A laser pipe cutting machine

Abstract

The application discloses a laser pipe cutting machine and belongs to the technical field of metal cutting. The laser pipe cutting machine comprises a machine shell, a laser cutting head arranged on the machine shell, a base cylinder rotatably arranged in the machine shell, a power mechanism arranged in the machine shell and used for driving the base cylinder to rotate, a first clamping unit, a second clamping unit and two third clamping units which are slidably arranged in the base cylinder and have the freedom of moving along the radial direction of the base cylinder, a center cylinder fixed to the inner side of the base cylinder through a connecting plate and a multi-stage driving mechanism arranged on the center cylinder. The multi-stage driving mechanism can drive the first clamping unit, the second clamping unit and the third clamping unit to move synchronously, so that the round pipe or the triangular pipe is clamped and centered. The first clamping unit and the second clamping unit are moved cooperatively to form the limiting of the upper and lower sides of the rectangular pipe, and the two third clamping units are moved cooperatively to form the limiting of the left and right sides of the rectangular pipe, so that the rectangular pipe and the square pipe are clamped and centered, and the laser pipe cutting machine has the advantage of wide application range.

Description

Technical Field

[0001] This invention relates to the field of metal cutting technology, and more specifically to a laser tube cutting machine. Background Technology

[0002] A laser tube cutting machine is a metal tube cutting device that uses a laser as the metal cutting tool and is frequently used in the manufacturing process of doors and windows. Existing laser tube cutting machines often use a three-jaw chuck as the clamping mechanism to hold round tubes, but this clamping mechanism cannot be used to clamp square tubes. While a four-jaw chuck can clamp square tubes, it cannot center and clamp triangular tubes. This results in frequent changes to the entire set of clamps when using a laser tube cutting machine for opening holes and contour cutting of tubes, making the operation cumbersome. Summary of the Invention

[0003] To address the aforementioned technical shortcomings, the present invention aims to provide a laser tube cutting machine that improves clamping compatibility by setting a first clamping unit, a second clamping unit, and two third clamping units. This machine can be used to clamp rectangular tubes, round tubes, and triangular tubes for laser cutting.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a laser tube cutting machine, comprising:

[0005] A housing, on which a laser cutting head is mounted, the laser cutting head having the freedom to move up and down and horizontally;

[0006] A base cylinder is rotatably mounted in a housing, and a power mechanism for driving the base cylinder to rotate is provided inside the housing.

[0007] The first clamping unit, the second clamping unit, and the two third clamping units are all slidably installed inside the base cylinder and have the freedom to move radially along the base cylinder. The first clamping unit and the second clamping unit are arranged opposite to each other, and the two third clamping units are symmetrically arranged on the left and right sides of the first clamping unit.

[0008] The center cylinder is fixed to the inside of the base cylinder by a connecting plate. The center cylinder and the base cylinder are coaxial. The center cylinder is provided with a multi-stage driving mechanism for driving the first clamping unit and the second clamping unit to move symmetrically and driving the two third clamping units to move symmetrically.

[0009] The first clamping unit and the two third clamping units are each provided with a telescopic support member, and the angle between the telescopic support member in the first clamping unit and the telescopic support member in the third clamping unit is 120 degrees.

[0010] Preferably, both the first clamping unit and the second clamping unit include:

[0011] The first sliding arm is slidably mounted on the first sliding block, and the first sliding block is fixed inside the base cylinder;

[0012] A first clamping part, on which multiple rollers parallel to the central cylinder are rotatably mounted;

[0013] The first connecting arm is used to connect the first sliding arm and the first clamping part.

[0014] Preferably, the third clamping unit includes:

[0015] The third sliding arm is slidably mounted on the third sliding block, which is fixed on the base cylinder. The angle between the third sliding arm and the first sliding arm in the first clamping unit is 120 degrees.

[0016] The third clamping part is rotatably mounted with multiple rollers parallel to the central cylinder, and the third clamping part is perpendicular to the first clamping part.

[0017] The third connecting arm is used to connect the third clamping part and the third sliding arm.

[0018] Preferably, the first connecting arm has a first mounting groove, and the telescopic support member in the first clamping unit includes:

[0019] A first motor is fixed in the first mounting slot, and the output shaft of the first motor is connected to a first lead screw;

[0020] The first support seat is slidably installed in the first mounting groove. The first support seat is threadedly engaged with the first lead screw. A support wheel parallel to the roller is rotatably installed at the end of the first support seat away from the first motor.

