Centering and clamping device for chuck of laser pipe cutting machine

Abstract

The invention belongs to the technical field of thermal cutting, and particularly relates to a laser pipe cutting machine chuck centering and clamping device which comprises a shell, a driving assembly, a clamping assembly and a lifting mechanism. The driving assembly and the clamping assembly are arranged in the shell and above the shell respectively, and the bracket is connected with the limiting ring through the connecting rod; wherein the bracket and the clamping assembly are arranged in a staggered mode, and when the bracket moves in the axial direction of the connecting rod, the bracket and the clamping assembly do not interfere with each other. When different sections of the pipe are machined, and the outer wall of a certain section is precisely machined or plated with a special plating layer, the device can achieve switching from outer wall clamping to inner wall clamping. By means of a special supporting and positioning structure, the pipe can be stably fixed without holding the pipe body by hand, damage such as indentation and plating falling caused by clamping force to a machined outer wall section can be avoided through inner wall space fixation, and therefore the overall quality of the pipe is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of thermal cutting technology, specifically relating to a chuck centering and clamping device for a laser tube cutting machine. Background Technology

[0002] In the field of laser tube cutting, stable clamping and precise alignment of the tube are crucial prerequisites for ensuring cutting accuracy. Currently, when laser tube cutting machines are cutting the same tube, they often need to switch the clamping position according to processing requirements, that is, switch from clamping one part of the tube to another, specifically from clamping the outer wall of the tube to clamping the inner wall, or vice versa. Specifically, the processing requirement to switch clamping positions for the same tube mainly manifests in the following scenarios: When processing different sections of a pipe, if the outer wall of one section has already been precision-machined or coated with a special layer, and subsequent processing requires working on other sections of the pipe, continuing to clamp the already processed outer wall section can easily cause damage such as indentations and coating peeling due to the clamping force, affecting the overall quality of the pipe. In this case, it is necessary to switch to clamping the inner wall of the pipe, using the inner wall space to fix the pipe and avoid damaging the already processed outer wall section.

[0003] When performing complex multi-stage cutting on the same pipe, such as first drilling a hole in the middle of the pipe and then making irregular cuts at the ends, clamping the outer wall of the pipe may be convenient when drilling the hole in the middle. However, when making irregular cuts at the ends, if the outer wall is still clamped, the clamping components may block the laser cutting path, preventing the laser from accurately reaching the processing position at the end. In this case, it is necessary to switch the clamping position to clamp the inner wall of the pipe to avoid the cutting area at the end and provide sufficient operating space for laser cutting.

[0004] However, existing laser tube cutting machine chuck clamping devices have significant technical drawbacks when performing the aforementioned clamping position switching operation on the same tube: due to the lack of a dedicated tube support and positioning structure, operators must manually hold the tube to adjust its position to coordinate with the switching action of the clamping components. This manual operation method increases the intensity of manual labor and is not convenient for single-person operation.

[0005] In view of the shortcomings of the existing technology, there is an urgent need to develop a chuck centering and clamping device for laser tube cutting machines that can stably support the same tube, avoid interference with the clamping components, and facilitate quick switching of clamping positions, so as to improve the accuracy, efficiency and automation of laser tube cutting processing. Summary of the Invention

[0006] To address the problems mentioned in the background section, this invention provides a chuck centering and clamping device for a laser tube cutting machine.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a chuck centering and clamping device for a laser tube cutting machine, comprising a housing, a drive assembly, a clamping assembly, and a lifting mechanism; the drive assembly and the clamping assembly are respectively disposed inside and above the housing, and the drive assembly is used to drive the clamping assembly to clamp the tube; The lifting mechanism includes a bracket, a connecting rod, and a limiting ring; The bracket is connected to the limiting ring via the connecting rod; The bracket and the clamping assembly are offset from each other, so that when the bracket moves along the axial direction of the connecting rod, the bracket and the clamping assembly do not interfere with each other.

[0008] Preferably, it also includes a lifting device, the output end of which is connected to the limiting ring.

