Lens module and laser cutting head

Abstract

The application provides a lens module and a laser cutting head, and relates to the field of laser cutting. The lens module comprises a working lens module, a fixed support seat and a temperature field detection module; a temperature sensing surface of the temperature field detection module is arranged towards the working lens module, and the temperature field detection module is configured to monitor the temperature of the working lens. Based on the lens module provided by the application, the application further provides a laser cutting head, wherein the first protective lens module, the collimating lens module, the focusing lens module and the second protective lens module are sequentially arranged in the axial direction of the laser cutting head; and the second protective lens module is close to the nozzle of the laser cutting head. The lens module and the laser cutting head provided by the application can realize the monitoring and feedback of the lens temperature based on the reasonable arrangement of the temperature field detection module, thereby enhancing the safety and reliability of the product, improving the user experience, and assisting data analysis and optimization.

Description

Technical Field

[0001] This application relates to the field of laser cutting, and more specifically, to a lens module and a laser cutting head. Background Technology

[0002] Laser processing technology is an advanced manufacturing technology based on the principle of interaction between laser beams and materials. It achieves precision processing of various materials (including metals and non-metals) by precisely controlling a high-energy-density laser beam. This technology has multifunctional processing characteristics and can be widely used in fields such as material cutting, welding, surface modification, precision drilling, and micro / nano fabrication. It can also be used as a high-precision light source in processes such as object recognition and detection.

[0003] With the widespread application of laser processing technology in the industrial field, users are increasingly demanding higher levels of intelligence in their equipment. In actual production processes, the cleanliness of the laser head lens, as a key component affecting processing quality, directly relates to the stability and processing accuracy of the equipment.

[0004] However, due to factors such as insufficient cleanliness of the equipment's internal space and frequent operator turnover, the lenses pose a high risk of contamination. Once contaminants appear on the lens surface, it will lead to a decline in laser beam quality, severely affecting the normal operation of the equipment, making the laser processing process uncontrollable, increasing the defect rate, and impacting production efficiency and product consistency. Utility Model Content

[0005] In view of the above problems, the purpose of this application is to provide a lens module and a laser cutting head, which can monitor and provide feedback on the lens temperature based on the reasonable setting of the temperature field detection module, thereby enhancing the safety and reliability of the product, improving the user experience, and assisting in data analysis and optimization.

[0006] In a first aspect, embodiments of this application provide a lens module, which includes: a working lens module, a fixed support base, and a temperature field detection module; the temperature field detection module and the working lens module are respectively disposed on different radial planes of the fixed support base; the temperature sensing surface of the temperature field detection module is disposed facing the working lens module, and the temperature field detection module is configured to monitor the temperature of the working lens.

[0007] In the above implementation process, the lens module provided in this application embodiment is provided with a working lens module, a fixed support base, and a temperature field detection module. The radial planar layered arrangement avoids the temperature sensor from blocking the optical path of laser transmission, ensuring that the optical performance of the working lens module is not affected. Furthermore, the temperature sensing surface of the temperature field detection module faces the surface of the working lens, ensuring the sensitivity and accuracy of temperature field detection, and enabling timely capture of changes in lens temperature rise. The lens module provided in this application embodiment can realize real-time monitoring of the working lens, thereby ensuring the efficient operation of the working lens.

[0008] Optionally, in this embodiment, the central axis of the temperature field detection module intersects the central axis of the working lens at the surface center of the working lens.

[0009] In the above implementation process, the lens module provided in this application embodiment has a geometric relationship where the centers of the two axes intersect, which enables the temperature field detection module to accurately sense the peak temperature of the working hot zone of the lens and reduce the error of temperature field monitoring. When the detection range reaches the peak, the device can obtain the most complete thermal distribution data of the lens, providing a precise basis for thermal management. The lens module provided in this application can realize real-time monitoring of temperature changes in key areas of the lens without affecting optical path transmission, effectively preventing optical performance degradation caused by local overheating and greatly improving the stability and reliability of laser processing.

[0010] Optionally, in this embodiment, the fixed support includes a support base and a fixed base; the support base is connected to the fixed base; wherein, the support base is configured to support the fixed base, the working lens module and the temperature field detection module; the fixed base is configured to fix the working lens module and the temperature field detection module.

