CN117283160A - Method for cutting laser film material with automatic track planning during edge inspection - Google Patents
Method for cutting laser film material with automatic track planning during edge inspection Download PDFInfo
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- CN117283160A CN117283160A CN202311438455.7A CN202311438455A CN117283160A CN 117283160 A CN117283160 A CN 117283160A CN 202311438455 A CN202311438455 A CN 202311438455A CN 117283160 A CN117283160 A CN 117283160A
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- cutting
- glass workpiece
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- glass
- film material
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- 238000005520 cutting process Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000007689 inspection Methods 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 title claims abstract description 21
- 239000011521 glass Substances 0.000 claims abstract description 107
- 230000001681 protective effect Effects 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims abstract description 10
- 239000004568 cement Substances 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 10
- 238000005457 optimization Methods 0.000 description 8
- 229920002799 BoPET Polymers 0.000 description 2
- 239000002313 adhesive film Substances 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003708 edge detection Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/0869—Devices involving movement of the laser head in at least one axial direction
- B23K26/0876—Devices involving movement of the laser head in at least one axial direction in at least two axial directions
- B23K26/0884—Devices involving movement of the laser head in at least one axial direction in at least two axial directions in at least in three axial directions, e.g. manipulators, robots
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/16—Programme controls
- B25J9/1656—Programme controls characterised by programming, planning systems for manipulators
- B25J9/1664—Programme controls characterised by programming, planning systems for manipulators characterised by motion, path, trajectory planning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
- B23K2103/54—Glass
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Robotics (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention relates to a laser film cutting method for automatically planning a track during edge inspection. The method for cutting the laser film material for automatically planning the track during the edge inspection comprises the following steps of obtaining a glass workpiece of a film to be cut, wherein the glass workpiece of the film to be cut is formed by sequentially stacking and applying OCA optical cement and PET protective films from low to high on the upper surface of the glass workpiece, and the PET protective film is pressed on the lower surface of the glass workpiece; obtaining image data of a glass workpiece of a film to be cut, and obtaining position coordinate data of the glass workpiece based on the image data of the glass workpiece of the film to be cut; obtaining film cutting path coordinates based on the position coordinate data of the glass workpiece; driving a cutter or the glass workpiece to move based on the film cutting path coordinates, wherein the cutter cuts the film on the surface of the glass workpiece in a cutting path; the method for cutting the laser film material with the automatic track planning during edge inspection can provide higher-precision film material cutting.
Description
Technical Field
The invention belongs to the technical field of glass film cutting, and particularly relates to a laser film cutting method capable of automatically planning a track during edge inspection.
Background
After the film is coated on the glass product in the prior art, the residual material of the film needs to be cut off. Generally, the upper surface of transparent glass is covered with OCA optical cement and PET protective film, the lower surface is covered with a layer of PET protective film, and redundant film materials are required to be removed along the edge of the glass, because the precision difference between the initial different pieces of glass can reach hundred micrometers, in the prior art, a mode of cutting according to a target grabbing reinforcement fixed drawing is generally adopted, and the precision is difficult to guarantee in the mode.
Disclosure of Invention
The invention aims to solve the problems and provide a laser film cutting method with simple structure and reasonable design for automatically planning tracks during edge inspection.
The invention realizes the above purpose through the following technical scheme:
a method for cutting a laser film material for automatically planning a track during edge inspection, which comprises the following steps,
obtaining a glass workpiece with a film to be cut, wherein the glass workpiece with the film to be cut is formed by sequentially stacking and applying OCA optical cement and PET protective films on the upper surface of the glass workpiece from low to high, and pressing the PET protective films on the lower surface of the glass workpiece;
obtaining image data of a glass workpiece of a film to be cut, and obtaining position coordinate data of the glass workpiece based on the image data of the glass workpiece of the film to be cut;
obtaining film cutting path coordinates based on the position coordinate data of the glass workpiece;
and driving a cutter or the glass workpiece to move based on the coordinates of the film cutting path, wherein the cutter cuts the film on the surface of the glass workpiece in the cutting path.
