Seamless steel tube cutting machine
By designing a seamless steel pipe cutting machine, the combination of power components and cutting racks is used to achieve uniform stress cutting of seamless steel pipes, solving the problems of uneven stress and large friction during the cutting process, improving the quality of the cut joints and reducing equipment costs.
Patent Information
- Application Number
- CN202510700044.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-28
- Publication Date
- 2025-07-04
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing seamless steel pipe cutting equipment has problems such as uneven stress, large friction, poor quality of cutting joints and high equipment costs during the cutting process.
A seamless steel pipe cutting machine is adopted, including a base, cutting assembly and pipe fixing assembly. The ring is driven by the power assembly, and the heavy block and the moving assembly rotate simultaneously. The cutting rack moves radially along the ring, achieving uniform stress cutting of the seamless steel pipe, reducing friction and reducing equipment costs.
It realizes uniform stress during the cutting process of seamless steel pipes, reduces friction, ensures the quality of the cut joints, reduces equipment costs, and facilitates cleaning of cutting chips and avoids deformation.
Smart Images
Figure CN120244059A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of metal cutting, and particularly to a seamless steel pipe cutting machine. Background Art
[0002] Steel pipes are often used to transport gases, liquids or powdered solids in industrial production. Steel pipes can be divided into seamless steel pipes and welded steel pipes according to the production method. Among them, seamless steel pipes are long steel bars with a hollow circular cross-section and no seams on the circumferential side. Seamless steel pipes have stronger compressive and bending resistance compared with welded steel pipes.
[0003] In the prior art, a circular saw or a laser cutting machine is mostly used to cut seamless steel pipes: The circular saw uses a high-speed rotating circular saw blade to perform a cross-sectional penetration cutting on the steel pipe. During the cutting process of the circular saw blade, the seamless steel pipe is unevenly stressed, so that the seamless steel pipe is prone to bending deformation at the cut, causing friction between the cut and the saw blade, and the cutting surface quality is poor; The laser cutting machine requires equipment such as a laser and a positioner, and the equipment cost is high. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to overcome the existing defects, and provide a seamless steel pipe cutting machine, in which the seamless steel pipe is evenly stressed during the cutting process, the cut is less affected by friction, the cutting quality of the cut is guaranteed, and the equipment cost is lower compared with the laser cutting machine.
[0005] To achieve the above object, the present invention provides the following technical solution: A seamless steel pipe cutting machine includes a base, a cutting assembly and a plurality of pipe fixing assemblies for fixing the seamless steel pipe are installed on the base. The cutting assembly includes a ring rotatably installed on the base, and a power assembly for driving the ring to rotate is installed on the base. Two moving assemblies are installed in the ring at equal angles around the axis of the ring, and a weight is arranged between the two moving assemblies.
[0006] The moving assembly includes a first elastic member, a connecting frame and a moving seat moving along the radial direction of the ring. A cutting rack is installed on the side of the moving seat corresponding to the axis of the ring, and the cutting rack is perpendicular to the axis of the ring. The two ends of the first elastic member are respectively fixedly connected with the moving seat and the ring. The two ends of the connecting frame are respectively rotatably connected with the weight and the moving seat.
[0007] Among them, the pipe fixing assembly fixes the seamless steel pipe, and the seamless steel pipe passes through the ring. The axis of the seamless steel pipe coincides with the axis of the ring. The power assembly drives the ring to rotate. The direction of the resultant force of the forces acting on the weight is radially outward along the ring. The distance between the weight and the inner wall of the ring becomes smaller, and the distance between the two cutting racks becomes smaller.
[0008] As a preferred technical solution of the present invention, a cutting rack slot is provided at a position on the side surface of the moving seat corresponding to the axis of the circular ring. The tooth back of the cutting rack is inserted into the cutting rack slot, and the cutting rack can slide along the cutting rack slot. A through hole communicating with the cutting rack slot is provided on the moving seat. The through hole and the cutting rack are arranged in parallel. A second elastic member is placed in the through hole, and a plugging member is installed on the through hole.
[0009] As a preferred technical solution of the present invention, a limiting hole is provided on the cutting rack along its length direction. A jack is provided on the moving seat at a position corresponding to the limiting hole. A limiting rod is installed in the jack, and one end of the limiting rod extends into the limiting hole of the cutting rack.
