CN113134687B - Method for cutting circular hole of polaroid by laser - Google Patents
Method for cutting circular hole of polaroid by laser Download PDFInfo
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- CN113134687B CN113134687B CN202010053854.1A CN202010053854A CN113134687B CN 113134687 B CN113134687 B CN 113134687B CN 202010053854 A CN202010053854 A CN 202010053854A CN 113134687 B CN113134687 B CN 113134687B
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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
- B23K26/382—Removing material by boring or cutting by boring
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Abstract
The invention is applicable to the field of laser cutting of polaroids, and provides a method for laser cutting of circular holes of polaroids, which comprises the following steps of S1: taking a sheet material, and carrying out primary inspection on the sheet material; step S2: placing the sheet material on a carrying platform of a laser cutting machine, and confirming and positioning the direction of the sheet material; step S3: setting parameters of the cutting speed, the cutting frequency and the cutting energy of the laser cutting machine; step S4: the parameter setting is finished, the sheet is positioned through a positioning system of a laser cutting machine, the positioning is finished, the laser machine cuts the circular hole firstly and then cuts the edge, and the circular hole cutting of the polaroid is finished after the cutting of the edge of the sheet is finished; the technical problem of traditional cutting technique among the prior art, break bar direct contact product during the cutting can't satisfy the demand is solved.
Description
Technical Field
The invention belongs to the field of laser cutting of polaroids, and particularly relates to a method for cutting circular holes of a polaroid by using laser.
Background
The existing polaroid round hole cutting technology on the market at present mostly uses a cutter wheel, the cutter wheel cutting is mainly used for grinding the polaroid through stable and high-speed rotation, and a traditional process of reducing the temperature and taking away chips by using cooling liquid is needed in the cutting process. According to the traditional cutting technology, the cutter wheel directly contacts with a product during cutting, physical damage (such as scratch, deformation, crack and the like) is easily caused, the cutting precision of the round hole can only reach +/-0.2 mm and is unstable, and the requirement cannot be met.
The principle of laser cutting is that a focused high-power-density laser beam is used for irradiating a sheet material, so that the irradiated sheet material is rapidly melted, vaporized and ablated or reaches a burning point, and meanwhile, a high-speed airflow coaxial with the beam is used for blowing off molten substances, so that the sheet material is cut.
Disclosure of Invention
The invention aims to provide a method for cutting a polaroid by laser, and aims to solve the technical problems that in the prior art, a cutter wheel directly contacts a product during cutting, physical damage (such as scratching, deformation, cracks and the like) is easily caused, the cutting precision of a circular hole can only reach +/-0.2 mm, the circular hole is unstable and cannot meet the requirement.
The invention is realized in this way, a method for laser cutting round holes of a polaroid, which comprises the following steps:
step S1: taking a sheet material, and carrying out primary inspection on the sheet material;
step S2: placing the sheet material on a carrying platform of a laser cutting machine, and confirming and positioning the direction of the sheet material;
step S3: setting parameters of the cutting speed, the cutting frequency and the cutting energy of the laser cutting machine;
step S3 further includes the steps of:
step S31: the cutting speed is 40 +/-5 mm per second;
step S32: the cutting frequency is 1 +/-0.5 HZ;
step S33: the cutting energy is 2.5 +/-0.5W;
step S4: and (3) completing parameter setting, positioning the sheet through a positioning system of the laser cutting machine, completing the positioning, cutting the round hole by the laser machine, then cutting the edge, and completing the cutting of the polaroid after the cutting of the edge of the sheet is completed.
The further technical scheme of the invention is as follows: the preliminary inspection in step S1 requires inspection of the sheet for the appearance of foreign matter, marks, and scratches, and also requires inspection of the sheet surface for soiling.
The further technical scheme of the invention is as follows: the soil was checked by ethyl ester plus dust-free cloth.
The further technical scheme of the invention is as follows: the step S1 further includes the steps of:
step S11: and cutting corners of the sheet to identify the direction, and spraying codes at the positions corresponding to the polaroids on the sheet to identify the type.
The further technical scheme of the invention is as follows: the step 4 further comprises the following steps:
step S41: and monitoring the operation stability of the laser cutting machine.
The further technical scheme of the invention is as follows: and monitoring the operation stability, including monitoring the film tearing force, the edge melting and the burr numerical value change.
The further technical scheme of the invention is as follows: the sheet is a polaroid sheet made of CRT or APCF materials.
The further technical scheme of the invention is as follows: the thickness of the sheet is 0.1-0.3 mm.
The further technical scheme of the invention is as follows: the sheet was 5-7 inches in size.
The further technical scheme of the invention is as follows: the method further comprises the steps of:
step S5: taking out the cut polaroid and carrying out full inspection;
step S6: packaging the polaroids qualified by full inspection and ex-warehouse
The invention has the beneficial effects that: the method has the obvious advantages of high precision (the round hole cutting precision can reach 0.05 mm), high speed, high laser cutting stability, easy processing of soft materials, one-step forming, simple process and great reduction of labor cost.