[0011] In the above implementation process, the fixed support base of the lens module provided by this application includes a support base and a fixed base. The support base ensures the overall rigidity and effectively suppresses processing vibration; the fixed base provides a precision installation reference to ensure the positional accuracy of the optical components. While ensuring structural stability, it improves the maintainability and adjustability of the system, making it particularly suitable for industrial laser processing scenarios that require frequent maintenance.

[0012] Optionally, in this embodiment, the working lens module includes a frame and a working lens; the fixing seat includes a rear wall perpendicular to the first direction, a first side wall and a second side wall perpendicular to the second direction and having a groove; the working lens is fixed to the frame; the groove is disposed on the first side wall and the second side wall along the first direction and configured to accommodate and engage the frame in the first direction; wherein the first direction and the second direction are perpendicular to each other in the radial plane.

[0013] In the above implementation process, the structural design of the lens module provided in this application embodiment realizes the rapid disassembly and precise positioning of the working lens module; the slide guide mechanism ensures that the lens frame moves linearly along the first direction, avoiding assembly offset; thereby significantly improving the lens replacement efficiency and position positioning accuracy, suitable for industrial application scenarios that require frequent lens replacement.

[0014] Optionally, in this embodiment, the lens module further includes a cover plate; the cover plate covers the lens frame on the opposite side of the rear wall and is fixed to the support or fixing seat with locking screws.

[0015] In the above implementation process, the cover plate design is fixed to the support or fixed base by locking screws, providing axial clamping force to the lens frame, ensuring the positional stability of the working lens during processing, and preventing external contaminants from entering the module, which significantly improves the long-term reliability of the lens module provided in the embodiments of this application in the industrial environment.

[0016] Optionally, in this embodiment, the temperature field detection module is disposed on the rear wall and fixed to the mounting base with fixing screws.

[0017] In the above implementation process, the temperature field detection module is integrated into the rear wall of the mounting base by fixing screws. This not only achieves stable alignment between the temperature sensing surface and the working lens, ensuring the accuracy of temperature field monitoring data, but also optimizes the spatial layout by installing it on the rear wall, avoiding interference with the optical path.

[0018] Optionally, in this embodiment, the temperature field detection module includes a temperature field sensor, which is oriented toward the working lens; wherein the temperature field sensor is configured to monitor the surface temperature of the working lens.

[0019] In the above implementation process, the temperature field detection module provided in this application embodiment monitors the surface temperature distribution of the working lens in real time through directionally arranged temperature field sensors, achieving precise control of the overall thermal state of the lens. The non-contact detection method of the temperature field sensor avoids interference with the laser transmission path, and its area array temperature measurement capability can simultaneously capture temperature changes in various areas of the lens surface, effectively identifying local overheating or abnormal temperature gradients, thus providing support for the thermal management of the working lens in the laser processing process.

[0020] In a first aspect, embodiments of this application provide a laser cutting head, which includes a first protective lens module, a second protective lens module, a collimating lens module, and a focusing lens module; the first protective lens module, the collimating lens module, the focusing lens module, and the second protective lens module are sequentially arranged in the axial direction on the laser cutting head; wherein, the second protective lens module is close to the nozzle of the laser cutting head.

[0021] Optionally, in this embodiment, the first protective lens module includes a first protective lens temperature field detection module, the collimating lens module includes a collimating lens temperature field detection module, the focusing lens module includes a focusing lens temperature field detection module, and the second protective lens module includes a second protective lens temperature field detection module; the laser cutting head includes a temperature measurement main control board, which is connected to the first protective lens temperature field detection module, the collimating lens temperature field detection module, the focusing lens temperature field detection module, and the second protective lens temperature field detection module.

[0022] In the above implementation process, the laser cutting head provided by this application integrates four lens modules with temperature field detection function through modular design, realizing intelligent thermal management of the entire laser optical path. The temperature field detection module equipped in each module can monitor the surface temperature distribution of the lens in real time, accurately identify local overheating or contamination abnormalities, thereby significantly improving the stability of high-power laser processing and the service life of optical components. At the same time, the modular structure design facilitates rapid maintenance.

