A nozzle assembly

Abstract

This application relates to a nozzle assembly, belonging to the field of laser cutting technology. The nozzle assembly includes: a connecting plate, a pad, a part body, a ceramic body, and a nozzle connected in sequence; wherein the connecting plate, pad, part body, and ceramic body all have interconnected air holes to form an airflow channel; the ceramic body also has an annular groove at one end near the nozzle, communicating with the airflow channel, and cooling air enters the annular groove through the airflow channel to purge and cool the nozzle; the connecting plate also has a cooling air inlet pipe for an external cooling air supply device on the other side opposite to the part body; the connecting plate has a through hole in a direction perpendicular to the airflow channel, one end of which communicates with the airflow channel, and the other end of which communicates with the cooling air inlet pipe; the diameter ratio of the cooling air inlet pipe to the outlet of the airflow channel is 2-4. This nozzle assembly has excellent cooling effect and a long service life.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, and more specifically to a nozzle assembly. Background Technology

[0002] Laser processing technology is a novel cutting technique that utilizes the interaction between a laser beam and matter to perform cutting, drilling, and micro-machining. Laser processing technology is characterized by its speed, lack of extrusion, and minimal burrs, and therefore has found increasingly widespread application.

[0003] In laser cutting head design, the nozzle assembly primarily functions to focus the gas, remove molten slag, and control cutting quality. However, existing laser cutting heads suffer from the following problem: after prolonged operation, the nozzle overheats, affecting cutting quality and stability.

[0004] In addition, the nozzle is often screwed to the main body through a locking ring. Because it needs to be disassembled and installed frequently, the threads on the main body wear, which reduces the service life of the main body. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this application is to provide a nozzle assembly to solve the problems of poor cooling effect and reduced service life of the nozzle body in the prior art.

[0006] To achieve the above objectives, this application provides a nozzle assembly comprising:

[0007] The connecting plate, pad, main body of the part, ceramic body, and nozzle are connected in sequence.

[0008] The connecting plate, the pad, the main body of the part, and the ceramic body are all provided with interconnected air holes to form airflow channels;

[0009] The ceramic body is also provided with an annular groove at one end near the nozzle, which communicates with the airflow channel. Cooling gas enters the annular groove through the airflow channel to purge and cool the nozzle.

[0010] The connecting plate, on the side opposite to the main body of the part, is also provided with a cooling air inlet pipe for an external cooling air supply device. The connecting plate has a through hole perpendicular to the airflow channel; one end of the through hole communicates with the airflow channel, and the other end communicates with the cooling air inlet pipe.

[0011] The diameter ratio of the cooling gas inlet pipe to the outlet pipe of the airflow channel is 2-4.

[0012] Furthermore, in some embodiments of this application, in the axial direction of the nozzle, the projection of the base of the nozzle onto the ceramic body at least partially covers the outlet surface of the airflow channel.

[0013] Furthermore, in some embodiments of this application, the height of the outer wall of the annular groove of the ceramic body is higher than the height of the inner wall of the annular groove.

[0014] Furthermore, in some embodiments of this application, the inner diameter of the annular groove of the ceramic body is smaller than the outer diameter of the base of the nozzle.

[0015] Furthermore, in some embodiments of this application, the nozzle assembly further includes a locking ring, through which the ceramic body is connected to the main body of the component.

[0016] Furthermore, in some embodiments of this application, the ceramic body has a boss at one end near the main body of the part, and the locking ring has a locking platform corresponding to the boss of the ceramic body;

[0017] The inner wall of the locking ring is provided with an internal thread, and the locking ring is threadedly connected to the main body of the part through the internal thread.

[0018] Furthermore, in some embodiments of this application, the main body of the part includes a threaded section for threaded connection with the locking ring and a non-threaded section not connected with the locking ring, wherein the threaded section is made of stainless steel and the non-threaded section is made of aluminum alloy.

[0019] Furthermore, in some embodiments of this application, an extension block is further included between the main body of the component and the connecting plate. The extension block is detachably connected to the connecting plate and the pad, and the extension block has an air hole that serves as part of the cooling airflow channel.

