Double-layer nozzle structure for laser cutting

Abstract

The utility model discloses a double-layer nozzle structure for laser cutting, which relates to the technical field of laser processing and comprises an inner ring nozzle, an outer ring nozzle and an air guide nozzle. The inner ring nozzle is sleeved with the outer ring nozzle, the two ends of the inner ring nozzle are located on the outer side of the outer ring nozzle, a cooling air channel is formed between the outer ring nozzle and the inner ring nozzle, the bottom of the inner ring nozzle is sleeved with the air guide nozzle, and the air guide nozzle can guide cooling air to be diffused outwards. By means of the design of the double-layer nozzles, isolation of process gas and cooling gas is achieved, negative pressure is formed in the machining area due to guiding of the air guiding nozzles, the influence of air is smaller when the process gas is cut, and the gas utilization rate is higher.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of laser processing, specifically relates to a double -layer nozzle structure for laser cutting. BACKGROUND

[0002] At present, the nozzle of laser cutting machine on the market is commonly single -layer nozzle, double -layer nozzle. Whether it is single -layer nozzle or double -layer nozzle, the gas used is process gas (commonly known as nitrogen, oxygen, etc.), and the purity is very high, which is relatively expensive. The nozzle is often cooled by small flow air blowing on the nozzle surface, and the cooling effect is not ideal. When the air flow increases, the process gas is also affected, so that the purity of the processing area is reduced, and the cutting quality is affected.

[0003] Therefore, under the premise of ensuring cutting quality, we design a double -layer nozzle structure for laser cutting to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problems existing in the prior art, the utility model provides a double -layer nozzle structure for laser cutting.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A double -layer nozzle structure for laser cutting, comprising an inner circle nozzle, an outer circle nozzle and a wind guide nozzle;

[0007] The outer circle nozzle is arranged on the inner circle nozzle, and the two ends of the inner circle nozzle are located outside the outer circle nozzle, and a cooling air channel is formed between the outer circle nozzle and the inner circle nozzle, and the wind guide nozzle is arranged at the bottom of the inner circle nozzle, and the wind guide nozzle can guide the cooling gas to diffuse outward.

[0008] Optionally, the outer circle nozzle and the inner circle nozzle are connected by conical face interference fit.

[0009] Optionally, the outer surface of the inner circle nozzle is formed with a milled flat polygon by a milling machine, and the milled flat polygon and the outer circle nozzle form a cooling air channel.

[0010] Optionally, the milled flat polygon is a milled flat hexagon.

[0011] Optionally, the bottom of the inner circle nozzle is provided with a mounting groove, and the mounting groove is used for mounting the wind guide nozzle.

[0012] Optionally, the wind guide nozzle and the inner circle nozzle are screw connected.

[0013] Optionally, the outer edge of the wind guide nozzle is tangent to the milled flat polygon.

[0014] Optionally, the outer side of the air guide nozzle is concave to form an air guide surface.

[0015] Optionally, the bottom of the outer ring nozzle is formed with a transition arc surface matched with the air guide surface of the air guide nozzle.

[0016] Optionally, the top of the inner ring nozzle is provided with a ring groove.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The double-layer nozzle structure can separate the process gas and the cooling gas, and the air guide nozzle is arranged at the cooling gas outlet, so that the cooling gas is diffused outward through the guidance of the air guide nozzle, and a negative pressure area is formed right below the nozzle due to Bernoulli effect when the cooling gas flows out of the air guide nozzle outlet; the cooling gas flows along the gap between the inner and outer ring nozzles, so that the cooling effect of the nozzle is more remarkable, and the service life of the nozzle is improved.

[0019] When the laser emits light, the process gas flows out of the center of the nozzle at the same time, and the laser also acts on the workpiece surface; due to the action of the negative pressure, the purity of the process gas is higher than that when the ordinary nozzle is processed, which is beneficial to the cutting operation. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structure schematic view of the prior art single-layer nozzle.

[0021] Figure 2 is a sectional view schematic view of the prior art single-layer nozzle.

[0022] Figure 3 is a structure schematic view of the utility model embodiment.

[0023] Figure 4 is an explosion view of the utility model embodiment.

[0024] Figure 5 is a sectional view schematic view of the utility model embodiment.

[0025] Figure 6 is a use state schematic view of the utility model embodiment.

[0026] Reference signs in the drawings:

[0027] 1, outer ring nozzle; 11, transition arc surface; 2, inner ring nozzle; 21, milled flat polygon; 22, mounting groove; 3, air guide nozzle; 31, air guide surface; 4, cooling gas channel. DETAILED DESCRIPTION

[0028] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments of the present application.

