Laser welding protection lens

Abstract

The embodiment of the utility model provides a laser welding protection lens. The laser welding protection lens comprises a substrate and a hydrophobic layer, the hydrophobic layer is arranged on the substrate, and the hydrophobic layer comprises at least one of a concave structure and a convex structure; the sides, away from the substrate, of the concave structures and / or the convex structures are located on the same plane. The concave structures or the convex structures are arranged on the substrate, so that the problem that the laser welding protection lens is damaged due to the fact that splashed molten liquid drops are attached to the substrate is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding, and more specifically, to a laser welding protective lens. Background Art

[0002] In the process of laser welding metal weldments, the interaction between the laser and the workpiece will cause the metal weldment to absorb the laser energy and melt rapidly or even vaporize. However, due to the excessive vapor pressure in the molten pool, it is easy for the vapor to spray out of the molten pool and bring out the liquid in the molten pool to form splashing molten droplets. The splashing molten droplets are easy to adhere to the protective lens and cause damage to the protective lens.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Utility Model Content

[0004] One purpose of the utility model is to provide a new technical solution for laser welding protective lenses.

[0005] According to a first aspect of the utility model, a laser welding protective lens is provided, wherein the laser welding protective lens comprises:

[0006] substrate;

[0007] A hydrophobic layer, the hydrophobic layer is disposed on the substrate, and the hydrophobic layer includes at least one of a concave structure and a convex structure;

[0008] Wherein, the side of the concave structure and / or the convex structure facing away from the substrate is located in the same plane.

[0009] Optionally, the recessed structure includes a plurality of recessed portions, and the sides of the plurality of recessed portions facing away from the substrate are located in the same plane.

[0010] Optionally, the distance between two adjacent recessed portions is 5-10 μm.

[0011] Optionally, the cross-sectional shape of the recessed portion includes at least one of a square and a rectangle.

[0012] Optionally, the protrusion structure includes a plurality of protrusions, and the sides of the plurality of protrusions facing away from the substrate are located in the same plane.

[0013] Optionally, the distance between two adjacent protrusions is 5-10 μm.

[0014] Optionally, the cross-sectional shape of the protrusion includes at least one of a square and a rectangle.

[0015] Optionally, the laser welding protective lens further comprises a coating layer, and the coating layer is arranged on a side of the hydrophobic layer facing away from the substrate.

[0016] Optionally, the coating layer includes an anti-reflection film and a dust-proof film, and the anti-reflection film is arranged between the hydrophobic layer and the dust-proof film.

[0017] Optionally, the thickness of the antireflection film is in the range of 0.2 to 0.4 μm.

[0018] Optionally, the dust-proof film has a thickness ranging from 20 to 40 nm.

[0019] According to the laser welding protective lens provided by an embodiment of the utility model, the laser welding protective lens includes a substrate and a hydrophobic layer, the hydrophobic layer is arranged on the substrate, and the hydrophobic layer includes at least one of a concave structure and a convex structure; wherein the concave structure and / or the convex structure are located in the same plane on a side away from the substrate; by arranging the concave structure or the convex structure on the substrate, the problem of splashing molten droplets adhering to the substrate and damaging the laser welding protective lens is effectively avoided.

[0020] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0022] Figure 1 It is a schematic structural diagram of a laser welding protective lens in one embodiment of the utility model.

[0023] Figure 2 It is a top view of the recessed structure in one embodiment of the utility model.

[0024] Figure 3 It is a front view of the recessed structure in one embodiment of the utility model.

[0025] Figure 4 It is a top view of a protruding structure in one embodiment of the utility model.

[0026] Figure 5 It is a front view of a raised structure in one embodiment of the utility model.

[0027] Figure 6 It is a top view of the recessed portion using the first arrangement in one embodiment of the utility model.

[0028] Figure 7It is a top view of the recessed portion adopting the second arrangement mode in one embodiment of the utility model.

[0029] Figure 8 It is a top view of the recessed portion adopting the third arrangement mode in one embodiment of the utility model.

[0030] Fig. 9 It is a schematic structural diagram of a coating layer in one embodiment of the utility model.

[0031] Description of reference numerals:

[0032] 1. Substrate;

[0033] 2. Coating layer; 21. Anti-reflection film; 22. Dust-proof film;

[0034] 3. hydrophobic layer; 31. concave structure; 311. concave portion; 32. convex structure; 321. convex portion;

[0035] 4. Splashing molten droplets;

[0036] 5. Contact angle. DETAILED DESCRIPTION

[0037] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0038] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0039] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0040] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0043] According to one embodiment of the present application, a laser welding protective lens is provided. Figures 1 to 9 The laser welding protective lens includes a substrate 1 and a hydrophobic layer 3, wherein the hydrophobic layer 3 is arranged on the substrate 1, and the hydrophobic layer 3 includes at least one of a concave structure 31 and a convex structure 32; wherein the concave structure 31 and / or the convex structure 32 are located in the same plane on a side away from the substrate 1.

