Pressure maintaining nozzle for laser cutting

Abstract

The utility model discloses a pressure maintaining nozzle for laser cutting, which comprises a main body, a mounting seat and a ceramic body, the main body is sleeved on the outer side of the mounting seat, a mounting hole is arranged in the mounting seat, a through hole is arranged at the bottom of the main body, the through hole is communicated with the mounting hole, the ceramic body comprises a limiting part and a straight cylinder part, the limiting part is positioned in the through hole, and the straight cylinder part is arranged below the limiting part. The diameter of the mounting hole is larger than that of the through hole, the outer diameter of the straight cylinder part is smaller than that of the limiting part, the outer diameter of the straight cylinder part is consistent with that of the through hole, the straight cylinder part can penetrate through the through hole and then extend out, and a hollow hole is formed in the ceramic body. The outer diameter of the straight cylinder part is smaller than the aperture of the mounting hole, so that the ceramic body can move up and down in the mounting hole, when the height of a cut material changes, the ceramic body can correspondingly move up and down, the bottom end of the ceramic body is always kept close to the cut material, and the situation that the cutting distance is large, and the cutting pressure is insufficient is effectively avoided. And the pressure maintaining effect is achieved, and the cutting quality and the cutting efficiency are guaranteed.

Description

Technical Field

[0001] This utility model relates to a laser nozzle, and more particularly to a pressure-holding nozzle for laser cutting. Background Technology

[0002] Laser cutting utilizes a high-power-density laser beam to irradiate the material being cut. As the beam moves across the material, a very narrow kerf is formed, completing the cutting process. A laser nozzle is essential in laser cutting. For example, application number 201921431274.0 discloses a laser nozzle with multiple heat dissipation holes. Because the distance between the laser nozzle and the material being cut is very small during cutting, changes in the height of the material can alter the gap between them, potentially leading to an excessively large distance that affects cutting quality and efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a pressure-holding nozzle for laser cutting that can solve at least one of the above problems.

[0004] According to one aspect of the present invention, a pressure-holding nozzle for laser cutting is provided, comprising a main body, a mounting base, and a ceramic body. The main body is sleeved on the outside of the mounting base, and the mounting base has a mounting hole. The bottom of the main body has a through hole that communicates with the mounting hole. The ceramic body includes a limiting part and a straight cylindrical part. The limiting part is located inside the through hole, and the straight cylindrical part is located below the limiting part. The diameter of the mounting hole is larger than the diameter of the through hole, the outer diameter of the straight cylindrical part is smaller than the outer diameter of the limiting part, and the outer diameter of the straight cylindrical part is the same as the diameter of the through hole. The straight cylindrical part can extend through the through hole and has a hollow hole inside the ceramic body.

[0005] The beneficial effects of this utility model are: because the outer diameter of the straight cylinder is smaller than the diameter of the mounting hole, the ceramic body can move up and down within the mounting hole. Thus, when the height of the cutting material changes, the ceramic body can move up and down accordingly, so that the bottom of the ceramic body always remains close to the cutting material. This effectively avoids insufficient cutting pressure when the cutting distance is large, plays a pressure-holding role, and helps to ensure cutting quality and cutting efficiency.

[0006] In some embodiments, the axial length of the limiting part is less than the axial length of the mounting hole. This allows the limiting part to have sufficient space to move within the mounting hole, facilitating the vertical movement of the ceramic body.

[0007] In some embodiments, the axial length of the straight cylindrical portion is greater than the axial length of the through hole. This allows the bottom end of the ceramic body to extend beyond the through hole.

[0008] In some embodiments, guide portions are provided at both ends of the hollow hole, and the guide portions are arc-shaped. Therefore, the arc-shaped guide portions can guide the airflow, achieving a better pressure stabilization effect.

