Laser welding galvanometer protection device

Abstract

The utility model discloses a laser welding galvanometer protection device which comprises a device body detachably arranged on a galvanometer body, the device body is of a hollow structure, protection glass corresponding to a galvanometer lens is arranged on the device body, and an annular air knife is arranged on the device body where the periphery of the protection glass is located. An air pipe joint is arranged on one side of the annular air knife, an annular nozzle is arranged on the annular air knife around the periphery of the protective glass, a cavity communicated with the air pipe joint and the annular nozzle is arranged in the annular air knife, and the annular nozzle can spray air and form air flow below the protective glass. Air flow formed by the protective glass and the annular air knife doubly blocks splashes generated during laser welding, and the galvanometer lens is effectively protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding equipment and relates to a laser welding galvanometer protection device. Background Art

[0002] With the rapid development of new energy vehicles, electric drive systems are continuously striving for higher voltage and current resistance, higher power density, and higher reliability. Laser welding, a new connection technology, has emerged for the assembly and connection of IGBTs, filter capacitors, and current sensors within electric drive systems.

[0003] Laser welding technology utilizes high-energy-density lasers to melt and join parts, offering numerous advantages. Its high energy density enables rapid welding; its small heating zone allows for precise control of the weld location; its high weld depth-to-width ratio ensures weld strength; its narrow heat-affected zone minimizes impact on surrounding materials; its minimal deformation ensures dimensional accuracy; its high production efficiency makes it suitable for large-scale production; and its flexible control allows for adjustments to suit specific welding requirements.

[0004] In the laser welding process, the laser galvanometer plays a key role as an indispensable component in the welding head. However, there are currently some problems with laser welding galvanometers. The metal spatter phenomenon generated during the welding process causes some metal spatter to splash onto the lens of the galvanometer head, causing lens contamination. This contamination is not only difficult to clean, but also prevents the laser from penetrating the contaminated area, causing burns on the lens, and then damaging the galvanometer head lens. Since the galvanometer is a precision optical component, it is difficult and expensive to replace, which not only affects the welding quality of the product, but also increases production costs and maintenance difficulties. Therefore, how to solve the problem of metal spatter contaminating the galvanometer head lens during laser welding has become one of the key issues that need to be urgently solved in the application of current laser welding technology in the electric drive system of new energy vehicles. Utility Model Content

[0005] The purpose of the utility model is to provide a laser welding galvanometer protection device to solve the technical problems existing in the background technology.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] A laser welding galvanometer protection device includes a device body that is detachably mounted on the galvanometer body, the device body being a hollow structure and provided with a protective glass corresponding to the galvanometer lens, an annular air knife being provided on the device body where the periphery of the protective glass is located, an air pipe joint being provided on one side of the annular air knife, an annular nozzle being provided on the annular air knife surrounding the periphery of the protective glass, a cavity being provided in the annular air knife that connects the air pipe joint and the annular nozzle, the annular nozzle being capable of ejecting gas and forming an air flow below the protective glass.

[0008] As a further improvement of an embodiment of the present invention, a card block is provided on the outer shell of the galvanometer body, and a card slot corresponding to the card block is provided on the device body.

[0009] As a further improvement of one embodiment of the present invention, a sealing groove is provided on the device body below the card slot, and a sealing ring is provided in the sealing groove; when the device body is assembled on the galvanometer body, the sealing ring is pressed against the galvanometer body.

[0010] As a further improvement of an embodiment of the present invention, the protective glass is detachably arranged on the device body.

[0011] As a further improvement of an embodiment of the present invention, a step for placing a protective glass is provided on the annular air knife, and the annular air knife is detachably mounted on the device body.

[0012] As a further improvement of an embodiment of the present invention, the annular air knife is threadedly connected to the device body.

[0013] As a further improvement of an embodiment of the present invention, the number of the air pipe joints is at least two, and the air pipe joints are all connected to the cavity in the annular air knife.

