A laser pipe cutting machine and cutting method suitable for steel structure industry

Abstract

The application provides a laser pipe cutting machine and cutting method suitable for steel structure industry, and belongs to the technical field of laser processing.The laser pipe cutting machine suitable for steel structure industry comprises a bed body assembly, a portal beam assembly is horizontally slidably connected above the bed body assembly, and a laser cutting assembly and a milling assembly are respectively horizontally slidably connected to the two sides of the portal beam assembly; a double-sided chuck assembly is arranged on the bed body assembly, and a rolling clamping mechanism and a fixed clamping mechanism are respectively arranged on the two sides of the double-sided chuck assembly.The laser pipe cutting machine provided by the application innovatively integrates laser cutting and milling on one pipe cutting machine, adopts a brand-new double-sided chuck form, can perform laser rotary cutting on I-beams and can perform milling treatment on the roots of the I-beams, thereby well solving the processing problem of I-beams in the steel structure industry; meanwhile, the laser pipe cutting machine can also meet all functions of conventional pipe cutting machines and realize one machine with multiple uses.

Description

Technical Field

[0001] This invention belongs to the field of laser processing technology, specifically relating to a laser tube cutting machine and cutting method suitable for the steel structure industry. Background Technology

[0002] With the sustained and rapid development of the social economy, the steel structure industry has grown rapidly. Especially in the construction field, steel structures have been widely used in the construction industry due to their inherent strength and seismic performance, as well as their advantages such as low carbon emissions, environmental friendliness, and short construction cycles.

[0003] However, certain processing techniques in steel structure fabrication remain unresolved, hindering the development of the entire steel structure industry. Specifically, as shown in the attached diagram of the instruction manual... Figure 1 As shown, the common connection method for connecting beams in steel structures is as follows: first, arcs are cut at the ends of the two corresponding hot-rolled I-beams using methods such as plasma cutting or handheld flame cutting; then, connecting plates are welded to the cut arcs to join the two hot-rolled I-beams together. Therefore, to ensure a strong and reliable connection between the two hot-rolled I-beams using this method, the web and flange connections of the two connected hot-rolled I-beams must be machined flat to ensure the connecting plate fits snugly and welds firmly to the corresponding hot-rolled I-beams. However, when using existing laser tube cutting machines to cut I-beams, the laser tube cutting machine cannot cut the root of the I-beam, and the cross-section of the inner groove root of the I-beam after processing (as shown in the attached diagram) is limited. Figure 2 The area indicated by the arrow above is mostly an uneven slope, so it is often necessary to transfer the I-beam to a manual workbench for manual grinding after laser cutting, or to another workbench for mechanical grinding.

[0004] Furthermore, during the manual polishing process, as shown in the attached diagram in the instruction manual... Figure 2 As shown, because it uses grinding discs for grinding, it is easy for the discs to break and injure workers, and it is also difficult to guarantee the final grinding quality. During the mechanical grinding process, because it needs to move the I-beam between different worktables, there is a problem of poor processing accuracy due to inaccurate positioning after multiple clamping. In addition, although there are some devices in the existing technology that have both laser processing and milling functions, most of the existing devices with laser processing and milling functions are machine tools used to process irregular aluminum alloy profiles in the door and window manufacturing industry. Moreover, these devices mainly use milling cutters for cutting and laser heads for auxiliary scribing or cutting of some thin-walled profiles, and are not suitable for processing I-beams in steel structures. Summary of the Invention

[0005] The technical problem solved by this invention is to provide a laser tube cutting machine and cutting method suitable for the steel structure industry, which can achieve high-efficiency laser cutting processing and solve the problem of uneven cross-section after laser cutting, so as to solve the processing problem of I-beams in the steel structure industry.

[0006] To address the aforementioned technical problems, this invention provides a laser pipe cutting machine suitable for the steel structure industry. The machine includes a bed assembly, a gantry beam assembly horizontally slidably connected above the bed assembly, and laser cutting and milling assemblies horizontally slidably connected to both sides of the gantry beam assembly, with the sliding directions of the laser cutting and milling assemblies perpendicular to the sliding direction of the gantry beam assembly. A double-sided chuck assembly is mounted on the bed assembly, with a rolling clamping mechanism and a fixed clamping mechanism respectively located on both sides. Because the laser pipe cutting machine provided by this invention simultaneously possesses both laser cutting and milling assemblies—innovatively combining laser cutting and milling into a single machine—and employs a novel double-sided chuck design, it can perform both laser rotary cutting of I-beams and milling of the I-beam root, effectively solving the processing challenges of I-beams in the steel structure industry. Furthermore, it can fulfill all the functions of a conventional pipe cutting machine, achieving multi-purpose functionality. Furthermore, the present invention can also effectively combine the movement of the gantry beam assembly along the length of the bed assembly, the movement of the workpiece along the length of the bed assembly, the movement of the laser cutting assembly and the milling assembly, and the rotational motion of the double-sided chuck assembly.

