High-power industrial femtosecond laser water cooling structure

Abstract

This application relates to the field of femtosecond laser technology and discloses a water-cooling structure for a high-power industrial femtosecond laser. It includes a set screw, a housing water-cooling plate, a standard water-cooling connector, a flow channel cover, a light guide side plate, a reflector mount, a light guide lens, an ED plug, and a sealing ring. The housing water-cooling plate has cooling channels inside. The flow channel cover, ED plug, and set screw seal the cooling channels. The housing water-cooling plate and the flow channel cover are connected by screws, and the flow channel cover has a sealing groove. The ED plug is threaded into the housing water-cooling plate and has a sealing gasket. The set screw is threaded into the housing water-cooling plate. A reflector mount is mounted on the housing water-cooling plate, and a light guide lens is mounted on the reflector mount. A light guide side plate is mounted on the side wall of the housing water-cooling plate, and the housing water-cooling plate and the light guide side plate are connected by screws. The light guide side plate has a light guide lens and a sealing ring. A standard water-cooling connector is threaded to one side of the housing water-cooling plate.

Description

Technical Field

[0001] This application relates to the field of femtosecond laser technology, and in particular to a water-cooling structure for a high-power industrial femtosecond laser. Background Technology

[0002] In the field of high-power femtosecond lasers, internal thermal management is crucial for equipment stability and lifespan. Traditional water-cooling solutions for high-power femtosecond lasers employ a separate design for the internal laser cooling structure and the water-cooling method for the waste light absorption device (commonly known as the "garbage can"). These two components are independently installed and connected via multiple parts. This separate structure has significant drawbacks: firstly, the waste can, as an independent component, occupies a large amount of space inside the laser, resulting in a bulky overall structure and hindering miniaturization and integrated design; secondly, the separate structure relies on numerous components (such as independent water pipes, connectors, and seals) for connection, increasing processing costs and assembly complexity, and reducing the consistency and reliability of mass production. Furthermore, the separate water-cooling system has low heat transfer efficiency, making it difficult to achieve overall temperature uniformity control of the laser, resulting in significant susceptibility to external temperature fluctuations and insufficient stability.

[0003] In the existing technology, improvements to the water-cooling structure of lasers are mostly focused on heat dissipation optimization of individual components (such as increasing the flow channel area and improving the sealing structure), but there is no solution that integrates the internal water channels of the laser with the water channels of the trash can through integrated design, reduces independent components and improves the overall integration.

[0004] Therefore, how to design an integrated water-cooling structure that reduces internal space occupation while improving heat dissipation efficiency and production economy has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] This application provides a water-cooling structure for a high-power industrial femtosecond laser, aiming to address the problem that in the prior art, improvements to laser water-cooling structures are mostly focused on optimizing the heat dissipation of single components (such as increasing the flow channel area and improving the sealing structure), but there is no solution that integrates the internal water channels of the laser with the water channels of the trash can through integrated design, reduces independent components, and improves the overall integration.

[0006] In a first aspect, embodiments of this application provide a water-cooled structure for a high-power industrial femtosecond laser, including a set screw, a housing water-cooling plate, a standard water-cooling connector, a flow channel cover, a light guide side plate, a reflector mount, a light guide lens, an ED plug, and a sealing ring.

[0007] The housing water-cooling plate has a cooling water channel inside. The channel cover, ED plug and set screw are used to seal the cooling water channel. The housing water-cooling plate and the channel cover are connected by screws. The channel cover is provided with a sealing groove.

[0008] The ED plug is threaded into the water-cooling plate of the housing, and a sealing gasket is installed on the ED plug; the set screw is threaded into the water-cooling plate of the housing.

[0009] A reflector mount is provided on the water-cooled plate of the casing, and a light guide lens is provided on the reflector mount;

[0010] A light guide plate is installed on the side wall of the housing water-cooling plate. The housing water-cooling plate and the light guide plate are connected by screws. The light guide plate is provided with a light guide lens and a sealing ring. A standard water-cooling connector is threaded to one side of the housing water-cooling plate.

[0011] In some embodiments, the housing water-cooling plate and the reflector mount, and the reflector mount and the light guide lens are bonded and fixed by UV adhesive.

