Nozzle for laser cutting

Abstract

The utility model discloses a nozzle for laser cutting, which comprises a nozzle body, the middle part of the nozzle body is provided with an airflow channel, the side surface of the nozzle body is provided with at least two heat dissipation channels, and the heat dissipation channels are arranged around the central axis of the airflow channel in an equidistant array manner; cooling cavities located outside the heat dissipation channel are formed in the side faces of the nozzle body, a water inlet pipe communicating with the cooling cavities is installed on the upper side of the outer end of the nozzle body, a water outlet pipe communicating with the bottoms of the cooling cavities is arranged in the bottom end of the nozzle body, and a water pump connected with the water outlet pipe is installed in the bottom end of the nozzle body; according to the nozzle for laser cutting, the cooling cavity located outside the heat dissipation channel is formed in the side wall of the nozzle body, heat passing through the heat dissipation channel is cooled in a water cooling mode, rising of the heat of the nozzle body is reduced, the risk of deformation of the nozzle body is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser cutting, and particularly relates to a nozzle for laser cutting. Background Art

[0002] Laser cutting is a process of irradiating a workpiece with a highly focused high-power density laser beam, causing the irradiated material to rapidly melt and vaporize. At the same time, molten substances are blown away by a high-speed gas flow coaxial with the beam, thereby realizing the process of cutting the workpiece. The nozzle is a very important component in laser cutting. It is located at the bottom end of the laser cutting head, very close to the workpiece. The focused laser and high-pressure gas are both ejected through the nozzle, playing a very crucial role.

[0003] After retrieval, a patent with the application number 202321555742.1 discloses a nozzle for laser cutting. This patent can conduct heat by opening air vents on the side wall of the nozzle body, avoiding the problem of heat accumulation. However, with this conduction method, due to the high temperature during laser cutting, as heat circulates, the heat of the nozzle will rise sharply, possibly causing deformation, thus affecting subsequent use. Utility Model Content

[0004] To solve the problems existing in the prior art, the utility model provides a nozzle for laser cutting. By arranging a cooling cavity outside the heat dissipation channel on the side wall of the nozzle body and adopting a water cooling method, the heat passing through the heat dissipation channel is cooled, reducing the rise of the heat of the nozzle body, reducing the risk of its deformation, and improving the service life.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A nozzle for laser cutting includes a nozzle body. An air flow channel is opened in the middle of the nozzle body. At least two heat dissipation channels are opened on the side surface of the nozzle body, and the heat dissipation channels are arranged at equal intervals around the central axis of the air flow channel; cooling cavities are opened on the side surfaces of the nozzle body outside the heat dissipation channels. A water inlet pipe communicated with the cooling cavity is installed on the upper side of the outer end of the nozzle body. A water outlet pipe communicated with the bottom of the cooling cavity is arranged inside the bottom end of the nozzle body. A water pump connected to the water outlet pipe is installed inside the bottom end of the nozzle body. A drain pipe is connected to the water outlet of the water pump, and the drain pipe extends to the outside of the nozzle body. Spiral fins are arranged in the cooling cavities. By arranging a cooling cavity outside the heat dissipation channel on the side wall of the nozzle body and adopting a water cooling method, the heat passing through the heat dissipation channel is cooled, reducing the rise of the heat of the nozzle body, reducing the risk of its deformation, and improving the service life.

[0007] Further, a ceramic sleeve is provided in the air flow channel. By arranging the ceramic sleeve in the air flow channel, the heat insulation between the nozzle body and the high-temperature air flow in the air flow channel is improved.

[0008] Further, a flow collector is provided at the outer end of the bottom side of the nozzle body. The side wall of the flow collector is an arc-shaped structure protruding outward, which can make the air flow generated by cutting enter the heat dissipation channel as much as possible and be discharged.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows: By arranging a cooling cavity outside the heat dissipation channel on the side wall of the nozzle body and adopting a water cooling method, the heat passing through the heat dissipation channel is cooled, the rise of the heat of the nozzle body is reduced, the risk of its deformation is reduced, the service life is improved. By arranging a ceramic sleeve in the air flow channel, the heat insulation between the nozzle body and the high-temperature air flow in the air flow channel is improved. A flow collector is provided at the outer end of the bottom side of the nozzle body, and the side wall of the flow collector is an arc-shaped structure protruding outward, which can make the air flow generated by cutting enter the heat dissipation channel as much as possible and be discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic structural diagram of the present utility model.

