Thin-wall stainless steel pipe cutting device

Abstract

The present invention relates to the field of pipe cutting technology, and discloses a thin-walled stainless steel pipe cutting device, which solves the problem that the existing thin-walled stainless steel pipe cutting device has a long rod core assembly method and structure, which is inconvenient in the loading and unloading process of the steel pipe, and the long rod core is easy to shake at one end, which also affects the shearing quality. When the steel pipe is pushed by the pushing assembly, it will actively be sleeved on the outer surface of the inner rod core mechanism on one side of the machine, and there is no need to sleeve the steel pipe on the rod core mechanism in advance, thereby avoiding the cumbersome loading process, and because the length of the support rod only needs to be greater than the finished pipe, the length of the rod core mechanism can be greatly reduced, which further improves the stability of the support rod with the inner support block at one end, thereby effectively ensuring the stability of the inner support block in cooperating with the cutter disc and the pulley assembly to shear the steel pipe.

Description

Technical Field

[0001] The invention relates to the technical field of pipe cutting, in particular to a thin-wall stainless steel pipe cutting device. Background Art

[0002] During the processing of thin-walled stainless steel pipes, cold shearing is typically performed to ensure a smooth end surface, minimize burrs, and maintain the original properties of the material. Existing cold shearing processes primarily utilize a cutting device consisting of a cutter disc and a rod core. Specifically, the rod core is inserted into the pipe to provide support for the pipe wall, while the cutter disc and the end edges of the rod core interact to form a shearing mechanism. This structure effectively ensures the roundness of the cut edge of the thin-walled stainless steel pipe during shearing, resulting in high-quality shearing results.

[0003] However, if Figure 10 As shown, this existing pipe cutting method has many disadvantages in actual application. First, one end of the rod core is fixedly assembled, and the other end cooperates with the cutter disc. During operation, the steel pipe needs to be pre-put on the rod core, and then the steel pipe is intermittently pushed toward the cutter disc with the help of a pushing structure to achieve continuous shearing of the steel pipe. This operation method brings many inconveniences in the loading and unloading links, seriously affecting production efficiency. Secondly, the length of the rod core needs to match the steel pipe, and its structure is relatively long. During the shearing process, the end used to cooperate with the shearing is prone to shaking, which in turn affects the roundness of the incision and causes unstable shearing quality. Therefore, the existing cold-cut thin-walled stainless steel pipe cutting process is in urgent need of improvement to overcome the above problems and improve production efficiency and shearing quality. Summary of the Invention

[0004] The purpose of the present invention is to provide a thin-walled stainless steel pipe cutting device, which solves the problem that the existing thin-walled stainless steel pipe cutting device has a long rod core assembly method and structure, which causes inconvenience in the loading and unloading of steel pipes, and one end of the long rod core is prone to shaking, which also affects the shearing quality.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a thin-walled stainless steel pipe cutting device, comprising a machine platform, a double-station slide module and a propulsion assembly are provided on the machine platform, the propulsion assembly pushes the steel pipe to the middle of the two stations of the double-station slide module, the two stations of the double-station slide module are respectively provided with a motor and a pulley group, the output end of the motor is provided with a cutter disc, the machine platform is provided with a support mechanism on the side away from the steel pipe, and a rod core mechanism is provided on one side of the support mechanism in the same axial direction as the steel pipe. When the steel pipe is pushed, it is actively sleeved on the outer surface of the rod core mechanism, and then the double-station slide module drives the cutter disc and the pulley group to move closer, and cooperates with the rod core mechanism to form a shearing structure to shear the steel pipe.

[0006] As a further description of the above technical solution: the support mechanism includes an assembly plate, which is rotatably assembled on one side of the machine through fixed frames on both sides, the rod core mechanism is assembled on one side of the assembly plate, and the fixed frame is equipped with a telescopic member 2 for pulling the assembly plate to rotate.

[0007] As a further description of the above technical solution: one end of the rod core mechanism is movably assembled on the assembly plate, and the assembly plate is equipped with a telescopic component 1 that pushes the rod core mechanism to move, and the output end of the telescopic component 1 is fixedly connected to one end of the truncated cone sleeve.