It should be noted that, corresponding cutting drawings can be obtained for each product individually, and the cutting paths of different products can be dynamically adjusted to improve the precision of the cut products; the invention can provide higher precision when cutting PET films and OCA optical adhesive films on the upper and lower surfaces of glass, and control the cutting heat influence within 30 um.
According to the method, the device and the system, based on the positions of the glass workpieces, image data of four sides of the glass workpieces are obtained, edge data of the glass workpieces are obtained through fitting based on the image data of the four sides, and peripheral edge line data of the glass workpieces are obtained based on the edge data of the glass workpieces.
It should be noted that, in this embodiment, the corresponding calculation is generally performed by a visual processing algorithm, and specifically, an implementation manner is provided herein, and of course, in actual use, other existing manners may also be adopted to implement the corresponding edge determination: capturing an image or point cloud data of the glass workpiece using a camera or laser scanner; determining the position and posture of the glass workpiece using image processing or point cloud processing techniques, such as feature extraction, object detection or point cloud segmentation; for image data, extracting four edges of the glass workpiece using image processing techniques; edge detection algorithms (e.g., canny edge detection) can be used to detect edges in the image; ensuring that the extracted edges contain all four edges of the glass workpiece; for each edge, a curve fitting algorithm (e.g., RANSAC or least squares) is used to fit the curve of the edge; this will generate a series of coordinates of edge points representing edge data of the glass workpiece; for the edge data obtained by fitting, a straight line fitting algorithm (such as Hough transformation) is used for fitting a straight line; this will provide the start and end coordinates of each edge line, representing the data of the peripheral edge lines of the glass workpiece.
As a further optimization scheme of the invention, the image data of four edges of the glass workpiece are collected based on a line scanning camera.
The line scan camera in this solution is a special type of camera, and has several advantages over conventional area scan cameras: the line scan camera is capable of image capture at very high speeds. It uses a linear sensor that scans continuously along the direction of motion of the object being photographed, so that an image of the entire scene can be captured in a very short time. This makes the line scan camera well suited for image acquisition of high speed moving objects; due to the scanning mode of the line scan camera, it can provide very high image resolution. The camera can capture a large amount of pixel data in a continuous scanning process, so that high-precision image details are obtained; the line scan camera is suitable for photographing long strip or continuously moving objects. The camera can continuously scan in the direction of the movement of the object, so that the image of the whole object can be captured without regional scanning of the whole object; due to the scanning mode of the line scanning camera, the image distortion caused by the movement of an object can be reduced. The camera continuously scans in the moving direction of the object, so that the condition that the object is blurred or stretched in the image can be avoided; line scan cameras generally have a high sensitivity and dynamic range, and thus can capture high quality images in low light conditions. This makes line scan cameras very useful in some special application scenarios, such as industrial inspection and machine vision.
It should be noted that line scan cameras also have some limitations, such as image acquisition for stationary objects that are less effective than area scan cameras. Therefore, the camera is required to be evaluated and selected according to the specific application requirement, and in the implementation of the scheme, the corresponding data can be acquired not only in the form of a mobile wire sweep camera or a mobile workpiece.
As a further optimization of the invention, the method comprises at least one group of XY stage movement control devices, and the XY stage movement control devices drive the cutter or the glass workpiece to move in cutting path coordinates.
As a further optimization scheme of the invention, the cutter is a laser cutter.
As a further optimization scheme of the invention, the cutter is an ultraviolet skin second laser.
As a further optimization scheme of the invention, based on the four edge line image data of the glass workpiece, the four edges of the glass workpiece are outwards expanded by 30um to obtain the cutting path coordinates.