[0044] Specifically, Figure 1 As shown, the material of the substrate 1 in the embodiment of the present application is quartz glass to ensure that the laser welding protective lens has the characteristics of high light transmittance, high heat resistance and high laser damage threshold. The hydrophobic layer 3 is a micron-scale cubic structure arranged in a specific manner by processing the surface of the substrate 1 using precision processing technology. The micron-scale cubic structure includes at least one of a concave structure 31 and a convex structure 32, and the concave structure 31 and / or the convex structure 32 are located in the same plane on the side away from the substrate 1.

[0045] Thus, in the process of laser welding metal weldments, since the recessed structure 31 and / or the raised structure 32 are located in the same plane away from the side of the substrate 1, the laser welding protective lens has a strong hydrophobicity. Therefore, when the splashing molten droplets 4 formed by the liquid in the molten pool brought out by the steam spraying out of the molten pool adhere to the laser welding protective lens, the contact angle 5 between the splashing molten droplets 4 and the hydrophobic layer 3 will be greater than 120°, thereby effectively preventing the splashing molten droplets 4 from adhering to the laser welding protective lens, and significantly extending the service life of the laser welding protective lens.

[0046] In addition, the substrate 1 may also be made of other materials while meeting the requirements of high light transmittance, high heat resistance and high laser damage threshold required by the laser welding protective lens.

[0047] Furthermore, in the embodiment of the present application, the hydrophobic layer 3 may be processed first, and then the hydrophobic layer 3 is disposed on the substrate 1 .

[0048] In addition, the hydrophobic layer 3 described in the embodiment of the present application may also be a micron-scale cylindrical structure, a micron-scale truncated cone structure, or a micron-scale prism structure, etc. Those skilled in the art may make a selection according to actual needs, and the present application does not make any specific restrictions here.

[0049] In one embodiment, the recessed structure 31 includes a plurality of recessed portions 311 , and the sides of the plurality of recessed portions 311 facing away from the substrate 1 are located in the same plane.

[0050] Specifically, Figure 2 and Figure 3 As shown, the embodiment of the present application uses precision machining technology to process the surface of the substrate 1 into the recessed structure 31, and the recessed structure 31 includes a plurality of recessed portions 311, and the plurality of recessed portions 311 are located in the same plane on the side away from the substrate 1.

[0051] Therefore, the embodiment of the present application effectively simplifies the processing difficulty of the recessed structure 31 by configuring the recessed structure 31 to be a plurality of recessed portions 311 and making the plurality of recessed portions 311 located on the same plane away from the side of the substrate 1, thereby significantly reducing the manufacturing cost of the laser welding protective lens.

[0052] In addition, there are many arrangements of the recessed portions 311 in the embodiment of the present application, for example Figure 6 As shown, the first arrangement can be used for arrangement; or, as Figure 7 As shown, the second arrangement can be used for arrangement; or, as Figure 8As shown, a third arrangement can be adopted for arrangement, and those skilled in the art can make a selection according to actual needs, and this application does not make any specific limitation here.

[0053] In one embodiment, the distance between two adjacent recessed portions 311 is 5-10 μm.

[0054] Specifically, Figure 2 and Figure 3 As shown, the embodiment of the present application sets the distance between two adjacent recesses 311 to 5 to 10 μm, which can better adapt to the working requirements of the laser working wavelength during laser welding of metal welds, thereby significantly enhancing the welding accuracy and welding quality of laser welding.

[0055] In one embodiment, the cross-sectional shape of the recessed portion 311 includes at least one of a square and a rectangle.

[0056] Specifically, Figure 2 and Figure 3 As shown, the embodiment of the present application effectively simplifies the processing difficulty of the recessed structure 31 by setting the cross-sectional shape of the recessed portion 311 to at least one of a square or a rectangle, thereby significantly reducing the manufacturing cost of the laser welding protective lens.

[0057] In addition, since the cross-sectional shape of the recessed portion 311 is at least one of a square or a rectangle, the hydrophobicity of the laser welding protective lens is further improved, making it less likely for the splashing molten droplets 4 to adhere to the laser welding protective lens, thereby further extending the service life of the laser welding protective lens.