[0009] Preferably, the lifting mechanism further includes a slide rail, a protrusion, and bolts; The slide rail is connected to the housing, the slide rail is connected to the protrusion, the protrusion is connected to the limiting ring, the protrusion is threadedly connected to the bolt, and the slide rail is slidably connected to the limiting ring; The housing is provided with a threaded hole that matches the bolt. When the bracket is at its highest point, the bolt can pass through the protrusion and be fixed in the threaded hole on the housing.

[0010] Preferably, the clamping assembly includes a clamping head, a first clamping part, a second clamping part, and a base; The base is slidably connected to the outer shell, the clamping head is disposed on the base, and the first clamping part and the second clamping part are respectively disposed at both ends of the traveling direction of the clamping head; The first clamping part and the second clamping part are used to fix the outer wall and inner wall of the pipe, respectively.

[0011] Preferably, the first clamping part and the second clamping part are detachably connected to the clamping head.

[0012] Preferably, the clamping assembly further includes a snap-fit ​​strip and a snap-fit ​​groove; The snap-fit ​​strip is integrally formed on the clamping head, the snap-fit ​​groove is machined on the base body, and the snap-fit ​​strip can snap onto the snap-fit ​​groove; The snap-fit ​​groove is positioned perpendicular to the travel direction of the base.

[0013] Preferably, the drive assembly includes an electric push rod, a top plate, a limiting rod, a first drive component, a second drive component, and a groove. The output end of the electric push rod is connected to the top plate, the top plate is slidably connected to the limiting rod, the limiting rod is connected to the outer shell, the top plate is rotatably connected to the first driving member, the first driving member is rotatably connected to the second driving member, the groove is machined below the base, one end of the second driving member is disposed inside the groove, and the middle part of the second driving member is rotatably connected to the outer shell. When the electric push rod drives the top plate to move, the electric push rod indirectly drives the second driving member to move inside the groove and indirectly drives the seat to slide.

[0014] Preferably, it further includes at least two positioning components disposed on the bracket; the positioning components include a base plate, a first rotating part, a second rotating part, a connecting rod, an elastic component, a fixing head, a shaft, and a torsion spring; The base plate is detachably connected to the bracket. The base plate is connected to the shaft. The shaft is rotatably connected to the first rotating part. The torsion spring is sleeved on the shaft. The two ends of the torsion spring are respectively connected to the shaft and the first rotating part. The first rotating part is rotatably connected to the second rotating part. The second rotating part is rotatably connected to the connecting rod. The connecting rod is slidably connected to the base plate. The elastic component is disposed between the connecting rod and the fixed head. The outer wall of the fixed head is slidably connected to the inner wall of the connecting rod. When the torsion spring does not undergo elastic deformation, that is, when the first rotating part and the second rotating part are parallel, the fixed head is at its maximum stroke.

[0015] Preferably, the elastic component includes a spring; the spring is sleeved on the fixed head, and both ends of the spring are respectively connected to the connecting rod and an annular protrusion on the fixed head; At least two of the fixing heads are used to press against the inner wall of the pipe for fixing.

[0016] Preferably, the positioning assembly further includes a contact portion, a contact rod, and a wheel; The contact portion is horizontally positioned above the first rotating portion, the contact rod is connected to the top of the housing, and the wheel is rotatably connected to the contact rod; When the bracket is attached to the housing, the wheel and the contact rod can pass through the base plate and drive the contact part to move away from the housing, while the fixing head moves towards the base plate.

[0017] Compared with the prior art, the beneficial effects of this invention are: when processing different sections of the pipe, and the outer wall of a certain section has been precision-machined or coated with a special layer, the device can switch from clamping the outer wall to clamping the inner wall. With the help of a specialized support and positioning structure, the pipe can be stably fixed without holding it by hand. Utilizing the inner wall space for fixation avoids damage such as indentations or coating peeling caused by clamping force to the processed outer wall section, thereby ensuring the overall quality of the pipe.

[0018] The bracket and clamping assembly in the device are staggered, so they do not interfere with each other when the bracket moves along the connecting rod axially. This eliminates the need to dismantle the support structure when adjusting the support height or changing the clamping position, reducing operational steps, saving time, and effectively improving processing efficiency. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an exploded view of the invention; Figure 3 This is a schematic diagram of the connection structure between the outer casing and the power unit in this invention; Figure 4 This is a schematic diagram of the connection structure of the lifting mechanism in this invention; Figure 5 This is a schematic diagram of the connection structure of the bolt and connecting rod in this invention; Figure 6 This is a schematic diagram of the connection structure between the driving component and the clamping component in this invention; Figure 7 This is a partially enlarged view of the driving component in this invention; Figure 8 This is a schematic diagram of the connection structure between the second driving member and the groove in this invention; Figure 9 This is a schematic diagram of the connection structure of the positioning component in this invention.

