A coaxial instrument for laser nozzle optical center calibration

Abstract

This utility model relates to a coaxiality apparatus for laser nozzle optical center calibration, comprising a locking assembly, a mounting cylinder, a mounting base, and a base plate. The locking assembly is fixedly connected to the mounting cylinder by screws, and the mounting base is movably mounted to the mounting cylinder by threads. The base plate is mounted on the bottom of the mounting base. The mounting base houses a camera module, multiple LED beads, a window plate, and a blue light board. The camera module is connected and fixed to the mounting base. The blue light board has multiple annularly distributed LED bead mounting holes, through which the LED beads are welded to the blue light board, and all LED beads are tilted inward. This utility model, through a reasonable design and a closed-loop process of "clamping and fixing → filtering and imaging → signal transmission → visual adjustment," transforms traditional experience-based manual adjustment into image-based precise operation, significantly improving the efficiency and accuracy of coaxiality adjustment.

Description

Technical Field

[0001] This utility model relates to the field of laser nozzle calibration technology, and in particular to a coaxial instrument for laser nozzle optical center calibration. Background Technology

[0002] In industrial processing such as laser cutting and precision welding, it is necessary to ensure the coaxiality between the cutting nozzle and the workpiece to ensure processing accuracy and quality.

[0003] Currently, in practical operations where the laser focus is centered on the airflow nozzle, the operator determines whether adjustment is needed based on the positional relationship between the ablation hole formed by the laser pulse on the transparent tape and the nozzle imprint left on the tape. If the two are not concentric, the position of the focusing lens group must be roughly adjusted according to the direction and magnitude of the deviation. This method has many drawbacks. Although simple and inexpensive, it is unreliable and heavily relies on the operator's experience and judgment. This is even more difficult with larger aperture nozzles. In other words, traditional coaxial adjustment methods mostly rely on manual adjustment based on the operator's experience, resulting in low efficiency and difficulty in guaranteeing accuracy. Therefore, there is an urgent need to develop a coaxial instrument that is simple in structure, easy to operate, provides real-time visualization, and offers high adjustment accuracy. Utility Model Content

[0004] Therefore, it is necessary to provide a coaxial instrument for calibrating the optical center of a laser nozzle to address the above problems.

[0005] A coaxial instrument for laser nozzle optical center calibration includes a locking assembly, a mounting cylinder, a mounting base, and a base plate. The locking assembly is fixedly connected to the mounting cylinder by screws. The mounting base is movably installed to the mounting cylinder by threads. The base plate is installed at the bottom of the mounting base. The mounting base contains a camera module, multiple LED beads, a window plate, and a blue light board. The camera module is connected and fixed to the mounting base. The blue light board has multiple annularly distributed LED bead mounting holes. The multiple LED beads are welded to the blue light board through the multiple LED bead mounting holes, and all of the multiple LED beads are inclined inward.

[0006] In one embodiment, the locking assembly includes a first locking mounting block and a second locking mounting block, wherein the first locking mounting block and one side of the second locking mounting block are movably connected by a hinge, and the free end of the other side is fixed by a locking screw.

[0007] In one embodiment, the mounting base is further provided with a Type-C interface board, and the Type-C interface board is electrically connected to the camera module.

[0008] In one embodiment, the blue light panel is electrically connected to the camera module via pins.

[0009] In one embodiment, the camera module includes a filter, which is a blue light narrowband filter.

[0010] In one embodiment, the window is fixed to the mounting base and located above the blue light panel, and the window is made of transparent quartz glass.

[0011] In one embodiment, the base plate is threadedly connected and fixed to the mounting base.

[0012] In one embodiment, the mounting base is further provided with anti-slip grooves around its outer surface.

[0013] The aforementioned coaxial instrument for laser nozzle optical center calibration, by setting up a camera module, blue light board, multiple LED beads and filters, realizes the visual monitoring of the cutting nozzle end face. The operator can clearly observe the position of the optical center in the laser nozzle hole, which is convenient for precise adjustment and improves the adjustment accuracy and efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model from another angle;

[0016] Figure 3 This is an exploded view of the present invention;

[0017] Figure 4 This is a schematic diagram of the internal structure of the mounting base of this utility model;

[0018] Figure 5 This is a schematic diagram of the mounting base structure of this utility model;

[0019] Figure 6 This is a cross-sectional view of the present invention.

