Groove pipe cutting machine

Abstract

The utility model relates to the technical field of laser cutting, and discloses a groove pipe cutting machine which comprises a side hanging frame, a rear chuck assembly hung on the side hanging frame, a supporting seat arranged at the front end of the side hanging frame, a front chuck assembly fixedly arranged at the top of the supporting seat and a laser cutting assembly. The laser cutting assembly comprises a support arranged on the front end face of the supporting base in an up-down sliding mode, a Y-axis sliding base arranged on the top of the support in a front-back sliding mode, an X-axis sliding base arranged on the Y-axis sliding base in a left-right sliding mode, an A-axis rotary table arranged on one side face of the X-axis sliding base and a laser cutting head arranged on the A-axis rotary table through a mounting frame. The support is driven by the Z-axis driving mechanism to move vertically, the support is provided with a Y-axis driving mechanism used for driving the Y-axis sliding seat to move front and back, and the X-axis sliding seat is driven by the X-axis driving mechanism to move left and right. The laser cutting assembly of the groove pipe cutting machine has a multi-axis moving function and is high in machining precision and good in short tailing processing capacity.

Description

Technical Field

[0001] The utility model relates to the technical field of laser cutting, in particular to a bevel pipe cutting machine. Background Art

[0002] With the rapid development of the manufacturing industry, laser pipe cutting machines not only need to have the function of straight pipe cutting, but also need to have the function of bevel cutting. However, in the existing technology, the laser cutting mechanism of laser pipe cutting machines is generally arranged on a gantry to form a gantry cutting mechanism, which limits the ability of the laser cutting mechanism to move back and forth. If short tail stock cutting is to be achieved, only the side hanging frame slidably installed on the front chuck can be movably arranged. Such a laser cutting machine has the following problems: 1. The traditional gantry cutting mechanism makes the overall height of the laser pipe cutting machine relatively large, which is not convenient for container loading and transportation; 2. The load-bearing capacity of the movably arranged front chuck with side hanging is weak and the stability is poor. Especially when running at high speed or processing heavy pipes, additional vibrations may occur, affecting the cutting quality and accuracy.

[0003] It can be seen that the existing technology still needs to be improved. Summary of the Utility Model

[0004] In view of the above deficiencies of the existing technology, the purpose of the present utility model is to provide a bevel pipe cutting machine, aiming to eliminate the problems of the traditional gantry cutting mechanism in pipe cutting processing and improve the processing accuracy and short tail stock processing ability.

[0005] To achieve the above purpose, the present utility model adopts the following technical solutions:

[0006] A bevel pipe cutting machine includes a side hanging frame, a rear chuck assembly movably hung on the side hanging frame, a support seat arranged at the front end of the side hanging frame, a front chuck assembly fixed on the top of the support seat, a laser cutting assembly arranged on the front end face of the support seat, a plurality of arms arranged side by side along the front-rear direction beside the side hanging frame, and a centering follow-up mechanism and / or a variable diameter wheel support mechanism arranged on the arms. The centering follow-up mechanism is used to clamp the pipe to make the pipe centered, and the variable diameter wheel support mechanism is used to support the pipe. The laser cutting assembly includes a bracket slidably arranged up and down on the front end face of the support seat, a Y-axis slide seat slidably arranged back and forth on the top of the bracket, an X-axis slide seat slidably arranged left and right on the Y-axis slide seat, an A-axis turntable arranged on one side face of the X-axis slide seat, and a laser cutting head arranged on the A-axis turntable through a mounting frame. The bracket moves vertically under the drive of a Z-axis drive mechanism, and a Y-axis drive mechanism for driving the Y-axis slide seat to move back and forth is arranged on the bracket. The X-axis slide seat moves left and right under the drive of an X-axis drive mechanism.

