A laser processing method and a laser processing system using visual imaging

Abstract

The embodiment of the application belongs to the technical field of laser processing, and relates to a laser processing method using visual imaging and a laser processing system. The laser processing method using visual imaging provided by the application comprises the following steps: placing a product on a processing platform, so that a product area to be processed is in the visual imaging range of a visual imaging module; taking an image of the area to be processed by the visual imaging module; processing the taken image to obtain a processing drawing corresponding to the product area to be processed; and performing laser processing on the product according to the processing drawing by using set laser parameters. The method effectively solves the problem of poor relative position accuracy of the film material and the glass caused by the traditional film pasting method, has a simple process flow, has high relative accuracy of the edges of the film material and the glass, does not need to use high-precision film pasting equipment, and can directly assemble the product after laser processing, thereby reducing production cost and processing procedures, and meanwhile, the prepared product has high environmental tolerance and a smooth and delicate edge.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser processing, and more particularly, to a laser processing method and system using visual imaging. BACKGROUND

[0002] With the increasing intelligence of automobiles, the size of display screens in automobiles gradually increases, and various irregular profiles appear due to the diversification of interiors. In addition, the working environment of automobiles is changeable, and different driving environments and seasons need to be adapted, so high requirements are put forward for the environmental adaptability and durability of the materials used. Glass and explosion-proof film composite materials are often used as the packaging materials of the outermost layer of vehicle display screens and become part of the automotive interior. Glass materials are often used as the packaging materials of the outermost layer of vehicle display screens and become part of the automotive interior due to their high transparency and good environmental adaptability. However, glass is fragile and can easily injure people when broken in a vehicle collision, so it cannot be directly installed on an automobile for use. The current solution is to cut a piece of high-strength plastic film material (commonly known as an explosion-proof film) similar in shape to the glass, and adhere it to the surface of the glass with an adhesive to prevent the glass from shattering and injuring people.

[0003] Due to the limitations of current processing technology, the relative position accuracy between the glass and the explosion-proof film material is poor. Since glass materials are hard and brittle, they are difficult to process and have low processing accuracy. At the same time, in order to avoid the adhesive under the explosion-proof plastic film material from adhering dust and affecting the appearance, the size of the film material adhered to the surface of the glass needs to be smaller than the size of the glass to be adhered. Generally, the size difference is about 1mm, and as the size of the glass increases, the difference will further increase to 2 to 3mm. The current method of cutting the film material first and then adhering it to the surface of the glass generally has the problems of low relative position accuracy between the glass and the film material, large size difference between the film material and the glass, unattractive appearance, and easy bubble retention of the film, which cannot meet the processing requirements of complex shapes and high precision. SUMMARY

[0004] The purpose of the present application is to provide a laser processing method and system using visual imaging to solve the technical problems of low relative position accuracy between glass and film material and large size difference between film material and glass.

[0005] In order to solve the above problems, the embodiments of the present application provide the technical solutions as follows:

[0006] A laser processing method using visual imaging, comprising the following steps:

[0007] Placing the product on the processing platform so that the product area to be processed is within the visual imaging range of the visual imaging module;

[0008] taking an image of the region to be processed by the visual imaging module;

[0009] processing the taken image to obtain a processing drawing corresponding to the region to be processed of the product;

[0010] laser processing the product according to the processing drawing with the set laser parameters.

[0011] Further, before the step of placing the product on the processing platform so that the region to be processed of the product is within the visual imaging range of the visual imaging module, the method further comprises:

[0012] manufacturing a fixture for fixing the product and a lighting source according to the shape and size of the product;

[0013] installing the visual imaging module and keeping the imaging lens relatively parallel to the product.

[0014] Further, after the step of placing the product on the processing platform so that the region to be processed of the product is within the visual imaging range of the visual imaging module, and before the step of taking an image of the region to be processed by the visual imaging module, the method further comprises:

[0015] setting and debugging the visual imaging module, and the setting content includes the brightness of the light source, the aperture size of the visual imaging device, and the exposure time, so that the outline of the region to be processed is clearly imaged in the visual imaging module.

[0016] Further, the step of processing the taken image to obtain a processing drawing corresponding to the region to be processed of the product comprises:

[0017] extracting pixel point coordinates with specific contrast from the taken image by a software algorithm, connecting the pixel point coordinates in a certain order to obtain a processing drawing corresponding to the region to be processed of the product;

[0018] establishing a conversion relationship between the pixel point coordinates and the processing coordinates by measuring the mechanical coordinate positions corresponding to each pixel point in the visual imaging module, and converting the processing drawing into a processing drawing.