[0012] In some embodiments, the interior or surface of the housing water-cooling plate is provided with heat dissipation grooves, which are used to increase the light spot reflection area to improve heat dissipation efficiency.

[0013] In some embodiments, the light guide lens is used to reflect the garbage light into the heat dissipation groove of the water-cooled plate of the housing, thereby achieving heat dissipation and absorption of the garbage light through the heat dissipation groove.

[0014] In some embodiments, the tilt angle of the heat dissipation groove matches the reflection angle of the light guide lens to ensure that the garbage light is accurately reflected into the heat dissipation groove.

[0015] In some embodiments, a lens mounting V-groove is provided on the light guide side plate, and the light guide lens is positioned and installed through the lens mounting V-groove and fixed with UV adhesive.

[0016] In some embodiments, the sidewall water channels of the housing water-cooling plate are connected to the internal cooling water channels to form an integrated water-cooling circulation path.

[0017] In some embodiments, a sealing ring is provided in the sealing groove of the flow channel cover plate, and the sealing ring is used to seal the connection interface between the housing water cooling plate and the flow channel cover plate.

[0018] In some embodiments, a sealing ring is provided in the sealing groove of the light guide side plate, and the sealing ring is used to seal the connection interface between the housing water cooling plate and the light guide side plate.

[0019] In some embodiments, the sealing gasket on the ED plug is an annular structure, and the sealing gasket is embedded in the threaded interface between the ED plug and the water-cooling plate of the housing to achieve a seal.

[0020] This invention integrates the internal water channels of the laser with those of the waste bin through a unified water channel design on the housing water-cooling plate. This eliminates the space occupied by the separate waste bin, reduces the number of accessories (such as independent water pipes and connectors), significantly lowers processing costs and assembly complexity, and facilitates the miniaturized integrated design and mass production of the laser. The water channels on the side wall of the housing water-cooling plate are connected to the internal water channels, forming an integrated water-cooling circulation path. The side-plate water-cooling design of the light guide plate improves the overall heat conduction efficiency of the laser, enhances its resistance to external temperature interference, and significantly improves the temperature uniformity of the housing water-cooling plate. The light from the waste bin is reflected into the heat dissipation grooves of the housing water-cooling plate through a light guide lens. These grooves increase the light spot reflection and absorption area, achieving efficient absorption and conduction of heat from the waste bin light, further improving heat dissipation efficiency.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the water-cooling structure of a high-power industrial femtosecond laser provided in one embodiment of this application;

[0024] Figure 2 for Figure 1 Corresponding side sectional view;

[0025] Figure 3 for Figure 2 Corresponding magnified view;

[0026] Figure 4 for Figure 1 The corresponding front sectional view;

[0027] Figure 5 for Figure 4 Corresponding magnified view;

[0028] Figure 6 An exploded perspective view of a light guide side plate provided in an embodiment of this application;

[0029] Figure 7 An exploded perspective view of a flow channel cover provided in an embodiment of this application;

[0030] Figure 8 This is a schematic diagram of the structure of a reflector mount provided in an embodiment of this application.

[0031] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Detailed Implementation

[0032] 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, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.

[0034] It should be understood that, in order to clearly describe the technical solutions of the embodiments of this utility model, the terms "first" and "second" are used in the embodiments of this utility model to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0035] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0036] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0037] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0038] In the field of high-power femtosecond lasers, internal thermal management is crucial for equipment stability and lifespan. Traditional water-cooling solutions for high-power femtosecond lasers employ a separate design for the internal laser cooling structure and the water-cooling method for the waste light absorption device (commonly known as the "garbage can"). These two components are independently installed and connected via multiple parts. This separate structure has significant drawbacks: firstly, the waste can, as an independent component, occupies a large amount of space inside the laser, resulting in a bulky overall structure and hindering miniaturization and integrated design; secondly, the separate structure relies on numerous components (such as independent water pipes, connectors, and seals) for connection, increasing processing costs and assembly complexity, and reducing the consistency and reliability of mass production. Furthermore, the separate water-cooling system has low heat transfer efficiency, making it difficult to achieve overall temperature uniformity control of the laser, resulting in significant susceptibility to external temperature fluctuations and insufficient stability.