[0007] Furthermore, the double-sided chuck assembly includes a front chuck seat and a back chuck seat arranged opposite to each other. The front chuck seat and the back chuck seat are mounted on the bed assembly, and the front chuck seat is rotatably mounted with a front chuck, which contains a rolling clamping mechanism. The back chuck seat is rotatably mounted with a back chuck, which contains a fixed clamping mechanism. The double-sided chuck assembly also includes a front chuck rotation drive mechanism, which drives the back chuck and the front chuck through a front chuck rotation transmission mechanism. When performing rotary cutting operations using a laser cutting assembly, this invention first clamps the corresponding workpiece using the rolling clamping mechanism in the front chuck and releases the fixed clamping mechanism in the rear chuck. Then, the front chuck and rear chuck are rotated by the front chuck rotation drive mechanism, thereby rotating the workpiece at the corresponding angle. In addition, when performing milling operations using a milling assembly, this invention first clamps the corresponding workpiece simultaneously using the rolling clamping mechanism in the front chuck and the fixed clamping mechanism in the rear chuck, and then controls the milling assembly to perform the corresponding milling operation to prevent the workpiece from shaking.

[0008] Furthermore, the rolling clamping mechanism includes two pairs of clamping rollers, with the two clamping rollers in each pair arranged opposite to each other, and a synchronization mechanism is provided between the two clamping rollers in each pair. Each clamping roller is driven by a drive cylinder, thereby ensuring that the two clamping rollers in each pair can move synchronously through the aforementioned synchronization mechanism, so as to ensure that the clamped workpiece can be centered on the front chuck and that the cut parts meet the accuracy requirements.

[0009] Furthermore, the fixed clamping mechanism includes two pairs of anti-slip clamps, with the two anti-slip clamps in each pair arranged opposite each other, and a synchronization mechanism is provided between the two anti-slip clamps in each pair. Each anti-slip clamp is driven by a drive cylinder, thereby ensuring that the two anti-slip clamps in each pair can move synchronously through the aforementioned synchronization mechanism, so as to ensure that the clamped workpiece is centered on the back chuck and that the cut parts meet the required accuracy.

[0010] Furthermore, the bed assembly also includes a rear chuck assembly, which is horizontally slidably mounted on the bed assembly along its length. In this case, during the processing of I-beams or other pipes, the rear chuck assembly can push the corresponding I-beam or other pipe along the length of the bed assembly, thereby driving the I-beam or other pipe closer to or further away from the double-sided chuck assembly, thus achieving the purpose of feeding and unloading.

[0011] Furthermore, the rear chuck assembly includes a Y-axis slide plate, which is horizontally slidably mounted on the bed assembly along its length. The rear chuck, a rear chuck Y-axis linear drive mechanism, and a rear chuck rotary drive mechanism are mounted on the Y-axis slide plate. The rear chuck includes a rear chuck spindle, one end of which is connected to the rear chuck rotary drive mechanism via a rear chuck rotary transmission mechanism. The other end of the rear chuck spindle is fitted with a rear chuck drive cylinder via fasteners. The surface of the rear chuck drive cylinder is provided with four guide pillars and four movable cavities. Each movable cavity has a cylinder cover at its open end and a control pipeline at its closed end. A rear chuck drive piston rod is slidably mounted in each movable cavity. The ends of two opposing rear chuck drive piston rods pass through the cylinder cover and connect to the same push plate. Each push plate is slidably connected to the corresponding guide pillar via a guide sleeve. Each push plate is connected to two jaws via two linkage mechanisms. Based on this, compared to the existing rear chuck assembly which uses four prefabricated small cylinders directly installed, the rear chuck assembly of this invention directly machines four individual small cylinders on the rear chuck drive cylinder body for driving. Therefore, this invention can arrange the largest cylinder body within the limited space inside the rear chuck, and maximize the clamping force of the jaws on the rear chuck assembly. Furthermore, compared to the existing rear chuck assembly structure that uses the cooperation between the rear chuck cylinder wall and the push plate for guidance, the structure of this invention, which uses the cooperation between the push plate and the guide post for guidance, is easier to manufacture and reduces the machining difficulty of the rear chuck cylinder wall.

[0012] Furthermore, the rear chuck also includes a jaw retainer, and a fully enclosed protective cover is provided between the jaw retainer and the rear chuck spindle, which prevents dust and other contaminants from entering the interior of the rear chuck.

[0013] Furthermore, the laser cutting head in the laser cutting assembly and the milling cutter in the milling assembly both have vertical degrees of freedom and horizontal degrees of freedom perpendicular to the length direction of the bed assembly, to ensure that they can perform corresponding processing on I-beams or other pipes.

[0014] Furthermore, the bed assembly is also provided with at least one support and clamping assembly, which is provided with a centering clamping mechanism and is used to provide vertical support for the I-beam or other pipes being processed.

[0015] Furthermore, a protective sheet metal is provided on the outside of the bed frame assembly to protect the bed frame assembly and ensure the safety and comfort of the corresponding operations.