As a further optimization scheme of the invention, a connecting line from the cutting end of the cutter to the plane of the glass workpiece is set as a cutting line, the cutting line corresponding to the long side of the glass workpiece is perpendicular to the plane of the glass workpiece, and a corresponding included angle exists between the cutting line corresponding to the short side of the glass workpiece and the plane of the glass workpiece.
As a further optimization scheme of the invention, the first wind pressure which is uniformly distributed is arranged above the uppermost PET protective film.
As a further optimization scheme of the invention, a second wind pressure is arranged between the OCA optical cement and the lowest PET protective film.
The invention has the beneficial effects that: according to the invention, corresponding cutting drawings can be obtained for each product independently, and the cutting paths of different products can be dynamically adjusted, so that the precision of the cut products is improved; the invention can provide higher precision when cutting PET films and OCA optical adhesive films on the upper and lower surfaces of glass, and control the cutting heat influence within 30 um.
Drawings
FIG. 1 is a schematic structural view of the product of the present invention;
FIG. 2 is a schematic illustration of the heat influencing effect of the present invention;
FIG. 3 is a schematic view of edge accuracy after cutting of a long side portion of a glass workpiece according to the present invention;
FIG. 4 is a schematic view of the intermediate precision of the cut long side portion of the glass workpiece of the present invention;
FIG. 5 is a schematic view of edge accuracy after cutting of a short side portion of a glass workpiece of the present invention;
FIG. 6 is a schematic view of intermediate precision after cutting of a short side portion of a glass workpiece of the present invention;
FIG. 7 is a method flow diagram of a method for laser film cutting with automatic trajectory planning during edge inspection according to the present invention;
fig. 8 is a position structure diagram of two sets of wind pressure structures according to the present invention.
Detailed Description
The following detailed description of the present application is provided in conjunction with the accompanying drawings, and it is to be understood that the following detailed description is merely illustrative of the application and is not to be construed as limiting the scope of the application, since numerous insubstantial modifications and adaptations of the application will be to those skilled in the art in light of the foregoing disclosure.
Referring to the product structure shown in fig. 1 and the method steps shown in fig. 7, the embodiment discloses a method for cutting a laser film material for automatically planning a track during edge inspection, which comprises the following steps,
step S102, obtaining a glass workpiece with a film to be cut, wherein the glass workpiece with the film to be cut is formed by sequentially stacking and applying OCA optical cement and PET protective films on the upper surface of the glass workpiece from low to high, and pressing the PET protective films on the lower surface of the glass workpiece;
step S104, obtaining image data of a glass workpiece with a film to be cut, and obtaining position coordinate data of the glass workpiece based on the image data of the glass workpiece with the film to be cut;
step S106, obtaining film cutting path coordinates based on the position coordinate data of the glass workpiece;
and S108, driving a cutter or the glass workpiece to move based on the coordinates of the film cutting path, wherein the cutter cuts the film on the surface of the glass workpiece in the cutting path.
Further, based on the positions of the glass workpieces, image data of four sides of the glass workpieces are obtained, based on the image data of the four sides, edge data of the glass workpieces are obtained through fitting, and peripheral edge line data of the glass workpieces are obtained based on the edge data of the glass workpieces.
Specifically, image data of four edges of the glass workpiece are collected based on a line scanning camera.
In general, the corresponding calculation is performed by a visual processing algorithm, and in this embodiment, a line scanning camera is used to improve the corresponding accuracy.
The method comprises at least one group of XY stage movement control device, wherein the XY stage movement control device drives the cutter or the glass workpiece to move in a cutting path coordinate mode.
The XY platform movement control device can select a cross sliding table structure component, and can also adopt other forms of two-direction control components.
Specifically, the cutter is a laser cutter.
In this embodiment, referring to fig. 2, the cutter is a uv second laser, and when using a uv second laser, the thermal effect is only within 25um under the same cutting conditions as compared to other types of laser cutters.
Specifically, when the laser cutter of other forms is used for comparing with the ultraviolet skin second laser, the glass workpiece with the same thickness and the film with the same thickness are cut, and only the ultraviolet skin second laser can control the influence error within 25 um.
