Device for improving water jet stability and water-guided laser device

Abstract

The present invention provides a device for improving the stability of a water jet and a water-guided laser device, relating to the technical field of water-guided laser processing equipment. The device for improving the stability of the water jet includes a coupling head and a nozzle; the nozzle is arranged in the mounting hole of the coupling head, and one end of the nozzle protrudes from the coupling head; there is an annular gap between the front end of the nozzle and the coupling head, and the rear end of the nozzle is hermetically connected to the coupling head; an air vent passage is formed on the housing of the coupling head, and the air vent passage communicates with the annular gap; a convex ring is arranged at the front end of the nozzle, and the convex ring is located outside the mounting hole. The water-guided laser device includes the device for improving the stability of the water jet. The technical effect of avoiding the influence of water droplets on the stability of the laser water jet is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of water-guided laser processing equipment, and more particularly, to a device for improving the stability of a water jet and a water-guided laser device. Background Art

[0002] Water-guided laser processing technology is based on the principle of total internal reflection, which can generate a laser beam completely contained in a water jet. The laser beam is reflected at the air-water interface of a medium with a lower density. The laser beam propagates from the nozzle along a micron-level water beam to the surface of the workpiece, and the laser is used to ablate the workpiece; water can be used to cool the cutting area and wash away the laser ablation debris in a timely manner. In conventional laser processing technology, the heat conduction effect of the laser will generate an extremely high temperature gradient, resulting in the formation of a heat-affected zone in the processing area, causing cracks in the workpiece and accompanied by slag, affecting the quality of micro-machined workpieces, and even seriously reducing the mechanical properties of the processed materials. Compared with traditional laser direct ablation removal, water-guided laser processing has less heat accumulation and burrs, the surface of the processing area is smoother, and the working distance of water-guided laser processing technology is larger. The laser undergoes total internal reflection in a stable water jet column section and does not need to be focused at the focal position for processing. The laser is coupled with the water jet to form a light-guided water jet with a high energy density, which will carry away the molten material during the cutting process, reducing the residue of the processed material, without a heat-affected zone and circumferential burrs, and the processing quality is uniform, suitable for cutting complex surfaces and multi-layer materials.

[0003] However, after the laser water jet acts on the workpiece, water droplets will splash back onto the lower surface of the coupling head. After the water droplets accumulate, they will fall, affecting the stability of the laser water jet. Summary of the Invention

[0004] The purpose of the present invention is to provide a device for improving the stability of a water jet and a water-guided laser device to alleviate the technical problem that the stability of the laser water jet is affected in the prior art.

[0005] In a first aspect, an embodiment of the present invention provides a device for improving the stability of a water jet, including a coupling head and a nozzle;

[0006] The nozzle is arranged in the mounting hole of the coupling head, and one end of the nozzle protrudes from the coupling head;

[0007] There is an annular gap between the front end of the nozzle and the coupling head, and the rear end of the nozzle is hermetically connected to the coupling head;

[0008] An air vent passage is provided on the housing of the coupling head, and the air vent passage is communicated with the annular gap;

[0009] A convex ring is provided at the front end of the nozzle, and the convex ring is located outside the mounting hole.

[0010] In combination with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect. Wherein, a convex ring is provided at the front end of the above-mentioned nozzle, and the convex ring is located outside the mounting hole.

[0011] In combination with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect. Wherein, the above-mentioned ventilation channel includes a straight channel and an annular channel;

[0012] The straight channel runs through the housing of the coupling head, and the annular channel is opened in the mounting hole.

[0013] In combination with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect. Wherein, the above-mentioned annular channel adopts an annular groove.

[0014] In combination with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect. Wherein, a plurality of exhaust holes are opened on the above-mentioned annular channel.

[0015] In combination with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect. Wherein, the above-mentioned nozzle includes a large-diameter part, a transition section and a small-diameter part, the large-diameter part, the transition section and the small-diameter part are connected in sequence, and the transition section corresponds to the ventilation channel;

[0016] The convex ring is arranged on the small-diameter part.

[0017] In combination with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect. Wherein, an arc transition part is provided at the connection between the side of the convex ring close to the transition section and the small-diameter part.

[0018] In combination with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect. Wherein, the edge of the above-mentioned mounting hole is a right-angle edge.