[0009] In some embodiments, the top of the through hole is provided with an inclined portion, the diameter of the top of the inclined portion being the same as the diameter of the mounting hole, and the diameter of the bottom of the inclined portion being the same as the diameter of the through hole. Therefore, by providing the inclined portion, the machining of the through hole is facilitated, and the connection and transition between the through hole and the mounting hole are achieved, which helps to improve the stability of the ceramic body's movement.

[0010] In some embodiments, the upper part of the mounting base is provided with a connecting portion, and the connecting portion has external threads. Therefore, by providing the connecting portion, it is convenient to mate and install the entire nozzle with the external structure.

[0011] In some embodiments, the mounting base is provided with a baffle, which is located between the connecting part and the main body, and the outer diameter of the baffle is larger than the outer diameter of the main body. Therefore, by providing the baffle, the installation can be limited, and at the same time, the heat dissipation area of ​​the entire mounting base can be increased, thereby improving heat dissipation efficiency.

[0012] In some implementations, the main body and the mounting base are fixed together by a threaded connection. This facilitates the installation of the main body on the mounting base. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a pressure-holding nozzle for laser cutting according to this utility model.

[0014] Figure 2 This is a cross-sectional structural diagram of a pressure-holding nozzle for laser cutting according to this utility model.

[0015] Figure 3 This is a schematic diagram of the mounting base in a pressure-holding nozzle for laser cutting according to this utility model.

[0016] Figure 4 This is a schematic diagram of the ceramic body in a pressure-holding nozzle for laser cutting according to this utility model. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings.

[0018] Reference Figures 1-4A pressure-holding nozzle for laser cutting includes a main body 1, a mounting base 2, and a ceramic body 3. The main body 1 is fitted onto the outside of the mounting base 2. The mounting base 2 has a mounting hole 21, and the bottom of the main body 1 has a through hole 11 connected to the mounting hole 21. The ceramic body 3 includes a limiting part 31 and a straight cylindrical part 32. The limiting part 31 is located inside the through hole 11, and the straight cylindrical part 32 is located below the limiting part 31. The diameter of the mounting hole 21 is larger than the diameter of the through hole 11, and the outer diameter of the straight cylindrical part 32 is smaller than the outer diameter of the limiting part 31. The outer diameter of the straight cylindrical part 32 is the same as the diameter of the through hole 11, and the straight cylindrical part 32 can extend through the through hole 11. The ceramic body 3 has a hollow hole 33. Thus, there is a gap between the straight cylindrical part 32 and the inner wall of the mounting hole 21, which greatly reduces the resistance when the ceramic body 3 moves within the mounting hole 21, facilitating the vertical movement of the ceramic body 3. The ceramic body 3 can be made of other high-temperature insulating materials.

[0019] Therefore, after the laser cutting pressure-holding nozzle is assembled, the ceramic body 3 can move within the mounting hole 21, and can move downwards, extending below the through hole 11. Thus, during cutting, the extension length of the ceramic body 3 can vary accordingly with the material thickness based on the height of the material being cut, preventing excessive distance between the bottom of the ceramic body 3 and the material being cut, thereby ensuring the cutting strength during laser cutting and achieving a pressure-holding effect.

[0020] The axial length of the limiting part 31 is less than the axial length of the mounting hole 21. The outer periphery of the limiting part 31 is in contact with the inner wall of the mounting hole 21. Since the thickness of the limiting part 31 is small, the ceramic body 3 can move up and down in the mounting hole 21.

[0021] The axial length of the straight cylindrical portion 32 is greater than the axial length of the through hole 11. Therefore, when the ceramic body 3 moves downward within the mounting hole 21, the bottom of the straight cylindrical portion 32 can extend out of the through hole 11, which helps to reduce the distance between the ceramic body 3 and the cutting material and ensures the laser cutting effect.

[0022] In actual use, a limiting step 25 is provided inside the mounting hole 21, and the limiting step 25 is located above the ceramic body 3. When the ceramic body 3 moves to the top position inside the mounting hole 21, the top of the limiting part 31 abuts against the limiting step 25. By providing the limiting step 25, it can be ensured that the ceramic body 3 is always located inside the mounting hole 21.