Generally, the cutting path coordinates are obtained by expanding the periphery of the glass workpiece by 30um based on the four edge line image data of the glass workpiece.
It should be noted that, referring to fig. 3, fig. 4, fig. 5 and fig. 6, a line from a cutting end of the cutter to a plane where the glass workpiece is located is set as a cutting line, the cutting line corresponding to a long side of the glass workpiece is perpendicular to the plane of the glass workpiece, and a corresponding included angle exists between the cutting line corresponding to a short side of the glass workpiece and the plane of the glass workpiece.
As shown in the figure, the precision of the long side is about 30+/-10 um, the cutting position of the short side is 11-23 um away from the edge of the glass, and a certain angle is preset on the cutting line, and can be adjusted based on the thickness of the film and the glass.
Further, as shown in fig. 8, a first wind pressure is uniformly distributed above the uppermost PET protection film.
Still further, be provided with the second wind pressure between OCA optical cement and the PET protection film of below.
In fig. 8, the left graph is actually a schematic position of the first wind pressure and the second wind pressure, in general, a thin pipe may be adopted to match with an air outlet on the surface of the thin pipe to perform air outlet, and a corresponding air jet head may be additionally arranged on the surface of the thin pipe, but it should be noted that a diffusion type air jet mode needs to be adopted, that is, the air outflow is in a conical structure, referring to the left graph in fig. 8, at least two groups of air outlet ends are arranged, one group of air pressures is provided at the upper side, one group of air pressures is provided at the lower side, so that stronger stability can be provided for cutting of the glass film, the cutting edge is smoother, two groups of air pressure areas overlap at the cutting position, and here, the right graph in fig. 8 can be referred to.
When the method for cutting the laser film material for automatically planning the track on the inspection edge is used, the whole glass contour is scanned firstly, four edges are scanned and photographed respectively by a line scanning camera, then the glass edges are fitted through a vision processing algorithm to form the peripheral edge line of the whole glass, the fitted glass edges are respectively expanded by 30 mu m to be the required cutting drawing, and thus, each piece of different products can generate a cutting path according to the actual size of each piece of product.
According to the heat influence requirement, the ultraviolet skin second laser is adopted, so that the heat influence can be effectively reduced. The drawing generated in the cutting process is a planned cutting path, and the software controls the shaft to move through a driver to form an actual cutting track. The laser processing adopts a fixed light path and an XY platform combined motion mode, and after four-side cutting is completed, the residual materials fall off.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (10)
1. A method for cutting a laser film material for automatically planning a track during edge inspection is characterized by comprising the following steps,
obtaining a glass workpiece with a film to be cut, wherein the glass workpiece with the film to be cut is formed by sequentially stacking and applying OCA optical cement and PET protective films on the upper surface of the glass workpiece from low to high, and pressing the PET protective films on the lower surface of the glass workpiece;
obtaining image data of a glass workpiece of a film to be cut, and obtaining position coordinate data of the glass workpiece based on the image data of the glass workpiece of the film to be cut;
obtaining film cutting path coordinates based on the position coordinate data of the glass workpiece;
and driving a cutter or the glass workpiece to move based on the coordinates of the film cutting path, wherein the cutter cuts the film on the surface of the glass workpiece in the cutting path.
2. The method for cutting the laser film material for automatically planning tracks during edge inspection according to claim 1, wherein the method comprises the following steps: based on the positions of the glass workpieces, image data of four sides of the glass workpieces are obtained, edge data of the glass workpieces are obtained through fitting based on the image data of the four sides, and peripheral edge line data of the glass workpieces are obtained based on the edge data of the glass workpieces.
3. The method for cutting the laser film material for automatically planning tracks during edge inspection according to claim 2, wherein the method comprises the following steps: and acquiring image data of four edges of the glass workpiece based on a line scanning camera.
