A laser cutting apparatus

Abstract

The application relates to the technical field of laser cutting, in particular to a laser cutting device which comprises an operation table, two supporting rollers for supporting a pipe material are rotationally connected above the operation table, a rotating shaft is arranged above the operation table, a four-jaw chuck for clamping the end of the pipe material is fixedly connected to the rotating shaft, a driving structure for driving the rotating shaft to rotate and move in the vertical direction is installed on the operation table, and a laser cutting mechanism for laser cutting the pipe material is installed on the operation table; when the driving structure drives the pipe material to rotate, the pipe material parts on both sides of the cutting station keep synchronous rotation at the same angular velocity, the design effectively avoids the cutting seam inconsistency, the end face spiral or the step caused by the inconsistent rotating speed of both sides, and significantly improves the flatness and perpendicularity of the cutting end face.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, and more particularly to a laser cutting device. Background Technology

[0002] Laser cutting equipment uses a high-energy-density laser beam to irradiate the surface of a workpiece, causing the material to melt and vaporize rapidly. The molten slag is then blown away with the help of auxiliary gas, thus achieving material separation. Among these applications, laser cutting of pipes is widely used in industries such as automobile manufacturing, pipeline engineering, and furniture processing.

[0003] Existing laser cutting equipment for pipes typically clamps the pipe onto a rotating chuck, which drives the entire pipe to rotate while the laser cutting head remains fixed or moves axially for cutting. However, this method has shortcomings in practical applications. When using a rotating chuck to cut the entire pipe, the pipe is driven by the same chuck, theoretically resulting in a consistent rotation speed. However, during the cutting of long pipes, especially when the cutting point is near the middle of the pipe, the pipe's torsional stiffness is limited. Combined with the effects of cutting thermal stress, this can easily lead to slight relative angular displacement on both sides of the cutting point, resulting in uneven cuts, spiral-shaped end faces, or steps, affecting the cutting quality. Furthermore, in existing equipment, molten slag generated when the laser penetrates the pipe wall falls into the pipe's interior during cutting, which is not only difficult to clean but may also interfere with the positioning accuracy of subsequent cuts.

[0004] Therefore, in order to solve the above problems, a more suitable facility that meets the needs of users is needed. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a laser cutting device to solve the problem that, during the cutting of long pipes, especially when the cutting point is close to the middle of the pipe, the torsional stiffness of the pipe itself is limited, and coupled with the influence of cutting thermal stress, small relative angular displacements can easily occur on both sides of the cutting point due to different angular velocities.

[0006] To achieve the above objectives, the present invention provides a laser cutting device, including an operating table, two support rollers for supporting tubes are rotatably connected above the operating table, a rotating shaft is provided above the operating table, a four-jaw chuck for clamping the end of the tube is fixedly connected to the rotating shaft, a drive structure for driving the rotating shaft to rotate and move vertically is installed on the operating table, and a laser cutting mechanism for laser cutting the tube is installed on the operating table.

[0007] A translation shaft runs through the rotating shaft, and an anti-rotation component that cooperates with the laser cutting mechanism is provided on the translation shaft. A fixed column is fixedly connected to the translation shaft, and an installation sleeve is fixedly fitted on the outside of the fixed column. A waste collection box for collecting molten slag is fixedly connected to the top of the installation sleeve. The installation sleeve is provided with a synchronous rotation fixing structure for fixing the portions of the pipe located on both sides of the cutting station. When the driving structure drives the rotating shaft and the four-jaw chuck to rotate, the synchronous rotation fixing structure causes the portions of the pipe on both sides of the cutting station to rotate synchronously so that the angular velocities of the pipes on both sides of the cutting station are the same. The translation shaft can be axially translated relative to the rotating shaft to move the waste collection box and the synchronous rotation fixing structure to different cutting stations.

[0008] Optionally, the laser cutting mechanism includes a support frame fixedly installed on the operating table, a translation seat slidably installed on the support frame, a translation component for driving the translation seat to translate on the support frame, a first electric push rod fixedly connected to the bottom of the translation seat, and a laser cutter fixedly connected to the telescopic end of the first electric push rod.