[0016] On the other hand, the present invention provides a cutting method using the above-mentioned laser tube cutting machine suitable for the steel structure industry, which includes the following steps:

[0017] Step 1, initial state: control the rear chuck assembly to be located at the tail end of the bed assembly, and control the corresponding support and clamping assembly to rise according to the length of the workpiece being processed;

[0018] Step two, loading: Place the workpiece to be processed on the raised support and clamping assembly, and control the centering clamping mechanism of the support and clamping assembly to clamp the workpiece, so that the axis of the workpiece is aligned with the center of the double-sided chuck assembly and the rear chuck assembly; then the rear chuck assembly moves forward and clamps the tail end of the workpiece, and then the rear chuck assembly drives the workpiece to move forward until the front end of the workpiece is directly below the laser cutting assembly; at this time, the milling assembly is not working and is located at the corresponding origin position, and the gantry beam assembly is located in the laser cutting area;

[0019] Step 3, laser cutting process: The rear chuck assembly moves the workpiece along the length of the bed assembly according to the workpiece cutting program. The front chuck in the double-sided chuck assembly clamps the workpiece through the rolling clamping mechanism. The laser cutting assembly moves to the corresponding position to perform laser cutting on the workpiece.

[0020] Step four, milling process: After the laser cutting process is completed, the laser cutting component returns to the corresponding origin position, and the gantry beam component retracts to prepare for the milling process; the fixed clamping mechanism in the back chuck of the double-sided chuck component clamps the workpiece to be processed, and the centering clamping mechanism in the support clamping component simultaneously clamps the workpiece to be processed. The gantry beam component and the milling component drive the milling cutter in the milling component to move accordingly according to the workpiece milling program and mill the arc cut in step three.

[0021] Step 5, the cutting process: After the milling process is completed, the fixed clamping mechanism in the back chuck of the double-sided chuck assembly releases the workpiece, and the centering clamping mechanism in the support clamping assembly simultaneously releases the workpiece. At this time, the rolling clamping mechanism in the front chuck always maintains the state of clamping the workpiece. The rear chuck assembly drives the workpiece to move forward along the length direction of the bed assembly, so that the workpiece re-enters the laser cutting process. Then, the double-sided chuck assembly is rotated, and the laser cutting assembly is executed according to the corresponding cutting program, so that the laser cutting assembly cuts the workpiece in the middle of the arc milled in step 4, and obtains a finished product.

[0022] Step six, repeat. After the cutting process is completed, control the rolling clamping mechanism in the front chuck of the double-sided chuck assembly to release the workpiece being processed, and the centering clamping mechanism in the support clamping assembly to release the workpiece being processed at the same time; then repeat steps three, four, and five until the next finished product is obtained.

[0023] As can be seen from the above technical solutions, the present invention has the following advantages:

[0024] 1. This invention not only provides an innovative laser tube cutting machine that integrates laser cutting and milling into one tube cutting machine, suitable for the steel structure industry, but also proposes a brand-new method for processing I-beams, thereby effectively solving the processing problem of I-beams in the steel structure industry and improving the corresponding processing efficiency and processing accuracy.

[0025] 2. The front chuck of the laser tube cutting machine for the steel structure industry provided by the present invention adopts a brand-new double-sided chuck form. The front chuck is clamped by rollers and participates in both the laser cutting process and the milling process. The back chuck is clamped by anti-slip plates and only participates in the milling process. In addition, the supporting clamping components have both automatic centering and clamping functions.

[0026] 3. The rear chuck assembly of the laser tube cutting machine for the steel structure industry provided by the present invention adopts an integrated four-cylinder structure, and has the advantages of large clamping force and good sealing effect.

[0027] 4. The support and clamping assembly provided by this invention for a laser tube cutting machine suitable for the steel structure industry can provide follow-up support during the cutting process and clamp the workpiece during the milling process, so as to improve the processing quality and equipment stability.

[0028] 5. The laser pipe cutting machine for the steel structure industry provided by this invention has the advantage of solving the problem of I-beam processing. However, it is not only used for processing I-beams. It can also be used as a conventional pipe cutting machine to perform laser cutting operations on other pipes that do not require milling processes during operation, thus achieving multiple uses in one machine. Attached Figure Description

[0029] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying 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.

[0030] Figure 1 This is a structural diagram of the connection between adjacent I-beams in an existing steel structure;

[0031] Figure 2 This is a schematic diagram of the structure when using a grinding wheel to grind the I-beam of the laser cutting mechanism;

[0032] Figure 3 This is a schematic diagram of the structure of a specific embodiment of the present invention, Example 1;

[0033] Figure 4 This is a schematic diagram of the structure of the gantry beam assembly in Embodiment 1 of the present invention;

[0034] Figure 5 This is a schematic diagram of the double-sided chuck assembly in Embodiment 1 of the present invention. Figure 1 ;

[0035] Figure 6 This is a schematic diagram of the double-sided chuck assembly in Embodiment 1 of the present invention. Figure 2 ;

[0036] Figure 7 This is a schematic diagram of the front chuck structure in Embodiment 1 of the present invention;

[0037] Figure 8 This is a schematic diagram of the structure of the back chuck in Embodiment 1 of the present invention;

[0038] Figure 9 This is a schematic diagram of the rear chuck assembly in Embodiment 1 of the present invention;

[0039] Figure 10 This is a cross-sectional view of the rear chuck assembly in Embodiment 1 of the present invention;

[0040] Figure 11 This is a schematic diagram of the rear chuck structure in Embodiment 1 of the present invention;

[0041] Figure 12 A schematic diagram of the structure of the I-beam after completing the laser cutting process in step three;

[0042] Figure 13 This is a schematic diagram of the structure of the I-beam after the milling process in step four.