[0008] As a further description of the above technical solution: the rod core mechanism includes a support rod, one end of which is connected to a columnar inner support block, the diameter of the inner support block corresponds to the inner diameter of the steel pipe, and the inner support block is provided with a shearing portion away from one end of the support rod.

[0009] As a further description of the above technical solution: an extension column is provided on the side of the inner support block close to the shearing portion, and a sliding sleeve on the surface of the extension column is provided with a frustum sleeve, the bottom diameter of the frustum sleeve is consistent with the outer diameter of the inner support block, and the dome is arranged on the side away from the inner support block.

[0010] As a further description of the above technical solution: a circular groove for engaging the shearing part is provided on one side of the truncated cone sleeve, and a spring for pushing the truncated cone sleeve away from the inner support block is also provided on the surface of the extension column. A limiting nut for limiting the truncated cone sleeve is provided at the outer end of the extension column. Under normal circumstances, the spring pushes the truncated cone sleeve so that the shearing part is exposed.

[0011] As a further description of the above technical solution: a cylindrical portion is provided on one side of the circular bottom of the truncated cone sleeve, and the outer diameter of the cylindrical portion is consistent with the outer diameter of the inner supporting block.

[0012] As a further description of the above technical solution: the surface movable sleeve of the support rod is provided with a limit sleeve, and a bolt is threadedly connected to one side of the limit sleeve. One end of the bolt passes through the limit sleeve and rests on the surface of the support rod to fix the position of the limit sleeve on the support rod.

[0013] As a further description of the above technical solution: the arc surface of the support rod is provided with an opening groove 1 on the upper side along the length direction, and a guide groove is provided on the side; the upper side of the limit sleeve is provided with an opening groove 2 corresponding to the opening groove 1; the inner wall of the limit sleeve is fixedly provided with a slider that slides into the guide groove at the position corresponding to the guide groove.

[0014] As a further description of the above technical solution: a guide rail is provided above the opening groove 1, the guide rail is fixed on one side of the assembly plate, a movable block is provided on the guide rail, a push block is fixedly connected to the lower side of the movable block, and the push block moves inside the opening groove 1.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0016] When the steel pipe is pushed by the pushing assembly, it will actively be put on the outer surface of the inner rod core mechanism on one side of the machine. There is no need to put the steel pipe on the rod core mechanism in advance, thus avoiding the cumbersome loading process. Moreover, since the length of the support rod only needs to be greater than the finished pipe, the length of the rod core mechanism can be greatly reduced, which further improves the stability of the support rod with the inner support block at one end, thereby effectively ensuring the stability of the inner support block, the cutter disc, and the pulley group in shearing the steel pipe. At the same time, the cut finished pipe is put on the support rod, which directly avoids the situation of the finished pipe flying around, ensuring the safety of the production process and the appearance quality of the finished pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the overall top view of the structure of the present invention;

[0019] Figure 3 It is a schematic diagram of the machine structure of the present invention;

[0020] Figure 4 For the present invention Figure 3 Schematic diagram of A in the middle;

[0021] Figure 5 It is a schematic structural diagram of the rod core mechanism and the support mechanism of the present invention;

[0022] Figure 6 Schematic cross-sectional view of the rod core mechanism of the present invention;

[0023] Figure 7 This is a schematic diagram of the steel pipe of the present invention being inserted into the surface of the rod core mechanism;

[0024] Figure 8 For the present invention Figure 7 Schematic diagram of B in the middle;

[0025] Figure 9 This is a schematic diagram of a state in which the support mechanism of the present invention is tilted so that one end of the rod core mechanism is downward;

[0026] Figure 10 The figure is a schematic diagram of the structure of the existing rod core 1 assembled on the machine.