[0009] Optionally, the translation component includes a lead screw rotatably mounted on a support frame, the lead screw passing through a translation seat, and the connection between the lead screw and the translation seat is a threaded connection. A first servo motor is fixedly connected to the support frame, and the output end of the first servo motor is fixedly connected to the lead screw.

[0010] Optionally, the anti-rotation component includes a movable frame that is slidably mounted on the support frame, one end of the movable frame being fixedly connected to the translation seat, and the other end of the movable frame passing vertically through the translation axis.

[0011] Optionally, the synchronous rotation fixing structure includes a fixed shell that is fixedly installed on both sides of the mounting sleeve. A rotating sleeve is rotatably connected to the fixed shell and is fitted outside the fixed column. Two movable sleeves are fitted outside the fixed column, and the rotating sleeve is located between the two movable sleeves. Several swing arms are rotatably connected to the movable sleeves. Support sleeves are rotatably connected to the swing arms. A positioning strip for abutting against the inner wall of the pipe is fixedly connected to the support sleeve. An elastic element adapted to the positioning strip is installed on the rotating sleeve. A pushing element adapted to the movable sleeve is installed on the mounting sleeve. The two rotating sleeves are connected by a synchronization unit.

[0012] Optionally, the elastic element includes several first prisms fixedly installed on the rotating sleeve, and a support sleeve slidably sleeved on the outside of the corresponding first prism. The first prism has a groove, and a tension spring is provided in the groove. The two ends of the tension spring are fixedly connected to the positioning strip and the inner wall of the groove, respectively.

[0013] Optionally, the pushing component includes two support rings sleeved on the outside of the fixed column, and a movable sleeve located between the two support rings. The fixed column has two rectangular holes, and a movable block is slidably disposed in the rectangular holes. The movable block and the corresponding support ring are fixedly connected. A second electric push rod is fixedly connected to the mounting sleeve. A movable plate is fixedly connected to the telescopic end of the second electric push rod. The movable block and the movable plate are connected by a connecting rope, and the connecting rope passes through the fixed column and the mounting sleeve.

[0014] Optionally, the movable sleeve is rotatably connected with a plurality of balls, and the balls are in contact with the support ring.

[0015] Optionally, the synchronization unit includes a connecting shaft disposed below the mounting sleeve, the connecting shaft being rotatably connected to two fixed shells respectively, the outer fixed sleeve of the rotating sleeve being provided with a first gear located inside the fixed shell, and the two ends of the connecting shaft being fixedly connected with a second gear meshing with the first gear respectively.

[0016] Optionally, the drive structure includes a lifting seat and a support shell respectively rotatably sleeved outside the rotating shaft. The lifting seat passes through the operating table. A second prism is fixedly connected to the bottom of the support shell. A first sliding sleeve is slidably sleeved on the outside of the second prism, and the bottom end of the first sliding sleeve is fixedly connected to the operating table. A worm gear located inside the support shell is fixedly sleeved outside the rotating shaft. A worm gear meshing with the worm gear is rotatably connected inside the support shell. A third prism is fixedly connected to the bottom of the worm gear. A second sliding sleeve is slidably sleeved on the outside of the third prism. A second servo motor is fixedly connected to the operating table, and the output end of the second servo motor is fixedly connected to the second sliding sleeve. A positioning component adapted to the lifting seat is installed on the operating table.

[0017] Optionally, the positioning component includes a stop plate disposed on the operating table, the stop plate being in contact with the lifting seat, a third electric push rod being fixedly connected to the operating table, and the telescopic end of the third electric push rod being fixedly connected to the stop plate.

[0018] Optionally, a fixed sleeve is fitted around the translation axis, and the fixed sleeve is fixedly connected to the support shell. A guide groove is provided on the translation axis, and a guide strip is slidably provided in the guide groove, and the guide strip is fixedly connected to the fixed sleeve.

