A laser machining nozzle changing device

Abstract

The utility model discloses a kind of laser processing nozzle replacement device, comprising: mounting seat and receiving unit, receiving unit quantity corresponds with installation station, receiving unit includes rotating seat, the upper end of rotating seat is equipped with slot, slot is used for nozzle and separates along its axial direction carding;Driving mechanism, driving mechanism is respectively transmission connection multiple rotating seats and is used to drive multiple rotating seat synchronous rotation;Optical center identification unit, optical center identification unit includes identification seat and image acquisition module, image acquisition module is set in identification seat, image acquisition module is used to collect optical center image, through multiple receiving unit cooperation driving mechanism to realize the dismounting use of nozzle, simultaneously, the optical center identification of laser head before and after the dismounting of nozzle is realized by the setting of optical center identification unit, to ensure the cooperation degree of nozzle and receiving unit when nozzle is disassembled, and the axial alignment degree of nozzle and laser head is ensured when nozzle is installed, to improve the overall accuracy before and after the dismounting of laser head and nozzle.

Description

Technical Field

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

[0002] During laser processing, different nozzle models are required to achieve the best processing results due to different processing requirements (such as cutting plates of different thicknesses). Therefore, it is necessary to change the nozzle model frequently to achieve the desired effect.

[0003] Traditionally, manual twisting is often used to address this issue, but this method is inefficient. Therefore, referring to the prior patent application CN202311407661.1, an automatic nozzle replacement module for laser cutting heads is disclosed. Specifically, the nozzle mounting and dismounting structure, in conjunction with a drive motor, completes the assembly and disassembly of the nozzle and the laser head. However, before and after nozzle replacement, the operator needs to calibrate the optical center of the laser head, requiring the laser head to be moved to a separate calibration tool for calibration. This makes it difficult to achieve consistent processing accuracy and thus requires improvement. 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 nozzle replacement device, which realizes optical center calibration before and after nozzle disassembly and assembly by setting up an optical center recognition unit, thereby ensuring the consistency of processing accuracy.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A laser processing nozzle changing device, comprising: Mounting base, wherein the mounting base is provided with at least two spaced-apart mounting positions; The receiving unit, the number of which corresponds to the installation station, includes a rotating seat, which is rotatably connected to the installation station. The upper end of the rotating seat is provided with a slot for engaging the nozzle, which is used for engaging or disengaging the nozzle along its axial direction. A drive mechanism is provided, which is connected to multiple rotating seats and drives the multiple rotating seats to rotate synchronously. The optical center recognition unit includes a recognition base and an image acquisition module. The image acquisition module is disposed inside the recognition base and is used to acquire optical center images.

[0006] As a further improvement of this utility model, the receiving unit includes a receiving seat, the receiving seat includes a mounting plate, the mounting plate is fixedly connected to the mounting seat by bolts, and the mounting plate is provided with a through hole.

[0007] As a further improvement of this utility model, the rotating seat includes an outer tube and an inner tube. The outer tube extends into the through hole and is rotatably connected to the through hole. The inner tube is axially movably disposed inside the outer tube. The slot is a groove circumferentially disposed on the inner side of the outer tube.

[0008] As a further improvement of this utility model, an elastic element is provided between the inner tube and the outer tube.

[0009] As a further improvement of this utility model, the driving mechanism includes a motor, a drive gear, and multiple gear sets. Each rotating seat is provided with a gear set. The gear set includes a small gear and a large gear that are coaxially and fixedly connected to the rotating seat. The small gear and the large gear in each gear set mesh with each other and are linked. The large gears in adjacent gear sets mesh with each other and are linked. The drive gear meshes with the large gear. The motor is used to drive the drive gear to rotate.

[0010] As a further improvement of this utility model, the mounting base is provided with a sealing plate and a displacement mechanism. The displacement mechanism is connected to the sealing plate and is used to drive the sealing plate to reciprocate, so as to adjust the sealing plate to cover or move away from the installation position.

