A laser cutting head protection mechanism

Abstract

This utility model relates to a protective mechanism for a laser cutting head, comprising a suspended mounting base and a laser cutting head. The suspended mounting base is connected to the laser cutting head via a lower extension connector. An air guide ring pipe, mounted on the suspended mounting base and defining an annular airflow channel, is sleeved on the outer side of the lower extension connector. An inner diameter ring plate and an outer diameter ring plate are connected to the lower surface of the air guide ring pipe, thereby forming an annular exhaust port capable of directional airflow output. An isobaric exhaust assembly capable of equivalently discharging a cylindrical airflow is also provided on the lower surface of the air guide ring pipe, and an air supply assembly for supplying pressurized airflow is connected to the side of the air guide ring pipe. This utility model forms a protective structure outside the laser cutting head that utilizes directional airflow to accelerate the transfer of working heat dissipated from the surface of the laser cutting head, thus preventing heat accumulation within the protective structure.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary structure technology for laser cutting, and in particular to a laser cutting head protection mechanism. Background Technology

[0002] Laser cutting, as a mature thermal cutting method, utilizes a focused, high-power-density laser beam to irradiate the workpiece, causing the irradiated material to rapidly melt, vaporize, and ablate, thus eliminating material from the irradiated area. As the relative position of the beam and the workpiece moves, a kerf is eventually formed, achieving the cutting purpose and separating the workpiece. A laser cutting machine transmits the laser emitted from a laser source through an optical path system, and then focuses it into a high-power-density laser beam through optical components within the cutting head, thereby irradiating the cutting point. Laser cutting uses an invisible laser beam instead of a traditional mechanical blade, offering advantages such as high precision, fast cutting speed, cutting paths not limited by the cutting pattern, smooth cuts, and low processing costs.

[0003] The laser cutting head is the core component of a laser cutting machine. It is a laser output device consisting of a nozzle, a focusing lens, and a focusing and tracking system. Currently, most laser cutting equipment has its laser cutting head completely exposed without any protective components, making it highly susceptible to damage from collisions with warped steel workpieces. Therefore, some laser cutting machine products have begun to incorporate protective structures to ensure safety during operation. For example, the laser cutting head protective device disclosed in patent document CN220739864U includes a laser cutting head body, a protective cover, a positioning ring, an arc-shaped anti-collision plate, and an arc-shaped clamping plate. The protective cover is located on the outside of the laser cutting head body, and the positioning ring is located on the outside of the laser cutting head body above the protective cover. The bottom end of the positioning ring is fixedly connected to the top end of the protective cover. The positioning ring has equally spaced threaded holes inside each of the threaded holes, and a threaded rod passes through each threaded hole, threadedly connected to the threaded hole. One end of the threaded rod extends to the inside of the positioning ring. The arc-shaped clamping plate is located inside the positioning ring at the position of the threaded rod, and is rotatably connected to one end of the threaded rod. The arc-shaped anti-collision plates are all located on the outside of the protective cover. Although the prior art, as described in the aforementioned patent, has a heat dissipation cavity connecting the laser cutting head to the external space and heat dissipation holes that allow heat to diffuse outwards to dissipate heat from the laser welding head when constructing the protective structure, the protective structure still obstructs the welding cutting head to a certain extent compared to the original state where the laser cutting head without a protective structure is directly and completely exposed to the external environment. This limits the diffusion speed and efficiency of the heat escaping from its surface, resulting in a worse actual heat dissipation effect than when there is no protective structure. The difficulty of heat dissipation increases, the heat dissipation effect is reduced, and long-term use will shorten the service life of the laser cutting head. Utility Model Content

[0004] The purpose of this invention is to provide a laser cutting head protection mechanism that forms a directional airflow outside the laser cutting head to accelerate the transfer of working heat escaping from the laser cutting head surface, thus preventing heat accumulation within the protective structure. This addresses the problem that existing laser cutting head protection devices typically form a shielding structure outside the laser cutting head, affecting the transfer of working heat. This leads to heat accumulation within the protective cavity formed by the shielding structure, causing an increase in the working environment temperature of the laser cutting head and shortening its service life. Furthermore, the protective structure creates a stable cavity environment outside the laser cutting head, causing smoke and dust generated during the cutting process to come into contact with the surface of the laser cutting head during their ascent, resulting in shielding and fuming damage to optical components such as lenses, affecting the cleanliness of the optical path and the laser focusing effect.

