Automatic laser pipe cutting machine

Abstract

The invention relates to the technical field of laser cutting, in particular to an automatic laser pipe cutting machine which comprises a base, a supporting arm is fixedly mounted on the base, a mounting base is slidably mounted at one end of the supporting arm through an elastic assembly, and a mounting groove is formed in the lower surface of the mounting base; a laser generating device body is installed in the installation groove through a sliding assembly, an L-shaped support is fixedly installed on the side face of the installation base, a triangular block is fixedly installed at the lower end of the support, and the inclined face of the triangular block faces the rotating center feeding machine base. The distance between the triangular block and the laser generating device body in the vertical direction is the focal distance of the laser generating device body. The height of the laser generating device body is adjusted, at the moment, the laser focus of the laser generating device body can be automatically adjusted to the surface of a pipe, laser energy can be most effectively absorbed by the pipe, efficient and high-quality cutting is achieved, and meanwhile slag is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of laser cutting, and in particular to an automatic laser tube cutting machine. Background Art

[0002] In modern industrial production, pipe cutting is a common and important processing procedure. With the development of laser technology, laser pipe cutting machines are gradually being used. Laser pipe cutting machines are machines that can cut pipes using high-power density laser beams. The focused high-power density laser beam has a lot of energy, and the workpiece is cut and separated by irradiating the beam onto the workpiece surface.

[0003] A Chinese patent with publication number CN218695037U discloses a laser tube cutting machine, including a frame assembly, a rotating center feeder base, a laser cutting assembly, a telescopic sliding mechanism, and a pulling mechanism. It can realize automatic feeding, pull the material according to a preset length and laser cut it. It has a high degree of automation, a compact and simple structure, and high tube cutting efficiency.

[0004] In the above patent document, when cutting the tube, the laser focus of the laser generating device cannot be automatically adjusted to the ideal cutting position of the tube. If the focus position is not appropriate, it will lead to uneven distribution of laser energy, unsatisfactory melting state of the tube, and more slag will be generated. Summary of the invention

[0005] The purpose of the present invention is to solve the following shortcomings in the prior art: the laser focus of the laser generating device cannot be automatically adjusted to the ideal cutting position of the pipe. If the focus position is not appropriate, it will cause uneven laser energy distribution, unsatisfactory melting state of the pipe, and produce more slag, and thus an automatic laser pipe cutting machine is proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An automated laser tube cutting machine comprises a base, a rotating central feeder base is fixedly mounted on the base, a support arm is fixedly mounted on the base, a mounting seat is slidably mounted on one end of the support arm through an elastic component, a mounting groove is provided on the lower surface of the mounting seat, and a laser generating device body is mounted in the mounting groove through a sliding component;

[0008] The support arm is provided with a lifting slot in the vertical direction, the elastic component comprises a lifting block vertically slidably installed in the lifting slot and a return spring fixedly installed on the upper surface of the lifting block, the upper end of the return spring is fixedly connected to the inner wall of the lifting slot, and the lifting block is fixedly connected to the mounting seat;

[0009] An L-shaped bracket is fixedly mounted on the side of the mounting seat, and a triangular block is fixedly mounted on the lower end of the bracket, with the inclined surface of the triangular block facing the rotating center feeder seat.

[0010] As a preferred solution, the vertical distance between the lowermost end of the triangle block and the lowermost end of the laser generating device body is the focal distance of the laser generating device body.

[0011] As a preferred solution, the inner walls on both sides of the installation groove are symmetrically provided with sliding grooves, and the sliding assembly includes two sliding blocks respectively slidably installed in the two sliding grooves and a first telescopic spring fixedly installed on the upper end of the laser generating device body, and the first telescopic spring is fixedly connected to the inner wall of the installation groove at one end away from the laser generating device body.

[0012] As a preferred solution, a spring rod with a rectangular longitudinal section is fixedly installed on the side of the laser generating device body, a baffle rod is fixedly installed on the end of the spring rod away from the laser generating device body, and a positioning block with a right-angled trapezoidal longitudinal section is fixedly installed on the lower end of the baffle rod, and the inclined surface of the positioning block is tilted upward and toward the rotating center feed base.