[0019] Further, the step of laser processing the product according to the processing drawing with the set laser parameters comprises:

[0020] editing a laser processing program according to the processing drawing, and setting parameters such as processing speed, laser frequency, and laser power;

[0021] laser processing the product according to the processing drawing with the set laser parameters.

[0022] Further, the step of taking an image of the region to be processed by the visual imaging module comprises:

[0023] The product processing area is divided into one or more areas.

[0024] Further, the laser source used in the step of laser processing the product according to the processing drawing with the set laser parameters is a picosecond laser, and the wavelength of the picosecond laser is 355 nm.

[0025] Further, the processing speed is 1200 mm / s-1800 mm / s, the laser frequency is 400 kHz-1000 kHz, and the laser power is 7 W-20 W.

[0026] To solve the above-mentioned technical problems, the embodiment of the present application also provides a laser processing system, which adopts the technical scheme as follows:

[0027] A laser processing system for the laser processing method using visual imaging as described above, the laser processing system comprises a processing platform, a control module, a visual imaging module and a laser processing module, the visual imaging module and the laser processing module are arranged on the processing platform, the visual imaging module and the laser processing module are connected with the control module, the visual imaging module is used to shoot the image of the product processing area, the control module is used to process the shot image, obtain the processing drawing corresponding to the product processing area, and the laser processing module is used to laser process the product according to the processing drawing with the set laser parameters.

[0028] Compared with the prior art, the embodiment of the present application has the following beneficial effects:

[0029] A laser processing method and a laser processing system using visual imaging, which shoot the image of the product processing area through the visual imaging module, process the shot image, generate a processing drawing, and then laser process the product according to the processing drawing with the set laser parameters, effectively solve the problem of poor relative position accuracy of the film material and the glass caused by the traditional film pasting method, the process flow is simple, the relative accuracy of the film material and the glass edge is high, high-precision film pasting equipment is not needed, the laser-processed product can be directly assembled, the production cost is reduced, the processing procedure is reduced, the environmental tolerance of the prepared product is high, and the edge is smooth and delicate. Through the high-precision visual imaging module and the intelligent comparison algorithm, the corresponding drawing can be generated according to the shape of each glass, the explosion-proof film pasted on each glass is cut to fit, not only the positioning and pasting process is saved, but also the problems such as pasting deviation and residual bubbles under the film generated in the traditional film pasting method are well solved, and the yield is improved. At the same time, the distance between the film material and the glass edge can be adjusted as needed, which is no longer restricted by the shape and the processing accuracy of the glass, creates more space for automobile interior design, and further improves the safety. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the solutions of the present application, the drawings required to be used in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0031] Figure 1 Flow chart of the laser processing method using visual imaging in the embodiment of the present application;

[0032] Figure 2 Structure schematic diagram of the laser processing system when the visual imaging module works in the embodiment of the present application;

[0033] Figure 3 Structure schematic diagram of the laser processing system when the laser processing module works in the embodiment of the present application.

[0034] Explanation of reference signs:

[0035] 1, control module; 2, visual imaging module; 3, product; 4, illumination light source; 5, laser processing module. DETAILED DESCRIPTION

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The description and claims of the application as well as the above drawings, illustrate and set forth the features of various embodiments of the present application. The terms "comprising," "having," "containing," and "including," and other similar forms are intended to be equivalent in meaning and be open ended in that an item or items followed by such forms are not meant to be limited to only consist of the recited item or items, but can additionally include other items that are not recited.

[0037] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same

[0038] In order for those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the relevant drawings.

[0039] EMBODIMENTS

[0040] As Figure 1As shown, a laser processing method using visual imaging comprises the following steps:

[0041] Placing the product on the processing platform, so that the product area to be processed is within the visual imaging range of the visual imaging module;

[0042] Taking an image of the area to be processed by the visual imaging module;

[0043] Processing the captured image to obtain a processing drawing corresponding to the product area to be processed;

[0044] Laser processing the product according to the processing drawing with the set laser parameters.

[0045] The laser processing method using visual imaging provided by the embodiment of the present application takes an image of the product area to be processed by the visual imaging module, processes the captured image to generate a processing drawing, and then laser processes the product according to the processing drawing with the set laser parameters. It effectively solves the problem of poor relative position accuracy of the film material and the glass caused by the traditional film pasting method, the process flow is simple, the relative accuracy of the film material and the glass edge is high, high-precision film pasting equipment is not required, the laser-processed product can be directly assembled, production costs are reduced, processing procedures are reduced, and the prepared product has high environmental tolerance and a smooth and delicate edge.