[0005] The technical solution adopted by this utility model is as follows: a laser cutting head protection mechanism, including a suspended mounting base and a laser cutting head. The suspended mounting base is connected to the laser cutting head through a lower extension connecting seat. A gas guide ring pipe, which is mounted on the suspended mounting base and defines an annular airflow channel, is also sleeved on the outer side of the lower extension connecting seat. An inner diameter ring plate and an outer diameter ring plate are connected to the lower surface of the gas guide ring pipe, so that the inner diameter ring plate and the outer diameter ring plate cooperate to form an annular exhaust port that can directionally output airflow. An isobaric exhaust component that can equivalently discharge an annular columnar airflow is also provided on the lower surface of the gas guide ring pipe. Furthermore, an air supply component that supplies pressurized airflow to the side of the gas guide ring pipe is also connected.

[0006] According to a preferred embodiment, an annular opening that can be blocked by the equal pressure exhaust assembly is provided on the bottom surface of the air guide ring pipe, and a flange is also provided on the top edge of the air guide ring pipe; a connecting pipe port that communicates with its cavity and is connected to the air supply assembly is inserted into the side of the air guide ring pipe.

[0007] According to a preferred embodiment, the isobaric exhaust assembly includes a sealing ring plate, an elastic limiting member, a hollow support ring mesh, and an auxiliary guide member. The hollow support ring mesh is horizontally installed between the inner diameter ring plate and the outer diameter ring plate, and is connected to the sealing ring plate via elastic limiting members supported at the intersections of its mesh, thereby pressurizing the sealing ring plate against the bottom surface of the air guide ring tube to block the annular opening. An auxiliary guide member, capable of limiting its movement direction and inserted into the air guide ring tube, is connected to the upper surface of the sealing ring plate.

[0008] According to a preferred embodiment, a sealing gasket is provided on the top surface of the sealing ring plate to seal the opening of the annular surface.

[0009] According to a preferred embodiment, the elastic limiting member includes an insert post supported at the grid intersection of the hollow support ring, a sleeve body connected to the bottom surface of the sealing ring plate, and a column airbag disposed in the sleeve body.

[0010] According to a preferred embodiment, one end of the plug-in post inserted into the sleeve body is provided with an anti-detachment sliding plate, and the open end of the sleeve body is also provided with an anti-detachment baffle.

[0011] According to a preferred embodiment, the auxiliary guide includes square guide pins that are connected to the sealing ring plate and are circumferentially spaced, and a guide tube that is fitted onto the upper axial section of the square guide pin and connected to the inner top surface of the air guide ring pipe.

[0012] According to a preferred embodiment, a converging annular vertical plate is further provided at the lower edge of the outer diameter annular plate.

[0013] According to a preferred embodiment, the air supply assembly includes a pressurized air pump mounted on a suspended mounting base plate and an air supply pipeline connected to the exhaust port of the pressurized air pump, wherein the air outlet of the air supply pipeline is connected to the connecting pipe outlet.

[0014] According to a preferred embodiment, the lower extension connector includes a seat body and a connecting rod defining the installation height of the seat body.

