 in threaded cooperation with it. 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 axial direction of the first guide rods 112, thereby realizing the movement of the driving frame 11 to drive a plurality of supporting arms 12 and the cutting assembly 13 in sequence.

[0039] Through the above driving method, the driving frame 11 can achieve precise movement along the axial direction of the pipeline 2, ensuring that the feed amount of bevel 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 supporting arms 12 along the radial direction of the pipeline 2 until the supporting 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 lifting ropes, improving the operation convenience.

[0040] In addition to the above lead screw transmission method, a hydraulic drive method can also be used. By providing a hydraulic cylinder between the driving frame 11 and the frame 1, the movement of the driving 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. And the lead screw transmission has good self-locking performance, which can maintain the current pose after stopping the energy supply, improving the processing stability.

[0041] As Figures 2 to 8As shown in the figure: 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.

[0042] When the driving frame 11 moves along the axis direction of the pipeline 2, the movement of the driving 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 be driven to 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 contact plates 121 are hinged to the ends of the two support rods 122, the two support rods 122 can rotate synchronously. Furthermore, the movement of the two support rods 122 pushes the contact plate 121 to move 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.

[0043] With the further movement of the driving frame 11, the cutting component 13 will rotate around the axis of the pipeline 2, and under the feeding action of the driving frame 11, bevel processing will be carried out on the port of the pipeline 2. With the continuous movement of the driving frame 11, the supporting force of the support arm 12 on the pipeline 2 is gradually enhanced, 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 the cutting process, thereby reducing the wear speed of the tool and extending the service life.

[0044] As Figures 2 to 8 shown in the figure: The driving frame 11 is provided with sliding grooves 113 having the same number as and corresponding to the support arms 12 one by one. The sliding grooves 113 extend along the axis direction of the pipeline 2. The end of the connecting rod 123 is provided with a pulley 1231 slidably matched with the sliding groove 113. The driving frame 11 is provided with an elastic member 114 that can drive the pulley 1231 to push towards the frame 1 side.

[0045] When the driving frame 11 moves along the axial direction of the pipeline 2, since an elastic member 114 is provided on the driving frame 11 which can drive the pulley 1231 to push towards the frame 1 side, the movement of the driving frame 11 drives the movement of the elastic member 114. Thus, the elastic member 114 is used to push the pulley 1231 to move along the chute 113. It should be noted that the elastic force of the elastic member 114 is preferably greater than the force required to deploy the support arm 12, so that the elastic member 114 can drive the support arm 12 to deploy 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 deployed 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 chute 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 machining process.

[0046] Due to the continuous support provided by the elastic member 114, the beveling machine remains stable throughout the machining process, preventing equipment displacement or a decrease in machining accuracy caused by vibration or cutting force fluctuations.

[0047] 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 machining accuracy of the beveling machine. This enables the support arm 12 to remain stable throughout the machining 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 eccentric wear caused by equipment shaking, extending the tool life, and reducing maintenance costs.

[0048] At the same time, the movement of the driving frame 11 can sequentially drive the feeding of the support arm 12 and the cutting assembly 13, so that the equipment does not need to separately set up independent drive sources for the support arm 12 and the cutting assembly 13, reducing the cost of the equipment.

[0049] As Figures 5 to 10 shown: The frame 1 is provided with mounting frames 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 frames 15 on the frame 1. The frame 1 is also provided with a mounting ring 151 for connecting multiple mounting frames 15, and the mounting ring 151 is provided with an avoidance groove 1511 for avoiding the support rods 122.

[0050] Through the setting of the mounting frame 15, a stable rotation fulcrum for the support arm 12 is ensured. This arrangement of the mounting frame 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, multiple mounting frames 15 are connected through the mounting ring 151 to form a support frame with enhanced overall rigidity, improving the overall strength and stability of the machine frame 1.

[0051] The existence of the mounting 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 remains synchronized 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 rod 122, ensuring that the support arm 12 can closely fit against the circumferential side of the machine frame 1 in the contracted state, reducing space occupation and improving the structural compactness. This enables the support arm 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 suitable for pipeline 2 environments with different diameters and limited space, and improving the versatility and applicability of the equipment.

[0052] As Figures 5 to 10 shown: An installation disk 16 is provided between the cutting assembly 13 and the drive frame 11. The cutting assembly 13 is rotatably arranged on the installation disk 16. The installation disk 16 is provided with a second lead screw 161 and a second guide rod 162 that can extend along the axial direction of the pipeline 2. The drive frame 11 is sleeved on the second lead screw 161 and the second guide rod 162. The drive frame 11 is in threaded cooperation with the second lead screw 161 and in sliding cooperation with the second guide rod 162.