[0021] When the first motor starts, the first support slides in the first mounting groove, and the sliding direction is the same as the sliding direction of the first sliding arm in the first sliding block.

[0022] Preferably, a slide rail is fixed inside the first support base, and a stop block is slidably installed on the slide rail. When the first support base slides outward from the first mounting groove a certain distance, the stop block abuts against the fixed support wheel through a locking mechanism.

[0023] Preferably, the locking mechanism includes:

[0024] Gear, the gear being rotatably mounted within the first support;

[0025] The first rack is fixed to the abutment and meshes with the gear;

[0026] The second rack is fixed to the inner wall of the first mounting groove and meshes with the gear;

[0027] When the first support slides in the first mounting groove, the gear rolls on the second rack and drives the first rack and the abutment to move on the slide rail.

[0028] Preferably, the multi-stage drive mechanism includes:

[0029] A movable ring is slidably sleeved on a central cylinder, and a first cylinder for driving the movable ring to move is provided on the central cylinder;

[0030] Two first links are symmetrically hinged to the movable ring, and the ends of the two first links away from the movable ring are respectively hinged to the first sliding arms on the first clamping unit and the second clamping unit.

[0031] The secondary drive unit is located on the active ring;

[0032] Two second links are symmetrically hinged to the secondary drive unit, and the ends of the two second links away from the secondary drive unit are respectively hinged to the third sliding arms on the two third clamping units.

[0033] Preferably, the secondary drive unit includes:

[0034] Two guide rods are fixed on the movable ring and parallel to the central cylinder;

[0035] Two sliding sleeves are slidably mounted on two guide rods respectively, and the two second connecting rods are hinged to the two sliding sleeves respectively;

[0036] The second cylinder is fixed on the movable ring and parallel to the guide rod. The output end of the second cylinder is fixed with a connecting plate, and the connecting plate is fixedly connected to two sliding sleeves.

[0037] In the initial state, the two second connecting rods and the two first connecting rods of the second cylinder are all on the same circumferential surface of the movable ring.

[0038] Preferably, both the first clamping unit and the second clamping unit are provided with two first clamping parts, and the third clamping part is located between the two first clamping parts.

[0039] Preferably, the power mechanism includes a gear ring fixed on the base cylinder and a second motor fixed inside the housing. A gear that meshes with the gear ring is fixed on the output shaft of the second motor. The base cylinder is rotatably mounted inside the housing via a slewing bearing.

[0040] The beneficial effects of this invention are as follows:

[0041] This invention comprises a first clamping unit, a second clamping unit, and two third clamping units within a base cylinder. The first and second clamping units, as well as the two third clamping units, are symmetrically movable. When clamping a round or triangular tube, a telescopic support extends from the corresponding clamping unit. A multi-stage drive mechanism drives the first, second, and third clamping units to move synchronously, thereby centering and clamping the round or triangular tube. When clamping a rectangular or square tube, the multi-stage drive mechanism allows the first and second clamping units to move in coordination, creating limits on the upper and lower sides of the rectangular or square tube. The two third clamping units move in coordination to further limit the movement of the rectangular or square tube. The left and right sides of the square tube are limited, thereby achieving centering and clamping of rectangular and square tubes for laser cutting, which has the advantage of wide applicability. The rollers set on the first and third clamping parts of this invention can reduce damage to rectangular and square tubes. When the first clamping unit and the second clamping unit are pressed against the upper and lower sides of the rectangular tube, the two third clamping units can still easily drive the rectangular tube to move horizontally, achieving centering and limiting of the rectangular tube in the horizontal direction. The locking mechanism set in this invention can limit the support wheel when the telescopic support is extended, preventing the support wheel from rotating, thereby ensuring that the round tube will not rotate freely due to the support wheel when clamping, ensuring clamping stability during laser cutting. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a three-dimensional view of the overall structure of a laser tube cutting machine provided in an embodiment of the present invention.

[0044] Figure 2 This is a front view of the overall structure of the present invention.

[0045] Figure 3 This is a front-view perspective view of the base cylinder and its internal structure of the present invention.

[0046] Figure 4 This is a rear-view perspective view of the base cylinder and its internal structure of the present invention.

[0047] Figure 5 This is a rear-view perspective view of the first clamping unit, the second clamping unit, the third clamping unit, the central cylinder, and the multi-stage drive mechanism of the present invention.

