A method of removing a multilayered layer from a surface of an article

Abstract

The application provides a method for removing multilayer material layers on the surface of an article, comprising the following steps: establishing a processing file according to processing target data, the surface of the article to be processed is sequentially stacked with at least two layers of material layers with different materials; obtaining position data of the article to be processed, obtaining a laser focal point position according to the position data, and adjusting the processing file according to the position data; setting first processing parameters and second processing parameters according to the characteristics that the at least two layers of material layers with different materials and laser power can be set by software layering, performing first laser processing on the article to be processed according to the adjusted processing file and the first processing parameters; moving the laser focal point position upward, and performing second laser processing on the article to be processed according to the adjusted processing file and the second processing parameters; and performing quality detection on the body of the article to be processed, and taking the body of the article to be processed that passes the detection as a qualified article. The application can effectively improve the product quality of the article to be processed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser processing, in particular to a method for removing multilayer material layers on the surface of an article. BACKGROUND

[0002] OC0 coating (spraying resin liquid anti-breaking) technology can play the role of glass anti-breaking, color enhancement, clarity, and the unique touch of resin liquid oil composition, making the touch more intimate. Silk screen printing technology, on the basis of OC0 coating, uses specific silk screen printing equipment and protective oil to prepare a multilayer ink layer with high adhesion, specific light transmittance, and various ink colors, etc. Excellent performance is recognized by more and more mobile phone manufacturers.

[0003] After the glass mobile phone back cover is coated with OC0 and silk screen printed, due to the product appearance design requirements, laser is used to remove the ink layer and OC0 coating at the same time, and the glass surface and internal discoloration should not be damaged during laser processing, and the laser etching size and position degree have strict requirements to ensure the product pass rate. SUMMARY

[0004] The technical problem to be solved by the present application is that the existing process is easy to damage the glass surface and cause internal discoloration of the glass, resulting in a decrease in the product pass rate. In view of the above defects of the prior art, a method for removing multilayer material layers on the surface of an article is provided.

[0005] The technical solution adopted by the present application to solve the technical problem is: a method for removing multilayer material layers on the surface of an article is provided, comprising: obtaining processing target data of a to-be-processed article, establishing a processing file according to the processing target data, wherein the surface of the to-be-processed article body is sequentially stacked with at least two layers of material layers of different materials; obtaining position data of the to-be-processed article, obtaining a laser focal point position according to the position data, and adjusting the processing file according to the position data, so that the adjusted processing file matches the position data; setting first processing parameters and second processing parameters according to the characteristics that the at least two layers of material layers of different materials and the laser power can be set by software; performing first laser processing on the to-be-processed article according to the first processing parameters and the adjusted processing file to remove the at least two layers of material layers of different materials step by step; moving the laser focal point position upwards, and performing second laser processing on the to-be-processed article after the first laser processing according to the second processing parameters and the adjusted processing file, so as to reduce the discoloration degree of the to-be-processed article body; and performing quality detection on the to-be-processed article body, and taking the to-be-processed article body that passes the detection as a qualified article.

[0006] After the step of performing the second laser processing on the first laser-processed workpiece according to the adjusted processing file by using the second processing parameter, the method for removing the multi-layer material layer on the surface of the workpiece further comprises the following steps: performing third laser processing on the second laser-processed workpiece according to the processing file by using third processing parameter, so as to remove burrs on the edges of the at least two layers of material layers with different materials on the body of the workpiece; wherein the laser power in the third processing parameter is lower than the laser power in the second processing parameter, and is also lower than the laser power in the first processing parameter.

[0007] After the step of performing the third laser processing on the second laser-processed workpiece according to the processing file by using the third processing parameter, the method for removing the multi-layer material layer on the surface of the workpiece further comprises the following steps: performing fourth laser processing on the body of the workpiece according to the processing file by using fourth processing parameter, so as to clean dust residues on the surface of the body of the workpiece; wherein the laser power in the fourth processing parameter is lower than the laser power in the third processing parameter.

[0008] The method for removing the multi-layer material layer on the surface of the workpiece further comprises the following steps: removing smoke generated during the first laser processing, the second laser processing, the third laser processing and the fourth laser processing by blowing and / or dust extraction.

[0009] The first laser processing, the second laser processing, the third laser processing and the fourth laser processing are performed on the workpiece by using ultraviolet picosecond laser or ultraviolet femtosecond laser.