[0013] As a preferred solution, the inner walls of the two slide grooves are provided with a card slot, and the end of the slider away from the main body of the laser generating device is provided with a rectangular groove, and a card block is slidably installed in the rectangular groove through a second telescopic spring seal, and the positioning block is provided with a transmission component for simultaneously driving the two card blocks to move into the rectangular groove.

[0014] As a preferred solution, a cavity is provided inside the positioning block, and the transmission assembly includes a sealing plate sealed and horizontally slidably installed in the cavity, a third telescopic spring fixedly installed on the sealing plate, a moving component for driving the sealing plate to move horizontally, a connecting tube fixedly installed on the positioning block, and a double-headed adapter tube fixedly installed at one end of the connecting tube, one end of the connecting tube is connected to the interior of the cavity, and the connection point between the connecting tube and the cavity is located on the side of the sealing plate away from the third telescopic spring, both ends of the double-headed adapter tube are respectively connected to two sliders and connected to the rectangular groove, and a pressure relief hole connected to the cavity is provided at one end of the positioning block.

[0015] As a preferred solution, the inclined surface of the positioning block is provided with two movable holes, and the movable component includes two movable rods respectively installed horizontally and slidingly in the two movable holes and a guide plate fixedly installed at one end of the two movable rods, and the ends of the two movable rods away from the guide plate are fixedly connected to the sealing plate, and the guide plate is parallel to the inclined surface of the positioning block.

[0016] As a preferred solution, a rectangular block is fixedly mounted on the side of the mounting seat, a rectangular cavity is opened inside the rectangular block, a nitrogen delivery pipe connected to the rectangular cavity is mounted on the upper end of the rectangular block, and an injection pipe connected to the rectangular cavity is mounted on the lower end of the rectangular block, and one end of the injection pipe points to the pipe cutting position.

[0017] As a preferred solution, a partition is fixedly installed in the rectangular cavity, a circular hole is opened in the middle of the partition, a frustum-shaped block is provided inside the rectangular cavity, and a connecting component for driving the block to move up and down is provided on the main body of the laser generating device.

[0018] As a preferred solution, a through hole connected to the interior of the rectangular cavity is opened at the lower end of the rectangular block, and the connecting component includes an L-shaped connecting rod fixedly installed on the side of the laser generating device body, one end of the connecting rod passes through the through hole and is fixedly connected to the blocking block, and the connecting rod is in sealed sliding contact with the inner wall of the through hole.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. When the rotating center feeder base is feeding the pipe, one end of the pipe will first contact the inclined surface of the triangular block. Under the action of the elastic component, the mounting base and the laser generator body can be driven to move upward on the support arm until the lower end of the triangular block contacts the surface of the pipe, thereby adjusting the height of the laser generator body. At this time, the laser focus of the laser generator body will automatically adjust to the surface of the pipe, and the laser energy can be most effectively absorbed by the pipe, achieving efficient and high-quality cutting, while effectively reducing the generation of slag.

[0021] 2. The main body of the laser generator is installed in the installation groove through the slider. At the same time, under the action of the elastic force of the second telescopic spring, the card block is connected to the card slot, which can lock the main body of the laser generator to avoid the position of the main body of the laser generator from shifting during the cutting process, thereby ensuring the stability of the device during use.

[0022] 3. When the wall of the pipe to be cut is thicker, the focal position should be slightly lower than the surface of the pipe. When the rotating center feeder base feeds the pipe, one end of the pipe will contact the inclined surface of the positioning block. The slider is unlocked through the transmission assembly. At the same time, the positioning block, spring rod and stop rod cooperate with each other to drive the main body of the laser generator to move toward the pipe, so that the laser focal position of the main body of the laser generator moves to a position lower than the surface of the pipe to ensure that the laser energy can penetrate the entire thickness of the pipe.

