Protective device for laser engraving

Abstract

The utility model relates to a kind of protective devices for laser engraving, comprising: laser, direction is controlled by laser galvanometer, laser field mirror focuses, and etching mark is engraved on the surface of metal workpiece;Further comprising: protective lens, for the lens of being sleeved in the outer side of the laser field mirror;Protective assembly, for fixed or detachably connected on the laser, is sleeved in the outer circumferential side of the protective lens, the circumferential closed passageway of the protective lens towards the mark;Wind blade component, for being located the outer side of the protective assembly, one group or multiple groups are formed in the protective assembly passageway normal direction The device of wind curtain, beneficial effect is: the physical block of being set in laser path circumferential side, prevent dust from the influence of laser, while avoiding in etching process, molten metal splashes on protective lens, cause damage to protective lens.

Description

Technical Field

[0001] This utility model relates to a laser etching device for quality traceability of ductile iron pipes, specifically a protective device for laser engraving. Background Technology

[0002] With the rapid development of laser application technology, many advanced enterprises have successfully introduced high-precision laser surface engraving technology into modern casting production lines to achieve intelligent marking of castings. This technology not only ensures clear marking and efficient identification, but also enables accurate collection and efficient interaction of product quality traceability data through seamless integration with Manufacturing Execution Systems (MES).

[0003] However, in practical industrial applications, protective lenses, as the optical interface in a laser system that comes into direct contact with the external environment, consistently face the technical bottleneck of mirror contamination. While trace amounts of dust have a limited impact on laser beam transmission under normal operating conditions, in extreme industrial environments such as foundries, high concentrations of dust and metal splashes pose a serious threat to traditional open-type laser systems. Suspended particulate matter and molten slag splashes easily adhere to and even damage optical mirrors. Even when the equipment is placed in a relatively clean indoor environment, the protective lens will continue to be contaminated and worn due to the random diffusion of suspended particles. This condition not only significantly reduces the operational stability of the laser system but also drastically shortens the lifespan of critical optical components and increases maintenance costs.

[0004] Therefore, developing a protective lens solution for field lenses suitable for high-dust industrial environments has become an urgent need in the field of laser industrial applications. Summary of the Invention

[0005] In order to overcome the impact of industrial environment and metal spatter on laser etching system in the prior art, this utility model adopts the form of setting physical protection around the laser path and setting an air curtain in the normal direction of the laser path to protect the laser system in the laser etching process.

[0006] The technical solution adopted in this utility model is: a protective device for laser engraving, comprising:

[0007] A laser, with its direction controlled by a laser galvanometer and its focus by a laser field lens, etches marks on the surface of a metal workpiece.

[0008] Also includes:

[0009] The protective lens is a lens that is fitted onto the outside of the laser field mirror;

[0010] The protective component is fixedly or detachably connected to the laser, sleeved on the outer periphery of the protective lens, and forms a circumferentially closed passage from the protective lens toward the mark;

[0011] A wind blade assembly is a device located outside the protective assembly, consisting of one or more sets forming an air curtain in the normal direction of the protective assembly's diameter.

[0012] Furthermore,

[0013] The protective component is a pipe with a polygonal, circular, or elliptical cross-section.

[0014] Furthermore,

[0015] The protective component is a multi-section, detachable assembly structure.

[0016] Furthermore,

[0017] The protective component is fixed by interlocking multiple assembled structures.

[0018] Furthermore,

[0019] The protective component has a circular cross-section and is a two-section plug-in assembly structure;

[0020] The protective components include:

[0021] The first protective component is located near the protective lens side;

[0022] A second protective component is located near the marked side;

[0023] The wind blade assembly forms an air curtain at the end of the second protective assembly near the marked side, and / or forms an air curtain at the gap formed between the first and second protective assemblies.

[0024] Furthermore,

[0025] The wind blade assembly includes:

[0026] The support is a rigid support with one end fixed to the laser and the other end facing the protective component;

[0027] The wind blade, which is an air outlet capable of forming an air curtain, is fixedly installed on the support.

[0028] The support portion is located on the outside of the protective assembly.

[0029] Furthermore,

[0030] The width of the wind curtain formed by the wind blade is greater than the width of the protective component.

[0031] Furthermore,

[0032] The metal workpiece is a ductile iron pipe;

[0033] Furthermore,

[0034] The laser forms the mark on the vertical surface of the end of the ductile iron pipe socket.

