Laser processing nozzles, laser processing heads and laser processing equipment

Abstract

This utility model relates to the field of laser processing technology, and discloses a laser processing nozzle, a laser processing head, and laser processing equipment. The laser processing nozzle includes a nozzle with a first combustion-supporting gas channel and at least two first auxiliary gas channels inside. The first combustion-supporting gas channel guides the combustion-supporting gas out of the combustion-supporting gas outlet. The first auxiliary gas channels are connected to the auxiliary gas outlet, and the auxiliary gas outlet is annularly disposed around the combustion-supporting gas outlet. At least one side wall of at least one of the first auxiliary gas channels has a protrusion. This utility model's nozzle, by improving the gas flow channel structure, effectively enhances the dynamic stability of the gas, thereby resulting in higher nozzle processing quality. It also extends the distance between the nozzle and the workpiece, ultimately extending the nozzle's service life.

Description

Technical Field

[0001] This utility model relates to the field of laser processing technology, and in particular to a laser processing nozzle, a laser processing head, and a laser processing equipment. Background Technology

[0002] In laser cutting, when the nozzle is positioned low, the safety clearance between it and the workpiece is significantly reduced. During the cutting process, even minor deviations in system operation and unevenness of the workpiece surface can easily cause collisions between the nozzle and the workpiece. These collisions cause direct mechanical damage to the nozzle, leading to deformation and severely affecting the uniformity and stability of the internal gas flow field, thus drastically shortening the nozzle's lifespan. Furthermore, during the laser piercing stage, a low nozzle height makes it highly susceptible to contamination by spatter. The deposition of spatter on the protective mirror surface forms uneven deposits, reducing the mirror's transmittance and causing attenuation of laser energy reaching the workpiece surface, thus impacting cutting efficiency and quality.

[0003] In summary, the two major problems of nozzle susceptibility to collision damage and protective mirror susceptibility to contamination by splattering material severely restrict the efficient and stable operation of laser cutting technology, becoming key factors hindering the improvement of cutting quality.

[0004] Therefore, there is an urgent need for a laser processing nozzle, laser processing head, and laser processing equipment to solve the above problems. Utility Model Content

[0005] Based on the above, the purpose of this utility model is to provide a laser processing nozzle, a laser processing head, and a laser processing equipment. By improving the gas flow channel structure, the dynamic stability of the gas is effectively improved, thereby resulting in higher nozzle processing quality. At the same time, the distance between the nozzle and the workpiece can be extended, which is beneficial to extending the service life of the nozzle overall.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Laser processing nozzles include:

[0008] The nozzle has a first combustion-supporting gas channel and at least two first auxiliary gas channels. The first combustion-supporting gas channel is used to guide the combustion-supporting gas to flow out of the combustion-supporting gas outlet. The first auxiliary gas channel is connected to the auxiliary gas outlet. The auxiliary gas outlet is arranged in a ring around the combustion-supporting gas outlet. The first auxiliary gas channel is used to guide the auxiliary gas to flow out of the auxiliary gas outlet. At least one side wall of at least one of the first auxiliary gas channels has a protrusion.

[0009] As a preferred embodiment of a laser processing nozzle, the first auxiliary gas channel is arranged around the first combustion-supporting gas channel, and the protrusion includes at least one annular protrusion extending circumferentially along the first combustion-supporting gas channel.

[0010] As a preferred embodiment of the nozzle for laser processing, there are two or more annular protrusions; the two or more annular protrusions are arranged continuously or at intervals along the axial direction of the first combustion-supporting gas channel.

[0011] As a preferred embodiment of a laser processing nozzle, there are two or more annular protrusions; the height of the two or more annular protrusions is the same, or the height of at least one annular protrusion is different.

[0012] As a preferred embodiment of a nozzle for laser processing, a mixing chamber is provided between the first auxiliary gas channel and the auxiliary gas outlet, and the first auxiliary gas channel is connected to the auxiliary gas outlet through the mixing chamber.

[0013] As a preferred embodiment of a nozzle for laser processing, the nozzle includes an inner layer, an outer layer, and an intermediate layer located between the inner layer and the outer layer. A first auxiliary gas channel is disposed in the inner layer, and a first auxiliary gas channel is formed between the inner layer and the intermediate layer, and between the intermediate layer and the outer layer.