[0014] As a further improvement of an embodiment of the present invention, the annular nozzle is composed of a plurality of continuously spaced holes.

[0015] The above technical solution has the following beneficial effects: the air flow formed by the protective glass and the annular air knife can double-block the spatter during laser welding, effectively protecting the galvanometer lens; the sealing ring can effectively fill the gap between the device body and the galvanometer body, preventing external dust, impurities, etc. from entering the interior of the protective device, thereby providing more reliable protection for the galvanometer lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0018] Figure 1 This is a structural diagram provided by the utility model.

[0019] In the picture:

[0020] 1-Device body;

[0021] 2-sealing ring;

[0022] 3-Protective glass;

[0023] 4-annular air knife;

[0024] 5-tracheal connector;

[0025] 6- annular nozzle;

[0026] 7-galvanometer body; 71-galvanometer lens. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0029] In the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings, or with reference to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention. Example

[0030] See also Figure 1 As shown, a laser welding galvanometer protection device includes a device body 1 that is detachably mounted on a galvanometer body 7. Device body 1 employs a hollow structure, providing a stable framework for the entire protection device. Protective glass 3 is provided on device body 1, corresponding to galvanometer lens 71. Protective glass 3 is made of a carefully selected material with high transparency, high strength, and high temperature resistance, providing effective protection for the galvanometer lens without affecting laser transmission.

[0031] An annular air knife 4 is installed on the device body 1, surrounding the protective glass 3. A gas pipe connector 5 is provided on one side of the annular air knife 4, which allows connection to an external air source. An annular nozzle 6 is provided on the annular air knife 4 surrounding the protective glass 3. The annular air knife 4 has a cavity connecting the gas pipe connector 5 and the annular nozzle 6. When an external air source provides gas, the gas enters the annular air knife cavity through the gas pipe connector 5 and is ejected from the annular nozzle 6. The annular nozzle 6 is capable of ejecting high-speed gas, forming a stable air flow below the protective glass 3.

[0032] Specifically, the annular nozzle is composed of a plurality of continuously spaced holes. These holes are evenly distributed on the annular air knife 4. When gas passes through, it is ejected from each hole to form a continuous and uniform air flow.

[0033] This airflow provides a crucial barrier for the protective glass 3. During the laser welding process, metal spatter often occurs, and this airflow effectively shields the protective glass from any spatter. Even if a small amount of spatter attempts to reach the protective glass, it is deflected by the airflow, preventing contamination and damage.

[0034] Furthermore, card blocks are cleverly provided on the outer shell of the galvanometer body 7. These card blocks have been precisely designed and processed to have specific shapes and sizes to ensure that they fit perfectly with the card slots on the device body 1. The card slots provided on the device body have also been carefully designed, and their positions correspond to the card blocks on the outer shell of the galvanometer body. When the protective device needs to be installed, it is only necessary to align the card slots on the device body 1 with the card blocks on the outer shell of the galvanometer body, and gently push the device body, and the card blocks will smoothly fit into the card slots, thereby achieving a firm connection between the device body and the galvanometer body. This connection method of the card blocks and the card slots is not only convenient and quick to install, but also ensures that the protective device will not fall off easily during use, providing a stable and reliable guarantee for the normal operation of the galvanometer.

[0035] In this embodiment, a sealing groove is specially provided on the device body 1 located below the card slot. The size of this sealing groove is precisely designed to ensure that it can accommodate the sealing ring 2 and enable it to exert the best sealing effect. The sealing ring placed in the sealing groove is made of high-quality material and has good elasticity and sealing. When the device body 1 is assembled on the galvanometer body 7, the sealing ring 2 will be pressed between the device body 1 and the galvanometer body 7. At this time, the sealing ring 2 can effectively fill the gap between the device body 1 and the galvanometer body 7, preventing external dust, impurities, etc. from entering the interior of the protective device, thereby providing more reliable protection for the galvanometer lens 71. At the same time, the compressed state of the sealing ring 2 also helps to enhance the connection stability between the device body 1 and the galvanometer body 7, avoid loosening or displacement during use, and ensure that the laser welding galvanometer protection device can continuously and stably exert its protective function.