[0039] In the existing technology, improvements to the water-cooling structure of lasers are mostly focused on heat dissipation optimization of individual components (such as increasing the flow channel area and improving the sealing structure), but there is no solution that integrates the internal water channels of the laser with the water channels of the trash can through integrated design, reduces independent components and improves the overall integration.

[0040] Therefore, how to design an integrated water-cooling structure that reduces internal space occupation while improving heat dissipation efficiency and production economy has become a technical problem that urgently needs to be solved in this field.

[0041] Please refer to Figures 1-8 This application provides a water-cooling structure for a high-power industrial femtosecond laser, including a set screw 1, a housing water-cooling plate 2, a standard water-cooling connector 3, a flow channel cover 4, a light guide side plate 5, a reflector mount 6, a light guide lens 7, an ED plug 8, a sealing ring 502, and a reflector 503 (for light reflection). The housing water-cooling plate has cooling channels inside, and the flow channel cover, ED plug, and set screw are used to seal the cooling channels. The housing water-cooling plate and the flow channel cover are connected by screws. The flow channel cover is provided with a sealing groove; the ED plug is threadedly engaged with the water-cooling plate of the housing, and a sealing gasket is installed on the ED plug; the set screw is threadedly engaged with the water-cooling plate of the housing; a reflector mount is provided on the water-cooling plate of the housing, and a light guide lens is provided on the reflector mount; a light guide side plate is installed on the side wall of the water-cooling plate of the housing, and the water-cooling plate of the housing and the light guide side plate are connected by screws, and the light guide side plate is provided with a light guide lens and a sealing ring; a standard water-cooling connector is threadedly connected to one side of the water-cooling plate of the housing.

[0042] Specifically, addressing the issues of large space occupation, complex assembly, and low heat dissipation efficiency of traditional split water-cooling structures, this solution deeply integrates the core optical path components inside the laser (such as reflector mounts and light guide systems) with the water-cooling channel through integrated design, achieving an integrated design of water system, structural support, and optical path integration.

[0043] The housing water-cooled plate (core integrated component) serves as the core load-bearing and heat dissipation component inside the laser. It has an integrated cooling water channel inside and a direct external mounting interface for the reflector mount and light guide side plate, replacing the independent laser water-cooling block and trash can water-cooling device in the traditional split structure.

[0044] The cooling water channel adopts an optimized design (such as spiral, serpentine or multi-branch channel) through the internal flow channel, which can simultaneously cover the heat dissipation needs of the laser gain medium, pump module and garbage light absorption area (implying integrated garbage can function), to achieve integrated heat dissipation of "one machine, two cooling".

[0045] The mounting interface is directly machined onto the surface of the water-cooled plate of the housing via a reflector mount. This is used to fix the light guide lens, making the optical path system rigidly connected to the water-cooled structure, reducing independent support components and compressing internal space.

[0046] The flow channel cover is fastened to the water-cooling plate of the casing with screws. The cover has a sealing groove and an internal sealing ring (such as an O-ring) to seal the end face of the cooling water channel and prevent water leakage.

[0047] The ED plug is threaded into the water-cooling plate of the housing and is used to seal the end of the cooling water channel. The plug has a built-in sealing gasket (such as a rubber gasket) and achieves a seal through the thread pre-tightening force, replacing multiple independent joints in the traditional split structure.

[0048] Set screws are used to fix auxiliary components (such as the positioning of light guide side plates). They achieve high-precision positioning and fastening through threaded engagement, reducing redundant parts.

[0049] The light guide side plate is connected to the side wall of the water-cooled plate of the housing by screws. The side plate integrates the light guide lens mounting position and sealing ring to form a closed light guide path. At the same time, the heat dissipation capacity of the housing water-cooled plate is used to reduce the temperature rise of the light guide component.

[0050] The reflector mount and the light guide lens are directly used as the protruding structure of the water-cooling plate of the housing through the reflector mount. The light guide lens is fixed on the mount, so that the optical path adjustment and the water-cooling structure are assembled synchronously, avoiding the independent installation error of the optical path components and the water-cooling block in the traditional split type.

[0051] The standard water-cooling connector is threaded to one side of the water-cooling plate of the housing, serving as a unified inlet and outlet for the cooling medium (such as water or antifreeze), replacing the separate water nozzles for the laser and the trash can in the traditional solution, and simplifying the external piping connection.