[0027] In the figure: 10, machine; 11, double-station slide module; 12, control unit; 13, cutter head; 131, motor; 14, pulley block; 15, propulsion assembly; 20, rod core mechanism; 21, support rod; 211, guide groove; 212, opening groove one; 22, inner support block; 221, shearing part; 222, extension column; 223, limiting nut; 23, frustum sleeve; 231, spring; 232, columnar part; 24, limiting sleeve; 241, opening groove two; 25, push block; 30, steel pipe; 31, finished pipe; 40, support mechanism; 41, assembly plate; 42, telescopic member one; 43, fixing frame; 44, telescopic member two; 20a, rod core one; 21a, inner support block one. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0030] Combine Figure 10 and Figure 1 In the existing pipe cutting device, the length of the rod core 20a needs to be slightly longer than the length of the steel pipe 30 so that one end of the rod core 20a can be fixedly assembled and the steel pipe 30 can be sleeved on the outer surface. The end of the rod core 20a away from the fixed end is provided with an inner support block 21a, which matches the inner diameter of the steel pipe 30. The inner support block 21a cooperates with the close cutter disc 13 and the pulley assembly 14 to shear the steel pipe 30 to form a finished pipe 31, and then cooperates with the intermittent propulsion of the propulsion component 15 to achieve continuous shearing. In actual use, this device will face the problem of cumbersome loading of the steel pipe 30. Secondly, because the length of the rod core needs to match the steel pipe 30, its structure is relatively long. During the shearing process, the end used for shearing, that is, the end with the inner support block 21a, is prone to shaking, which in turn affects the roundness of the incision and easily leads to unstable shearing quality.

[0031] Combine Figures 1-10 In order to solve the above problems, the present invention provides a thin-walled stainless steel pipe cutting device, including a machine platform 10, on which a double-station slide module 11 and a propulsion assembly 15 are provided. The two movable stations on the double-station slide module 11 are controlled by electrical signals from a control unit 12 on one side of the machine platform 10, and approach or separate from each other in a plane.

[0032] The propulsion assembly 15 consists of a roller, a motor that drives the roller, and a lifting mechanism mounted below the motor. The lifting mechanism is preferably an electrically controlled lifting platform that precisely controls the roller's movement. The roller is preferably made of a flexible material such as rubber. This design not only creates a larger area of ​​frictional contact with the steel pipe 30, thereby more effectively moving the steel pipe 30, but also prevents deformation of the steel pipe 30 caused by hard squeezing.

[0033] During operation, the lifting mechanism first controls the rollers to descend, bringing them into contact with the steel pipe 30. The rotating rollers then use friction to push the steel pipe 30 to one side, accurately placing it between the two stations of the dual-station slide module 11. Throughout this process, motor 1 and the lifting mechanism are controlled by electrical signals from the control unit 12, ensuring precise and automated operation.

[0034] The two stations of the double-station slide module 11 are respectively provided with a motor 131 and a pulley group 14, wherein the output end of the motor 131 is connected to the cutter disc 13. A support mechanism 40 is provided on the side of the machine 10 away from the steel pipe 30, and a rod core mechanism 20 is provided on one side of the support mechanism 40 in the same axial direction as the steel pipe 30. The rod core mechanism 20 includes a support rod 21, the length of which only needs to be greater than the finished pipe 31. One end of the support rod 21 is connected to a columnar inner support block 22, which is made of a metal material with hardness and has a diameter that matches the inner diameter of the steel pipe 30. When the steel pipe 30 is sleeved on the outer surface of the inner support block 22, the inner support block 22 can form a stable support for the inner wall of the steel pipe 30.

[0035] The inner support block 22 is provided with a shearing portion 221 at one end away from the support rod 21. The shearing portion 221 is an open circular groove with a vertical side surface and a right angle to the edge connected to the curved surface of the inner support block 22. When the cutter disc 13 and the pulley block 14 are pushed closer to each other by the double-station slide module 11, the pulley block 14 will support the outer surface of the steel pipe 30 corresponding to the position of the inner support block 22, while the cutter disc 13 and the side of the shearing portion 221 are in an offset state and cut into the inner side of the shearing portion 221, that is, the blade of the cutter disc 13 and the outer edge of the side of the shearing portion 221 form a shearing structure. When the motor 131 controls the cutter disc 13 to rotate, the steel pipe 30 will also rotate under the action of the shear force. After the steel pipe 30 rotates one circle, it has completed its shearing, and the finished pipe 31 after shearing will be sleeved on the outer surface of the inner support block 22.

