Laser cutting head device with adaptive focal length adjustment
The laser cutting head device with adaptive focal length adjustment uses a laser rangefinder and an electric push rod to adjust the height of the focusing lens, which solves the problem of poor accuracy and quality in cutting workpieces of different materials and thicknesses by traditional laser cutting head devices, and realizes real-time focal length adjustment and precise cutting during the cutting process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HARBIN AIRLINES TECHNOLOGY DEVELOPMENT (JIANGSU) CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-06-02
AI Technical Summary
Traditional laser cutting head devices, due to their fixed focal length design, are difficult to adapt to the cutting needs of workpieces with different materials and thicknesses, resulting in poor cutting accuracy and quality.
The laser cutting head device with adaptive focal length adjustment measures the distance to the workpiece surface in real time and calculates the optimal focal length using a laser rangefinder. It also uses an electric push rod and adjustment components to achieve precise height adjustment of the focusing lens.
It enables real-time adaptive adjustment of the focal length during laser cutting, improving cutting quality and precision, and avoiding defects such as incomplete cutting and slag.
Smart Images
Figure CN224309815U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of laser cutting device technology, specifically a laser cutting head device with adaptive focal length adjustment. Background Technology
[0002] In the field of laser cutting technology, the laser cutting head is a core component, and its performance directly affects the cutting quality and efficiency. Traditional laser cutting head devices typically employ a fixed focal length design. However, in practical applications, due to differences in the material, thickness, and surface flatness of the workpieces being cut, a fixed focal length is insufficient to meet diverse cutting needs.
[0003] The optimal cutting focal length varies when cutting workpieces of different materials and thicknesses. For example, cutting thinner metal sheets requires a shorter focal length to achieve higher energy density and enable fast, precise cutting; while cutting thicker sheets requires a longer focal length to ensure the laser beam penetrates the entire thickness of the sheet, avoiding incomplete cutting or slag formation. Furthermore, workpiece surfaces are often uneven. A fixed-focal-length laser cutting head cannot adjust the focal length in real time according to the actual height of the workpiece surface, causing changes in the distance between the laser beam and the workpiece surface. This affects cutting accuracy and quality, potentially resulting in uneven cut edges, slag buildup, and other defects. Therefore, a laser cutting head device with adaptive focal length adjustment is proposed to address these issues. Utility Model Content
[0004] To address the shortcomings of existing technologies, this invention provides a laser cutting head device with adaptive focal length adjustment, which has advantages such as adaptive focal length adjustment and improved cutting quality, thus solving the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A laser cutting head device with adaptive focus adjustment includes a worktable, a bracket fixedly connected to the top of the worktable, and a top frame fixedly connected to the top of the bracket. A mounting shell is fixedly connected to the inner top wall of the bracket, and a laser cutting head is fixedly connected to the inner top wall of the mounting shell. An adjustment component for adjusting the focus is provided on the inner top wall of the top frame.
[0007] The adjustment assembly includes an electric push rod fixedly connected to the inner top wall of the top frame. One end of the movable rod of the electric push rod is fixedly connected to a connecting plate. Two connecting rods are fixedly connected to the bottom of the connecting plate. The bottom ends of the two connecting rods are fixedly connected to mounting blocks. A lens mount is provided between the opposite sides of the two mounting blocks. A focusing lens is fixedly connected to the inner side of the lens mount.
[0008] Furthermore, a laser rangefinder is fixedly connected to the back of the mounting housing, and the two connecting rods are respectively arranged on the left side and the right side of the bottom of the connecting plate.
[0009] Furthermore, mounting holes are provided inside the left side of the mounting block on the left and the right side of the mounting block on the right. A threaded sleeve is fixedly connected to the inside of the mounting hole, and a threaded shaft is threadedly connected to the inside of the threaded sleeve. A fixing plate is rotatably connected to the opposite end of the threaded shaft on both the left and right sides, and a locking block is fixedly connected to the opposite side of the fixing plate on both the left and right sides.
[0010] Furthermore, both the right side inside the left mounting block and the left side inside the right mounting block have openings adapted to the locking block.