[0010] As a preferred technical solution of the present invention, a first shielding plate and a second shielding plate are respectively fixed on two end faces of the circular ring, and through holes for the seamless steel pipe to pass through are provided on both the first shielding plate and the second shielding plate.
[0011] As a preferred technical solution of the present invention, both the first shielding plate and the second shielding plate are slidably attached to the moving seat. Two support plates parallel to the moving direction of the moving seat are fixed on the moving seat, and the cutting rack is located between the two support plates. Both the first shielding plate and the second shielding plate are slidably attached to the support plates.
[0012] The support plate in one of the moving components is slidably attached to the support plate in the other moving component.
[0013] As a preferred technical solution of the present invention, the first shielding plate or the second shielding plate is made of a transparent material.
[0014] As a preferred technical solution of the present invention, a guide tube is fixed on the side surface of the moving seat corresponding to the inner wall of the circular ring. A sliding guide rod is provided in the guide tube, and one end of the guide rod is fixedly connected to the inner wall of the circular ring.
[0015] As a preferred technical solution of the present invention, one end of the limiting ejector rod is fixedly connected to a position on the side surface of the moving seat corresponding to the axis of the circular ring.
[0016] Among them, the length of the limiting ejector rod is greater than the outer diameter of the seamless steel pipe.
[0017] As a preferred technical solution of the present invention, the circular ring is a hollow gear. The power component includes a motor installed on the base. A gear is coaxially installed on the output shaft of the motor, and the gear meshes with the hollow gear.
[0018] As a preferred technical solution of the present invention, a housing covering the hollow gear is fixed on the base.
[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. For the seamless steel pipe cutting machine according to the example of the present invention, the power assembly drives the ring to rotate, and the heavy block and the moving assembly rotate synchronously with the ring. The heavy block drives the moving seat to move towards the seamless steel pipe through the connecting frame, and the distance between the two cutting racks becomes smaller: on the one hand, the two cutting racks rotate around the seamless steel pipe for cutting, making the force on the seamless steel pipe uniform during the cutting process, reducing the friction between the cut and the cutting rack, and ensuring the cutting quality of the cut; on the other hand, during the cutting of the seamless steel pipe by the two cutting racks, the two cutting racks cut along the tangent direction of the seamless steel pipe, forming a continuously deepening cutting groove at the position to be cut of the seamless steel pipe. The temperature rise at the position to be cut of the seamless steel pipe is slow, reducing the deformation of the seamless steel pipe caused by the temperature rise at the position to be cut; when the cutting rack just contacts the seamless steel pipe, the seamless steel pipe makes the cutting rack slide along the cutting rack slot, and the cutting rack presses the second elastic member to increase the elastic potential energy of the second elastic member, reducing the impact of the cutting rack on the seamless steel pipe when they just contact, and reducing the yaw of the cutting rack, avoiding the formation of irregular cuts on the seamless steel pipe.
[0020] 2. For the seamless steel pipe cutting machine according to the example of the present invention, the cooperation of the first baffle, the second baffle, the support plate and the moving seat makes the cutting chips fall on the support plate or the moving seat, facilitating the cleaning of the cutting chips by the staff.
[0021] 3. For the seamless steel pipe cutting machine according to the example of the present invention, the cooperation of the first baffle, the second baffle, the support plate and the moving seat makes the heavy block and the moving seat located in a closed space, avoiding the influence of cutting chips on the movement of the heavy block and the moving seat.
[0022] 4. For the seamless steel pipe cutting machine according to the example of the present invention, after the cutting rack finishes cutting the seamless steel pipe, the limit ejector rod is located between the two moving seats, avoiding the collision between the moving seat and the seamless steel pipe.
[0023] 5. For the seamless steel pipe cutting machine according to the example of the present invention, the cutting rack cuts along the tangent direction of the seamless steel pipe, forming a continuously deepening cutting groove at the position to be cut of the seamless steel pipe, with less cutting chips entering the inner cavity of the seamless steel pipe, facilitating the cleaning of the inner cavity of the seamless steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 is a schematic structural diagram of one perspective of the present invention; Figure 2 is a schematic structural diagram of another perspective of the present invention; Figure 3 is an exploded structural diagram of the cutting assembly of the present invention; Figure 4 is Figure 3 an enlarged schematic diagram of the structure at A of Figure 5Schematic diagram of the partial sectional structure of the moving seat of the present invention.