[0020] Furthermore, in some embodiments of this application, the nozzle is detachably connected to the ceramic body.

[0021] Furthermore, in some embodiments of this application, the cooling gas inlet pipe is provided with an airflow valve.

[0022] The beneficial effects of this application are:

[0023] (1) This application controls the cooling airflow by controlling the pipe diameter ratio of the cooling air inlet pipe to the cooling air flow channel, thereby achieving a better nozzle cooling effect.

[0024] (2) This application forms a cooling airflow channel by setting interconnected air holes, and with the structural design of the annular groove, the overall structure is simple, no additional cooling air pipe is required, and it has no impact on the main component of the nozzle, resulting in high cooling efficiency.

[0025] (3) This application adds a cooling airflow channel to the nozzle body component to purge and cool the nozzle, which greatly improves the service life of the nozzle and also enhances the stability of cutting.

[0026] (4) The main body of the part in this application adopts a two-section design, with the threaded section made of stainless steel and the non-threaded section made of aluminum alloy, which improves the thread strength of the main body of the part and increases its service life.

[0027] (5) All components of the nozzle assembly of this application are connected in a detachable manner, which facilitates disassembly and replacement.

[0028] (6) The nozzle assembly of this application is provided with an extension block, which can meet more usage scenarios. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a structural diagram of a nozzle assembly provided in some embodiments of this application.

[0031] Figure 2 This is a schematic diagram of the nozzle cooling gas flow channel provided in some embodiments of this application.

[0032] Figure 3 This is a schematic diagram of the main structure of a nozzle component provided in some embodiments of this application.

[0033] Explanation of key component symbols:

[0034] 1- Nozzle; 2- Ceramic body; 3- Locking ring; 4- Main body of part; 4-1- Threaded section; 4-2- Non-threaded section; 5- Pad; 6- Extension block; 7- Connecting plate; 7-1- Through hole. Detailed Implementation

[0035] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] This application provides a nozzle assembly, including:

[0037] The connecting plate, pad, main body of the part, ceramic body, and nozzle are connected in sequence.

[0038] The connecting plate, the pad, the main body of the part, and the ceramic body are all provided with interconnected air holes to form airflow channels;

[0039] The ceramic body is also provided with an annular groove at one end near the nozzle, which communicates with the airflow channel. Cooling gas enters the annular groove through the airflow channel to purge and cool the nozzle.

[0040] The connecting plate, on the side opposite to the main body of the part, is also provided with a cooling air inlet pipe for an external cooling air supply device. The connecting plate has a through hole perpendicular to the airflow channel; one end of the through hole communicates with the airflow channel, and the other end communicates with the cooling air inlet pipe.

[0041] The diameter ratio of the cooling gas inlet pipe to the outlet pipe of the airflow channel is 2-4.

[0042] During use, cooling air enters through the cooling air inlet pipe, and sequentially enters the annular groove of the ceramic body through the airflow channels in the connecting plate, pad block, main body of the part, and ceramic body, and then blows and cools the nozzle through the annular groove.

[0043] In the above process, the connecting plate, pad block, and main body of the parts form an airflow channel by opening air holes, and the ceramic body is provided with an annular groove. It does not involve the setting of a separate cooling air pipe, the structure is simple, and the cooling effect on the nozzle is excellent.

[0044] If the pipe diameter ratio between the cooling air intake pipe and the airflow channel outlet exceeds 4, the cooling air pressure will be too high, which may result in insufficient cooling air flow and poor nozzle cooling effect. In addition, if the cooling air intake pipe is too large, there may be structural problems with the connection with the through hole on the connecting plate.

[0045] If the pipe diameter ratio between the cooling gas inlet pipe and the airflow channel outlet is less than 2, the cooling gas pressure will be insufficient, resulting in poor cooling effect of the nozzle, causing the nozzle to become red-hot and prone to damage. This will also affect the stability of the cutting process.