[0010] The step of performing quality detection on the body of the workpiece comprises the following steps: placing the body of the workpiece on a white base plate to obtain the discoloration degree of the body of the workpiece; and / or placing the body of the workpiece under a microscope to obtain the appearance effect of the body of the workpiece, and to measure the current processing contour size of the body of the workpiece; and determining whether the body of the workpiece can be used as a qualified product according to at least one of the discoloration degree, the appearance effect and the current processing contour size.

[0011] The processing target data comprises a target contour size, and the file size of the processing file is smaller than the target contour size.

[0012] The step of performing the second laser processing on the workpiece according to the processing file by using the second processing parameter comprises the following steps: reducing the file size of the processing file, and performing the second laser processing on the workpiece according to the reduced processing file.

[0013] Before the step of performing first laser processing on the product to be processed according to the machining map file based on the at least two different first machining parameters, the method for removing the material layer of the multi-layer coating on the surface of the product further comprises the following steps: obtaining a to-be-processed area of the product to be processed according to the position data and the machining map file, obtaining a corresponding area on a machining platform where the product to be processed is placed and corresponding to the to-be-processed area, and hollowing out the corresponding area.

[0014] The step of obtaining the position data of the product to be processed specifically comprises the following steps: obtaining a peripheral contour position of the product to be processed through an electrically coupled device camera, and obtaining a center point position of the product to be processed according to the four-edge contour position; and the step of adjusting the machining map file according to the position data specifically comprises the following steps: after the center of the machining map file is coincided with the center point position, the machining map file is rotated so as to be matched with the product to be processed in a vertical direction.

[0015] The present application has the beneficial effect that, compared with the prior art, the present application sets the first machining parameter and the second machining parameter according to the at least two layers of material of different materials of the product to be processed, adjusts the machining map file according to the position data of the product to be processed, so as to improve the laser processing precision, performs first laser processing on the product to be processed according to the adjusted machining map file according to the first machining parameter, and can effectively remove the at least two layers of material of different materials without damaging the surface of the product to be processed. In order to reduce the discoloration influence on the product to be processed caused by the first laser processing, the second laser processing is performed on the product to be processed, so as to reduce the discoloration degree of the product to be processed, thereby effectively improving the qualified rate of the product. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described below in conjunction with the drawings and embodiments, wherein:

[0017] Figure 1 is a flowchart of the first embodiment of the method for removing the multi-layer material layer on the surface of the product provided by the present application;

[0018] Figure 2 is a flowchart of the second embodiment of the method for removing the multi-layer material layer on the surface of the product provided by the present application. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] Referring to Figure 1 , Figure 1 is a flowchart of a first embodiment of a method for removing a multi-layer material layer on a surface of an article provided by the present application. The method for removing a multi-layer material layer on a surface of an article provided by the present application comprises the following steps:

[0021] S101: Obtain processing target data of an article to be processed, and establish a processing file according to the processing target data, wherein the surface of the article to be processed is sequentially stacked with at least two layers of material layers of different materials.

[0022] In a specific implementation scenario, the article to be processed and the processing target data of the article to be processed are obtained, the processing target data comprises a target appearance, a target size and other processing requirements, and the article to be processed can be a common glass article or a sapphire article. A corresponding processing file is established according to the processing target data, and the processing file comprises a marking pattern and a processing template. Further, the processing file further comprises a laser path during processing. For example, the marking pattern is a closed circle, and the laser path is an outer circle that is contracted and expanded, and then is crossed horizontally and vertically until the closed circle is filled.

[0023] In an implementation scenario, the article to be processed is a glass mobile phone back cover. The at least two layers of material layers of different materials comprise an OC0 coating and an ink layer, wherein the ink layer is stacked on the outer surface of the OC0 coating. Since the laser will cause the ink to heat and diffuse when acting on the ink, when the processing file is established according to the processing target data, the file size of the processing file is smaller than the target pattern size in the processing target data, so as to avoid that the processing size deviation caused by the heat diffusion of the ink is too large, and the product yield is affected.

[0024] In this implementation scenario, the processing file is established based on a CCD (charge coupled device) vision scheme. For example, a target image is obtained through a CCD camera first, and the target image can be an image of the surface of the article to be processed. The processing path and the processing pattern are drawn on the target image based on the processing target data, and the processing file is generated.

[0025] S102: Obtain position data of the article to be processed, obtain a laser focal point position according to the position data, and adjust the processing file according to the position data, so that the adjusted processing file matches the position data.