[0048] Figure 6This is a front-view perspective view of the first clamping unit, the second clamping unit, the third clamping unit, the central cylinder, and the multi-stage drive mechanism of the present invention.

[0049] Figure 7 This is a schematic diagram of the telescopic support component in this invention.

[0050] Figure 8 This is a schematic diagram of the present invention clamping a rectangular tube.

[0051] Figure 9 This is a schematic diagram of the present invention clamping a triangular tube.

[0052] Explanation of reference numerals in the attached figures:

[0053] 1. Housing; 2. Laser cutting head; 3. Lifting rail; 4. Horizontal rail; 5. Base cylinder; 6. First clamping unit; 61. First sliding arm; 62. First sliding block; 63. First clamping part; 64. Roller; 65. First connecting arm; 7. Second clamping unit; 8. Third clamping unit; 81. Third sliding arm; 82. Third sliding block; 83. Third clamping part; 84. Third connecting arm; 9. Center cylinder; 10. Connecting plate; 11. Telescopic support. Components: 111. First mounting slot; 112. First motor; 113. First lead screw; 114. First support base; 115. Support wheel; 116. Slide rail; 117. Abutment block; 118. First rack; 119. Second rack; 12. Movable ring; 13. First cylinder; 14. First connecting rod; 15. Second connecting rod; 16. Guide rod; 17. Sliding sleeve; 18. Second cylinder; 19. Connecting plate; 20. Rectangular tube; 21. Triangular tube. Detailed Implementation

[0054] 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.

[0055] Example 1:

[0056] Embodiment 1 of the present invention provides a laser tube cutting machine that can reliably center and clamp round tubes, triangular tubes 21, rectangular tubes 20, and square tubes.

[0057] like Figures 1 to 9As shown, the laser tube cutting machine designed in this invention includes a housing 1, on which a lifting rail 3 is fixedly mounted, and a horizontal rail 4 is slidably mounted. The laser cutting head 2 is slidably mounted on the horizontal rail 4. This allows the laser cutting head 2 to have the freedom to move vertically and horizontally, enabling flexible adjustment of its position during the cutting process. Driving the laser cutting head 2 to move vertically and horizontally can be achieved directly using existing technology; this invention does not improve the moving structure of the laser cutting head 2.

[0058] A base cylinder 5 is rotatably mounted inside the housing 1. The base cylinder 5 achieves 360° stable rotation relative to the housing 1 via a slewing bearing. A power mechanism for driving the rotation of the base cylinder 5 is fixed inside the housing 1. The power mechanism includes a gear ring fixed to the outer circumference of the base cylinder 5 and a second motor fixed inside the housing 1. A gear meshing with the gear ring is fixed on the output shaft of the second motor. By rotating the second motor in both directions, the base cylinder 5 can be rotated in either direction, thereby driving the clamped tube to rotate circumferentially, facilitating the laser cutting head 2 to perform full circumferential cutting on the tube. Since this type of power mechanism is quite common, it is omitted in the accompanying drawings.

[0059] A central cylinder 9 is coaxially fixed inside the base cylinder 5. For example... Figure 4 As shown, the central cylinder 9 is fixedly connected to the inner wall of the base cylinder 5 via four connecting plates 10. Figure 1 As shown, a first clamping unit 6, a second clamping unit 7, and two third clamping units 8 are slidably installed inside the base cylinder 5. The first clamping unit 6 and the second clamping unit 7 are arranged opposite each other, and the two third clamping units 8 are symmetrically arranged on the left and right sides of the first clamping unit 6. The first clamping unit 6 and the second clamping unit 7 have a degree of freedom to move symmetrically along the radial direction of the base cylinder 5, with the center of symmetry on the axis of the base cylinder 5, and they can move synchronously in opposite directions. The two third clamping units 8 also have a degree of freedom to move symmetrically along the radial direction of the base cylinder 5, and their axes of symmetry also pass through the axis of the base cylinder 5.

[0060] The central cylinder 9 is equipped with a multi-stage drive mechanism, which is used to synchronously or separately drive the first clamping unit 6, the second clamping unit 7 and the two third clamping units 8 to move closer to or away from the center, so as to achieve centering and clamping of pipes with different cross-sectional shapes.

