CN114985956A - Laser cutting device and method for display screen - Google Patents
Laser cutting device and method for display screen Download PDFInfo
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- CN114985956A CN114985956A CN202110194201.XA CN202110194201A CN114985956A CN 114985956 A CN114985956 A CN 114985956A CN 202110194201 A CN202110194201 A CN 202110194201A CN 114985956 A CN114985956 A CN 114985956A
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- 238000003698 laser cutting Methods 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 claims abstract description 180
- 238000005520 cutting process Methods 0.000 claims abstract description 174
- 230000007547 defect Effects 0.000 claims abstract description 174
- 238000004891 communication Methods 0.000 claims description 24
- 230000001960 triggered effect Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000007689 inspection Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
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- 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
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- 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
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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Abstract
The application discloses laser cutting device and method of display screen, belong to laser cutting technical field, this laser cutting device of display screen includes the workstation, the sample anchor clamps, the laser instrument, the laser cutting head, the location camera, defect detection camera and motion control board, when carrying out the screen cutting, fix the screen sample through the sample anchor clamps earlier, rethread location camera discerns the benchmark and the cutting position of screen sample, control the laser instrument through the motion control board and start, the laser that the laser instrument sent carries out the light path regulation through the laser cutting head, make the laser that the laser instrument sent can accurately fall on the cutting position, realize the laser cutting of screen sample, and form the cutting passageway of laser cutting, control defect detection camera through the motion control board and carry out defect detection to the cutting passageway, output defect detection result. The laser cutting device of the display screen is simple in structure and convenient to manage and maintain.
Description
Technical Field
The application belongs to the technical field of laser cutting, and particularly relates to a laser cutting device and method for a display screen.
Background
With the development of society, various electronic devices are filled in daily life, and many electronic devices cannot be separated from a display screen, for example, electronic products such as mobile phones, televisions, computers and the like need to use the display screen for displaying, and a screen cutting process is an indispensable process in the production process of various display screens at present. At present, the screen cutting process is mostly realized based on laser cutting, a high-power-density laser beam is utilized to irradiate a cut screen material, so that the screen material is heated to a vaporization temperature quickly and is evaporated to form holes, and the holes continuously form slits with narrow width (such as about 0.1 mm) along with the movement of the light beam on the screen material, so that the screen material is cut. In the process of cutting the screen by the laser, the movement of the laser direction needs to be controlled by a corresponding electrical control system, the electrical control of the traditional laser cutting system adopts a vibrating mirror, a vibrating mirror control card and a motion control card to jointly control the laser motion direction, but the scheme needs to be additionally provided with a plurality of groups of vibrating mirrors and a corresponding vibrating mirror control card, so that the cost is consumed, components of the laser cutting equipment become complex and the equipment management is not facilitated.
Disclosure of Invention
The embodiment of the application provides a laser cutting device and method of a display screen, and aims to solve the technical problems that an electrical control system of existing laser cutting equipment is complex in structure, not beneficial to equipment management and high in manufacturing cost.
In order to solve the above technical problem, an embodiment of the present application provides a laser cutting device for a display screen, which adopts the following technical scheme:
the utility model provides a display screen's laser cutting device, includes workstation, sample anchor clamps and laser instrument, the sample anchor clamps with the laser instrument all sets up on the workstation, the sample anchor clamps are used for the fixed screen sample that waits to cut, the laser instrument is used for cutting the screen sample to form the cutting passageway, still include laser cutting head, location camera, defect detection camera and motion control card, the laser instrument, location camera and defect detection camera all with motion control card communication connection, the laser cutting head set up in light-emitting direction one side of laser instrument, wherein:
the laser cutting head is used for changing the angle of the laser emitted by the laser;
the positioning camera is used for determining a reference point and a cutting position of the screen sample;
the defect detection camera is used for detecting the defects of the cutting channel and outputting a defect detection result;
and the motion control card is used for controlling the laser and the defect detection camera.
Furthermore, the positioning camera is preset with reference information of the screen sample, and the positioning camera determines a reference point of the screen sample based on the reference information.
Furthermore, the positioning camera is preset with cutting information of the screen sample, and the positioning camera determines the cutting position of the screen sample based on the reference point and the cutting information.
Further, the motion control card comprises a first differential channel and a second differential channel, the motion control card is in communication connection with the laser through the first differential channel, and the motion control card is in communication connection with the defect detection camera through the second differential channel.