[0026] In one embodiment, the position data of the product to be processed is obtained by placing the product to be processed on a processing platform. The position data can be obtained by a pressure sensing device of the processing platform, or by an infrared sensor or other sensors. In this embodiment, the position data is obtained by a CCD camera. Specifically, the position data of the periphery contour of the product to be processed is obtained by the CCD camera, and the center point position of the product to be processed is obtained according to the periphery contour position. The CCD camera has a precision of 20 million pixels and a field of view of more than 40*40 mm.

[0027] The processing file is adjusted according to the position data, for example, at least one of rotation, reduction, and stretching is performed on the processing file, so that the adjusted processing file matches the position data, thereby improving the precision of laser processing on the surface of the product to be processed according to the processing file, and obtaining a processing effect that matches the user's needs without damaging the surface of the product to be processed. Specifically, the center point of the processing file is coincided with the center point position of the product to be processed, and other position points (such as the four corner points or the contour of the four edges) of the processing file are coincided with the corresponding position points of the product to be processed.

[0028] The focal length of the laser used for laser processing is adjusted according to the position data, so that the focal point position of the laser is located on the upper surface of at least two layers of material with different materials of the product to be processed, which can effectively avoid damaging the surface of the product to be processed. In this embodiment, the focal point error is ±0.1 mm. The laser used for laser processing is ultraviolet picosecond laser with a wavelength of 355 nm, a pulse width of <9 ps, or ultraviolet femtosecond laser with a shorter pulse width.

[0029] In this embodiment, the processing speed of the laser used for laser processing is 1500-2500 mm / s, the frequency is 500-1000 KHZ, the frequency is 1, the burst is 1, and the air jump speed is 1500-2500 mm / s.

[0030] In one embodiment, after obtaining the position data of the product to be processed, the processing area of the product to be processed is obtained according to the position data and the processing file, the corresponding area on the processing platform corresponding to the processing area is obtained, and the corresponding area is hollowed out. In this way, when the product to be processed is subjected to laser processing, the laser can be emitted through the hollowed-out area to avoid reflection and cause unexpected effects on the product to be processed. Further, the heat generated by laser processing can be dissipated through the hollowed-out area to avoid adverse effects of high temperature on the product to be processed. In order to ensure that the laser can be emitted, the range of the hollowed-out area can be slightly larger than the processing area to avoid the reflection phenomenon still existing due to the too small hollowed-out area.

[0031] In other implementation scenarios, in order to improve the processing efficiency, the processing platform is hollowed in advance according to the processing file and the size data of the product to be processed. When the product to be processed is placed on the processing platform, the to-be-processed area of the product to be processed is placed in correspondence with the hollowed area.

[0032] S103: According to the characteristics that the laser power can be set layer by layer by software according to the at least two layers of material with different materials, the first processing parameter and the second processing parameter are set. According to the first processing parameter, the product to be processed is processed by laser according to the processing file, so as to remove the at least two layers of material with different materials.

[0033] In a specific implementation scenario, the at least two layers of material with different materials need different power of laser to remove. The laser power needed to remove the ink layer is low, and the laser power needed to remove the OCO coating is high. In this implementation scenario, by using the characteristics that the laser power can be set layer by layer by software, different sub-processing parameters can be set for each layer of material, and at least two laser processing operations are performed on the at least two layers of material with different materials according to different sub-processing parameters. For example, first, a high-power and sparse-filling sub-processing parameter is used to perform a laser processing operation according to the processing file, to remove the ink layer and a small amount of OCO coating. Then, a high-power and dense-filling sub-processing parameter is used to perform a second laser processing operation according to the processing file, to remove the OCO coating. In other implementation scenarios, the same processing parameter can also be used to perform at least two laser processing operations on the at least two layers of material with different materials, for example, both high-power and dense-filling processing parameters are used to perform two laser processing operations to remove the ink layer and the OCO coating. In the case where the laser power is sufficient, the at least two layers of material with different materials can also be processed by laser according to the processing file, and the ink layer and the OCO coating can be removed at one time.

[0034] Therefore, the first processing parameter can be set according to the laser power required to remove the at least two layers of material with different materials, or can be set according to the highest laser power required to remove the at least two layers of material with different materials, or can be set according to the laser power required to remove the at least two layers of material with different materials at one time.

[0035] S104: Move the laser focal point position upward, and perform a second laser processing operation on the product to be processed after the first laser processing operation according to the adjusted processing file by using the second processing parameter, so as to reduce the discoloration degree of the body of the product to be processed.