[0043] In the diagram: 1. I-beam, 2. Connecting plate, 3. Grinding disc, 4. Rear chuck assembly, 5. Bed assembly, 6. Support and clamping assembly, 7. Milling assembly, 8. Laser cutting assembly, 9. Gantry beam assembly, 10. Double-sided chuck assembly, 11. Front chuck, 12. Clamping rollers, 13. Front chuck rotary transmission mechanism, 14. Rear chuck, 15. Anti-slip clamping plate, 16. Drive cylinder, 17. Synchronization mechanism, 18. Y-axis slide plate, 19. Rear chuck Y-axis linear drive 20. Rear chuck rotation drive mechanism; 21. Rear chuck rotation transmission mechanism; 22. Rear chuck support; 23. Fully enclosed protective cover; 24. Chuck fixing seat; 25. Chuck; 26. Rear chuck adjustment mechanism one; 27. Rear chuck adjustment mechanism two; 28. Push plate; 29. ​​Rear chuck drive piston rod; 30. Rear chuck drive cylinder; 31. Cylinder head; 32. Guide column; 33. Guide sleeve; 34. Linkage mechanism; 35. Rear chuck main shaft; 36. Exhaust and dust removal pipe. Detailed Implementation

[0044] 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.

[0045] Example 1

[0046] like Figure 3 As shown in the figure, this embodiment 1 provides a laser pipe cutting machine suitable for the steel structure industry, which includes a bed assembly 5. A protective sheet metal is provided on the outer side of the bed assembly 5. A gantry beam assembly 9 is horizontally slidably connected above the bed assembly 5 along the length direction of the bed assembly 5. A laser cutting assembly 8 and a milling assembly 7 are horizontally slidably connected on both sides of the gantry beam assembly 9, and the sliding direction of the laser cutting assembly 8 and the milling assembly 7 on the gantry beam assembly 9 is perpendicular to the sliding direction of the gantry beam assembly 9. The laser cutting head in the laser cutting assembly 8 and the milling cutter in the milling assembly 7 also have a vertical degree of freedom and a horizontal degree of freedom perpendicular to the length direction of the bed assembly 5, so as to ensure that they can both perform corresponding processing on I-beams or other pipes.

[0047] At the same time, such as Figure 3 As shown, at the position corresponding to the gantry beam assembly 9, a double-sided chuck assembly 10 is also fixedly installed above the bed assembly 5; on the side away from the double-sided chuck assembly 10, a rear chuck assembly 4 is also horizontally slidably connected above the bed assembly 5 along the length direction of the bed assembly 10. Between the double-sided chuck assembly 10 and the rear chuck assembly 4, at least one lifting support clamping assembly 6 is installed on the bed assembly 5, and a centering clamping mechanism is provided on the upper part of the support clamping assembly 6.

[0048] Among them, such as Figure 5 , Figure 6 As shown, the double-sided chuck assembly 10 includes a front chuck seat and a back chuck seat arranged opposite each other. Both the front and back chuck seats are mounted on the bed assembly 5. When the gantry beam assembly 9 is located above the double-sided chuck assembly 10, the position of the front chuck seat is opposite to the position of the laser cutting assembly 8, and the position of the back chuck seat is opposite to the position of the milling assembly 7. Specifically, a front chuck 11 is rotatably mounted on the front chuck seat, and a rolling clamping mechanism is installed within the front chuck 11. Figure 7As shown, the rolling clamping mechanism includes two pairs of clamping rollers 12. The two clamping rollers 12 in each pair are arranged opposite to each other, and a synchronization mechanism 17 is provided between the two clamping rollers 12 in each pair. Each clamping roller 12 is driven by a drive cylinder 16. Thus, the synchronization mechanism 17 ensures that the two clamping rollers 12 in each pair can move synchronously, so as to ensure that the clamped workpiece is centered on the front chuck 11 and that the cut parts meet the accuracy requirements.

[0049] The back chuck seat is rotatably mounted with a back chuck 14, and a fixing clamping mechanism is installed inside the back chuck 14. For example... Figure 8 As shown, the fixed clamping mechanism includes two pairs of anti-slip clamps 15. The two anti-slip clamps 15 in each pair are arranged opposite each other, and the surfaces of the two anti-slip clamps 15 in each pair are provided with anti-slip grooves. A synchronization mechanism 17 is provided between the two anti-slip clamps 15 in each pair. Each anti-slip clamp 15 is driven by a drive cylinder 16. Thus, the synchronization mechanism 17 ensures that the two anti-slip clamps 15 in each pair can move synchronously, so as to ensure that the clamped workpiece is centered on the back chuck 14 and that the cut parts meet the accuracy requirements.