[0014] As a preferred embodiment of a laser processing nozzle, the inner layer and the outer layer are connected through an intermediate layer, and the intermediate layer is detachably connected to the outer layer and / or the inner layer.

[0015] As a preferred embodiment of a nozzle for laser processing, there are two or more intermediate layers, and a first auxiliary gas channel is formed between adjacent intermediate layers.

[0016] As a preferred embodiment of a laser processing nozzle, the intermediate layers are detachably connected.

[0017] As a preferred embodiment of a laser processing nozzle, the laser processing nozzle is provided with a nozzle seat, the nozzle seat is provided with a second combustion-supporting gas channel and a second auxiliary gas channel, the second combustion-supporting gas channel is connected to the first combustion-supporting gas channel, and the second auxiliary gas channel is connected to the first auxiliary gas channel.

[0018] As a preferred embodiment of a laser processing nozzle, the nozzle holder is detachably connected to the nozzle.

[0019] As a preferred embodiment of a nozzle for laser processing, the second auxiliary gas channel is disposed on one side of the second combustion-supporting gas channel, the first auxiliary gas channel is disposed around the first combustion-supporting gas channel, and the nozzle seat is also provided with a gas equalization chamber, which is disposed around the second combustion-supporting gas channel, and the second auxiliary gas channel is connected to the first combustion-supporting gas channel through the gas equalization chamber.

[0020] Laser processing head, including the laser processing nozzle described in any of the above embodiments.

[0021] Laser processing equipment, including the laser processing nozzle or the laser processing head described in any of the above embodiments.

[0022] The beneficial effects of this utility model are as follows:

[0023] This invention features a first combustion-supporting gas channel in the nozzle, allowing the combustion-supporting gas to flow through and ignite the combustion-supporting gas outlet. An auxiliary gas outlet annularly positioned around the combustion-supporting gas outlet further confines the combustion-supporting gas within the annular flow, reducing dispersion. The presence of at least two first auxiliary gas channels, each connected to the auxiliary gas outlet, optimizes the flow characteristics of the auxiliary gas, enhances its confinement of the combustion-supporting gas, and effectively improves the dynamic stability of the processing gas. This extends the working distance between the laser processing nozzle and the workpiece, reducing the risk of collisions due to insufficient distance and minimizing damage to the laser processing nozzle from spatter. Furthermore, it enhances the slag-removing effect of the combustion-supporting gas, effectively reducing residue on the processed surface and significantly improving processing quality. To further increase the auxiliary gas flow rate, at least one sidewall of at least one first auxiliary gas channel is provided with a protrusion. By incorporating protrusions, the width of the first auxiliary gas channel is varied, utilizing the Laval effect to accelerate the gas flow rate. In summary, by improving the gas flow channel structure, the laser processing nozzle effectively enhances the dynamic stability of the gas, resulting in higher nozzle processing quality. Simultaneously, it allows for a longer distance between the nozzle and the workpiece during processing, which is beneficial for nozzle protection. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a laser processing nozzle provided in a specific embodiment of this utility model;

[0026] Figure 2 This is a cross-sectional view of the laser processing nozzle provided in a specific embodiment of this utility model;

[0027] Figure 3 This is a schematic diagram of the nozzle of the laser processing nozzle provided in a specific embodiment of the present invention;

[0028] Figure 4 This is a cross-sectional view of the nozzle of the laser processing nozzle provided in a specific embodiment of this utility model.

[0029] In the picture:

[0030] 100. Nozzle; 101. First combustion-supporting gas channel; 102. First auxiliary gas channel; 103. Mixing chamber; 110. Combustion-supporting gas outlet; 120. Auxiliary gas outlet; 130. Protrusion; 140. Inner layer; 150. Outer layer; 160. Intermediate layer; 161. Snap-fit ​​flange;

[0031] 200. Nozzle seat; 201. Second combustion-supporting gas channel; 202. Second auxiliary gas channel; 203. Gas distribution chamber; 210. Auxiliary gas inlet;