[0019] The beneficial effects of this invention are as follows: By using the synchronous rotation fixing structure installed on the mounting sleeve, the portions of the pipe located on both sides of the cutting station are synchronously fixed. When the drive structure drives the pipe to rotate, the pipe portions on both sides of the cutting station maintain the same angular velocity and rotate synchronously, avoiding relative angular displacement on both sides of the cutting point. This design effectively avoids uneven kerfs, spiral-shaped end faces, or steps caused by inconsistent rotation speeds on both sides, significantly improving the flatness and perpendicularity of the cutting end face. It is especially suitable for laser cutting of thin-walled pipes and precision pipes. When the high-temperature molten slag generated by laser cutting is sprayed downwards under the action of auxiliary gas, the slag falls directly into the waste collection box, realizing online and directional collection of molten slag. Compared with traditional open cutting platforms, this solution avoids... This design prevents molten slag from scattering inside the equipment or onto the worktable, reducing cleaning difficulty and extending equipment maintenance cycles. The translation shaft passes through the rotating shaft and is equipped with an anti-rotation component. After cutting, the operator can drive the translation shaft to move relative to the rotating shaft, moving the synchronous rotating fixing structure to the next preset cutting position on the pipe without re-clamping or adjusting the pipe position. This structure enables rapid switching and repeated positioning of multiple cutting positions on the same pipe, significantly improving the production efficiency of batch cutting. The rotating shaft is rotated by the drive structure, which, together with the four-jaw chuck clamping the pipe end and the synchronous rotating fixing structure automatically fixing and releasing both sides of the cutting position, allows the operator to complete only loading and unloading and advancing the translation shaft, reducing manual operation intensity and facilitating automated production. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this 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 for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is one of the overall structural schematic diagrams of an embodiment of the present invention;

[0022] Figure 2 This is a second schematic diagram of the overall structure of an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the pipe after it has been removed from the support roller according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the driving structure according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the internal structure of the support shell according to an embodiment of the present invention;

[0026] Figure 6This is a schematic diagram of the structure of the translation seat according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the translation axis and fixed column in an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the waste collection box after it has been removed from the mounting sleeve according to an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the internal structure of the fixed shell according to an embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of the disassembled elastic element according to an embodiment of the present invention;

[0031] Figure 11 This is a schematic diagram of the connecting rope in an embodiment of the present invention.

[0032] The diagram is marked as follows:

[0033] 1. Operating table; 2. Support roller; 3. Rotating shaft; 4. Four-jaw chuck; 5. Translation shaft; 6. Fixed column; 7. Mounting sleeve; 8. Waste collection box; 9. Translation seat; 10. Laser cutter; 11. First electric push rod; 12. Support frame; 13. First servo motor; 14. Lead screw; 15. Movable frame; 16. Movable sleeve; 17. Swing arm; 18. Support sleeve; 19. Positioning strip; 20. Rotating sleeve; 21. Fixed shell; 22. First prism; 23. Groove; 24. Tension spring; 25. First gear; 26. 1. Connecting shaft; 27. Second gear; 28. Support ring; 29. ​​Rectangular hole; 30. Movable block; 31. Movable plate; 32. Second electric push rod; 33. Connecting rope; 34. Ball bearing; 35. Lifting seat; 36. Support shell; 37. Worm gear; 38. Second prism; 39. First sliding sleeve; 40. Third prism; 41. Second sliding sleeve; 42. Second servo motor; 43. Stop plate; 44. Third electric push rod; 45. Fixed sleeve; 46. Guide bar; 47. Worm gear; 48. Guide groove; 50. Tube. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0035] Example 1, by Figure 1 , Figure 2 , Figure 3 and Figure 5The present invention includes an operating table 1, with two support rollers 2 rotatably connected above the operating table 1 for supporting the tube 50, a rotating shaft 3 provided above the operating table 1, a four-jaw chuck 4 fixedly connected to the rotating shaft 3 for clamping the end of the tube 50, a drive structure for driving the rotating shaft 3 to rotate and move vertically installed on the operating table 1, and a laser cutting mechanism for laser cutting the tube 50 installed on the operating table 1.