[0061] like Figures 4 to 6 As shown, the first clamping unit 6 and the second clamping unit 7 have basically the same structure, both including a first sliding arm 61, a first clamping part 63, and a first connecting arm 65 connecting the two. The first sliding arm 61 is slidably mounted on a first sliding block 62 fixed inside the base cylinder 5, and multiple rollers 64 parallel to the central cylinder 9 are rotatably mounted on the first clamping part 63. In the initial state, the first clamping parts 63 on the first clamping unit 6 and the second clamping unit 7 are parallel and symmetrically distributed on the upper and lower sides of the axis of the base cylinder 5.

[0062] The third clamping unit 8 includes a third sliding arm 81, a third clamping part 83, and a third connecting arm 84 connecting the two. The third sliding arm 81 is slidably mounted on a third sliding seat 82 fixed inside the base cylinder 5, and the angle between the third sliding arm 81 and the first sliding arm 61 in the first clamping unit 6 is 120°. The third clamping part 83 is also rotatably mounted with multiple rollers 64 parallel to the central cylinder 9, and the third clamping part 83 is perpendicular to the first clamping part 63 to better accommodate the side clamping of the rectangular tube 20 or square tube. Figure 8 As shown, the two first clamping parts 63 cooperate to clamp the upper and lower sides of the rectangular tube 20 or square tube, while the two third clamping parts 83 cooperate to clamp the left and right sides of the rectangular tube 20 or square tube, aligning the center line of the rectangular tube 20 or square tube with the axis of the base cylinder 5 to achieve centering clamping.

[0063] The first clamping unit 6 and the two third clamping units 8 are each equipped with a retractable telescopic support member 11, with an included angle of 120° between adjacent telescopic support members 11. The telescopic support members 11 can extend from the first clamping part 63 and the third clamping part 83, thus bringing the ends of the telescopic support members 11 closer to the axis of the base cylinder 5. When clamping a round or triangular tube, the three telescopic support members 11 are extended, with the support wheels 115 at the ends of these three telescopic support members 11 equidistant from the axis of the base cylinder 5, allowing the three support wheels 115 to contact the inner wall of the tube and form a three-point centering support. This coordinates with the synchronous radial movement of the first clamping unit 6, the second clamping unit 7, and the two third clamping units 8. Figure 9 As shown, reliable centering and clamping of the round tube or triangular tube 21 can be achieved.

[0064] This embodiment, by setting a first clamping unit 6, a second clamping unit 7 and two third clamping units 8 that can move radially symmetrically inside the base cylinder 5, in conjunction with a retractable telescopic support 11 and a multi-stage drive mechanism, can adapt to tubes with various cross-sectional shapes such as round tubes, triangular tubes 21, rectangular tubes 20 and square tubes, to achieve precise centering clamping and significantly broaden the application range of the laser tube cutting machine.

[0065] Example 2:

[0066] Based on Embodiment 1, Embodiment 2 further designs the structure of the telescopic support 11 to make the clamping more stable and the damage to the pipe surface less. At the same time, it can effectively prevent the pipe from rotating with the support wheel 115 when clamping the round pipe or triangular pipe 21.

[0067] like Figure 6 and Figure 7As shown, taking the first clamping unit 6 as an example, a first mounting groove 111 is provided on the first connecting arm 65. A telescopic support member 11 is disposed within the first mounting groove 111, including a first motor 112 fixed to the bottom of the first mounting groove 111, a first lead screw 113 connected to the output shaft of the first motor 112, and a first support seat 114 threadedly engaged with the first lead screw 113. The first support seat 114 is slidably mounted in the first mounting groove 111. A support wheel 115 is rotatably mounted on the end of the first support seat 114 away from the first motor 112. The axis of the support wheel 115 is parallel to the roller 64. In the initial state, the support wheel 115 is flush with the roller 64, both functions capable of clamping the pipe. When the first motor 112 rotates forward, the first support seat 114 slides outward along the first mounting groove 111, that is, moves toward the axis of the base cylinder 5, until the support wheel 115 extends out of the first clamping part 63. At this time, when the first clamping unit 6 moves, the support wheel 115 will first abut against the pipe, thereby causing the roller 64 to lose its function. When the first motor 112 rotates in reverse, the support wheel 115 retracts.