[0025] In the figure: 1 pipe fixing component, 2 base, 3 cutting component, 310 first baffle, 320 moving component, 321 moving seat, 322 cutting rack, 323 first elastic member, 324 guide pipe, 325 support plate, 326 connecting frame, 327 second elastic member, 328 blocking member, 329 limiting rod, 330 second baffle, 340 motor, 350 gear, 360 weight, 370 ring, 4 limiting ejector rod, 5 housing. Detailed implementation manners
[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0027] Embodiment 1: Please refer to Figures 1-4 , this embodiment discloses a seamless steel pipe cutting machine, including a base 2, a cutting component 3 and at least two pipe fixing components 1 that can fix seamless steel pipes are installed on the base 2. The cutting component 3 includes a ring 370 rotatably installed on the base 2. A power component that can drive the ring 370 to rotate is installed on the base 2. Two moving components 320 are installed equiangularly around the axis of the ring 370 inside the ring 370. A weight 360 is provided between the two moving components 320.
[0028] The moving component 320 includes a first elastic member 323, a connecting frame 326 and a moving seat 321 that moves radially along the ring 370. A cutting rack 322 is installed on the side of the moving seat 321 corresponding to the axis of the ring 370. The cutting rack 322 is perpendicular to the axis of the ring 370. The two ends of the first elastic member 323 are respectively fixedly connected to the moving seat 321 and the ring 370. The two ends of the connecting frame 326 are respectively connected to the weight 360 and the moving seat 321 through a hinge or a hinge seat.
[0029] The working process and principle of this embodiment are: The staff uses the pipe fixing component 1 to fix the seamless steel pipe, and the seamless steel pipe passes through the ring 370, and the axis of the seamless steel pipe coincides with the axis of the ring 370. The staff uses the power component to drive the ring 370 to rotate, and the weight block 360 and the moving component 320 rotate synchronously with the ring 370. The direction of the resultant force of the weight block 360 is radially outward along the ring 370, and the weight block 360 moves toward the inner wall of the ring 370. The distance between the weight block 360 and the inner wall of the ring 370 becomes smaller. The weight block 360 drives the moving seat 321 to move toward the seamless steel pipe through the connecting frame 326, and the distance between the two cutting racks 322 becomes smaller, and the elastic potential energy of the first elastic member 323 increases.
[0030] The two rotating cutting racks 322 are in contact with the position to be cut of the seamless steel pipe, and the two cutting racks 322 rotate around the seamless steel pipe, and the cutting racks 322 cut the seamless steel pipe. After the cutting of the seamless steel pipe is completed, the staff stops the power component from driving the ring 370 to rotate or the staff slows down the speed of the power component driving the ring 370 to rotate, and the first elastic member 323 drives the cutting rack 322 away from the cutting seam of the seamless steel pipe through the moving seat 321.
[0031] The two cutting racks 322 rotate around the seamless steel pipe for cutting, so that the seamless steel pipe is subjected to uniform force during cutting, and friction between the cut seam and the cutting racks 322 is avoided after the seamless steel pipe is subjected to force, thereby ensuring the cutting quality of the cut seam.
[0032] During the cutting process of the seamless steel pipe by the two cutting racks 322, the two cutting racks 322 cut along the tangent direction of the seamless steel pipe, so that a continuously deepening cutting groove is formed at the cutting position of the seamless steel pipe, and the temperature of the cutting position of the seamless steel pipe rises slowly, thereby reducing the deformation of the cutting position of the seamless steel pipe caused by the temperature increase, and reducing the cutting chips entering the inner cavity of the seamless steel pipe, making it easy to clean the inner cavity of the seamless steel pipe.
[0033] Preferably, the tube fixing assembly 1 is a three-jaw centering chuck or a V-shaped frame, the ring 370 is installed on the base 2 through a bearing seat, the first elastic member 323 is a spring or an elastic belt, a first guide rail is fixed on the ring 370, and a first guide slide hole adapted to the guide rail is provided on the movable seat 321, so that the movable seat 321 can move radially along the ring 370.