[0020] Explanation of reference numerals in the attached figures: 1. Housing; 2. Power unit; 3. Lifting mechanism; 301. Limiting ring; 302. Slide rail; 303. Protrusion; 304. Bolt; 305. Connecting rod; 306. Bracket; 4. Positioning assembly; 401. Base plate; 402. Contact rod; 403. Wheel; 404. First rotating part; 405. Contact part; 406. Second rotating part; 407. Fixed head; 408. Connecting rod; 4 09. Spring; 411. Shaft; 410. Torsion spring; 5. Drive assembly; 501. Electric push rod; 502. Top plate; 503. Limiting rod; 504. First drive component; 505. Second drive component; 506. Groove; 6. Clamping assembly; 601. Clamping head; 602. First clamping part; 603. Second clamping part; 604. Seat; 605. Snap-fit ​​groove; 606. Snap-fit ​​strip. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1 to 5 The image shows a chuck centering and clamping device for a laser tube cutting machine. This device mainly includes a housing 1, a power unit 2, a drive assembly 5, a clamping assembly 6, and a lifting mechanism 3. The power unit 2 drives the housing 1 to rotate, thereby adjusting the position of the tube. The power unit 2 can be a servo motor paired with a reducer for transmission. The drive assembly 5 is located inside the housing 1, and the clamping assembly 6 is located above the housing 1. The function of the drive assembly 5 is to drive the clamping assembly 6 to clamp the tube. The lifting mechanism 3 mainly consists of a bracket 306, a connecting rod 305, and a limiting ring 301. The bracket 306 is connected to the limiting ring 301 via the connecting rod 305, and the bracket 306 and the clamping assembly 6 are offset. This design ensures that when the bracket 306 moves axially along the connecting rod 305, the bracket 306 and the clamping assembly 6 will not interfere with each other. The lifting mechanism 3 also includes a slide rail 302, a protrusion 303, and a bolt 304. The slide rail 302 is fixedly connected to the outer shell 1, and the protrusion 303 is slidably connected to the slide rail 302. The protrusion 303 is also connected to the limiting ring 301. The protrusion 303 has a threaded hole for threaded connection with the bolt 304. The outer shell 1 has a threaded hole matching the bolt 304. When the bracket 306 rises to its highest point under the action of the lifting equipment, the bolt 304 can pass through the threaded hole on the protrusion 303 and screw into the threaded hole on the outer shell 1, thereby fixing the position of the bracket 306 and preventing displacement due to the weight of the pipe during operation, ensuring the stability of the device when clamping the pipe.

[0023] In another embodiment, the manual fixing method described above is replaced by a lifting device (the specific form is not shown in the figure, but common lifting power sources such as cylinders and hydraulic cylinders can be used). The output end of the lifting device is connected to the limiting ring 301. Through the extension and retraction of the lifting device, the limiting ring 301 can be moved in a specific direction, thereby driving the bracket 306 to rise or fall through the connecting rod 305.

[0024] like Figures 6 to 8 As shown: The specific structures of the clamping assembly 6 and the driving assembly 5 of this device are as follows: The clamping assembly 6 includes a clamping head 601, a first clamping part 602, a second clamping part 603, a base 604, a snap-fit ​​strip 606, and a snap-fit ​​groove 605.

[0025] The base 604 is slidably connected to the outer shell 1. Specifically, a suitable slide rail structure is provided on the outer shell 1, allowing the base 604 to slide stably along a preset trajectory. The clamping head 601 is mounted on the base 604 and is connected via a snap-fit ​​strip 606 and a snap-fit ​​groove 605. The snap-fit ​​strip 606 is integrally formed on the clamping head 601, while the snap-fit ​​groove 605 is machined on the base 604. The snap-fit ​​groove 605 is positioned perpendicular to the travel direction of the base 604. This design ensures a stable connection between the clamping head 601 and the base 604, while also facilitating quick disassembly and replacement of the clamping head 601. After the clamping head 601 and the base 604 are positioned at different locations via the snap-fit ​​strip 606 and the snap-fit ​​groove 605, they can be further secured using bolts or other fasteners.