[0023] Both ends of the hollow hole 33 are provided with guide portions 34, which are arc-shaped. The arc-shaped guide portions 34 facilitate the smooth flow of air and ensure the stability of the cutting.

[0024] The top of the through hole 11 is provided with an inclined portion 12. The diameter of the top of the inclined portion 12 is the same as the diameter of the mounting hole 21, and the diameter of the bottom of the inclined portion 12 is the same as the diameter of the through hole 11. The inclined portion 12 facilitates a smooth transition between the mounting hole 21 and the through hole 11; at the same time, the inclined portion 12 can limit the lowest position of the downward movement of the limiting portion 31.

[0025] The upper part of the mounting base 2 is provided with a connecting part 22, and the connecting part 22 is formed with an external thread 23. Through the external thread 23, the mounting base 2 can be easily fixed to the corresponding structure of the laser equipment by the thread, and the overall installation is convenient.

[0026] The mounting base 2 is provided with a baffle 24, which is located between the connecting part 22 and the main body 1. The outer diameter of the baffle 24 is larger than the outer diameter of the main body 1. The various parts of the mounting base 2 are integrally formed structures. The baffle 24 can limit the installation of the mounting base 2 on the external mating structure.

[0027] The main body 1 and the mounting base 2 are fixed together by a threaded connection. Specifically, the main body 1 has a threaded hole, and the mounting base 2 has a thread that matches it, so that the threaded hole of the main body 1 can be connected to the mounting base 2 through the thread, and the two can be easily connected.

[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these all fall within the protection scope of the present utility model.

Claims

1. A pressure-holding nozzle for laser cutting, characterized in that, The device includes a main body (1), a mounting base (2), and a ceramic body (3). The main body (1) is fitted onto the outside of the mounting base (2). The mounting base (2) has a mounting hole (21). The bottom of the main body (1) has a through hole (11). The through hole (11) is connected to the mounting hole (21). The ceramic body (3) includes a limiting part (31) and a straight cylindrical part (32). The limiting part (31) is located inside the through hole (11). The straight cylindrical part (32) is located below the limiting part (31). The diameter of the mounting hole (21) is larger than the diameter of the through hole (11). The outer diameter of the straight cylindrical part (32) is smaller than the outer diameter of the limiting part (31). The outer diameter of the straight cylindrical part (32) is the same as the diameter of the through hole (11). The straight cylindrical part (32) can extend through the through hole (11). The ceramic body (3) has a hollow hole (33).

2. The pressure-holding nozzle for laser cutting according to claim 1, characterized in that, The axial length of the limiting part (31) is less than the axial length of the mounting hole (21).

3. A pressure-holding nozzle for laser cutting according to claim 2, characterized in that, The axial length of the straight cylindrical portion (32) is greater than the axial length of the through hole (11).

4. A pressure-holding nozzle for laser cutting according to any one of claims 1 to 3, characterized in that, Both ends of the hollow hole (33) are provided with guide portions (34), and the guide portions (34) are arranged in an arc shape.

5. A pressure-holding nozzle for laser cutting according to claim 4, characterized in that, The top end of the through hole (11) is provided with an inclined part (12), the diameter of the top end of the inclined part (12) is the same as the diameter of the mounting hole (21), and the diameter of the bottom end of the inclined part (12) is the same as the diameter of the through hole (11).

6. A pressure-holding nozzle for laser cutting according to claim 5, characterized in that, The upper part of the mounting base (2) is provided with a connecting part (22), and the connecting part (22) is provided with an external thread (23).

7. A pressure-holding nozzle for laser cutting according to claim 6, characterized in that, The mounting base (2) is provided with a baffle (24), which is located between the connecting part (22) and the main body (1). The outer diameter of the baffle (24) is larger than the outer diameter of the main body (1).

8. A pressure-holding nozzle for laser cutting according to claim 1, characterized in that, The main body (1) and the mounting base (2) are fixed together by threaded connection.

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