[0053] The cutting assembly 13 is rotatably installed on the installation disk 16 to ensure that it can rotate around the axis of the pipeline 2 for beveling processing. By rotating the second lead screw 161, the installation disk 16 can move along the axial direction of the second guide rod 162, thereby realizing the control of the distance between the drive frame 11 and the installation disk 16. Since the lead screw drive has a self-locking characteristic, it means that when no additional external torque is applied, the position between the drive frame 11 and the installation disk 16 will not displace. Thus, when the drive frame 11 moves, it can drive the installation disk 16 to move. Through the movement of the installation disk 16, it can drive the movement of the cutting assembly 13, thereby ensuring that the cutting assembly 13 can stably maintain the feeding position and improving the processing accuracy. It should be noted that in order to ensure the stability of the installation disk 16, a self-locking structure can also be provided on the installation disk 16. In the prior art, such as ratchet and pawl mechanisms, wedge self-locking mechanisms, friction self-locking mechanisms, etc. can be used to prevent the installation disk 16 from accidentally displacing during the cutting process, which will not be elaborated here one by one.

[0054] By adjusting the distance between the mounting disc 16 and the driving frame 11, it is convenient for the driving frame 11 to drive the cutting assembly 13 to perform bevel processing along a preset processing path during subsequent movement. It can not only adjust the initial position of the cutting assembly 13, but also optimize its feeding trajectory, ensuring that the cutting assembly 13 can feed evenly and cut precisely along the port of the pipeline 2 during the processing, further improving the quality and accuracy of bevel processing. At the same time, this structure enables the beveling machine to adapt to pipelines 2 of different diameters, improving the versatility and adaptability of the equipment.

[0055] As Figures 5 to 10 shown: A transmission shaft 115 capable of driving the mounting disc 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.

[0056] During the working process of the beveling machine, the distance between the mounting disc 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.

[0057] By adopting the telescopic transmission shaft 115, no matter how the distance between the mounting disc 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.

[0058] By installing the second rotary drive motor 116 on the driving frame 11, 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 fixed by external fixtures, the possibility of the equipment tilting or vibrating during cutting is greatly reduced, thereby improving the processing accuracy and equipment stability.

[0059] As Figures 5 to 9 shown: A plurality of cutter heads 132 capable of being adjusted radially along the pipeline 2 are provided on the cutting assembly 13.

[0060] By adjusting the position of the cutter head 132, it can adapt to pipelines 2 of different pipe diameters, ensuring that the cutter head 132 can precisely contact the port of the pipeline 2 during bevel processing. The radial adjustment of the cutter 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 cutter heads 132 to perform bevel cutting. By adjusting the radial position of the cutter head 132, the cutting depth and angle of the bevel can be controlled to meet different process requirements.

[0061] The cutter head 132 can be adjusted individually. Even if there are deviations in the pipeline 2 or uneven wall thickness, it can ensure that all cutter heads 132 are in uniform contact, achieving high-quality bevel processing and expanding the applicable range of the equipment. The radial adjustment mechanism of the cutter head 132 can dynamically compensate for the deformation or manufacturing errors of the pipeline 2, ensuring that the cutter head 132 always fits the port of the pipeline 2 during the actual cutting process, reducing vibration, and improving the durability of the equipment and the tool life.

[0062] Such as Figures 1 to 6 shown: One end of the support arm 12 that is used to contact the inner wall of the pipeline 2 is provided with an elastic cushion block.

[0063] Through the setting of the elastic cushion block (not shown in the figure), the elastic cushion block can automatically adapt to the minor deformation and surface unevenness of the inner wall of the pipeline 2, ensuring a larger contact area 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 force on the inner wall of the pipeline 2, preventing the beveling machine from shifting due to vibration or load changes during the cutting process. At the same time, the elastic cushion block plays a role in buffering and absorbing vibration, reducing unstable factors during the cutting process, improving the overall stability of the beveling machine, and thus enhancing the bevel quality and tool life.

[0064] Such as Figure 6 、 Figure 8 and Figure 10 shown: A distance sensor 17 is provided between the drive frame 11 and the frame 1.

[0065] Through the setting of the distance sensor 17, the change in the distance between the drive 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 drive frame 11 moves, the sensor will real-time feedback the distance between the support arm 12 and the inner wall of the pipeline 2, ensuring 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 real-time adjust the movement of the drive frame 11 to ensure that the support arm 12 maintains a stable support force during the unfolding process. When the support arm 12 is fully unfolded and fits the inner wall of the pipeline 2, the sensor will feedback the information of the contact completion, prompting the drive frame 11 to stop further movement or adjustment. Avoiding manual operation errors, improving the convenience and accuracy of the operation, and reducing the influence of human factors on the processing quality.