[0035] Furthermore,

[0036] The etching depth is greater than one millimeter.

[0037] The advantages of this invention over the prior art are as follows: 1) By using physical barriers set around the laser path, dust is prevented from affecting the laser, and molten metal is prevented from splashing onto the protective lens during the etching process, thus avoiding damage to the protective lens; 2) An air curtain is set in the normal direction of the laser path to block metal slag or dust from entering the physical barrier; 3) The protective components are set as a detachable structure, making it more convenient to replace the protective lens or wipe off any adhering substances. Attached Figure Description

[0038] Figure 1 This is an axial view of a specific embodiment of the present utility model;

[0039] Figure 2 This is a schematic diagram illustrating the separation and connection methods of the protective components according to a specific embodiment of this utility model;

[0040] Figure 3 This is a front view of a specific embodiment of the present utility model;

[0041] The annotation is represented as follows:

[0042] 100 - Laser; 110 - Protective lens

[0043] 200 - Protective component; 210 - First protective element; 220 - Second protective element;

[0044] 300 - Wind blade assembly; 310 - Support section; 320 - Wind blade. Detailed Implementation

[0045] The technical solutions in the embodiments are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] To overcome the impact of industrial environment and metal spatter on laser etching systems in existing technologies, this invention employs physical protection around the laser path and an air curtain along the laser path normal, thereby protecting the laser system during the laser etching process. Please refer to [link to relevant documentation]. Figures 1 to 3 The technical solution adopted in this specific embodiment is: a protective device for laser engraving, comprising:

[0047] Laser 100, with direction controlled by laser galvanometer and focus of laser field lens, etches marks on the surface of metal workpiece;

[0048] Please see Figure 1 It also includes:

[0049] The protective lens 110 is a lens that is fitted onto the outside of the laser field lens; generally, the protective lens is a set of lenses that are slightly larger than the laser field lens, covering the outside of the laser field lens, and is detachably connected to the laser 100.

[0050] The protective component 200 is fixedly or detachably connected to the laser 100 and sleeved on the outer periphery of the protective lens 110, forming a circumferentially closed passage from the protective lens 110 toward the mark. In this embodiment, the protective component 200 has two sections. Therefore, the section closest to the protective lens 110 can be fixed to the laser 100. When fixed to the laser 100, this section of the protective component 200 should not be too long, so that it is easy for personnel or tools to reach in, disassemble, or wipe the protective lens 110. Of course, it should also be feasible if it is a single section that meets the maintenance needs.

[0051] The wind blade assembly 300 is a device located outside the protective assembly 200, forming one or more air curtains along the normal direction of the protective assembly 200's diameter. The air source for the wind blade assembly 300 can generally be provided by an external system, or it can be achieved using its own pressure control equipment.

[0052] In other embodiments,

[0053] The protective component 200 is a pipe with a polygonal, circular, or elliptical cross-section. The purpose of the protective component 200 is to form physical protection around the laser path. Therefore, the structure of the protective component 200 can be modified to meet different requirements in different operating conditions.

[0054] In other embodiments, to improve ease of maintenance,

[0055] The protective component 200 is a multi-section, detachable assembly structure.

[0056] In other embodiments, preferably,

[0057] The protective component 200 is fixed by interlocking multiple sections.

[0058] Please see Figure 1 and Figure 2 In the embodiment shown in the accompanying drawings,

[0059] The protective component 200 has a circular cross-section and is a two-section plug-in assembly structure;

[0060] The protective component 200 includes:

[0061] The first protective component 210 is located near the protective lens 110.

[0062] The second protective component 220 is located near the marked side;

[0063] The wind blade assembly 300 forms an air curtain at the end of the second protective assembly 220 near the marked side, and / or forms an air curtain at the gap formed between the first protective assembly 210 and the second protective assembly 220.

[0064] In this embodiment, multiple protection schemes are provided, including forming an air curtain at the end, forming an air curtain between two protective components 200, or a combination of the above two schemes. The selectivity of redundant protection is enhanced based on the etching intensity, or the kinetic energy of metal splashes, and the contamination level of the operating conditions. If there are multiple sections, the configuration can be adjusted as needed. In this embodiment, an air curtain is only provided at the end for ease of understanding and explanation.

