CN113441848A - Cutting method and cutting device for polaroid - Google Patents
Cutting method and cutting device for polaroid Download PDFInfo
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- CN113441848A CN113441848A CN202110727294.8A CN202110727294A CN113441848A CN 113441848 A CN113441848 A CN 113441848A CN 202110727294 A CN202110727294 A CN 202110727294A CN 113441848 A CN113441848 A CN 113441848A
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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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Abstract
The invention discloses a method and a device for cutting a polarizer, and relates to the technical field of laser processing. The laser cutting parameters of the sections are respectively set by dividing the whole cutting path of the edge of the polaroid into the sections, so that the laser light-emitting frequency of the sections is not influenced, the problems of poor local cutting and poor effect consistency of the cutting edge in the polaroid cutting process are solved, and the advantages of high product yield and simple, convenient and time-saving debugging process parameter process are achieved.
Description
Technical Field
The invention relates to the technical field of laser processing, in particular to a method and a device for cutting a polarizer.
Background
Polarizer materials for liquid crystal displays typically have relatively large dimensions, such as 1000mm X500 mm. Manufacturers need to cut large sheets of polarizer stock to obtain smaller usable polarizers.
The current polarizer cutting equipment usually adopts laser cutting, and the laser beam performs cutting operation according to the shape of the cutting track of the edge of the polarizer, and the control mode is usually that the frequency or duty ratio (laser power) of the laser is integrally controlled on the cutting track. The laser cutting control mode has the disadvantages that the cutting effect is poor, the consistency of the cutting edge effect is poor, one edge is poor in cutting or one edge is poor in local cutting, when parameters such as laser frequency on the whole cutting track are adjusted, the problem that other parts are poor in local cutting is easily caused, the debugging difficulty is high, and the consumed time is long.
Therefore, designing a new laser cutting control mode is of great significance for avoiding the problem of poor local cutting.
Disclosure of Invention
In order to solve the defects of the prior art, the present invention provides a method and a device for cutting a polarizer, so as to solve the problems of poor local cutting and poor consistency of the edge cutting effect during the cutting process of the polarizer.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method for cutting a polarizer, which adopts laser cutting to process the polarizer so as to form a cutting path at the peripheral edge of the polarizer, comprises the following steps:
dividing the cutting path into a plurality of fillet cutting sections and a plurality of straight line cutting sections; the fillet cutting section is positioned at each corner of the periphery of the polaroid, and the linear cutting section is positioned at each edge of the periphery of the polaroid;
setting cutting parameters of each fillet cutting segment and each straight line cutting segment respectively and independently;
and carrying out laser cutting on the polaroid according to the cutting parameters.
Optionally, the cutting parameters include one or more of laser frequency, cutting speed and laser pulse energy, and the method has the advantages of few debugging parameters and simple process.
Optionally, the laser frequency includes a fundamental frequency, an actual frequency, a frequency percentage of the cutting laser; the basic frequency is a set frequency of a laser, the actual frequency is a frequency of laser actually emitted by the laser, and the frequency percentage is a ratio of the actual frequency to the basic frequency;
the laser pulse energy is a single pulse energy of the laser. The method has the advantages of few debugging parameter types and simple process.
Optionally, a frequency percentage-velocity profile is calculated from the frequency percentage and the cutting velocity. The actual frequency of the laser can be conveniently controlled by setting a frequency percentage-speed curve graph.
Optionally, the cutting path between two adjacent fillet cutting sections is divided into at least two straight line cutting sections, so that laser cutting parameters of the cutting path at a section close to the fillet cutting section and a section far away from the fillet cutting section can be respectively and independently set, and the consistency of cutting effects at different positions of the same section is good.
Optionally, the cutting process of any one of the circular bead cutting segments or any one of the linear cutting segments at least includes a variable acceleration process, a constant speed process and a variable deceleration process, and the consistency of the cutting effect at different positions is improved by controlling the cutting speed of each cutting segment.