[0011] As a further improvement of this utility model, the image acquisition module includes an image unit and a light-transmitting protective window and a filter unit disposed in front of the image unit. The filter unit is used to filter light outside the preset wavelength band, and the image unit is used to acquire images of the light spot area.

[0012] As a further improvement of this invention, the image unit includes a camera and a lens connected to each other.

[0013] As a further improvement of this utility model, the identification base is provided with a supplementary lighting module, which includes supplementary lights disposed around the image acquisition module, and the supplementary lights are used to project illumination light onto the light spot area.

[0014] As a further improvement of this utility model, the mounting base is provided with a cleaning brush, which is used to clean the nozzle.

[0015] The beneficial effects of this utility model are: 1. Multiple receiving units work in conjunction with a drive mechanism to enable the disassembly and assembly of the nozzle. At the same time, the optical center recognition unit enables the optical center recognition of the laser head before and after nozzle disassembly and assembly. This ensures the fit between the nozzle and the receiving unit during nozzle disassembly and the alignment between the nozzle and the laser head axis during nozzle installation, thereby improving the overall accuracy of the laser head and nozzle before and after disassembly and assembly.

[0016] 2. By using a motor in conjunction with multiple gear sets, multiple rotating seats can be driven simultaneously. At the same time, the arrangement of large and small gears allows the receiving units to be arranged both horizontally and vertically, thereby further expanding the installation range of the receiving units and increasing the number of nozzles that can be installed. 3. By setting up the supplementary lighting module, high-precision automatic identification of the optical center position during laser processing is achieved, thereby greatly improving adjustment accuracy and efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall installation of this utility model.

[0018] Figure 2 This is a schematic diagram of the installation of the drive mechanism of this utility model.

[0019] Figure 3 This is a schematic cross-sectional view of the installation of the receiving unit of this utility model.

[0020] Figure 4 This is a schematic cross-sectional view of the image acquisition module of this utility model. Figure 5 This is a schematic diagram of the cylinder installation of this utility model.

[0021] Reference numerals: 1. Mounting base; 2. Mounting station; 3. Receiving unit; 4. Rotating seat; 5. Slot; 6. Drive mechanism; 7. Identification seat; 8. Image acquisition module; 9. Mounting plate; 10. Through hole; 11. Outer tube; 12. Inner tube; 13. Elastic element; 14. Motor; 15. Drive gear; 16. Pinion; 17. Gear; 18. Enclosure plate; 19. Displacement mechanism; 20. Image unit; 21. Light-transmitting protective window; 22. Filter unit; 23. Camera; 24. Lens; 25. Fill light module; 26. Cleaning brush. Detailed Implementation

[0022] 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.

[0023] like Figure 1-5 As shown, a laser processing nozzle replacement device includes a mounting base 1, a receiving unit 3, a driving mechanism 6, an optical center identification unit, and a cleaning brush 26.

[0024] Specifically, the mounting base 1 is a frame structure, and at least two spaced installation stations 2 are provided on the top surface of the mounting base 1. In this embodiment, there are 14 installation stations 2, and the 14 installation stations 2 are evenly arranged in two rows. Each installation station 2 is used to install a receiving unit 3.

[0025] Furthermore, the number of receiving units 3 corresponds to the installation station 2. The receiving unit 3 is used to receive and accommodate the nozzle. Each receiving unit 3 includes a receiving seat and a rotating seat 4. The receiving seat includes a mounting plate 9. The mounting plate 9 is detachably fixed to the installation station 2 of the mounting seat 1 by bolts. The mounting plate 9 is provided with a through hole 10 corresponding to the installation station 2. At the same time, the installation station 2 is provided with a through hole 10 corresponding to the through hole 10, so that the rotating seat 4 partially passes through the through hole 10 and the through hole 10, thereby optimizing the space above the mounting seat 1 and making the overall structure more compact.