[0011] Furthermore, the left and right side walls of the mirror mount are provided with locking slots that are compatible with the locking block.
[0012] Furthermore, the left and right sides inside the mounting shell are provided with upper and lower sliding openings that are adapted to the mounting block, and the mounting block is slidably connected to the inner side of the corresponding upper and lower sliding openings.
[0013] Furthermore, guide holes are provided on both the upper and lower sides of the fixed plate, and guide shafts are slidably connected to the inner side of the guide holes.
[0014] Furthermore, the left end of the guide shaft is fixedly connected to the inner left side wall of the mounting block, and the right end of the guide shaft is fixedly connected to the inner right side wall of the mounting block.
[0015] Compared with the prior art, this utility model provides a laser cutting head device with adaptive focus adjustment, which has the following beneficial effects:
[0016] This laser cutting head device with adaptive focal length adjustment can measure the distance between the focusing lens and the workpiece surface in real time during the laser cutting process by setting up a laser rangefinder and adjustment components. It can also automatically calculate the optimal focal length according to the preset laser cutting process parameters and precisely adjust the height of the focusing lens through an electric push rod to achieve real-time adaptive adjustment of the focal length. Attached Figure Description
[0017] Figure 1 This is a cross-sectional view of the structure of this utility model;
[0018] Figure 2 This utility model Figure 1 A magnified structural diagram of structure A is shown below;
[0019] Figure 3 This is a rear view of the structure of this utility model;
[0020] Figure 4 This is a perspective view of the workbench, support, and top frame in the structure of this utility model.
[0021] In the diagram: 1. Workbench; 2. Support; 3. Top frame; 4. Mounting housing; 5. Laser cutting head; 6. Electric push rod; 7. Connecting plate; 8. Connecting rod; 9. Mounting block; 10. Lens mount; 11. Focusing lens; 12. Laser rangefinder; 13. Threaded sleeve; 14. Threaded shaft; 15. Fixing plate; 16. Locking block; 17. Guide shaft. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] Please see Figures 1 to 4 The laser cutting head device with adaptive focal length adjustment in this embodiment includes a worktable 1, a bracket 2 fixedly connected to the top of the worktable 1, and a top frame 3 fixedly connected to the top of the bracket 2. A mounting shell 4 is fixedly connected to the inner top wall of the bracket 2, and a laser cutting head 5 is fixedly connected to the inner top wall of the mounting shell 4. An adjustment component for adjusting the focal length is provided on the inner top wall of the top frame 3.
[0024] Please see Figure 1 In this embodiment, the adjustment assembly includes an electric push rod 6 fixedly connected to the inner top wall of the top frame 3. One end of the movable rod of the electric push rod 6 is fixedly connected to a connecting plate 7. Two connecting rods 8 are fixedly connected to the bottom of the connecting plate 7. Mounting blocks 9 are fixedly connected to the bottom ends of the two connecting rods 8. A lens mount 10 is provided between the opposite sides of the two mounting blocks 9. A focusing lens 11 is fixedly connected to the inner side of the lens mount 10.
[0025] Specifically, a laser rangefinder 12 is fixedly connected to the back of the mounting shell 4, and two connecting rods 8 are respectively arranged on the left and right sides of the bottom of the connecting plate 7.
[0026] It should be noted that the laser rangefinder 12 can measure the distance from the focusing lens 11 to the workpiece surface in real time during the laser cutting process. The laser rangefinder 12 emits a laser beam and receives the reflected beam, and uses principles such as time difference or phase difference to accurately calculate the distance value, providing accurate data support for subsequent focus adjustment.
[0027] Specifically, mounting holes are provided inside the left side of the left mounting block 9 and the right side of the right mounting block 9. A threaded sleeve 13 is fixedly connected to the inside of the mounting hole. A threaded shaft 14 is threadedly connected to the inside of the threaded sleeve 13. A fixing plate 15 is rotatably connected to the opposite end of the threaded shaft 14 on both the left and right sides. A locking block 16 is fixedly connected to the opposite side of the fixing plate 15 on both the left and right sides.