[0036] When the steel tube 30 is pushed by the push assembly 15, it automatically slides onto the outer surface of the inner support block 22. Compared to the existing rod core 20a, there is no need to pre-slide the steel tube 30 onto the rod core 20a, thus avoiding the cumbersome loading process. After the steel tube 30 has reached the predetermined length on the surface of the support rod 21, the dual-station slide module 11 is driven to control the cutter head 13 and the pulley assembly 14 to move closer, forming a shearing mechanism with the support rod 21 to complete the shearing of the steel tube 30.

[0037] In addition, since the length of the support rod 21 only needs to be greater than the finished pipe 31, the length of the rod core mechanism 20 can be greatly reduced, which further improves the stability of the support rod 21 with the inner support block 22 at one end, thereby effectively ensuring the stability of the inner support block 22 in cooperating with the cutter disc 13 and the pulley group 14 to shear the steel pipe 30.

[0038] It is worth noting that compared to the existing rod core 20a technology, when the finished tube 31 is cut, it often flies out of position due to the force exerted by the rotating cutter head 13. Due to the sharp edges of the finished tube 31, this phenomenon not only poses a significant safety hazard, but also easily deforms when the finished tube 31 strikes external structures during the ejection process, thus affecting product quality. In contrast, in this device, the cut finished tube 31 is sheathed on the support rod 21, directly preventing the finished tube 31 from flying around, ensuring both production safety and the appearance quality of the finished tube 31.

[0039] like Figure 1-Figure 5 、 Figure 9 As shown, the support mechanism 40 includes an assembly plate 41, which is rotatably mounted on one side of the machine platform 10 via fixed frames 43 on both sides. The rod core mechanism 20 is mounted on one side of the assembly plate 41, and the fixed frame 43 is equipped with a telescopic member 44 for pulling the assembly plate 41 to rotate. Figure 9 When the telescopic member 2 44 pulls the assembly plate 41 to rotate it around the rotation axis connected to the fixing frame 43, the outer end of the rod core mechanism 20 will rotate downward, thereby facilitating the steel pipe 30 to automatically fall off from the rod core mechanism 20.

[0040] One end of the rod-core mechanism 20 is movably mounted on the assembly plate 41. The support rod 21 is preferably movably mounted via a linear bearing to ensure high linearity during its linear movement. Mounted on the assembly plate 41 is a telescopic member 42 that propels the rod-core mechanism 20. The output end of the telescopic member 42 is fixedly connected to one end of the truncated cone sleeve 23. By controlling the telescopic member 42 to push one end of the support rod 21, the rod-core mechanism 20 can be moved away from the steel tube 30, thereby preventing one end of the rod-core mechanism 20 from being positioned inside the steel tube 30 and interfering with the assembly plate 41's control of the rod-core mechanism 20's rotation.

[0041] The first telescopic member 42 and the second telescopic member 44 are preferably electric cylinders, which are both electrically connected to the control unit 12 and their working processes are controlled by the control unit 12 .

[0042] The specific operating process is as follows: After the cutterhead 13 completes cutting the steel tube 30, the telescopic member 1 42 first controls the rod core mechanism 20 to move with the finished tube 31 away from the steel tube 30, ensuring that one end of the rod core mechanism 20 is completely clear of the inside of the steel tube 30. Then, the telescopic member 2 44 is controlled to pull the assembly plate 41 to rotate, causing the end of the rod core mechanism 20 carrying the finished tube 31 to point downward. Subsequently, the finished tube 31 automatically falls off the surface of the rod core mechanism 20 under the action of gravity, achieving automatic unloading.

[0043] like Figures 5 to 8 As shown, the inner support block 22 is provided with an extension column 222 on the side near the shear portion 221. A truncated cone sleeve 23 is slidably mounted on the surface of the extension column 222. The bottom diameter of the truncated cone sleeve 23 matches the outer diameter of the inner support block 22, and its top is located on the side away from the inner support block 22. The presence of the truncated cone sleeve 23 facilitates the guidance of the steel pipe 30 when it is docked with the inner support block 22, allowing one end of the steel pipe 30 to be smoothly inserted into the surface of the inner support block 22.