[0058] Furthermore, when the cross-sectional shape of the recessed portion 311 is at least one of a square or a rectangle, it can further prevent the transmission path of the laser beam from changing when passing through the laser welding protective lens, thereby effectively ensuring the welding accuracy and welding quality of the laser welding.

[0059] In addition, in the process of laser welding metal weldments, since the diameter of the laser spot used for welding is usually in the micron level, and the optical path difference of the incident light at different positions is also in the micron level, in order to avoid the influence of the recessed structure 31 on the welding spot, it is preferred to set the side length range of the square to 5 to 10 μm, or set the side length range of the rectangle to 5 to 10 μm.

[0060] In one embodiment, the protrusion structure 32 includes a plurality of protrusions 321 , and the sides of the plurality of protrusions 321 facing away from the substrate 1 are located in the same plane.

[0061] Specifically, Figure 4 and Figure 5 As shown, the embodiment of the present application uses precision machining technology to process the surface of the substrate 1 into the protruding structure 32, and the protruding structure 32 includes a plurality of protruding portions 321, and the plurality of protruding portions 321 are located in the same plane on the side away from the substrate 1.

[0062] Therefore, the embodiment of the present application effectively simplifies the processing difficulty of the protrusion structure 32 by configuring the protrusion structure 32 to be a plurality of protrusions 321, and making the plurality of protrusions 321 located on the same plane away from the side of the substrate 1, thereby significantly reducing the manufacturing cost of the laser welding protective lens.

[0063] In addition, there are many arrangements of the protrusion structures 32 described in the embodiments of the present application, and those skilled in the art can choose according to actual needs, and the present application does not make any specific restrictions here.

[0064] In one embodiment, the distance between two adjacent protrusions 321 is 5-10 μm.

[0065] Specifically, Figure 4 and Figure 5 As shown, the embodiment of the present application sets the distance between two adjacent protrusions 321 to 5 to 10 μm, which can better adapt to the working requirements of the laser working wavelength during laser welding of metal welds, thereby significantly enhancing the welding accuracy and welding quality of laser welding.

[0066] In one embodiment, the cross-sectional shape of the protrusion 321 includes at least one of a square and a rectangle.

[0067] Specifically, Figure 4 and Figure 5 As shown, the embodiment of the present application effectively simplifies the processing difficulty of the protrusion structure 32 by setting the cross-sectional shape of the protrusion 321 to at least one of a square or a rectangle, thereby significantly reducing the manufacturing cost of the laser welding protective lens.

[0068] In addition, since the cross-sectional shape of the raised portion 321 is at least one of a square or a rectangle, the hydrophobicity of the laser welding protective lens is further improved, making it less likely for the splashing molten droplets 4 to adhere to the laser welding protective lens, thereby further extending the service life of the laser welding protective lens.

[0069] Furthermore, when the cross-sectional shape of the raised portion 321 is at least one of a square or a rectangle, it can further prevent the transmission path of the laser beam from changing when passing through the laser welding protective lens, thereby effectively ensuring the welding accuracy and welding quality of the laser welding.

[0070] In addition, in the process of laser welding metal weldments, since the diameter of the laser spot used for welding is usually in the micron level, and the optical path difference of the incident light at different positions is also in the micron level, in order to avoid the influence of the protruding structure 32 on the welding spot, it is preferred to set the side length range of the square to 5 to 10 μm, or set the side length range of the rectangle to 5 to 10 μm.

[0071] In one embodiment, the laser welding protective lens further includes a coating layer 2 , and the coating layer 2 is disposed on a side of the hydrophobic layer 3 facing away from the substrate 1 .

[0072] Specifically, Fig. 9 As shown, the embodiment of the present application can significantly increase the laser transmittance of the laser welding protective lens and reduce the energy loss of the laser when passing through the laser welding protective lens by arranging the coating layer 2 on the side of the hydrophobic layer 3 away from the substrate 1, thereby ensuring that the quality of the laser beam is not affected, and can also prevent high-intensity laser from directly irradiating the operator's eyes and skin to cause damage to the operator's vision and skin, thereby effectively reducing potential damage to the operator and equipment.

[0073] In addition, since the coating layer 2 also has a high laser damage threshold, the laser welding protective lens can withstand the irradiation of high-power laser without being damaged, and can also block the spatter and debris generated during the laser welding process to prevent them from damaging the lens, thereby effectively extending the service life of the laser welding protective lens.

[0074] In one embodiment, the coating layer 2 includes an anti-reflection film 21 and a dust-proof film 22 , and the anti-reflection film 21 is disposed between the hydrophobic layer 3 and the dust-proof film 22 .