Further, the defect detection camera comprises a transverse defect detection camera and a longitudinal defect detection camera, and the transverse defect detection camera and the longitudinal defect detection camera are both in communication connection with the motion control card through the second differential channel.
In order to solve the above technical problem, an embodiment of the present application further provides a laser cutting method for a display screen, which adopts the following technical solutions:
a laser cutting method of a display screen is applied to the laser cutting device of the display screen, and comprises the following steps:
fixing a screen sample on the sample clamp, and adjusting the flatness of the screen sample;
calling the positioning camera and determining a reference point of the screen sample based on preset reference information;
calling the positioning camera and determining the cutting position of the screen sample based on the reference point and preset cutting information;
controlling the laser to perform laser cutting on the screen sample based on the cutting position through the motion control card to form a cutting channel;
and controlling the defect detection camera to carry out defect detection on the cutting channel through the motion control card, and outputting a defect detection result.
Further, the step of calling the positioning camera and determining the reference point of the screen sample based on preset reference information specifically includes:
calling the positioning camera to shoot the screen sample to obtain a picture of the screen sample;
constructing a reference coordinate system on the picture of the screen sample;
and acquiring reference information of the screen sample, and determining a reference point of the screen sample based on the constructed reference coordinate system and the reference information.
Further, the motion control card comprises a first differential channel and a second differential channel, the motion control card is in communication connection with the laser through the first differential channel, and the motion control card is in communication connection with the defect detection camera through the second differential channel.
Further, the defect detection camera includes a transverse defect detection camera and a longitudinal defect detection camera, the step of controlling the defect detection camera to detect the defect of the cutting channel through the motion control card and outputting the defect detection result specifically includes:
controlling a transverse defect detection camera to carry out transverse detection on the cutting channel through the motion control card to obtain a transverse defect detection result;
controlling a longitudinal defect detection camera to perform longitudinal detection on the cutting channel through the motion control card to obtain a longitudinal defect detection result;
and generating a defect detection result of the cutting channel based on the transverse defect detection result and the longitudinal defect detection result.
Further, the step of performing transverse detection on the cutting channel specifically includes:
transversely detecting the cutting width and the cutting position degree of each cutting channel and whether the screen inner terminal which is not completely cut off exists in the cutting channel;
the step of longitudinally detecting the cutting channel specifically comprises:
and longitudinally detecting the cutting width and the cutting position degree of each cutting channel and whether the screen inner terminal which is not completely cut off exists in the cutting channel.
Compared with the prior art, the embodiment of the application mainly has the following beneficial effects:
the application discloses a laser cutting device and a method of a display screen, belonging to the technical field of laser cutting, wherein the laser cutting device of the display screen comprises a workbench, a sample clamp and a laser, the sample clamp and the laser are arranged on the workbench, the sample clamp is used for fixing a screen sample to be cut, the laser is used for cutting the screen sample and forming a cutting channel, the laser cutting device of the display screen also comprises a laser cutting head, a positioning camera, a defect detection camera and a motion control card, the laser, the positioning camera and the defect detection camera are all in communication connection with the motion control card, the laser cutting head is arranged at one side of the light-emitting direction of the laser, wherein the laser cutting head is used for changing the angle of laser emitted by the laser, the positioning camera is used for determining the reference point and the cutting position of the screen sample, and the defect detection camera is used for detecting defects of the cutting channel, and outputting a defect detection result, wherein the motion control card is used for controlling the laser and the defect detection camera. When the screen cutting is carried out, the screen sample is fixed through the sample clamp firstly, the datum point and the cutting position of the screen sample are identified through the positioning camera, the laser is controlled to be started through the motion control card, laser emitted by the laser carries out light path adjustment through the laser cutting head, laser emitted by the laser can accurately fall on the cutting position, the laser cutting of the screen sample is achieved, a cutting channel for laser cutting is formed, the defect detection camera is controlled through the motion control card to carry out defect detection on the cutting channel, and a defect detection result is output. This application controls the light-emitting angle of laser through setting up the laser cutting head, realizes laser instrument control and defect detection camera control through setting up a motion control card, whole device simple structure, convenient management and maintenance.
Drawings
In order to illustrate the present application or prior art more clearly, a brief description of the drawings needed for the description of the embodiments or prior art will be given below, it being clear that the drawings in the following description are some embodiments of the present application and that other drawings can be derived from them by a person skilled in the art without inventive effort.