[0026] Specifically, the rotating seat 4 includes an outer tube 11 and an inner tube 12. One end of the outer tube 11 extends into the through hole 10 and forms a rotatable connection with the through hole 10. Specifically, the mounting plate 9 is provided with a bearing, which is sleeved on the outside of the outer tube 11 to achieve a rotatable engagement with the outer tube 11. The inner tube 12 is coaxially disposed inside the outer tube 11 and can move up and down along its axial direction. A ring-shaped groove is formed on the inner sidewall of the outer tube 11, which forms a slot 5 for engaging the nozzle. In use, the nozzle is inserted into the slot 5 from above. An elastic element 13 is provided between the inner tube 12 and the outer tube 11. In this embodiment, the elastic element 13 is a compression spring. The compression spring is used to keep the inner tube 12 moving upward, so that when the laser head moves downward, it can contact the nozzle and drive the inner tube 12 to move downward, so that the compression spring is compressed and obtains elastic force, thereby giving the nozzle the force to contact the laser head, so as to facilitate the screw connection between the nozzle and the laser head. When the laser head does not contact the nozzle, the compression spring is in a relaxed state, and the nozzle located in the slot 5 is still limited and locked by the slot 5, thereby maintaining the stability of the nozzle and the slot 5.

[0027] In this embodiment, the nozzle includes a polygonal outer edge, and the slot 5 is adapted to the outer edge to achieve a limiting engagement between the two.

[0028] Furthermore, the drive mechanism 6 is used to synchronously drive the rotating seat 4 to rotate, thereby simplifying the drive method and reducing the difficulty of control.

[0029] Specifically, the drive mechanism 6 includes a motor 14, a drive gear 15, and multiple gear sets. Each rotating seat 4 has a gear set corresponding to its lower end. Each gear set includes a pinion 16 and a large gear 17 coaxially fixed to the rotating seat 4. Since the rotating seats 4 are arranged in two rows in this embodiment, every two rotating seats 4 form a group, and the pinion 16 and large gear 17 are coaxially fixed to each other in each group. The pinion 16 and large gear 17 in each gear set mesh and are linked together. Simultaneously, the large gears 17 in adjacent gear sets mesh and are linked together, so that when either a single pinion 16 or large gear 17 rotates, it can simultaneously drive the other gears to rotate. The drive gear 15 meshes with the large gear 17, and the motor 14 drives the drive gear 15 to rotate, thereby achieving simultaneous driving of multiple large gears 17 and pinion 16.

[0030] To ensure the stability of the drive structure, the pinions 16 of adjacent gear sets are independent of each other to avoid contact between them and interference with the transmission.

[0031] Furthermore, the optical center identification unit is integrated on the mounting base 1 for online detection of whether the laser optical center is aligned with the center of the nozzle 4. The operator calibrates the laser head's optical center position based on the optical center data. The optical center identification unit includes an identification base 7 and an image acquisition module 8. The identification base 7 is fixed on the mounting base 1, and the image acquisition module 8 is located inside the identification base 7. Specifically, the image acquisition module 8 includes an image unit 20, a filter unit 22, and a light-transmitting protective window 21 arranged sequentially from bottom to top. The image unit 20 consists of a camera 23 and a lens 24. The filter unit 22 filters out interfering light, allowing only light of a preset wavelength (such as the wavelength of the laser's indicator light) to pass through. The light-transmitting protective window 21 is made of a high-transmittance, wear-resistant material (such as sapphire glass) to prevent processing spatter from contaminating the internal image unit 20. When the rotating base 4, carrying the nozzle to be calibrated, rotates above the optical center identification unit, the indicator light inside the laser head emits a beam of light, and the image acquisition module 8 acquires the image of the light spot passing through the nozzle, analyzing the optical center position through image processing algorithms.

[0032] Furthermore, the identification base 7 also includes a supplementary lighting module 25. The supplementary lighting module 25 includes a light strip surrounding the image acquisition module 8, which emits illumination light from its inner side when powered on. When ambient light is insufficient or when enhanced contrast is required, the supplementary lighting can project illumination light onto the light spot area to ensure the clarity of image acquisition.