[0015] The beneficial effects of this utility model are:

[0016] The air guide ring, inner diameter ring plate, outer diameter ring plate, annular exhaust port, and isobaric exhaust assembly configured in this application can work together to define the annular gap flow channel. This allows the pressurized airflow supplied by the air supply assembly to transfer heat from the annular gap between the protective structure formed by the outer diameter ring plate and the laser cutting head in a directional flow around the surface of the laser cutting head. This solves the defect of existing protective structures that restrict heat dissipation of the laser cutting head, resulting in heat accumulation in the outer area of ​​the laser cutting head. This effectively reduces the operating temperature of the laser cutting head, prevents overheating damage, improves the efficiency and durability of continuous operation, and extends its service life. The annular gap flow channel configured in this application can also purge and transfer the fumes and dust generated during the cutting process, effectively adjusting the direction of movement of the fumes and dust, preventing the fumes and dust from rising naturally and damaging the optical components of the laser cutting head, and improving the working stability and lifespan of the optical components.

[0017] The converging annular vertical plate of this application forms a protective sleeve structure that fits over the laser cutting head. This prevents the laser cutting head from being damaged by impact during the cutting process, effectively protecting it. Furthermore, it defines the annular cavity flow channel, guiding and limiting the output pressurized airflow. This forces the airflow to exit directionally from the annular cavity gap between the converging annular vertical plate and the laser cutting head, ensuring sufficient contact between the airflow and the laser cutting head surface. This accelerates the transfer of heat dissipated from the laser cutting head surface, improving its heat dissipation efficiency, reducing its surface temperature, and preventing heat accumulation on the laser cutting head surface. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a preferred laser cutting head protection mechanism proposed in this utility model;

[0019] Figure 2 This is a partial cross-sectional schematic diagram of a preferred laser cutting head protection mechanism proposed in this utility model;

[0020] Figure 3 This is a partial cross-sectional schematic diagram of a preferred laser cutting head protection mechanism proposed in this utility model when the exhaust is being conducted;

[0021] Figure 4 This is a partially enlarged cross-sectional schematic diagram of the isobaric exhaust structure of a preferred laser cutting head protection mechanism proposed in this utility model.

[0022] List of reference numerals

[0023] 1: Suspended mounting base; 2: Lower extension connecting seat; 3: Laser cutting head; 4: Air guide ring pipe; 5: Inner diameter ring plate; 6: Outer diameter ring plate; 7: Annular exhaust port; 8: Isobaric exhaust assembly; 9: Air supply assembly; 21: Seat body; 22: Connecting rod; 41: Annular opening; 42: Flange; 43: Connecting pipe port; 61: Converging annular vertical plate; 62: Buffer pad; 81: Sealing ring plate; 82: Elastic limiting component; 83: Hollowed-out support ring net; 84: Auxiliary guide component; 811: Sealing gasket; 821: Insert post; 822: Set cylinder; 823: Column airbag; 824: Anti-detachment sliding plate; 825: Anti-detachment baffle; 841: Square guide insert post; 842: Guide square cylinder; 91: Pressurized air pump; 92: Air supply pipeline. Detailed Implementation

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] The technical solutions provided by this utility model will be described in detail below with reference to the accompanying drawings and through embodiments. It should be noted that the descriptions of these embodiments are for the purpose of helping to understand this utility model, but do not constitute a limitation thereof. In some examples, because some implementation methods belong to existing or conventional technology, they are not described or are not described in detail. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and do not have any sequential or technical meaning.

[0026] The following is a detailed explanation with reference to the accompanying drawings.

[0027] Example 1

[0028] This application provides a laser cutting head protection mechanism, which includes a suspended mounting base 1, a lower extension connecting seat 2, a laser cutting head 3, a gas guide ring pipe 4, an inner diameter ring plate 5, an outer diameter ring plate 6, an annular exhaust port 7, an isobaric exhaust assembly 8, and an air supply assembly 9.