[0044] A circular groove for engaging the shearing portion 221 is provided on one side of the truncated cone sleeve 23. In addition, a spring 231 is provided on the surface of the extension column 222, and the spring 231 is used to push the truncated cone sleeve 23 away from the inner support block 22. A limiting nut 223 for limiting the truncated cone sleeve 23 is provided at the outer end of the extension column 222. Under normal conditions, the spring 231 pushes the truncated cone sleeve 23, so that the shearing portion 221 is in a naked state, so that the shearing portion 221 can cooperate with the cutter head 13 to shear the steel pipe 30. A cylindrical portion 232 is also provided on one side of the round bottom of the truncated cone sleeve 23, and its outer diameter is consistent with the outer diameter of the inner support block 22.

[0045] like Figure 7-Figure 8 As shown, after the steel pipe 30 is sheared, the incision thereof usually closes (since the corresponding end of the finished pipe 31 is supported by the inner support block 22, the closing phenomenon can be ignored), resulting in the diameter of the incision being smaller than the diameter of the inner wall of the tube. In this case, when the edge of the connection position between the inner support block 22 and the shearing portion 221 passes through the incision, it is easy to cause obstruction, resulting in the steel pipe 30 being unable to be smoothly sleeved on the outer surface of the inner support block 22. However, through the design of the truncated cone sleeve 23 and the spring 231, when the steel pipe 30 is pushed toward the truncated cone sleeve 23, the closing of the steel pipe 30 will first push the truncated cone sleeve 23 to move toward the inner support block 22 until the cylindrical portion 232 docks with the outer surface of the inner support block 22. At this time, the closing of the steel pipe 30 can smoothly transition to the outer surface of the inner support block 22, so that the steel pipe 30 can be smoothly sleeved on the outer surface of the inner support block 22.

[0046] In addition, the outer surfaces of the truncated cone sleeve 23, the cylindrical portion 232 and the inner support block 22 can also exert an outward squeezing effect on the closing end of the steel pipe 30, so that the closing end can be restored.

[0047] like Figures 5 to 8 As shown, a limiting sleeve 24 is movably mounted on the surface of the support rod 21. A bolt is threadedly connected to one side of the limiting sleeve 24. One end of the bolt passes through the limiting sleeve 24 and abuts against the surface of the support rod 21, thereby securing the limiting sleeve 24 to the support rod 21. By adjusting the position of the limiting sleeve 24 on the support rod 21, the length of the steel pipe 30 wrapped around the rod core mechanism 20 can be limited, thereby precisely controlling the shear length of the finished pipe 31.

[0048] like Figure 5 As shown, the support rod 21 has an arcuate surface along its length, with an opening slot 1 212 defined on its upper side and a guide slot 211 defined on its side. Correspondingly, a second opening slot 241 is defined on the upper side of the limiting sleeve 24, communicating with the opening slot 1 212. Furthermore, a slider is fixedly mounted on the inner wall of the limiting sleeve 24 at a position corresponding to the guide slot 211. This slider slides into the guide slot 211, thereby ensuring stable assembly of the limiting sleeve 24 on the support rod 21.

[0049] A guide rail is located above opening slot 1 212 and is fixed to one side of assembly plate 41. A movable block is mounted on the guide rail. Normally, the movable block is secured to the guide rail via bolts on one side, using the same securing principle as that of the stop sleeve 24. A push block 25 is fixedly connected to the underside of the movable block. Push block 25 moves within opening slot 1 212, initially positioned on the side of the stop sleeve 24 away from the conical sleeve 23.

[0050] Specifically, when the finished tube 31 is just cut, its cut is easily blocked by the cylindrical portion 232 as it passes one side. However, by providing the push block 25, as the telescopic member 1 42 controls the support rod 21 to move away from the truncated cone sleeve 23, after the push block 25 slides over the second opening groove 241, it can push the finished tube 31, which is sleeved on the surface of the inner support block 22, toward the truncated cone sleeve 23, allowing the cut on one side of the finished tube 31 to smoothly pass over the truncated cone sleeve 23. This design effectively prevents the truncated cone sleeve 23 from falling off the rod core mechanism 20 and ensures the smoothness of the entire process.

