Water-guided laser processing head with anti-fog function

Abstract

This utility model discloses a water-guided laser processing head with anti-fogging function, comprising: a focusing lens assembly, including: an upper connecting seat, a focusing lens, and a lower connecting seat. The upper end of the focusing lens is connected to the lower end of the upper connecting seat, and the lower end of the focusing lens is connected to the lower connecting seat. A first air inlet is provided on the upper connecting seat, through which positive pressure gas enters and fills the space above the focusing lens. A second air inlet is provided on the lower connecting seat, through which positive pressure gas enters and fills the space below the focusing lens. This utility model, by introducing positive pressure gas into the space above and below the focusing lens through the first and second air inlets, respectively, prevents external water mist from entering the focusing lens assembly, thus preventing fogging of the focusing lens and ensuring laser focusing effect.

Description

Technical Field

[0001] This utility model relates to the field of water-guided laser processing technology, specifically to a water-guided laser processing head with anti-fog function. Background Technology

[0002] The water-guided laser processing head is a crucial component in water-guided laser processing. Typically, to ensure optimal workpiece processing results, the water-guided laser processing head needs adjustment before use to ensure the laser beam and water jet are coaxial. This adjustment process involves first aligning the focal point of the laser beam, passing through the focusing lens, to the coupling plane between the laser beam and the water jet. Then, the focal point is adjusted to the coupling point between the laser beam and the water jet on that plane. Currently, this adjustment process is usually achieved by adjusting the focusing lens. Specifically, the position of the focusing lens is adjusted along the straight line of the focused laser beam to align the focal point with the coupling plane, and then the position of the focusing lens is adjusted along the plane of the focusing lens to make the focal point of the laser beam coincide with the coupling point. Therefore, the focusing lens is a vital component for focusing the laser beam.

[0003] However, during the manufacturing process, water spray may seep into the focusing lens assembly through assembly gaps, causing the focusing lens to fog up and affecting the focusing effect. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the focusing lens in the prior art is prone to fogging and has poor focusing effect.

[0005] Therefore, this utility model provides a water-guided laser processing head with anti-fog function.

[0006] A water-guided laser processing head with anti-fog function according to an embodiment of the present invention includes:

[0007] A focusing lens assembly includes: an upper connecting base, a focusing lens, and a lower connecting base, wherein the upper end of the focusing lens is connected to the lower end of the upper connecting base, and the lower end of the focusing lens is connected to the lower connecting base.

[0008] The upper connecting seat has a first air inlet, through which positive pressure gas enters and fills the space above the focusing lens; the lower connecting seat has a second air inlet, through which positive pressure gas enters and fills the space below the focusing lens.

[0009] The beneficial effect of this utility model is that positive pressure gas is introduced into the space above and below the focusing lens through the first air inlet and the second air inlet, respectively, so that external water mist cannot enter the focusing lens assembly, which can prevent the focusing lens from fogging and ensure the laser focusing effect.

[0010] According to one embodiment of the present invention, the water-guided laser processing head further includes: a mounting base, wherein the mounting base has a mounting cavity inside, the mounting base is connected to the upper connecting base, and the mounting cavity communicates with the interior of the upper connecting base so that positive pressure gas can fill the mounting cavity.

[0011] According to one embodiment of the present invention, a first channel is provided in the upper connecting seat, the first channel is connected to the mounting cavity, and the first channel is connected to the first air inlet.

[0012] According to one embodiment of the present invention, the lower connecting seat includes: a first connecting part and a second connecting part, the first connecting part and the second connecting part are fixedly connected, the first connecting part is connected to the focusing lens, the second connecting part is connected to the coupling component, and the lower connecting seat is hollow inside.

[0013] According to one embodiment of the present invention, a frustum-shaped cavity is provided between the lower connecting seat and the coupling assembly, and a venting gap is provided between the first connecting part and the second connecting part, and the frustum-shaped cavity is connected to the venting gap.

[0014] According to one embodiment of the present invention, the mounting base includes multiple mounting parts, which are integrally formed or spliced ​​together.

[0015] According to one embodiment of the present invention, the upper connecting seat includes: a third connecting part and an upper connecting body, the third connecting part and the upper connecting body are fixedly connected, the third connecting part is connected to the mounting base, the upper connecting body is connected to the focusing lens, and the first channel is formed in the upper connecting body.

[0016] According to one embodiment of the present invention, the mounting base is provided with a first light guide hole, the third connecting part is connected to the edge of the first light guide hole, and the first channel is connected to the mounting cavity through the first light guide hole.

[0017] According to one embodiment of the present invention, the third connecting part is provided with a first stepped surface, and an aperture is provided on the first stepped surface. A second light guide hole with an adjustable aperture is opened at the center of the aperture, and the second light guide hole is connected to the first channel.