[0036] A translation shaft 5 passes through the rotating shaft 3. The translation shaft 5 is equipped with an anti-rotation component that cooperates with the laser cutting mechanism. A fixed column 6 is fixedly connected to the translation shaft 5. An installation sleeve 7 is fixedly fitted on the outside of the fixed column 6. A waste collection box 8 for collecting molten slag is fixedly connected to the top of the installation sleeve 7. The installation sleeve 7 is equipped with a synchronous rotation fixing structure for fixing the parts of the pipe 50 located on both sides of the cutting station. When the drive structure drives the rotating shaft 3 and the four-jaw chuck 4 to rotate, the synchronous rotation fixing structure makes the parts of the pipe 50 on both sides of the cutting station rotate synchronously so that the angular velocities of the pipe 50 on both sides of the cutting station are the same. The translation shaft 5 can be axially translated relative to the rotating shaft 3 to move the waste collection box 8 and the synchronous rotation fixing structure to different cutting stations.The operator places the tube 50 to be laser-cut above the two support rollers 2, which support the tube 50. The height of the four-jaw chuck 4 is adjusted via the drive structure, clamping the end of the tube 50. A synchronous rotation fixing structure is located inside the tube 50, fixing the portions of the tube 50 located on both sides of the cutting station. The drive structure then drives the rotating shaft 3, the four-jaw chuck 4, and the tube 50 to rotate, allowing the laser cutting mechanism to cut the tube 50. An anti-rotation component limits the position of the translation shaft 5, preventing it from rotating relative to the operating table 1. At this point, the synchronous rotation fixing structure drives the portions of the tube 50 located on both sides of the cutting station to achieve... Synchronous rotation causes molten slag from laser cutting to fall into the waste collection box 8. After laser cutting is completed, the synchronous rotation fixing structure releases the fixation of the pipes 50 located on both sides of the cutting station, allowing the operator to remove the cut pipes 50. The operator then drives the translation axis 5 to translate relative to the rotation axis 3, moving the synchronous rotation fixing structure to the next preset position. The synchronous rotation fixing structure then fixes the portion of the pipe 50 located on both sides of the next cutting station, allowing the next round of laser cutting to begin. This system can collect molten slag generated at different cutting stations and drive the pipes 50 located on both sides of the cutting station to rotate synchronously. Through the synchronous rotation fixing structure set on the mounting sleeve 7, the pipes 50 located on both sides of the cutting station are fixed. The sides are synchronously fixed, and when the drive structure rotates the tube 50, the tube 50 sections on both sides of the cutting station rotate synchronously at the same angular velocity, avoiding relative angular displacement on both sides of the cutting point. This design effectively avoids uneven kerfs, spiral-shaped end faces, or steps caused by inconsistent rotation speeds on both sides, significantly improving the flatness and perpendicularity of the cut end face. It is especially suitable for laser cutting of thin-walled tubes and precision tubes. When the high-temperature molten slag generated by laser cutting is sprayed downwards under the action of auxiliary gas, the slag falls directly into the waste collection box 8, realizing online and directional collection of slag. Compared with traditional open cutting platforms, this solution avoids slag scattering into the equipment or worktable, reducing cleaning difficulty. This design extends the equipment maintenance cycle. The translation axis 5 passes through the rotating axis 3 and is equipped with an anti-rotation component. After cutting, the operator can drive the translation axis 5 to translate relative to the rotating axis 3, moving the synchronous rotation fixing structure to the next preset cutting position on the pipe 50 without re-clamping or adjusting the position of the pipe 50. This structure enables rapid switching and repeated positioning of multiple cutting positions on the same pipe 50, significantly improving the production efficiency of batch cutting. The rotating axis 3 rotates via a drive structure, which, combined with the four-jaw chuck 4 clamping the end of the pipe 50 and the synchronous rotation fixing structure automatically fixing and releasing both sides of the cutting position, allows the operator to complete only loading / unloading and advancing the translation axis 5, reducing manual labor intensity and facilitating automated production.