[0023] Optionally, in this embodiment, the temperature measurement main control board includes a first protective lens temperature measuring plate, a collimating lens temperature measuring plate, a focusing lens temperature measuring plate, and a second protective lens temperature measuring plate; the temperature measurement main control board also includes a first protective lens alarm unit, a collimating lens alarm unit, a focusing lens alarm unit, and a second protective lens alarm unit; the first protective lens temperature measuring plate is connected to the first protective lens temperature field detection module and the first protective lens alarm unit; the collimating lens temperature measuring plate is connected to the collimating lens temperature field detection module and the collimating lens alarm unit; the focusing lens temperature measuring plate is connected to the focusing lens temperature field detection module and the focusing lens alarm unit; and the second protective lens temperature measuring plate is connected to the second protective lens temperature field detection module and the second protective lens alarm unit.

[0024] In the aforementioned implementation process, this application achieves intelligent monitoring of the entire optical path of the laser cutting head through a distributed temperature measurement main control board architecture. Each lens group (first protective lens, collimating lens, focusing lens, and second protective lens) is equipped with an independent temperature measurement board and alarm unit, forming a modular closed-loop monitoring system. The alarm unit enables operators to quickly locate abnormal lens groups, thereby reducing fault diagnosis time and significantly improving the reliability and maintenance efficiency of the high-power laser processing system.

[0025] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a first schematic diagram of the structure of the lens module provided in the embodiments of this application;

[0028] Figure 2 A schematic diagram showing the temperature field detection module setup provided in this application embodiment;

[0029] Figure 3 A schematic diagram showing the orientation of the temperature field detection module provided in real time in this application;

[0030] Figure 4 This is a second schematic diagram of the structure of the lens module provided in the embodiments of this application;

[0031] Figure 5 This is a third schematic diagram of the structure of the lens module provided in the embodiments of this application;

[0032] Figure 6 This is a schematic diagram of the structure of the laser cutting head provided in the embodiments of this application;

[0033] Figure 7 A schematic diagram of the temperature measurement main control board provided in real time for this application;

[0034] Reference numerals: First direction - y; Second direction - x; Lens module - 100; Working lens module - 110; Working lens - 111; Lens frame - 112; Fixed support - 120; Support - 121; Fixed base - 122; Rear wall - S1; Slide groove - H; First side wall - C1; Second side wall - C2; Temperature field detection module - 130; Cover plate - 140; Laser cutting head - 200; First protective lens module - 210; First protective lens temperature field detection module - 211; Collimating lens module - 220; Collimating lens temperature field Detection module-221; Focusing lens module-230; Focusing lens temperature field detection module-231; Second protective lens module-240; Second protective lens temperature field detection module-241; Temperature measurement main control board-250; First protective lens temperature measuring plate-2511; First protective lens alarm unit-2512; Collimating lens temperature measuring plate-2521; Collimating lens alarm unit-2522; Focusing lens temperature measuring plate-2531; Focusing lens alarm unit-2532; Second protective lens temperature measuring plate-2541; Second protective lens alarm unit-2542. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not 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 on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] Laser processing technology is an advanced manufacturing technology based on the principle of laser beam-material interaction. By precisely controlling a high-energy-density laser beam, it can achieve precision processing of various materials, including metals and non-metals. It is widely used in cutting, welding, surface modification, precision drilling, and micro / nano fabrication. It can also serve as a high-precision light source for object recognition and detection. With the increasing application of this technology in industry, users are demanding higher levels of intelligence from their equipment. In actual production, the laser head lens, as a core component affecting processing quality, directly determines the stability and accuracy of the equipment's operation.

[0042] However, during their research, the inventors discovered that the lenses were highly susceptible to contamination due to factors such as insufficient cleanliness within the equipment and frequent operator turnover. Once contaminants adhered to the lens surface, it led to laser beam energy attenuation and beam quality degradation, severely impacting not only the normal operation of the equipment but also causing the processing to become uncontrollable, significantly increasing the defect rate, and ultimately affecting production efficiency and product consistency. Therefore, ensuring lens cleanliness is crucial for guaranteeing the quality of laser processing.