[0011] In the figure: 1 nozzle body, 2 air flow channel, 3 heat dissipation channel, 4 cooling cavity, 5 water inlet pipe, 6 water outlet pipe, 7 water pump, 8 drain pipe, 9 spiral fin, 10 ceramic sleeve, 11 flow collector. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0013] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. Embodiment [[ID=]]

[0014] See the appendix Figure 1As shown in the figure, a nozzle for laser cutting includes a nozzle body 1. A gas flow channel 2 is provided in the middle of the nozzle body 1. At least two heat dissipation channels 3 are provided on the side of the nozzle body 1. The heat dissipation channels 3 are arranged in an equidistant array around the central axis of the gas flow channel 2. Cooling cavities 4 are provided on the side of the nozzle body 1 outside the heat dissipation channels 3. A water inlet pipe 5 communicating with the cooling cavity 4 is installed on the upper side of the outer end of the nozzle body 1. A water outlet pipe 6 communicating with the bottom of the cooling cavity 4 is provided inside the bottom end of the nozzle body 1. A water pump 7 connected to the water outlet pipe 6 is installed inside the bottom end of the nozzle body 1. A drain pipe 8 is connected to the water outlet of the water pump 7. The drain pipe 8 extends to the outside of the nozzle body 1. Spiral fins 9 are provided in each of the cooling cavities 4. By providing the cooling cavities 4 outside the heat dissipation channels 3 on the side wall of the nozzle body 1 and adopting a water cooling method, the heat passing through the heat dissipation channels 3 is cooled, the rise of the heat of the nozzle body 1 is reduced, the risk of its deformation is reduced, and the service life is prolonged.

[0015] A ceramic sleeve 10 is provided in the gas flow channel 2. By providing the ceramic sleeve 10 in the gas flow channel 2, the heat insulation between the nozzle body 1 and the high-temperature gas flow in the gas flow channel 2 is improved.

[0016] A flow collector 11 is provided at the outer end of the bottom side of the nozzle body 1. The side wall of the flow collector 11 is an arc-shaped structure protruding outward, which can make as much of the airflow generated by cutting enter the heat dissipation channels 3 and be discharged.

[0017] Working principle: The high-temperature and high-pressure gas flow of the laser cutting machine is ejected along the gas flow channel 2 to cut the workpiece. The heat generated by cutting is discharged through the heat dissipation channels 3. When the heat passes through the heat dissipation channels 3, the external cooling water enters the cooling cavity 4 through the water inlet pipe 6 to cool the heat in the heat dissipation channels 3, reduce the rise of the heat of the nozzle body 1, reduce the risk of its deformation, and prolong the service life. By providing the spiral fins 9 in the cooling cavity 4, the time of the cooling water in the cooling cavity 4 is prolonged, and the cooling effect is improved. By providing the ceramic sleeve 10 in the gas flow channel 2, the heat insulation between the nozzle body 1 and the high-temperature gas flow in the gas flow channel 2 is improved. A flow collector 11 is provided at the outer end of the bottom side of the nozzle body 1. The side wall of the flow collector 11 is an arc-shaped structure protruding outward, which can make as much of the airflow generated by cutting enter the heat dissipation channels 3 and be discharged.

[0018] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes that fall within the meaning and scope of the equivalent elements of the claims in the present utility model, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0019] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A nozzle for laser cutting, comprising a nozzle body. An air flow channel is provided in the middle of the nozzle body, and at least two heat dissipation channels are provided on the side surface of the nozzle body. The heat dissipation channels are arranged in an equidistant array around the central axis of the air flow channel. It is characterized in that: Cooling cavities are provided on the sides of the nozzle body outside the heat dissipation channels. A water inlet pipe communicating with the cooling cavities is installed on the upper side of the outer end of the nozzle body. A water outlet pipe communicating with the bottom of the cooling cavities is provided inside the bottom end of the nozzle body. A water pump connected to the water outlet pipe is installed inside the bottom end of the nozzle body. A drain pipe is connected to the water outlet of the water pump, and the drain pipe extends to the outside of the nozzle body. Spiral fins are provided in the cooling cavities.

2. The nozzle for laser cutting according to claim 1, wherein: A ceramic sleeve is provided in the air flow channel.

3. A nozzle for laser cutting according to claim 1, characterized in that: A flow collector is provided at the outer end of the bottom side of the nozzle body, and the side wall of the flow collector is an arc-shaped structure protruding outward.

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