[0032] 300. Sealing ring. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0035] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] like Figures 1-4 As shown, this embodiment provides a laser processing nozzle, including a nozzle 100. The nozzle 100 is provided with a first combustion-supporting gas channel 101 and at least two first auxiliary gas channels 102. The first combustion-supporting gas channel 101 is used to guide the combustion-supporting gas to flow out of the combustion-supporting gas outlet 110. The first auxiliary gas channels 102 are connected to the auxiliary gas outlet 120. The auxiliary gas outlet 120 is arranged around the combustion-supporting gas outlet 110. The first auxiliary gas channels 102 are used to guide the auxiliary gas to flow out of the auxiliary gas outlet 120. At least one side wall of at least one first auxiliary gas channel 102 is provided with a protrusion 130.

[0039] This invention provides a first combustion-supporting gas channel 101 in the nozzle 100, allowing the combustion-supporting gas to flow through and ignite the combustion-supporting gas outlet 110. An auxiliary gas outlet 120 is provided annularly around the combustion-supporting gas outlet 110, allowing the auxiliary gas flowing out of the outlet 120 to confine the combustion-supporting gas within the annular flow, thus reducing dispersion. The provision of at least two first auxiliary gas channels 102, each connected to the auxiliary gas outlet 120, optimizes the flow characteristics of the auxiliary gas, enhances its confinement effect on the combustion-supporting gas, and effectively improves the dynamic stability of the processing gas. This extends the working distance between the laser processing nozzle and the workpiece, reducing the risk of collisions due to insufficient distance and minimizing damage to the laser processing nozzle from spatter. Furthermore, it enhances the slag-removing effect of the combustion-supporting gas, effectively reducing residue on the processed surface and significantly improving processing quality. To further increase the auxiliary gas flow rate, at least one sidewall of the first auxiliary gas channel 102 is provided with a protrusion 130. By providing the protrusion 130, the width of the first auxiliary gas channel 102 varies, forming a structure similar to a Laval channel, which accelerates the gas flow rate. In summary, by improving the gas flow channel structure, the laser processing nozzle effectively enhances the dynamic stability of the gas, resulting in higher processing quality from the nozzle 100. Simultaneously, it allows for extending the distance between the nozzle 100 and the workpiece during processing, ultimately contributing to a longer service life of the nozzle 100.

[0040] Specifically, the first auxiliary gas channel 102 is arranged in a ring around the first combustion-supporting gas channel 101, and the auxiliary gas from at least two first auxiliary gas channels 102 needs to be merged before flowing out of the auxiliary gas outlet 120. This requires the auxiliary gas to be diverted and merged through at least two first auxiliary gas channels 102 before finally flowing out of the auxiliary gas outlet 120. This increases the auxiliary gas flow rate and further optimizes the flow characteristics of the auxiliary gas, enhancing its constraint effect on the combustion-supporting gas and effectively improving the dynamic stability of the processing gas.

[0041] In this embodiment, the combustion-supporting gas can be, for example, oxygen or compressed air. The auxiliary gas can be, for example, nitrogen or compressed air. The auxiliary gas constrains the combustion-supporting gas, maintaining a certain cone angle and concentration over a longer distance, thereby optimizing the gas flow and increasing the distance between the nozzle 100 and the workpiece. The nozzle 100 is made of a high thermal conductivity material, such as copper and copper alloys, or silicon carbide.

[0042] Furthermore, the protrusion 130 includes at least one annular protrusion extending circumferentially along the first combustion-supporting gas channel 101. This arrangement allows the auxiliary gas to be accelerated at all points circumferentially along the first auxiliary gas channel 102, which helps to increase the uniformity of the auxiliary gas flow rate at all points circumferentially along the first auxiliary gas channel 102.

[0043] Optionally, two or more annular protrusions are provided, allowing the auxiliary gas to be accelerated multiple times in the flow direction, resulting in a better acceleration effect. For example, two or more annular protrusions are arranged continuously or at intervals along the axial direction of the first combustion-supporting gas channel 101. The protrusion heights of the two or more annular protrusions are all the same, or at least one annular protrusion has a different height. It is understood that the continuity or interval of the annular protrusions, as well as the specific height settings, are related to their acceleration effect. Those skilled in the art can set the annular protrusions according to actual needs, and no specific limitations are made here.

