A coaxial device for assisted adjustment of the cutting head nozzle's red light to ensure coaxiality with the nozzle.

Abstract

This utility model relates to a coaxial instrument device for assisting in adjusting the coaxiality of the red light from a cutting head nozzle with the nozzle itself. The device includes a coaxial instrument body, an optical imaging device, and a data interface. The optical imaging device is housed inside the coaxial instrument body, which is detachably fixed below the laser head nozzle. The data interface is located on the coaxial instrument body and connects to an external display terminal via a data cable. The optical imaging device communicates with the external display terminal through the data interface. This coaxial instrument device, through systematic optics, solves the problem of excessive red light brightness, allowing the end face and red light to be displayed simultaneously on the same screen in real time. The solution offers good compatibility with red light quality, enables rapid connection and immediate use, simplifies operation, improves reliability, and eliminates the need for separate charging, facilitating maintenance. Its specially designed lightweight structure ensures strong device compatibility and ease of use.

Description

Technical Field

[0001] This utility model relates to the field of laser processing technology, and in particular to the field of laser coaxial adjustment, specifically referring to a coaxial device for assisting in adjusting the red light of the cutting head nozzle to be coaxial with the nozzle. Background Technology

[0002] Currently, there are various laser coaxial adjustment solutions available on the market: 1. The cutting head has a built-in camera solution. An external camera is used to perform zero-position calibration of the red light of the cutting head, and the built-in lens is used to capture the nozzle circle to complete the online coaxiality correction.

[0003] 2. External camera solutions, such as Hongshan's wireless connection to the coaxial instrument and its use with a mobile phone screen for observation, or a certain company's wired connection to the coaxial instrument and its use with a machine tool screen for observation.

[0004] The existing technology has the following drawbacks: 1. Option 1 has insufficient compatibility and can only adjust the coaxiality of a small number of cutting head models with built-in cameras and built-in coaxial motors.

[0005] 2. The layout scheme 2 suffers from insufficient compatibility. Firstly, it lacks compatibility with machine tools: many machine tools, such as pipe cutting equipment, lack a placement platform, or the placement platform does not provide observation of the machine tool screen, requiring a separate screen for observation or the use of a small number of cutting heads with built-in coaxial motors for automatic adjustment. Secondly, it is incompatible with operators' habits: in actual production, when operators discover a decline in processing quality, they typically stop the machine, move the spindle to the cutting head, and use a tape-based trial-and-error method to adjust the coaxiality before restarting processing. However, the placement platform, which meets the placement requirements, is usually located outside the machine tool's soft limit, requiring the spindle to be moved and preventing in-situ adjustments, thus affecting processing efficiency.

[0006] 3. The optical scheme of Option 2 results in complex operation. Since the brightness of the red light is much higher than that of the end face, the optical scheme adopted in Option 2 cannot suppress the brightness of the red light in the image while ensuring the brightness of the end face. It is necessary to perform two imaging operations. That is, the end face must be photographed to find the center of the nozzle when the red light is off, and then the red light must be turned on to find the center of the red light. The operator needs to carry a coaxial device, an operating handle, and an Allen wrench for adjusting the cutting head.

[0007] 4. Option 2 is prone to safety hazards. Many machine tools do not have the function of switching the red light on and off independently. They can only turn off the red light by opening the optical shutter. The optical shutter is the last safety guarantee before the high-energy laser is emitted. Opening the optical shutter at an unsafe distance poses a safety hazard.

[0008] 5. The placement offset of Scheme 2 causes instability in accuracy. External placement makes it difficult to ensure the coaxiality of the camera and the cutting head. The placement offset will cause the imaging point after the red light is refracted through the lens to be unstable, affecting the debugging results.

[0009] 6. Option 2 has high hardware costs. While the Hongshan solution connects to a mobile phone, it could have used a wired connection for reverse power supply and data transmission via the phone, but instead opted for a built-in power module and wireless module. Another company's solution connects to an industrial control computer, typically requiring cables longer than 10 meters. If the machine tool's screen is inconvenient to view during manual adjustments, a mobile phone connection is still necessary.

[0010] Under current technology, adjusting the centering of the red light requires switching the red light source on and off. Some devices cannot control the red light switch independently, and turning off the red light requires opening the laser shutter, which poses a safety hazard.

[0011] Existing solutions lack reliable and simple physical constraints to ensure coaxiality between the camera optical axis and the nozzle, resulting in numerous limitations in their use.

[0012] Existing solutions rely on microprocessors and wireless transmission modules for display, which are too costly and require separate charging, making them inconvenient to use and maintain.