Fig. 1 shows a flowchart of an embodiment of a laser cutting method of a display screen according to an embodiment of the present application.
Detailed Description
Unless defined otherwise, 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 terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In order to solve the technical problem, the application discloses a laser cutting device of display screen, including workstation, sample anchor clamps and laser instrument, the sample anchor clamps with the laser instrument all set up in on the workstation, the sample anchor clamps are used for the fixed screen sample that waits to cut, the laser instrument is used for right the screen sample cuts to form the cutting passageway, still include laser cutting head, location camera, defect detection camera and motion control card, the laser instrument location camera with defect detection camera all with motion control card communication connection, the laser cutting head set up in light-emitting direction one side of laser instrument, wherein:
the laser cutting head is used for changing the angle of the laser emitted by the laser;
the positioning camera is used for determining a reference point and a cutting position of the screen sample;
the defect detection camera is used for detecting the defects of the cutting channel and outputting a defect detection result;
and the motion control card is used for controlling the laser and the defect detection camera.
The laser cutting head consists of a nozzle, a focusing system and a focusing tracking system, wherein the nozzle is a part closest to a cut workpiece, and in the laser cutting process, the nozzle can form an air field at a cutting position to blow away slag generated in the cutting process, so that the laser head is prevented from being polluted by foreign matters. The focusing lens is a lens for focusing laser beams, the focusing lens focuses the laser beams into high-density light spots or light velocity, the smaller the light spots are, the higher the density is, the smaller the cutting gap formed on the surface of the workpiece is, and therefore the high-precision and high-speed cutting effect is achieved. The focusing and tracking system can sense the direction of a condensing light beam and a focusing light spot in real time in the laser cutting process and feed back the real-time light beam direction and the quality of the light spot so as to improve the accuracy of laser cutting.
Specifically, before screen cutting, the workbench, the sample clamp and the laser are adjusted to enable the three to reach the level. When carrying out the screen cutting, earlier through the fixed screen sample of sample anchor clamps, rethread location camera discernment screen sample's benchmark and cutting position, start through motion control card control laser instrument, the laser that the laser instrument sent carries out the light path through the laser cutting head and adjusts, make the laser that the laser instrument sent can be accurate on dropping on the cutting position, realize the laser cutting of screen sample, and form the cutting passageway of laser cutting, control the defect detection camera through the motion control card and carry out defect detection to the cutting passageway, output defect detection result. This application comes the light-emitting angle of control laser through the laser cutting head 31 that sets up in advance, realizes laser instrument control and defect detection camera control through setting up a motion control card, and motion control card control laser instrument starts and closes for laser passes through the focus of laser cutting head at the cutting position, whole device simple structure, convenient management and maintenance.
Furthermore, the positioning camera is preset with reference information of the screen sample, and the positioning camera determines a reference point of the screen sample based on the reference information.
Specifically, the reference point refers to a mark point, and the mark point is a position identification point of the PCB applied to the automatic chip mounter in the circuit board design. The selection of mark points directly influences the chip mounting efficiency of the automatic chip mounter. Before the screen is cut, an operator inputs the reference information of the screen sample in a positioning camera in advance according to the cutting requirement document. When the screen is cut, an operator firstly fixes the screen sample through the sample clamp and adjusts the flatness of the screen sample, so that the screen sample is kept horizontal with the workbench, the sample clamp and the laser, then the positioning camera shoots the screen sample, a coordinate system is built on the screen sample, and finally the positioning camera determines the reference point coordinate of the screen sample based on the screen sample picture and the reference information of the screen sample.
Furthermore, the positioning camera is preset with cutting information of the screen sample, and the positioning camera determines the cutting position of the screen sample based on the reference point and the cutting information.
Further, the cutting position of the screen sample comprises a number of cutting points.
Specifically, the positioning camera determines cutting position coordinates of the screen sample based on a picture of the screen sample, cutting information of the screen sample, and reference point coordinates of the screen sample, wherein the cutting position coordinates of the screen sample comprise coordinates of a plurality of cutting points. In a specific embodiment of the application, the positioning camera sends the coordinates of the multiple cutting points of the screen sample to the motion control card, and the motion control card accurately controls the switch of the laser according to the coordinates of the multiple cutting points to cut the screen sample.
Further, the motion control card comprises a first differential channel and a second differential channel, the motion control card is in communication connection with the laser through the first differential channel, and the motion control card is in communication connection with the defect detection camera through the second differential channel. The motion control card further comprises a network connection channel, and the motion control card is connected with the positioning camera through the network connection channel.