[0043] Based on this, embodiments of this application provide a lens module and a laser cutting head. The lens module includes a working lens module, a fixed support base, and a temperature field detection module. Based on this lens module, embodiments of this application also provide a laser cutting head, which includes a first protective lens module, a second protective lens module, a collimating lens module, and a focusing lens module. Each lens module is equipped with a temperature field detection module to monitor and provide feedback on the lens temperature. This allows for intuitive and rapid response to problems encountered by the lenses inside the product during operation, making the laser processing process more controllable and less uncontrollable, thus helping to reduce the defect rate and improve the quality of laser processing.

[0044] Please refer to Figure 1 , Figure 1 This is a first schematic diagram of the structure of the lens module provided in the embodiment of this application; the embodiment of this application provides a lens module 100, which includes: a working lens module 110, a fixed support base 120 and a temperature field detection module 130.

[0045] like Figure 1 As shown, the temperature field detection module 130 and the working lens module 110 are respectively disposed on different radial planes of the fixed support base 120.

[0046] The temperature sensing surface of the temperature field detection module 130 is set facing the working lens module 110, and the temperature field detection module 130 is configured to monitor the temperature of the working lens 111.

[0047] The working lens module 110 and the temperature field detection module 130 are fixed by a fixed support 120, and are arranged on different radial planes to form a non-contact monitoring layout. The temperature sensing surface of the temperature field detection module 130 is oriented towards the working lens module 110. The axial misalignment design avoids interference from the temperature field detection module 130 to the optical path, while ensuring the accurate pointing of the temperature field detection module 130. That is, while ensuring the independence of the optical components, the function of temperature field monitoring is integrated.

[0048] The temperature field detection module 130 in this embodiment of the application realizes real-time monitoring of the surface temperature of the working lens 111 through a precise alignment structure.

[0049] As some examples, the heat generated by the lens causes the temperature to rise, including but not limited to the following reasons:

[0050] (1) When the surface cleanliness of the lens being tested is higher than 99%, but the lens itself has defects, the laser energy will be over-focused at the focal point, resulting in high temperature and thus causing the lens temperature to rise.

[0051] (2) When the surface cleanliness of the lens being tested is higher than 99%, but the ambient temperature of the laser head is too high, the temperature of the internal lens will rise.

[0052] (3) When the surface cleanliness of the lens being tested is higher than 99%, but the power setting of the laser is too high and the laser energy is too concentrated, the lens will also heat up due to the excessive energy, resulting in an increase in lens temperature.

[0053] (4) When the surface cleanliness of the tested lens is less than 99%, and the lens is not thoroughly cleaned: residual impurities on the lens surface will absorb laser energy and generate heat, causing the lens to heat up and the temperature to rise.

[0054] Therefore, for the monitoring of the surface temperature field of the lens, temperature field sensors collect the temperature of the surface of each lens, and temperature monitoring and feedback are essential for the operation of the lens assembly.

[0055] pass Figure 1 As can be seen, the lens module 100 provided in this application embodiment is provided with a working lens module 110, a fixed support base 120 and a temperature field detection module 130. The radial planar layered arrangement avoids the temperature sensor from blocking the optical path of laser transmission, ensuring that the optical performance of the working lens module 110 is not affected. Furthermore, the temperature sensing surface of the temperature field detection module 130 faces the surface of the working lens 111, ensuring the sensitivity and accuracy of temperature field detection, and can capture changes in lens temperature rise in a timely manner. The lens module 100 provided in this application embodiment can realize real-time monitoring of the working lens 111, thereby ensuring the efficient operation of the working lens 111.

[0056] Please refer to Figure 2 and Figure 3 , Figure 2 A schematic diagram showing the temperature field detection module setup provided in this application embodiment; Figure 3 This is a schematic diagram showing the orientation of the temperature field detection module provided in real time in this application; in an optional embodiment of this application, the central axis of the temperature field detection module 130 intersects the central axis of the working lens 111 at the surface center of the working lens 111.

[0057] Please refer to Figure 2 and Figure 3In this embodiment, the temperature field detection module 130 faces the working lens 111, and the central axis of the temperature field detection module 130 intersects the central axis of the working lens 111 at the center point of the surface of the working lens 111.

