Laser scraping head

Abstract

The present application relates to the technical field of surface treatment of metal or non-metal materials, and specifically to a laser scraping head. The laser scraping head of the present invention acts on the surface of a workpiece to be processed through a beam of laser beam, and is used for cleaning and roughening the surface of the workpiece at the same time. The laser scraping head has a simple structure, can be designed in a miniaturized manner, and has better applicability. Especially in complex application scenarios such as bridge steel structures, the advantages of the laser scraping head of the present invention are more obvious; before metal welding, the use of this laser scraping process can achieve cleaning and welding at the same time, greatly improving the construction efficiency; before metal painting, the use of this laser scraping process can not only completely remove the anti-corrosion paint and rust layer on the surface, but also form a uniform roughness on the surface, providing an ideal substrate strip for painting. The laser scraping head is also provided with a detection and feedback system, which can automatically identify the operation position and judge the operation effect, and continuously learn and optimize the automatic identification and judgment functions during the working process.

Description

Technical Field

[0001] The present application belongs to the technical field of workpiece surface treatment, and in particular, relates to a laser scraping head. Background Art

[0002] Metal or non-metal materials usually need pretreatment before processing. For example, texturing technology can form tiny concave-convex structures on their surfaces to improve surface adhesion and wear resistance. Metal surfaces usually need to be cleaned and pretreated before painting or welding to ensure the quality of painting or welding. For example, there will be rust on the surface of steel components of infrastructure. Traditional rust removal methods mostly use physical or chemical methods. After cleaning, in order to enhance the adhesion of the paint, texturing treatment is also required, such as the commonly used sandblasting texturing process. Traditional processes are not only inefficient, but also easy to damage the metal surface and pollute the environment.

[0003] Chinese patent CN110420935A discloses a laser cleaning-texturing composite processing head, which uses a beam splitting and focusing device to split the laser into two beams, one for laser cleaning and the other for laser texturing, thereby realizing the composite processing of laser cleaning-texturing of materials. The technical solution of this invention patent (CN110420935A) has improved efficiency compared with traditional processes, but in essence, it is still a splicing of two processes (laser cleaning and texturing) and separate operations to achieve the cleaning and texturing effect. The device has a complex structure and a large volume, and is easily restricted by the use space and environment. The manufacturing cost and use cost are high; the operation position needs to be manually identified during the operation, and the operation effect needs to be manually detected after the operation is completed, which is inconvenient to use. Summary of the invention

[0004] The technical problem to be solved by the present invention is: to solve the deficiencies in the prior art, a laser scraping head is provided, which aims to emit a laser beam through the laser scraping head to act on the surface of the workpiece to be processed, so as to simultaneously clean and roughen the surface of the workpiece to be processed, thereby solving at least one of the above-mentioned technical problems.

[0005] A laser scraping head, which emits a laser beam to act on the surface of a workpiece to be processed, and is used for simultaneously cleaning and roughening the surface of the workpiece to be processed;

[0006] The laser scraping head is used to guide and shape the laser beam and make the modulated laser beam act on the surface of the workpiece to be processed;

[0007] The laser scraping head comprises a laser output head, a collimating mirror, a first galvanometer, a second galvanometer and a lens group;

[0008] The lens group comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are sequentially distributed along the emitting direction of the laser beam.

[0009] Preferably, in a laser scraping head of the present invention, the laser output head is horizontally placed for emitting laser, the mirror surface of the collimating mirror is arranged perpendicular to the laser beam emission direction of the laser output head, the first galvanometer is vertically placed on one side of the collimating mirror, and is used to receive the laser transmitted through the collimating mirror and reflect it out; the second galvanometer is arranged on the other side of the first galvanometer, and is used to receive the laser reflected by the first galvanometer and reflect it to the first lens again.

[0010] Preferably, in the laser scraping head of the present invention, the power density of the laser beam modulated by the laser scraping head is 50-200 MW / cm 2 , the spot size of the laser beam is 50-200um.

[0011] Preferably, in the laser scraping head of the present invention, the laser wavelength of the laser beam is 1.0-1.1 μm, and the processing speed is 3-14 m / s. 2 / h.

