A laser processing optical center recognition device

Abstract

The utility model discloses a kind of laser processing optical center recognition devices, comprising: mounting seat;Image acquisition module, image acquisition module is set to mounting seat, image acquisition module includes image unit and be set to the light protection window and optical filter unit in front of image unit, optical filter unit is used to filter the light outside of preset wave band, image unit is used to collect light spot area image;Light supplementing module, light supplementing module includes the light supplementing lamp being set to the periphery of image unit, light supplementing lamp is used to project illuminating light to light spot area;Processing module, processing module is connected with image unit signal, processing module is used to receive image unit collection image, and according to collection image identification laser processing optical center's position information, realize high-precision automatic identification to optical center position in laser processing process by image unit cooperation light supplementing module and processing module, to greatly improve adjustment accuracy and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of laser processing technology, and more specifically to a laser processing optical core identification device. Background Technology

[0002] Laser cutting refers to the process of using a focused high-energy laser beam to melt materials and form a strip of thermally melted material to complete the cutting. In laser cutting, whether the laser beam is centered at the nozzle center often determines the quality of the cutting. If the laser center is not centered, it will greatly affect the stability of batch cutting.

[0003] In response, the traditional laser cutting optical center adjustment operation usually requires the operator to attach a piece of transparent tape to the nozzle and use laser spotting to leave a dot on the transparent tape. The operator then judges the position of the optical center by visually observing the position relationship between the processing dot on the tape and the nozzle outline, and adjusts the position of the cutting head focusing lens to achieve coaxiality between the focused beam and the nozzle center. The above method still has the problem of poor adjustment accuracy, so it needs to be improved. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a laser processing optical center identification device to realize the automatic identification of the optical center position, thereby greatly improving the adjustment accuracy.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A laser processing optical center identification device, comprising: Mounting base; An image acquisition module is mounted on a mounting base. The image acquisition module includes an image unit, a light-transmitting protective window, and a filter unit located in front of the image unit. The filter unit is used to filter light outside a preset wavelength band, and the image unit is used to acquire images of the light spot area. A supplementary lighting module, comprising supplementary lights disposed around the image unit, the supplementary lights being used to project illumination light onto the light spot area; The processing module is connected to the image unit via a signal. The processing module is used to receive images acquired by the image unit and identify the position information of the laser processing optical center based on the acquired images.

[0006] As a further improvement of this invention, the image unit includes a camera and a lens connected to each other.

[0007] As a further improvement of this utility model, the fill light is ring-shaped and sleeved on the outside of the lens.

[0008] As a further improvement of this utility model, the light output direction of the fill light is inclined to the optical axis of the lens.

[0009] As a further improvement of this utility model, the mounting base is provided with a control mechanism and a cover plate is connected to the control mechanism. The control mechanism is used to drive the cover plate to move so as to adjust the cover plate to cover the image acquisition module or to separate the cover plate from the image acquisition module.

[0010] As a further improvement of this utility model, the control mechanism is a cylinder, and the cylinder output section is fixedly connected to the cover plate.

[0011] As a further improvement of this utility model, the mounting base is provided with a calibration block.

[0012] As a further improvement of this utility model, the mounting base is provided with a cleaning brush, which is used to clean the nozzle.

[0013] As a further improvement of this utility model, the cleaning brush, calibration block and image acquisition module are arranged in a straight line.

[0014] The beneficial effects of this utility model are: 1. By combining the image unit with the supplementary lighting module and the processing module, high-precision automatic identification of the optical center position during laser processing is achieved, thereby greatly improving the adjustment accuracy and efficiency; 2. A light-transmitting protective window, combined with a movable cover, is used to prevent dust from contaminating the optical components during processing, thus ensuring the long-term stable operation of the identification device on the machine tool; 3. By integrating cleaning brushes and calibration blocks, the entire process of cleaning, calibrating, and subsequently identifying the optical center of the laser nozzle is automated and integrated. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall installation of this utility model; Figure 2 This is a schematic cross-sectional view of the image acquisition module of this utility model. Figure 3 This is a schematic diagram of the cylinder installation of this utility model.

[0016] Reference numerals: 1. Mounting base; 2. Image acquisition module; 3. Image unit; 4. Light-transmitting protective window; 5. Filter unit; 6. Fill light module; 7. Fill light lamp; 8. Camera; 9. Lens; 10. Control mechanism; 11. Cover plate; 12. Cylinder; 13. Calibration block; 14. Cleaning brush. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals.

[0018] like Figure 1-3As shown, a laser processing optical center identification device is used to identify the optical center of a laser head to improve the accuracy of laser processing. In this embodiment, the laser head is equipped with an indicator red light, which is emitted outward through a nozzle. This part is prior art and will not be described in detail here. In another embodiment, the indicator light can also be a light source of other colors.

[0019] Specifically, this embodiment discloses a laser processing optical center identification device, including a mounting base 1, which is used to connect to a machine tool so that the laser head moves to correspond with the mounting base 1.

[0020] It also includes an image acquisition module 2, which is mounted on the mounting base 1. The image acquisition module 2 includes an image unit 3, a light-transmitting protective window 4 and a filter unit 5 located in front of the image unit 3. The filter unit 5 is used to filter light outside the preset wavelength band, and the image unit 3 is used to acquire images of the light spot area.

[0021] Specifically, the light-transmitting protective window 4 is made of transparent glass and is used to isolate the outside world from the image unit 3 to prevent dust and other contaminants from entering and causing pollution.

[0022] Specifically, the filtering unit 5 is a filter. In other embodiments, the filtering unit 5 may also be a pre-existing coated filter or a filter implemented by a processor.

[0023] It also includes a supplementary lighting module 6, which includes supplementary lighting lamps 7 disposed around the image unit 3. The supplementary lighting lamps 7 are used to project illumination light onto the light spot area.