[0058] By precisely intersecting the central axis of the temperature field detection module 130 with the central axis of the working lens 111 at the center point of the lens surface, the detection area and the working hot zone are maximized to overlap. This ensures that the detection range of the temperature field detection module 130 exactly covers the area of ​​maximum heat load during lens operation. When the two axes intersect at the center of the lens surface, the effective monitoring range of the temperature field detection module 130 reaches its maximum value, enabling it to completely capture the temperature field distribution of the core working area of ​​the lens.

[0059] It should be noted that the temperature field detection module 130 can be installed in multiple locations. Figure 2 and Figure 3 The position shown is merely illustrative. In actual applications, the temperature field detection module 130 should be installed according to the requirement that the central axis of the temperature field detection module 130 intersects the central axis of the working lens 111 at the center of the surface of the working lens 111, so as to maximize the temperature field monitoring area on the surface of the working lens 111.

[0060] pass Figure 2 and Figure 3 As can be seen, the lens module 100 provided in this application embodiment has a geometric relationship where the centers of the two axes intersect, which enables the temperature field detection module 130 to accurately sense the peak temperature of the working hot zone of the lens and reduce the error of temperature field monitoring. When the detection range reaches the peak, the device can obtain the most complete thermal distribution data of the lens, providing a precise basis for thermal management. The lens module 100 provided in this application embodiment can realize real-time monitoring of temperature changes in key areas of the lens without affecting optical path transmission, effectively preventing optical performance degradation caused by local overheating and greatly improving the stability and reliability of laser processing.

[0061] Please refer to Figure 4 , Figure 4 This is a second schematic diagram of the structure of the lens module 100 provided in the embodiment of this application; in an optional embodiment of this application, the fixed support 120 includes a support 121 and a fixed base 122, and the support 121 is connected to the fixed base 122.

[0062] In the above implementation process, the support base 121 is configured to support the fixed base 122, the working lens module 110 and the temperature field detection module 130; the fixed base 122 is configured to fix the working lens module 110 and the temperature field detection module 130.

[0063] like Figure 4As shown, the fixed support base 120 of the lens module 100 provided in this embodiment consists of a support base 121 and a fixed base 122, which are mechanically connected to form a hierarchical support structure. The support base 121 serves as a basic load-bearing component, providing rigid support for the entire module; the fixed base 122 serves as a functional installation platform, integrating the positioning and fixing functions of the working lens module 110 and the temperature field detection module 130.

[0064] pass Figure 4 As can be seen, the fixed support 120 of the lens module 100 provided in this application includes a support 121 and a fixed support 122. The support 121 ensures overall rigidity and effectively suppresses processing vibration; the fixed support 122 provides a precision installation reference to ensure the positional accuracy of the optical components. While ensuring structural stability, it improves the maintainability and adjustability of the system, making it particularly suitable for industrial laser processing scenarios that require frequent maintenance.

[0065] Please continue reading. Figure 4 In an optional embodiment, the working lens module 110 includes a frame 112 and a working lens 111; the fixing base 122 includes a rear wall S1 perpendicular to the first direction (y), a first side wall C1 perpendicular to the second direction (x) and having a groove H, and a second side wall C2.

[0066] like Figure 4 As shown, the working lens 111 is fixed to the frame 112.

[0067] The slide groove H is disposed on the first sidewall C1 and the second sidewall C2 along the first direction (y), and is configured to accommodate and engage the lens frame 112 in the first direction (y). The lens frame 112 serves as the carrier of the working lens 111, and is precisely fitted with the fixed seat 122 through the slide groove H mechanism.

[0068] The first direction (y) and the second direction (x) are perpendicular to each other in the radial plane.

[0069] In the above implementation process, the fixed base 122 includes a rear wall S1 and two side walls with sliding grooves H (first side wall C1 and second side wall C2), wherein the sliding grooves H extend along the first direction (y) and form a perpendicular relationship in the radial plane with the second direction (x), and the mirror frame 112 achieves precise positioning by sliding the sliding grooves H in the first direction (y).