[0029] according to Figure 1-4In one specific embodiment, the suspended mounting base 1 can be pre-installed on a suspended frame on a cutting machine tool. A three-axis adjustment mechanism is integrated on the suspended frame, which, according to instructions, can drive the suspended mounting base 1 and the laser cutting head 3 to move and rise within a certain spatial range above the cutting machine tool. This changes the working position of the laser cutting head 3 in the spatial coordinate system, enabling the laser cutting head 3 to effectively cut the workpiece placed on the worktable of the cutting machine tool. The suspended mounting base 1 is connected to the laser cutting head 3 via a lower extension connecting seat 2. An air guide ring pipe 4, mounted on the suspended mounting base 1 and defining an annular airflow channel, is also sleeved on the outer side of the lower extension connecting seat 2. An inner diameter ring plate 5 and an outer diameter ring plate 6 are connected to the lower surface of the air guide ring pipe 4, so that the inner diameter ring plate 5 and the outer diameter ring plate 6 cooperate to form an annular exhaust port 7 that can directionally output airflow along the sidewall of the laser cutting head 3 with a ring-shaped cross-section. An isobaric exhaust assembly 8, capable of equivalently discharging a cylindrical airflow, is also provided on the lower surface of the air guide ring pipe 4. An air supply assembly 9, which supplies pressurized airflow to the side of the air guide ring pipe 4, is also connected thereto. The air guide ring pipe 4, inner diameter ring plate 5, outer diameter ring plate 6, annular exhaust port 7, and isobaric exhaust assembly 8 provided in this application can cooperate to define the annular gap flow channel, thereby allowing the pressurized airflow supplied by the air supply assembly 9 to transfer heat existing in the annular gap between the protective structure formed by the outer diameter ring plate 6 and the laser cutting head 3 in a directional flow around the surface of the laser cutting head 3. This solves the defect of existing protective structures restricting heat dissipation of the laser cutting head 3, leading to heat accumulation in the outer area of ​​the laser cutting head 3. This effectively reduces the operating temperature of the laser cutting head 3, prevents overheating damage, improves the efficiency and durability of continuous operation of the laser cutting head 3, and extends its service life. The annular gap flow channel provided in this application can also blow away and transfer the smoke and dust generated during the cutting process, effectively adjusting the movement direction of the smoke and dust, preventing the smoke and dust from rising naturally and damaging the optical components of the laser cutting head 3, and improving the working stability and lifespan of the optical components of the laser cutting head 3.

[0030] Preferably, the lower connecting seat 2 includes a seat 21 for mounting the laser cutting head 3 and a connecting rod 22 suspended flush with the annular exhaust port 7. More preferably, the upper axial end of the connecting rod 22 is connected to the suspended mounting base 1. Specifically, the lower axial end of the connecting rod 22 is welded and fixed to the top surface of the seat 21, and its upper axial end is also welded and fixed to the bottom surface of the suspended mounting base 1, thereby limiting the suspension height of the seat 21. This allows the annular airflow output from the annular exhaust port 7 to effectively contact the surface of the laser cutting head 3 mounted on the seat 21, effectively accelerating the transfer of heat dissipated from the surface of the laser cutting head 3, and effectively improving the comprehensiveness and sufficiency of the airflow contact with the sidewall of the laser cutting head 3.

[0031] Preferably, the laser cutting head 3 is a conventional optical module product for laser shaping and emission adjustment, which is an existing modular product and will not be described in detail in this application. Preferably, the laser cutting head 3 can be a laser cutting head product disclosed in existing patents such as CN221185111U and CN220739864U, or it can be a ready-made cutting head product such as the AEF series and TK series available on the market. Specifically, the laser cutting head 3 is connected to the laser generator mounted on the suspended frame or suspended mounting base 1 of the machine tool via an optical fiber cable passing through the base 21 and the suspended mounting base 1, thereby shaping and limiting the laser beam output by the laser generator.

[0032] Preferably, an annular opening 41 is provided on the bottom surface of the air guide ring pipe 4, which can be adjusted and blocked by the equal pressure exhaust assembly 8. Specifically, the air guide ring pipe 4 can be a circular annular pipe with a rectangular cross-section. Preferably, a flange 42 is integrally provided on the top edge of the air guide ring pipe 4 to facilitate its installation on the suspended mounting base plate 1. Preferably, a connecting pipe port 43 communicating with its cavity and corresponding to the air supply assembly 9 is inserted into the side of the air guide ring pipe 4. Specifically, multiple countersunk screws are inserted circumferentially at intervals on the flange 42, thereby fixing the flange 42 to the lower surface of the suspended mounting base plate 1 by inserting the countersunk screws into the suspended mounting base plate 1 to position and install the guide ring pipe 4. The annular opening 41 provided in this application can perform preliminary rectification of the input high-pressure airflow, so that the cylindrical airflow transported by the pipeline can be transformed into an annular airflow, thereby the airflow can effectively wrap around and cover the laser cutting head 3.