[0068] To prevent the support wheel 115 from rotating freely due to the weight of the pipe or cutting vibration after it extends, an automatic locking mechanism is also provided inside the first support base 114. For example... Figure 7 As shown, the locking mechanism includes a gear rotatably mounted in the first support base 114, a slide rail 116 fixed on the inner wall of the first support base 114, a stop block 117 slidable along the slide rail 116, a first rack 118 fixed on the stop block 117, and a second rack 119 fixed on the inner wall of the first mounting groove 111. When the first support base 114 slides outward to a predetermined position, the gear rolls on the second rack 119, which drives the first rack 118 and the stop block 117 to move towards the support wheel 115, ultimately causing the stop block 117 to press tightly against the hub of the support wheel 115, thereby locking the support wheel 115 and ensuring that the round tube or triangular tube 21 will not rotate unexpectedly during the cutting process.

[0069] The telescopic support 11 on the third clamping unit 8 has the same structure as the first clamping unit 6, except for its installation position, which will not be described further. The second clamping unit 7 does not have a telescopic support 11.

[0070] With the above structure, this embodiment further improves clamping accuracy and stability, significantly reduces the risk of damage to the pipe surface, and effectively prevents the round pipe from rotating unexpectedly in a three-point support state.

[0071] Example 3:

[0072] Based on Embodiments 1 and 2, this embodiment further optimizes the arrangement of the multi-stage drive mechanism and the clamping part to achieve more precise graded drive and a wider range of pipe material adaptability.

[0073] like Figure 5 As shown, the multi-stage drive mechanism includes a movable ring 12 slidably sleeved on a central cylinder 9, and a first cylinder 13 fixed on the central cylinder 9 for driving the movable ring 12 to move axially. Two first connecting rods 14 are symmetrically hinged to the movable ring 12, and the other ends of the two first connecting rods 14 are respectively hinged to the first sliding arms 61 of the first clamping unit 6 and the second clamping unit 7. Because the two first connecting rods 14 are symmetrically distributed, when the first cylinder 13 is actuated, the movable ring 12 moves axially, driving the two first connecting rods 14 to move, thereby achieving synchronous symmetrical radial movement of the first clamping unit 6 and the second clamping unit 7.

[0074] The movable ring 12 is also equipped with a secondary drive unit, including two guide rods 16 fixed on the movable ring 12 and parallel to the central cylinder 9, two sliding sleeves 17 slidably mounted on the guide rods 16, a second cylinder 18 fixed on the movable ring 12, and a connecting plate 19 fixedly connected to the output end of the second cylinder 18. The connecting plate 19 is fixedly connected to the two sliding sleeves 17, and two second connecting rods 15 are symmetrically hinged to the two sliding sleeves 17. The other ends of the two second connecting rods 15 are respectively hinged to the third sliding arms 81 of the two third clamping units 8.

[0075] In the initial state, the second cylinder 18 remains in a retracted state, so that the two first connecting rods 14 and the two second connecting rods 15 are located on the same circumferential surface of the movable ring 12, thereby making the support wheel 115 in the first clamping part 63 and the support wheel 115 in the third clamping part 83 equal in distance from the axis of the base cylinder 5.

[0076] With the second cylinder 18 in a retracted state, the first motor 112 drives the support wheel 115 to move, putting the invention into the working state of clamping the triangular tube 21 or the round tube. At this time, the extension and retraction of the first cylinder 13 can drive multiple support wheels 115 to move synchronously, centering and clamping the round tube or triangular tube 21. When it is necessary to clamp the rectangular tube 20 or the square tube, the first motor 112 drives the support wheel 115 to retract into the clamping part, and then drives the first cylinder 13 to achieve the initial clamping and positioning of the first and second clamping units 7, clamping the upper and lower sides of the rectangular tube 20 or the square tube. Then, the second cylinder 18 is driven to achieve the clamping of the two third clamping units 8, so that the center line of the rectangular tube 20 or the square tube is aligned and coincident with the axis of the base cylinder 5.

[0077] In addition, to further improve the support stability of ultra-long pipes, such as Figure 6 As shown, the first clamping unit 6 and the second clamping unit 7 are each provided with two spaced first clamping parts 63, and the third clamping parts 83 of the two third clamping units 8 are located between the two first clamping parts 63, forming an interlaced multi-point support structure, which significantly improves the clamping rigidity and centering accuracy of large-diameter, long-length and thin-walled pipes.