[0023] 4. The nitrogen delivery pipe is connected to an external nitrogen source. When laser cutting the pipe, nitrogen can be sprayed to the cutting part of the pipe through the cooperation of the nitrogen delivery pipe, rectangular block and jet pipe. Nitrogen is an inert gas. During the cutting process, it mainly prevents the oxidation and cooling of the material. At the same time, it can effectively blow away the slag and keep the cutting surface clean.

[0024] 5. When cutting pipes of different thicknesses, the block can be driven to move up and down in the circular hole through the connecting assembly to control the gap between the block and the partition, thereby controlling the amount of nitrogen ejected to avoid waste of nitrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the front three-dimensional cross-sectional structure of an automatic laser tube cutting machine proposed by the present invention;

[0026] Figure 2 It is a three-dimensional structural diagram of the support arm, the mounting base, the laser generating device body and the pipe;

[0027] Figure 3 It is a schematic diagram of a three-dimensional partial cross-sectional structure of a mounting seat, an elastic component, a laser generating device body, a spring rod, a positioning block and a pipe;

[0028] Figure 4 It is a schematic diagram of a three-dimensional partial cross-section structure of a stopper rod and a positioning block;

[0029] Figure 5 It is a schematic diagram of a three-dimensional partial cross-section structure of a mounting seat, a laser generating device body, a sliding assembly and an air jet pipe;

[0030] Figure 6 for Figure 5 The enlarged structural diagram at A in the middle;

[0031] Figure 7 It is a schematic diagram of the front cross-sectional structure of the mounting base and the main body of the laser generating device;

[0032] Figure 8 for Figure 7 The enlarged structural diagram at B in the middle;

[0033] Fig. 9 It is a schematic diagram of the three-dimensional cross-sectional structure of the nitrogen delivery pipe, the injection pipe and the rectangular block.

[0034] In the figure: 1 base, 2 rotating center feeder base, 3 support arm, 4 mounting seat, 5 laser generating device body, 6 bracket, 7 triangular block, 8 lifting block, 9 return spring, 10 slide groove, 11 slider, 12 first telescopic spring, 13 spring rod, 14 blocking rod, 15 positioning block, 16 slot, 17 rectangular slot, 18 second telescopic spring, 19 block, 20 cavity, 21 sealing plate, 22 third telescopic spring, 23 connecting pipe, 24 double-head transfer pipe, 25 moving rod, 26 guide plate, 27 rectangular block, 28 rectangular cavity, 29 nitrogen delivery pipe, 30 jet pipe, 31 partition, 32 blocking block, 33 connecting rod. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] Reference Figure 1-Figure 9 An automatic laser tube cutting machine comprises a base 1, on which a rotating center feeder base 2 is fixedly mounted. The rotating center feeder base 2 is disclosed in a Chinese patent with publication number CN218695037U and subject name of a laser tube cutting machine, and is not described in detail herein. A support arm 3 is fixedly mounted on the base 1, and a mounting seat 4 is slidably mounted on one end of the support arm 3 through an elastic component. A mounting groove is provided on the lower surface of the mounting seat 4, and a laser generating device body 5 is installed in the mounting groove through a sliding component. A lifting groove is provided in the vertical direction of the support arm 3, and the elastic component comprises a lifting block 8 vertically slidably mounted in the lifting groove and a reset spring 9 fixedly mounted on the upper surface of the lifting block 8, the upper end of the reset spring 9 is fixedly connected to the inner wall of the lifting groove, and the lifting block 8 is fixedly connected to the mounting seat 4.

[0037] The laser generating device body 5 is installed on the base 1 through the mounting seat 4, the lifting block 8, the reset spring 9 and the support arm 3. The laser generating device body 5 can move up and down on the support arm 3 through the lifting block 8 and the reset spring 9. At the same time, under the action of the elastic force of the reset spring 9, the initial position of the lifting block 8 is located at the bottom of the lifting slot.

[0038] An L-shaped bracket 6 is fixedly installed on the side of the mounting seat 4, and a triangular block 7 is fixedly installed on the lower end of the bracket 6. The inclined surface of the triangular block 7 faces the rotating center feeder base 2, and the vertical distance between the lowermost end of the triangular block 7 and the lowermost end of the laser generating device body 5 is the focal distance of the laser generating device body 5.