[0046] Laser processing technology is widely used in the processing of plastic film material due to its outstanding advantages such as non-contact and suitability for complex processing. Through a high-precision visual imaging module and an intelligent comparison algorithm, a corresponding drawing can be generated according to the shape of each glass, the explosion-proof film pasted on each glass can be adaptively cut, the positioning and pasting process is saved, and the problems such as pasting deviation and residual bubbles under the film generated in the traditional film pasting method can be well solved, thereby improving the yield. At the same time, the distance between the film material and the glass edge can be adjusted as needed, which is no longer restricted by the shape and glass processing accuracy, creating more space for automotive interior design, and further improving safety.

[0047] In the embodiment of the present application, the processing platform comprises a marble base and a motion platform, the marble base is provided with a visual imaging module and a laser processing module, the motion platform can be a three-axis motion platform, preferably, the three-axis motion platform is a three-axis linear motor motion platform, which moves between the working position of the visual imaging module and the working position of the laser processing module. The three-axis linear motor platform can be repeatedly positioned and has the advantages of high precision, which is beneficial to improve the precision of laser processing and ensure the appearance effect of product processing.

[0048] Before the step of placing the product on the processing platform so that the product area to be processed is within the visual imaging range of the visual imaging module, the method further comprises:

[0049] The fixture for fixing the product and the illumination light source are made according to the shape and size of the product;

[0050] The visual imaging module is installed, and the imaging lens is kept relatively parallel to the product.

[0051] In the embodiment, the fixture for fixing the product and the illumination light source are made according to the shape and size of the product, the shape of the fixture does not exceed the edge of the product to be processed, so as to avoid interference with the visual imaging module. When the fixture is installed, the product is kept relatively parallel to the laser processing lens, so as to avoid processing errors, that is, to ensure that the horizontal plane of the product is perpendicular to the laser. The bright light source is located below the product and the fixture, and the size of the illumination light source is greater than the product to be processed. According to the needs, the corresponding visual imaging module is selected, and when the visual imaging module is installed, the imaging lens is kept relatively parallel to the product, that is, to ensure that the horizontal plane of the product is perpendicular to the optical path of the imaging lens, so as to ensure that the visual imaging module can take clear product surface images.

[0052] In the embodiment, the wavelength and color of the illumination light source can be replaced according to different product characteristics, the illumination light source includes at least two light sources, and the product is illuminated from different angles, respectively. The multiple light sources illuminate the product surface from different angles to ensure that the visual imaging module can accurately obtain the surface image of the product.

[0053] In the embodiment, the visual imaging module includes a camera and a lens, the lens can be a super-DOF telecentric lens, and the sensitive interval of the visual imaging module can be replaced according to different product characteristics. The camera with super-high pixels can reduce distortion, and the super-DOF telecentric lens can obtain the topography of the product surface, which helps to improve the processing precision. In addition, for the processing of large-size products, the camera with super-high pixels can obtain the local details of the product, which is convenient for magnification operation and meets the processing requirements.

[0054] The step of placing the product on the processing platform so that the product to be processed is in the visual imaging range of the visual imaging module includes:

[0055] The assembled product and the fixture are placed on the processing platform, the visual imaging module is turned on, the height of the visual imaging module is adjusted, and the product to be processed is in the visual imaging range of the visual imaging module.

[0056] In the embodiment, the product to be processed can be entirely in the visual imaging range of the visual imaging module, or partially in the visual imaging range of the visual imaging module.

[0057] After the step of placing the product on the processing platform so that the product to be processed is in the visual imaging range of the visual imaging module, and before the step of taking an image of the area to be processed by the visual imaging module, the following steps are further included:

[0058] The visual imaging module is debugged, and the debugging content includes the brightness of the light source, the aperture size of the visual imaging module, the exposure time length, etc., so that the profile of the region to be processed is imaged clearly and sharply in the visual imaging module.

[0059] The step of capturing the image of the region to be processed by the visual imaging module comprises:

[0060] The product region to be processed is divided into one or more regions.

[0061] In the embodiment of the application, the visual imaging module captures the image of the product region to be processed, which can capture the whole product region to be processed at one time or capture each part of the product region to be processed in multiple times. When the product region to be processed is divided into multiple regions, the whole product region to be processed is captured in multiple times, and the image is collected and processed to synthesize the whole product region to be processed, and then laser processing is performed to realize non-overlapping processing and ensure the appearance effect of product processing. The laser processing method is suitable for processing of large-size products.

