Laser cutting apparatus and laser processing apparatus

Abstract

The application belongs to the technical field of laser processing, and relates to a laser cutting device and a laser processing equipment. The laser cutting device provided by the application comprises a seat body and a rotary driving member. The seat body comprises a first mounting seat and a second mounting seat, the length direction of the first mounting seat is perpendicular to the length direction of the second mounting seat, the first mounting seat is used for being connected with a fiber joint, and the second mounting seat is connected with a cutting head. The rotary driving member is in transmission connection with one end of the first mounting seat away from the fiber joint or the second mounting seat, so as to drive the cutting head to make rotary motion around the axial direction of the first mounting seat, thereby adjusting the processing angle of the cutting head. The laser processing equipment provided by the application comprises a workbench for placing a workpiece to be processed and the above-mentioned laser cutting device arranged on the workbench, and the laser cutting device is used for processing the workpiece to be processed. The application can prevent the laser cutting device from excessively pulling the optical fiber when rotating, and reduce the damage rate of the optical fiber.

Description

Technical Field

[0001] This application belongs to the field of laser processing technology, and more specifically, relates to a laser cutting device and laser processing equipment. Background Technology

[0002] Laser cutting technology, with its advantages of high processing speed, high cutting precision, and small heat-affected zone, has been widely used in the cutting of sheet metal and non-metal materials. Existing laser cutting equipment typically includes a laser generator, optical fiber, laser cutting head, and multi-axis motion mechanism. The laser cutting head is connected to the laser generator via an optical fiber, guiding the laser beam to the workpiece surface to complete the cutting operation.

[0003] In practical applications, laser cutting heads often need to perform multi-degree-of-freedom movements in three-dimensional space to meet the cutting requirements of complex contours. To adjust the cutting angle, the laser cutting head is usually arranged vertically (i.e., along the direction of gravity) and driven to rotate around a horizontal axis. When the rotation angle of the laser cutting head is large, it will excessively stretch the optical fiber, causing damage to the fiber. Utility Model Content

[0004] This application provides a laser cutting device and a laser processing equipment, which can prevent excessive pulling of the optical fiber when the laser cutting device rotates, thereby reducing the damage rate of the optical fiber.

[0005] The technical solution adopted in this application embodiment is: to provide a laser cutting device, including:

[0006] The base includes a first mounting base and a second mounting base. The length direction of the first mounting base is perpendicular to the length direction of the second mounting base. The first mounting base is used to connect with an optical fiber connector, and the second mounting base is connected to a cutting head.

[0007] A rotary drive is connected to the end of the first mounting base away from the fiber optic connector or the second mounting base to drive the cutting head to rotate around the axis of the first mounting base, thereby adjusting the processing angle of the cutting head.

[0008] Optionally, the laser cutting device further includes a reflector assembly. The first mounting base is provided with a first mounting cavity for passing laser light, and the first mounting cavity is connected to the fiber optic connector. The second mounting base is provided with a second mounting cavity for passing laser light, and the first mounting cavity and the second mounting cavity are in communication. The reflector assembly is installed at one end of the first mounting cavity near the second mounting cavity to reflect the laser light in the first mounting cavity into the second mounting cavity.

[0009] Optionally, a first opening communicating with the first mounting cavity is provided on one side of the first mounting base, and the reflector assembly is detachably mounted at the first opening.

[0010] Optionally, the first mounting cavity is provided with a beam expander assembly and a first protective mirror assembly. A second opening communicating with the first mounting cavity is provided on one side of the first mounting base. The first protective mirror assembly is disposed between the optical fiber connector and the beam expander assembly. The first protective mirror assembly can be inserted into or removed from the first mounting cavity through the second opening.

[0011] Optionally, the laser cutting device further includes a focusing lens assembly, wherein a third opening communicating with the second mounting cavity is provided on one side of the second mounting base, and the focusing lens assembly can be inserted into or removed from the second mounting cavity through the third opening.

[0012] Optionally, the focusing lens assembly includes a focusing lens, a lens mount, a cover plate, and an adjustment assembly. The lens mount is used to mount the focusing lens, the cover plate is used to cover the third opening, the cover plate is connected to the lens mount through the adjustment assembly, and the adjustment assembly is used to adjust the coaxiality of the focusing lens.

[0013] Optionally, the adjustment assembly includes two adjusting members and two elastic members. The two elastic members are spaced apart on the cover plate and connected to both sides of the lens mount, respectively. The two adjusting members are threadedly connected to the cover plate, and one end of the two adjusting members abuts against the lens mount.

[0014] Optionally, the mirror base is provided with two abutting parts, which are respectively used to abut against one end of the two adjusting members.