[0019] In combination with the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect. Wherein, an air inlet joint is provided on the outer wall of the above-mentioned coupling head at the ventilation channel.

[0020] In the second aspect, an embodiment of the present invention provides a water-guided laser device, including the device for improving the stability of the water jet.

[0021] Beneficial effects:

[0022] The present invention provides a device for improving the stability of a water jet, comprising a coupling head and a nozzle; the nozzle is disposed within the mounting hole of the coupling head, and one end of the nozzle protrudes from the coupling head; there is an annular gap between the front end of the nozzle and the coupling head, and the rear end of the nozzle is sealingly connected to the coupling head; an air vent passage is formed in the housing of the coupling head, and the air vent passage communicates with the annular gap; a convex ring is provided at the front end of the nozzle, and the convex ring is located outside the mounting hole.

[0023] Specifically, during the working process, the protective gas pipeline is connected to the air vent passage on the coupling head, so that the protective gas enters the air vent passage, then the protective gas flows along the air vent passage into the annular gap, and then the protective gas flows downward along the annular gap, so that the protective gas can impact the convex ring at the front end of the nozzle when flowing downward, and then the gas is ejected in all directions, thereby washing away the water droplets accumulated on the lower surface of the coupling head outward, preventing the water droplets from dripping onto the workpiece or contacting the water jet, and reducing the influence on the stability of the laser water jet.

[0024] The present invention provides a water-guided laser device, comprising the device for improving the stability of the water jet. The water-guided laser device has the above advantages compared with the prior art, which will not be elaborated here. Description of the Drawings

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic structural diagram of the device for improving the stability of the water jet provided by the embodiment of the present invention.

[0027] Reference Signs:

[0028] 100 - coupling head; 110 - mounting hole; 120 - annular gap;

[0029] 200 - nozzle; 210 - large-diameter part; 220 - transition section; 230 - small-diameter part; 240 - arc transition part;

[0030] 300 - air vent passage;

[0031] 400 - convex ring;

[0032] 500 - workpiece;

[0033] 600 - water droplet. Detailed Embodiments

[0034] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] In the description of the present invention, 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", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0037] In the present invention, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0039] See Figure 1As shown in the figure, this embodiment provides a device for improving the stability of a water jet, including a coupling head 100 and a nozzle 200; the nozzle 200 is arranged in the mounting hole 110 of the coupling head 100, and one end of the nozzle 200 protrudes from the coupling head 100; there is an annular gap 120 between the front end of the nozzle 200 and the coupling head 100, and the rear end of the nozzle 200 is hermetically connected to the coupling head 100; an air vent passage 300 is formed on the housing of the coupling head 100, and the air vent passage 300 communicates with the annular gap 120; a convex ring 400 is arranged at the front end of the nozzle 200, and the convex ring 400 is located outside the mounting hole 110.

[0040] Specifically, during the working process, the protective gas pipeline is connected to the air vent passage 300 on the coupling head 100, so that the protective gas enters the air vent passage 300, then the protective gas flows into the annular gap 120 along the air vent passage 300, and then the protective gas flows downward along the annular gap 120. When the protective gas flows downward, it will hit the convex ring 400 at the front end of the nozzle 200, and then the gas jets out in all directions, so as to wash away the water droplets 600 accumulated on the lower surface of the coupling head 100 outward, preventing the water droplets 600 from falling onto the workpiece 500 or contacting the water jet, and reducing the influence on the stability of the laser water jet.

[0041] Among them, through the setting of the convex ring 400, the protective gas discharged from the annular gap 120 can be better dispersed, so that more protective gas jets out in all directions, improving the efficiency of removing water droplets 600.

[0042] It should be noted that an air inlet joint is arranged on the outer wall of the coupling head 100 at the position of the air vent passage 300, so as to facilitate the staff to connect the protective gas supply pipeline and the coupling head 100.

[0043] See Figure 1 As shown in the figure, in an alternative solution of this embodiment, the air vent passage 300 includes a straight passage and an annular passage; the straight passage penetrates through the housing of the coupling head 100, and the annular passage is formed in the mounting hole 110.

[0044] Among them, the annular passage can adopt an annular groove, so that the protective gas in the straight passage can better fill the entire annular gap 120.