[0039] When the rotating center feeder base 2 is feeding the pipe, it will drive one end of the pipe to move toward the direction of the triangular block 7 and contact the inclined surface of the triangular block 7. Under the action of the inclined surface of the triangular block 7, it will drive the mounting base 4 to move vertically upward through the bracket 6, and the lifting block 8 moves upward in the lifting groove. At the same time, the reset spring 9 is compressed. At this time, the laser generating device body 5 is driven to move upward through the mounting base 4 until the lower end of the triangular block 7 contacts the outer surface of the pipe. Since the vertical distance between the lower end of the triangular block 7 and the lower end of the laser generating device body 5 is the focal distance of the laser generating device body 5, the laser focus of the laser generating device body 5 is automatically adjusted to the surface of the pipe.

[0040] The inner walls on both sides of the installation groove are symmetrically provided with sliding grooves 10. The sliding assembly includes two sliders 11 respectively slidably installed in the two sliding grooves 10 and a first telescopic spring 12 fixedly installed on the upper end of the laser generating device body 5. The first telescopic spring 12 is fixedly connected to the inner wall of the installation groove at one end away from the laser generating device body 5. The two sliders 11 are installed on both sides of the laser generating device body 5 and can move up and down in the installation groove.

[0041] A spring rod 13 with a rectangular longitudinal section is fixedly installed on the side of the laser generating device body 5, a baffle 14 is fixedly installed on one end of the spring rod 13 away from the laser generating device body 5, and a positioning block 15 with a right-angled trapezoidal longitudinal section is fixedly installed on the lower end of the baffle 14, and the inclined surface of the positioning block 15 is tilted upward and toward the rotating center feeder base 2.

[0042] The laser focus position has a crucial impact on the cutting quality. When the laser focus is located at the ideal cutting position of the pipe, the laser energy can be most effectively absorbed by the pipe, achieving efficient and high-quality cutting. If the focus position is too high or too low, it will lead to unreasonable laser energy distribution, reduced cutting quality, and problems such as rough incisions, excessive slag, and slow cutting speed. The laser focus position of the laser generating device body 5 is related to the thickness of the pipe, because pipes of different thicknesses require different energy distributions to achieve good cutting. For thinner pipes, the focus may need to be closer to the surface of the pipe, so that there is less slag and a smooth cut surface during the cutting process. For thicker pipes, the focus position is usually required to be appropriately deep inside the pipe to ensure that the laser energy can penetrate the entire thickness of the pipe.

[0043] There is a certain distance between the upper end of the positioning block 15 and the lower end of the triangular block 7 in the vertical direction. When the wall of the tube is thin, one end of the tube will not contact the positioning block 15 during the feeding process, but will directly contact the baffle 14. When the wall of the tube is thick, one end of the tube will contact the inclined surface of the positioning block 15 during the feeding process. Under the action of the inclined surface, the positioning block 15 will drive the laser generating device body 5 to move vertically downward in the installation groove through the baffle 14 and the spring rod 13, thereby driving the laser focus of the laser generating device body 5 to move downward, so that the focus position is appropriately deep into the tube.

[0044] A card slot 16 is provided on the inner walls of the two slide grooves 10, and a rectangular groove 17 is provided at the end of the slider 11 away from the laser generating device body 5. A card block 19 is sealed and slidably installed in the rectangular groove 17 through a second telescopic spring 18. The positioning block 15 is provided with a transmission component for simultaneously driving the two card blocks 19 to move into the rectangular groove 17. A closed space is formed between the card block 19 and the rectangular groove 17. When cutting thinner pipes, the card block 19 is clamped in the card slot 16 under the action of the elastic force of the second telescopic spring 18, which can lock the laser generating device body 5 to avoid the position of the laser generating device body 5 from shifting during the cutting process, thereby ensuring the stability of the device during use.

[0045] When thicker pipes are cut, the block 19 is driven to be withdrawn from the slot 16 by the transmission assembly, thereby releasing the lock on the laser generating device body 5 and driving the laser generating device body 5 to move downward.