[0015] Optionally, the laser cutting device further includes a second protective lens assembly for protecting the focusing lens assembly. A fourth opening communicating with the second mounting cavity is provided on one side of the second mounting base. The second protective lens assembly can be inserted into or removed from the second mounting cavity through the fourth opening.

[0016] Optionally, the laser cutting device further includes a third protective lens assembly for protecting the focusing lens assembly. A fifth opening communicating with the second mounting cavity is provided on one side of the second mounting base. The third protective lens assembly can be inserted into or removed from the second mounting cavity through the fifth opening.

[0017] This application also provides a laser processing device, including a worktable for placing a workpiece to be processed and a laser cutting device as described above disposed on the worktable, the laser cutting device being used to process the workpiece.

[0018] The beneficial effects of the laser cutting device and laser processing equipment provided in this application embodiment are as follows: The laser cutting device in this application embodiment arranges the axis of the first mounting base perpendicular to the axis of the second mounting base, forming a spatial orthogonal layout between the fiber optic connector and the cutting head. When the rotary drive drives the second mounting base (i.e., the cutting head) to rotate, the optical fiber only needs to swing slightly around the axis of the first mounting base, with less twisting and radial pulling, thereby effectively avoiding problems such as fiber sheath wear and fiber core breakage caused by repeated bending and twisting, and significantly extending the service life of the optical fiber.

[0019] Because the stress state of the optical fiber is fundamentally improved, the laser power transmission is more stable, avoiding the deterioration of the spot quality caused by the micro-bending or damage of the optical fiber; at the same time, the direct transmission of the rotary drive component reduces intermediate links, improves the response speed and positioning accuracy of the cutting head angle adjustment, and thus improves the processing quality and consistency.

[0020] The laser processing equipment of this application includes the laser cutting equipment in any of the above embodiments, and therefore has the beneficial effects brought by the laser cutting equipment in any of the above embodiments, which will not be repeated here. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the laser cutting device provided in the embodiments of this application;

[0023] Figure 2 A top view of the laser cutting apparatus provided in the embodiments of this application;

[0024] Figure 3 For along Figure 2 Cross-sectional view of line AA in the middle;

[0025] Figure 4 This is a three-dimensional structural diagram of the first mounting base used in the embodiments of this application;

[0026] Figure 5 This is a three-dimensional structural diagram of the second mounting base used in the embodiments of this application;

[0027] Figure 6 This is a three-dimensional structural diagram of the focusing lens assembly used in the embodiments of this application.

[0028] The following are the labeling elements in the figure:

[0029] 1. Base; 11. First mounting base; 111. First mounting cavity; 112. First opening; 113. Second opening; 12. Second mounting base; 121. Second mounting cavity; 122. Third opening; 123. Fourth opening; 13. Fiber optic connector; 14. Cutting head;

[0030] 2. Rotary drive component;

[0031] 3. Reflector assembly;

[0032] 4. Beam expander assembly;

[0033] 5. First protective mirror assembly;

[0034] 6. Focusing lens assembly; 61. Focusing lens; 62. Lens mount; 621. Abutment part; 63. Cover plate; 64. Adjustment assembly; 641. Adjusting element; 642. Elastic element;

[0035] 7. Second protective mirror assembly;

[0036] 8. Third protective mirror assembly. Detailed Implementation

[0037] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0038] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0039] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0041] Please see Figure 1 and Figure 2 The laser cutting apparatus provided in the embodiments of this application will now be described. The laser cutting apparatus provided in the embodiments of this application includes a base 1 and a rotary drive component 2.

[0042] The base 1 includes a first mounting base 11 and a second mounting base 12. The length direction of the first mounting base 11 is perpendicular to the length direction of the second mounting base 12. The first mounting base 11 is used to connect to the fiber optic connector 13, and the second mounting base 12 is connected to a cutting head 14.

[0043] The rotary drive 2 is connected to the end of the first mounting base 11 away from the fiber optic connector 13 or the second mounting base 12 to drive the cutting head 14 to rotate around the axis of the first mounting base 11, thereby adjusting the processing angle of the cutting head 14.

[0044] The seat 1 in the embodiments of this application is made of metal or composite material.

[0045] The first mounting base 11 extends along the X-axis direction (i.e., the horizontal direction), and its end near the fiber optic connector 13 may be provided with a standard QBH, LOE or custom interface for forming a detachable rigid or semi-rigid connection with the fiber optic connector 13; its other end is directly or indirectly connected to the rotary drive 2.

[0046] The second mounting base 12 extends along the Y-axis (i.e., the vertical direction), and a cutting head 14 is installed at its end; the axis of the first mounting base 11 and the axis of the second mounting base 12 are orthogonal in space, forming a 90° angle.