[0013] Existing solutions do not directly display red light. When the quality of the red light is poor or its shape is irregular, the positioning effect of the algorithm is difficult to guarantee, which can easily introduce systematic errors. Utility Model Content

[0014] The purpose of this invention is to overcome the shortcomings of the prior art and provide a coaxiality device that enables the auxiliary adjustment of the red light of the cutting head nozzle to be coaxial with the nozzle, which is highly compatible, easy to operate, and has a wide range of applications.

[0015] To achieve the above objectives, the coaxiality device of this utility model, which assists in adjusting the red light of the cutting head nozzle to be coaxial with the nozzle, is as follows: This coaxiality device, which assists in adjusting the red light from the cutting head nozzle to be coaxial with the nozzle, is characterized by the following features: the system includes a coaxiality body, an optical imaging device, and a data interface; the optical imaging device is located inside the coaxiality body; the coaxiality body is detachably fixed below the laser head nozzle; the data interface is located on the coaxiality body and is connected to an external display terminal via a data cable; and the optical imaging device communicates with the external display terminal through the data interface.

[0016] Preferably, the coaxial instrument body includes a housing and a nozzle positioning plate. The nozzle positioning plate is disposed on the housing and inserted into the gap between the laser cutting head and the laser head nozzle to achieve coarse alignment and mechanical fixation of the optical axis of the optical imaging device with the laser light output path.

[0017] Preferably, the housing includes a coaxial instrument upper pressure plate, a coaxial instrument bottom cover, a coaxial instrument outer shell, and a coaxial instrument lens protective cover. The coaxial instrument upper pressure plate is installed on the upper part of the coaxial instrument outer shell, the coaxial instrument bottom cover is installed on the bottom of the coaxial instrument outer shell, and the coaxial instrument lens protective cover is located above the optical imaging device.

[0018] Preferably, the coaxial instrument body also includes at least one pad, which is detachably disposed between the coaxial instrument body and the laser cutting head.

[0019] Preferably, the nozzle positioning plate is provided with a waist-shaped hole, and the nozzle positioning plate is made of spring steel.

[0020] Preferably, the optical imaging device includes a UVC camera, an M12 lens, an infrared light source, and a filter. The M12 lens is mounted on the UVC camera, the infrared light source is located inside the coaxial instrument body and illuminates the end face of the laser head nozzle, and the filter is located in front of the M12 lens.

[0021] Preferably, the infrared light source provides an emission wavelength of 850 nm.

[0022] Preferably, the data interface is a Type-C female connector, which connects to the mobile phone via an OTG data cable to provide reverse power to the UVC camera and infrared light source of the optical imaging device.

[0023] This invention employs a coaxiality device to assist in adjusting the red light from the cutting head nozzle to be coaxial with the nozzle itself. Through systematic optics, it solves the problem of excessive red light brightness, allowing the end face and red light to be displayed simultaneously on the same screen in real time. The solution exhibits good compatibility with red light quality; it is compatible with the processing performance of entry-level mobile phones, and the UVC protocol camera fully utilizes the reverse power supply capability of the phone's Type-C port for quick connection and immediate use, simplifying operation and improving reliability. Maintenance is convenient as no separate charging is required. The specially designed lightweight structure ensures optical path coaxiality through physical limiting; it can be fixed simply by inserting it into the gap between the nozzle and the ceramic ring. The device boasts strong compatibility and ease of use. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the appearance of the coaxial device that assists in adjusting the red light of the cutting head nozzle to be coaxial with the nozzle, in order to realize this utility model.

[0025] Figure 2 This is a schematic diagram of the coaxiality device that helps adjust the red light of the cutting head nozzle to be coaxial with the nozzle, in order to realize this utility model.

[0026] Figure 3This is a schematic diagram of the pad block of the coaxial device for assisting in adjusting the red light of the cutting head nozzle to be coaxial with the nozzle, which is the implementation of this utility model.

[0027] Figure label: 1 Coaxial instrument body 2 Type-C female connectors 3 Laser cutting head 6. Laser head nozzle 4. Coaxial instrument upper pressure plate 5. Coaxial instrument lens protective cover 7. Coaxial Instrument Bottom Cover 8. Coaxial Instrument Housing 9. Nozzle positioning thin plate 10 spacers Detailed Implementation

[0028] To more clearly describe the technical content of this utility model, the following description is provided in conjunction with specific embodiments.

[0029] This utility model discloses a coaxial device for assisting in adjusting the red light of the cutting head nozzle to be coaxial with the nozzle. It includes a coaxial device body 1, an optical imaging device, and a data interface. The optical imaging device is disposed inside the coaxial device body 1. The coaxial device body 1 is detachably fixed below the laser head nozzle 6. The data interface is disposed on the coaxial device body 1 and is connected to an external display terminal via a data cable. The optical imaging device communicates with the external display terminal through the data interface.