The invention also provides a laser cutting device for the polaroid, which comprises an industrial personal computer, a laser control system, a motion control system and a laser system, wherein the industrial personal computer, the laser control system, the motion control system and the laser system are electrically connected;
the motion control system is used for feeding back the cutting speed information of the laser system to the industrial personal computer in real time;
the industrial personal computer calculates laser frequency data required during cutting according to preset cutting parameters and the cutting speed, and sends the laser frequency data to the laser control system;
the laser control system is used for receiving control information of the industrial personal computer and sending a control instruction to the laser system;
the laser system is used for emitting laser to cut according to the control instruction;
the industrial personal computer is preset with the cutting method.
Optionally, the motion control system includes a motion control card, and the motion control card is configured to monitor and control the cutting speed of the laser system;
the laser control system comprises a laser control card, the laser control card sends out a corresponding control instruction according to received laser frequency data provided by the industrial personal computer, and the control instruction comprises the frequency and pulse energy of laser. Has the advantages of simple structure and convenient control.
Optionally, a frequency percentage-speed curve graph is preset in the industrial personal computer, and the frequency percentage-speed curve graph is manufactured according to the ratio of the frequency percentage of the laser emitted by the laser system to the cutting speed. By presetting a frequency percentage-speed curve diagram, the control of laser cutting can be realized only by controlling the basic frequency, the cutting speed and the pulse energy of the laser, and the method has the advantages of simple, convenient and time-saving process parameter debugging process.
Optionally, the laser system employs CO2The laser has the advantages of wide application and good cutting effect.
The invention provides a method and a device for cutting polaroids, which are suitable for cutting the polaroids of liquid crystal panels with different sizes, and comprise three-edge cutting, four-edge cutting and multi-edge cutting; the laser cutting parameters of the sections are respectively set by dividing the whole cutting path of the edge of the polaroid into the sections, so that the laser light-emitting frequency of the sections is not influenced, the problems of poor local cutting and poor effect consistency of the cutting edge in the polaroid cutting process are solved, and the advantages of high product yield and simple, convenient and time-saving debugging process parameter process are achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for cutting a polarizer according to the present invention;
FIG. 2 is a sectional view showing a cutting path of a polarizer using a method of cutting a polarizer according to the present invention;
fig. 3 is a schematic diagram of a cutting device for a polarizer according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The inventor of the present invention found in long-term research that, when the polarizer is cut by laser in the prior art, the laser control mode is generally to control the laser cutting parameters on the cutting track in the laser cutting process. The laser cutting parameters which are the same are adopted at different positions of the cutting track of the polaroid to cut, so that when local cutting is poor, the cutting effect is improved by adjusting the laser parameters of the whole cutting path, and the local poor at other places is easy to occur by whole adjustment, so that the cutting effect of the whole path can be influenced by changing one cutting parameter, the debugging process is complicated and inconvenient, and the effect consistency of all edges of the cut is poor. Based on this, the inventors propose a solution of the present invention to avoid this problem.
As shown in fig. 1, the cutting method of a polarizer provided by the present invention employs laser cutting to process the polarizer to form a cutting path at the peripheral edge of the polarizer, and the cutting method includes the following steps:
dividing a cutting path into a plurality of fillet cutting sections and a plurality of linear cutting sections; the fillet cutting section is positioned at each corner of the periphery of the polaroid, and the linear cutting section is positioned at each edge of the periphery of the polaroid;
setting cutting parameters of each round-angle cutting segment and each straight-line cutting segment respectively and independently;
and carrying out laser cutting on the polaroid according to the cutting parameters.
Specifically, the polarizer is first placed on a cutting platform, and a cutting path of the polarizer is planned, where the cutting path is usually located at the peripheral edge of the cut polarizer. The cutting path can be any shape, and common cutting paths are trilateral, quadrilateral or polygon. The cutting path is divided into a plurality of fillet cutting sections and a plurality of straight line cutting sections. The fillet cutting section is positioned at each corner of the periphery of the polarizer, and is usually an arc section, such as an arc of one fourth of an R corner; the linear cut segment is located at each side of the perimeter of the polarizer, typically a portion or the entirety of one side of the polarizer. In the specific segmentation, each corner of the polarizer is divided into a round-corner cutting segment, and each edge can be divided into one or more straight-line cutting segments. Optionally, the cutting path between two adjacent fillet cutting sections is divided into at least two straight line cutting sections, and preferably, the cutting path between two adjacent fillet cutting sections is provided as three straight line cutting sections.