The motion control card is an upper control unit based on a computer (PC) and an industrial computer (industrial PC) and used for various motion control occasions (including displacement, speed, acceleration and the like). The motion control card is a high-performance microprocessor for realizing multi-axis coordinated control of elements, and includes pulse output, pulse counting, digital input, digital output, D/A output and other functions, and can send out continuous high-frequency pulse string to control corresponding elements by changing the pulse frequency, for example, the speed of motor is controlled by the motion control card, and the number of pulses sent out by the motion control card is changed to control the speed of motor. The motion control card is widely applied to a position control system which needs accurate positioning and fixed length and an NC control system based on PC in the field of industrial automation control. Specifically, the bottom layer software and hardware for realizing motion control are integrated together, so that the servo motor has various speed and position control functions required by servo motor control, and the functions can be conveniently called by a computer.
Specifically, in the application, the motion control card includes a first differential channel and a second differential channel, the motion control card is in communication connection with the laser through the first differential channel and is used for controlling the laser to be switched on and switched off, and the motion control card is in communication connection with the defect detection camera through the second differential channel and is used for controlling the defect detection camera to complete the defect detection of laser cutting.
Further, the defect detection camera comprises a transverse defect detection camera and a longitudinal defect detection camera, and the transverse defect detection camera and the longitudinal defect detection camera are both in communication connection with the motion control card through the second differential channel.
In the specific embodiment of the present application, the defect detection camera is an AOI camera, and chinese full name of AOI (Automated Optical Inspection abbreviation) is automatic Optical detection, which is an apparatus for detecting common defects encountered in welding production based on an Optical principle. AOI is a new emerging testing technology, but the development is rapid, and AOI testing equipment is released by many manufacturers. During automatic detection, the machine automatically scans the PCB through the camera, acquires images, compares the tested welding spots with qualified parameters in the database, inspects the defects on the PCB through image processing, and displays/marks the defects through a display or an automatic mark for repair personnel to repair. And (3) automatically detecting various different mounting errors and welding defects on the PCB by using a high-speed high-precision vision processing technology. The PCB board can range from a fine pitch high density board to a low density large size board, and can provide an on-line inspection scheme to improve production efficiency, and soldering quality. By using AOI as a defect reduction tool, errors are located and eliminated early in the assembly process to achieve good process control. Early detection of defects will avoid sending a bad board to a subsequent assembly stage, AOI will reduce repair costs and will avoid scrapping an unrepairable circuit board. In a specific embodiment of the present application, the cutting width and the cutting position degree of the cutting channel and whether there is an incompletely cut off in-screen terminal in the cutting channel may be detected by the AOI camera.
Specifically, after laser cutting is completed, an AOI camera is required to detect the cutting width and the cutting position degree of each cutting channel and whether there is an incompletely cut off in-screen terminal in the cutting channel. In a specific embodiment of the present application, two AIO cameras are required to perform lateral detection and longitudinal detection of the cutting channel. The trigger switch for AOI detection is the same as the switch for laser control, and one differential channel of the motion control card is required for trigger control, while the general motion control card only has two differential channels, namely a first differential channel and a second differential channel, wherein the first differential channel is used for controlling the laser, so that two AIO cameras are in communication connection with the motion control card through the second differential channel, after laser cutting is completed, the second differential channel outputs signals triggered by the AOI cameras, the transverse defect detection cameras are triggered firstly through program setting to obtain transverse defect detection results, and then the longitudinal defect detection cameras are triggered to obtain longitudinal defect detection results. In a specific embodiment of the present application, a motion control card is used to control a transverse defect detection camera to perform transverse detection on a cutting channel, and to transversely detect the cutting width and the cutting position of each cutting channel and whether the cutting channel has an incompletely cut in-screen terminal to obtain a transverse defect detection result, and then the motion control card is used to control a longitudinal defect detection camera to perform longitudinal detection on the cutting channel, and to longitudinally detect the cutting width and the cutting position of each cutting channel and whether the cutting channel has an incompletely cut in-screen terminal to obtain a longitudinal defect detection result, and the obtained transverse defect detection result and the obtained longitudinal defect detection result are integrated to generate a defect detection result of the cutting channel.