[0029] In the prior art, the structure of the single-layer nozzle is shown in Figure 1 and Figure 2 , which is a rotating body structure and includes a connecting part, a detachable ring and a nozzle body which are integrally formed and arranged in sequence. The outer side of the detachable ring is formed with knurled vertical lines, the nozzle body is conical, and the end of the nozzle body is hemispherical. The connecting part is formed with a gas jet channel penetrating into the inside of the nozzle body, and the nozzle body is formed with a gas outlet channel connected with the gas jet channel. The gas outlet channel gradually narrows with the increase of the distance from the gas jet channel, and the end center of the nozzle body is formed with a gas jet outlet communicating with the gas outlet channel.

[0030] As shown in Figures 3 to 6 , the present application discloses a double-layer nozzle structure for laser cutting. The structure mainly includes an outer nozzle 1, an inner nozzle 2 and a wind guide nozzle 3. The outer nozzle 1 is precisely sleeved on the inner nozzle 2, and the two ends of the inner nozzle 2 protrude outwardly from the outer nozzle 1, so that a cooling gas channel 4 is successfully constructed between the outer nozzle 1 and the inner nozzle 2. The wind guide nozzle 3 is cleverly sleeved at the bottom of the inner nozzle 2, and its unique design can effectively guide the cooling gas to be distributed in a diffusion shape outwardly, thereby significantly improving the cooling performance and working efficiency of the double-layer nozzle structure in the laser cutting process, and providing reliable technical support and equipment guarantee for the optimization of the laser cutting process.

[0031] The present embodiment redesigns the traditional single-layer nozzle, increases an outer nozzle 1 outside the inner nozzle 2, thereby separates the process gas and the cooling gas, and installs a wind guide nozzle 3 at the outlet of the cooling gas, which can be guided by the wind guide nozzle 3. The cooling gas diffuses outwardly, and the purity of the process gas is not affected during the processing.

[0032] Generally, the cooling gas is always in an open state during the processing, and air is often used for cooling. Before processing, the steel plate is located below the nozzle. When the cooling gas diffuses and flows out from the outlet of the wind guide nozzle 3, due to the Bernoulli effect, a negative pressure area is formed directly below the nozzle (see Figure 6 ). When the process gas flows out from the center of the nozzle at the moment before the laser light is emitted, the laser also acts on the surface of the workpiece. Due to the effect of negative pressure, the purity of the process gas is higher than that when the ordinary nozzle is processed, which is beneficial to the cutting operation. And because the cooling gas flows along the cooling gas channel 4 between the inner and outer nozzles, the cooling effect of the nozzle is more significant, and the service life of the nozzle can be improved.

[0033] In the present embodiment, both the outer nozzle 1 and the inner nozzle 2 adopt a rotating body structure design. The inner side of the outer nozzle 1 is carefully crafted into a conical hole, which is characterized by a large upper and small lower shape, while the outer side of the inner nozzle 2 is precisely shaped into a conical surface that perfectly matches it. At the same time, the outer surface of the inner nozzle 2 is processed by a milling machine to form a milled flat polygon 21. The space between the milled flat polygon 21 and the outer nozzle 1 forms a cooling air channel 4. In actual application scenarios, the outer nozzle 1 and the inner nozzle 2 are fixedly connected by the interference fit of the conical surface, which effectively ensures the stability and functionality of the entire structure during operation.

[0034] In addition, the outer nozzle 1 and the inner nozzle 2 can also adopt other connection methods, such as key fitting or bolt fixation, which will not be described in detail.

[0035] Based on the above technical solution, the milled flat polygon 21 on the outer surface of the inner nozzle 2 is specifically designed as a milled flat hexagon. The milling surface is evenly distributed on the inner nozzle 2 in a circular manner, and the center line of the milling surface is parallel to the corresponding generatrix of the conical surface on the outer nozzle 1. Through this ingenious design layout, it can effectively ensure that the cooling gas is evenly distributed in the cooling air channel 4 when entering, thereby optimizing the performance of the entire cooling system and greatly improving the stability and reliability of the device during operation, providing a solid guarantee for the efficient implementation of related processes.

[0036] In a preferred embodiment, the bottom of the inner nozzle 2 is precisely provided with a mounting groove 22, which is specially used as the mounting position of the air guide nozzle 3. In detail, the air guide nozzle 3 is designed as a rotating body structure, and the inner side is cleverly processed to form an internal thread. At the same time, the side surface of the mounting groove 22 is correspondingly structured to form an external thread that matches it. Through the close cooperation of the internal and external threads, the air guide nozzle 3 can be stably and reliably connected with the inner nozzle 2.