[0012] Preferably, a laser scraping head of the present invention further includes a feedback system, which is used to collect workpiece surface temperature information, laser beam angle and position information, and feed back the collected information to the processing unit of the laser scraping head to adjust the emission power, angle and position of the laser head.

[0013] Preferably, in a laser scraping head of the present invention, the feedback system comprises a temperature management unit, the temperature management unit comprises a temperature sensor, and the temperature sensor is used to detect the surface temperature information of the workpiece to be processed.

[0014] Preferably, in the laser scraping head of the present invention, the feedback system further comprises a gyroscope arranged on the laser scraping head for detecting the angle and position information of the laser beam.

[0015] Preferably, a laser scraping head of the present invention is also provided with a visual device, and the visual device is used to photograph and identify the surface features of the workpiece to be processed, and the surface features include the processing position identification before laser scraping and the appearance of the workpiece after laser scraping.

[0016] Preferably, a laser scraping head of the present invention is further provided with a plurality of water cooling devices therein, and the plurality of water cooling devices are respectively used for cooling the collimating mirror, the first galvanometer mirror, the second galvanometer mirror and the lens group.

[0017] Preferably, in the laser scraping head of the present invention, the workpiece to be processed includes steel and its alloys, aluminum and its alloys, copper and its alloys, plastics and ceramics, and non-metallic composite materials.

[0018] The beneficial effects of the present invention are:

[0019] (1) The laser scraping head of the present invention uses a laser beam to act on the surface of the workpiece to be processed, and is used to clean and roughen the workpiece surface at the same time. The laser scraping head has a simple structure, can be miniaturized, and has better applicability. In particular, in complex application scenarios such as bridge steel structures, the laser scraping head of the present invention has more obvious advantages;

[0020] (2) Before metal welding, the use of this laser scraping head can achieve cleaning and welding at the same time, which greatly improves the construction efficiency, especially in bridge welding operations that require fast response and high precision;

[0021] (3) Before painting the metal, the use of this laser scraping head can not only completely remove the anti-corrosion paint and rust layer on the surface, but also form a uniform roughness on the surface, providing ideal substrate conditions for painting. Compared with traditional grinding or chemical cleaning methods, this laser scraping head operation has the advantages of high efficiency and no pollution, and is more in line with modern environmental protection requirements;

[0022] (4) The laser scraping head is pollution-free and can be precisely controlled during operation, meeting the development requirements of more refined and green scraping operations;

[0023] (5) The laser scraping head is also equipped with a detection and feedback system that can automatically identify the working position and judge the working effect, and continuously learn and optimize the automatic identification and judgment functions during the working process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The technical solution of the present application is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 is a schematic diagram of the structure of the laser scraping head of Examples 1-3 of the present application;

[0026] Figure 2 is a schematic diagram of the lens assembly structure of Examples 1-3 of the present application;

[0027] Figure 3 is a schematic diagram of the working state of the laser scraping device of Examples 1-3 of the present application;

[0028] Figure 4 This is a comparison diagram of the appearance of common steel after multiple groups of laser scratching experiments in Example 3 of the present application;

[0029] Figure 5 is an enlarged view of the surface and cross section of ordinary steel before and after laser scraping in Example 3 of the present application;

[0030] The reference numerals in the figure are:

[0031] Laser output head 10, collimating lens 11, first galvanometer 12, second galvanometer 13, lens group 14, laser head 21, protective cover 22, air blowing knife 23, dust suction pipe 24, laser beam 25;

[0032] a first lens 141 , a second lens 142 , a third lens 143 , a fourth lens 144 , and a fifth lens 145 . DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention, unless otherwise specified, "multiple" means two or more.

[0035] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0036] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0037] Reference Figure 1-5 The laser scraping head of this embodiment is used to simultaneously clean and roughen the surface of the workpiece by emitting a laser beam 25 to act on the surface of the workpiece to be processed. The workpiece to be processed includes steel and its alloys, aluminum and its alloys, titanium and its alloys, plastics and ceramics, and non-metallic composite materials. In this embodiment, the workpiece to be processed is an ordinary steel plate (Q370qe steel plate).