[0033] Furthermore, the mounting base 1 is also provided with a sealing plate 18 and a displacement mechanism 19. In this embodiment, the displacement mechanism 19 is specifically a cylinder. The cylinder is fixed on the mounting base 1, and the cylinder output end is connected to the sealing plate 18. The sealing plate 18 can reciprocate under the drive of the displacement mechanism 19. When the nozzle does not need to be replaced, the sealing plate 18 moves to a position that covers all installation stations 2, effectively preventing dust and splashes from contaminating the nozzles to be used. When replacement is required, the sealing plate 18 is removed, exposing the installation station 2.

[0034] Furthermore, a cleaning brush 26 is provided on the upper surface of the mounting base 1. When the replaced nozzle passes through the cleaning brush 26, its outer surface and end face can be brushed to remove the attached slag and dust, thereby reducing the problem of slag and other materials entering the slot 5 and affecting the stability of the nozzle position, so as to prepare for subsequent processing.

[0035] 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 nozzle changing device, characterized in that, include: Mounting base (1), wherein at least two spaced mounting stations (2) are provided on the mounting base (1); The receiving unit (3) has a number corresponding to the installation station (2). The receiving unit (3) includes a rotating seat (4), which is rotatably connected to the installation station (2). The upper end of the rotating seat (4) is provided with a slot (5) for engaging the nozzle. The slot (5) is used for engaging or disengaging the nozzle along its axial direction. The driving mechanism (6) is connected to multiple rotating seats (4) and is used to drive the multiple rotating seats (4) to rotate synchronously. The optical center recognition unit includes an recognition base (7) and an image acquisition module (8). The image acquisition module (8) is disposed in the recognition base (7) and is used to acquire optical center images.

2. The laser processing nozzle changing device according to claim 1, characterized in that, The receiving unit (3) includes a receiving seat, the receiving seat includes a mounting plate (9), the mounting plate (9) is fixedly connected to the mounting seat (1) by bolts, and the mounting plate (9) is provided with a through hole (10).

3. The laser processing nozzle changing device according to claim 2, characterized in that, The rotating seat (4) includes an outer tube (11) and an inner tube (12). The outer tube (11) extends into the through hole (10) and is rotatably connected to the through hole (10). The inner tube (12) is axially movably disposed inside the outer tube (11). The slot (5) is a groove circumferentially disposed on the inner side of the outer tube (11).

4. A laser processing nozzle changing device according to claim 3, characterized in that, An elastic element (13) is provided between the inner tube (12) and the outer tube (11).

5. A laser processing nozzle changing device according to claim 1, characterized in that, The drive mechanism (6) includes a motor (14), a drive gear (15), and multiple gear sets. Each rotating seat (4) is provided with a gear set. The gear set includes a small gear (16) and a large gear (17) that are coaxially and fixedly connected to the rotating seat (4). The small gear (16) and the large gear (17) in each gear set mesh with each other. The large gears (17) in adjacent gear sets mesh with each other. The drive gear (15) meshes with the large gear (17). The motor (14) is used to drive the drive gear (15) to rotate.

6. The laser processing nozzle changing device according to claim 1, characterized in that, The mounting base (1) is provided with a sealing plate (18) and a displacement mechanism (19). The displacement mechanism (19) is connected to the sealing plate (18) and is used to drive the sealing plate (18) to move back and forth, so as to adjust the sealing plate (18) to cover or move away from the installation position (2).

7. A laser processing nozzle changing device according to claim 1, characterized in that, The image acquisition module (8) includes an image unit (20), a light-transmitting protective window (21) and a filter unit (22) disposed in front of the image unit (20). The filter unit (22) is used to filter light outside the preset wavelength band, and the image unit (20) is used to acquire images of the light spot area.

8. A laser processing nozzle changing device according to claim 7, characterized in that, The image unit (20) includes a camera (23) and a lens (24) connected to each other.

9. A laser processing nozzle changing device according to claim 1, characterized in that, The identification base (7) is provided with a supplementary light module (25), which includes supplementary lights arranged around the image acquisition module (8). The supplementary lights are used to project illumination light onto the light spot area.

10. A laser processing nozzle changing device according to claim 1, characterized in that, The mounting base (1) is provided with a cleaning brush (26) for cleaning the nozzle.

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