[0050] In addition, the double-sided chuck assembly 10 also includes a front chuck rotation drive mechanism installed inside the bed assembly 5. The front chuck rotation drive mechanism is connected to the back chuck 14 and the front chuck 11 via a front chuck rotation transmission mechanism 13. Thus, when using the laser cutting assembly 8 for rotary cutting, in this embodiment 1, the corresponding workpiece can be clamped by the rolling clamping mechanism in the front chuck 11 and the fixed clamping mechanism in the back chuck 14 can be released. Then, the front chuck rotation drive mechanism drives the front chuck 11 and the back chuck 14 to rotate, thereby rotating the workpiece at the corresponding angle. In addition, when using the milling assembly 7 for milling, in this embodiment 1, the corresponding workpiece can be clamped by the rolling clamping mechanism in the front chuck 11 and the fixed clamping mechanism in the back chuck 14 simultaneously. Then, the milling assembly 7 is controlled to perform the corresponding milling operation to prevent the workpiece from shaking.

[0051] like Figure 9 , Figure 10 , Figure 11As shown, the rear chuck assembly 4 includes a Y-axis slide plate 18, which is horizontally slidably mounted on the bed assembly 5 along its length. The Y-axis slide plate 18 is equipped with a rear chuck, a rear chuck Y-axis linear drive mechanism 19, and a rear chuck rotary drive mechanism 20. The rear chuck Y-axis linear drive mechanism 19 drives the Y-axis slide plate 18 to move horizontally along the length of the bed assembly 5. The Y-axis slide plate 18 is also equipped with a rear chuck adjustment mechanism 27 for adjusting the distance between the rear chuck Y-axis linear drive mechanism 19 and the bed assembly 5. Specifically, the rear chuck Y-axis linear drive mechanism 19 is a combination of a motor and a gear and rack mechanism. The rear chuck adjustment mechanism 27 includes a gear meshing adjustment plate, on which a tightening screw and a tensioning screw are fixedly mounted. Thus, in this embodiment 1, the meshing clearance between the corresponding gears and racks can be adjusted through two pulls and two tightens, making the rear chuck assembly 4 run more smoothly and quietly, and extending the service life of the gears and racks.

[0052] The rear chuck includes a rear chuck spindle 35, which is mounted on the Y-axis slide plate 18 via a rear chuck support 22. A rear chuck adjustment mechanism 26 is provided on one side of the rear chuck support 22 to adjust the relative position between the rear chuck support 22 and the Y-axis slide plate 18. One end of the rear chuck spindle 35 is connected to the rear chuck rotation drive mechanism 20 via a rear chuck rotation transmission mechanism. The other end of the rear chuck spindle 35 is fitted with a rear chuck drive cylinder 30 via fasteners. The surface of the rear chuck drive cylinder 30 is provided with four guide posts 32 and four movable cavities. Each movable cavity has a cylinder cover 31 at its open end and a control pipeline at its closed end. A rear chuck drive piston rod 29 is slidably installed in each movable cavity. The ends of two oppositely arranged rear chuck drive piston rods 29 pass through the cylinder cover 31 and are connected to the same push plate 28. Each push plate 28 is slidably connected to the corresponding guide post 32 via a guide sleeve 33. Each push plate 28 is connected to two chuck jaws 25 via two linkage mechanisms 34. The chuck jaws 25 are slidably installed on the chuck jaw fixing seat 24. A fully enclosed protective cover 23 is provided between the chuck jaw fixing seat 24 and the rear chuck spindle 35 to prevent dust and other contaminants from entering the rear chuck.

[0053] The linkage mechanism 34 includes a push rod and an L-shaped rotating link. One end of the push rod is fixedly installed on the push plate 28 near the pawl 25, and the other end of the push rod has a movable hole through it along the moving direction of the pawl 25. The corner of the rotating link is hinged to the pawl fixing seat 24 near the rear pawl drive cylinder 30. One end of the rotating link is slidably connected to the movable hole provided on the corresponding push rod, and the other end of the rotating link passes through the pawl fixing seat 24 through the elongated hole and engages with the pawl movable block. The pawl movable block is slidably installed on the pawl fixing seat 24, and a pawl 25 is installed on one side of the pawl movable block. When the two opposing jaws 25 need to move closer to each other, in this embodiment 1, the rear jaw drive piston rod 29 can drive the push plate 28 to move closer to the jaw fixing seat 24. At this time, the push plate 28 will drive the push rod to move closer to the jaw fixing seat 24. The push rod will drive the rotating connecting rod to rotate in the corresponding direction around its hinge point with the jaw fixing seat 24, thereby driving the end of the rotating connecting rod that is hinged to the jaw movable block to rotate towards the center of the rear chuck. At the same time, the rotating connecting rod will also drive the jaw movable block and the corresponding jaw 25 to move towards the center of the rear chuck, thereby realizing the two jaws 25 moving closer to each other.

[0054] Furthermore, as a preferred embodiment, this embodiment 1 also includes an exhaust dust removal pipe 36 inside the rear chuck spindle 35, with its front air intake located at the center of the corresponding four jaws 25. This allows this embodiment 1 to perform dust removal during processing via the exhaust dust removal pipe 36, ensuring a clean processing environment. Additionally, the rear chuck assembly 4 is externally equipped with a rear clamping protective sheet metal. This sheet metal features a pressure regulating valve that adjusts the clamping pressure of the rear chuck assembly. The pressure gauge faces the operator for easy observation of pressure changes, and the manual knob is located directly above, facilitating manual pressure adjustment and preventing improper pressure that could cause the workpiece to be unable to be clamped or flattened.