[0007] As a further improvement of the above technical solution, the Y-axis slide is slidably arranged on the top of the bracket through the first Y-axis guide rail and the Y-axis slider. The Y-axis driving mechanism includes a cylinder bracket fixed on the bracket, a cylinder arranged on the cylinder bracket, and a transmission plate arranged at the bottom of the Y-axis slide. The end of the piston rod of the cylinder is drivingly connected to the transmission plate.

[0008] As a further improvement of the above technical solution, two Z-axis guide rails are arranged on the front end face of the support seat. Z-axis sliders matching the Z-axis guide rails are arranged on the bracket. The Z-axis driving mechanism includes a Z-axis driving motor fixed on the bracket, a first gear arranged at the output end of the Z-axis driving motor, and a Z-axis rack vertically fixed on the front end face of the support seat. The first gear is in meshing transmission with the Z-axis rack.

[0009] Two X-axis guide rails are arranged on the Y-axis slide. X-axis sliders matching the X-axis guide rails are arranged on the bottom surface of the X-axis slide. The X-axis driving mechanism includes an X-axis driving motor fixed on the X-axis slide, a second gear arranged at the output end of the X-axis driving motor, and an X-axis rack extending left and right on the Y-axis slide. The second gear is in meshing transmission with the X-axis rack.

[0010] As a further improvement of the above technical solution, dust-proof covers for covering the first Y-axis guide rail are arranged on the front and rear sides of the Y-axis slide. Side enclosures for covering the X-axis guide rail and the X-axis slider are arranged on the X-axis slide.

[0011] As a further improvement of the above technical solution, the variable-diameter wheel support mechanism includes a first mounting plate body arranged on the support arm, a first lifting cylinder arranged upward on the first mounting plate body, a receiving frame drivingly connected to the first lifting cylinder, a support shaft fixed on the receiving frame, a variable-diameter wheel rotatably arranged on the support shaft, and a locking structure for fixedly locking the variable-diameter wheel.

[0012] As a further improvement of the above technical solution, the centering follow-up mechanism includes an L-shaped plate, two clamping blocks symmetrically arranged left and right and slidably arranged on the L-shaped plate, a clamping driving cylinder for driving the two clamping blocks to approach or move away from each other, and a lifting assembly for driving the L-shaped plate to move up and down.

[0013] As a further improvement of the above technical solution, the lifting assembly includes a second mounting plate body fixed on the support arm, an adjustment seat vertically slidably arranged on the second mounting plate body, and a second lifting cylinder arranged upward on the adjustment seat. The end of the piston rod of the second lifting cylinder is drivingly connected to the L-shaped plate. A height-adjusting screw pressing against the second mounting plate body is arranged on the adjustment seat.

[0014] As a further improvement of the above technical solution, a second Y-axis guide rail and a Y-axis rack are provided on the side hanging rack. The rear chuck assembly includes a slide plate, a rear chuck body disposed on the slide plate, a Y-axis drive motor disposed on the slide plate, and a third gear disposed on the output end of the Y-axis drive motor. The third gear is in meshing transmission with the Y-axis rack.

[0015] As a further improvement of the above technical solution, the deflection angle range of the laser cutting head driven by the A-axis turntable is ±45°.

[0016] Advantages of the present utility model: Compared with the prior art, the laser cutting assembly in the bevel cutting machine provided by the present utility model has a multi-axis movement function, greatly improving the flexibility of the pipe cutting machine when processing pipes of various lengths and diameters, and being able to perform straight cutting and bevel cutting operations more efficiently. Especially when cutting short tail materials, the laser cutting head on the Y-axis slide is moved back and forth through the Y-axis drive mechanism, breaking the limitation that the traditional laser cutting mechanism is fixed on the gantry beam, thereby increasing the freedom degree of the cutting path, enabling the laser cutting assembly to more flexibly adapt to pipes of different lengths and shapes, reducing the generation of tail materials, and reducing material waste. In addition, the laser cutting assembly of the bevel cutting machine replaces the traditional gantry beam type cutting mechanism, not only reducing the overall height of the laser pipe cutting machine, simplifying the transportation and installation process of the equipment, but also enabling the front chuck assembly to be fixedly arranged on the support seat, enhancing the stability when processing heavy pipes, effectively reducing vibration, and ensuring the cutting accuracy and quality. Description of the Drawings

[0017] Figure 1 is a three-dimensional view of the bevel pipe cutting machine Figure 1 .