[0078] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A laser tube cutting machine, characterized in that, include: A housing, on which a laser cutting head is mounted, the laser cutting head having the freedom to move up and down and horizontally; A base cylinder is rotatably mounted in a housing, and a power mechanism for driving the base cylinder to rotate is provided inside the housing. The first clamping unit, the second clamping unit, and the two third clamping units are all slidably installed inside the base cylinder and have the freedom to move radially along the base cylinder. The first clamping unit and the second clamping unit are arranged opposite to each other, and the two third clamping units are symmetrically arranged on the left and right sides of the first clamping unit. The center cylinder is fixed to the inside of the base cylinder by a connecting plate. The center cylinder and the base cylinder are coaxial. The center cylinder is provided with a multi-stage driving mechanism for driving the first clamping unit and the second clamping unit to move symmetrically and driving the two third clamping units to move symmetrically. The first clamping unit and the two third clamping units are each provided with telescopic support members, and the angle between the telescopic support members in the first clamping unit and the telescopic support members in the third clamping unit is 120 degrees. Both the first clamping unit and the second clamping unit include: The first sliding arm is slidably mounted on the first sliding block, and the first sliding block is fixed inside the base cylinder; A first clamping part, on which multiple rollers parallel to the central cylinder are rotatably mounted; The first connecting arm is used to connect the first sliding arm and the first clamping part; The third clamping unit includes: The third sliding arm is slidably mounted on the third sliding block, which is fixed on the base cylinder. The angle between the third sliding arm and the first sliding arm in the first clamping unit is 120 degrees. The third clamping part is rotatably mounted with multiple rollers parallel to the central cylinder, and the third clamping part is perpendicular to the first clamping part. The third connecting arm is used to connect the third clamping part and the third sliding arm; The multi-stage drive mechanism includes: A movable ring is slidably sleeved on a central cylinder, and a first cylinder for driving the movable ring to move is provided on the central cylinder; Two first links are symmetrically hinged to the movable ring, and the ends of the two first links away from the movable ring are respectively hinged to the first sliding arms on the first clamping unit and the second clamping unit. The secondary drive unit is located on the active ring; Two second links are symmetrically hinged to the secondary drive unit, and the ends of the two second links away from the secondary drive unit are respectively hinged to the third sliding arms on the two third clamping units. The secondary drive unit includes: Two guide rods are fixed on the movable ring and parallel to the central cylinder; Two sliding sleeves are slidably mounted on two guide rods respectively, and the two second connecting rods are hinged to the two sliding sleeves respectively; The second cylinder is fixed on the movable ring and parallel to the guide rod. The output end of the second cylinder is fixed with a connecting plate, and the connecting plate is fixedly connected to two sliding sleeves. In the initial state, the two second connecting rods and the two first connecting rods of the second cylinder are all on the same circumferential surface of the movable ring.

2. The laser tube cutting machine as described in claim 1, characterized in that, The first connecting arm has a first mounting groove, and the telescopic support member in the first clamping unit includes: A first motor is fixed in the first mounting slot, and the output shaft of the first motor is connected to a first lead screw; The first support seat is slidably installed in the first mounting groove. The first support seat is threadedly engaged with the first lead screw. A support wheel parallel to the roller is rotatably installed at the end of the first support seat away from the first motor. When the first motor starts, the first support slides in the first mounting groove, and the sliding direction is the same as the sliding direction of the first sliding arm in the first sliding block.

3. A laser tube cutting machine as described in claim 2, characterized in that, The first support base has a slide rail fixed inside, and a stop block is slidably installed on the slide rail. When the first support base slides outward from the first mounting groove a certain distance, the stop block abuts against the fixed support wheel through a locking mechanism.

4. A laser tube cutting machine as described in claim 3, characterized in that, The locking mechanism includes: Gear, the gear being rotatably mounted within the first support; The first rack is fixed to the abutment and meshes with the gear; The second rack is fixed to the inner wall of the first mounting groove and meshes with the gear; When the first support slides in the first mounting groove, the gear rolls on the second rack and drives the first rack and the abutment to move on the slide rail.

5. A laser tube cutting machine as described in claim 1, characterized in that, The first clamping unit and the second clamping unit are each provided with two first clamping parts, and the third clamping part is located between the two first clamping parts.

6. A laser tube cutting machine as described in claim 1, characterized in that, The power mechanism includes a gear ring fixed on the base cylinder and a second motor fixed inside the housing. A gear that meshes with the gear ring is fixed on the output shaft of the second motor. The base cylinder is rotatably mounted inside the housing via a slewing bearing.

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