[0037] Example 2, based on Example 1, is... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 The laser cutting mechanism includes a support frame 12 fixedly mounted on the operating table 1, a translation seat 9 slidably mounted on the support frame 12, a translation component for driving the translation seat 9 to translate on the support frame 12, a first electric push rod 11 fixedly connected to the bottom of the translation seat 9, a laser cutter 10 fixedly connected to the telescopic end of the first electric push rod 11, a lead screw 14 rotatably mounted on the support frame 12, the lead screw 14 passing through the translation seat 9, and the connection between the lead screw 14 and the translation seat 9 is a threaded connection, a first servo motor 13 fixedly connected on the support frame 12, and the output end of the first servo motor 13 fixedly connected to the lead screw 14, and an anti-rotation component including a movable frame 15 slidably mounted on the support frame 12, one end of the movable frame 15 fixedly connected to the translation seat 9, and the other end of the movable frame 15 vertically passing through the translation shaft 5;

[0038] The first servo motor 13 drives the lead screw 14 to rotate, which in turn drives the translation seat 9 to slide relative to the support frame 12. The translation seat 9 can then drive the laser cutter 10 to move to different cutting positions via the first electric push rod 11. The translation seat 9 also drives the movable frame 15 to slide relative to the support frame 12. The support frame 12 drives the translation shaft 5 and the fixed column 6 to move synchronously, which allows the synchronous rotating fixed structure to move to different cutting positions without the need for manual adjustment of the positions of the translation shaft 5 and the synchronous rotating fixed structure. Furthermore, the movable frame 15 limits the position of the translation shaft 5, preventing the translation shaft 5, the fixed column 6, and the mounting sleeve 7 from rotating and wobbling relative to the operating table 1. The laser cutter 10 can be adjusted to its initial height by driving the laser cutter 10 to move vertically via the first electric push rod 11.

[0039] Example 3, based on Example 1, is... Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11The synchronous rotation fixing structure includes fixed shells 21 fixedly installed on both sides of the mounting sleeve 7. A rotating sleeve 20 is rotatably connected to the fixed shell 21 and is sleeved on the outside of the fixed column 6. Two movable sleeves 16 are sleeved on the outside of the fixed column 6, and the rotating sleeve 20 is located between the two movable sleeves 16. Several swing arms 17 are rotatably connected to the movable sleeves 16, and support sleeves 18 are rotatably connected to the swing arms 17. A positioning strip 19 for abutting against the inner wall of the pipe 50 is fixedly connected to the support sleeve 18. An elastic element adapted to the positioning strip 19 is installed on the rotating sleeve 20. A pushing element adapted to the movable sleeve 16 is installed on the mounting sleeve 7. The two rotating sleeves 20 are connected by a synchronization unit. The elastic element includes several first prisms 22 fixedly installed on the rotating sleeve 20. The support sleeve 18 is slidably sleeved on the outside of the corresponding first prism 22. A groove 23 is opened on the first prism 22, and a tension spring 24 is provided in the groove 23. The two ends of the tension spring 24 are respectively connected to the positioning strip 19. The inner wall of groove 23 is fixedly connected to 9. The pushing component includes two support rings 28 sleeved on the outside of the fixed column 6, and the movable sleeve 16 is located between the two support rings 28. Two rectangular holes 29 are opened on the fixed column 6. A movable block 30 is slidably arranged in the rectangular holes 29. The movable block 30 and the corresponding support ring 28 are fixedly connected. A second electric push rod 32 is fixedly connected on the mounting sleeve 7. A movable plate 31 is fixedly connected to the telescopic end of the second electric push rod 32. The movable block 30 and the movable plate 31 are connected by a connecting rope 33, and the connecting rope 33 passes through the fixed column 6 and the mounting sleeve 7. Several balls 34 are rotatably connected on the movable sleeve 16, and the balls 34 are in contact with the support ring 28. The synchronization unit includes a connecting shaft 26 arranged below the mounting sleeve 7. The connecting shaft 26 is rotatably connected to two fixed shells 21 respectively. A first gear 25 located in the fixed shell 21 is fixedly sleeved on the outside of the rotating sleeve 20. A second gear 27 that meshes with the first gear 25 is fixedly connected to both ends of the connecting shaft 26 respectively.