[0052] By placing a sealing ring on the pre-set flow channel groove of the water-cooling plate of the casing, covering the flow channel cover plate, and tightening it evenly with screws, the water channel is sealed by the geometric constraint of the sealing groove and the elastic deformation of the sealing ring. The end of the cooling water channel is screwed in through the thread of the ED plug, and the sealing gasket adheres to the end face of the water-cooling plate of the casing under the thread preload, sealing the flow channel and forming a complete closed-loop water circuit.

[0053] The reflector mount is an integral structure of the water-cooling plate of the housing. The light guide lens is directly installed on the mount, and the light path is calibrated by adjusting the lens angle. The light guide side plate is fixed to the side wall of the water-cooling plate with screws. The light guide lens on the side plate and the lens of the mount form the light transmission path. The sealing ring between the side plate and the water-cooling plate prevents external dust or moisture from entering.

[0054] An external water chiller injects a low-temperature medium into the cooling channels of the laser housing's water-cooling plate via a standard water-cooling connector. This medium flows through the core heat-generating areas of the laser (such as the pump module and gain medium) and the waste light absorption areas (absorption structures integrated within the water-cooling plate). The high thermal conductivity of the metal water-cooling plate rapidly removes heat, achieving concentrated heat dissipation from the laser's internal heat sources. Optimized flow channel design (such as increasing turbulence and reducing flow resistance) improves heat exchange efficiency, while the integrated structure shortens the heat conduction path, reduces the overall temperature difference of the laser, and improves temperature uniformity.

[0055] In traditional solutions, the separate water-cooling device for the trash can is integrated into the water-cooling plate inside the housing (e.g., by setting a trash light-absorbing coating or structure next to the flow channel), eliminating its independent space occupation and making the internal structure of the laser more compact. This reduces the number of independent water pipes, joints, and seals, and lowers processing costs and improves consistency in mass production through standardized threaded interfaces (such as G1 / 4, M12, etc.) and modular assembly.

[0056] By merging the laser and the water path in the bin, separate components are eliminated, reducing space requirements and adapting to the needs of miniaturized equipment. The simplified sealing structure (reduced joints) lowers the risk of leakage; the integrated rigid connection improves optical path stability, avoiding optical path deviation caused by vibration in traditional separate designs. The unified flow channel design enables uniform temperature control, improves thermal response speed, reduces the equipment's sensitivity to external temperature fluctuations, and significantly improves stability. The reduced number of parts and assembly steps lowers processing costs and shortens assembly time, making it suitable for mass production.

[0057] The provided structure is suitable for high-power industrial femtosecond lasers (such as pulse power above 100W), especially for scenarios with compact size and high stability requirements (such as precision machining and micro-nano manufacturing equipment). It solves the core pain points of traditional solutions through an integrated water-cooling structure, promoting the miniaturization and high reliability design of lasers.

[0058] In some embodiments, the housing water-cooling plate and the reflector mount, and the reflector mount and the light guide lens are bonded and fixed by UV adhesive.

[0059] The housing water-cooling plate, reflector mount and light guide lens are bonded and fixed with UV adhesive, replacing the traditional mechanical fastening method, to achieve lightweight and high-precision optical path component connection.

[0060] Surface pretreatment involves cleaning (e.g., wiping with alcohol) and roughening (e.g., sandblasting) the mounting surface of the reflector mount on the water-cooled plate of the housing, the bottom surface of the reflector mount, and the edges of the light guide lens to enhance the adhesion of the bonding surfaces. Adhesive application and positioning: UV adhesive (e.g., high-strength optical grade adhesive with a light transmittance >95% after curing) is evenly applied to the contact interface between the reflector mount and the water-cooled plate of the housing. After quick alignment and positioning, slight pressure is applied for fixation. Similarly, adhesive is applied to the mating surfaces of the reflector mount and the light guide lens to ensure that the lens angle error is <5 arcminutes.

[0061] The curing process involves ultraviolet (UV) irradiation (wavelength 365nm, illuminance ≥1000mW / cm²). 2 The adhesive layer is cured for 30-60 seconds to form a high-strength bonding layer, while preventing adhesive contamination of the optical path surface. This eliminates the need for screw holes and washers required for mechanical fastening, reducing weight, improving optical path stability, and preventing lens displacement due to loose screws. It is suitable for high-frequency vibration environments.