[0070] Therefore, the structural design of the lens module 100 provided in this application embodiment enables the rapid disassembly and precise positioning of the working lens module 110; the slide H guide mechanism ensures that the lens frame 112 moves linearly along the first direction (y) to avoid assembly offset; thereby significantly improving the lens replacement efficiency and the accuracy of position positioning, which is suitable for industrial application scenarios that require frequent lens replacement.

[0071] Please refer to Figure 5 , Figure 5 This is a third schematic diagram of the structure of the lens module 100 provided in an embodiment of this application; in an optional embodiment, the lens module 100 further includes a cover plate 140. Figure 5 As shown, the cover plate 140 covers the mirror frame 112 on the opposite side of the rear wall S1 and is fixed to the support base 121 or the fixing base 122 with locking screws.

[0072] pass Figure 5 As can be seen, the cover plate 140 is designed to be fixed to the support base 121 or the fixing base 122 by locking screws, providing axial clamping force for the lens frame 112, ensuring the positional stability of the working lens 111 during the processing, and preventing external contaminants from entering the module, which significantly improves the long-term reliability of the lens module 100 provided in the embodiments of this application in the industrial environment.

[0073] Please continue reading. Figure 1 In an optional embodiment, the temperature field detection module 130 is disposed on the rear wall S1 and fixed to the mounting base 122 with fixing screws. As an example, the temperature field detection module 130 is mounted on the rear wall S1 of the mounting base 122, with the temperature sensing surface of the temperature field monitoring module facing the working lens 111.

[0074] pass Figure 1 It can be seen that by integrating the temperature field detection module 130 into the rear wall S1 of the mounting base 122 with fixing screws, not only is the stable alignment of the temperature sensing surface and the working lens 111 achieved, ensuring the accuracy of the temperature field monitoring data, but the installation method of the rear wall S1 also optimizes the spatial layout and avoids interference with the optical path.

[0075] In an optional embodiment, the temperature field detection module 130 includes a temperature field sensor facing the working lens 111; wherein the temperature field sensor is configured to monitor the surface temperature of the working lens 111.

[0076] For example, the embodiments of this application use the MLX90640 32×24 infrared temperature field sensor as the core detection element to monitor the surface temperature distribution of the working lens 111 in real time in a non-contact manner. This temperature field sensor has the characteristics of low cost and small size, and the working temperature is -40℃~85℃.

[0077] Therefore, the temperature field detection module 130 provided in this embodiment monitors the surface temperature distribution of the working lens 111 in real time through directionally arranged temperature field sensors, achieving precise control over the thermal state of the entire lens. The non-contact detection method of the temperature field sensors avoids interference with the laser transmission path, and its area array temperature measurement capability can simultaneously capture temperature changes in various areas of the lens surface, effectively identifying local overheating or abnormal temperature gradients, thus providing support for the thermal management of the working lens 111 during laser processing.

[0078] Please refer to Figure 6 , Figure 6 This is a schematic diagram of the structure of the laser cutting head 200 provided in the embodiments of this application; this application provides a laser cutting head 200, as shown in the figure. Figure 6 As shown, the laser cutting head 200 includes a first protective lens module 210, a second protective lens module 240, a collimating lens module 220, and a focusing lens module 230.

[0079] The first protective lens module 210, the collimating lens module 220, the focusing lens module 230, and the second protective lens module 240 are sequentially arranged along the axial direction on the laser cutting head 200; wherein, the second protective lens module 240 is close to the nozzle of the laser cutting head 200.

[0080] It should be noted that the laser cutting head 200 provided in this application embodiment includes four sets of the above-mentioned lens modules, each of which includes a working lens module, a fixed support base and a temperature field detection module.

[0081] like Figure 6 As shown, the laser cutting head 200 provided in this application adopts a modular optical architecture, which integrates a first protective mirror module 210, a collimating mirror module 220, a focusing mirror module 230 and a second protective mirror module 240 in sequence along the axial direction to form a complete optical path transmission chain.