4. A method for cutting a laser film material for automatically planning a track during edge inspection according to claim 3, wherein the method comprises the following steps: the method includes at least one set of XY stage movement control devices that drive the cutter or glass workpiece to move in cutting path coordinates.
5. The method for cutting the laser film material for automatically planning tracks during edge inspection according to claim 4, wherein the method comprises the following steps: the cutter is a laser cutter.
6. The method for cutting the laser film material for automatically planning tracks during edge inspection according to claim 5, wherein the method comprises the following steps: the cutter is a purple skin second laser.
7. A method for cutting a laser film material for automatically planning a track on an inspection edge according to claim 6, wherein the method comprises the following steps: and expanding the periphery of the glass workpiece by 30um based on the four edge line image data of the glass workpiece to obtain the cutting path coordinates.
8. The method for cutting the laser film material for automatically planning tracks during edge inspection according to claim 1, wherein the method comprises the following steps: the connecting line from the cutting end of the cutter to the plane of the glass workpiece is set as a cutting line, the cutting line corresponding to the long side of the glass workpiece is perpendicular to the plane of the glass workpiece, and a corresponding included angle exists between the cutting line corresponding to the short side of the glass workpiece and the plane of the glass workpiece.
9. The method for cutting the laser film material for automatically planning tracks during edge inspection according to claim 1, wherein the method comprises the following steps: the upper part of the uppermost PET protection film is provided with uniformly distributed first wind pressure.
10. The method for cutting the laser film material for automatically planning tracks during edge inspection according to claim 1 or 9, wherein the method comprises the following steps of: and a second air pressure is arranged between the OCA optical cement and the PET protective film at the lowest part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311438455.7A CN117283160A (en) | 2023-11-01 | 2023-11-01 | Method for cutting laser film material with automatic track planning during edge inspection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311438455.7A CN117283160A (en) | 2023-11-01 | 2023-11-01 | Method for cutting laser film material with automatic track planning during edge inspection |
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| CN117283160A true CN117283160A (en) | 2023-12-26 |
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| CN202311438455.7A Pending CN117283160A (en) | 2023-11-01 | 2023-11-01 | Method for cutting laser film material with automatic track planning during edge inspection |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106079196A (en) * | 2016-06-23 | 2016-11-09 | 凌云光技术集团有限责任公司 | A kind of generation method and device of burr cutting path |
| CN112935579A (en) * | 2021-01-29 | 2021-06-11 | 大族激光科技产业集团股份有限公司 | Laser film cutting equipment |
| CN216858640U (en) * | 2022-02-25 | 2022-07-01 | 东莞市达瑞电子股份有限公司 | Curved surface eye-shade cutting equipment |
| CN115159828A (en) * | 2022-06-13 | 2022-10-11 | 武汉华工激光工程有限责任公司 | Laser cutting method and system for ground glass |
| CN116393842A (en) * | 2023-05-26 | 2023-07-07 | 深圳铭创智能装备有限公司 | Curved glass edge film cutting device and application method thereof |
-
2023
- 2023-11-01 CN CN202311438455.7A patent/CN117283160A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106079196A (en) * | 2016-06-23 | 2016-11-09 | 凌云光技术集团有限责任公司 | A kind of generation method and device of burr cutting path |
| CN112935579A (en) * | 2021-01-29 | 2021-06-11 | 大族激光科技产业集团股份有限公司 | Laser film cutting equipment |
| CN216858640U (en) * | 2022-02-25 | 2022-07-01 | 东莞市达瑞电子股份有限公司 | Curved surface eye-shade cutting equipment |
| CN115159828A (en) * | 2022-06-13 | 2022-10-11 | 武汉华工激光工程有限责任公司 | Laser cutting method and system for ground glass |
| CN116393842A (en) * | 2023-05-26 | 2023-07-07 | 深圳铭创智能装备有限公司 | Curved glass edge film cutting device and application method thereof |
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