In a specific embodiment of the application, whether the screen sample is cut successfully is determined according to a transverse defect detection result and a longitudinal defect detection result, if both the transverse defect detection result and the longitudinal defect detection result meet requirements, the screen sample is judged to be cut successfully, namely, the screen sample is cut OK, if one or both of the transverse defect detection result and the longitudinal defect detection result do not meet the requirements, the screen sample is judged to be cut failed, namely, the screen sample is cut NG, pictures of the cut NG screen sample are collected, and the later-stage inspection by an operator is facilitated.
The application discloses a laser cutting device of a display screen, which belongs to the technical field of laser cutting, and comprises a workbench, a sample clamp and a laser, wherein the sample clamp and the laser are arranged on the workbench, the sample clamp is used for fixing a screen sample to be cut, the laser is used for cutting the screen sample and forming a cutting channel, the laser cutting device of the display screen also comprises a laser cutting head, a positioning camera, a defect detection camera and a motion control card, the laser, the positioning camera and the defect detection camera are all in communication connection with the motion control card, the laser cutting head is arranged on one side of the light emitting direction of the laser, the laser cutting head is used for changing the angle of laser emitted by the laser, the positioning camera is used for determining the reference point and the cutting position of the screen sample, and the defect detection camera is used for detecting defects of the cutting channel, and outputting a defect detection result, wherein the motion control card is used for controlling the laser and the defect detection camera. When carrying out the screen cutting, earlier through the fixed screen sample of sample anchor clamps, rethread location camera discernment screen sample's benchmark and cutting position, start through motion control card control laser instrument, the laser that the laser instrument sent carries out the light path through the laser cutting head and adjusts, make the laser that the laser instrument sent can be accurate on dropping on the cutting position, realize the laser cutting of screen sample, and form the cutting passageway of laser cutting, control the defect detection camera through the motion control card and carry out defect detection to the cutting passageway, output defect detection result. This application controls the light-emitting angle of laser through setting up the laser cutting head, realizes laser instrument control and defect detection camera control through setting up a motion control card, whole device simple structure, convenient management and maintenance.
In order to solve the above technical problem, please refer to fig. 1, the present application discloses a laser cutting method for a display screen, which is applied to the laser cutting device for a display screen as described above, and the laser cutting method for a display screen includes:
s1, fixing the screen sample on a sample clamp, and adjusting the flatness of the screen sample;
s2, calling a positioning camera and determining a reference point of the screen sample based on preset reference information;
s3, calling a positioning camera and determining the cutting position of the screen sample based on the reference point and preset cutting information;
s4, controlling a laser to perform laser cutting on the screen sample based on the cutting position through a motion control card to form a cutting channel;
and S5, controlling the defect detection camera to detect the defects of the cutting channel through the motion control card, and outputting a defect detection result.
Further, the cutting position of the screen sample includes several cutting points.
Specifically, when the screen is cut, an operator firstly fixes the screen sample through a sample clamp and adjusts the flatness of the screen sample, so that the screen sample is kept horizontal with the workbench, the sample clamp and the laser, then the positioning camera shoots the screen sample, a picture of the screen sample is obtained, a coordinate system is constructed on the picture of the screen sample, and finally the positioning camera determines the reference point coordinate of the screen sample based on the picture of the screen sample and the reference information of the screen sample. The positioning camera determines cutting position coordinates of the screen sample based on the picture of the screen sample, the cutting information of the screen sample, and the reference point coordinates of the screen sample, wherein the cutting position coordinates of the screen sample include coordinates of a plurality of cutting points. In a specific embodiment of the application, the positioning camera sends the coordinates of the multiple cutting points of the screen sample to the motion control card, and the motion control card accurately controls the laser to be switched on and off according to the coordinates of the multiple cutting points to cut the screen sample.
Further, the motion control card comprises a first differential channel and a second differential channel, the motion control card is in communication connection with the laser through the first differential channel, and the motion control card is in communication connection with the defect detection camera through the second differential channel.
Specifically, in this application, the motion control card includes a first differential channel and a second differential channel, the motion control card is in communication connection with the laser through the first differential channel for controlling the switching of the laser, and the motion control card is in communication connection with the defect detection camera through the second differential channel for controlling the defect detection camera to complete the defect detection of laser cutting.