[0033] Preferably, a converging annular vertical plate 61 is provided at the lower edge of the outer diameter annular plate 6 to guide the annular airflow to fully contact the side wall of the laser cutting head 3. Preferably, a buffer pad 62 is provided on the outer wall of the outer diameter annular plate 6. Specifically, the buffer pad 62 is made of elastic silicone or sponge. Preferably, a plurality of downwardly inclined ventilation and heat dissipation holes are provided on the plate body of the converging annular vertical plate 61. When there is downward airflow in the flow channel defined by the converging annular vertical plate 61, the airflow can also draw outside air into the flow channel through the ventilation and heat dissipation holes to achieve airflow ejection and accelerate the heat dissipation capacity of the flowing airflow. When the no-airflow stage after welding is completed, the residual heat generated by the laser cutting head 3 can be diffused into the external environment by self-dissipation through the ventilation and heat dissipation holes. The outer diameter ring plate 6 and the converging annular vertical plate 61 provided in this application can form a protective sleeve structure that fits over the laser cutting head 3. This prevents the laser cutting head 3 from being damaged by impact during the process of cutting the weld along the path, effectively protecting the laser cutting head 3. Furthermore, it can define the annular cavity flow channel and guide and limit the output pressurized airflow, causing the airflow to be directionally discharged outward from the annular cavity gap between the converging annular vertical plate 61 and the laser cutting head 3. This forces the airflow to fully contact the surface of the laser cutting head 3, thereby accelerating the transfer of heat dissipated from the surface of the laser cutting head 3. To a certain extent, this accelerates the heat dissipation efficiency of the laser cutting head 3, reduces the surface temperature of the laser cutting head 3, prevents heat accumulation on the surface of the laser cutting head 3, and effectively extends the service life of the laser cutting head 3. In addition, the directional downward airflow can also sweep away and transfer the toxic fumes and dust rising at the cutting position, thereby preventing the rising toxic fumes and dust from affecting the clarity and cleanliness of the laser beam path, and preventing contact with optical components to avoid contamination and corrosion damage to the optical components, thereby improving the effect and quality of continuous laser cutting and ensuring the safety and durability of the laser cutting head 3.

[0034] Preferably, the isobaric exhaust assembly 8 includes a sealing ring plate 81, an elastic limiting member 82, a perforated support ring mesh 83, and an auxiliary guide member 84. Preferably, the perforated support ring mesh 83 is horizontally installed between the inner diameter ring plate 5 and the outer diameter ring plate 6. More preferably, the perforated support ring mesh 83 is connected to the sealing ring plate 81 by the elastic limiting member 82 supported at its mesh intersections, so as to pressurize the sealing ring plate 81 against the bottom surface of the air guide ring pipe 4 and block the annular opening 41. Preferably, an auxiliary guide member 84 is connected to the upper plate surface of the sealing ring plate 81 to limit its movement direction and insert it into the air guide ring pipe 4. The sealing ring plate 81 provided in this application can block the annular opening 41, thereby assisting the annular opening 41 to more evenly transform the cylindrical airflow of the single-sided output air guide ring pipe 4 into an annular cylindrical airflow around the laser cutting head 3, and ensuring that the flow rate and pressure of the annular cylindrical airflow at different height points are approximately equal, so as to effectively dissipate heat from the entire annular sidewall of the laser cutting head 3.