[0082] It should be noted that during laser processing, the first protective mirror acts as the first barrier for the laser entering the cutting head, primarily intercepting spatter and dust (especially condensed metal vapor particles); the collimating mirror is responsible for converting the divergent beam output by the laser into parallel light, while the focusing mirror focuses the parallel light into a high-energy-density spot; the second protective mirror is the mirror group closest to the processing area, mainly resisting molten slag backsplash and plasma radiation. The first protective mirror module 210, collimating mirror module 220, focusing mirror module 230, and second protective mirror module 240 can all perform temperature field detection on their respective working lenses, ensuring the smooth operation of every step of the laser processing optical path.

[0083] The first protective lens module 210 includes a first protective lens temperature field detection module 211; the collimating lens module 220 includes a collimating lens temperature field detection module 221; the focusing lens module 230 includes a focusing lens temperature field detection module 231; and the second protective lens module 240 includes a second protective lens temperature field detection module 241. Please refer to the following: Figure 7 , Figure 7 This is a schematic diagram of the temperature measurement main control board 250 provided in real time for this application; in this embodiment of the application, the laser cutting head 200 includes a temperature measurement main control board 250, which is connected to the first protective mirror temperature field detection module 211, the collimating mirror temperature field detection module 221, the focusing mirror temperature field detection module 231, and the second protective mirror temperature field detection module 241.

[0084] pass Figure 6 As can be seen, the laser cutting head 200 provided in this application integrates four lens modules 100 with temperature field detection function through modular design, realizing intelligent thermal management of the entire laser optical path. The temperature field detection module 130 equipped in each module can monitor the surface temperature distribution of the lens in real time, accurately identify local overheating or contamination abnormalities, thereby significantly improving the stability of high-power laser processing and the service life of optical components. At the same time, the modular structure design facilitates rapid maintenance.

[0085] Please continue reading. Figure 7 The temperature measurement main control board 250 includes a first protective mirror temperature measurement board 2511, a collimating mirror temperature measurement board 2521, a focusing mirror temperature measurement board 2531, and a second protective mirror temperature measurement board 2541; the temperature measurement main control board 250 also includes a first protective mirror alarm unit 2512, a collimating mirror alarm unit 2522, a focusing mirror alarm unit 2532, and a second protective mirror alarm unit 2542.

[0086] The first protective mirror temperature measuring plate 2511 is connected to the first protective mirror temperature field detection module 211 and the first protective mirror alarm unit 2512.

[0087] The collimating mirror temperature measuring plate 2521 is connected to the collimating mirror temperature field detection module 221 and the collimating mirror alarm unit 2522.

[0088] The focusing lens temperature measuring plate 2531 connects the focusing lens temperature field detection module 231 and the focusing lens alarm unit 2532.

[0089] The second protective mirror temperature measuring plate 2541 is connected to the second protective mirror temperature field detection module 241 and the second protective mirror alarm unit 2542.

[0090] Figure 7 As an example, the first protective mirror alarm unit 2512, the collimating mirror alarm unit 2522, the focusing mirror alarm unit 2532, and the second protective mirror alarm unit 2542 are configured as external light panels, which can control the color or flashing of the external light panels to achieve abnormal alarms.

[0091] For example, Figure 7 In the system, when indicator lights A, B, C, and D are all green, it indicates that the internal lenses of the laser head device are functioning normally. If any red light is on, it indicates a problem with the internal lenses, requiring timely maintenance. When the temperature of the first protective lens is abnormal and exceeds the threshold alarm, the external indicator light A will illuminate red; otherwise, it will illuminate green. When the temperature of the second protective lens is abnormal and exceeds the threshold alarm, the external indicator light B will illuminate red; otherwise, it will illuminate green. When the temperature of the collimating lens is abnormal and exceeds the threshold alarm, the external indicator light C will illuminate red; otherwise, it will illuminate green. When the temperature of the focusing lens is abnormal and exceeds the threshold alarm, the external indicator light D will illuminate red; otherwise, it will illuminate green.

[0092] During use, when the laser cutting head 200 is powered on, the temperature field detection module 130 starts working. At this time, the temperature field sensor detects the actual temperature of the lens body. After the laser device is powered on, the laser beam penetrates the lens body under the set parameters, and the temperature of the lens body will rise. The temperature field detection module 130 continues to work, and the temperature field sensor detects the actual working temperature of the lens body. When the temperature field detection module 130 alarms, it means that the actual temperature of the lens body under test has exceeded the set threshold temperature. The operator can determine which specific location of the lens temperature is abnormal by referring to the indicator lights on the external light panel.