Further, the defect detection camera includes a transverse defect detection camera and a longitudinal defect detection camera, the transverse defect detection camera and the longitudinal defect detection camera are both in communication connection with the motion control card through the second differential channel, and the step of controlling the defect detection camera to perform defect detection on the cutting channel through the motion control card and outputting a defect detection result specifically includes:
controlling a transverse defect detection camera to carry out transverse detection on the cutting channel through the motion control card to obtain a transverse defect detection result;
controlling a longitudinal defect detection camera to perform longitudinal detection on the cutting channel through the motion control card to obtain a longitudinal defect detection result;
and generating a defect detection result of the cutting channel based on the transverse defect detection result and the longitudinal defect detection result.
Further, the step of performing transverse detection on the cutting channel specifically includes:
transversely detecting the cutting width and the cutting position degree of each cutting channel and whether the screen inner terminal which is not completely cut off exists in the cutting channel;
the step of longitudinally detecting the cutting channel specifically comprises:
and longitudinally detecting the cutting width and the cutting position degree of each cutting channel and whether the screen inner terminal which is not completely cut off exists in the cutting channel.
Specifically, after the laser cutting is completed, it is necessary to detect the cutting width, the cutting position degree, and the presence or absence of an incompletely cut inner terminal in each cutting channel using the AOI camera. In a specific embodiment of the present application, two AIO cameras are required for lateral and longitudinal detection of the cut channel. The trigger switch of AOI detection is the same as the switch of laser control, and one differential channel of the motion control card is needed for trigger control, but the general motion control card only has two differential channels, namely a first differential channel and a second differential channel, wherein the first differential channel is used for controlling the laser, so that two AIO cameras are in communication connection with the motion control card through the second differential channel, after laser cutting is completed, the second differential channel outputs signals triggered by the AOI cameras, transverse defect detection cameras are triggered firstly through program setting to obtain transverse defect detection results, and then longitudinal defect detection cameras are triggered to obtain longitudinal defect detection results. In a specific embodiment of the present application, a motion control card is used to control a transverse defect detection camera to perform transverse detection on a cutting channel, and to transversely detect the cutting width and the cutting position of each cutting channel and whether the cutting channel has an incompletely cut in-screen terminal to obtain a transverse defect detection result, and then the motion control card is used to control a longitudinal defect detection camera to perform longitudinal detection on the cutting channel, and to longitudinally detect the cutting width and the cutting position of each cutting channel and whether the cutting channel has an incompletely cut in-screen terminal to obtain a longitudinal defect detection result, and the obtained transverse defect detection result and the obtained longitudinal defect detection result are integrated to generate a defect detection result of the cutting channel.
In a specific embodiment of the application, whether the screen sample is cut successfully is determined according to a transverse defect detection result and a longitudinal defect detection result, if both the transverse defect detection result and the longitudinal defect detection result meet requirements, the screen sample is judged to be cut successfully, namely, the screen sample is cut OK, if one or both of the transverse defect detection result and the longitudinal defect detection result do not meet the requirements, the screen sample is judged to be cut failed, namely, the screen sample is cut NG, pictures of the cut NG screen sample are collected, and the later-stage inspection by an operator is facilitated.
The application discloses a laser cutting method of a display screen, which belongs to the technical field of laser cutting, and is applied to a laser cutting device of the display screen based on the laser cutting method, the laser cutting device of the display screen comprises a workbench, a sample clamp and a laser, the sample clamp and the laser are both arranged on the workbench, the sample clamp is used for fixing a screen sample to be cut, the laser is used for cutting the screen sample and forming a cutting channel, the laser cutting device of the display screen also comprises a laser cutting head, a positioning camera, a defect detection camera and a motion control card, the laser, the positioning camera and the defect detection camera are all in communication connection with the motion control card, the laser cutting head is arranged on one side of the light emitting direction of the laser, wherein the laser cutting head is used for changing the angle of laser emitted by the laser, and the positioning camera is used for determining the reference point and the cutting position of the screen sample, the defect detection camera is used for detecting defects of the cutting channel and outputting a defect detection result, and the motion control card is used for controlling the laser and the defect detection camera. When carrying out the screen cutting, earlier through the fixed screen sample of sample anchor clamps, rethread location camera discernment screen sample's benchmark and cutting position, start through motion control card control laser instrument, the laser that the laser instrument sent carries out the light path through the laser cutting head and adjusts, make the laser that the laser instrument sent can be accurate on dropping on the cutting position, realize the laser cutting of screen sample, and form the cutting passageway of laser cutting, control the defect detection camera through the motion control card and carry out defect detection to the cutting passageway, output defect detection result. This application controls the light-emitting angle of laser through setting up the laser cutting head, realizes laser instrument control and defect detection camera control through setting up a motion control card, whole device simple structure, convenient management and maintenance.