[0075] Specifically, Fig. 9 As shown, the anti-reflection film 21 described in the embodiment of the present application includes a substrate and a thin film layer. The substrate can be made of materials such as quartz, K9 glass or zinc selenide. The thin film layer includes multiple thin film layers with different refractive indices, and the multiple thin film layers with different refractive indices are alternately stacked on the substrate.

[0076] Therefore, the embodiment of the present application arranges the anti-reflection film 21 in the coating layer 2 so that the anti-reflection film 21 can form multiple interfaces on the surface of the laser welding protective lens, so that the reflected light of the laser can undergo destructive interference on these interfaces, thereby significantly increasing the transmittance of the laser welding protective lens.

[0077] In one embodiment, the thickness of the anti-reflection film 21 is in the range of 0.2 to 0.4 μm.

[0078] Specifically, Fig. 9 As shown, an anti-reflection film 21 that is too thick will generate additional stress on the substrate, causing the laser welding protective lens to be deformed or damaged, and an anti-reflection film 21 that is too thick will also cause thermal expansion mismatch between the anti-reflection film 21 and the substrate 1 when the temperature changes, thereby seriously affecting the optical performance of the laser welding protective lens; in addition, an anti-reflection film 21 that is too thin will reduce the number of interfaces formed by the anti-reflection film 21 on the surface of the laser welding protective lens, thereby increasing the reflectivity of the laser welding protective lens, thereby seriously affecting the transmittance of the laser welding protective lens, and an anti-reflection film 21 that is too thin is also susceptible to mechanical damage or environmental erosion, resulting in a shorter service life of the laser welding protective lens.

[0079] Therefore, in order to extend the optical performance and service life of the laser welding protection lens, the thickness of the anti-reflection film 21 in the embodiment of the present application is preferably in the range of 0.2 to 0.4 μm.

[0080] In one embodiment, the thickness of the dustproof film 22 is in the range of 20-40 nm.

[0081] Specifically, Fig. 9 As shown, an overly thick dust-proof film 22 will reduce the light transmittance of the lens and affect the transmission efficiency of the laser. An overly thick dust-proof film 22 is also prone to generate additional stress on the surface of the laser welding protective lens, causing the laser welding protective lens to crack or deform. In addition, an overly thin dust-proof film 22 cannot provide adequate protection and is easily penetrated by dust, dirt and splashes, shortening the service life of the laser welding protective lens.

[0082] Therefore, in order to ensure that the dustproof film 22 has a better protective effect, the thickness of the dustproof film 22 in the embodiment of the present application is preferably in the range of 20 to 40 nm.

[0083] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0084] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A laser welding protective lens, characterized in that: include: Substrate (1); A hydrophobic layer (3), the hydrophobic layer (3) being arranged on the substrate (1), the hydrophobic layer (3) comprising at least one of a concave structure (31) and a convex structure (32); Wherein, the side of the recessed structure (31) and / or the raised structure (32) facing away from the substrate (1) is located in the same plane.

2. The laser welding protective lens according to claim 1, characterized in that: The recessed structure (31) comprises a plurality of recessed portions (311), and the sides of the plurality of recessed portions (311) facing away from the substrate (1) are located in the same plane.

3. The laser welding protective lens according to claim 2, characterized in that: The distance between two adjacent recessed portions (311) is 5 to 10 μm.

4. The laser welding protective lens according to claim 2, characterized in that: The cross-sectional shape of the recessed portion (311) includes at least one of a square and a rectangle.

5. The laser welding protective lens according to claim 1, characterized in that: The protrusion structure (32) comprises a plurality of protrusions (321), and the sides of the plurality of protrusions (321) facing away from the substrate (1) are located in the same plane.

6. The laser welding protective lens according to claim 5, characterized in that: The distance between two adjacent protrusions (321) is 5 to 10 μm.

7. The laser welding protective lens according to claim 5, characterized in that: The cross-sectional shape of the protrusion (321) includes at least one of a square and a rectangle.

8. The laser welding protective lens according to claim 1, characterized in that: The laser welding protective lens further comprises a coating layer (2), wherein the coating layer (2) is arranged on a side of the hydrophobic layer (3) facing away from the substrate (1).

9. The laser welding protective lens according to claim 8, characterized in that: The coating layer (2) comprises an anti-reflection film (21) and a dust-proof film (22); the anti-reflection film (21) is arranged between the hydrophobic layer (3) and the dust-proof film (22).

10. The laser welding protective lens according to claim 9, characterized in that: The thickness of the antireflection film (21) is in the range of 0.2 to 0.4 μm.

11. The laser welding protective lens according to claim 9, characterized in that: The thickness of the dustproof film (22) is in the range of 20 to 40 nm.

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