[0030] In a preferred embodiment of the present invention, the coaxial instrument body 1 includes a housing and a nozzle positioning plate 9. The nozzle positioning plate 9 is disposed on the housing and is inserted into the gap between the laser cutting head 3 and the laser head nozzle 6 to achieve coarse alignment and mechanical fixation of the optical axis of the optical imaging device with the laser light output path.

[0031] In a preferred embodiment of the present invention, the housing includes a coaxial instrument upper pressure plate 4, a coaxial instrument bottom cover 7, a coaxial instrument outer shell 8, and a coaxial instrument lens protective cover 5. The coaxial instrument upper pressure plate 4 is installed on the upper part of the coaxial instrument outer shell 8, the coaxial instrument bottom cover 7 is installed on the bottom of the coaxial instrument outer shell 8, and the coaxial instrument lens protective cover 5 is located above the optical imaging device.

[0032] In a preferred embodiment of the present invention, the coaxial instrument body 1 further includes at least one pad 10, which is detachably disposed between the coaxial instrument body 1 and the laser cutting head 3.

[0033] In a preferred embodiment of the present invention, the nozzle positioning plate 9 is provided with a waist-shaped hole, and the nozzle positioning plate 9 is made of spring steel.

[0034] In a preferred embodiment of the present invention, the optical imaging device includes a UVC camera, an M12 lens, an infrared light source, and a filter. The M12 lens is mounted on the UVC camera, the infrared light source is disposed inside the coaxial instrument body 1 and illuminates the end face of the laser head nozzle 6, and the filter is disposed in front of the M12 lens.

[0035] In a preferred embodiment of the present invention, the infrared light source provides an emission wavelength of 850nm.

[0036] In a preferred embodiment of this utility model, the data interface is a Type-C female connector 2, which connects to the mobile phone via an OTG data cable and provides reverse power to the UVC camera and infrared light source of the optical imaging device.

[0037] This utility model relates to the field of laser processing technology, and provides a clamping device and an optical imaging device for adjusting the red light of the cutting head nozzle to be coaxial with the nozzle, which is suitable for laser processing scenarios where laser coaxiality needs to be adjusted to ensure processing quality.

[0038] Figure 1 As shown, part 1 is the coaxial instrument body, and part 2 is the Type-C female connector. Figure 2 As shown, part 3 is the laser cutting head, part 6 is the laser head nozzle, part 4 is the coaxial instrument upper pressure plate, part 5 is the coaxial instrument lens protective cover, part 7 is the coaxial instrument bottom cover, part 8 is the coaxial instrument housing, and part 9 is the nozzle clamping plate. Figure 3 As shown, part 10 is a pad.

[0039] The usage method is as follows: Insert the nozzle positioning plate 9 into the gap between the laser cutting head 3 and the laser head nozzle 6. This mechanism is a limiting and centering mechanism to ensure that the camera axis is coaxial with the laser head's light output line (meeting the accuracy range requirements). By adjusting this gap, the nozzle positioning plate 9 can be clamped, and the coaxial instrument body 1 can be stably fixed below the laser cutting head 3. Take out an OTG data cable, insert one end of the data cable into the Type-C female connector 2, and connect the other end of the data cable to a mobile phone or other display terminal. At this time, the mobile phone or other display terminal will automatically open the pre-installed software, observe the nozzle end face through the coaxial instrument's built-in camera, and adjust the coaxiality of the cutting head nozzle red light and the nozzle opening through the real-time screen of the mobile phone or other display terminal to achieve the best processing effect.

[0040] Meanwhile, for laser head nozzles of different heights, the problem of ensuring that the end face of the nozzles of different heights is within the camera's imaging range can be solved by adding a pad 10.

[0041] In a specific embodiment of this utility model, the device consists of a UVC camera, an M12 lens, a custom OTG data cable, infrared illumination, a custom filter, a mobile app, and custom tooling.

[0042] The 2-megapixel UVC camera, paired with an 8mm M12 lens, connects to the phone via a custom OTG cable, supporting reverse power supply and data transfer from the phone. This avoids integrating power and wireless communication modules into the device, reducing hardware costs. It also minimizes unnecessary electronic components, resulting in high reliability.

[0043] The 850nm infrared light source has higher brightness and can achieve higher end-face illuminance under the same power conditions.

[0044] A custom filter suppresses the brightness of the red light from the cutting head without affecting the transmission of 850nm infrared light reflected from the end face. This reduces the brightness contrast between the infrared light and the end face, supports real-time display of the red light and the end face during coaxial debugging, and avoids visual algorithm incompatibility issues when the red light shape is poor.