[0046] A cavity 20 is opened inside the positioning block 15, and the transmission assembly includes a sealing plate 21 sealed and horizontally slidably installed in the cavity 20, a third telescopic spring 22 fixedly installed on the sealing plate 21, a moving component for driving the sealing plate 21 to move horizontally, a connecting pipe 23 fixedly installed on the positioning block 15, and a double-headed adapter tube 24 fixedly installed at one end of the connecting pipe 23, one end of the connecting pipe 23 is connected to the inside of the cavity 20, and the connection point between the connecting pipe 23 and the cavity 20 is located on the side of the sealing plate 21 away from the third telescopic spring 22, and the two ends of the double-headed adapter tube 24 are respectively connected to the two sliders 11 and are connected to the rectangular groove 17.

[0047] The sealing plate 21 divides the cavity 20 into two parts. The space of the sealing plate 21 away from the third telescopic spring 22 is connected to the space of the rectangular groove 17 through the connecting tube 23 and the double-head adapter tube 24. When the sealing plate 21 moves toward the third telescopic spring 22 in the cavity 20, the space between the sealing plate 21 and the left side of the cavity 20 becomes larger. At this time, the air in the rectangular groove 17 will be extracted through the connecting tube 23 and the double-head adapter tube 24. Under atmospheric pressure, the block 19 will move into the rectangular groove 17, and the second telescopic spring 18 will be compressed. At this time, the block 19 will move out of the slot 16 to release the lock on the laser generating device body 5.

[0048] The inclined surface of the positioning block 15 is provided with two moving holes, and the moving parts include two moving rods 25 respectively installed in the two moving holes for horizontal sliding and a guide plate 26 fixedly installed at one end of the two moving rods 25. The ends of the two moving rods 25 away from the guide plate 26 are fixedly connected to the sealing plate 21. The guide plate 26 is parallel to the inclined surface of the positioning block 15. When the pipe moves toward the positioning block 15, it will contact the guide plate 26 on the positioning block 15. The elastic coefficient of the first telescopic spring 12 is greater than the elastic coefficient of the third telescopic spring 22, so that the guide plate 26 will first drive the sealing plate 21 to move in the direction of the third telescopic spring 22 in the cavity 20 through the moving rod 25, until the guide plate 26 can no longer move, the positioning block 15 will move downward along the inclined surface of the guide plate 26.

[0049] A rectangular block 27 is fixedly mounted on the side of the mounting seat 4, and a rectangular cavity 28 is opened inside the rectangular block 27. A nitrogen delivery pipe 29 connected to the rectangular cavity 28 is installed at the upper end of the rectangular block 27, and an injection pipe 30 connected to the rectangular cavity 28 is installed at the lower end of the rectangular block 27. One end of the injection pipe 30 points to the pipe cutting position, and the end of the nitrogen delivery pipe 29 away from the rectangular block 27 is connected to an external nitrogen source (the external nitrogen source is a prior art and is not shown in the figure). When the pipe is laser cut, nitrogen is sprayed to the cutting position of the pipe through the nitrogen delivery pipe 29, the rectangular block 27 and the injection pipe 30. Nitrogen is an inert gas. During the cutting process, it mainly plays a role in preventing oxidation and cooling of the material. At the same time, it can effectively blow away the slag to keep the cleanliness of the cutting surface.

[0050] A partition 31 is fixedly installed in the rectangular cavity 28, and a circular hole is opened in the middle part of the partition 31. A frustum-shaped block 32 is provided inside the rectangular cavity 28. A connecting component for driving the block 32 to move up and down is provided on the laser generating device body 5. A through hole connected to the inside of the rectangular cavity 28 is opened at the lower end of the rectangular block 27. The connecting component includes an L-shaped connecting rod 33 fixedly installed on the side of the laser generating device body 5. One end of the connecting rod 33 passes through the through hole and is fixedly connected to the block 32. The connecting rod 33 is in sealed sliding contact with the inner wall of the through hole.