[0018] Figure 2 is a three-dimensional view of the bevel pipe cutting machine Figure 2 .

[0019] Figure 3 is Figure 1 a partial enlarged view of area A in

[0020] Figure 4 is Figure 2 a partial enlarged view of area B in

[0021] Figure 5 is a three-dimensional view of the laser cutting assembly Figure 1 .

[0022] Figure 6 is a three-dimensional view of the laser cutting assembly Figure 2 .

[0023] Figure 7 is a three-dimensional view of the laser cutting assembly Figure 3 .

[0024] Figure 8 Perspective view after hiding the dust cover and side panels for the laser cut components.

[0025] Description of the main component symbols: 1-side bracket, 11-support seat, 12-support arm, 13-second Y-axis guide rail, 14-Y-axis rack, 2-rear chuck assembly, 21-slide plate, 22-rear chuck body, 23-Y-axis drive motor, 3-front chuck assembly, 4-centering follower mechanism, 41-L-shaped plate, 42-clamping block, 43-clamping drive cylinder, 44-second mounting plate, 45-position adjustment seat, 46-second lifting cylinder, 47-height adjustment screw, 5-variable wheel support mechanism, 51-first mounting plate, 52-first lifting cylinder, 53-receiving frame, 54-support shaft, 55-variable wheel, 56-locking structure, 6-laser cutting assembly, 61-bracket, 613-Z-axis guide rail, 614-Z-axis slider, 615-first Y-axis guide rail, 616-Y-axis slider, 617-X-axis guide rail, 618-X-axis slider, 62-Y-axis slide, 63-Y-axis drive mechanism, 631-cylinder bracket, 632-cylinder, 633-transmission plate, 64-X-axis slide, 65-X-axis drive mechanism, 66-A-axis turntable, 671-laser cutting head, 672-mounting frame, 68-Z-axis drive mechanism, 681-Z-axis drive motor, 682-first gear, 683-Z-axis rack, 691-dust cover, 692-side panel. DETAILED DESCRIPTION

[0026] The utility model provides a bevel pipe cutting machine. In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the protection scope of the utility model.

[0027] In this article, the X-axis direction is the left-right direction, the Y-axis direction is the front-back direction, and the Z-axis direction is the up-down direction.

[0028] See also Figure 1 and Figure 2 ,as well as Figures 5 - 8, the present utility model provides a bevel pipe cutting machine, which includes a side hanging frame 1, a rear chuck assembly 2 movably hung on the side hanging frame 1, a support seat 11 arranged at the front end of the side hanging frame 1, a front chuck assembly 3 fixedly arranged on the top of the support seat 11, a laser cutting assembly 6 arranged on the front end face of the support seat 11, a plurality of support arms 12 arranged side by side with the side hanging frame 1 in the front-back direction, and a centering follow-up mechanism 4 and / or a variable-diameter wheel support mechanism 5 arranged on the support arms 12. The centering follow-up mechanism 4 is used for clamping the pipe to make the pipe centered, and the variable-diameter wheel support mechanism 5 is used for supporting the pipe. The laser cutting assembly 6 includes a bracket 61 slidably arranged up and down on the front end face of the support seat 11, a Y-axis slide 62 slidably arranged back and forth on the top of the bracket 61, an X-axis slide 64 slidably arranged left and right on the Y-axis slide 62, an A-axis turntable 66 arranged on one side face of the X-axis slide 64, and a laser cutting head 671 arranged on the A-axis turntable 66 through a mounting frame 672. The bracket 61 moves vertically under the drive of a Z-axis drive mechanism 68. A Y-axis drive mechanism 63 for driving the Y-axis slide 62 to move back and forth is arranged on the bracket 61. The X-axis slide 64 moves left and right under the drive of an X-axis drive mechanism 65.