[0036] In this embodiment, the protective glass 3 is detachably mounted on the device body 1. This design facilitates quick replacement of the protective glass 3 when it is damaged or contaminated, ensuring that the protective device can always function effectively and provide reliable protection for the galvanometer.

[0037] Specifically, a step is provided on the annular air knife 4 for the protective glass 3 to rest on. The dimensions of this step are precisely designed to perfectly accommodate the protective glass 3, ensuring its stability after installation. When placed on the step, the protective glass 3 remains precisely positioned and stable, providing a solid foundation for protection during the laser welding process.

[0038] The annular air knife 4 is detachably connected to the device body 1. This design allows for easy removal from the device body 1 if the annular air knife 4 malfunctions or requires maintenance. The detachable design also facilitates replacement of annular air knives of varying specifications to suit different welding requirements, enhancing the flexibility and applicability of the entire protective device.

[0039] Preferably, the annular air knife 4 is connected to the device body 1 using a threaded connection. This connection method makes installation and removal more convenient and ensures the security of the connection. When the annular air knife 4 needs to be maintained or replaced, it can be easily screwed to operate, providing convenience for the use of the laser welding galvanometer protection device.

[0040] In this embodiment, there are at least two air pipe connectors 5. These air pipe connectors 5 are distributed around the periphery of the annular air knife 4 and are all connected to the cavity within the annular air knife. The provision of multiple air pipe connectors ensures more stable and rapid entry of gas into the annular air knife cavity. When an external air source is supplied simultaneously through multiple air pipe connectors, the gas flow rate and pressure are increased, thereby making the air flow ejected from the annular nozzle more powerful, further enhancing the blocking and protective effect on the protective glass 3.

[0041] In summary, the embodiments of the present invention achieve the following technical effects: the air flow formed by the protective glass and the annular air knife provides a double barrier to the spatter during laser welding, thereby effectively protecting the galvanometer lens.

[0042] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0044] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A laser welding galvanometer protection device, characterized in that: The invention comprises a device body which is detachably mounted on a galvanometer body. The device body is a hollow structure and is provided with a protective glass corresponding to the galvanometer lens. An annular air knife is provided on the device body where the periphery of the protective glass is located. An air pipe joint is provided on one side of the annular air knife. An annular nozzle is provided on the annular air knife surrounding the periphery of the protective glass. A cavity is provided in the annular air knife which connects the air pipe joint and the annular nozzle. The annular nozzle can spray gas and form an air flow below the protective glass.

2. The laser welding galvanometer protection device according to claim 1, characterized in that: A card block is provided on the outer shell of the galvanometer body, and a card slot corresponding to the card block is provided on the device body.

3. The laser welding galvanometer protection device according to claim 2, characterized in that: A sealing groove is provided on the device body below the card slot, and a sealing ring is provided in the sealing groove; when the device body is assembled on the galvanometer body, the sealing ring is pressed tightly on the galvanometer body.

4. The laser welding galvanometer protection device according to claim 1, characterized in that: The protective glass is detachably arranged on the device body.

5. The laser welding galvanometer protection device according to claim 4, characterized in that: The annular wind knife is provided with a step for placing the protective glass, and the annular wind knife is detachably mounted on the device body.

6. The laser welding galvanometer protection device according to claim 5, characterized in that: The annular air knife is threadedly connected to the device body.

7. The laser welding galvanometer protection device according to claim 1, characterized in that: The number of the air pipe joints is at least two, and the air pipe joints are all communicated with the cavity in the annular air knife.

8. The laser welding galvanometer protection device according to claim 1, characterized in that: The annular nozzle is composed of a plurality of continuously spaced holes.

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