[0047] In this embodiment, the rotary drive 2 can be a servo motor, whose output shaft is connected to the end of the first mounting base 11 away from the fiber optic connector 13 via a keyway, expansion sleeve, or harmonic reducer. In another embodiment, the rotary drive 2 can also be directly connected to the second mounting base 12 to drive the cutting head 14 to rotate around a horizontal axis. The servo motor is controlled by a CNC control system and can achieve reciprocating rotation.

[0048] Fiber optic connector 13 can be connected to a remote laser generator (not shown) via a standard armored fiber optic cable, with the fiber length having only the necessary redundancy and oscillating with a small amplitude throughout the rotation.

[0049] The laser cutting apparatus of this application arranges the axis of the first mounting base 11 perpendicular to the axis of the second mounting base 12, forming a spatial orthogonal layout between the fiber optic connector 13 and the cutting head 14. When the rotary drive 2 drives the second mounting base 12 (i.e., the cutting head 14) to rotate, the optical fiber only needs to swing slightly around the axis of the first mounting base 11 due to the shortened rotation radius of the cutting head 14. The twisting and radial pulling are reduced, thereby effectively avoiding problems such as fiber sheath wear and fiber core breakage caused by repeated bending and twisting, and significantly extending the service life of the optical fiber.

[0050] Because the stress state of the optical fiber is fundamentally improved, the laser power transmission is more stable, avoiding the deterioration of the spot quality caused by the micro-bending or damage of the optical fiber; at the same time, the direct transmission of the rotary drive component 2 reduces intermediate links, improves the response speed and positioning accuracy of the angle adjustment of the cutting head 14, and thus improves the processing quality and consistency.

[0051] Please see Figure 3 The laser cutting device also includes a reflector assembly 3. The first mounting base 11 is provided with a first mounting cavity 111 for passing laser light. The first mounting cavity 111 is connected to the fiber optic connector 13. The second mounting base 12 is provided with a second mounting cavity 121 for passing laser light. The first mounting cavity 111 and the second mounting cavity 121 are in communication. The reflector assembly 3 is installed at one end of the first mounting cavity 111 near the second mounting cavity 121 to reflect the laser light in the first mounting cavity 111 into the second mounting cavity 121.

[0052] The first mounting cavity 111 extends from the end face of the fiber optic connector 13 to the incident surface of the reflector, and is cylindrical or square.

[0053] The second mounting cavity 121 extends from the exit surface of the reflector to the cutting head 14, and is cylindrical or square, and is perpendicular to the first mounting cavity 111.

[0054] A right-angle optical path is formed at the intersection of the two cavities, and the reflector assembly 3 is located at the center of the intersection to ensure that the laser beam enters the cutting head 14 after being bent at 90°.

[0055] The laser beam enters the first mounting cavity 111 horizontally from the fiber optic connector 13, is reflected 90° by the reflector assembly 3, and then enters the second mounting cavity 121 vertically downwards. Finally, it is focused by the cutting head 14 and output to the workpiece. Since the reflector assembly 3 is fixed to the first mounting base 11 and rotates synchronously with the rotary drive 2, the laser beam maintains a fixed bending angle throughout the entire rotation process, without generating additional torsion or displacement.

[0056] Please see Figure 4 The first mounting base 11 has a first opening 112 on one side that communicates with the first mounting cavity 111, and the reflector assembly 3 is detachably mounted at the first opening 112.

[0057] The first opening 112 is formed on the side wall of the first mounting base 11 and communicates with the first mounting cavity 111. Its shape is rectangular or circular, and the opening area is sufficient to allow the reflector assembly 3 to be pushed in or removed horizontally as a whole.

[0058] The inner side of the first opening 112 may be machined with a stepped stop to limit the insertion depth of the reflector assembly 3 and ensure the 45° angular reference between the reflector assembly 3 and the axis of the first mounting base 11.

[0059] The outer edge of the stop may be provided with a rectangular sealing groove for embedding a fluororubber O-ring to achieve dust and water resistance.

[0060] The reflector assembly 3 can be fixed to the first opening 112 by magnetic attraction or screw thread for easy disassembly and replacement.

[0061] The first mounting cavity 111 is provided with a beam expander assembly 4 and a first protective mirror assembly 5. A second opening 113 communicating with the first mounting cavity 111 is provided on one side of the first mounting base 11. The first protective mirror assembly 5 is disposed between the fiber optic connector 13 and the beam expander assembly 4. The first protective mirror assembly 5 can be inserted into or removed from the first mounting cavity 111 through the second opening 113.