[0029] During actual operation, when the pipe to be processed is transported to the upper part of the centering follow-up mechanism 4 through the loading rack / crane lifting method / manual loading method, the centering follow-up mechanism 4 rises to clamp the pipe to make the pipe centered. Then, the rear chuck assembly 2 moves to clamp the tail of the pipe, and under the support of the variable-diameter wheel support mechanism 5, the pipe is pushed towards the front chuck assembly 3 so that the front chuck assembly 3 can clamp the head of the pipe. During normal laser pipe cutting, the fixedly arranged front chuck assembly 3 is located behind the laser cutting assembly 6. The front chuck assembly 3 and the rear chuck assembly 2 jointly drive the pipe to move forward and drive the pipe to rotate, so that the laser cutting head 671 emits laser downward to cut the pipe. Under the control of the A-axis turntable 66, the laser cutting head 671 rotates within the range of ±45° to change the cutting angle, so that the laser cutting head 671 can not only cut the pipe straight but also cut the bevel of the pipe, and combined with the drive of the X-axis drive mechanism 65 and the Z-axis drive mechanism 68, precise positioning and cutting of the laser cutting head 671 in the three-dimensional space are realized. When there is remaining tail material of the pipe, the A-axis turntable 66 controls the laser cutting head 671 to face vertically downward, and the Y-axis drive mechanism 63 drives the Y-axis slide 62 and the components on the Y-axis slide 62 to move close to the chuck, and then cut the remaining pipe straight, so as to reduce the amount of tail material.

[0030] Compared with the prior art, the laser cutting assembly 6 in the bevel cutting machine provided by the utility model has a multi-axis movement function, which greatly improves the flexibility of the pipe cutting machine when processing pipes of various lengths and diameters, and can perform straight cutting and bevel cutting operations more efficiently. Especially when cutting short tail materials, the Y-axis driving mechanism 63 moves the laser cutting head 671 on the Y-axis sliding seat 62 back and forth, breaking the limitation that the traditional laser cutting mechanism is fixed on the gantry crossbeam, thereby increasing the freedom degree of the cutting path, enabling the laser cutting assembly to more flexibly adapt to pipes of different lengths and shapes, reducing the generation of tail materials, and reducing material waste. In addition, the laser cutting assembly 6 of the bevel cutting machine replaces the traditional gantry crossbeam type cutting mechanism, not only reducing the overall height of the laser pipe cutting machine, simplifying the transportation and installation process of the equipment, but also enabling the front chuck assembly 3 to be fixedly arranged on the support base 11, enhancing the stability when processing heavy pipes, effectively reducing vibration, and ensuring the cutting accuracy and quality.

[0031] Specifically, as shown in Figures 5 - 8 As shown, the Y-axis sliding seat 62 is slidably arranged on the top of the support 61 through the first Y-axis guide rail 615 and the Y-axis slider 616. The Y-axis driving mechanism 63 includes a cylinder support 631 fixed on the support 61, a cylinder 632 arranged on the cylinder support 631, and a transmission plate 633 arranged at the bottom of the Y-axis sliding seat 62. The piston rod end of the cylinder 632 is drivingly connected to the transmission plate 633. The telescopic movement of the piston rod of the cylinder 632 can quickly move and switch the laser cutting head 671 between the normal cutting station and the tail material cutting station, with accurate positioning, which can significantly improve the working efficiency and processing accuracy.

[0032] Furthermore, two Z-axis guide rails 613 are arranged on the front end face of the support base 11, and Z-axis sliders 614 are arranged on the support 61 and are matched with the Z-axis guide rails 613. The Z-axis driving mechanism 68 includes a Z-axis driving motor 681 fixed on the support 61, a first gear 682 arranged at the output end of the Z-axis driving motor 681, and a Z-axis rack 683 vertically fixed on the front end face of the support base 11. The first gear 682 is in meshing transmission with the Z-axis rack 683. Compared with other transmission methods, the transmission of the grinding-level first gear 682 and the Z-axis rack 683 realizes high-precision rapid movement and can ensure the cutting quality.