[0065] Please see Figure 1 In some embodiments,

[0066] The wind blade assembly 300 includes:

[0067] The support part 310 is a rigid support with one end fixed to the laser 100 and the other end facing the protective component 200;

[0068] The wind blade 320 is an air outlet that can form an air curtain and is fixedly installed on the support 310;

[0069] The support portion 310 is located outside the protective component 200.

[0070] In other embodiments, to improve blocking efficiency, preferably...

[0071] The width of the wind curtain formed by the wind blade 320 is greater than the width of the protective component 200. Of course, in some embodiments, multiple protective components 200 and multiple sets of wind blade components 300 can also be arranged in a maze to achieve the blocking effect.

[0072] In some embodiments, the corresponding etching condition is as follows:

[0073] The metal workpiece is a ductile iron pipe;

[0074] Preferably, the corresponding etching position is,

[0075] The laser 100 forms the mark on the vertical surface of the end of the ductile iron pipe socket.

[0076] To facilitate subsequent processes and product use

[0077] The etching depth is greater than one millimeter. The etching depth determines the intensity of metal sputtering. The technical solutions described in the above embodiments can be adjusted according to the etching depth to flexibly meet the needs of laser system protection.

[0078] In specific implementation: Laser 100 uses the principle of laser etching to etch marks on the vertical surface of the ductile iron pipe socket. During the etching process, the kinetic energy of laser 100 and the different etched characters will generate metal spatter. The metal slag that affects the protective lens 110 is mainly the residue that splashes upwards. This residue may adhere to the protective lens 110. At the same time, due to the complexity of the foundry workshop conditions, there will be a large amount of dust. When too much dust accumulates, it will have an adverse effect on the laser system. At this time, a protective component 200 is set in the laser path. The multi-section protective component 200 forms a certain protective space in the laser path to prevent dust and metal slag from entering. When maintenance requires replacement or wiping of the protective lens 110, the multi-section structure of the protective component 200 can be used, or in some embodiments, adjacent protective components 200 are plugged in. The outer protective component 200 can be disassembled for manual maintenance of the protective lens 110, so as to achieve both protection and easy maintenance.

[0079] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A protective device for laser engraving, comprising: A laser (100) is used to etch marks on the surface of a metal workpiece by controlling the direction of a laser galvanometer and focusing the laser field lens. Its characteristic is that it further includes: The protective lens (110) is a lens that is sleeved on the outside of the laser field mirror; The protective component (200) is fixedly or detachably connected to the laser (100), sleeved on the outer periphery of the protective lens (110), and forms a circumferentially closed passage from the protective lens (110) toward the mark; The wind blade assembly (300) is a device located outside the protective assembly (200) that forms an air curtain in the normal direction of the diameter of the protective assembly (200).

2. The protective device for laser engraving according to claim 1, characterized in that, The protective component (200) is a pipe with a polygonal, circular, or elliptical cross-section.

3. The protective device for laser engraving according to claim 2, characterized in that, The protective component (200) is a multi-section, detachable assembly structure.

4. The protective device for laser engraving according to claim 3, characterized in that, The protective component (200) is fixed by interlocking multiple sections.

5. The protective device for laser engraving according to claim 4, characterized in that, The protective component (200) has a circular cross-section and is a two-section plug-in assembly structure; The protective component (200) includes: The first protective component (210) is located near the protective lens (110); The second protective component (220) is located near the marked side; The wind blade assembly (300) forms an air curtain at the end of the second protective assembly (220) near the marked side, and / or forms an air curtain at the gap formed between the first protective assembly (210) and the second protective assembly (220).

6. The protective device for laser engraving according to claim 1, characterized in that, The wind blade assembly (300) includes: The support (310) is a rigid support with one end fixed to the laser (100) and the other end facing the protective assembly (200); The wind blade (320) is an air outlet that can form an air curtain and is fixedly installed on the support (310); The support (310) is located outside the protective assembly (200).

7. The protective device for laser engraving according to claim 6, characterized in that, The width of the air curtain formed by the wind blade (320) is greater than the width of the protective component (200).

8. The protective device for laser engraving according to any one of claims 1-7, characterized in that, The metal workpiece is a ductile iron pipe.

9. The protective device for laser engraving according to claim 8, characterized in that, The laser (100) forms the mark on the vertical surface of the end face of the ductile iron pipe socket.

10. The protective device for laser engraving according to claim 9, characterized in that, The etching depth of the mark is greater than one millimeter.

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