For example, as shown in fig. 2, taking the polarizer four-edge cutting as an example, the four-edge cutting is a rectangular cutting path as a whole, wherein the four corners of the rectangle are actually cut into R-corner quarter arcs, and the four-edge cutting is performed according to straight edges and R-corner arcs, and is divided into 16 segments in total, which are identified by NO1-NO 16. The length of the 16 segments is not limited to the fixed circular arcs of NO3, NO7, NO11 and N015, and the lengths of other straight segments can be selected by self according to actual needs.
And respectively and independently setting cutting parameters for each round-angle cutting segment and each straight-line cutting segment. Wherein the cutting parameters may include one or more of laser frequency, cutting speed, and laser pulse energy. The laser frequency includes the fundamental frequency, the actual frequency, the frequency percentage, etc. of the cutting laser. The basic frequency of the cutting laser is the theoretical frequency of the laser set in the laser control system; the actual frequency is the frequency actually emitted by the laser in the actual cutting process. In the actual cutting process, the actual frequency emitted by the laser system is different from the set basic frequency of the laser control system, the actual frequency is related to the speed by taking the basic frequency as a reference, and the frequency percentage is the ratio of the actual frequency to the basic frequency. The laser pulse energy is a single pulse energy of the laser. The laser cutting control in the actual cutting process can be realized by adjusting the cutting parameters. In practical applications, a frequency percentage-speed graph may be calculated according to the frequency percentage and the cutting speed, and the trend of the frequency percentage graph is that the higher the cutting speed, the larger the percentage value is, and the lower the cutting speed, the smaller the percentage value is. And then presetting the data information of the frequency percentage-speed curve graph into a laser control system, and only setting basic frequency, cutting speed and laser pulse energy when carrying out laser cutting, wherein the numerical value of the frequency percentage is distributed by the curve graph, and the cutting speed corresponds to a percentage numerical value in the curve when being a certain numerical value, so that the process of debugging process parameters is simple, convenient and time-saving.
Still taking the example shown in fig. 2, the purpose of dividing into 16 segments is to set the laser frequency parameters for these 16 segments individually. In the actual cutting, the frequency set for each segment may be referred to as a fundamental frequency, and the fundamental frequency for each segment may be different. For example, the base frequency of NO1 segment may be set to 15KHZ, the base frequency of NO2 segment may be set to 16KHZ, the base frequency of NO3 segment may be set to 14KHZ, etc. The single pulse energy of the laser light is controlled by the pulse width, the single pulse energy is increased by increasing the pulse width, and the single pulse energy can be reduced by reducing the pulse width. The pulse width adjustment is mainly to adjust the overall cutting effect, for example, the pulse width can be increased properly if the overall cutting is not completely cut, and the pulse width can be decreased properly if the overall cutting heat influence is too large. The energy of the 16 laser pulses may be set to be the same or different. Preferably, the single pulse energy of all cut edges is uniformly controlled by the pulse width and is not controlled in sections. That is, the energy of the 16 laser pulses is set to be the same, so that the requirement on the laser system is low and the implementation is easy.
When the polarizer is subjected to laser cutting according to the set cutting parameters, the cutting process of each small segment (any one of the fillet cutting segments or any one of the straight line cutting segments) may include one or more of a variable acceleration process, a constant speed process and a variable deceleration process.
According to the method for cutting the polaroid, the integral cutting path is divided into a plurality of small sections, and the cutting parameters are respectively set for each small section, so that the actual laser emergent frequency during cutting of each section can be finely controlled and changed on the basis of the basic frequency set for each section according to the different cutting speeds, the emergent frequency is increased when the cutting speed is increased, the emergent frequency is decreased when the cutting speed is decreased, and the emergent frequency is reduced, so that the consistency of the cutting effect at different positions of the same section is good.