[0062] In some embodiments, the interior or surface of the housing water-cooling plate is provided with heat dissipation grooves, which are used to increase the light spot reflection area to improve heat dissipation efficiency.

[0063] By setting heat dissipation grooves inside or on the surface of the water-cooled plate in the casing, the reflective absorption area of ​​garbage light is increased through the inclined structure, thereby improving heat dissipation efficiency.

[0064] The inclined trough structure design includes: Location: An inclined trough is machined in the waste light absorption area (such as the end of the light path) of the water-cooled plate of the casing. The trough depth is 0.5-2mm, the width is 5-10mm, and the inclination angle is 15°-45° (optimized according to the light path design). Surface treatment involves spraying a high-absorption coating (such as black alumina or carbon-based coating, with an absorption rate >95%) onto the inner wall of the trough, or directly utilizing the rough surface of the water-cooled plate metal substrate (such as copper or aluminum) to enhance diffuse reflection.

[0065] The flow channel is designed to closely align with the internal cooling channels of the water-cooled plate at the bottom of the inclined trough (distance ≤2mm), rapidly transferring the absorbed heat to the coolant through metal conduction. When light from the waste enters the inclined trough, it is absorbed by the trough wall after multiple reflections, converting into heat energy. This heat is then carried away through heat exchange between the water-cooled plate and the coolant, resulting in a larger heat dissipation area compared to a planar structure.

[0066] In some embodiments, the light guide lens is used to reflect the garbage light into the heat dissipation groove of the water-cooled plate of the housing, thereby achieving heat dissipation and absorption of the garbage light through the heat dissipation groove.

[0067] The light guide lens reflects the unused waste light into the heat dissipation grooves of the water-cooled plate in the casing, and the heat is transferred through the absorption structure of the grooves.

[0068] The optical path design incorporates a light guide lens at the end of the laser's optical path. The lens surface is coated with a high-reflectivity film (e.g., reflectivity >99% for 800nm ​​wavelength), and the reflection direction is aligned with the heat dissipation chute. Waste light (such as uncoupled pump light or scattered light) is reflected by the light guide lens and incident along the chute's angled path, ensuring the light spot completely covers the chute area. The chute absorbs the reflected light by converting it into heat energy through a high-absorption coating or rough surface on the inner wall of the chute. This heat is then conducted to the cooling channels via the water-cooled plate, preventing the waste light from directly irradiating other components and causing thermal damage. The integrated design combines waste light absorption with water-cooled plate heat dissipation, replacing the traditional separate "waste can" component, saving space and improving heat dissipation efficiency.

[0069] In some embodiments, the tilt angle of the heat dissipation groove matches the reflection angle of the light guide lens to ensure that the garbage light is accurately reflected into the heat dissipation groove.

[0070] The tilt angle of the heat dissipation groove is precisely matched with the reflection angle of the light guide lens to ensure that the garbage light is incident on the absorption area of ​​the groove without deviation.

[0071] Angle calculation is performed by simulating the light path of the waste through optical simulation software (such as Zemax) to determine the reflection angle θ1 of the light guide lens (the angle between the reflection angle and the lens normal). The tilt angle θ2 of the heat dissipation chute is designed to be the complementary angle of θ1 (θ1+θ2=90°), or adjusted according to the actual optical path to make the center of the reflected light spot coincide with the center of the chute, with an error of <0.1mm.

[0072] The machining accuracy is controlled within ±0.5° by the installation angle tolerance of the light guide lens and ±0.2° by the machining angle tolerance of the inclined groove, achieved through precision CNC machining or laser cutting. During assembly, an angle gauge is used for calibration to ensure that the reflection direction of the lens is strictly aligned with the tilt direction of the inclined groove, preventing light energy from overflowing into the non-absorption area.

[0073] In some embodiments, a lens mounting V-groove is provided on the light guide side plate, and the light guide lens is positioned and installed through the lens mounting V-groove and fixed with UV adhesive.

[0074] A V-groove for lens installation is set on the light guide side plate. The light guide lens is positioned by the V-groove and fixed with UV glue, thereby improving the lens installation accuracy.