[0035] Preferably, a sealing gasket 811 with an isosceles trapezoidal cross-section is provided on the top surface of the sealing ring plate 81 by means of adhesion or other methods, which can effectively partially fit and seal the annular opening 41. This application ensures the effectiveness of sealing by providing a sealing gasket 811 with an opening surface adapted to the annular opening 41 and made of sealing filling material such as elastic silicone, so that an isobaric air chamber can be formed in the air guide ring pipe 4 as needed. Thus, when the air pressure in the air chamber increases, the entire sealing ring plate 81 can perform a single up-and-down movement while maintaining a horizontal posture, thereby outputting a uniformly pressurized airflow in the shape of a ring cylinder.

[0036] Preferably, the elastic limiting member 82 includes an insertion post 821 supported at the grid intersections of the hollow support ring mesh 83, a sleeve body 822 connected to the bottom surface of the sealing ring plate 81, and a column airbag 823 inside the sleeve body 822. Preferably, the insertion post 821 and the sleeve body 822 are movably connected in such a way that the sleeve body 822 can move up and down relative to each other, and an anti-detachment sliding plate 824 is provided at one end of the insertion post 821 inserted into the sleeve body 822. More preferably, an anti-detachment baffle 825 is also provided at the open end of the sleeve body 822 to limit the relative sliding range of the anti-detachment sliding plate 824 within the sleeve body 822, so as to prevent the insertion post 821 from completely detaching from the sleeve body 822 and to ensure the connection effectiveness of the insertion post 821 inserted into the sleeve body 822. Specifically, the anti-detachment sliding plate 824 abuts against the lower axial end of the column airbag 823, thereby limiting the initial insertion depth of the insertion post 821 through the column airbag 823.

[0037] Preferably, the hollow support ring mesh 83 includes several radially arranged horizontal bars and ring bars, and the horizontal bars and ring bars are connected by welding or integral casting to form a ring-shaped mesh. Preferably, the radial outer end and radial inner end of the horizontal bar are fixed to the inner diameter ring plate 5 and the outer diameter ring plate 6 respectively by welding or other means, thereby positioning the insertion post 821 in a fixed working position and height. Then, the support height of the elastic limiting member 82 is changed by the lifting and lowering movement of the sleeve cylinder 822, so that in the initial state, the sleeve cylinder 822 is pushed up by the column airbag 823 to abut the sealing ring plate 81 against the bottom surface of the air guide ring pipe 4.

[0038] Preferably, the auxiliary guide component 84 includes square guide pins 841 connected to the sealing ring plate 81 and arranged circumferentially, and a guide tube 842 fitted onto the axial upper section of the square guide pins 841 and fixedly connected to the inner top surface of the air guide ring pipe 4 by welding or other means. This effectively limits the movement direction of the sealing ring plate 81, allowing the sealing ring plate 81 to move vertically without lateral deviation or tilting. Preferably, the guide tube 842 has several air guide holes on its side wall to prevent its cavity from forming a closed air pressure chamber that would affect the vertical movement of the guide pins 841.

[0039] Preferably, the air supply assembly 9 includes a pressurized air pump 91 mounted on the suspended mounting base plate 1 and an air supply pipe 92 connected to the exhaust port of the pressurized air pump 91. Preferably, the exhaust port of the air supply pipe 92 is connected to the connecting pipe port 43. Preferably, the pressurized air pump 91 is a ZKLW960Y type pressurized exhaust fan that can adjust the airflow and pressure and is directly connected to the controller and power supply via an external wire. It can effectively draw in outside cold air and pressurize and exhaust the drawn-in cold air.

[0040] Preferably, the electrical components such as the laser cutting head 3 and the pressurized air pump 91 involved in this application are all electrically connected to the controller and the power supply. The control method of this application is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is only used to protect the mechanical device and its mechanical structural features. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0041] For surface connections between components not explicitly specified in this application, conventional bolt connections, snap-fit ​​connections, or fixed connections such as welding can be used. As these are conventional connection methods, this application will not elaborate further on this part. Specifically, the connecting ends of the assembled components all form flange structures, and the two flange structures are connected by bolts, gaskets, or other structures.