[0034] Preferably, the power assembly includes a motor and a driving wheel, the output shaft of the motor drives the ring 370 to rotate via the driving wheel, and the center of gravity of the cutting assembly 3 is located on the axis of the ring 370.
[0035] Furthermore, the cutting assembly 3 is located between two adjacent pipe fixing assemblies 1 .
[0036] Embodiment 2: like Figure 4 and Figure 5As shown in the figure, this embodiment discloses a seamless steel pipe cutting machine, whose structure is substantially the same as that of the first embodiment. The difference is that in this embodiment, a cutting rack slot is opened at a position on the side of the moving seat 321 corresponding to the axis of the circular ring 370. The tooth back of the cutting rack 322 is inserted into the cutting rack slot, and the cutting rack 322 can slide along the cutting rack slot. A through hole communicating with the cutting rack slot is opened on the moving seat 321. The through hole and the cutting rack 322 are arranged in parallel. A second elastic member 327 is placed in the through hole. The second elastic member 327 extends into the cutting rack slot. A sealing member 328 is installed on the through hole. The sealing member 328 is a sealing block, a bolt or an adhesive block. The sealing member 328 makes the second elastic member 327 located in the through hole.
[0037] The working process and principle of this embodiment are as follows: When the cutting rack 322 just contacts the seamless steel pipe, the seamless steel pipe makes the cutting rack 322 slide along the cutting rack slot. The cutting rack 322 presses the second elastic member 327 to increase the elastic potential energy of the second elastic member 327, reduce the impact of the cutting rack 322 on the seamless steel pipe when the cutting rack 322 just contacts the seamless steel pipe, and reduce the yaw of the cutting rack 322, avoiding the formation of irregular cuts on the seamless steel pipe by the cutting rack 322.
[0038] Preferably, a magnet is provided on the moving seat 321, and the magnet magnetically limits the cutting rack 322.
[0039] Preferably, the second elastic member 327 is a spring or an elastic rod. A clamping groove is opened at a position on the cutting rack 322 corresponding to the second elastic member 327. One end of the second elastic member 327 extends into the clamping groove to prevent the cutting rack 322 from disengaging from the cutting rack slot.
[0040] Furthermore, an extension portion extends along the length direction of the cutting rack 322 on the part of the cutting rack 322 extending out of the cutting rack slot. The extension portion prevents cutting chips from entering the cutting rack slot during the sliding of the cutting rack 322 along the cutting rack slot.
[0041] Embodiment Three: As Figure 5 shown in the figure, this embodiment discloses a seamless steel pipe cutting machine, whose structure is substantially the same as that of the second embodiment. The difference is that in this embodiment, a limiting hole is opened on the cutting rack 322 along its length direction. A jack is opened at a position on the moving seat 321 corresponding to the limiting hole. A limiting rod 329 is installed in the jack. One end of the limiting rod 329 extends into the limiting hole of the cutting rack 322. The limiting rod 329 prevents the cutting rack 322 from disengaging from the cutting rack slot.
[0042] Preferably, the limiting rod 329 is a straight rod, and the friction between the straight rod and the limiting hole fixes the straight rod in the limiting hole; or the limiting rod 329 is a screw, and the inner wall of the limiting hole is provided with internal threads adapted to the screw, and the screw is rotated and inserted into the limiting hole.
[0043] Embodiment 4: As Figure 3 shown, this embodiment discloses a seamless steel pipe cutting machine, whose structure is substantially the same as that of Embodiment 2. The difference is that in this embodiment, a first shielding plate 310 and a second shielding plate 330 are respectively fixed on two end faces of the ring 370, and through holes for the seamless steel pipe to pass through are provided on both the first shielding plate 310 and the second shielding plate 330.
[0044] The working process and principle of this embodiment are as follows: The first shielding plate 310 and the second shielding plate 330 shield the cutting assembly 3 inside the ring 370, preventing external objects or personnel from contacting the rotating cutting assembly 3 and improving the safety of this seamless steel pipe cutting machine.
[0045] Preferably, a second guide rail is fixed on the ring 370 or the first shielding plate 310, and a second guiding sliding hole adapted to the guide rail is provided on the weight 360, so that the weight 360 can move radially along the ring 370.