[0051] One end of the block 32 is inserted into the through hole. Since the block 32 is a frustum, the higher the height of the block 32, the smaller the gap between the block 32 and the partition 31. When the block 19 is engaged in the slot 16, the gap between the block 32 and the partition 31 is the smallest. When the laser generating device body 5 moves vertically downward, the block 32 can be driven to move vertically downward by the connecting rod 33. The size of the gap between the block 32 and the partition 31 can be controlled according to the thickness of the pipe wall, thereby controlling the amount of nitrogen ejected to avoid nitrogen waste.

[0052] In the present invention, when cutting the pipe, the material is fed by rotating the central feeder base 2, driving one end of the pipe to contact the triangular block 7. Under the action of the inclined surface of the triangular block 7, one end of the mounting base 4 on the support arm 3 can be driven to move upward, and the reset spring 9 is compressed until the lower end of the triangular block 7 contacts the outer surface of the pipe. Since the vertical distance between the lower end of the triangular block 7 and the lower end of the laser generating device body 5 is the focal distance of the laser generating device body 5, the laser focus of the laser generating device body 5 is automatically adjusted to the surface of the pipe. During cutting, the laser energy emitted by the laser generating device body 5 can be most effectively absorbed by the pipe, thereby achieving efficient and high-quality cutting and effectively reducing the generation of slag.

[0053] During the process of feeding the pipe, when the wall of the pipe is thin, the thickness is less than the vertical distance between the lower end of the triangular block 7 and the upper end of the positioning block 15. One end of the pipe does not contact the positioning block 15, but directly contacts the baffle 14. When the pipe is thin, the laser focus of the laser generating device body 5 can be located on the outer surface of the pipe.

[0054] When the wall of the tube is thicker, the thickness is greater than the vertical distance between the lower end of the triangular block 7 and the upper end of the positioning block 15. During the feeding process, one end of the tube will contact the guide plate 26 installed on the positioning block 15. The block 19 can be driven out of the slot 16 through the transmission assembly to release the lock on the laser generating device body 5. At this time, the laser generating device body 5 can be moved vertically downward in the installation slot through the positioning block 15, so that the laser focus position of the laser generating device body 5 is moved to a position lower than the surface of the tube to ensure that the laser energy can penetrate the entire thickness of the tube.

[0055] At the same time, during the cutting process, nitrogen is sprayed toward the cutting part of the pipe through the nitrogen delivery pipe 29, the rectangular block 27 and the injection pipe 30. Nitrogen is an inert gas. During the cutting process, it mainly plays the role of preventing oxidation and cooling of the material. At the same time, it can effectively blow away the slag and keep the cleanliness of the cutting surface.

[0056] Furthermore, when the laser generating device body 5 moves downward according to the thickness of the pipe wall, the size of the gap between the block 32 and the partition 31 can be controlled by the connecting rod 33, thereby controlling the ejection amount of nitrogen to avoid waste of nitrogen.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automated laser tube cutting machine, comprising a base (1), characterized in that: A rotating central feeder base (2) is fixedly mounted on the base (1), a support arm (3) is fixedly mounted on the base (1), a mounting seat (4) is slidably mounted on one end of the support arm (3) via an elastic component, a mounting groove is provided on the lower surface of the mounting seat (4), and a laser generating device body (5) is mounted in the mounting groove via a sliding component; The support arm (3) is provided with a lifting slot in the vertical direction, the elastic component comprises a lifting block (8) vertically slidably mounted in the lifting slot and a return spring (9) fixedly mounted on the upper surface of the lifting block (8), the upper end of the return spring (9) is fixedly connected to the inner wall of the lifting slot, and the lifting block (8) is fixedly connected to the mounting seat (4); An L-shaped bracket (6) is fixedly mounted on the side of the mounting seat (4), a triangular block (7) is fixedly mounted on the lower end of the bracket (6), and the inclined surface of the triangular block (7) faces the rotating central feeder seat (2).

2. The automatic laser tube cutting machine according to claim 1, characterized in that: The vertical distance between the lowermost end of the triangular block (7) and the lowermost end of the laser generating device body (5) is the focal distance of the laser generating device body (5).