[0038] The laser scraping head is used to guide and shape the laser beam and make the modulated laser beam act on the surface of the workpiece to be processed. The laser scraping head includes a laser output head 10 for emitting laser, a scanning actuator, a control system and a cooling device.

[0039] Specifically, refer to Figure 1 The scanning actuator includes a collimating mirror 11, a first galvanometer mirror 12, a second galvanometer mirror 13 and a lens group 14, wherein the lens group 14 includes at least one convex lens. In this embodiment, the lens group 14 includes five parallel lenses.

[0040] Reference Figure 2 In this embodiment, the lens group 14 includes a first lens 141, a second lens 142, a third lens 143, a fourth lens 144 and a fifth lens 145 which are sequentially arranged along the emitting direction of the laser beam.

[0041] Preferably, a laser scraping head of this embodiment, referring to Figure 1 The laser output head 10 is horizontally placed for emitting laser, the mirror surface of the collimator 11 is arranged perpendicular to the laser beam emission direction of the laser output head 10, the first galvanometer 12 is vertically placed on one side of the collimator 11, and is used to receive the laser transmitted from the collimator and reflect it out; the second galvanometer 13 is arranged on the other side of the first galvanometer 12, and is used to receive the laser reflected by the first galvanometer 12 and reflect it to the first lens 141 again.

[0042] During operation, the laser emitted by the laser output head 10 passes through the collimating mirror 11, is reflected on the second galvanometer 13 through the first galvanometer 12, and is reflected on the first lens 141 through the second galvanometer 13. The laser is initially focused by the first lens 141 and is projected onto the second lens 142, and is focused and shaped by the third lens 143, the fourth lens 144, and the fifth lens 145 in sequence. After the light spot is focused and reduced, it is used as a laser scraping beam on the surface of the metal material to be processed. The size of the focused and reduced light spot is 50-200um.

[0043] Preferably, in a laser scraping head of this embodiment, the cooling device includes a plurality of water cooling devices arranged in the laser scraping head, and the plurality of water cooling devices are respectively used to cool the collimating mirror 11, the first galvanometer mirror 12, the second galvanometer mirror 13 and the lens group 14.

[0044] Preferably, a laser scraping head of the present embodiment, before the laser scraping operation, identifies the substrate to be retained and the dirt and coating to be removed based on the material properties, shape and size, surface quality of the steel structure workpiece to be scraped and the painting requirements after scraping, and determines the process parameters based on the equipment and the properties of the laser beam.

[0045] Preferably, in a laser scraping head of this embodiment, other process parameter selections include the following steps:

[0046] a) Establishing the energy density threshold range by scratching the material properties;

[0047] b) Through the scratching experiment, the energy density parameters are adjusted and the damage threshold is tested;

[0048] c) Find the relationship between damage threshold and surface topography and performance;

[0049] When the energy density exceeds the damage threshold corresponding to the desired morphological characteristics, the energy density boundary of laser scratching is determined;

[0050] d) According to the results of the scratching experiment, the process parameters of laser wavelength, power density, laser duty cycle, scratching efficiency and spot diameter are selected and optimized. The calculation formula of laser power density is: Pd=P / S;

[0051] Where: Pd—laser power density, unit W / cm 2 ;

[0052] P—laser average power, unit W;

[0053] S—spot area, unit: cm 2 .

[0054] The optimal parameter range values ​​in Table 1 were obtained through multiple sets of experimental tests.

[0055]

[0056] The laser scraping head in this embodiment also includes a feedback system, which is used to collect workpiece surface temperature information, laser beam angle and position information, and feed back the collected information to the processing unit of the laser scraping head to adjust the emission power, angle and position of the laser head.

[0057] Specifically, the feedback system includes a temperature management unit, which includes a temperature sensor for detecting the surface temperature information of the metal workpiece and setting a temperature range according to the properties of the material. When the temperature of the surface of the metal workpiece exceeds the upper limit of the temperature range, during laser scraping, the processing unit of the laser scraping head will reduce the power of the laser beam or increase the duty cycle, thereby reducing the temperature of the surface of the metal workpiece and preventing damage to the workpiece.