According to the method for cutting the polaroid, provided by the invention, the integral cutting path is divided into a plurality of small sections for cutting, and the cutting parameters are respectively set for each small section, so that the consistency of the cutting effect of each position of the polaroid is good and the problem of poor local part is avoided on the basis of certain difference of internal stress in each position (such as an arc section, a straight line section close to the arc, a straight line section far away from the arc and the like) on the cutting path of the polaroid during cutting. Meanwhile, the frequency conversion control of each segment is mainly convenient for adjusting the condition of poor local cutting effect, and the cutting effect of the corresponding part can be quickly and effectively adjusted. For example, if a local defect occurs, a separate parameter setting can be performed for the part, so that the cutting defects of other parts caused by parameter setting on the whole path are avoided.
As shown in fig. 3, the present invention further provides a laser cutting apparatus for a polarizer, including an industrial personal computer, a laser control system, a motion control system, and a laser system. The industrial personal computer, the laser control system, the motion control system and the laser system are electrically connected. And the motion control system is used for feeding back the cutting speed information of the laser system to the industrial personal computer in real time. The industrial personal computer calculates laser frequency data required during cutting according to preset cutting parameters and cutting speed, and sends the laser frequency data to the laser control system. The laser control system is used for receiving the control information of the industrial personal computer and sending a control instruction to the laser system. The laser system is used for emitting laser according to the control instructionAnd (6) cutting. Laser system using CO2A laser. The industrial personal computer is preset with the cutting method, namely, a frequency percentage-speed curve graph is prestored in the industrial personal computer. The frequency percentage-velocity curve is produced based on the ratio of the frequency percentage of the laser emitted by the laser system to the cutting velocity. When laser cutting is carried out, only basic frequency, cutting speed and laser pulse energy need to be set, the numerical value of the frequency percentage is distributed by a curve graph, and the cutting speed corresponds to a percentage numerical value in the curve when the cutting speed is a certain numerical value, so that the process of debugging technological parameters is simple, convenient and time-saving.
Specifically, the motion control system includes a motion control card and a multi-axis guide rail. The motion control card is used for monitoring and controlling the cutting speed and the cutting position of the laser system. The laser control system comprises a laser control card, the laser control card sends out a corresponding control instruction according to the received laser frequency data provided by the industrial personal computer, and the control instruction comprises the frequency and the pulse energy of laser.
When laser cutting is actually carried out, the working process and the principle of the cutting parameter control method are as follows: the laser cutting process is that the motion control card feeds back cutting position data to an industrial personal computer, the industrial personal computer sends the cutting position data to the laser control card through pulse width set in software, basic frequency set in each section respectively and specific change numerical values of different positions, speeds and corresponding frequencies, the laser control card converts digital signals into analog signals and sends the analog signals to a laser, and the laser (namely a laser system) performs light emitting cutting according to the received frequency and pulse width after receiving the signals.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A method for cutting a polarizer is characterized in that the polarizer is processed by laser cutting so as to form a cutting path at the peripheral edge of the polarizer, and the method comprises the following steps:
dividing the cutting path into a plurality of fillet cutting sections and a plurality of straight line cutting sections; the fillet cutting section is positioned at each corner of the periphery of the polaroid, and the linear cutting section is positioned at each edge of the periphery of the polaroid;
setting cutting parameters of each fillet cutting segment and each straight line cutting segment respectively and independently;
and carrying out laser cutting on the polaroid according to the cutting parameters.
2. The method of claim 1, wherein the cutting parameters include one or more of laser frequency, cutting speed, and laser pulse energy.
3. The method of cutting a polarizer according to claim 2, wherein the laser frequency comprises a fundamental frequency, an actual frequency, a frequency percentage of the cutting laser; the basic frequency is a set frequency of a laser, the actual frequency is a frequency of laser actually emitted by the laser, and the frequency percentage is a ratio of the actual frequency to the basic frequency;
the laser pulse energy is a single pulse energy of the laser.