[0018] According to one embodiment of the present invention, the plurality of mounting portions are: a first mounting portion, a second mounting portion, and a third mounting portion, the first mounting portion, the second mounting portion, and the third mounting portion are internally connected, the third mounting portion is connected to the focusing lens assembly, a reflector is installed in the first mounting portion, a semi-reflective lens is installed in the second mounting portion, and a reflector is installed in the third mounting portion.

[0019] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description, claims, and drawings.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the structure of the water-guided laser processing head of this utility model.

[0023] Figure 2 This is a cross-sectional view of the water-guided laser processing head of this utility model.

[0024] Figure 3 This is a three-dimensional schematic diagram of the focusing lens assembly of this utility model.

[0025] Figure 4 This is a cross-sectional view of the focusing lens assembly of this utility model.

[0026] Figure 5 This is a schematic diagram of the frustum-shaped chamber of this utility model.

[0027] Figure 6 This is a cross-sectional view of the mounting base of this utility model.

[0028] In the diagram: 1. Mounting base; 2. Focusing lens assembly; 3. Coupling assembly; 4. Visual monitoring assembly; 5. Laser adjustable collimation assembly; 6. Frustum chamber; 11. Mounting cavity; 12. First light guide hole; 13. First mounting part; 14. Second mounting part; 15. Third mounting part; 16. Sealing plate; 21. Upper connecting base; 22. Focusing lens; 23. Lower connecting base; 211. First air inlet; 230. Second air inlet; 231. First connecting part; 232. Second connecting part; 233. Vent gap; 212. First channel; 213. Third connecting part; 214. Upper connecting body; 2131. First stepped surface; 215. Aperture; 2151. Second light guide hole; 41. Light source. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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 of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0032] like Figure 1 and Figure 2 As shown, the water-guided laser processing head of this embodiment includes a focusing lens assembly 2, which includes an upper connecting seat 21, a focusing lens 22, and a lower connecting seat 23. The upper end of the upper connecting seat 21 is connected to the mounting base 1, the upper end of the focusing lens 22 is connected to the lower end of the upper connecting seat 21, and the lower end of the focusing lens 22 is connected to the lower connecting seat 23. The upper connecting seat 21 has a first air inlet 211, through which positive pressure gas enters and fills the space above the focusing lens 22. The lower connecting seat 23 has a second air inlet 230, through which positive pressure gas enters and fills the space below the focusing lens 22.

[0033] It should be noted that the water-guided laser processing head will splash water mist during processing. This water mist may enter the focusing lens assembly 2 through the assembly gaps, causing the focusing lens 22 to fog up and affecting its focusing effect. In this embodiment, positive pressure gas is introduced into the space above and below the focusing lens 22 through the first air inlet 211 and the second air inlet 230, respectively, preventing external water mist from entering the focusing lens assembly 2 and thus preventing fogging of the focusing lens 22, ensuring the laser focusing effect.

[0034] In this embodiment, the water-guided laser processing head further includes a mounting base 1, which has a mounting cavity 11 inside. The mounting base 1 is connected to an upper connecting base 21, and the mounting cavity 11 communicates with the interior of the upper connecting base 21 so that positive pressure gas can fill the mounting cavity 11. Components such as reflectors are installed inside the mounting cavity 11, and water mist may enter the mounting cavity 11 through assembly gaps, causing fogging of the reflectors and other components. Therefore, in this embodiment, the mounting cavity 11 is connected to the interior of the upper connecting base 21, allowing positive pressure gas to fill the interior of the mounting cavity 11 and preventing fogging of the reflectors and other components.

[0035] In this embodiment, a coupling component 3 is connected to the lower end of the focusing lens assembly 2. The coupling component 3 is used to couple the laser beam with the high-pressure water beam.