[0055] Based on this, compared to the existing rear chuck assembly which uses four prefabricated small cylinders directly installed, the rear chuck assembly 4 in this embodiment 1 directly has four individual small cylinders machined on the rear chuck drive cylinder body 30 for driving. Therefore, this embodiment 1 can arrange the largest cylinder body within the limited space inside the rear chuck, and maximize the clamping force of the jaws 25 provided on the rear chuck assembly 4. In addition, compared to the existing rear chuck assembly which uses the cooperation between the rear chuck cylinder wall and the guide plate for guidance, the structure in this embodiment 1 which uses the cooperation between the push plate 28 and the guide post 32 for guidance is easier to manufacture, and it reduces the machining difficulty of the rear chuck cylinder wall.

[0056] Thus, the laser pipe cutting machine provided in Embodiment 1 innovatively combines laser cutting and milling into a single machine, employing a novel double-sided chuck design. This allows for both laser rotary cutting of I-beams and milling of their roots, effectively solving the processing challenges of I-beams in the steel structure industry. Furthermore, it fulfills all the functions of a conventional pipe cutting machine, achieving multi-purpose functionality. Moreover, Embodiment 1 effectively integrates the movement of the gantry beam assembly 9 along the length of the bed assembly, the movement of the workpiece along the length of the bed assembly, the individual movements of the laser cutting assembly 8 and the milling assembly 7, and the rotational motion of the double-sided chuck assembly 10.

[0057] Example 2

[0058] This embodiment 2 provides a cutting method using the laser tube cutting machine for the steel structure industry described in embodiment 1 above, which includes the following steps:

[0059] Step 1, initial state: control the rear chuck assembly 4 to be located at the tail end of the bed assembly 5, and control the corresponding support and clamping assembly 6 to rise according to the length of the workpiece being processed;

[0060] Step two, loading: Place the workpiece to be processed on the raised support clamping assembly 6, and control the centering clamping mechanism of the support clamping assembly 6 to clamp the workpiece, so that the axis of the workpiece is aligned with the center of the double-sided chuck assembly 10 and the rear chuck assembly 4; then the rear chuck assembly 4 moves forward and clamps the tail end of the workpiece, and then the rear chuck assembly 4 drives the workpiece to move forward until the front end of the workpiece is directly below the laser cutting assembly 8; at this time, the milling assembly 7 is not working and is located at the corresponding origin position, and the gantry beam assembly 9 is located in the laser cutting area;

[0061] Step 3, laser cutting process: The rear chuck assembly 4 moves the workpiece along the length of the bed assembly 5 according to the workpiece cutting program. The front chuck 11 in the double-sided chuck assembly 10 clamps the workpiece through a rolling clamping mechanism. The laser cutting assembly 8 moves to the corresponding position to perform laser cutting on the workpiece; that is, to process the workpiece as shown in the image. Figure 12 The semicircular arcs located on both sides of the I-beam are shown;

[0062] Step four, milling process: After the laser cutting process is completed, the laser cutting component 8 returns to its corresponding origin position, and the gantry beam component 9 retracts to prepare for the milling process; the fixed clamping mechanism in the back chuck 14 of the double-sided chuck component 10 clamps the workpiece, and the centering clamping mechanism in the support clamping component 6 simultaneously clamps the workpiece. The gantry beam component 9 and the milling component 7 drive the milling cutter in the milling component 7 to move accordingly according to the workpiece milling program and mill the arc cut in step three; that is, mill the connection between the I-beam flange and the web plate flat and form... Figure 13 The shape shown;

[0063] Step 5, the cutting process: After the milling process is completed, the fixed clamping mechanism in the back chuck 14 of the double-sided chuck assembly 10 is controlled to release the workpiece, and the centering clamping mechanism in the support clamping assembly 6 is simultaneously released from the workpiece; at this time, the rolling clamping mechanism in the front chuck 11 always maintains the state of clamping the workpiece, and the rear chuck assembly 4 drives the workpiece to move forward along the length direction of the bed assembly 5, so that the workpiece re-enters the laser cutting process; then the double-sided chuck assembly 10 is controlled to rotate, and the laser cutting assembly 8 is controlled to execute the corresponding cutting program, so that the laser cutting assembly 8 cuts the workpiece in the middle of the arc completed in step 4, and obtains a finished product;

[0064] Step six, repeat. After the cutting process is completed, control the rolling clamping mechanism in the front chuck 11 of the double-sided chuck assembly 10 to release the workpiece being processed, and the centering clamping mechanism in the support clamping assembly 6 to release the workpiece being processed at the same time; then repeat steps three, four, and five until the next finished product is obtained.