3. The automatic laser tube cutting machine according to claim 1, characterized in that: The inner walls on both sides of the installation groove are symmetrically provided with sliding grooves (10), and the sliding assembly includes two sliding blocks (11) respectively slidably installed in the two sliding grooves (10) and a first telescopic spring (12) fixedly installed on the upper end of the laser generating device body (5), and the first telescopic spring (12) is fixedly connected to the inner wall of the installation groove at one end away from the laser generating device body (5).

4. The automatic laser tube cutting machine according to claim 3, characterized in that: A spring rod (13) with a rectangular longitudinal section is fixedly installed on the side of the laser generating device body (5), a blocking rod (14) is fixedly installed on one end of the spring rod (13) away from the laser generating device body (5), and a positioning block (15) with a right-angle trapezoidal longitudinal section is fixedly installed on the lower end of the blocking rod (14), and the inclined surface of the positioning block (15) is inclined upward and toward the rotating center feed machine base (2).

5. The automatic laser tube cutting machine according to claim 4, characterized in that: The inner walls of the two slide grooves (10) are each provided with a card slot (16); the end of the slider (11) away from the laser generating device body (5) is provided with a rectangular slot (17); a card block (19) is sealed and slidably installed in the rectangular slot (17) via a second telescopic spring (18); and the positioning block (15) is provided with a transmission component for simultaneously driving the two card blocks (19) to move into the rectangular slot (17).

6. The automatic laser tube cutting machine according to claim 5, characterized in that: A cavity (20) is provided inside the positioning block (15), and the transmission assembly comprises a sealing plate (21) sealed and horizontally slidably mounted in the cavity (20), a third telescopic spring (22) fixedly mounted on the sealing plate (21), a moving component for driving the sealing plate (21) to move horizontally, a connecting pipe (23) fixedly mounted on the positioning block (15), and a double-ended transfer pipe (24) fixedly mounted on one end of the connecting pipe (23), one end of the connecting pipe (23) being connected to the inside of the cavity (20), a connection point between the connecting pipe (23) and the cavity (20) being located on a side of the sealing plate (21) away from the third telescopic spring (22), two ends of the double-ended transfer pipe (24) being respectively connected to two sliders (11) and being connected to the rectangular groove (17), and a pressure relief hole connected to the cavity (20) is provided at one end of the positioning block (15).

7. The automatic laser tube cutting machine according to claim 6, characterized in that: The inclined surface of the positioning block (15) is provided with two moving holes, and the moving component comprises two moving rods (25) respectively installed in the two moving holes for horizontal sliding, and a guide plate (26) fixedly installed at one end of the two moving rods (25), and the ends of the two moving rods (25) away from the guide plate (26) are fixedly connected to the sealing plate (21), and the guide plate (26) is parallel to the inclined surface of the positioning block (15).

8. The automatic laser tube cutting machine according to claim 1, characterized in that: A rectangular block (27) is fixedly mounted on the side of the mounting seat (4), a rectangular cavity (28) is provided inside the rectangular block (27), a nitrogen delivery pipe (29) connected to the rectangular cavity (28) is mounted on the upper end of the rectangular block (27), and an injection pipe (30) connected to the rectangular cavity (28) is mounted on the lower end of the rectangular block (27), one end of the injection pipe (30) points to the pipe cutting position.

9. The automatic laser tube cutting machine according to claim 8, characterized in that: A partition (31) is fixedly installed in the rectangular cavity (28), a circular hole is opened in the middle of the partition (31), a frustum-shaped block (32) is arranged inside the rectangular cavity (28), and a connecting component for driving the block (32) to move up and down is arranged on the main body (5) of the laser generating device.

10. The automatic laser tube cutting machine according to claim 9, characterized in that: A through hole communicating with the interior of the rectangular cavity (28) is provided at the lower end of the rectangular block (27); the connecting assembly comprises an L-shaped connecting rod (33) fixedly mounted on the side of the laser generating device body (5); one end of the connecting rod (33) passes through the through hole and is fixedly connected to the blocking block (32); the connecting rod (33) is in sealed sliding contact with the inner wall of the through hole.

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