[0062] The step of processing the captured image to obtain the processing drawing corresponding to the product region to be processed comprises:

[0063] Through a certain software algorithm, the pixel point coordinates with specific contrast are extracted from the captured image, and the pixel point coordinates are connected in a certain order to obtain the processing drawing corresponding to the actual product region to be processed;

[0064] The conversion relationship between the pixel point coordinates and the processing coordinates is established by measuring the mechanical coordinate positions corresponding to each pixel point in the visual imaging module, and the processing drawing is converted into the processing drawing that can guide laser processing.

[0065] The step of performing laser processing on the product according to the processing drawing with the set laser parameters comprises:

[0066] The laser processing program is edited according to the processing drawing, and the processing speed, laser frequency, laser power and other parameters are set;

[0067] The product is processed by laser according to the processing drawing with the set laser parameters.

[0068] In the embodiment of the application, the processing speed is 1200mm / s-1800mm / s, the laser frequency is 400kHz-1000kHz, and the laser power is 7W-20W.

[0069] In the embodiment of the present application, the laser light source can be a picosecond laser, and the picosecond laser can be an ultraviolet picosecond laser with a wavelength of 355 nm. Since the heat effect generated in the ultraviolet laser processing process is small, the product will not be deformed due to heating, and the energy consumption of the laser processing module is reduced, thereby saving the processing cost. In other embodiments, the laser light source can also be other types of lasers.

[0070] The laser processing method using visual imaging provided by the embodiment of the present application comprises the following steps: a fixture and an illumination light source for fixing a product are made according to the shape and size of the product, a suitable visual imaging module is selected, the visual imaging module is installed, and the imaging lens is kept relatively parallel to the product, the visual imaging module is debugged, the debugging content includes the brightness of the light source, the aperture size of the visual imaging module, the exposure time, etc., so that the outline of the region to be processed is clearly imaged in the visual imaging module, the assembled product and the fixture are placed on the processing platform, the visual imaging module is turned on, and the height of the visual imaging module is adjusted so that the region to be processed of the product is within the visual imaging range of the visual imaging module; the visual imaging module captures an image of the region to be processed, a certain software algorithm is used to extract the pixel point coordinates with a specific contrast from the captured image, the pixel point coordinates are connected in a certain order, and a processing graph corresponding to the region to be processed of the actual product is obtained; the conversion relationship between the pixel point coordinates and the processing coordinates is established by measuring the mechanical coordinate positions corresponding to each pixel point in the visual imaging module, the processing graph is converted into a processing drawing that can guide laser processing, a laser processing program is edited according to the processing drawing, and parameters such as processing speed, laser frequency, and laser power are set; after the product outline is extracted by the visual imaging module, the product is moved to the laser processing module, and the product is processed by laser according to the processing drawing with the set laser parameters. The above method effectively solves the problem of poor relative position accuracy of the film material and the glass caused by the traditional film pasting method, the process flow is simple, the relative accuracy of the film material and the glass edge is high, high-precision film pasting equipment is not required, the product after laser processing can be directly assembled, the production cost is reduced, the processing process is reduced, and the prepared product has high environmental tolerance and a smooth and delicate edge.

[0071] To solve the above technical problems, the embodiment of the present application further provides a laser processing system, which adopts the technical scheme as follows:

[0072] A laser processing method system, such as Figure 2 and Figure 3As shown, the laser processing method using visual imaging as described above comprises a processing platform, a control module 1, a visual imaging module 2, an illumination light source 4 and a laser processing module 5, the visual imaging module 2 and the laser processing module 5 are arranged on the processing platform, the visual imaging module 2 and the laser processing module 5 are connected with the control module 1, the visual imaging module 2 is used to shoot the image of the region to be processed of the product 3, the control module 1 is used to process the shot image, obtain and the processing drawing corresponding to the region to be processed of the product 3, and the laser processing module 5 is used to process the product 3 according to the processing drawing with the set laser parameters.