[0046] Embodiment 5: As Figure 3 and Figure 4 shown, this embodiment discloses a seamless steel pipe cutting machine, whose structure is substantially the same as that of Embodiment 4. The difference is that in this embodiment, both the first shielding plate 310 and the second shielding plate 330 are in sliding fit with the moving seat 321. Two support plates 325 parallel to the moving direction of the moving seat 321 are fixed on the moving seat 321, and the cutting rack 322 is located between the two support plates 325. Both the first shielding plate 310 and the second shielding plate 330 are in sliding fit with the support plates 325.
[0047] The support plate 325 in one moving assembly 320 and the support plate 325 in the other moving assembly 320 are in sliding fit.
[0048] The working process and principle of this embodiment are as follows: The cooperation of the first shielding plate 310, the second shielding plate 330, the support plates 325 and the moving seat 321 makes the weight 360 and the moving seat 321 located in a closed space, preventing cutting chips from affecting the movement of the weight 360 and the moving seat 321.
[0049] The cooperation of the first shielding plate 310, the second shielding plate 330, the support plates 325 and the moving seat 321 makes the cutting chips fall on the support plates 325 or the moving seat 321, facilitating the cleaning of the cutting chips by the staff.
[0050] Preferably, the second baffle 330 is mounted on the base 2 through a bearing block.
[0051] Example Six: As Figure 3 shown, this example discloses a seamless steel pipe cutting machine, whose structure is substantially the same as that of Example Four. The difference is that in this example, the first baffle 310 or the second baffle 330 is made of a transparent material, which is convenient for observing the wear or damage of each component of the cutting assembly 3.
[0052] Example Seven: As Figure 4 shown, this example discloses a seamless steel pipe cutting machine, whose structure is substantially the same as that of Example One. The difference is that in this example, a guide pipe 324 is fixed at the position on the side surface of the moving seat 321 corresponding to the inner wall of the ring 370. A sliding guide rod is provided in the guide pipe 324, and one end of the guide rod is fixedly connected to the inner wall of the ring 370.
[0053] The working process and principle of this example are: The guide pipe 324 can slide along the guide rod, making the movement of the moving seat 321 along the radial direction of the ring 370 stable.
[0054] Example Eight: As Figure 3 and Figure 4 shown, this example discloses a seamless steel pipe cutting machine, whose structure is substantially the same as that of Example One. The difference is that in this example, one end of a limit ejector rod 4 is fixedly connected to the position on the side surface of one of the moving seats 321 corresponding to the axis of the ring 370.
[0055] Among them, the length of the limit ejector rod 4 is greater than the outer diameter of the seamless steel pipe.
[0056] The working process and principle of this example are: During the cutting of the seamless steel pipe by the cutting rack 322, the unfixed end of the limit ejector rod does not contact the moving seat 321. After the cutting of the seamless steel pipe by the cutting rack 322 is completed, the limit ejector rod 4 makes the two moving seats 321 not contact the seamless steel pipe, avoiding the collision between the moving seat 321 and the seamless steel pipe.
[0057] Example Nine: As Figure 1 、 Figure 2 and Figure 3As shown in the figure, this embodiment discloses a seamless steel pipe cutting machine, whose structure is substantially the same as that of the first embodiment. The difference is that in this embodiment, the circular ring 370 is a hollow gear, and the power assembly includes a motor 340 fixedly installed on the base 2. A gear 350 is coaxially and fixedly installed on the output shaft of the motor 340. The gear 350 meshes with the hollow gear. The motor 340 is electrically connected to an external power source, and the external power source supplies power to the motor 340.
[0058] Preferably, a housing 5 covering the hollow gear is fixed on the base 2, and the housing 5 improves the safety of this seamless steel pipe cutting machine.
[0059] The motor 340 used in this embodiment is a DC motor or an AC asynchronous motor. The motor 340 used in the present invention is a common electronic component in the prior art, and its working mode and circuit structure are well-known technologies, which will not be elaborated here.
[0060] The working process and principle of this embodiment are as follows: The motor 340 drives the cutting assembly 3 through the gear 350 and the hollow gear, and it is convenient to control the rotation speed of the cutting rack 322.
[0061] Furthermore, the staff adjusts the magnitude of the extrusion force between the cutting rack 322 and the seamless steel pipe by adjusting the weight of the weight 360 or the rotation speed of the circular ring 370.