[0058] Preferably, in a laser scraping head of the present embodiment, the feedback system also includes a gyroscope arranged on the laser head, which is used to detect the angle and position information of the laser beam, and set a laser beam rotation angle range according to the shape characteristics of the material and the working space. When the laser beam deflection angle exceeds the set range, the processing unit of the laser scraping head will correct the rotation angle of the laser beam to ensure the operation quality and safety of laser scraping.

[0059] The laser scraping head is also provided with a visual device, which includes a CCD camera for photographing and identifying the surface features of the workpiece to be processed. The surface features include the processing position recognition before laser scraping and the appearance of the workpiece after laser scraping.

[0060] The control system of the laser scraping head includes a storage unit and a comparison and judgment unit. The storage unit stores a library of dirt on the surface of the workpiece to be processed and a library of effects after the scraping operation is completed. The visual device photographs the surface of the workpiece to be processed before the operation, and identifies the position where the operation is required by comparing the dirt library of the comparison and judgment unit with that of the storage unit. The angle of the laser beam is adjusted by the first galvanometer 12 and the second galvanometer 13 to achieve precise operation. After the operation is completed, the visual device takes a picture, and compares the effect library of the comparison and judgment unit with that of the storage unit to determine whether the operation effect is qualified. When it is determined to be unqualified, it reminds manual review and judgment, and saves the newly taken pictures to their respective storage units according to the judgment results, and supplements the library of the storage unit as a comparison example for the next judgment. During the working process, the automatic judgment function is continuously supplemented and optimized.

[0061] Preferably, a laser scraping head of the present embodiment needs to be equipped with a protection system when in use. The protection system includes a protective cover 22, an air blowing device and a dust suction device. In the present embodiment, the protective cover 22 is arranged as a shell structure with a hollow bottom. When working, it covers the surface of the workpiece to close the working space. The laser head 21 is arranged on the top of the protective cover 22, and the air blowing device is arranged as an air blowing knife 23. The air blowing knife 23 blows out a high-speed air flow or an oxygen flow or a nitrogen flow to act on the scraping metal surface, so that the metal surface stripping material after the laser scraping operation is blown away from the working surface in time to improve the scraping effect. The dust suction device adopts a vacuum cleaner connected to the protective cover 22 through a dust suction pipe 24, and the dust suction pipe mouth is arranged opposite to the air blowing knife 23 to increase the discharge speed of the stripping material and exhaust gas.

[0062] A laser scraping head in this embodiment has the following specific steps of use:

[0063] Start the equipment to check whether the laser head, motion mechanism and laser operation are normal, adjust the red light mark to determine the surface treatment position, wear laser protective glasses, and ensure that there are no personnel, equipment or other dangerous goods on the laser transmission path. Perform a comprehensive inspection of the workpiece to be processed to confirm its surface condition, material type and structural integrity to ensure that it is suitable for laser scraping treatment.

[0064] Before the laser scraping work is carried out, it is carried out according to the process specification documents. According to the different surface roughness requirements of steel beams, supports and auxiliary steel structures before painting, combined with the existing experimental data of steel substrates, the laser scraping process parameter range is determined using Table 2. The laser scraping process parameters are determined after verification.

[0065]

[0066] During laser scraping, the following processing requirements must be followed: the principle of gradual processing from the near end to the far end or from the upper end to the lower end of the workpiece should be followed;

[0067] When processing thin-walled workpieces and mesh workpieces, the processing power should be controlled, and low power and multiple processing should be used to avoid deformation of the workpiece;

[0068] When the oil stain on the workpiece is thick, the oil stain can be pre-treated, and the power can be adjusted during treatment to avoid generating open flames;

[0069] Workpieces with rust or uneven coating thickness should be scraped with high power single treatment to form the surface structure in one go to avoid thermal damage accumulation and structural destruction;

[0070] The smoke and exhaust gas generated by scraping should be removed and collected on the surface by side-blowing airflow and vacuum cleaning;

[0071] Before painting, it is necessary to remove the attachments on the surface of the workpiece to avoid affecting the coating performance;

[0072] During laser scraping, the workpiece surface should be protected to prevent bumps.