[0075] The V-groove structure involves machining a 90° V-shaped groove in the lens mounting area of ​​the light guide side plate. The groove width matches the lens diameter (tolerance ±0.02mm), and the depth is half the lens thickness, ensuring that the lens axis coincides with the center line of the V-groove.

[0076] The installation process involves placing the light guide lens into the V-groove, utilizing the self-centering property of the V-groove for automatic alignment, and adjusting the lens position to the designed coordinates (accuracy ±5μm). UV adhesive is applied to the contact interface between the lens and the V-groove; after UV curing, a rigid connection is formed, and a retaining ring is added to the lens edge to prevent displacement. The V-groove positioning accuracy is higher than traditional planar installation (error reduced from ±50μm to ±5μm), reducing optical path adjustment time and making it suitable for high-precision laser processing scenarios.

[0077] In some embodiments, the sidewall water channels of the housing water-cooling plate are connected to the internal cooling water channels to form an integrated water-cooling circulation path.

[0078] The water cooling channels on the side wall of the casing's water-cooling plate are connected to the internal cooling channels, forming an integrated water-cooling circulation path and improving the overall heat dissipation uniformity.

[0079] The water cooling system design includes: Internal main water channel: employing a serpentine or mesh-like flow path to cover the core heat source of the laser (such as the gain medium and pump module). Side wall secondary water channels: parallel flow paths are machined on both sides of the water-cooled plate, connecting to the main water channel through radial through-holes to form a "main-secondary" parallel circulation.

[0080] Fluid distribution involves the cooling medium flowing into the main water channel from the standard water-cooling connector. A portion of the fluid enters the secondary water channel through sidewall openings, flowing past the light guide plate and the area near the reflector mount, carrying away edge heat, and finally converging at the outlet. Compared to a single internal flow channel, the sidewall water channel reduces the surface temperature difference of the water-cooling plate, preventing optical path distortion caused by localized overheating.

[0081] In some embodiments, a sealing ring is provided in the sealing groove of the flow channel cover plate, and the sealing ring is used to seal the connection interface between the housing water cooling plate and the flow channel cover plate.

[0082] A sealing ring is installed in the sealing groove of the flow channel cover to seal the connection interface between the water-cooled plate of the casing and the flow channel cover, preventing coolant leakage.

[0083] The sealing structure is achieved by machining an annular sealing groove (1.5mm deep and 2mm wide) on the edge of the flow channel on the mating surface of the flow channel cover plate and the water-cooling plate of the housing, and embedding an O-ring (made of fluororubber, temperature resistant from -20℃ to 150℃) in the groove.

[0084] Before installing the flow channel cover, apply a small amount of sealing grease to the sealing groove, place the sealing ring, and confirm that it is not twisted. Tighten the cover screws evenly (torque controlled at 2-3 N*m) to compress the sealing ring to 20%-30%, forming a static seal on the end face with a pressure resistance ≥1.5MPa. After assembly, perform a water pressure test (0.8MPa pressure, held for 5 minutes) to ensure no leakage.

[0085] In some embodiments, a sealing ring is provided in the sealing groove of the light guide side plate, and the sealing ring is used to seal the connection interface between the housing water cooling plate and the light guide side plate.

[0086] A sealing ring is installed in the sealing groove of the light guide side plate to seal the connection interface between the water cooling plate of the housing and the light guide side plate, preventing external impurities from entering and internal heat loss.

[0087] The sealing design involves machining a rectangular sealing groove at the edge of the contact surface between the light guide side plate and the water-cooling plate of the housing. The groove is 1mm deep and 3mm wide, and is matched with a rectangular sealing ring (made of silicone rubber, which is both elastic and weather-resistant).

[0088] The installation procedure involves embedding the sealing ring into the sealing groove of the light guide side plate, aligning it with the mounting screw holes of the water-cooling plate on the housing, and pre-tightening the screws until the sealing ring is slightly compressed. Tighten the screws in stages (diagonally) to ensure even force distribution on the sealing ring, forming a sealing barrier against external dust and moisture, while reducing heat loss through radiation. Suitable for high-humidity or dusty industrial environments, improving the long-term reliability of the laser.