[0026] The first clamping part 602 and the second clamping part 603 are respectively located at both ends of the clamping head 601 in the traveling direction. Both are detachably connected to the clamping head 601, such as by bolts or snap-fit ​​connections, facilitating the replacement of clamping parts of different sizes according to the specifications of the pipe. The first clamping part 602 is used to fix the outer wall of the pipe, and the second clamping part 603 is used to fix the inner wall of the pipe. Through their cooperation, the pipe can be stably clamped from both the inside and outside, improving the centering accuracy and clamping stability.

[0027] The drive assembly 5 includes an electric push rod 501, a top plate 502, a limit rod 503, a first drive component 504, a second drive component 505, and a groove 506.

[0028] An electric push rod 501 is fixedly installed inside the housing 1, and its output end is fixedly connected to the top plate 502 to provide power to the entire drive assembly. A limiting rod 503 is fixedly connected to the housing 1, and a through hole adapted to the limiting rod 503 is provided on the top plate 502, so that the top plate 502 can slide stably along the axial direction of the limiting rod 503, ensuring the linearity and stability of the movement of the top plate 502.

[0029] The top plate 502 is rotatably connected to one end of the first driving member 504 via a rotating shaft, and the other end of the first driving member 504 is also rotatably connected to one end of the second driving member 505 via a rotating shaft. The middle part of the second driving member 505 is rotatably connected to the outer casing 1 via a fixed shaft, allowing the second driving member 505 to rotate around the fixed shaft. The groove 506 is machined below the base 604, and the end of the second driving member 505 away from the first driving member 504 is disposed inside the groove 506 and slides against the inner wall of the groove 506.

[0030] When the electric push rod 501 is started and drives the top plate 502 to move axially along the limit rod 503, the top plate 502 drives the first drive member 504 to move. The first drive member 504 then pushes the second drive member 505 to rotate around the fixed axis in the middle. At this time, one end of the second drive member 505 located in the groove 506 will slide in the groove 506 and drive the seat 604 to slide along the slide rail on the outer shell 1 through the groove 506, thus realizing the clamping or releasing action of the clamping assembly 6.

[0031] like Figure 9 As shown: This device also includes at least two positioning components 4 disposed on the bracket 306. The positioning components 4 can further improve the positioning stability of the pipe during the processing. Its specific structure and working principle are as follows: The positioning assembly 4 includes a base plate 401, a first rotating part 404, a second rotating part 406, a connecting rod 408, an elastic component, a fixing head 407, a shaft 411, a torsion spring 410, a contact part 405, a contact rod 402, and a wheel 403.

[0032] The base plate 401 is detachably mounted on the bracket 306, which can be achieved through common detachable structures such as bolt connections or snap-fit ​​connections, facilitating the disassembly and maintenance of the positioning component 4. The base plate 401 is fixedly connected to the shaft 411, which is arranged perpendicular to the base plate 401. The shaft 411 is rotatably connected to the first rotating part 404, allowing the first rotating part 404 to rotate freely around the axis of the shaft 411. A torsion spring 410 is sleeved on the shaft 411, with one end fixedly connected to the shaft 411 and the other end fixedly connected to the first rotating part 404. Under the elastic force of the torsion spring 410, it can provide a reset force for the first rotating part 404.

[0033] One end of the first rotating part 404 away from the shaft 411 is rotatably connected to one end of the second rotating part 406 by a pin. The other end of the second rotating part 406 is rotatably connected to one end of the connecting rod 408 by a pin. The end of the connecting rod 408 away from the second rotating part 406 is slidably connected to the base plate 401. Specifically, a groove adapted to the connecting rod 408 can be provided on the base plate 401 to ensure that the connecting rod 408 can slide stably along the extension direction of the groove.