[0040] The tension spring 24 applies tension to the positioning strip 19 and the support sleeve 18, so that the ball bearing 34 on the movable sleeve 16 and the support ring 28 are tightly attached. The movable plate 31 is driven to move by the second electric push rod 32. The movable plate 31 pulls the movable block 30 and the support ring 28 to move through the connecting rope 33. The support ring 28 can then drag the ball bearing 34 and the movable sleeve 16 to translate. The movable sleeve 16 drives the swing arm 17 to tilt. The swing arm 17 can then drive the support sleeve 18 and the positioning strip 19 to slide relative to the first prism 22, so that the positioning strip 19 is tightly attached to the inner wall of the pipe 50. The portions of the pipe 50 located on both sides of the cutting station are synchronously fixed by several positioning strips 19 located on both sides of the cutting station. When one of the rotating sleeves 20 rotates, the rotating sleeve 20 can be driven by the first gear 25 and the second gear 27 to connect. When shaft 26 rotates, it drives another rotating sleeve 20 to rotate synchronously through another set of first gear 25 and second gear 27, so that during the cutting process of pipe 50, the parts on both sides of the cutting station of pipe 50 always rotate synchronously. Positioning strip 19 can drive rotating sleeve 20 to rotate relative to fixed shell 21 and fixed column 6 through support sleeve 18 and first prism 22. Support sleeve 18 drives movable sleeve 16 and ball 34 to rotate relative to support ring 28 through swing arm 17. When the second electric push rod 32 drives movable plate 31 to move in the opposite direction, tension spring 24 pulls positioning strip 19 and support sleeve 18 to slide in the opposite direction relative to first prism 22. Swing arm 17 can push movable sleeve 16 and support ring 28 to slide in the opposite direction. Finally, several positioning strips 19 no longer fix the inner wall of pipe 50.

[0041] Example 4, based on Example 2, by Figure 2 , Figure 4 and Figure 5The drive structure includes a lifting seat 35 and a support shell 36, which are rotatably sleeved on the outside of the rotating shaft 3. The lifting seat 35 passes through the operating table 1. A second prism 38 is fixedly connected to the bottom of the support shell 36. A first sliding sleeve 39 is slidably sleeved on the outside of the second prism 38, and the bottom end of the first sliding sleeve 39 is fixedly connected to the operating table 1. A worm gear 37 located inside the support shell 36 is fixedly sleeved on the outside of the rotating shaft 3. A worm 47 meshing with the worm gear 37 is rotatably connected inside the support shell 36. A third prism 40 is fixedly connected to the bottom of the worm 47. A second sliding sleeve 41 is slidably sleeved on the outside of the third prism 40. A second prism 40 is fixedly connected to the operating table 1. A servo motor 42 is provided, and the output end of the second servo motor 42 is fixedly connected to the second sliding sleeve 41. A positioning component adapted to the lifting seat 35 is installed on the operating table 1. The positioning component includes a stop plate 43 set on the operating table 1. The stop plate 43 is in contact with the lifting seat 35. A third electric push rod 44 is fixedly connected to the operating table 1, and the telescopic end of the third electric push rod 44 is fixedly connected to the stop plate 43. A fixed sleeve 45 is sleeved on the outside of the translation shaft 5, and the fixed sleeve 45 is fixedly connected to the support shell 36. A guide groove 48 is opened on the translation shaft 5, and a guide strip 46 is slidably provided in the guide groove 48. The guide strip 46 is fixedly connected to the fixed sleeve 45.