[0089] In some embodiments, the sealing gasket on the ED plug is an annular structure, and the sealing gasket is embedded in the threaded interface between the ED plug and the water-cooling plate of the housing to achieve a seal.

[0090] The sealing gasket of the ED plug adopts a ring structure and is embedded in the threaded interface to achieve a reliable seal at the end of the cooling water channel.

[0091] In some embodiments, such as Figures 1 to 8 As shown, the first aspect of this utility model provides a water-cooled structure for a high-power industrial femtosecond laser, including a set screw 1, a housing water-cooling plate 2, a standard water-cooling connector 3, a flow channel cover 4, a light guide side plate 5, a reflector mount 6, a light guide lens 7, and an ED plug 8.

[0092] The internal water passage of the housing water-cooling plate 2 is sealed by the flow channel cover plate 4, ED plug 8, and set screw 1. The flow channel cover plate 4 and the housing water-cooling plate 2 are connected by screws, and the ED plug 8 and set screw 1 are threadedly engaged with the housing water-cooling plate 2.

[0093] like Figure 2 , 3 As shown, the water channels on the side wall of the water-cooled plate 2 of the housing are connected to the internal water channels of the water-cooled plate 2 of the housing through the ED plug 8 and the set screw 1.

[0094] like Figure 4 As shown, the water-cooled plate 2 of the casing has a heat dissipation groove inside, which increases the light spot reflection area and thus improves the heat dissipation efficiency.

[0095] like Figure 5 , 6As shown, the light guide side plate 5 is provided with the mounting V-groove required for the light guide lens 7, and the light guide lens 7 is bonded to the mounting V-groove with UV adhesive. The light guide side plate 5 is provided with a sealing groove for mounting the sealing ring 502. The light guide side plate 5 is locked to the water cooling plate 2 of the housing by locking screws 501.

[0096] like Figure 7 As shown, the flow channel cover 4 is provided with a sealing groove for installing the sealing ring 401, and the flow channel cover 4 is locked to the water cooling plate 2 of the housing by locking screws 402. Figure 8 The reflector mount 6 is first bonded to the light guide lens 7 with UV adhesive, and then the reflector mount 6 is bonded to the water cooling plate 2 of the housing with UV adhesive.

[0097] In summary, this invention integrates the internal water channels of the laser and the trash can through a water channel design on the housing's water-cooling plate, thereby achieving integrated water cooling for the high-power femtosecond laser. This reduces the proportion of the trash can inside the laser, decreases the number of components, and lowers manufacturing costs. Side-plate water cooling improves the laser's thermal stability, making it more resistant to external temperature influences and resulting in better temperature uniformity on the laser housing's water-cooling plate.

[0098] The sealing gasket is a ring-shaped elastomer (made of nitrile rubber), with an inner diameter matching the minor diameter of the ED plug thread and an outer diameter slightly larger than the outer diameter of the threaded hole in the water-cooling plate of the housing. Its thickness is 1-1.5mm. An annular groove is created on the end face of the ED plug, and the sealing gasket is embedded into this groove, ensuring a complete fit between the gasket and the end face of the threaded hole in the water-cooling plate. When the ED plug is screwed in, the thread preload compresses the sealing gasket, filling the thread gap (tolerance H7 / g6), forming a double protection of "thread seal + end face seal" to prevent coolant leakage from the thread gap. Compared to traditional PTFE tape seals, the ring-shaped gasket seal is more reliable, can be repeatedly disassembled, and avoids debris contaminating the water system.

[0099] This invention integrates the internal water channels of the laser with those of the waste bin through a unified water channel design on the housing water-cooling plate. This eliminates the space occupied by the separate waste bin, reduces the number of accessories (such as independent water pipes and connectors), significantly lowers processing costs and assembly complexity, and facilitates the miniaturized integrated design and mass production of the laser. The water channels on the side wall of the housing water-cooling plate are connected to the internal water channels, forming an integrated water-cooling circulation path. The side-plate water-cooling design of the light guide plate improves the overall heat conduction efficiency of the laser, enhances its resistance to external temperature interference, and significantly improves the temperature uniformity of the housing water-cooling plate. The light from the waste bin is reflected into the heat dissipation grooves of the housing water-cooling plate through a light guide lens. These grooves increase the light spot reflection and absorption area, achieving efficient absorption and conduction of heat from the waste bin light, further improving heat dissipation efficiency.