[0034] An elastic component is disposed between the connecting rod 408 and the fixed head 407. The elastic component includes a spring 409, which is sleeved on the fixed head 407. The outer wall of the fixed head 407 is slidably connected to the inner wall of the connecting rod 408. An annular protrusion is provided on the fixed head 407. One end of the spring 409 abuts against the end of the connecting rod 408, and the other end abuts against the annular protrusion on the fixed head 407. At least two fixed heads 407 are used to press against the inner wall of the pipe for fixation. Through the elastic force of the spring 409, the fixed head 407 can always maintain close contact with the inner wall of the pipe, adapting to the positioning requirements of pipes with different diameters.

[0035] When the torsion spring 410 does not undergo elastic deformation, that is, the first rotating part 404 and the second rotating part 406 are in a parallel state, the fixed head 407 is in the maximum stroke position under the linkage of each component, which can provide sufficient space for the insertion of the pipe.

[0036] The contact portion 405 is horizontally disposed above the first rotating portion 404, and is fixedly connected to the first rotating portion 404, moving synchronously with the first rotating portion 404. The contact rod 402 is fixedly connected to the top of the housing 1, and extends in a direction perpendicular to the top surface of the housing 1. The wheel 403 is rotatably connected to the contact rod 402 through an axle, and the wheel 403 can rotate freely around the axle.

[0037] When the bracket 306 moves downward along the axial direction of the connecting rod 305 and fits against the outer shell 1, the wheel 403 and the contact rod 402 can pass through the preset through hole on the base plate 401. The wheel 403 contacts the contact part 405 and drives the contact part 405 to move away from the outer shell 1. At this time, the first rotating part 404 rotates around the shaft 411 and causes the torsion spring 410 to undergo elastic deformation. The first rotating part 404 drives the second rotating part 406 to move. The second rotating part 406 pulls the connecting rod 408 to slide along the groove on the base plate 401 towards the direction closer to the shaft 411, thereby driving the fixed head 407 to move towards the direction closer to the base plate 401, realizing the retraction action of the fixed head 407. When the bracket 306 moves upward and away from the outer shell 1, under the elastic force of the torsion spring 410, the first rotating part 404 resets, driving the components to move outward and press against the inner wall of the pipe again. This design achieves a system where the bracket 306 does not contact the pipe when resetting, and secures the pipe after the bracket 306 is raised. This prevents the pipe from falling off the bracket 306 when the clamping assembly 6 below switches clamping positions, significantly improving safety. Furthermore, the use of a linkage between the wheel 403 and the contact rod 402 reduces manual operation steps and the number of electric devices, saving on production costs. The positioning assembly 4 can be detachably connected to the bracket 306 according to the pipe size, allowing for adjustment of the clamping position.

[0038] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A chuck centering and clamping device for a laser tube cutting machine, characterized in that: It includes a housing (1), a drive assembly (5), a clamping assembly (6), and a lifting mechanism (3); the drive assembly (5) and the clamping assembly (6) are respectively disposed inside and above the housing (1), and the drive assembly (5) is used to drive the clamping assembly (6) to clamp the pipe; The lifting mechanism (3) includes a bracket (306), a connecting rod (305), and a limiting ring (301). The bracket (306) is connected to the limiting ring (301) via the connecting rod (305); The bracket (306) and the clamping assembly (6) are misaligned. When the bracket (306) moves along the axial direction of the connecting rod (305), the bracket (306) and the clamping assembly (6) do not interfere with each other.

2. The chuck centering and clamping device for a laser tube cutting machine according to claim 1, characterized in that: It also includes a lifting device, the output end of which is connected to the limiting ring (301).

3. The chuck centering and clamping device for a laser tube cutting machine according to claim 1, characterized in that: The lifting mechanism (3) also includes a slide rail (302), a protrusion (303), and a bolt (304); The slide rail (302) is connected to the outer shell (1), the slide rail (302) is connected to the protrusion (303), the protrusion (303) is connected to the limiting ring (301), the protrusion (303) is threadedly connected to the bolt (304), and the slide rail (302) is slidably connected to the limiting ring (301); The housing (1) is provided with a threaded hole that matches the bolt (304). When the bracket (306) is at its highest point, the bolt (304) can pass through the protrusion (303) and be fixed in the threaded hole on the housing (1).