[0042] When the height of the four-jaw chuck 4 needs to be adjusted according to the specifications of the pipe 50, the stop plate 43 is driven to move horizontally by the third electric push rod 44, so that the stop plate 43 no longer presses against the lifting seat 35, releasing the fixation of the lifting seat 35. The operator can then drive the lifting seat 35 and the rotating shaft 3 to move vertically relative to the operating table 1, changing the initial height of the four-jaw chuck 4. The end of the pipe 50 can then be clamped and fixed by the four-jaw chuck 4. The rotating shaft 3 drives the translation shaft 5 and the support shell 36 to move vertically synchronously. The translation shaft 5 slides vertically relative to the movable frame 15, and the support shell 36 drives the second prism. 38 slides relative to the first sliding sleeve 39, and the support shell 36 and worm gear 47 drive the third prism 40 to slide relative to the second sliding sleeve 41. Finally, the stop plate 43 is driven by the third electric push rod 44 to press against the lifting seat 35 again, so that the lifting seat 35 and the four-jaw chuck 4 are fixed at the preset height. The second servo motor 42 drives the second sliding sleeve 41, the third prism 40 and the worm gear 47 to rotate. The worm gear 47 can drive the rotating shaft 3 and the four-jaw chuck 4 to rotate through the worm wheel 37. Through the design of the fixed sleeve 45, the guide bar 46 and the guide groove 48, the possibility of the translation shaft 5 rotating is reduced.

[0043] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

Claims

1. A laser cutting device, comprising an operating table (1), characterized in that, Two support rollers (2) for supporting the tube (50) are rotatably connected above the operating table (1). A rotating shaft (3) is provided above the operating table (1). A four-jaw chuck (4) for clamping the end of the tube (50) is fixedly connected to the rotating shaft (3). A drive structure for driving the rotating shaft (3) to rotate and move vertically is installed on the operating table (1). A laser cutting mechanism for laser cutting the tube (50) is installed on the operating table (1). A translation shaft (5) runs through the rotating shaft (3). The translation shaft (5) is equipped with an anti-rotation component that cooperates with the laser cutting mechanism. A fixed column (6) is fixedly connected to the translation shaft (5). An installation sleeve (7) is fixedly fitted on the outside of the fixed column (6). A waste collection box (8) for collecting molten slag is fixedly connected to the top of the installation sleeve (7). A synchronous rotation fixing structure for fixing the pipe (50) located on both sides of the cutting station is provided on the installation sleeve (7). When the driving structure drives the rotating shaft (3) and the four-jaw chuck (4) to rotate, the synchronous rotation fixing structure makes the pipe (50) on both sides of the cutting station rotate synchronously so that the angular velocity of the pipe (50) on both sides of the cutting station is the same. The translation shaft (5) can be axially translated relative to the rotating shaft (3) to move the waste collection box (8) and the synchronous rotation fixing structure to different cutting stations.

2. The laser cutting equipment according to claim 1, characterized in that, The laser cutting mechanism includes a support frame (12) fixedly installed on the operating table (1), a translation seat (9) slidably installed on the support frame (12), a translation component for driving the translation seat (9) to translate on the support frame (12), a first electric push rod (11) fixedly connected to the bottom of the translation seat (9), and a laser cutter (10) fixedly connected to the telescopic end of the first electric push rod (11).

3. The laser cutting equipment according to claim 2, characterized in that, The translation component includes a lead screw (14) rotatably mounted on a support frame (12), the lead screw (14) passes through the translation seat (9), and the connection between the lead screw (14) and the translation seat (9) is a threaded connection. A first servo motor (13) is fixedly connected to the support frame (12), and the output end of the first servo motor (13) is fixedly connected to the lead screw (14).

4. The laser cutting equipment according to claim 2, characterized in that, The anti-rotation component includes a movable frame (15) that is slidably mounted on the support frame (12). One end of the movable frame (15) is fixedly connected to the translation seat (9), and the other end of the movable frame (15) passes vertically through the translation axis (5).