[0036] In a specific implementation scenario, the body of the workpiece is formed after the first laser processing and the second laser processing. Since the ultrafast laser can induce color centers in the glass, the laser can cause the body of the workpiece to discolor during the first laser processing, affecting the visual effect of the final product. Low-temperature annealing can reduce the discoloration of the glass, so by using defocused laser for the second laser processing of the discolored workpiece, the effect of low-temperature annealing is achieved, and the discoloration of the body of the workpiece is reduced.

[0037] In the present implementation scenario, the laser focal position is adjusted upwards to 0.8-1mm defocus, avoiding the laser focal position inside the workpiece, affecting the processing effect. According to the adjusted processing file, the second processing parameters are used, for example, high power and dense filling processing parameters are used for the second laser processing of the workpiece.

[0038] In one implementation scenario, since the laser focal position is adjusted upwards, the size of the processing file needs to be reduced during the second laser processing, specifically, the size of the processing area in the processing file is reduced from the periphery to the center, to avoid the laser processing area exceeding the range that needs to be processed.

[0039] In the present implementation scenario, the dense filling interval in the processing parameters is 0.005-0.008mm, the sparse filling interval is 0.02-0.04mm, the high power is 1.20-1.60W, and the low power is 0.40-0.60W.

[0040] In the present implementation scenario, the laser used for laser processing is irradiated to the laser focal position through a beam expander, a shaping aperture, a focusing lens and a 45-degree mirror. The beam expander is a 3x beam expander, the shaping aperture is used to shape the laser beam, filter out stray light, and change the spot quality, and its diameter is 5mm. The reflectivity of the 45-degree mirror is above 99%.

[0041] S105: Quality detection is performed on the body of the workpiece, and the body of the workpiece that passes the detection is used as a qualified product.

[0042] In a specific implementation scenario, the quality of the body of the product to be processed is detected to determine whether it can be used as a qualified product. If the body of the product to be processed can be used as a qualified product, the qualified product is transmitted to the next process of production for subsequent processing. If the body of the product to be processed cannot be used as a qualified product, it is determined whether the body of the product to be processed can be repaired by secondary processing, for example, the first laser processing is performed again by laser to remove all layers of material, and if the body of the product to be processed can be repaired by secondary processing, the product to be processed is transmitted to the process department that needs to be repaired to perform the corresponding repair process. If the body of the product to be processed cannot be repaired by secondary processing, for example, the area of the removed material layer is too large, or the discoloration is too serious to be repaired, the product to be processed is transmitted to the scrap department for unified scrap processing.

[0043] As described above, in the present embodiment, the surface of the product to be processed has at least two layers of material layers of different materials, the first processing parameters are set according to the at least two layers of material layers of different materials, the first laser processing is performed on the product to be processed according to the processing file according to the first processing parameters, and the second laser processing is performed on the product to be processed in order to reduce the discoloration of the body of the product to be processed during the first laser processing. The degree of discoloration of the product to be processed can be reduced, and the qualified rate of the product can be improved.

[0044] Please refer to Figure 2 , Figure 2 is a flowchart of a second embodiment of the method for removing multiple layers of material layers on the surface of a product provided by the present application. The method for removing multiple layers of material layers on the surface of a product provided by the present application comprises the following steps:

[0045] S201: Obtain processing target data of a product to be processed, and establish a processing file according to the processing target data. The surface of the body of the product to be processed is sequentially stacked with at least two layers of material layers of different materials.

[0046] S202: Obtain position data of the product to be processed, obtain a laser focal point position according to the position data, and adjust the processing file according to the position data to match the adjusted processing file with the position data.

[0047] S203: Set first processing parameters and second processing parameters according to the characteristics that the laser power can be layered by software according to at least two layers of material layers of different materials, and perform first laser processing on the product to be processed according to the processing file according to the first processing parameters to remove the at least two layers of material layers of different materials step by step.

[0048] S204: Move the laser focal point position upward, and perform second laser processing on the product to be processed subjected to the first laser processing according to the adjusted processing file using the second processing parameters to reduce the discoloration of the body of the product to be processed.

[0049] In a specific implementation scenario, steps S201-S204 are basically the same as steps S101-S104 in the first embodiment of the method for removing the multi-layer material layer on the surface of the product provided by the application, which will not be repeated here.

[0050] S205: According to the processing file, the third laser processing parameter is used to perform third laser processing on the second laser-processed product, so as to remove the burrs on the edges of the at least two layers of different materials on the surface of the product.