[0042] This utility model is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this utility model. However, regardless of any changes in shape or structure, any technical solution falling within the scope of the claims of this utility model is within the protection scope of this utility model. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A laser cutting head protection mechanism, comprising a suspended mounting base plate (1) and a laser cutting head (3), characterized in that, The suspended mounting base (1) is connected to the laser cutting head (3) via the lower extension connector (2). An air guide ring (4) is also sleeved on the outside of the lower extension connector (2), which is mounted on the suspended mounting base (1) and defines an annular airflow channel. An inner diameter ring plate (5) and an outer diameter ring plate (6) are connected to the lower surface of the air guide ring pipe (4), so that the inner diameter ring plate (5) and the outer diameter ring plate (6) cooperate to form an annular exhaust port (7) capable of directional airflow output. An isobaric exhaust assembly (8) capable of equivalently discharging annular gas flow is also provided on the lower surface of the air guide ring pipe (4), and an air supply assembly (9) for supplying pressurized gas flow is also connected to the side of the air guide ring pipe (4).

2. The laser cutting head protection mechanism as described in claim 1, characterized in that, An annular opening (41) that can be blocked by the equal pressure exhaust assembly (8) is provided on the bottom surface of the air guide ring pipe (4), and a flange (42) is also provided on the top edge of the air guide ring pipe (4). The side of the air guide ring pipe (4) is fitted with a connecting pipe (43) that communicates with its cavity and is connected to the air supply component (9).

3. The laser cutting head protection mechanism as described in claim 2, characterized in that, The isobaric exhaust assembly (8) includes a sealing ring plate (81), an elastic limiting member (82), a hollow support ring mesh (83), and an auxiliary guide member (84), wherein, The hollow support ring mesh (83) is horizontally installed between the inner diameter ring plate (5) and the outer diameter ring plate (6), and the hollow support ring mesh (83) is connected to the sealing ring plate (81) by elastic limiting members (82) supported at the intersection of its mesh, so as to press the sealing ring plate (81) against the bottom surface of the air guide ring pipe (4) to block the ring opening (41); An auxiliary guide (84) is connected to the upper plate surface of the sealing ring plate (81) to limit its movement direction and to be inserted into the air guide ring pipe (4).

4. The laser cutting head protection mechanism as described in claim 3, characterized in that, A sealing gasket (811) is provided on the top surface of the sealing ring plate (81) to seal the annular opening (41).

5. The laser cutting head protection mechanism as described in claim 4, characterized in that, The elastic limiting member (82) includes a plug-in post (821) supported at the grid intersection of the hollow support ring (83), a sleeve body (822) connected to the bottom surface of the sealing ring plate (81), and a column airbag (823) disposed in the sleeve body (822).

6. The laser cutting head protection mechanism as described in claim 5, characterized in that, The end of the plug (821) inserted into the sleeve (822) is provided with an anti-detachment sliding plate (824), and the open end of the sleeve (822) is also provided with an anti-detachment baffle (825).

7. The laser cutting head protection mechanism as described in claim 6, characterized in that, The auxiliary guide (84) includes square guide pins (841) that are connected to the sealing ring plate (81) and arranged circumferentially, and a guide tube (842) that is fitted on the upper axial section of the square guide pin (841) and connected to the inner top surface of the air guide ring pipe (4).

8. The laser cutting head protection mechanism as described in claim 7, characterized in that, A converging annular vertical plate (61) is also provided at the lower edge of the outer diameter ring plate (6).

9. The laser cutting head protection mechanism as described in claim 8, characterized in that, The gas supply assembly (9) includes a pressurized air pump (91) mounted on a suspended mounting base plate (1) and an air supply pipeline (92) connected to the exhaust port of the pressurized air pump (91), wherein the air outlet of the air supply pipeline (92) is connected to the connecting pipe (43).

10. The laser cutting head protection mechanism as described in claim 9, characterized in that, The lower extension connector (2) includes a seat body (21) and a connecting rod (22) that defines the installation height of the seat body (21).

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