[0020] 1. Locking assembly; 11. First locking mounting block; 12. Second locking mounting block; 13. Locking screw; 14. Clamping part; 2. Mounting cylinder; 3. Mounting base; 31. Type-C interface board; 4. Base plate; 5. Camera module; 51. Filter; 6. LED lamp bead mounting hole; 7. Window piece; 8. Blue light board; 81. LED lamp bead; 9. Anti-slip groove; 10. Laser nozzle; 101. Laser nozzle hole; 102. Laser nozzle edge. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0022] It should be noted that when an element is said to be "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly on" another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] See Figures 1-6 A coaxial instrument for calibrating the optical center of a laser nozzle includes a locking assembly 1, a mounting cylinder 2, a mounting base 3, and a base plate 4. The locking assembly 1 is fixedly connected to the mounting cylinder 2 by screws. The mounting base 3 is movably installed to the mounting cylinder 2 by threads. The base plate 4 is installed at the bottom of the mounting base 3. The mounting base 3 houses a camera module 5, multiple LED beads 81, a window 7, and a blue light board 8. The camera module 5 is fixedly connected to the mounting base 3 by screws. The blue light board 8 has multiple annularly distributed LED bead mounting holes 6. The multiple LED beads 81 are welded to the blue light board 8 through the multiple LED bead mounting holes 6, and all of the multiple LED beads 81 are inclined inwards. By setting multiple inwardly inclined LED beads 81, multiple beams of light can be focused onto the nozzle end face.

[0025] Furthermore, the locking assembly 1 includes a first locking mounting block 11 and a second locking mounting block 12. The first locking mounting block 11 and the second locking mounting block 12 are movably connected on one side by a hinge, and the free end on the other side is fixed by a locking screw 13. By setting the first locking mounting block 11 and the second locking mounting block 12, a clamping part 14 with a hollow center is formed, which can be used to insert the laser nozzle 10 and clamp and fix the edge 102 of the laser nozzle. Since the groove structure of the clamping part 14 matches the edge 102 of the laser nozzle exactly, it can accurately position the laser nozzle 10 while fixing and clamping it, so that the end face of the laser nozzle 10 is exactly on the focal plane of the camera module 5, and the two remain coaxial without offset.

[0026] Furthermore, the mounting base 3 is also provided with a Type-C interface board 31, and the Type-C interface board 31 is electrically connected to the camera module 5. The Type-C interface board 31 is connected to the camera module 5 through a through-hole cable harness for power supply to external devices and video signal transmission;

[0027] Furthermore, the blue light panel 8 is electrically connected to the camera module 5 via pins. Multiple LED beads 81 on the blue light panel 8 illuminate when powered on.

[0028] Furthermore, the camera module 5 includes a filter 51, which is a narrowband blue light filter. By setting the filter 51, which adopts a narrowband blue light filtering design, only blue light of a specific wavelength (matching the illumination wavelength of the blue light panel 8 in the device) is allowed to pass through, effectively filtering stray light and non-target wavelength light from the environment; and while filtering stray light, it effectively reduces the brightness of the red light center of the laser path, so that the red light center and the outline of the laser nozzle hole 101 can be clearly presented in the same image, avoiding overexposure and providing direct visual evidence for judging the coaxiality of the two.

[0029] Furthermore, the window 7 is fixed to the mounting base 3 and located above the blue light panel 8. The window 7 is made of transparent quartz glass. By making the window 7 of transparent quartz glass, light can be transmitted while preventing dust from entering the cavity and contaminating the light path, thus avoiding a decrease in image quality. It also improves scratch resistance.

[0030] Furthermore, the base plate 4 is threadedly connected and fixed to the mounting base 3. It is screwed in only after the camera module 5 and the Type-C interface board 31 are installed, thus providing a sealed, dustproof, and waterproof function.

[0031] Furthermore, the mounting base 3 is also provided with anti-slip grooves 9 around its outer surface. By providing the anti-slip grooves 9, it is not only easier to hold, but also increases friction, which is beneficial for operators to use the coaxial instrument.

[0032] The working process of this utility model is as follows: When the operator calibrates the optical center of the laser nozzle 10, the locking assembly 1 is used to fix the laser nozzle 10. Specifically, the first locking mounting block 11 and the second locking mounting block 12 are hinged to clamp the edge 102 of the laser nozzle. Then, the locking screw 13 is used to lock the movable ends of the first locking mounting block 11 and the second locking mounting block 12 to complete the clamping and fixing of the laser nozzle 10.