[0100] Compared with existing technologies, this invention integrates the internal water channels of the laser and the trash can through a water channel design on the housing's water-cooling plate. This achieves integrated water cooling for the high-power femtosecond laser, reducing the proportion of the trash can inside the laser, decreasing the number of components, and lowering manufacturing costs. Side-plate water cooling improves the laser's thermal stability, making it more resistant to external temperature influences and resulting in better temperature uniformity on the laser housing's water-cooling plate.

[0101] It should be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. It should be understood that when an element or layer is referred to as “on,” “adjacent to,” “connected to,” or “coupled to” other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as “directly on,” “directly adjacent to,” “directly connected to,” or “directly coupled to” other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are merely used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this application, the first element, component, area, layer, or portion discussed below may be referred to as a second element, component, area, layer, or portion.

[0102] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below,” “under,” or “below” other elements or features will be oriented “above” other elements or features. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly.

[0103] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0104] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0105] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A water-cooling structure for a high-power industrial femtosecond laser, characterized in that, Includes set screws, housing water-cooling plate, standard water-cooling connector, flow channel cover, light guide side plate, reflector mount, light guide lens, ED plug and sealing ring; The housing water-cooling plate has a cooling water channel inside. The channel cover, ED plug and set screw are used to seal the cooling water channel. The housing water-cooling plate and the channel cover are connected by screws. The channel cover is provided with a sealing groove. The ED plug is threaded into the water-cooling plate of the housing, and a sealing gasket is installed on the ED plug; the set screw is threaded into the water-cooling plate of the housing. A reflector mount is provided on the water-cooled plate of the casing, and a light guide lens is provided on the reflector mount; A light guide plate is installed on the side wall of the housing water-cooling plate. The housing water-cooling plate and the light guide plate are connected by screws. The light guide plate is provided with a light guide lens and a sealing ring. A standard water-cooling connector is threaded to one side of the housing water-cooling plate.

2. The water-cooling structure for a high-power industrial femtosecond laser according to claim 1, characterized in that, The housing water-cooling plate and the reflector mount, as well as the reflector mount and the light guide lens, are fixed together by UV adhesive.

3. The water-cooling structure for a high-power industrial femtosecond laser according to claim 1, characterized in that, The interior or surface of the water-cooled plate of the casing is provided with heat dissipation grooves, which are used to increase the light spot reflection area to improve heat dissipation efficiency.

4. The water-cooling structure for a high-power industrial femtosecond laser according to claim 3, characterized in that, The light guide lens is used to reflect the garbage light into the heat dissipation groove of the water-cooled plate of the casing, and the heat dissipation groove is used to absorb and dissipate the garbage light.

5. The water-cooling structure for a high-power industrial femtosecond laser according to claim 3, characterized in that, The tilt angle of the heat dissipation groove matches the reflection angle of the light guide lens to ensure that the garbage light is accurately reflected into the heat dissipation groove.

6. The water-cooling structure for a high-power industrial femtosecond laser according to claim 1, characterized in that, The light guide side plate is provided with a lens mounting V-groove, and the light guide lens is positioned and installed through the lens mounting V-groove and fixed with UV adhesive.

7. The water-cooling structure for a high-power industrial femtosecond laser according to claim 1, characterized in that, The side wall water channels of the casing water-cooling plate are connected to the internal cooling water channels, forming an integrated water-cooling circulation path.

8. The water-cooling structure for a high-power industrial femtosecond laser according to claim 1, characterized in that, A sealing ring is provided in the sealing groove of the flow channel cover plate, and the sealing ring is used to seal the connection interface between the housing water cooling plate and the flow channel cover plate.

9. The water-cooling structure for a high-power industrial femtosecond laser according to claim 1, characterized in that, A sealing ring is provided in the sealing groove of the light guide side plate, and the sealing ring is used to seal the connection interface between the housing water cooling plate and the light guide side plate.

10. The water-cooling structure for a high-power industrial femtosecond laser according to claim 1, characterized in that, The sealing gasket on the ED plug has a ring structure, and the sealing gasket is embedded in the threaded interface between the ED plug and the water-cooling plate of the housing to achieve a seal.

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