[0036] like Figure 3 and Figure 5 As shown, the lower connecting seat 23 includes: a first connecting portion 231 and a second connecting portion 232. The first connecting portion 231 and the second connecting portion 232 are fixedly connected. The first connecting portion 231 is connected to the focusing lens 22, and the second connecting portion 232 is connected to the coupling assembly 3. A frustum-shaped cavity 6 is formed between the lower connecting seat 23 and the coupling assembly 3. Figure 5 (The area enclosed by the dotted line in the diagram) A venting gap 233 is provided between the first connecting part 231 and the second connecting part 232, and the frustum-shaped chamber 6 is connected to the venting gap 233. It should be noted that the diameter of the first connecting part 231 matches the diameter of the focusing lens 22, and the first connecting part 231 can, for example, be threaded to the lower end of the focusing lens 22. The second connecting part 232 is, for example, a clamp structure, which facilitates connection with the coupling assembly 3. The second air inlet 230 is provided on the first connecting part 231 and is connected to the frustum-shaped chamber 6. After the lower connecting seat 23 is assembled with the focusing lens 22 and the coupling assembly 3, the upper and lower ends of the frustum-shaped chamber 6 are sealed, and the positive pressure gas introduced from the second air inlet 230 can fill the frustum-shaped chamber 6. It should be explained here that the positive pressure gas cannot enter the interior of the coupling assembly 3, as this would affect the coupling effect between the laser spot and the water jet. Furthermore, the continuous introduction of positive pressure gas, without proper venting, can lead to excessive pressure inside the frustum chamber 6, causing it to burst. Therefore, this embodiment provides a venting gap 233 between the first connecting portion 231 and the second connecting portion 232. When positive pressure gas is introduced through the second air inlet 230 and gradually fills the frustum chamber 6, a small portion of the positive pressure gas can leak out through the venting gap 233. This prevents positive pressure gas from entering the coupling assembly 3 and also prevents excessive pressure inside the frustum chamber 6.

[0037] In this embodiment, a first channel 212 is provided inside the upper connecting seat 21, which communicates with the mounting cavity 11 and the first air inlet 211. The upper connecting seat 21 includes a third connecting part 213 and an upper connecting body 214, which are fixedly connected. The third connecting part 213 is connected to the mounting seat 1, and the upper connecting body 214 is connected to the focusing lens 22. The first channel 212 is provided inside the upper connecting body 214. A first light guide hole 12 is provided on the mounting seat 1, and the third connecting part 213 is connected to the edge of the first light guide hole 12. The first channel 212 communicates with the mounting cavity 11 through the first light guide hole 12. For example, the lower end of the upper connecting body 214 is threadedly connected to the focusing lens 22, and the third connecting part 213 is screwed to the mounting seat 1. Positive pressure gas is introduced through the first air inlet 211, gradually filling the first channel 212, and then entering the mounting cavity 11, filling the entire mounting cavity 11. After the positive pressure gas fills the first channel 212 and the mounting cavity 11, a small portion of the positive pressure gas can leak out through the assembly gap to prevent explosion due to excessive gas pressure.

[0038] In this embodiment, the length of the upper connecting seat 21 can be adaptively designed according to the actual processing scenario, so that the water-guided laser processing head can adapt to more processing scenarios (e.g., vertical processing, tilting processing, rotational processing, etc.). If the length of the upper connecting seat 21 is too long or too short, the water-guided laser processing head may interfere with other components on the equipment during the cutting operation. The spot of the parallel laser beam after being focused by the focusing lens 22 needs to enter the coupling component 3. The length of the lower connecting seat 23 depends on the focusing distance of the focusing lens 22 to ensure that the focused laser spot can smoothly enter the coupling component 3.

[0039] In this embodiment, the third connecting portion 213 is provided with a first stepped surface 2131, and an aperture 215 is provided on the first stepped surface 2131. A second light guide hole 2151 with adjustable aperture is opened at the center of the aperture 215, and the second light guide hole 2151 is connected to the first channel 212. The diameter of the second light guide hole 2151 is smaller than the diameter of the first channel 212. The aperture 215 can limit the diameter of the laser beam, block stray light from outside the beam, improve the beam quality of the incident focusing lens 22, and ensure the quality of the laser spot after focusing.

[0040] like Figure 6As shown, the mounting base 1 includes multiple mounting parts, which are integrally formed or spliced ​​together. The multiple mounting parts are: a first mounting part 13, a second mounting part 14, and a third mounting part 15. The first mounting part 13, the second mounting part 14, and the third mounting part 15 are internally connected. The third mounting part 15 is connected to the focusing lens assembly 2. A reflector is installed in the first mounting part 13, a semi-reflective lens is installed in the second mounting part 14, and a reflector is installed in the third mounting part 15. A visual monitoring assembly 4 is installed on the upper surface of the first mounting part 13, and a laser adjustable collimation assembly 5 is installed on the upper surface of the second mounting part 14. The laser emitted by the laser adjustable collimation assembly 5 is reflected by the semi-reflective lens in the second mounting part 14 to the reflector in the third mounting part 15, and then reflected by the reflector to the focusing lens 22. The laser spot, after being focused by the focusing lens 22, enters the coupling assembly 3. The light transmission path of the light source 41 emitted by the visual monitoring component 4 is as follows: the light emitted by the light source 41 is reflected by a reflector (inside the first mounting part 13) to a semi-reflective lens (inside the second mounting part 14), and after passing through the semi-reflective lens (inside the second mounting part 14), the light is reflected again by a reflector (inside the third mounting part 15) to the focusing lens assembly 2. The visual monitoring component 4 can monitor the coupling between the laser beam and the high-pressure water beam in real time. To facilitate the installation of the reflector / semi-reflective lens, a sealing plate 16 is provided on one side of the first mounting part 13, the second mounting part 14, and the third mounting part 15. By opening the sealing plate 16, the reflector / semi-reflective lens can be installed into the first mounting part 13, the second mounting part 14, and the third mounting part 15. After installation, the sealing plate 16 is then fixed.