[0051] In a specific implementation scenario, after the first laser processing, the at least two layers of different materials on the surface of the product will be removed, but burrs may exist on the edges of the removed material layer. In the defocusing case, according to the processing file, the third processing parameter is used to perform third laser processing on the second laser-processed product to remove the burrs. Since the laser power required to remove the burrs is low, the laser power in the third processing parameter is lower than that in the second processing parameter, and lower than that in the first processing parameter. Low-power and dense filling processing parameters can be used for laser processing, which can effectively remove the burrs on the edges.

[0052] S206: According to the processing file, the fourth processing parameter is used to perform fourth laser processing on the body of the product to clean the dust residues on the surface of the product.

[0053] In a specific implementation scenario, after the first laser processing, the second laser processing and the third laser processing of the product, the body of the product is formed. After three times of laser processing, dust may be left on the surface of the product. The fourth laser processing can be performed on the body of the product according to the processing file and the fourth processing parameter, so as to remove the dust. The laser power required to remove the dust is extremely low, so the laser power in the fourth processing parameter is lower than that in the third processing parameter. The fourth laser processing can be performed by using an ultra-low-power and sparse filling processing parameter.

[0054] In other implementation scenarios, since smoke is generated during laser processing, which affects the processing process of the product, the smoke generated during the first laser processing, the second laser processing, the third laser processing and the fourth laser processing is removed by blowing and / or dust extraction. That is, during each laser processing, blowing and / or dust extraction is mainly performed.

[0055] In an implementation scenario, blowing and / or dust extraction is achieved by a dust extraction system. The dust extraction system includes a blowing device, a dust extraction fan and a filter barrel. The air pressure of the blowing device is 0.6 Pa. The air outlet of the dust extraction fan is in communication with the filter barrel. The air extraction flow of the dust extraction fan is greater than 400 m 3 / h.

[0056] In the embodiment, the first laser processing, the second laser processing, the third laser processing and the fourth laser processing are performed on the product to be processed by using an ultraviolet picosecond laser or an ultraviolet femtosecond laser.

[0057] S207: Placing the body of the product to be processed on a white base plate, obtaining the discoloration degree of the body of the product to be processed, and / or placing the body of the product to be processed under a microscope, obtaining the appearance effect of the body of the product to be processed, and measuring the current processing contour size of the body of the product to be processed.

[0058] In a specific embodiment, the processing effect detection is performed on the body of the product to be processed to select the body of the product to be processed with qualified processing effect as a qualified product. Specifically, the body of the product to be processed is placed on a white base plate, and the discoloration degree of the body of the product to be processed is obtained. For example, the display color of the body of the product to be processed on the white base plate can be obtained, and the display color is compared with a preset color chart. If the display color density is lower than the color density of the preset color chart, it is determined that the discoloration degree of the product to be processed is qualified. The discoloration degree can be detected by the human eye to determine whether the discoloration degree is qualified, or the discoloration data can be obtained by camera shooting, and whether the discoloration degree is qualified is determined according to the discoloration data.

[0059] The body of the product to be processed is placed under a microscope, the appearance effect of the body of the product to be processed is obtained, and the current processing contour size of the body of the product to be processed is measured. For example, whether the edge burr and surface dust of the body of the product to be processed are removed clean can be detected, and whether the current processing contour size meets the preset requirement is determined. The microscope is an OMM precision microscope with a magnification of 120 times, and the size measurement error is ±0.005 mm.

[0060] S208: Determining whether the body of the product to be processed can be used as a qualified product according to at least one of the discoloration degree, the appearance effect and the current processing contour size.

[0061] In a specific embodiment, whether the body of the product to be processed can be used as a qualified product is determined according to at least one of the discoloration degree, the appearance effect and the current processing contour size.

[0062] As described above, in the embodiment, the third laser processing is performed on the product to be processed according to the third processing parameter in the processing file to remove the burrs of the edges of at least two layers of material with different materials of the product to be processed after the second laser processing, and the fourth laser processing is performed on the body of the product to be processed according to the fourth processing parameter in the processing file to clean the dust residues on the surface of the product to be processed, so that the product quality of the product to be processed can be further improved.

[0063] Different from the prior art, the surface of the product to be processed has at least two layers of material layers with different materials, a first processing parameter is set according to the at least two layers of material layers with different materials, the product to be processed is subjected to first laser processing according to the processing file according to the first processing parameter, and the product to be processed is subjected to second laser processing, so as to reduce the discoloration influence on the body of the product to be processed during the first laser processing, the discoloration degree of the product to be processed can be reduced, and the qualified rate of the product is improved.