[0093] Therefore, this application achieves intelligent monitoring of the entire optical path of the laser cutting head 200 through a distributed temperature measurement main control board 250 architecture. Each lens group (first protective lens, collimating lens, focusing lens, and second protective lens) is equipped with an independent temperature measurement board and alarm unit, forming a modular closed-loop monitoring system. The alarm unit enables operators to quickly locate abnormal lens groups, thereby reducing fault diagnosis time and significantly improving the reliability and maintenance efficiency of the high-power laser processing system.

[0094] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A lens module, characterized in that, The lens module includes: a working lens module, a fixed support base, and a temperature field detection module; The temperature field detection module and the working lens module are respectively disposed on different radial planes of the fixed support base; The temperature sensing surface of the temperature field detection module is positioned facing the working lens module, and the temperature field detection module is configured to monitor the temperature of the working lens.

2. The lens module according to claim 1, characterized in that, The central axis of the temperature field detection module intersects the central axis of the working lens at the surface center of the working lens.

3. The lens module according to claim 1, characterized in that, The fixed support base includes a support base and a fixed base; The support base is connected to the fixed base; The support base is configured to support the fixed base, the working lens module, and the temperature field detection module; the fixed base is configured to fix the working lens module and the temperature field detection module.

4. The lens module according to claim 3, characterized in that, The working lens module includes a frame and the working lens; the fixing base includes a rear wall perpendicular to the first direction, a first side wall perpendicular to the second direction and having a groove, and a second side wall. The working lens is fixed to the lens frame; The slide groove is disposed on the first sidewall and the second sidewall along the first direction, and is configured to accommodate and engage the mirror frame in the first direction; The first direction and the second direction are perpendicular to each other in the radial plane.

5. The lens module according to claim 4, characterized in that, The lens module also includes a cover plate; the cover plate is placed on the lens frame on the opposite side of the rear wall and fixed to the support or fixing seat with locking screws.

6. The lens module according to claim 4, characterized in that, The temperature field detection module is disposed on the rear wall and fixed to the mounting base with fixing screws.

7. The lens module according to claim 1, characterized in that, The temperature field detection module includes a temperature field sensor, which is oriented toward the working lens; wherein the temperature field sensor is configured to monitor the surface temperature of the working lens.

8. A laser cutting head, characterized in that, The laser cutting head includes a first protective lens module, a second protective lens module, a collimating lens module, and a focusing lens module; The first protective lens module, the collimating lens module, the focusing lens module, and the second protective lens module are sequentially arranged along the axial direction on the laser cutting head; wherein, the second protective lens module is close to the nozzle of the laser cutting head.

9. The laser cutting head according to claim 8, characterized in that, The first protective lens module includes a first protective lens temperature field detection module, the collimating lens module includes a collimating lens temperature field detection module, the focusing lens module includes a focusing lens temperature field detection module, and the second protective lens module includes a second protective lens temperature field detection module; The laser cutting head includes a temperature measurement main control board, which is connected to the first protective mirror temperature field detection module, the collimating mirror temperature field detection module, the focusing mirror temperature field detection module, and the second protective mirror temperature field detection module.

10. The laser cutting head according to claim 9, characterized in that, The temperature measurement main control board includes a first protective mirror temperature measurement board, a collimating mirror temperature measurement board, a focusing mirror temperature measurement board, and a second protective mirror temperature measurement board; the temperature measurement main control board also includes a first protective mirror alarm unit, a collimating mirror alarm unit, a focusing mirror alarm unit, and a second protective mirror alarm unit; The first protective mirror temperature measuring plate is connected to the first protective mirror temperature field detection module and the first protective mirror alarm unit; The collimating mirror temperature measuring plate is connected to the collimating mirror temperature field detection module and the collimating mirror alarm unit; The focusing lens temperature measuring plate is connected to the focusing lens temperature field detection module and the focusing lens alarm unit; The second protective mirror temperature measuring plate is connected to the second protective mirror temperature field detection module and the second protective mirror alarm unit.

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