It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.
Claims (10)
1. The utility model provides a display screen's laser cutting device, includes workstation, sample anchor clamps and laser instrument, the sample anchor clamps with the laser instrument all sets up on the workstation, the sample anchor clamps are used for the fixed screen sample that waits to cut, the laser instrument is used for right the screen sample cuts to form the cutting passageway, its characterized in that still includes laser cutting head, location camera, defect detection camera and motion control card, the laser instrument, location camera and defect detection camera all with motion control card communication connection, the laser cutting head set up in light-emitting direction one side of laser instrument, wherein:
the laser cutting head is used for changing the angle of the laser emitted by the laser;
the positioning camera is used for determining a reference point and a cutting position of the screen sample;
the defect detection camera is used for detecting the defects of the cutting channel and outputting a defect detection result;
and the motion control card is used for controlling the laser and the defect detection camera.
2. The laser cutting apparatus for a display screen according to claim 1, wherein reference information of the screen sample is preset in the positioning camera, and the positioning camera determines the reference point of the screen sample based on the reference information.
3. The laser cutting apparatus for a display screen according to claim 2, wherein cutting information of the screen sample is preset in the positioning camera, and the positioning camera determines a cutting position of the screen sample based on the reference point and the cutting information.
4. The laser cutting device for display screens of any one of claims 1 to 3, wherein the motion control card comprises a first differential channel and a second differential channel, the motion control card being communicatively connected to the laser via the first differential channel, the motion control card being communicatively connected to the defect detection camera via the second differential channel.
5. The laser cutting device for display screens of claim 4, wherein the defect detection cameras comprise a lateral defect detection camera and a longitudinal defect detection camera, and the lateral defect detection camera and the longitudinal defect detection camera are both in communication connection with the motion control card through the second differential channel.
6. A laser cutting method of a display screen, wherein the screen cutting method based on laser cutting is applied to the laser cutting device of the display screen according to any one of claims 1 to 5, and the laser cutting method of the display screen comprises:
fixing a screen sample on the sample clamp, and adjusting the flatness of the screen sample;
calling the positioning camera and determining a reference point of the screen sample based on preset reference information;
calling the positioning camera and determining the cutting position of the screen sample based on the reference point and preset cutting information;
controlling the laser to perform laser cutting on the screen sample based on the cutting position through the motion control card to form a cutting channel;
and controlling the defect detection camera to carry out defect detection on the cutting channel through the motion control card, and outputting a defect detection result.
7. The method for laser cutting of a display screen according to claim 6, wherein the step of invoking the positioning camera and determining the reference point of the screen sample based on preset reference information specifically comprises:
calling the positioning camera to shoot the screen sample to obtain a picture of the screen sample;
constructing a reference coordinate system on the picture of the screen sample;
and acquiring reference information of the screen sample, and determining a reference point of the screen sample based on the constructed reference coordinate system and the reference information.
8. The laser cutting method of the display screen according to claim 6 or 7, wherein the motion control card includes a first differential channel and a second differential channel, the motion control card is communicatively connected with the laser through the first differential channel, and the motion control card is communicatively connected with the defect detection camera through the second differential channel.
9. The laser cutting method for the display screen according to claim 8, wherein the defect detection camera includes a transverse defect detection camera and a longitudinal defect detection camera, and the step of controlling the defect detection camera to perform defect detection on the cutting channel through the motion control card and outputting a defect detection result specifically includes:
controlling a transverse defect detection camera to carry out transverse detection on the cutting channel through the motion control card to obtain a transverse defect detection result;
controlling a longitudinal defect detection camera to perform longitudinal detection on the cutting channel through the motion control card to obtain a longitudinal defect detection result;
and generating a defect detection result of the cutting channel based on the transverse defect detection result and the longitudinal defect detection result.
10. The laser cutting method for a display screen according to claim 9, wherein the step of detecting the cutting path in the transverse direction specifically includes:
transversely detecting the cutting width and the cutting position degree of each cutting channel and whether the screen inner terminal which is not completely cut off exists in the cutting channel;
the step of longitudinally detecting the cutting channel specifically comprises:
and longitudinally detecting the cutting width and the cutting position degree of each cutting channel and whether the screen inner terminal which is not completely cut off exists in the cutting channel.
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