[0037] In a preferred embodiment, the outer edge of the air guide nozzle 3 is precisely tangent to the milling surface of the milled flat polygon 21, which makes the structure connection more compact and reasonable. At the same time, the outer side of the air guide nozzle 3 adopts an inner recess design to form a unique air guide surface 31. Further, the bottom of the outer nozzle 1 is cleverly structured to form a transition arc surface 11 that matches the air guide surface 31 of the air guide nozzle 3. The cooperation of the transition arc surface 11 and the air guide surface 31 can effectively guide the cooling gas to flow along the predetermined path, reduce the turbulence and energy loss of the airflow, and significantly improve the guiding effect and utilization efficiency of the cooling gas, providing a strong structural foundation and aerodynamic guarantee for the efficient and stable operation of the entire device.

[0038] In the embodiment, the outer side of the outer nozzle 1 is designed as a rotating body structure, and the thickness is uniformly arranged. A detachable ring is arranged on the top of the outer nozzle 1, and the outer side of the detachable ring is formed with knurled vertical lines. In addition, an annular groove is accurately formed on the top of the inner nozzle 2, and the annular groove is mainly used for connecting with other related components.

[0039] In other possible embodiments, the bottom of the inner nozzle 2 is further innovatively designed. A conical groove is formed on the bottom of the inner nozzle 2 by a specific process, and the ingenious design achieves the effect that the cooling air channels 4 are connected with each other. The mutual connection of the cooling air channels 4 is beneficial to the uniform outflow of the cooling gas from the entire nozzle structure.

[0040] Compared with the prior art, the utility model has the following beneficial effects:

[0041] The double-layer nozzle structure of the utility model has the function of effectively separating the process gas and the cooling gas. The air guide nozzle 3 is arranged at the outlet position of the cooling gas, and the cooling gas can be smoothly diffused outward by the accurate guiding effect of the air guide nozzle 3. According to the Bernoulli effect, a negative pressure area is accurately formed below the nozzle when the cooling gas is diffused from the outlet of the air guide nozzle 3. Because the cooling gas stably flows along the gap between the inner and outer nozzles, the unique flow mode can greatly improve the cooling efficiency of the nozzle, significantly enhance the heat dissipation efficiency of the nozzle, effectively prolong the service life of the nozzle, and reduce the equipment maintenance cost and replacement frequency.

[0042] When the laser is about to emit light, the process gas stably flows out from the center of the nozzle, and at the same time, the laser accurately acts on the workpiece surface. Due to the special effect of the negative pressure area, the purity of the process gas is obviously improved compared with the ordinary nozzle processing. The high-purity process gas can effectively reduce the interference of impurities on the cutting process, optimize the cutting quality, improve the cutting precision and speed, thereby creating more favorable process conditions for the cutting operation, significantly improving the efficiency and quality level of the overall cutting process, and having extremely important application value and popularization prospect in the industrial production field.

[0043] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, and all should be covered in the protection scope of the utility model.

Claims

1. A double-layer nozzle structure for laser cutting, characterized by, The inner nozzle (2), the outer nozzle (1) and the air guide nozzle (3) are included. The outer nozzle (1) is sleeved on the inner nozzle (2), and both ends of the inner nozzle (2) are located outside the outer nozzle (1), a cooling air channel (4) is formed between the outer nozzle (1) and the inner nozzle (2), and the air guide nozzle (3) is sleeved on the bottom of the inner nozzle (2), and the air guide nozzle (3) can guide the outward diffusion of cooling gas.

2. A double layer nozzle structure for laser cutting according to claim 1, characterized in that, The outer nozzle (1) and the inner nozzle (2) are connected through a conical surface interference fit.

3. A double layer nozzle structure for laser cutting according to claim 2, characterized in that, The outer surface of the inner nozzle (2) is formed with a milled polygon (21) through a milling machine, and the milled polygon (21) and the outer nozzle (1) form a cooling air channel (4).

4. The double-layer nozzle structure for laser cutting according to claim 3, wherein The milled polygon (21) is a milled hexagon.

5. The double-layer nozzle structure for laser cutting according to claim 2, wherein The bottom of the inner nozzle (2) is provided with a mounting groove (22) for mounting the air guide nozzle (3).

6. A double layer nozzle structure for laser cutting according to claim 5, characterized in that, The air guide nozzle (3) is threadedly connected with the inner nozzle (2).

7. The double-layer nozzle structure for laser cutting according to claim 5, wherein The outer edge of the air guide nozzle (3) is tangent to the milled polygon (21).

8. A double-layer nozzle structure for laser cutting according to any one of claims 5-7, characterized in that, The outer side of the air guide nozzle (3) is concave to form an air guide surface (31).

9. A double layer nozzle structure for laser cutting according to claim 8, characterized in that, The bottom of the outer nozzle (1) is formed with a transition arc surface (11) matched with the air guide surface (31) of the air guide nozzle (3).

10. The double layer nozzle structure for laser cutting according to claim 1, wherein The top of the inner nozzle (2) is provided with a ring groove.

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