[0033] Further, two X-axis guide rails 617 are provided on the Y-axis slide 62. The bottom surface of the X-axis slide 64 is provided with X-axis sliders 618 that cooperate with the X-axis guide rails 617. The X-axis drive mechanism 65 includes an X-axis drive motor fixed on the X-axis slide 64, a second gear provided on the output end of the X-axis drive motor, and an X-axis rack extending left and right on the Y-axis slide 62. The second gear meshes with the X-axis rack for transmission. The transmission between the second gear and the X-axis rack of the grinding grade ensures that the movement of the laser cutting head 671 in the X-axis direction has extremely high positioning accuracy, ensuring fine cutting and the quality of bevel cutting.

[0034] Preferably, dust-proof covers 691 for covering the first Y-axis guide rails 615 are provided on the front and rear sides of the Y-axis slide 62. The dust-proof covers 691 can effectively block dust, chips, and other impurities from entering between the first Y-axis guide rails 615 and the sliders, reducing the wear of these particles on the guide rails and sliders, avoiding movement blockage and accuracy decline caused by foreign object intrusion, and thus improving the reliability and cutting accuracy of the equipment.

[0035] Similarly, side enclosures 692 for covering the X-axis guide rails 617 and the X-axis sliders 618 are provided on the X-axis slide 64. The side enclosures 692 can effectively prevent external dust, chips, and other impurities from invading the area of the X-axis guide rails 617 and the X-axis sliders 618, reducing the wear and corrosion of these particles on the guide rails and sliders, maintaining the smoothness of the guide rails and the normal operation of the sliders, and thus improving the reliability and cutting accuracy of the equipment.

[0036] Specifically, as seen Figure 3 As shown, the variable-diameter wheel support mechanism 5 includes a first mounting plate body 51 provided on the support arm 12, a first lifting cylinder 52 arranged upward on the first mounting plate body 51, a receiving frame 53 drivingly connected to the first lifting cylinder 52, a support shaft 54 fixed on the receiving frame 53, a variable-diameter wheel 55 rotatably arranged on the support shaft 54, and a locking structure 56 for fixedly locking the variable-diameter wheel 55. In practical applications, the piston rod of the first lifting cylinder 52 has two states: fully extended or fully retracted. When the piston rod of the first lifting cylinder 52 extends, it drives the variable-diameter wheel 55 on the receiving frame 53 to rise to a set support height. According to the diameter of the pipe to be processed, the support contact surface of the variable-diameter wheel 55 is rotated and adjusted. After the adjustment is completed, the variable-diameter wheel 55 is locked by the locking structure 56. The variable-diameter wheel 55 can effectively support the pipe during cutting, reducing the swing of the pipe in the up, down, left, and right directions and improving the cutting accuracy. When the piston rod of the first lifting cylinder 52 retracts, the variable-diameter wheel 55 is lowered to avoid the lateral movement of the rear chuck assembly 2.

[0037] Specifically, see Figure 4As shown, the centering follow-up mechanism 4 includes an L-shaped plate 41, two clamping blocks 42 that are symmetric left and right and slidably arranged on the L-shaped plate 41, a clamping drive cylinder 43 for driving the two clamping blocks 42 to approach or separate from each other, and a lifting assembly for driving the L-shaped plate 41 to move up and down; the lifting assembly includes a second mounting plate body 44 fixed on the support arm 12, an adjustment seat 45 slidably arranged vertically on the second mounting plate body 44, and a second lifting cylinder 46 arranged upward on the adjustment seat 45. The end of the piston rod of the second lifting cylinder 46 is drivingly connected to the L-shaped plate 41. A height-adjusting screw 47 is arranged on the adjustment seat 45 and presses against the second mounting plate body 44. By turning the height-adjusting screw 47, the initial height of the adjustment seat 45 and the mechanism arranged on the adjustment seat 45 can be adjusted, and the adjustment is flexible.