Drawings
Fig. 1 is a flowchart illustrating steps of a method for laser cutting a circular hole of a polarizer according to an embodiment of the present invention.
Detailed Description
Fig. 1 illustrates a method for laser cutting a polarizer, which includes the following steps:
take a semi-automatic laser cutting machine as an example;
step S1: taking a sheet, carrying out primary inspection on the sheet, and carrying out corner shearing on the sheet so as to identify the direction; the sheet is a polaroid sheet made of CRT or APCF materials; the thickness of the sheet is 0.1-0.3 mm; the size of the sheet is 5-7 inches; the preliminary inspection needs to inspect whether the sheet has foreign matters, marks and top damages in appearance, and also needs to inspect whether the sheet surface is dirty; the dirt is checked by ethyl ester and dust-free cloth; and the position of each polarizer on the sheet material is required to be subjected to code spraying so as to identify the model.
Step S2: placing the sheet on an object carrying platform of a semi-automatic laser cutting machine, confirming the direction of the sheet through corner shearing, and aligning the sheet with the edge of the object carrying platform to position the sheet;
step S3: setting parameters of the cutting speed, the cutting frequency and the cutting energy of the semi-automatic laser cutting machine;
step S3 further includes the steps of:
step S31: the cutting speed is 40 +/-5 mm per second; the optimal cutting speed is 40 +/-5 mm per second obtained by DOE through 3-factor data, when the cutting speed is 40 +/-5 mm per second, the influence on the productivity is minimum, the quality of a cut product is confirmed to be abnormal, when the cutting speed is 30mm per second, the TT (Tilt Time, which means the Time for producing one polaroid) of cutting a 6.5-inch polaroid can rise by 1s, and when the cutting speed is 50mm + per second, burrs at the edge of a cut round hole occasionally exceed the standard, and a part cannot be normally separated;
step S32: the cutting frequency is 1 +/-0.5 HZ; the DOE adopts 3-factor data to obtain the optimal cutting frequency of 1 +/-0.5 HZ, when the cutting frequency is 1 +/-0.5 HZ, the cut circular hole of the polaroid can meet the requirements that the fused edge is less than or equal to 100um, the film tearing force of a CRT material is less than or equal to 15g, and the film tearing force of an APCF material is less than or equal to 8 g; and with the cutting frequency less than 0.5HZ, part of the polaroids can not be normally separated and have burrs; the cutting frequency of more than 1.5HZ is adopted, the fused edge value of part of the polaroid exceeds the standard, the film tearing force is more than 15g, and the requirements are not met;
step S33: the cutting energy is 2.5 +/-0.5W; the optimal cutting energy obtained by DOE through adopting 3-factor data is 2.5 +/-0.5W, and when the cutting energy is 2.5 +/-0.5W, the circular holes of the polaroid cut at one time can be optimal in separability, and the phenomena of edge burrs and scorching are avoided; when energy less than 2W is adopted, part of the polaroids cannot be normally separated and burrs exist; when the energy of more than 3W is adopted, the edge melting value of part of the polaroid exceeds the standard, the film tearing force is more than 15g, and the requirement is not met;
step S4: the parameters are set, the sheet is positioned through a positioning system of the semi-automatic laser cutting machine, the positioning is completed, the laser machine cuts the circular hole firstly and then cuts the edge, and the circular hole cutting of the polaroid is completed after the cutting of the edge of the sheet is completed; monitoring the operation stability of the semi-automatic laser cutting machine; the operation stability monitoring comprises monitoring the film tearing force, the edge melting and the burr numerical value change.
Step S5: taking out the cut polaroid and carrying out full inspection;
step S6: and packaging the polaroids qualified by full inspection and ex-warehouse.
The same parameter setting is adopted for the polaroids made of different materials through design, or different embodiments of different parameter settings are adopted for the polaroids made of the same material through design to carry out verification;
example 1: cutting a circular polarizer hole made of a CRT material at a cutting speed of 35mm, a cutting energy of 2W and a cutting frequency of 0.5HZ at the step S1-6 as described above at the step S3;
example 2: cutting the circular holes of the polarizer made of the CRT material by adopting the step S1-6 as described above and the step S3 with the cutting speed of 45mm, the cutting energy of 3W and the cutting frequency of 1.5 HZ;
example 3: cutting the APCF polarizer circular hole by adopting the step S1-6 and the step S3 with the cutting speed of 35mm, the cutting energy of 2W and the cutting frequency of 0.5 HZ;
the following data are the average of each 100 sets of data, and the specification requirements are as follows:
appearance: the visual defects such as edge burrs, cracks, convex edges and the like cannot be allowed, and the edges are melted: less than or equal to 100um, cutting accuracy (the monomer can't be measured, client CPK requires CPK to be more than or equal to 1.33), dyestripping power: the material quality of CRT is less than or equal to 15g, the material quality of APCF is less than or equal to 8g, and the burr is less than or equal to 25 um.