[0062] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention.
Claims
1. A seamless steel pipe cutting machine, comprising a base (2), characterized in that: A cutting assembly (3) and a plurality of pipe fixing assemblies (1) for fixing seamless steel pipes are installed on the base (2). The cutting assembly (3) includes a ring (370) rotatably installed on the base (2). A power assembly for driving the ring (370) to rotate is installed on the base (2). Two moving assemblies (320) are installed in the ring (370) at equal angles around the axis of the ring (370). A weight (360) is arranged between the two moving assemblies (320). The moving assembly (320) includes a first elastic member (323), a connecting frame (326), and a moving seat (321) that moves radially along the ring (370). A cutting rack (322) is installed on the side of the moving seat (321) corresponding to the axis of the ring (370). The cutting rack (322) is perpendicular to the axis of the ring (370). The two ends of the first elastic member (323) are respectively fixedly connected to the moving seat (321) and the ring (370). The two ends of the connecting frame (326) are respectively rotatably connected to the weight (360) and the moving seat (321). Among them, the pipe fixing assembly (1) fixes the seamless steel pipe, and the seamless steel pipe passes through the ring (370). The axis of the seamless steel pipe coincides with the axis of the ring (370). The power assembly drives the ring (370) to rotate. The direction of the resultant force acting on the weight (360) is radially outward along the ring (370). The distance between the weight (360) and the inner wall of the ring (370) becomes smaller, and the distance between the two cutting racks (322) becomes smaller.
2. The seamless steel pipe cutting machine according to claim 1, characterized in that: A cutting rack slot is formed in the side of the moving seat (321) corresponding to the axis of the ring (370). The tooth back of the cutting rack (322) is inserted into the cutting rack slot, and the cutting rack (322) can slide along the cutting rack slot. A through hole communicating with the cutting rack slot is formed in the moving seat (321). The through hole is parallel to the cutting rack (322). A second elastic member (327) is placed in the through hole. A plugging member (328) is installed on the through hole.
3. The seamless steel pipe cutting machine according to claim 2, characterized in that: A limiting hole is formed in the cutting rack (322) along its length direction. A jack corresponding to the limiting hole is formed in the moving seat (321). A limiting rod (329) is installed in the jack. One end of the limiting rod (329) extends into the limiting hole of the cutting rack (322).
4. The seamless steel pipe cutting machine according to claim 2, characterized in that: First shielding plates (310) and second shielding plates (330) are respectively fixed to the two end faces of the ring (370). Through holes for the seamless steel pipe to pass through are formed in both the first shielding plates (310) and the second shielding plates (330).
5. The seamless steel pipe cutting machine according to claim 4, characterized in that: Both the first shielding plate (310) and the second shielding plate (330) are in sliding fit with the moving seat (321). Two support plates (325) parallel to the moving direction of the moving seat (321) are fixed to the moving seat (321). The cutting rack (322) is located between the two support plates (325). Both the first shielding plate (310) and the second shielding plate (330) are in sliding fit with the support plates (325). The support plate (325) in one of the moving components (320) is in sliding contact with the support plate (325) in the other moving component (320).
6. The seamless steel pipe cutting machine according to claim 4, wherein: The first baffle (310) or the second baffle (330) is made of a transparent material.
7. The seamless steel pipe cutting machine according to claim 1, wherein: A guide tube (324) is fixed at a position on the side of the moving seat (321) corresponding to the inner wall of the ring (370). A sliding guide rod is provided in the guide tube (324), and one end of the guide rod is fixedly connected to the inner wall of the ring (370).
8. The seamless steel pipe cutting machine according to claim 1, wherein: One end of a limit ejector rod (4) is fixedly connected to a position on the side of one of the moving seats (321) corresponding to the axis of the ring (370); Among them, the length of the limit ejector rod (4) is greater than the outer diameter of the seamless steel pipe.
9. The seamless steel pipe cutting machine according to claim 1, wherein: The ring (370) is a hollow gear. The power assembly includes a motor (340) installed on the base (2). A gear (350) is coaxially installed on the output shaft of the motor (340), and the gear (350) meshes with the hollow gear.
10. The seamless steel pipe cutting machine according to claim 9, characterized in that: A housing (5) covering the hollow gear is fixed on the base (2).