[0051] It should be noted that the arc surfaces of the columnar portion 232 and the inner support block 22 are both smooth in design. When the cutouts of the steel pipe 30 and the finished pipe 31 slide on these surfaces, friction is minimal, further ensuring smooth operation.

[0052] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A thin-walled stainless steel pipe cutting device, comprising a machine (10), wherein a double-station slide module (11) and a propulsion assembly (15) are provided on the machine (10), wherein the propulsion assembly (15) pushes the steel pipe (30) to the middle of two stations of the double-station slide module (11), wherein the two stations of the double-station slide module (11) are respectively provided with a motor (131) and a pulley assembly (14), and a cutter disc (13) is provided at the output end of the motor (131), characterized in that: The machine (10) is provided with a support mechanism (40) on the side away from the steel pipe (30), and a rod core mechanism (20) is provided on one side of the support mechanism (40) and is in the same axial direction as the steel pipe (30). When the steel pipe (30) is pushed, it is actively sleeved on the outer surface of the rod core mechanism (20), and then the double-station slide module (11) drives the cutter disc (13) and the pulley group (14) to move closer, and cooperates with the rod core mechanism (20) to form a shearing structure, thereby shearing the steel pipe (30); The support mechanism (40) includes an assembly plate (41), the assembly plate (41) is rotatably assembled on one side of the machine platform (10) through fixed frames (43) on both sides, the rod core mechanism (20) is assembled on one side of the assembly plate (41), and the fixed frame (43) is equipped with a second telescopic member (44) for pulling the assembly plate (41) to rotate; One end of the rod core mechanism (20) is movably assembled on the assembly plate (41), and a telescopic member (42) for pushing the rod core mechanism (20) to move is assembled on the assembly plate (41), and the output end of the telescopic member (42) is fixedly connected to one end of the truncated cone sleeve (23); The rod core mechanism (20) comprises a support rod (21), one end of the support rod (21) is connected to a columnar inner support block (22), the diameter of the inner support block (22) corresponds to the inner diameter of the steel pipe (30), and the end of the inner support block (22) away from the support rod (21) is provided with a shearing portion (221); The surface of the support rod (21) is provided with a limit sleeve (24), one side of the limit sleeve (24) is threadedly connected with a bolt, one end of the bolt passes through the limit sleeve (24) and abuts against the surface of the support rod (21), thereby fixing the position of the limit sleeve (24) on the support rod (21); The arc surface of the support rod (21) is provided with an opening groove (212) on its upper side along the length direction, and a guide groove (211) is provided on the side; the upper side of the limiting sleeve (24) is provided with an opening groove (241) corresponding to the opening groove (212); and the inner wall of the limiting sleeve (24) is fixedly provided with a slider that slides into the guide groove (211) at a position corresponding to the guide groove (211); A guide rail is provided above the first opening groove (212), and the guide rail is fixed to one side of the assembly plate (41). A movable block is provided on the guide rail, and a push block (25) is fixedly connected to the lower side of the movable block. The push block (25) moves inside the first opening groove (212).

2. The thin-walled stainless steel pipe cutting device according to claim 1, characterized in that: The inner support block (22) is provided with an extension column (222) on one side close to the shearing portion (221), and a truncated cone sleeve (23) is provided on the sliding sleeve on the surface of the extension column (222). The bottom diameter of the truncated cone sleeve (23) is consistent with the outer diameter of the inner support block (22), and the dome is provided on the side away from the inner support block (22).

3. The thin-walled stainless steel pipe cutting device according to claim 2, characterized in that: A circular groove for engaging the shearing portion (221) is provided on one side of the truncated cone sleeve (23), and a spring (231) for pushing the truncated cone sleeve (23) away from the inner support block (22) is also provided on the surface of the extension column (222). A limiting nut (223) for limiting the truncated cone sleeve (23) is provided at the outer end of the extension column (222). Under normal conditions, the spring (231) pushes the truncated cone sleeve (23) so that the shearing portion (221) is in an exposed state.

4. The thin-walled stainless steel pipe cutting device according to claim 3, characterized in that: A cylindrical portion (232) is provided on one side of the circular bottom of the truncated cone sleeve (23), and the outer diameter of the cylindrical portion (232) is consistent with the outer diameter of the inner support block (22).

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