[0041] Since water spray during processing may also seep into the mounting cavity 11, positive pressure gas is introduced from the first air inlet 211 and passes through the first channel 212 to fill the entire mounting cavity 11. This can prevent the reflectors and semi-reflective lenses inside the mounting cavity 11 from fogging and improve the transmission effect of laser signals.

[0042] In summary, the water-guided laser processing head of this utility model, through structural improvements to the focusing lens assembly 2, introduces positive pressure gas into the space above and below the focusing lens 22 through the first air inlet 211 and the second air inlet 230, respectively, preventing external water mist from entering the focusing lens assembly 2, thus preventing fogging of the focusing lens 22 and ensuring the laser focusing effect.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A water guide laser machining head having an anti-fog function, characterized by, include: The focusing lens assembly (2) includes: an upper connecting seat (21), a focusing lens (22) and a lower connecting seat (23), wherein the upper end of the focusing lens (22) is connected to the lower end of the upper connecting seat (21) and the lower end of the focusing lens (22) is connected to the lower connecting seat (23); The upper connecting seat (21) is provided with a first air inlet (211), through which positive pressure gas enters the space above the focusing lens (22) and fills the space above; the lower connecting seat (23) is provided with a second air inlet (230), through which positive pressure gas enters the space below the focusing lens (22) and fills the space below.

2. The water guide laser machining head having an anti-fog function according to claim 1, wherein The water-guided laser processing head further includes: a mounting base (1), the mounting base (1) having a mounting cavity (11) inside, the mounting base (1) being connected to the upper connecting base (21), and the mounting cavity (11) communicating with the interior of the upper connecting base (21) so that positive pressure gas can fill the mounting cavity (11).

3. The water guide laser machining head having an anti-fog function according to claim 2, wherein The upper connecting seat (21) has a first channel (212) inside, the first channel (212) is connected to the mounting cavity (11), and the first channel (212) is connected to the first air inlet (211).

4. The water guide laser machining head having an anti-fog function according to claim 1, wherein The lower connecting seat (23) includes: a first connecting part (231) and a second connecting part (232), the first connecting part (231) and the second connecting part (232) are fixedly connected, the first connecting part (231) is connected to the focusing lens (22), and the second connecting part (232) is connected to the coupling component (3).

5. The water guide laser machining head having an anti-fog function according to claim 4, wherein The lower connecting seat (23) and the coupling component (3) have a frustum chamber (6), and the first connecting part (231) and the second connecting part (232) are provided with a venting gap (233), and the frustum chamber (6) is connected to the venting gap (233).

6. The water guide laser machining head having an anti-fog function according to claim 2, wherein The mounting base (1) includes multiple mounting parts, which are integrally formed or spliced ​​together.

7. The water guide laser machining head having an anti-fog function according to claim 3, wherein The upper connecting seat (21) includes a third connecting part (213) and an upper connecting body (214), the third connecting part (213) and the upper connecting body (214) are fixedly connected, the third connecting part (213) is connected to the mounting seat (1), the upper connecting body (214) is connected to the focusing lens (22), and the first channel (212) is opened in the upper connecting body (214).

8. The water guide laser machining head having an anti-fog function according to claim 7, wherein The mounting base (1) is provided with a first light guide hole (12), the third connecting part (213) is connected to the edge of the first light guide hole (12), and the first channel (212) is connected to the mounting cavity (11) through the first light guide hole (12).

9. The water guide laser machining head having an anti-fog function according to claim 7, wherein The third connecting part (213) is provided with a first stepped surface (2131), and an aperture (215) is provided on the first stepped surface (2131). The aperture (215) has a second light guide hole (2151) with adjustable aperture at its center, and the second light guide hole (2151) is connected to the first channel (212).

10. The water guide laser machining head having an anti-fog function according to claim 6, wherein The plurality of mounting parts are: a first mounting part (13), a second mounting part (14) and a third mounting part (15), the first mounting part (13), the second mounting part (14) and the third mounting part (15) are internally connected, the third mounting part (15) is connected to the focusing lens assembly (2), a reflector is installed in the first mounting part (13), a semi-reflective lens is installed in the second mounting part (14), and a reflector is installed in the third mounting part (15).

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