[0044] As an optional solution for a laser processing nozzle, the laser processing nozzle is provided with a nozzle holder 200, which has a second combustion-supporting gas channel 201 and a second auxiliary gas channel 202. The second combustion-supporting gas channel 201 is connected to the first combustion-supporting gas channel 101, and the second auxiliary gas channel 202 is connected to the first auxiliary gas channel 102. By providing the nozzle holder 200, a longer flow path is provided for the combustion-supporting gas and the auxiliary gas, which helps to improve the uniformity and stability of the gas flow field. Optionally, the nozzle holder 200 is made of high thermal conductivity materials such as copper and copper alloys, or silicon carbide.

[0045] For example, the nozzle 100 and the nozzle seat 200 are detachably connected. It is worth noting that different nozzles 100 and nozzle seats 200 have different design parameters, such as the height of the nozzle seat 200 and the channel width, so that those skilled in the art can flexibly adjust the nozzle 100 and nozzle seat 200 according to the processing requirements of different materials and thicknesses to meet the diverse requirements of industrial-grade processing.

[0046] In this embodiment, the nozzle 100 includes an inner layer 140, an outer layer 150, and an intermediate layer 160 located between the inner layer 140 and the outer layer 150. A first combustion-supporting gas channel 101 is disposed in the inner layer 140, and a first auxiliary gas channel 102 is formed between the inner layer 140 and the intermediate layer 160, and between the intermediate layer 160 and the outer layer 150. By forming corresponding gas channels between the inner layer 140, the intermediate layer 160, and the outer layer 150, the problem of cross-mixing between gas channels can be effectively avoided, ensuring the reliability of each gas channel in guiding the corresponding gas. In addition, by setting the nozzle 100 in separate parts, the multi-layer structure is more conducive to supporting modular customization. Since each module of the different internal layer structure of the nozzle 100 can be designed, manufactured, and optimized separately, those skilled in the art can optimize the configuration according to different processing requirements (such as material type, thickness, cutting speed, etc.) and application scenarios to select and combine different modules. For example, when cutting thick steel plates, a module suitable for high-pressure airflow can be used; when cutting thin metals, a low-pressure module can be selected, providing a more efficient and reliable solution for laser cutting technology. For instance, the inner layer 140, the middle layer 160, and the outer layer 150 can all be manufactured using machining or 3D printing processes.

[0047] Optionally, two or more intermediate layers 160 are provided, and a first auxiliary gas channel 102 is formed between adjacent intermediate layers 160. By providing two or more intermediate layers 160, the number of first auxiliary gas channels 102 is increased, resulting in a higher degree of auxiliary gas diversion. At the same time, the parameters of each first auxiliary gas channel 102 can be designed independently, further improving the adaptability of the laser processing nozzle to various scenarios.

[0048] Preferably, the intermediate layers 160 are detachably connected, which further improves the modularity of the laser processing nozzle and adapts to more application scenarios.

[0049] Specifically, to assemble the nozzle 100, the inner layer 140 and the outer layer 150 are connected by an intermediate layer 160. The intermediate layer 160 is detachably connected to the outer layer 150 and / or the inner layer 140. This detachable connection facilitates replacement of the intermediate layer 160 as needed, resulting in greater flexibility. In this embodiment, the intermediate layer 160 is detachably connected to the outer layer 150. The intermediate layer 160 is provided with a snap-fit ​​flange 161, which snaps into the outer layer 150. Simultaneously, a flow channel is formed between adjacent snap-fit ​​flanges 161. This flow channel communicates with the first auxiliary gas channels 102 on both the inner and outer sides of the intermediate layer 160, thereby ensuring that the first auxiliary gas channels 102 on both the inner and outer sides of the intermediate layer 160 are connected to the gas equalization chamber 203.

[0050] Furthermore, to facilitate the installation between the nozzle 100 and the nozzle holder 200, the intermediate layer 160 is detachably connected to the outer layer 150, the inner layer 140 is detachably connected to the inner wall of the second auxiliary gas channel 202, and the outer layer 150 is detachably connected to the outer wall of the nozzle holder 200. By making the inner layer 140, intermediate layer 160, and outer layer 150 all detachably connected, the nozzle 100 can be adapted to different nozzle holders 200, thereby enabling its interchangeability with different laser processing heads.