[0073] The workpiece after laser scraping should be stored in a dry place; the workpiece should be painted within 6 hours after laser scraping to prevent surface rust.

[0074] After laser scraping is completed, it needs to be tested and evaluated according to the quality standards in Table 3.

[0075]

[0076] For appearance inspection, observe with the naked eye or a magnifying glass. There should be no obvious dirt or residual removal on the surface of the workpiece after laser scraping, and there should be no new cracks, scars, pits and other defects. When the user has cleanliness requirements for the workpiece, the cleanliness inspection is carried out according to the user's requirements. The qualified cleanliness measurement result range is: Sa2-Sa3.

[0077] For surface roughness testing, the surface roughness of laser-scratched workpieces shall be evaluated according to the provisions of GB / T13288.1-2008. When laser scraping is the pre-painting process, the surface roughness test after treatment should be carried out according to the process requirements of the subsequent process. The surface roughness can be measured using a probe-type profile measuring instrument or a three-dimensional optical profile measuring instrument. The range of qualified surface roughness measurement results is: Ra20-Ra100.

[0078] For coating adhesion testing, when laser scraping is used to remove sprayed coatings and surface deposited layers, as well as other coating removals with special requirements for bonding strength, the bonding strength of the re-prepared coating after laser scraping should be tested. The bonding strength between the substrate surface after laser scraping and the re-prepared coating should not be lower than the bonding strength before coating removal, and should comply with the requirements in Table 3.

[0079] For hardness testing, the hardness after laser scratching and painting should meet the user's requirements, and the specimen, surface hardness measuring instrument and test steps should comply with the requirements of GB / T6739. Hardness measurement result range: 1B-9B, HB, F, 1H-9H.

[0080] A number of experiments were also conducted to verify the selection of the operating parameters of the laser scraping head for ordinary steel surfaces, and the parameter selection of the present invention was verified by the following examples:

[0081] Example 1: Referring to Table 4, the laser wavelength in the parameters is 1.0-1.1 μm, the duty cycle is 80-100%, and the processing speed is 10-14 m 2 / h, the power density of the laser beam after modulation by the optical path system is 0.6-25MW / cm 2 , the spot size of the laser beam is 50-200um. At this time, the rust cleaning effect on the steel surface is completed, that is, after laser surface scraping, it is observed with the naked eye or a magnifying glass. There is no residue on the surface of the workpiece after laser scraping. However, the roughening effect is not obvious. The surface roughness is measured by a probe-type profile measuring instrument or a three-dimensional optical profile measuring instrument. The roughness after roughening is approximately equal to 0. The bonding strength of the re-prepared coating after laser scraping is tested. The bonding strength between the substrate surface after laser scraping and the re-prepared coating is equal to or approximately equal to the bonding strength before the coating is removed, that is, the increased adhesion is approximately equal to 0MPa.

[0082]

[0083] Example 2: Referring to Table 5, the difference from Example 2 is that the laser wavelength is 1.0-1.1 μm, the duty cycle is 50-80%, and the processing speed is 5-10 m 2 / h, the power density of the laser beam after modulation by the optical path system is 25-60MW / cm 2 , the spot size of the laser beam is 50-200um. At this time, according to the test method of Example 1, the rust cleaning effect on the surface of ordinary steel is visually observed to be complete, the texturing effect is obvious, the surface roughness of the steel after texturing is tested to be 20-50μm, and the adhesion test is greater than 3MPa.

[0084]

[0085] Example 3: Referring to Table 6, the difference from Examples 1 and 2 is that the laser wavelength is 1.0-1.1 μm, the duty cycle is 10-50%, and the processing speed is 3-8 m 2 / h, the power density of the laser beam after modulation by the optical path system is 50-76MW / cm 2 The spot size of the laser beam is 50-200um. According to the same test method as Example 1 and Example 2, the rust cleaning effect on the surface of ordinary steel is visually observed to be completed, and the texturing effect is very obvious. The surface roughness of the steel after texturing is tested to be 50-100μm, and the adhesion test is greater than 5.9MPa.