4. The method of cutting a polarizer according to claim 3, wherein a frequency percentage-velocity graph is calculated from the frequency percentage and the cutting velocity.
5. The method of cutting a polarizer according to claim 3, wherein the cutting path between two adjacent rounded cut segments is divided into at least two straight cut segments.
6. The method for cutting a polarizer according to claim 2, wherein the cutting process of any one of the rounded corner cutting segments or any one of the linear cutting segments comprises at least a variable acceleration process, a constant velocity process and a variable deceleration process.
7. The laser cutting device for the polaroid is characterized by comprising an industrial personal computer, a laser control system, a motion control system and a laser system, wherein the industrial personal computer, the laser control system, the motion control system and the laser system are electrically connected;
the motion control system is used for feeding back the cutting speed information of the laser system to the industrial personal computer in real time;
the industrial personal computer calculates laser frequency data required during cutting according to preset cutting parameters and the cutting speed, and sends the laser frequency data to the laser control system;
the laser control system is used for receiving control information of the industrial personal computer and sending a control instruction to the laser system;
the laser system is used for emitting laser to cut according to the control instruction;
wherein, the industrial personal computer is preset with the cutting method as claimed in any one of claims 1 to 6.
8. The laser cutting device according to claim 7, wherein the motion control system comprises a motion control card for monitoring and controlling the cutting speed of the laser system;
the laser control system comprises a laser control card, the laser control card sends out a corresponding control instruction according to received laser frequency data provided by the industrial personal computer, and the control instruction comprises the frequency and pulse energy of laser.
9. The laser cutting device according to claim 7, wherein a frequency percentage-speed curve chart is preset in the industrial personal computer, and the frequency percentage-speed curve chart is manufactured according to the ratio of the frequency percentage of the laser emitted by the laser system to the cutting speed.
10. The laser of claim 7Cutting device, characterized in that the laser system employs CO2A laser.
Priority Applications (1)
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| CN202110727294.8A CN113441848B (en) | 2021-06-29 | 2021-06-29 | Cutting method and cutting device for polaroid |
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| CN202110727294.8A CN113441848B (en) | 2021-06-29 | 2021-06-29 | Cutting method and cutting device for polaroid |
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| CN113441848A true CN113441848A (en) | 2021-09-28 |
| CN113441848B CN113441848B (en) | 2022-05-06 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100036069A (en) * | 2008-09-29 | 2010-04-07 | (주)와이티에스 | Laser nozzle apparatus for cutting polaroid film |
| CN107505918A (en) * | 2017-08-15 | 2017-12-22 | 浙江工业大学 | A kind of speed planning method of cutting machine |
| CN110014227A (en) * | 2019-04-25 | 2019-07-16 | 大族激光科技产业集团股份有限公司 | It is a kind of for cutting the laser cutting method and laser cutting system of polaroid |
| CN110497101A (en) * | 2019-08-26 | 2019-11-26 | 大连理工大学 | A kind of optical-fiber laser cutting blade profile hole regulation of energy method of sheet metal |
| CN210878128U (en) * | 2019-10-09 | 2020-06-30 | 福建蒂摩斯光电科技有限公司 | Polaroid cutting device |
-
2021
- 2021-06-29 CN CN202110727294.8A patent/CN113441848B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100036069A (en) * | 2008-09-29 | 2010-04-07 | (주)와이티에스 | Laser nozzle apparatus for cutting polaroid film |
| CN107505918A (en) * | 2017-08-15 | 2017-12-22 | 浙江工业大学 | A kind of speed planning method of cutting machine |
| CN110014227A (en) * | 2019-04-25 | 2019-07-16 | 大族激光科技产业集团股份有限公司 | It is a kind of for cutting the laser cutting method and laser cutting system of polaroid |
| CN110497101A (en) * | 2019-08-26 | 2019-11-26 | 大连理工大学 | A kind of optical-fiber laser cutting blade profile hole regulation of energy method of sheet metal |
| CN210878128U (en) * | 2019-10-09 | 2020-06-30 | 福建蒂摩斯光电科技有限公司 | Polaroid cutting device |
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