[0045] The mobile app supports automatic recognition of camera connection status. When the camera is connected, it automatically turns on the red light to adjust the screen, making it plug-and-play and improving the ease of use and efficiency of the product.

[0046] The custom-made tooling features a high-precision machined ultra-thin spring steel insert plate, with a thickness compatible with various cooling water rings and other special tooling. It utilizes the inherent assembly clearance between the nozzle and the cutting head to achieve equipment installation and self-centering. The custom-made spring steel insert plate boasts high strength, is less prone to plastic deformation during continuous insertion and removal, and offers higher reliability. Simultaneously, the high-precision machined open-waisted hole design effectively reduces assembly errors during insertion, minimizes camera eccentricity, and ensures accurate red light adjustment.

[0047] For the specific implementation scheme of this embodiment, please refer to the relevant descriptions in the above embodiments, which will not be repeated here.

[0048] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0049] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means at least two.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] This invention employs a coaxiality device to assist in adjusting the red light from the cutting head nozzle to be coaxial with the nozzle itself. Through systematic optics, it solves the problem of excessive red light brightness, allowing the end face and red light to be displayed simultaneously on the same screen in real time. The solution exhibits good compatibility with red light quality; it is compatible with the processing performance of entry-level mobile phones, and the UVC protocol camera fully utilizes the reverse power supply capability of the phone's Type-C port for quick connection and immediate use, simplifying operation and improving reliability. Maintenance is convenient as no separate charging is required. The specially designed lightweight structure ensures optical path coaxiality through physical limiting; it can be fixed simply by inserting it into the gap between the nozzle and the ceramic ring. The device boasts strong compatibility and ease of use.

[0052] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, the specification and drawings should be considered illustrative rather than restrictive.

Claims

1. A coaxiality device for assisting in adjusting the red light of a cutting head nozzle to be coaxial with the nozzle, characterized in that, The device includes a coaxial instrument body, an optical imaging device, and a data interface. The optical imaging device is located inside the coaxial instrument body, which is detachably fixed below the laser head nozzle. The data interface is located on the coaxial instrument body and is connected to an external display terminal via a data cable. The optical imaging device communicates with the external display terminal through the data interface.

2. The coaxiality device for assisting in adjusting the red light of the cutting head nozzle to be coaxial with the nozzle, as described in claim 1, is characterized in that... The coaxial instrument body includes a housing and a nozzle positioning plate. The nozzle positioning plate is disposed on the housing and is inserted into the gap between the laser cutting head and the laser head nozzle to achieve coarse alignment and mechanical fixation of the optical axis of the optical imaging device with the laser light output path.

3. The coaxiality device for assisting in adjusting the red light of the cutting head nozzle to be coaxial with the nozzle, as described in claim 2, is characterized in that... The housing includes a coaxial instrument upper pressure plate, a coaxial instrument bottom cover, a coaxial instrument outer shell, and a coaxial instrument lens protective cover. The coaxial instrument upper pressure plate is installed on the upper part of the coaxial instrument outer shell, the coaxial instrument bottom cover is installed on the bottom of the coaxial instrument outer shell, and the coaxial instrument lens protective cover is located above the optical imaging device.

4. The coaxiality device for assisting in adjusting the red light of the cutting head nozzle to be coaxial with the nozzle, as described in claim 1, is characterized in that... The coaxial instrument body also includes at least one pad, which is detachably disposed between the coaxial instrument body and the laser cutting head.

5. The coaxiality device for assisting in adjusting the red light of the cutting head nozzle to be coaxial with the nozzle, as described in claim 2, is characterized in that... The nozzle positioning plate is provided with a waist-shaped hole, and the nozzle positioning plate is made of spring steel.

6. The coaxiality device for assisting in adjusting the red light of the cutting head nozzle to be coaxial with the nozzle, as described in claim 1, is characterized in that... The optical imaging device includes a UVC camera, an M12 lens, an infrared light source, and a filter. The M12 lens is mounted on the UVC camera, the infrared light source is located inside the coaxial instrument body and illuminates the end face of the laser head nozzle, and the filter is located in front of the M12 lens.

7. The coaxiality device for assisting in adjusting the red light of the cutting head nozzle to be coaxial with the nozzle, as described in claim 6, is characterized in that... The infrared light source provides an emission wavelength of 850nm.

8. The coaxiality device for assisting in adjusting the red light of the cutting head nozzle to be coaxial with the nozzle, as described in claim 1, is characterized in that... The data interface is a Type-C female connector, which connects to the mobile phone via an OTG data cable and provides reverse power to the UVC camera and infrared light source of the optical imaging device.

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