5. The laser cutting equipment according to claim 1, characterized in that, The synchronous rotation fixing structure includes a fixed shell (21) fixedly installed on both sides of the mounting sleeve (7). A rotating sleeve (20) is rotatably connected to the fixed shell (21), and the rotating sleeve (20) is sleeved on the outside of the fixed column (6). Two movable sleeves (16) are sleeved on the outside of the fixed column (6), and the rotating sleeve (20) is located between the two movable sleeves (16). Several swing arms (17) are rotatably connected to the movable sleeves (16), and a support sleeve (18) is rotatably connected to the swing arms (17). A positioning strip (19) for abutting against the inner wall of the pipe (50) is fixedly connected to the support sleeve (18). An elastic element adapted to the positioning strip (19) is installed on the rotating sleeve (20). A pushing element adapted to the movable sleeve (16) is installed on the mounting sleeve (7). The two rotating sleeves (20) are connected by a synchronous unit.

6. The laser cutting equipment according to claim 5, characterized in that, The elastic element includes several first prisms (22) fixedly installed on the rotating sleeve (20), and a support sleeve (18) slidably sleeved on the outside of the corresponding first prism (22). The first prism (22) has a groove (23) and a tension spring (24) is provided in the groove (23). The two ends of the tension spring (24) are fixedly connected to the positioning strip (19) and the inner wall of the groove (23) respectively.

7. The laser cutting equipment according to claim 5, characterized in that, The pusher includes two support rings (28) sleeved on the outside of the fixed column (6), and the movable sleeve (16) is located between the two support rings (28). The fixed column (6) has two rectangular holes (29). A movable block (30) is slidably provided in the rectangular holes (29). The movable block (30) and the corresponding support ring (28) are fixedly connected. A second electric push rod (32) is fixedly connected on the mounting sleeve (7). A movable plate (31) is fixedly connected to the telescopic end of the second electric push rod (32). The movable block (30) and the movable plate (31) are connected by a connecting rope (33), and the connecting rope (33) passes through the fixed column (6) and the mounting sleeve (7).

8. The laser cutting equipment according to claim 7, characterized in that, The movable sleeve (16) is rotatably connected to a number of balls (34), and the balls (34) are in contact with the support ring (28).

9. The laser cutting equipment according to claim 5, characterized in that, The synchronization unit includes a connecting shaft (26) located below the mounting sleeve (7). The connecting shaft (26) is rotatably connected to two fixed shells (21). The outer fixed sleeve of the rotating sleeve (20) is provided with a first gear (25) located inside the fixed shell (21). The two ends of the connecting shaft (26) are respectively fixedly connected with a second gear (27) that meshes with the first gear (25).

10. The laser cutting equipment according to claim 1, characterized in that, The drive structure includes a lifting seat (35) and a support shell (36) respectively rotatably sleeved on the outside of the rotating shaft (3). The lifting seat (35) passes through the operating table (1). A second prism (38) is fixedly connected to the bottom of the support shell (36). A first sliding sleeve (39) is slidably sleeved on the outside of the second prism (38). The bottom end of the first sliding sleeve (39) is fixedly connected to the operating table (1). A worm gear (37) located in the support shell (36) is fixedly sleeved on the outside of the rotating shaft (3). A worm (47) meshing with the worm gear (37) is rotatably connected in the support shell (36). A third prism (40) is fixedly connected to the bottom of the worm (47). A second sliding sleeve (41) is slidably sleeved on the outside of the third prism (40). A second servo motor (42) is fixedly connected on the operating table (1). The output end of the second servo motor (42) is fixedly connected to the second sliding sleeve (41). A positioning component adapted to the lifting seat (35) is installed on the operating table (1).

11. The laser cutting equipment according to claim 10, characterized in that, The positioning component includes a stop plate (43) set on the operating table (1), the stop plate (43) and the lifting seat (35) are in contact, and a third electric push rod (44) is fixedly connected on the operating table (1), and the telescopic end of the third electric push rod (44) is fixedly connected to the stop plate (43).

12. The laser cutting equipment according to claim 10, characterized in that, The translation shaft (5) is fitted with a fixed sleeve (45), and the fixed sleeve (45) and the support shell (36) are fixedly connected. A guide groove (48) is provided on the translation shaft (5), and a guide strip (46) is slidably provided in the guide groove (48), and the guide strip (46) and the fixed sleeve (45) are fixedly connected.

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