[0065] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0066] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A laser tube cutting machine suitable for the steel structure industry, comprising a bed assembly, wherein a gantry beam assembly is horizontally slidably connected above the bed assembly; characterized in that, A laser cutting assembly and a milling assembly are horizontally slidably connected to both sides of the gantry beam assembly, and the sliding direction of the laser cutting assembly and the milling assembly is perpendicular to the sliding direction of the gantry beam assembly; a double-sided chuck assembly is provided on the bed assembly, and a rolling clamping mechanism and a fixed clamping mechanism are provided on both sides of the double-sided chuck assembly. The double-sided chuck assembly includes a front chuck seat and a back chuck seat arranged opposite to each other. The front chuck seat and the back chuck seat are mounted on the bed assembly. The front chuck seat is rotatably mounted with a front chuck, and a rolling clamping mechanism is installed inside the front chuck. The back chuck seat is rotatably mounted with a back chuck, and a fixed clamping mechanism is installed inside the back chuck. The double-sided chuck assembly also includes a front chuck rotation drive mechanism, which is connected to the back chuck and the front chuck through a front chuck rotation transmission mechanism. The bed assembly also includes a rear chuck assembly, which is horizontally slidably mounted on the bed assembly along its length. The bed assembly is also provided with at least one support and clamping assembly, which is provided with a centering and clamping mechanism; The cutting method of the laser tube cutting machine includes the following steps: Step 1, initial state: control the rear chuck assembly to be located at the tail end of the bed assembly, and control the corresponding support and clamping assembly to rise according to the length of the workpiece being processed; Step two, loading: Place the workpiece to be processed on the raised support and clamping assembly, and control the centering clamping mechanism of the support and clamping assembly to clamp the workpiece, so that the axis of the workpiece is aligned with the center of the double-sided chuck assembly and the rear chuck assembly; then the rear chuck assembly moves forward and clamps the tail end of the workpiece, and then the rear chuck assembly drives the workpiece to move forward until the front end of the workpiece is directly below the laser cutting assembly; at this time, the milling assembly is not working and is located at the corresponding origin position, and the gantry beam assembly is located in the laser cutting area; Step 3, laser cutting process: The rear chuck assembly moves the workpiece along the length of the bed assembly according to the workpiece cutting program. The front chuck in the double-sided chuck assembly clamps the workpiece through the rolling clamping mechanism. The laser cutting assembly moves to the corresponding position to perform laser cutting on the workpiece. Step four, milling process: After the laser cutting process is completed, the laser cutting component returns to the corresponding origin position, and the gantry beam component retracts to prepare for the milling process; the fixed clamping mechanism in the back chuck of the double-sided chuck component clamps the workpiece to be processed, and the centering clamping mechanism in the support clamping component simultaneously clamps the workpiece to be processed. The gantry beam component and the milling component drive the milling cutter in the milling component to move accordingly according to the workpiece milling program and mill the arc cut in step three. Step 5, the cutting process: After the milling process is completed, the fixed clamping mechanism in the back chuck of the double-sided chuck assembly releases the workpiece, and the centering clamping mechanism in the support clamping assembly simultaneously releases the workpiece. At this time, the rolling clamping mechanism in the front chuck always maintains the state of clamping the workpiece. The rear chuck assembly drives the workpiece to move forward along the length direction of the bed assembly, so that the workpiece re-enters the laser cutting process. Then, the double-sided chuck assembly is rotated, and the laser cutting assembly is executed according to the corresponding cutting program, so that the laser cutting assembly cuts the workpiece in the middle of the arc milled in step 4, and obtains a finished product. Step six, repeat. After the cutting process is completed, control the rolling clamping mechanism in the front chuck of the double-sided chuck assembly to release the workpiece being processed, and the centering clamping mechanism in the support clamping assembly to release the workpiece being processed at the same time; then repeat steps three, four, and five until the next finished product is obtained.

2. The laser tube cutting machine for the steel structure industry according to claim 1, characterized in that, The rolling clamping mechanism includes two pairs of clamping rollers. The two clamping rollers in each pair are arranged opposite each other, and a synchronization mechanism is provided between the two clamping rollers in each pair. Each clamping roller is driven by a drive cylinder.

3. The laser tube cutting machine for the steel structure industry according to claim 1, characterized in that, The fixed clamping mechanism includes two pairs of anti-slip clamps. The two anti-slip clamps in each pair are arranged opposite each other, and a synchronization mechanism is provided between the two anti-slip clamps in each pair. Each anti-slip clamp is driven by a drive cylinder.

4. The laser tube cutting machine for the steel structure industry according to any one of claims 1-3, characterized in that, The rear chuck assembly includes a Y-axis slide plate, which is horizontally slidably mounted on the bed assembly along its length. The rear chuck, a rear chuck Y-axis linear drive mechanism, and a rear chuck rotary drive mechanism are mounted on the Y-axis slide plate. The rear chuck includes a rear chuck spindle, one end of which is connected to the rear chuck rotary drive mechanism via a rear chuck rotary transmission mechanism. The other end of the rear chuck spindle is fitted with a rear chuck drive cylinder via fasteners. The surface of the rear chuck drive cylinder has four guide posts and four movable cavities. Each movable cavity has a cylinder cover at its open end and a control pipeline at its closed end. A rear chuck drive piston rod is slidably mounted in each movable cavity. The ends of two opposing rear chuck drive piston rods pass through the cylinder cover and connect to the same push plate. Each push plate is slidably connected to the corresponding guide post via a guide sleeve. Each push plate is connected to two jaws via two linkage mechanisms.