[0051] It is worth noting that, compared to the intermediate layer 160, the inner layer 140 and outer layer 150 need to be adapted to different nozzle seats 200, thus requiring certain design specifications. The intermediate layer 160, however, only needs to mate with the outer layer 150, allowing for greater design flexibility. Optionally, the inner layer 140 is threaded to the inner wall of the second combustion-supporting gas channel 201, and the outer layer 150 is threaded to the outer wall of the nozzle seat 200. Preferably, a sealing ring 300 is also provided between the outer layer 150 and the nozzle seat 200 to improve the sealing at their connection.

[0052] Furthermore, the second auxiliary gas channel 202 is disposed on one side of the second combustion-supporting gas channel 201, and the nozzle seat 200 is also provided with a gas equalization chamber 203, which is arranged around the second combustion-supporting gas channel 201. By providing the gas equalization chamber 203, the second combustion-supporting gas channel 201 can be simultaneously connected to two or more first combustion-supporting gas channels 101. At the same time, the second auxiliary gas channel 202 can be disposed on one side of the second combustion-supporting gas channel 201, and an auxiliary gas inlet 210 is formed at the end of the nozzle seat 200 away from the nozzle 100, which helps to simplify the structure of the nozzle seat 200 and facilitates the connection between the nozzle seat 200 and the combustion-supporting gas supply unit.

[0053] As an optional solution for a laser processing nozzle, in order to achieve the merging of auxiliary gases in at least two first auxiliary gas channels 102, a mixing chamber 103 is provided between the first auxiliary gas channels 102 and the auxiliary gas outlet 120. By providing the mixing chamber 103 and configuring it to be connected to both the two or more first auxiliary gas channels 102 and the auxiliary gas outlet 120, the merging of the auxiliary gases diverted by the two or more first auxiliary gas channels 102 is achieved, making the flow characteristics of the auxiliary gas flowing out of the auxiliary gas outlet 120 more stable.

[0054] In other embodiments, to achieve the merging of auxiliary gases in at least two first auxiliary gas channels 102, the auxiliary gas outlet 120 extends along the axial direction of the first combustion-supporting gas channel 101 by a predetermined length to provide sufficient space for the merging of auxiliary gases. The predetermined length can be obtained experimentally and is not specifically limited here.

[0055] It is worth noting that in this embodiment, an intermediate layer 160 is provided, and a protrusion is provided on the side of the intermediate layer 160 near the outer side; and the length of the intermediate layer 160 is relatively short, so as to form a mixing chamber 103 before the auxiliary gas outlet 120; at the same time, the auxiliary gas outlet 120 formed by the inner layer 140 and the outer layer 150 extends a predetermined length along the axis of the first combustion-supporting gas channel 101, so that the auxiliary gas in at least two first auxiliary gas channels 102 is mixed more fully, effectively improving the dynamic stability of the gas and thus making the nozzle 100 process with higher quality. At the same time, it can extend the distance between the nozzle 100 and the workpiece during processing, which is generally beneficial to extending the service life of the nozzle 100.

[0056] This embodiment also discloses a laser processing head, including a laser processing nozzle as described in any of the above embodiments, and further including a laser generating unit and a protective mirror unit. The laser processing head equipped with the above-mentioned laser processing head can provide a stable airflow during laser processing, thereby generating a strong and continuous blowing force to ensure that the molten slag generated during cutting is completely removed, effectively reducing residues on the processed surface and significantly improving processing quality. Simultaneously, the laser processing nozzle can raise the distance between itself and the workpiece during processing, reducing the risk of collision between the nozzle 100 and the workpiece and significantly extending the service life of the nozzle 100. Furthermore, the larger distance significantly reduces the probability of contamination of the protective mirror unit and other components by processing spatter, extending the replacement cycle of the protective mirror unit. These advantages reduce downtime caused by replacing the nozzle 100 and the protective mirror unit, thereby significantly improving the overall efficiency of laser processing.