[0066] The above embodiments merely represent one or several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to 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 modifications and improvements can still be made, and these all fall within 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 pipeline welding beveling machine with automatic positioning function, comprising a frame (1), characterized in that: A driving frame (11) capable of sliding along the axial direction of the pipeline (2) is arranged on the frame (1), and a plurality of supporting arms (12) equidistantly distributed around the axial direction of the pipeline (2) are arranged between the driving frame (11) and the frame (1), and the plurality of supporting arms (12) can be synchronously expanded and contracted along the radial direction of the pipeline (2); A cutting assembly (13) capable of rotating around the axis of the pipe (2) is provided on one end of the driving frame (11) away from the frame (1); 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), and the cantilever load of the cutting assembly (13) located at the end of the pipe (2) is offset by the multi-point contact between the support arms (12) and the pipe (2), thereby realizing automatic balanced positioning of the groove machine; After the support arm (12) is in contact with the inner wall of the pipe (2), the cutting assembly (13) rotates around the axis of the pipe (2), and the driving frame (11) is further moved to drive the cutting assembly (13) to feed toward the end of the pipe (2); The support arm (12) comprises an abutment plate (121), a connecting rod (123) and two support rods (122); the frame (1) is provided with two support rods (122) hinged thereto; the two support rods (122) are parallel to each other; the abutment plate (121) is hinged to the other ends of the two support rods (122); the abutment plate (121) is parallel to the axis of the pipeline (2); and 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); The driving frame (11) is provided with slide grooves (113) having the same number as the supporting arms (12) and corresponding to each other. The slide 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 slidably cooperates with the slide groove (113). The driving frame (11) is provided with an elastic member (114) that can drive the pulley (1231) to push toward the side of the frame (1).

2. The pipeline welding beveling machine with automatic positioning function according to claim 1, characterized in that: The frame (1) is provided with a first screw rod (111) that can extend along the axial direction of the pipeline (2); the driving frame (11) is sleeved on the first screw rod (111) and threadedly engaged with the first screw rod (111); the driving frame (11) is provided with a plurality of first guide rods (112) that are distributed around the axis of the first screw rod (111); the plurality of first guide rods (112) all extend in the direction of the frame (1); and the first guide rods (112) are slidably engaged with the frame (1).

3. The pipeline welding beveling machine with automatic positioning function according to claim 1, characterized in that: The frame (1) is provided with mounting frames (15) the same number as the supporting arms (12) and corresponding one to one, two supporting rods (122) are hingedly connected to the mounting frames (15) on the frame (1), and the frame (1) is also provided with a mounting ring (151) for connecting the plurality of mounting frames (15), and the mounting ring (151) is provided with an avoidance groove (1511) for avoiding the supporting rods (122).

4. The pipeline welding beveling machine with automatic positioning function according to claim 1, characterized in that: A mounting plate (16) is provided between the cutting assembly (13) and the driving frame (11); the cutting assembly (13) is rotatably arranged on the mounting plate (16); a second screw rod (161) and a second guide rod (162) which can extend along the axial direction of the pipe (2) are provided on the mounting plate (16); the driving frame (11) is sleeved on the second screw rod (161) and the second guide rod (162); the driving frame (11) and the second screw rod (161) are threadedly matched; and the driving frame (11) and the second guide rod (162) are slidably matched.

5. The pipeline welding beveling machine with automatic positioning function according to claim 1, characterized in that: A transmission shaft (115) capable of driving the mounting plate (16) to rotate is disposed on the driving frame (111); the transmission shaft (115) is a retractable structure; a gear (1151) is disposed at the end of the transmission shaft (115); a gear ring (131) meshingly connected to the gear (1151) is disposed on the cutting assembly (13); and a second rotation driving motor (116) for driving the transmission shaft (115) is disposed on the driving frame (11).

6. The pipeline welding beveling machine with automatic positioning function according to claim 4, characterized in that: The cutting assembly (13) is provided with a plurality of cutting heads (132) which can be adjusted along the radial direction of the pipe (2).

7. A pipeline welding beveling machine with automatic positioning function according to any one of claims 1 to 6, characterized in that: An elastic pad is provided on one end of the support arm (12) for contacting the inner wall of the pipe (2).

8. A pipeline welding beveling machine with automatic positioning function according to any one of claims 1 to 6, characterized in that: A distance sensor (17) is provided between the driving frame (11) and the frame (1).

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