[0028] It should be noted that this structure allows the locking block 16 to move precisely back and forth as the threaded shaft 14 rotates, enabling locking or unlocking of the lens mount 10, and facilitating the installation, disassembly and maintenance of the focusing lens 11.
[0029] Specifically, the right side inside the left mounting block 9 and the left side inside the right mounting block 9 are both provided with openings that are compatible with the locking block 16.
[0030] It should be noted that the purpose of the port is to provide a channel for the movement of the locking block 16.
[0031] Specifically, the left and right side walls of the mirror base 10 are provided with locking slots that are compatible with the locking block 16.
[0032] It should be noted that when the locking block 16 is inserted into the locking slot, the lens mount 10 is firmly fixed between the two mounting blocks 9, ensuring the stability of the focusing lens 11 during the laser cutting process.
[0033] Specifically, the left and right sides inside the mounting shell 4 are provided with upper and lower sliding openings that are adapted to the mounting block 9, and the mounting block 9 is slidably connected to the inner side of the corresponding upper and lower sliding openings.
[0034] It should be noted that the upper and lower sliding grooves provide a track for the vertical movement of the mounting block 9, enabling the mounting block 9 to move smoothly along the sliding grooves and ensuring that the focusing lens 11 will not shift or wobble during the vertical adjustment of the focus.
[0035] Specifically, guide holes are provided on both the upper and lower sides of the inside of the fixing plate 15, and a guide shaft 17 is slidably connected to the inside of the guide holes. The left end of the guide shaft 17 is fixedly connected to the inner left side wall of the mounting block 9, and the right end of the guide shaft 17 is fixedly connected to the inner right side wall of the mounting block 9.
[0036] It should be noted that the cooperation between the guide hole and the guide shaft 17 can guide the movement of the fixed plate 15, so that the fixed plate 15 can only move back and forth along the direction of the guide shaft 17 under the drive of the threaded shaft 14, without deflection or shaking.
[0037] The working principle of the above embodiments is as follows:
[0038] In the initial state, the focusing lens 11 is fixedly connected to the lens mount 10, and the lens mount 10 is locked between the two mounting blocks 9 by the locking block 16. At this time, the laser rangefinder 12 on the back of the mounting shell 4 starts to work, emits a laser beam to the surface of the workpiece, and receives the reflected beam. It calculates the initial distance data between the focusing lens 11 and the surface of the workpiece through internal calculation. According to the preset laser cutting process parameters, such as cutting material and cutting thickness, the control system calculates the optimal focal length required under the current working condition. It compares the initial distance data measured by the laser rangefinder 12 with the calculated optimal focal length, obtains the distance value that needs to be adjusted, and generates the corresponding adjustment command.
[0039] The control system sends adjustment commands to the electric push rod 6. The electric push rod 6 starts working according to the commands, and its movable rod extends or retracts, driving the connecting plate 7 to move up and down. The connecting plate 7 drives the mounting block 9 to slide up and down along the upper and lower sliding openings inside the mounting shell 4 through two connecting rods 8, thereby driving the lens mount 10 and the focusing lens 11 to move up and down, realizing the adjustment of the height of the focusing lens 11. During the movement of the focusing lens 11, the laser rangefinder 12 continuously measures the distance from the focusing lens 11 to the workpiece surface in real time and feeds the measurement data back to the control system. The control system compares the feedback distance data with the target focal length in real time, and dynamically adjusts the movement of the electric push rod 6 according to the comparison results to ensure that the focusing lens 11 can be accurately moved to the required height position, realizing the precise adjustment of the focal length.
[0040] Once the focusing lens 11 is adjusted to the desired focal length, the electric push rod 6 stops working, and the focusing lens 11 remains in that position. At this time, the laser cutting head 5 starts working, emitting a laser beam. After the laser beam is focused by the focusing lens 11, it performs a cutting operation on the workpiece on the worktable 1. During the cutting process, the laser rangefinder 12 continues to monitor the distance changes in real time. If the distance changes due to unevenness of the workpiece surface or other reasons, the control system will adjust the electric push rod 6 in a timely manner to ensure that the focal length is always kept at the optimal state, thus ensuring the cutting quality.