[0038] When the second lifting cylinder 46 extends, it drives the clamping blocks 42 on the L-shaped plate 41 to rise as a whole; when the clamping drive cylinder 43 contracts, the two clamping blocks 42 approach each other, thereby clamping the pipe; by the extension of the clamping drive cylinder 43, the two clamping blocks 42 separate from each other, thereby loosening the pipe. The loosening or clamping of the pipe is realized by the extension or contraction of the clamping drive cylinder 43, and the follow-up clamping of the pipe is realized.

[0039] In this embodiment, three centering follow-up mechanisms 4 and two variable-diameter wheel support mechanisms 5 are configured. Of course, in order to improve the support and clamping effects of the pipe, multiple centering follow-up mechanisms 4 and variable-diameter wheel support mechanisms 5 can also be set. The present invention does not limit the number of the centering follow-up mechanisms 4 and the variable-diameter wheel support mechanisms 5. When the rear chuck assembly 2 moves forward, backward, or the rear chuck assembly 2 and the front chuck assembly 3 rotate, the centering follow-up mechanism 4 loosens the pipe, releases the clamping force in the left and right directions of the pipe, and enables the pipe to move forward or backward smoothly; when the laser cutting assembly 6 processes and cuts the pipe, the centering follow-up mechanism 4 clamps the pipe to achieve follow-up clamping. When the rear chuck assembly 2 continues to move forward, the control system controls the centering follow-up mechanism 4 or the variable-diameter wheel support mechanism 5 located in front of the rear chuck assembly 2 to descend to a height lower than that of the rear chuck assembly 2 to avoid the rear chuck assembly 2. By setting the centering follow-up mechanism 4, the pipe is clamped during the processing of the pipe, and the pipe is loosened when the pipe rotates, moves forward or backward, so as to achieve follow-up clamping; by setting the variable-diameter wheel support mechanism 5, the support of the pipe is realized; the above structure is simple, can ensure the clamping and support effects of the pipe, avoid the shaking of the pipe, and is beneficial to improving the processing accuracy of the pipe.

[0040] Preferably, a second Y-axis guide rail 13 and a Y-axis rack 14 are provided on the side hanging rack 1. The rear chuck assembly 2 includes a slide plate 21, a rear chuck body 22 disposed on the slide plate 21, a Y-axis driving motor 23 disposed on the slide plate 21, and a third gear disposed on the output end of the Y-axis driving motor 23. The third gear meshes with the Y-axis rack 14 for transmission. The back surface of the slide plate 21 is slidably connected to the second Y-axis guide rail 13 through a second Y-axis slider. Driven by the Y-axis driving motor 23, the rear chuck body 22 on the slide plate 21 can smoothly move horizontally.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0042] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection capable of mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] It can be understood that for those of ordinary skill in the art, equivalent replacements or changes can be made according to the technical solutions and the inventive concept of the present invention, and all such changes or replacements should fall within the protection scope of the present invention.

Claims

1. A bevel pipe cutting machine, characterized in that: The laser cutting device comprises a side hanger, a rear chuck assembly movably hung on the side hanger, a support seat arranged at the front end of the side hanger, a front chuck assembly fixedly mounted on the top of the support seat, a laser cutting assembly arranged on the front end surface of the support seat, a plurality of support arms arranged on one side of the side hanger in the front-to-back direction, and a centering follower mechanism and / or a diameter-changing wheel support mechanism arranged on the support arm, wherein the centering follower mechanism is used to clamp the pipe so as to center the pipe, and the diameter-changing wheel support mechanism is used to support the pipe, and the laser cutting assembly comprises a bracket slidably arranged on the front end surface of the support seat, a Y-axis slide seat slidably arranged on the top of the bracket, an X-axis slide seat slidably arranged on the Y-axis slide seat, an A-axis turntable arranged on one side of the X-axis slide seat, and a laser cutting head arranged on the A-axis turntable via a mounting frame; the bracket moves vertically under the drive of the Z-axis drive mechanism, and the bracket is provided with a Y-axis drive mechanism for driving the Y-axis slide seat to move forward and backward, and the X-axis slide seat moves left and right under the drive of the X-axis drive mechanism.