[0086]

[0087] Based on the above ideal embodiments of this application, the relevant staff can make various changes and modifications without departing from the technical concept of this application through the above description. The technical scope of this application is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A laser scraping head, characterized in that: The laser scraping head emits a laser beam to act on the surface of the workpiece to be processed, so as to simultaneously clean and roughen the surface of the workpiece to be processed; The laser scraping head is used to guide and shape the laser beam and make the modulated laser beam act on the surface of the workpiece to be processed; The power density of the laser beam modulated by the laser scraping head is 50-200 MW / cm 2 , the spot size of the laser beam is 50-200um; The laser beam has a wavelength of 1.0-1.1 μm and a processing speed of 3-14 m 2 / h; The laser scraping head comprises a laser output head (10), a collimating mirror (11), a first galvanometer mirror (12), a second galvanometer mirror (13) and a lens group (14); The lens group (14) comprises a first lens (141), a second lens (142), a third lens (143), a fourth lens (144) and a fifth lens (145) which are sequentially arranged along the direction in which the laser beam is emitted; The laser scraping head also includes a control system, which includes a storage unit and a comparison and judgment unit. The storage unit stores a library of dirt images on the surface of the workpiece to be processed and a library of images of the effects after the scraping operation is completed. The visual device photographs the surface of the workpiece to be processed before the operation, and compares the dirt image library of the comparison and judgment unit with the storage unit to identify the position where the operation is required. The angle of the laser beam is adjusted by the first galvanometer (12) and the second galvanometer (13) to achieve precise operation. The visual device is used to photograph and identify the surface features of the workpiece to be processed, wherein the surface features include the processing position recognition before laser scraping and the appearance of the workpiece after laser scraping; After the operation is completed, the visual device takes pictures, compares the effect gallery of the judgment unit with the storage unit, and determines whether the operation effect is qualified. When it is judged to be unqualified, it reminds manual review and judgment, and saves the newly taken pictures to their respective storage units according to the judgment results, and supplements the storage unit's gallery as a comparison example for the next judgment. During the working process, the automatic judgment function is continuously supplemented and optimized.

2. A laser scraping head according to claim 1, characterized in that: The laser output head (10) is horizontally arranged for emitting laser light; the mirror surface of the collimator (11) is arranged perpendicular to the direction in which the laser beam of the laser output head (10) is emitted; the first galvanometer (12) is vertically arranged on one side of the collimator (11) for receiving the laser light transmitted through the collimator and reflecting it out; and the second galvanometer (13) is arranged on the other side of the first galvanometer (12) for receiving the laser light reflected by the first galvanometer (12) and reflecting it again to the first lens (141).

3. A laser scraping head according to claim 1 or 2, characterized in that: The laser scraping head also includes a feedback system, which is used to collect workpiece surface temperature information, laser beam angle and position information, and feed the collected information back to the processing unit of the laser scraping head to adjust the emission power, angle and position of the laser head.

4. A laser scraping head according to claim 3, characterized in that: The feedback system comprises a temperature management unit, and the temperature management unit comprises a temperature sensor, and the temperature sensor is used to detect the surface temperature information of the workpiece to be processed.

5. A laser scraping head according to claim 4, characterized in that: The feedback system further comprises a gyroscope arranged on the laser scraping head for detecting the angle and position information of the laser beam.

6. A laser scraping head according to claim 5, characterized in that: A plurality of water cooling devices are also provided in the laser scraping head, and the plurality of water cooling devices are respectively used to cool the collimating mirror (11), the first galvanometer mirror (12), the second galvanometer mirror (13) and the lens group (14).

7. The laser scraping head according to claim 1, characterized in that: The workpieces to be processed include steel and its alloys, aluminum and its alloys, copper and its alloys, plastics and ceramics, and non-metallic composite materials.

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