[0062] The first protective lens assembly 5 prevents dust from entering the first mounting cavity 111 and contaminating the beam expander assembly 4 during the replacement and disassembly of the fiber optic connector 13. The first protective lens assembly 5 can be inserted into or removed from the second mounting cavity 121 through the second opening 113, thus facilitating the replacement and disassembly of the first protective lens assembly 5.

[0063] A focusing assembly can also be installed inside the first mounting cavity 111. The focusing assembly is connected to the beam expander assembly 4 via a transmission connection, so as to drive the beam expander assembly 4 to move along the length direction of the first mounting cavity 111, thereby adjusting the position of the focal point to meet the laser cutting requirements of materials with different thicknesses. The focusing assembly can be a linear motor or a servo motor.

[0064] Please see Figure 5 and Figure 6 The laser cutting device also includes a focusing lens assembly 6. A third opening 122 communicating with the second mounting cavity 121 is provided on one side of the second mounting base 12. The focusing lens assembly 6 can be inserted into or removed from the second mounting cavity 121 through the third opening 122.

[0065] By opening a third opening 122 on the side wall of the second mounting base 12 and designing the focusing lens assembly 6 as a modular structure, this embodiment achieves rapid replacement of the focusing assembly while maintaining optical coaxiality and sealing reliability, significantly shortening maintenance downtime. It is suitable for high-power, high-cycle laser cutting equipment and significantly improves production efficiency and equipment availability.

[0066] The focusing lens assembly 6 includes a focusing lens 61, a lens mount 62, a cover plate 63, and an adjustment assembly 64. The lens mount 62 is used to mount the focusing lens 61, and the cover plate 63 is used to cover the third opening 122. The cover plate 63 is connected to the lens mount 62 through the adjustment assembly 64, which is used to adjust the coaxiality of the focusing lens 61.

[0067] The lens mount 62 can be made of a rectangular aluminum alloy block, and its external dimensions match the space inside the third opening 122. A limiting hole for mounting the focusing lens 61 is provided in its center.

[0068] The cover plate 63 can be made of stainless steel plate, and its outer contour is consistent with the third opening 122; a folding handle can be provided on its outer side for easy insertion and removal.

[0069] The lens mount 62 can form a "three-point universal" support with the cover plate 63 through three sets of ball head screws. Each point can move independently, allowing the lens mount 62 to translate relative to the cover plate 63 in the plane. At the same time, it can perform pitch and yaw compensation within a very small angle range, thereby precisely adjusting the optical axis of the focusing lens 61 to be coaxial with the axis of the cutting head 14.

[0070] Preferably, the adjustment assembly 64 includes two adjusting members 641 and two elastic members 642. The two elastic members 642 are spaced apart on the cover plate 63 and are respectively connected to both sides of the mirror base 62. The two adjusting members 641 are threadedly connected to the cover plate 63, and one end of the two adjusting members 641 abuts against the mirror base 62.

[0071] The adjusting element 641 can be a bolt or screw, and two adjusting elements 641 can make the mirror base 62 rotate on the horizontal plane.

[0072] The elastic element 642 can be a tension spring or an elastic band, used to always press the mirror mount 62 against the two adjusting elements 641, eliminate thread clearance, reduce backlash, and provide restoring force.

[0073] The mirror base 62 is provided with two abutting parts 621, which are used to abut against one end of the two adjusting members 641 respectively.

[0074] The contact part 621 may be made of silicone material to prevent the adjusting part 641 from wearing the mirror mount 62.

[0075] The laser cutting device also includes a second protective lens assembly 7 for protecting the focusing lens assembly 6. A fourth opening 123 communicating with the second mounting cavity 121 is provided on one side of the second mounting base 12. The second protective lens assembly 7 can be inserted into or removed from the second mounting cavity 121 through the fourth opening 123.

[0076] By opening a fourth opening 123 on the side wall of the second mounting base 12 and designing the second protective mirror assembly 7 as a modular structure, this embodiment achieves rapid replacement of the second protective mirror assembly 7 while maintaining optical coaxiality and sealing reliability, significantly shortening maintenance downtime. It is suitable for high-power, high-cycle laser cutting equipment and significantly improves production efficiency and equipment availability.

[0077] The laser cutting device also includes a third protective mirror assembly 8 for protecting the focusing mirror assembly 6. A fifth opening (not shown in the figure) communicating with the second mounting cavity 121 is provided on one side of the second mounting base 12. The third protective mirror assembly 8 can be inserted into or removed from the second mounting cavity 121 through the fifth opening.