2. The bevel pipe cutting machine according to claim 1, characterized in that: The Y-axis slide is slidably arranged on the top of the bracket through the first Y-axis guide rail and the Y-axis slider. The Y-axis driving mechanism includes a cylinder bracket fixed on the bracket, a cylinder arranged on the cylinder bracket, and a transmission plate arranged at the bottom of the Y-axis slide. The piston rod end of the cylinder is drivingly connected to the transmission plate.

3. The bevel pipe cutting machine according to claim 1, characterized in that: Two Z-axis guide rails are arranged on the front end surface of the support seat, and a Z-axis slider matching the Z-axis guide rails is provided on the bracket. The Z-axis driving mechanism includes a Z-axis driving motor fixed on the bracket, a first gear arranged on the output end of the Z-axis driving motor, and a Z-axis rack vertically fixed on the front end surface of the support seat, and the first gear is meshed with the Z-axis rack for transmission.

4. The bevel pipe cutting machine according to claim 3, characterized in that: Two X-axis guide rails are arranged on the Y-axis slide, and an X-axis slider matched with the X-axis guide rails is arranged on the bottom surface of the X-axis slide. The X-axis driving mechanism includes an X-axis driving motor fixed on the X-axis slide, a second gear arranged on the output end of the X-axis driving motor, and an X-axis rack extending left and right on the Y-axis slide, and the second gear is meshed with the X-axis rack for transmission.

5. The bevel pipe cutting machine according to claim 4, characterized in that: Dust-proof covers for covering the first Y-axis guide rail are provided on the front and rear sides of the Y-axis slide, and side panels for covering the X-axis guide rail and the X-axis slider are provided on the X-axis slide.

6. The bevel pipe cutting machine according to claim 1, characterized in that: The variable diameter wheel supporting mechanism includes a first mounting plate body arranged on the support arm, a first lifting cylinder arranged upward on the first mounting plate body, a receiving frame drivingly connected to the first lifting cylinder, a support shaft fixed on the receiving frame, a variable diameter wheel rotatably arranged on the support shaft, and a locking structure for fixing and locking the variable diameter wheel.

7. The bevel pipe cutting machine according to claim 1, characterized in that: The centering follower mechanism includes an L-shaped plate, two clamping blocks symmetrically arranged on the L-shaped plate for sliding, a clamping driving cylinder for driving the two clamping blocks to move closer to or away from each other, and a lifting component for driving the L-shaped plate to move up and down.

8. The bevel pipe cutting machine according to claim 7, characterized in that: The lifting assembly includes a second mounting plate body fixed on the support arm, a positioning seat vertically slidably arranged on the second mounting plate body, and a second lifting cylinder upwardly arranged on the positioning seat, the piston rod end of the second lifting cylinder is drivingly connected to the L-shaped plate, and the positioning seat is provided with a height adjustment screw that presses against the second mounting plate body.

9. The bevel pipe cutting machine according to claim 1, characterized in that: The side bracket is provided with a second Y-axis guide rail and a Y-axis rack, and the rear chuck assembly includes a slide plate, a rear chuck body arranged on the slide plate, a Y-axis drive motor arranged on the slide plate, and a third gear arranged on the output end of the Y-axis drive motor, and the third gear is meshed with the Y-axis rack for transmission.

10. The bevel pipe cutting machine according to any one of claims 1 to 9, characterized in that: The deflection angle range of the laser cutting head driven by the A-axis turntable is ±45°.

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