[0064] The above is only the best embodiment of the present application, and is not used to limit the scope of the present application. Equivalent changes or modifications made within the scope of the patent application of the present application are covered by the present application.

Claims

1. A method of removing a multilayered coating from a surface of an article, characterized by, The method comprises the following steps: obtaining processing target data of a product to be processed, and establishing a processing file according to the processing target data, wherein the surface of the product body is sequentially stacked with at least two layers of material layers of different materials; obtaining position data of the product to be processed, obtaining a laser focal point position according to the position data, and adjusting the processing file according to the position data, so that the adjusted processing file matches the position data; setting first processing parameters and second processing parameters according to the characteristics that the at least two layers of material layers of different materials and laser power can be set by software layering; performing first laser processing on the product to be processed according to the first processing parameters and the adjusted processing file, to remove the at least two layers of material layers of different materials step by step; moving the laser focal point position upward, reducing the size of the processing file, and performing second laser processing on the product to be processed after the first laser processing according to the second processing parameters based on the reduced processing file, to reduce the discoloration degree of the product body; performing quality detection on the product body, and taking the product body that passes the detection as a qualified product.

2. The method of removing a surface multilayer layer of a manufactured article of claim 1, wherein, After the step of performing second laser processing on the product to be processed after the first laser processing according to the second processing parameters based on the reduced processing file, the method for removing multiple layers of material layers on the surface of a product further comprises the following steps: performing third laser processing on the product to be processed after the second laser processing according to third processing parameters based on the processing file, to remove burrs on the edges of the at least two layers of material layers of different materials on the product body; wherein the laser power in the third processing parameters is lower than the laser power in the second processing parameters, and lower than the laser power in the first processing parameters.

3. The method of removing a surface multilayer layer of a manufactured article of claim 2, wherein, After the step of performing third laser processing on the product to be processed after the second laser processing according to the third processing parameters based on the processing file, the method for removing multiple layers of material layers on the surface of a product further comprises the following steps: performing fourth laser processing on the product body according to fourth processing parameters based on the processing file, to clean dust residues on the surface of the product body; wherein the laser power in the fourth processing parameters is lower than the laser power in the third processing parameters.

4. The method of removing a surface multilayer layer of claim 3, wherein, The method for removing multiple layers of material layers on the surface of a product further comprises the following steps: removing smoke and dust generated during the first laser processing, the second laser processing, the third laser processing and the fourth laser processing by blowing and / or dust extraction.

5. The method of removing a surface multilayer layer of claim 3, wherein, The first laser processing, the second laser processing, the third laser processing and the fourth laser processing are performed on the product to be processed by using ultraviolet picosecond laser or ultraviolet femtosecond laser.

6. The method of removing a surface layer of a multilayer article of claim 1, wherein, The step of performing quality detection on the product body specifically comprises the following steps: placing the product body on a white base plate, and obtaining the discoloration degree of the product body; and / or placing the body of the product to be processed under a microscope, obtaining an appearance effect of the body of the product to be processed, and measuring a current processing contour graphic size of the body of the product to be processed; determining whether the body of the product to be processed can be used as a qualified product according to at least one of the color change degree, the appearance effect, and the current processing contour graphic size.

7. The method of removing a surface layer of a multilayer article of claim 1, wherein, The processing target data includes a target graphic size, and a graphic size of the processing file is smaller than the target graphic size.

8. The method of removing a surface multilayer layer of claim 1, wherein, Before the step of performing first laser processing on the product to be processed according to the first processing parameter and the adjusted processing file, the method for removing the multi-layer material layer on the surface of the product further includes the following steps: obtaining a processing area of the product to be processed according to the position data and the processing file, obtaining a corresponding area on a processing platform corresponding to the processing area of the product to be processed, and hollowing out the corresponding area.

9. The method of removing a surface layer of a multilayer article of claim 1, wherein, The step of obtaining the position data of the product to be processed specifically includes the following steps: obtaining a center point position of the product to be processed according to a peripheral contour position of the product to be processed obtained by an electrically coupled device camera; The step of adjusting the processing file according to the position data specifically includes the following steps: rotating the processing file so that the processing file is matched with the product to be processed in the vertical direction after the center of the processing file is coincided with the center point position.

Images