[0078] By opening a fifth opening in the side wall of the second mounting base 12 and designing the third protective mirror assembly 8 as a modular structure, this embodiment achieves rapid replacement of the third protective mirror assembly 8 while maintaining optical coaxiality and sealing reliability, significantly shortening maintenance downtime. It is suitable for high-power, high-cycle laser cutting equipment and significantly improves production efficiency and equipment availability.

[0079] During laser cutting, dust will adhere to the third protective lens assembly 8. When the third protective lens assembly 8 is replaced, the second protective lens assembly 7 can also protect the focusing lens assembly 6, preventing the focusing lens 61 from being directly exposed to the environment, reducing the possibility of contamination of the focusing lens 61, extending the service life of the focusing lens 61 and saving costs.

[0080] In addition, the fifth opening can also be locked by a cover plate.

[0081] This application also provides a laser processing device, including a worktable for placing a workpiece to be processed and a laser cutting device as described in any of the above embodiments disposed on the worktable. The laser cutting device is used to process the workpiece.

[0082] The laser processing equipment of this application includes the laser cutting equipment in any of the above embodiments, and therefore has the beneficial effects brought by the laser cutting equipment in any of the above embodiments, which will not be repeated here.

[0083] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A laser cutting device, characterized in that, include: The base includes a first mounting base and a second mounting base. The length direction of the first mounting base is perpendicular to the length direction of the second mounting base. The first mounting base is used to connect with an optical fiber connector, and the second mounting base is connected to a cutting head. A rotary drive is connected to the end of the first mounting base away from the fiber optic connector or the second mounting base to drive the cutting head to rotate around the axis of the first mounting base, thereby adjusting the processing angle of the cutting head.

2. The laser cutting apparatus according to claim 1, characterized in that, It also includes a reflector assembly. The first mounting base is provided with a first mounting cavity for passing laser light, and the first mounting cavity is connected to the fiber optic connector. The second mounting base is provided with a second mounting cavity for passing laser light, and the first mounting cavity and the second mounting cavity are in communication. The reflector assembly is installed at the end of the first mounting cavity near the second mounting cavity to reflect the laser light in the first mounting cavity into the second mounting cavity.

3. The laser cutting apparatus according to claim 2, characterized in that, The first mounting base has a first opening on one side that communicates with the first mounting cavity, and the reflector assembly is detachably mounted at the first opening.

4. The laser cutting apparatus according to claim 2, characterized in that, The first mounting cavity is provided with a beam expander assembly and a first protective mirror assembly. A second opening communicating with the first mounting cavity is provided on one side of the first mounting base. The first protective mirror assembly is disposed between the optical fiber connector and the beam expander assembly. The first protective mirror assembly can be inserted into or removed from the first mounting cavity through the second opening.

5. The laser cutting apparatus according to claim 2, characterized in that, It also includes a focusing lens assembly, wherein a third opening communicating with the second mounting cavity is provided on one side of the second mounting base, and the focusing lens assembly can be inserted into or removed from the second mounting cavity through the third opening.

6. The laser cutting apparatus according to claim 5, characterized in that, The focusing lens assembly includes a focusing lens, a lens mount, a cover plate, and an adjustment assembly. The lens mount is used to mount the focusing lens, the cover plate is used to cover the third opening, and the cover plate is connected to the lens mount through the adjustment assembly. The adjustment assembly is used to adjust the coaxiality of the focusing lens.

7. The laser cutting apparatus according to claim 6, characterized in that, The adjustment assembly includes two adjusting members and two elastic members. The two elastic members are spaced apart on the cover plate and connected to both sides of the lens mount, respectively. The two adjusting members are threadedly connected to the cover plate, and one end of the two adjusting members abuts against the lens mount.

8. The laser cutting apparatus according to claim 7, characterized in that, The mirror base is provided with two abutting parts, which are respectively used to abut against one end of the two adjusting members.

9. The laser cutting apparatus according to claim 5, characterized in that, It also includes a second protective lens assembly for protecting the focusing lens assembly. A fourth opening communicating with the second mounting cavity is provided on one side of the second mounting base. The second protective lens assembly can be inserted into or removed from the second mounting cavity through the fourth opening.

10. The laser cutting apparatus according to claim 9, characterized in that, It also includes a third protective lens assembly for protecting the focusing lens assembly. A fifth opening communicating with the second mounting cavity is provided on one side of the second mounting base. The third protective lens assembly can be inserted into or removed from the second mounting cavity through the fifth opening.

11. A laser processing device, characterized in that, The invention includes a worktable for placing a workpiece to be processed and a laser cutting apparatus as described in any one of claims 1-10 disposed on the worktable, the laser cutting apparatus being used to process the workpiece.

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