5. The laser tube cutting machine for the steel structure industry according to claim 4, characterized in that, The rear chuck also includes a jaw retainer, and a fully enclosed protective cover is provided between the jaw retainer and the rear chuck spindle.

6. The laser tube cutting machine for the steel structure industry according to any one of claims 1-3, characterized in that, Both the laser cutting head in the laser cutting assembly and the milling cutter in the milling assembly have vertical degrees of freedom and horizontal degrees of freedom that are perpendicular to the length direction of the bed assembly.

7. A cutting method for a laser tube cutting machine suitable for the steel structure industry, characterized in that, The laser tube cutting machine for the steel structure industry includes a bed assembly, with a gantry beam assembly horizontally slidably connected above the bed assembly. A laser cutting assembly and a milling assembly are horizontally slidably connected to both sides of the gantry beam assembly, with the sliding directions of the laser cutting and milling assemblies perpendicular to the sliding direction of the gantry beam assembly. A double-sided chuck assembly is provided on the bed assembly, with a rolling clamping mechanism and a fixed clamping mechanism respectively provided on both sides of the double-sided chuck assembly. The double-sided chuck assembly includes a front chuck seat and a back chuck seat arranged opposite each other, and the front chuck seat and the back chuck seat are mounted on the bed. The assembly includes a front chuck mounted on a front chuck seat, with a rolling clamping mechanism installed inside the front chuck; a rear chuck mounted on a rear chuck seat, with a fixed clamping mechanism installed inside the rear chuck; the double-sided chuck assembly also includes a front chuck rotation drive mechanism, which drives the rear chuck and the front chuck through a front chuck rotation transmission mechanism; the bed assembly also includes a rear chuck assembly, which is horizontally slidably mounted on the bed assembly along its length; the bed assembly also includes at least one support clamping assembly, which is equipped with a centering clamping mechanism. The method includes the following steps: Step 1, initial state: control the rear chuck assembly to be located at the tail end of the bed assembly, and control the corresponding support and clamping assembly to rise according to the length of the workpiece being processed; Step two, loading: Place the workpiece to be processed on the raised support and clamping assembly, and control the centering clamping mechanism of the support and clamping assembly to clamp the workpiece, so that the axis of the workpiece is aligned with the center of the double-sided chuck assembly and the rear chuck assembly; then the rear chuck assembly moves forward and clamps the tail end of the workpiece, and then the rear chuck assembly drives the workpiece to move forward until the front end of the workpiece is directly below the laser cutting assembly; at this time, the milling assembly is not working and is located at the corresponding origin position, and the gantry beam assembly is located in the laser cutting area; Step 3, laser cutting process: The rear chuck assembly moves the workpiece along the length of the bed assembly according to the workpiece cutting program. The front chuck in the double-sided chuck assembly clamps the workpiece through the rolling clamping mechanism. The laser cutting assembly moves to the corresponding position to perform laser cutting on the workpiece. Step four, milling process: After the laser cutting process is completed, the laser cutting component returns to the corresponding origin position, and the gantry beam component retracts to prepare for the milling process; the fixed clamping mechanism in the back chuck of the double-sided chuck component clamps the workpiece to be processed, and the centering clamping mechanism in the support clamping component simultaneously clamps the workpiece to be processed. The gantry beam component and the milling component drive the milling cutter in the milling component to move accordingly according to the workpiece milling program and mill the arc cut in step three. Step 5, the cutting process: After the milling process is completed, the fixed clamping mechanism in the back chuck of the double-sided chuck assembly releases the workpiece, and the centering clamping mechanism in the support clamping assembly simultaneously releases the workpiece. At this time, the rolling clamping mechanism in the front chuck always maintains the state of clamping the workpiece. The rear chuck assembly drives the workpiece to move forward along the length direction of the bed assembly, so that the workpiece re-enters the laser cutting process. Then, the double-sided chuck assembly is rotated, and the laser cutting assembly is executed according to the corresponding cutting program, so that the laser cutting assembly cuts the workpiece in the middle of the arc milled in step 4, and obtains a finished product. Step six, repeat. After the cutting process is completed, control the rolling clamping mechanism in the front chuck of the double-sided chuck assembly to release the workpiece being processed, and the centering clamping mechanism in the support clamping assembly to release the workpiece being processed at the same time; then repeat steps three, four, and five until the next finished product is obtained.

8. The cutting method of the laser tube cutting machine according to claim 7, characterized in that, The rolling clamping mechanism includes two pairs of clamping rollers. The two clamping rollers in each pair are arranged opposite each other, and a synchronization mechanism is provided between the two clamping rollers in each pair. Each clamping roller is driven by a drive cylinder.

9. The cutting method of the laser tube cutting machine according to claim 7, characterized in that, The fixed clamping mechanism includes two pairs of anti-slip clamps. The two anti-slip clamps in each pair are arranged opposite each other, and a synchronization mechanism is provided between the two anti-slip clamps in each pair. Each anti-slip clamp is driven by a drive cylinder.

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