[0024] The supplementary lighting module 6 ensures the quality of the light spot acquired by the image unit 3, thereby guaranteeing the accuracy of subsequent recognition.

[0025] It also includes a processing module, which is connected to the image unit 3 by a signal. The processing module is used to receive the image acquired by the image unit 3 and identify the position information of the laser processing optical center based on the acquired image.

[0026] Specifically, the processing module can be a standalone industrial control computer, a processor integrated into the camera, or part of a machine tool CNC system. In this embodiment, it includes an algorithm module preset on the terminal, which is used to calculate the offset on the two-dimensional plane of the laser processing optical center based on the image, thereby completing the precise adjustment of the optical center based on the offset.

[0027] Specifically, the algorithm module calculates the center coordinates of the light spot using the centroid algorithm.

[0028] When in use, the laser head moves and aligns with the image acquisition module 2. At this time, the laser head only emits an indicator red light. This light passes through the light-transmitting protective window 4 and the filter unit 5 and forms a light spot. The image unit 3 then acquires an image of the light spot area. Simultaneously, the processing module obtains the position information of the laser processing optical center based on the light spot image recognition, and adjusts the laser head according to this position information to greatly improve the optical center adjustment accuracy.

[0029] Specifically, the image unit 3 includes a camera 8 and a lens 9 that are connected to each other.

[0030] Clear and reliable images can be obtained through camera 8 and lens 9, thereby improving the accuracy of subsequent recognition.

[0031] Preferably, the fill light 7 is in a ring shape and is fitted around the outside of the lens 9.

[0032] The ring-shaped fill light 7 ensures that the brightness and darkness of the light spot on the lens 9 are uniform and stable.

[0033] Preferably, the light output direction of the supplementary light 7 is tilted to the optical axis of the lens 9.

[0034] The supplementary light 7, which is set at an angle, can improve the lighting effect of the light source located below.

[0035] Preferably, the mounting base 1 is provided with a control mechanism 10 and a cover plate 11 is connected to the control mechanism 10. The control mechanism 10 is used to drive the cover plate 11 to move so as to adjust the cover plate 11 to cover the image acquisition module 2 or to separate the cover plate 11 from the image acquisition module 2.

[0036] By setting up the control mechanism 10 and the cover plate 11, the image acquisition module 2 can be covered during the cutting process, thereby avoiding excessive dust contact with the image acquisition module 2 and causing contamination.

[0037] Specifically, the control mechanism 10 is a cylinder 12, and the output section of the cylinder 12 is fixedly connected to the cover plate 11.

[0038] In another embodiment, the control mechanism 10 is a motor transmission belt structure to complete the linear drive of the cover plate 11.

[0039] The overall structure can be made more streamlined by using cylinder 12 for driving.

[0040] Preferably, the mounting base 1 is provided with a calibration block 13.

[0041] The position of the laser head can be calibrated before the optical center is identified by setting the calibration block 13, thereby ensuring the corresponding position of the nozzle after the laser head moves to the image acquisition module 2.

[0042] Preferably, the mounting base 1 is provided with a cleaning brush 14, which is used to clean the nozzle.

[0043] The use of a clear brush reduces residual processing material on the nozzle, thereby further improving subsequent recognition accuracy and reducing interference.

[0044] Preferably, the cleaning brush 14, calibration block 13 and image acquisition module 2 are arranged in a straight line.

[0045] The arrangement of the cleaning brush 14, calibration block 13 and image acquisition module 2 enables the laser head to perform cleaning, calibration and recognition operations in sequence, thereby further accelerating the optical center recognition and adjustment speed.

[0046] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A laser processing optical center identification device, characterized in that, include: Mounting base (1); Image acquisition module (2), the image acquisition module (2) is mounted on the mounting base (1), the image acquisition module (2) includes an image unit (3) and a light-transmitting protective window (4) and a filter unit (5) disposed in front of the image unit (3), the filter unit (5) is used to filter light outside the preset wavelength band, and the image unit (3) is used to acquire images of the light spot area; The supplementary lighting module (6) includes a supplementary light (7) disposed around the image unit (3), and the supplementary light (7) is used to project illumination light onto the light spot area; The processing module is connected to the image unit (3) by signal. The processing module is used to receive the image acquired by the image unit (3) and identify the position information of the laser processing optical center based on the acquired image.

2. The laser processing optical center identification device according to claim 1, characterized in that, The image unit (3) includes a camera (8) and a lens (9) connected to each other.

3. The laser processing optical center identification device according to claim 2, characterized in that, The fill light (7) is ring-shaped and fitted around the outside of the lens (9).

4. The laser processing optical center identification device according to claim 3, characterized in that, The light output direction of the fill light (7) is tilted to the optical axis of the lens (9).

5. The laser processing optical center identification device according to claim 1, characterized in that, The mounting base (1) is provided with a control mechanism (10) and a cover plate (11) is connected to the control mechanism (10). The control mechanism (10) is used to drive the cover plate (11) to move so as to adjust the cover plate (11) to cover the image acquisition module (2) or to separate the cover plate (11) from the image acquisition module (2).

6. The laser processing optical center identification device according to claim 5, characterized in that, The control mechanism (10) is a cylinder (12), and the output section of the cylinder (12) is fixedly connected to the cover plate (11).

7. The laser processing optical center identification device according to claim 1, characterized in that, The mounting base (1) is provided with a calibration block (13).

8. The laser processing optical center identification device according to claim 7, characterized in that, The mounting base (1) is provided with a cleaning brush (14), which is used to clean the nozzle.

9. A laser processing optical center identification device according to claim 8, characterized in that, The cleaning brush (14), calibration block (13) and image acquisition module (2) are arranged in a straight line.

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