[0041] When the focusing lens 11 needs to be disassembled, cleaned, or replaced, the operator rotates the threaded shaft 14, causing it to rotate and move outward within the threaded sleeve 13. This moves the fixing plate 15 and the locking block 16 outward along the guide shaft 17 until the locking block 16 exits from the locking slot of the lens mount 10, releasing the lens mount 10 from its lock. At this point, the lens mount 10 and the focusing lens 11 can be removed from between the two mounting blocks 9 for maintenance. After maintenance, the lens mount 10 is reinserted between the two mounting blocks 9, and the threaded shaft 14 is rotated in the opposite direction to insert the locking block 16 into the locking slot, thus locking the lens mount 10 and preparing it for cutting on the next side.
[0042] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that achieves the desired beneficial effect can be implemented. Furthermore, all electrical components in this embodiment are electrically connected to the main controller and power supply. The main controller can be a conventional, known device such as a computer that performs control functions. Those skilled in the art can control the electrical components through simple programming, and the existing disclosed power connection technologies are common knowledge in the field. Therefore, this embodiment will not elaborate further on their specific structural composition and working principles.
[0043] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A laser cutting head device with adaptive focus adjustment, comprising a worktable (1), a support (2) fixedly connected to the top of the worktable (1), and a top frame (3) fixedly connected to the top of the support (2), characterized in that: The bracket (2) has a mounting shell (4) fixedly connected to its inner top wall, and a laser cutting head (5) is fixedly connected to the inner top wall of the mounting shell (4). The top wall of the top frame (3) is provided with an adjustment component for adjusting the focal length. The adjustment assembly includes an electric push rod (6) fixedly connected to the inner top wall of the top frame (3). One end of the movable rod of the electric push rod (6) is fixedly connected to a connecting plate (7). Two connecting rods (8) are fixedly connected to the bottom of the connecting plate (7). Mounting blocks (9) are fixedly connected to the bottom ends of the two connecting rods (8). A lens mount (10) is provided between the opposite sides of the two mounting blocks (9). A focusing lens (11) is fixedly connected to the inner side of the lens mount (10).
2. The laser cutting head device with adaptive focus adjustment according to claim 1, characterized in that: A laser rangefinder (12) is fixedly connected to the back of the mounting housing (4), and the two connecting rods (8) are respectively arranged on the left side and the right side of the bottom of the connecting plate (7).
3. The laser cutting head device with adaptive focus adjustment according to claim 1, characterized in that: Mounting holes are provided on the left and right sides of the mounting blocks (9) on the left side. A threaded sleeve (13) is fixedly connected to the inside of the mounting hole. A threaded shaft (14) is threadedly connected to the inside of the threaded sleeve (13). A fixing plate (15) is rotatably connected to the opposite end of the threaded shaft (14) on both the left and right sides. A locking block (16) is fixedly connected to the opposite side of the fixing plate (15) on both the left and right sides.
4. The laser cutting head device with adaptive focus adjustment according to claim 1, characterized in that: Both the right side of the mounting block (9) on the left and the left side of the mounting block (9) on the right are provided with openings that are compatible with the locking block (16).
5. The laser cutting head device with adaptive focus adjustment according to claim 1, characterized in that: The left and right side walls of the mirror base (10) are provided with locking slots that are compatible with the locking block (16).
6. The laser cutting head device with adaptive focal length adjustment according to claim 1, characterized in that: The mounting shell (4) has upper and lower sliding openings on both the left and right sides inside, which are adapted to the mounting block (9). The mounting block (9) is slidably connected to the inner side of the corresponding upper and lower sliding openings.
7. The laser cutting head device with adaptive focus adjustment according to claim 3, characterized in that: The upper and lower sides of the fixed plate (15) are provided with guide holes, and the inner side of the guide holes is slidably connected to a guide shaft (17).
8. The laser cutting head device with adaptive focus adjustment according to claim 7, characterized in that: The left end of the guide shaft (17) is fixedly connected to the inner left side wall of the mounting block (9), and the right end of the guide shaft (17) is fixedly connected to the inner right side wall of the mounting block (9).