[0046] The pipe diameter ratio between the cooling gas inlet pipe and the airflow channel outlet is controlled at 2-4, which can optimize the cooling effect of the nozzle, greatly improve the service life of the nozzle, enhance the stability of cutting, and also help with cost control and environmental protection.

[0047] The diameter of the air vents in the airflow channel and the diameter of the through holes on the connecting plate can be the same or different.

[0048] When the diameter of the air vent in the airflow channel is different from the diameter of the through hole on the connecting plate, the diameter of the through hole from the inlet of the connecting plate to the outlet of the airflow channel can be set to present a gradient change until the ratio of the diameter of the cooling air inlet pipe to the diameter of the airflow channel outlet is 2-4, which is not limited in this application.

[0049] In some embodiments, in the axial direction of the nozzle, the projection of the base of the nozzle onto the ceramic body at least partially covers the outlet surface of the airflow channel.

[0050] In this application, the preferred method is that the projection of the nozzle base onto the ceramic body completely covers the outlet surface of the airflow channel, so that more cooling air enters the annular groove to cool the nozzle.

[0051] In practical use, the structural features of the nozzle assembly can also be taken into account, and the projection of the nozzle base on the ceramic body can cover the outlet surface of the airflow channel to ensure the cooling effect.

[0052] In some embodiments, the height of the outer wall of the annular groove of the ceramic body is higher than the height of the inner wall of the annular groove.

[0053] In some embodiments, the inner diameter of the annular groove of the ceramic body is smaller than the outer diameter of the base of the nozzle.

[0054] In this application, an annular groove is provided on the ceramic body and communicates with the airflow channel. Cooling airflow is blown out from the airflow channel and guided through the annular groove, thereby purging and cooling the nozzle, thereby controlling the cutting quality and improving the service life of the nozzle.

[0055] The annular groove design is more conducive to the flow of cooling air, thus ensuring the purging and cooling effect on the nozzle.

[0056] In some embodiments, the nozzle assembly further includes a locking ring through which the ceramic body is connected to the part body.

[0057] In some embodiments, the ceramic body has a boss at one end near the main body of the part, and the locking ring has a locking platform corresponding to the boss of the ceramic body;

[0058] The inner wall of the locking ring is provided with an internal thread, and the locking ring is threadedly connected to the main body of the part through the internal thread.

[0059] In this application, the locking ring can be a ring-shaped locking platform or a combination of two or more independent locking platforms. When the locking ring has multiple independent locking platforms, the multiple independent locking platforms are evenly distributed in a ring on the locking ring.

[0060] During use, one end of the locking ring is connected to the boss of the ceramic body via a locking plate, and the other end is connected to the thread of the main body of the part via an internal thread.

[0061] In some embodiments, the part body includes a threaded section for threaded connection with the locking ring and a non-threaded section not connected with the locking ring, wherein the threaded section is made of stainless steel and the non-threaded section is made of aluminum alloy.

[0062] During use, the nozzle will be replaced frequently depending on the usage. During disassembly, the threads of the main body of the part may be damaged. By using stainless steel sections for the threaded sections of the main body of the part, the main body of the part can be protected. Only the locking ring needs to be replaced. The locking ring is easy to replace and has low cost. Therefore, the design of threaded and non-threaded sections of the main body of the part reduces costs and increases the service life of the main body of the part.

[0063] Specifically, the stainless steel section of the threaded section of the main body of the part may be made of AISI 304 material or other types of stainless steel material that can ensure that the threaded section is not damaged, and this application does not limit it.

[0064] The non-threaded aluminum alloy section of the main body of the part can be made of 6061-T6 material or other types of aluminum alloy material that can guarantee the basic function of the main body of the part. This application does not limit the choice of material.

[0065] The threaded and non-threaded sections are assembled together using a heat transfer process, and the connection points need to be conductive.

[0066] In some embodiments, an extension block is further included between the main body of the component and the connecting plate. The extension block is detachably connected to the connecting plate and the pad, respectively. The extension block has air holes that serve as part of the cooling airflow channel.