[0033] Next, multiple LED beads 81 on the blue light panel 8 emit blue light of a specific wavelength, which is focused onto the end face of the cutting nozzle. The tilt angle design of the multiple LED beads 81 ensures that the blue light is concentrated on the nozzle end face and surrounding area, forming a uniform and high-contrast lighting environment and avoiding dim and blurry images caused by light scattering. The blue light reflected from the cutting nozzle end face passes through the transparent quartz glass window 7 and enters the macro lens of the camera module 5. The blue light narrowband filter 51 between the macro lens and the photosensitive chip in the camera module 5 filters out stray light of other wavelengths in the environment (such as natural light and equipment light sources), allowing only blue light of a specific wavelength to pass through; the narrowband filter coating on the surface of the filter 51 can effectively reduce the intensity of the red light at the optical center, avoiding overexposure of the photosensitive chip. Finally, the camera's photosensitive chip converts the light signal into an electrical signal, forming a clear image of the nozzle end face and the red light center. The camera module 5 then transmits the processed image electrical signal to the Type-C interface board 31 via a direct-plug cable. The interface board draws power from external devices (such as computers or smartphones) to power the camera module 5 and the blue light board 8. Simultaneously, it transmits the image signal to external devices for real-time high-definition display. Operators can visually observe the coaxiality of the red light center and the laser nozzle hole 101 through the real-time displayed image. If the light center deviates from the center of the laser nozzle hole 101, the external laser optical path system can be adjusted until the red light center and the center of the laser nozzle hole 101 in the image are completely aligned, achieving high-precision coaxial adjustment and enabling "visual" monitoring.

[0034] It should be noted that due to dimensional errors in the processing of the laser nozzle 10, its end face may not coincide with the focal plane of the camera module 5 after clamping and fixing. The mounting base 3 and the mounting cylinder 2 are connected by threads. Rotating the mounting base 3 can change its screw-in amount relative to the mounting cylinder 2, thereby adjusting the axial position of the camera module 5 so that the focal plane of the lens falls precisely on the end face of the laser nozzle 10, ensuring clear imaging. The edge 102 of the laser nozzle is clamped by the enclosed space of the first locking mounting block 11 and the second locking mounting block 12. The locking assembly 1 and the mounting cylinder 2 are detachably connected by screws. The locking assembly 1 can firmly fix the laser nozzle 10 and is easy to disassemble and quickly replace. Replacing the locking assembly 1 with different sizes can match laser nozzles 10 of different shapes, which can greatly expand its application scenarios.

[0035] Based on the image displayed on the screen, the operator fine-tunes the optical path to ensure that the red light center is coaxial with the laser nozzle hole 101. The adjustment process is visible in real time, significantly improving accuracy. The base plate 4 is connected to the mounting base 3 via threads, sealing the cavity containing the camera module 5 and the Type-C interface board 31, achieving dust and water resistance and ensuring stable operation of the internal electronic components in industrial environments.

[0036] The aforementioned coaxial instrument for laser nozzle optical center calibration, through the arrangement of a camera module 5, a blue light board 8, multiple LED beads 81, and a filter 51, enables visual monitoring of the cutting nozzle end face. Operators can clearly observe the position of the red light optical center in the laser nozzle hole 101, facilitating precise adjustment and improving adjustment accuracy and efficiency.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A coaxial instrument for laser nozzle optical center calibration, comprising a locking assembly, a mounting cylinder, a mounting seat and a bottom plate, the locking assembly is fixedly connected with the mounting cylinder through a screw, the mounting seat is movably mounted with the mounting cylinder through a thread, and the bottom plate is installed at the bottom of the mounting seat, characterized in that, The mounting base contains a camera module, multiple LED beads, a window piece, and a blue light board. The camera module is connected and fixed to the mounting base. The blue light board has multiple ring-shaped LED bead mounting holes. The multiple LED beads are welded to the blue light board through the multiple LED bead mounting holes, and all the multiple LED beads are tilted inward.

2. A coaxial instrument for laser nozzle optical center alignment according to claim 1, wherein, The locking assembly includes a first locking mounting block and a second locking mounting block. The first locking mounting block and the second locking mounting block are movably connected on one side by a hinge, and the free end on the other side is fixed by a locking screw.

3. A coaxial instrument for laser nozzle optical center alignment according to claim 2, wherein, The mounting base is also equipped with a Type-C interface board, and the Type-C interface board is electrically connected to the camera module.

4. A coaxial instrument for laser nozzle optical center alignment according to claim 3, wherein, The blue light board is electrically connected to the camera module via pins.

5. A coaxial instrument for laser nozzle optical center alignment according to claim 1, wherein, The camera module is equipped with a filter, which is a blue light narrowband filter.

6. A coaxial instrument for laser nozzle optical center alignment according to claim 1, wherein, The window is fixed to the mounting base and located above the blue light panel. The window is made of transparent quartz glass.

7. A coaxial instrument for laser nozzle optical center alignment according to claim 1, wherein, The base plate is threadedly connected and fixed to the mounting base.

8. A coaxial instrument for laser nozzle optical center alignment according to any one of claims 1-7, wherein, The mounting base is also provided with anti-slip grooves around its outer surface.

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