The resulting verification results are listed by the subscripts:
| examples of the present invention | Appearance of the product | Edge melting | Client circular hole CPK precision | Film tearing force | Burrs of a ship |
| Example 1 | Inspecting the edges for defects such as burr-free cracks | 55 | 1.37 | 8.656 | 16 |
| Example 2 | Inspecting the edges for defects such as burr-free cracks | 49 | 1.56 | 6.558 | 11 |
| Example 3 | Inspecting the edges for defects such as burr-free cracks | 36 | 1.68 | 4.356 | 13 |
| Results | OK | OK | OK | OK | OK |
The verification data of the embodiment shows that the laser cutting of the circular holes of the polaroid can be realized by adopting the cutting speed, the cutting frequency and the cutting energy of the method, the laser cutting has small heat influence, the requirement of the edge melting can be less than or equal to 100um, the non-contact processing is realized, and compared with the traditional cutter wheel cutting, the method has the obvious advantages that the physical damage, such as scratching, deformation, cracks and the like, of the sheet can be well improved, the precision is high (the cutting precision can reach 0.05 mm), the speed is high, the laser cutting stability is high, the soft material is easier to process, the one-step forming is realized, the process is simple, and the labor cost is greatly reduced.
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 and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A method for cutting circular holes of a polarizer by laser is characterized by comprising the following steps:
step S1: taking a sheet material, and carrying out primary inspection on the sheet material;
step S2: placing the sheet material on a carrying platform of a laser cutting machine, and confirming and positioning the direction of the sheet material;
step S3: setting parameters of the cutting speed, the cutting frequency and the cutting energy of the laser cutting machine;
step S3 further includes the steps of:
step S31: the cutting speed is 40 +/-5 mm per second;
step S32: the cutting frequency is 1 +/-0.5 HZ;
step S33: the cutting energy is 2.5 +/-0.5W;
step S4: and (3) completing parameter setting, positioning the sheet through a positioning system of the laser cutting machine, completing the positioning, cutting the round hole by the laser machine, then cutting the edge, and completing the cutting of the polaroid after the cutting of the edge of the sheet is completed.
2. The method of laser cutting a polarizer circular hole according to claim 1, wherein the preliminary inspection in step S1 requires inspection of the sheet for the appearance of foreign matter, marks, and scratches, and also inspection of the surface of the sheet for soiling.
3. A method for laser cutting a polarizer circular hole according to claim 2, wherein the contamination is checked by ethyl ester plus dust-free cloth.
4. The method for laser cutting a polarizer circular hole according to claim 3, wherein the step S1 further comprises the steps of:
step S11: and cutting corners of the sheet to identify the direction, and spraying codes at the positions corresponding to the polaroids on the sheet to identify the type.
5. A method for laser cutting a polarizer circular hole according to claim 1, wherein the step 4 further comprises the steps of:
step S41: and monitoring the operation stability of the laser cutting machine.
6. The method of claim 5, wherein the monitoring of the operational stability comprises monitoring the numerical changes of film tearing force, edge melting and burr.
7. A method for laser cutting a polarizer circular hole according to any of claims 1 to 6, wherein the sheet is a polarizer sheet of CRT or APCF material.
8. A method for laser cutting a polarizer circular hole according to claim 7, wherein the thickness of the sheet is 0.1-0.3 mm.
9. A method for laser cutting a polarizer circular hole according to claim 8, wherein the size of the sheet is 5 to 7 inches.
10. A method of laser cutting a polarizer circular hole according to claim 1, further comprising the steps of:
step S5: taking out the cut polaroid and carrying out full inspection;
step S6: and packaging the polaroids qualified by full inspection and ex-warehouse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010053854.1A CN113134687B (en) | 2020-01-17 | 2020-01-17 | Method for cutting circular hole of polaroid by laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010053854.1A CN113134687B (en) | 2020-01-17 | 2020-01-17 | Method for cutting circular hole of polaroid by laser |
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| CN113134687A CN113134687A (en) | 2021-07-20 |
| CN113134687B true CN113134687B (en) | 2022-08-05 |
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| CN202010053854.1A Active CN113134687B (en) | 2020-01-17 | 2020-01-17 | Method for cutting circular hole of polaroid by laser |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100035449A (en) * | 2008-09-26 | 2010-04-05 | (주)와이티에스 | Laser apparatus for cutting polaroid film |
| CN106475680B (en) * | 2016-12-09 | 2018-12-07 | 深圳市吉祥云科技有限公司 | A method of using OCA optical cement in laser dismantling interlayer |
| CN109702332B (en) * | 2019-02-11 | 2022-04-26 | 大族激光科技产业集团股份有限公司 | Laser processing method and laser processing system for polaroid |
| CN110303256A (en) * | 2019-07-01 | 2019-10-08 | 东莞市德普特电子有限公司 | A kind of laser special-shaped processing technology of polaroid |
| CN110480190A (en) * | 2019-07-29 | 2019-11-22 | 武汉华星光电技术有限公司 | The preparation method and cutter device of display device |
| CN110524123A (en) * | 2019-08-06 | 2019-12-03 | 苏州卡利肯新光讯科技有限公司 | A kind of laser cutting system and its cutting method |
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