[0067] In this application, in order to meet more application scenarios, an extension block is provided between the main body of the nozzle assembly and the connecting plate, so that the nozzle has a relatively slender shape.

[0068] The two ends of the extension block are detachably connected to the pad block and the connecting plate, respectively. This design makes it easy to match the nozzle assembly in real time according to the needs of the usage scenario.

[0069] The detachable connection methods between the extension block and the connecting plate and pad block include, but are not limited to, snap-fit ​​and screw-fit.

[0070] In some embodiments, the nozzle is detachably connected to the ceramic body.

[0071] In this application, considering that the nozzle may be damaged after long-term use, the nozzle is detachably connected to the ceramic body in order to facilitate nozzle replacement and control costs.

[0072] Specifically, the nozzle and the ceramic body can be detachably connected in ways including but not limited to snap-fit ​​and screw-fit.

[0073] In some embodiments, the cooling air intake pipe is provided with an airflow valve.

[0074] In this application, the cooling air pressure can be controlled by an airflow valve. When the nozzle cooling effect is poor, the airflow valve is increased to increase the air pressure. When the nozzle cooling effect is good, the airflow valve can be appropriately reduced to reduce energy consumption and lower costs.

[0075] By controlling the airflow valve and maintaining the pipe diameter ratio of the cooling air inlet pipe to the airflow channel at 2-4, the cooling air pressure can be better controlled, thereby ensuring the purging and cooling effect on the nozzle, which in turn ensures the cutting quality and extends the nozzle's service life.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A nozzle assembly, comprising: The assembly comprises a connecting plate, a pad, a main body of a component, a ceramic body, and a nozzle, connected in sequence. The connecting plate, the pad, the main body of the component, and the ceramic body are all provided with interconnected air holes to form an airflow channel. One end of the ceramic body near the nozzle is also provided with an annular groove communicating with the airflow channel. Cooling gas enters the annular groove through the airflow channel to purge and cool the nozzle. The connecting plate, on the other side away from the main body of the component, is also provided with a cooling gas inlet pipe for an external cooling gas supply device. The connecting plate has a through hole perpendicular to the airflow channel, with one end communicating with the airflow channel and the other end communicating with the cooling gas inlet pipe. The diameter ratio of the cooling gas inlet pipe to the outlet diameter of the airflow channel is 2-4.

2. The nozzle assembly according to claim 1, characterized in that, In the axial direction of the nozzle, the projection of the nozzle base onto the ceramic body at least partially covers the outlet surface of the airflow channel.

3. The nozzle assembly according to claim 1, characterized in that, The height of the outer wall of the annular groove of the ceramic body is higher than the height of the inner wall of the annular groove.

4. The nozzle assembly according to claim 1, characterized in that, The inner diameter of the annular groove of the ceramic body is smaller than the outer diameter of the base of the nozzle.

5. The nozzle assembly according to claim 1, characterized in that, The nozzle assembly also includes a locking ring, through which the ceramic body is connected to the main body of the component.

6. The nozzle assembly according to claim 5, characterized in that, The ceramic body has a boss at one end near the main body of the part, and the locking ring has a locking platform corresponding to the boss of the ceramic body; the inner wall of the locking ring is provided with an internal thread, and the locking ring is threadedly connected to the main body of the part through the internal thread.

7. The nozzle assembly according to claim 5, characterized in that, The main body of the part includes a threaded section for threaded connection with the locking ring and a non-threaded section not connected with the locking ring. The threaded section is made of stainless steel and the non-threaded section is made of aluminum alloy.

8. The nozzle assembly according to claim 1, characterized in that, An extension block is also included between the main body of the component and the connecting plate. The extension block is detachably connected to the connecting plate and the pad, and the extension block has air holes that serve as part of the cooling airflow channel.

9. The nozzle assembly according to claim 1, characterized in that, The nozzle is detachably connected to the ceramic body.

10. The nozzle assembly according to claim 1, characterized in that, An airflow valve is installed on the cooling air intake pipe.

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