[0057] This embodiment also discloses a laser processing apparatus, including a laser processing nozzle or a laser processing head as described in any of the above embodiments. The laser processing apparatus equipped with the aforementioned laser processing head can provide a stable airflow during processing, significantly improving processing quality. The nozzle 100 has a longer service life, while greatly reducing the likelihood of contamination of the protective mirror unit, thus reducing the frequency of nozzle 100 replacement and the cleaning and replacement of the protective mirror unit, directly lowering consumable costs, and consequently significantly reducing overall production costs.

[0058] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A nozzle for laser processing, characterized in that, include: A nozzle (100) is provided with a first combustion-supporting gas channel (101) and at least two first auxiliary gas channels (102). The first combustion-supporting gas channel (101) is used to guide the combustion-supporting gas out of the combustion-supporting gas outlet (110). The first auxiliary gas channel (102) is connected to the auxiliary gas outlet (120). The auxiliary gas outlet (120) is arranged around the combustion-supporting gas outlet (110). The first auxiliary gas channel (102) is used to guide the auxiliary gas out of the auxiliary gas outlet (120). At least one side wall of at least one of the first auxiliary gas channels (102) is provided with a protrusion (130).

2. The laser processing nozzle according to claim 1, characterized in that, The first auxiliary gas channel (102) is arranged around the first combustion-supporting gas channel (101), and the protrusion (130) includes at least one annular protrusion extending circumferentially along the first combustion-supporting gas channel (101).

3. The laser processing nozzle according to claim 2, characterized in that, There are two or more annular protrusions; the two or more annular protrusions are arranged continuously or at intervals along the axial direction of the first combustion-supporting gas channel (101).

4. The laser processing nozzle according to claim 2, characterized in that, There are two or more annular protrusions; the height of the two or more annular protrusions is the same, or the height of at least one annular protrusion is different.

5. The laser processing nozzle according to claim 1, characterized in that, A mixing chamber (103) is provided between the first auxiliary gas channel (102) and the auxiliary gas outlet (120), and the first auxiliary gas channel (102) is connected to the auxiliary gas outlet (120) through the mixing chamber (103).

6. The laser processing nozzle according to claim 1, characterized in that, The nozzle (100) includes an inner layer (140), an outer layer (150), and an intermediate layer (160) located between the inner layer (140) and the outer layer (150). The first combustion-supporting gas channel (101) is disposed in the inner layer (140). The first auxiliary gas channel (102) is formed between the inner layer (140) and the intermediate layer (160), and between the intermediate layer (160) and the outer layer (150).

7. The laser processing nozzle according to claim 6, characterized in that, The inner layer (140) and the outer layer (150) are connected through the intermediate layer (160), and the intermediate layer (160) is detachably connected to the outer layer (150) and / or the inner layer (140).

8. The laser processing nozzle according to claim 6, characterized in that, There are two or more intermediate layers (160), and the first auxiliary gas channel (102) is formed between two adjacent intermediate layers (160).

9. The laser processing nozzle according to claim 8, characterized in that, The intermediate layers (160) are detachably connected.

10. The laser processing nozzle according to claim 1, characterized in that, The laser processing nozzle is provided with a nozzle seat (200), the nozzle seat (200) is provided with a second combustion-supporting gas channel (201) and a second auxiliary gas channel (202), the second combustion-supporting gas channel (201) is connected to the first combustion-supporting gas channel (101), and the second auxiliary gas channel (202) is connected to the first auxiliary gas channel (102).

11. The laser processing nozzle according to claim 10, characterized in that, The nozzle seat (200) is detachably connected to the nozzle (100).

12. The laser processing nozzle according to claim 10, characterized in that, The second auxiliary gas channel (202) is disposed on one side of the second combustion-supporting gas channel (201), the first auxiliary gas channel (102) is arranged around the first combustion-supporting gas channel (101), the nozzle seat (200) is also provided with a gas equalization chamber (203), the gas equalization chamber (203) is arranged around the second combustion-supporting gas channel (201), and the second auxiliary gas channel (202) is connected to the first auxiliary gas channel (102) through the gas equalization chamber (203).

13. A laser processing head, characterized in that, Including the laser processing nozzle as described in any one of claims 1-12.

14. A laser processing equipment, characterized in that, Includes the laser processing nozzle as described in any one of claims 1-12 or the laser processing head as described in claim 13.

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