[0045] In addition, the annular passage can be formed in the inner wall of the coupling head 100 in the form of a closed passage, and then a plurality of exhaust holes are formed in the annular passage. The protective gas in the straight passage first enters the annular passage, and then injects gas into the annular gap 120 from the plurality of exhaust holes in the annular passage, so that the gas can better fill the entire annular gap 120.

[0046] See Figure 1As shown, in an alternative solution of this embodiment, the nozzle 200 includes a large-diameter portion 210, a transition section 220, and a small-diameter portion 230. The large-diameter portion 210, the transition section 220, and the small-diameter portion 230 are connected in sequence, and the transition section 220 corresponds to the ventilation channel 300; the convex ring 400 is provided on the small-diameter portion 230.

[0047] Wherein, an arc transition portion 240 is provided at the connection between the side of the convex ring 400 close to the transition section 220 and the small-diameter portion 230.

[0048] Wherein, the edge of the mounting hole 110 is a right-angle edge.

[0049] Specifically, the edge of the mounting hole 110 is set as a right-angle edge without chamfering, so that the protective gas discharged from the mounting hole 110 can vertically impact the convex ring 400 downward, avoiding the direct discharge of the gas and being unable to purge the lower surface of the coupling head 100. Then, the protective gas impacting the convex ring 400 can recoil and most of it can be purged horizontally around, so as to blow away the water droplets 600 on the lower surface of the sweeping coupling head 100.

[0050] This embodiment provides a water-guided laser device, including a device for improving the stability of the water jet.

[0051] Specifically, the water-guided laser device provided in this embodiment has the advantages of the above-mentioned device for improving the stability of the water jet compared with the prior art, which will not be elaborated here.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for improving the stability of a water jet, characterized in that, Comprising: A coupling head (100) and a spray head (200); The spray head (200) is arranged in the mounting hole (110) of the coupling head (100), and one end of the spray head (200) protrudes from the coupling head (100); There is an annular gap (120) between the front end of the spray head (200) and the coupling head (100), and the rear end of the spray head (200) is hermetically connected to the coupling head (100); An air vent passage (300) is formed in the housing of the coupling head (100), and the air vent passage (300) communicates with the annular gap (120); A convex ring (400) is arranged at the front end of the spray head (200), and the convex ring (400) is located outside the mounting hole (110); Water flow and laser can be ejected through the spray head (200); The air vent passage (300) includes a straight passage and an annular passage; the straight passage penetrates through the housing of the coupling head (100), and the annular passage is formed in the mounting hole (110); The protective gas pipeline is connected to the air vent passage (300) on the coupling head (100) so that the protective gas can enter the air vent passage (300). The protective gas can flow into the annular gap (120) along the air vent passage (300). When the protective gas flows downward along the annular gap (120), it can hit the convex ring (400) at the front end of the spray head (200), causing the protective gas to spray out in all directions and wash away the water droplets accumulated on the lower surface of the coupling head (100) outward.

2. The device for improving the stability of the water jet according to claim 1, characterized in that, The annular passage is in the form of an annular groove.

3. The device for improving the stability of the water jet according to claim 1, wherein, A plurality of exhaust holes are formed in the annular passage.

4. The device for improving the stability of a water jet according to claim 1, wherein, The spray head (200) includes a large-diameter portion (210), a transition section (220), and a small-diameter portion (230). The large-diameter portion (210), the transition section (220), and the small-diameter portion (230) are connected in sequence, and the transition section (220) corresponds to the air vent passage (300); The convex ring (400) is arranged on the small-diameter portion (230).

5. The device for improving the stability of the water jet according to claim 4, characterized in that, An arc transition portion (240) is arranged at the connection between the side of the convex ring (400) close to the transition section (220) and the small-diameter portion (230).

6. The device for improving the stability of the water jet according to any one of claims 1-5, characterized in that, The edge of the mounting hole (110) is a right-angle edge.

7. The device for improving the stability of the water jet according to any one of claims 1-5, characterized in that, An air inlet joint is arranged on the outer wall of the coupling head (100) at the position of the air vent passage (300).

8. A water-guided laser device, characterized in that, Comprising the device for improving the stability of water jet according to any one of claims 1-7.

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