4. The chuck centering and clamping device for a laser tube cutting machine according to claim 1, characterized in that: The clamping assembly (6) includes a clamping head (601), a first clamping part (602), a second clamping part (603), and a base (604). The base (604) is slidably connected to the outer shell (1), the clamping head (601) is disposed on the base (604), and the first clamping part (602) and the second clamping part (603) are respectively disposed at both ends of the traveling direction of the clamping head (601); The first clamping part (602) and the second clamping part (603) are used to fix the outer wall and inner wall of the pipe, respectively.

5. The chuck centering and clamping device for a laser tube cutting machine according to claim 4, characterized in that: The first clamping part (602) and the second clamping part (603) are detachably connected to the clamping head (601).

6. The chuck centering and clamping device for a laser tube cutting machine according to claim 4, characterized in that: The clamping assembly (6) further includes a snap-fit ​​strip (606) and a snap-fit ​​groove (605); The snap-fit ​​strip (606) is integrally formed on the clamping head (601), the snap-fit ​​groove (605) is machined on the base (604), and the snap-fit ​​strip (606) can be snapped onto the snap-fit ​​groove (605); The snap-fit ​​groove (605) is positioned perpendicular to the travel direction of the base (604).

7. The chuck centering and clamping device for a laser tube cutting machine according to claim 4, characterized in that: The drive assembly (5) includes an electric push rod (501), a top plate (502), a limiting rod (503), a first drive component (504), a second drive component (505), and a groove (506); The output end of the electric push rod (501) is connected to the top plate (502), the top plate (502) is slidably connected to the limiting rod (503), the limiting rod (503) is connected to the outer shell (1), the top plate (502) is rotatably connected to the first driving member (504), the first driving member (504) is rotatably connected to the second driving member (505), the groove (506) is machined below the seat (604), one end of the second driving member (505) is disposed inside the groove (506), and the middle part of the second driving member (505) is rotatably connected to the outer shell (1); When the electric push rod (501) drives the top plate (502) to move, the electric push rod (501) indirectly drives the second drive member (505) to move inside the groove (506) and indirectly drives the seat (604) to slide.

8. The chuck centering and clamping device for a laser tube cutting machine according to claim 1, characterized in that: It also includes at least two positioning components (4) disposed on the bracket (306); the positioning component (4) includes a base plate (401), a first rotating part (404), a second rotating part (406), a connecting rod (408), an elastic component, a fixing head (407), a shaft (411) and a torsion spring (410). The base plate (401) is detachably connected to the bracket (306). The base plate (401) is connected to the shaft (411). The shaft (411) is rotatably connected to the first rotating part (404). The torsion spring (410) is sleeved on the shaft (411). The two ends of the torsion spring (410) are respectively connected to the shaft (411) and the first rotating part (404). The first rotating part (404) is rotatably connected to the second rotating part (406). The second rotating part (406) is rotatably connected to the connecting rod (408). The connecting rod (408) is slidably connected to the base plate (401). The elastic component is disposed between the connecting rod (408) and the fixed head (407). The outer wall of the fixed head (407) is slidably connected to the inner wall of the connecting rod (408). When the torsion spring (410) does not undergo elastic deformation, that is, when the first rotating part (404) and the second rotating part (406) are parallel, the fixed head (407) is at its maximum stroke.

9. The chuck centering and clamping device for a laser tube cutting machine according to claim 8, characterized in that: The elastic component includes a spring (409); the spring (409) is sleeved on the fixed head (407), and the two ends of the spring (409) are respectively connected to the connecting rod (408) and the annular protrusion on the fixed head (407); At least two of the fixing heads (407) are used to abut against the inner wall of the pipe for fixing.

10. The chuck centering and clamping device for a laser tube cutting machine according to claim 9, characterized in that: The positioning component (4) also includes a contact part (405), a contact rod (402), and a wheel (403). The contact part (405) is horizontally disposed above the first rotating part (404), the contact rod (402) is connected to the top of the outer casing (1), and the wheel (403) is rotatably connected to the contact rod (402); When the bracket (306) is attached to the outer shell (1), the wheel (403) and the contact rod (402) can pass through the base plate (401) and drive the contact part (405) to move away from the outer shell (1), at which time the fixing head (407) moves towards the base plate (401).

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