[0073] The laser processing method system using visual imaging provided by the embodiment of the application selects a suitable visual imaging module 2, installs the visual imaging module 2, and makes the imaging lens keep relatively parallel with the product 3, debugs the visual imaging module 2, the debugging content includes the brightness of the light source, the aperture size of the visual imaging module 2, the exposure time and the like, so that the outline of the region to be processed is clearly and sharply imaged in the visual imaging module 2, places the assembled product 3 and the clamp on the processing platform, turns on the visual imaging module 2, adjusts the height of the visual imaging module 2, so that the region to be processed of the product 3 is in the visual imaging range of the visual imaging module 2, the visual imaging module 2 shoots the image of the region to be processed, extracts the pixel point coordinates with specific contrast from the shot image through certain software algorithm, connects each pixel point coordinate according to certain order, obtains the processing figure corresponding to the region to be processed of the actual product 3, establishes the conversion relationship between the pixel point coordinates and the processing coordinates through measuring the mechanical coordinate positions corresponding to each pixel point in the visual imaging module 2, converts the processing figure into the processing drawing which can guide the laser processing, edits the laser processing program according to the processing drawing, sets the processing speed, the laser frequency, the laser power and the like, and after the visual imaging module 2 extracts the outline of the product 3, moves the product 3 to below the laser processing module 5, processes the product 3 according to the processing drawing with the set laser parameters. The method effectively solves the problem of poor relative position accuracy of the film material and the glass caused by the traditional film pasting method, the process flow is simple, the relative accuracy of the film material and the glass edge is high, high-precision film pasting equipment is not needed, the product 3 after laser processing can be directly assembled, the production cost is reduced, the processing procedure is reduced, the prepared product 3 has high environmental tolerance and smooth and delicate edge.

[0074] Obviously, the above-described embodiments are only some embodiments but not all the embodiments of the present application, and the preferred embodiments of the present application are given in the drawings, but not limit the patent scope of the present application. The present application can be implemented in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing specific embodiments, or make equivalent replacements to some technical features therein. Any equivalent structure made by using the content of the present application specification and drawings, directly or indirectly applied to other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A laser processing method using visual imaging, characterized by, Specifically applied to the processing of automobile glass explosion-proof film material, corresponding drawings are generated according to the shape of each glass, and the explosion-proof film pasted on each glass is cut according to the drawings, including the following steps: Place the product on the processing platform so that the product area to be processed is within the visual imaging range of the visual imaging module; Capture an image of the area to be processed by the visual imaging module; Process the captured image to obtain a processing drawing corresponding to the product area to be processed; Laser process the product according to the processing drawing with the set laser parameters; The step of processing the captured image to obtain a processing drawing corresponding to the product area to be processed includes: Extract specific contrast pixel coordinates from the captured image using a software algorithm, connect the pixel coordinates in a certain order to obtain a processing drawing corresponding to the product area to be processed; Establish a conversion relationship between pixel coordinates and processing coordinates by measuring the mechanical coordinates of each pixel in the visual imaging module, and convert the processing drawing into a processing drawing.

2. The laser processing method using visual imaging according to claim 1, wherein Before the step of placing the product on the processing platform so that the product area to be processed is within the visual imaging range of the visual imaging module, it further includes: According to the shape and size of the product, make a fixture for fixing the product and a lighting source; Install the visual imaging module and keep the imaging lens relatively parallel to the product.

3. The laser processing method using visual imaging according to claim 1, wherein After the step of placing the product on the processing platform so that the product area to be processed is within the visual imaging range of the visual imaging module, and before the step of capturing an image of the area to be processed by the visual imaging module, it further includes: Set up and debug the visual imaging module, including setting the brightness of the light source, the aperture size of the visual imaging device, and the exposure time, so that the outline of the area to be processed is clearly imaged in the visual imaging module.

4. The laser processing method using visual imaging according to claim 1, wherein The step of laser processing the product according to the processing drawing with the set laser parameters includes: Edit the laser processing program according to the processing drawing, set the processing speed, laser frequency, and laser power parameters; Laser process the product according to the processing drawing with the set laser parameters.

5. The laser processing method using visual imaging according to claim 1, wherein The step of capturing an image of the area to be processed by the visual imaging module includes: Divide the product area to be processed into one or more areas.

6. The laser processing method using visual imaging according to claim 1, wherein In the step of laser processing the product according to the processing drawing with the set laser parameters, the laser source used is a picosecond laser, and the wavelength of the picosecond laser is 355 nm.

7. The laser processing method using visual imaging according to claim 4, wherein The processing speed is 1200mm / s-1800mm / s, the laser frequency is 400kHz-1000kHz, and the laser power is 7W-20W.

8. A laser processing system for the laser processing method using visual imaging according to any one of claims 1-7, characterized in that, The laser processing system comprises a processing platform, a control module, a visual imaging module and a laser processing module, the visual imaging module and the laser processing module are arranged on the processing platform, the visual imaging module and the laser processing module are connected with the control module, the visual imaging module is used for shooting the image of the product area to be processed, the control module is used for processing the shot image, obtaining and the product area to be processed corresponding processing drawing, and the laser processing module is used for laser processing of the product according to the processing drawing with the set laser parameters.

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