CN101700957A - Method for removing microcrack at glass edge and improving glass strength - Google Patents
Method for removing microcrack at glass edge and improving glass strength Download PDFInfo
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- CN101700957A CN101700957A CN200910272606A CN200910272606A CN101700957A CN 101700957 A CN101700957 A CN 101700957A CN 200910272606 A CN200910272606 A CN 200910272606A CN 200910272606 A CN200910272606 A CN 200910272606A CN 101700957 A CN101700957 A CN 101700957A
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- 239000011521 glass Substances 0.000 title claims abstract description 147
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000003068 static effect Effects 0.000 claims description 6
- 239000005357 flat glass Substances 0.000 claims description 4
- 230000008030 elimination Effects 0.000 claims 1
- 238000003379 elimination reaction Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract description 6
- 238000002161 passivation Methods 0.000 description 7
- 238000011282 treatment Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 238000013532 laser treatment Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000005361 soda-lime glass Substances 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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- Laser Beam Processing (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The invention relates to a method for removing microcrack at glass edges and improving glass strength, which is characterized by comprising the following steps: 1) aligning light spot of a CO2 laser with one edge of glass to be processed; 2) regulating output power of the CO2 laser; 3) regulating the distance between the CO2 laser and the glass edge to be processed and regulating the size of the light spot of the CO2 laser; and 4) regulating moving velocity of the glass to be processed corresponding to the CO2 laser; fixing the CO2 laser, fixing the glass to be processed on a movable platform with an adjustable velocity, and regulating the moving velocity of the movable platform to be 0.05-1mm/s; and respectively processing four edges of the glass to form a glass board with improved strength. The invention can be realized at normal temperature, can perform laser processing on glass edges to remove microcrack without need of preheating the glass board; compared with the traditional methods, the strength of the glass passivated by laser through the method in the invention is improved by about three times, thus satisfying requirement of real application.
Description
Technical field
The present invention relates to a kind of method that the glass edge tiny crack improves strength of glass of eliminating.
Background technology
Along with the development of industries such as electronics and special glass, as various types of flat panel display base plate glass and used for solar batteries glass, they are more and more higher to the requirement of glass.Glasswork need be heated to high temperature repeatedly and handle, and at this moment the tiny crack at the effect lower glass plate edge of thermal stresses is easy to expand and causes breaking of whole plate face.And the cutting of existing glass generally adopts diamond cutter or Wimet break bar to mark indentation one at glass surface, fractures with fracture equipment at last.This method inevitably produces fine crack at glass edge, and glass intensity is declined to a great extent, and can only reach 1/2～1/3 of theoretical numerical value.
In the glasswork transportation and the course of processing, many factors can cause along breaking that its edge begins.And because the existence of sharp edges is easy to cause the generation of casualty accident.In order to improve glass intensity and security, be necessary the glass section after the cutting is carried out Passivation Treatment.
Glass treatment method commonly used such as mechanical polishing and chemical rightenning, though minimizing in various degree the section tiny crack, improved glass intensity, to improving the DeGrain of strength of glass, be badly in need of seeking new glassivation treatment process.Laser technology is applied to cut and weld the history in existing more than 30 year of sheet metal, cuts or welds by focused beam local heating material.This method handiness is good, and the economic benefit height is widely used in many industries.
At present, cause glass heat to burst, need glass is preheated to 500-600 ℃ for fear of the big temperature difference that causes because of laser radiation, complex process, tooling cost height, and be mainly used in the processing of block silica glass.
Summary of the invention
The object of the present invention is to provide a kind of method that the glass edge tiny crack improves strength of glass of eliminating, this method technology is simple, strength of glass is improved.
The object of the present invention is achieved like this: eliminate the method that the glass edge tiny crack improves strength of glass, it is characterized in that it comprises the steps:
1) with CO
2The hot spot of laser apparatus is aimed at the edge of pending glass;
2) regulate CO
2The output rating of laser apparatus makes CO
2The output rating of laser apparatus is 20-80W;
3) regulate CO
2The distance at the edge of laser apparatus and pending glass, adjusting spot size: the edge of pending glass is placed and CO
2The focus point of laser apparatus is at a distance of the position of 70～140mm, and making the spot size on the edge of pending glass is 3～11mm;
4) regulate pending glassy phase to CO
2The rate travel of laser apparatus: CO
2Laser apparatus maintains static, and pending glass is fixed on the motion platform of adjustable-speed, and the rate travel of adjustment movement platform is 0.05～1mm/s; Handle four edges of glass respectively, form the sheet glass that intensity is improved.
Described step 1) with CO
2The hot spot of laser apparatus is aimed at the edge of pending glass: with CO
2The laser beam that laser apparatus sends and the edge-perpendicular of pending glass, hot spot is aimed at the edge of pending glass, makes hot spot be in the center at the edge of pending glass.
Described CO
2The optimum value of the rate travel of laser output power, spot size and motion platform (being pending glass rate travel) changes between 20～80W, 3～11mm, 0.05～1mm/s respectively with the variation in thickness of different glass system and glass.
Because of glass has the thermal conduction lower than metal, and wavelength is the CO of 10.6um
2Laser output wave band just in time is an atmospheric window, and glass can absorb laser energy consumingly, in order to obtain the glass edge of non-microcracked or less tiny crack, can utilize laser technology to eliminate the glass edge tiny crack and improve intensity.
The invention has the beneficial effects as follows: with CO
2Laser is main processing tool, by with CO
2Laser beam focuses on glass surface and makes its fusing (CO at normal temperatures,
2Laser direct radiation glass edge is eliminated the edge tiny crack), utilize the effect of glass surface tension to eliminate glass edge crackle raising strength of glass.By control CO
2The output rating of laser apparatus, the size of hot spot, glassy phase can realize the processing to different system glass and different thickness glass to the rate travel of laser apparatus, reach the purpose of passivation; Glass intensity is compared with traditional method after the laser passivation, through CO
2Glass intensity is significantly improved after the laser Passivation Treatment, satisfies the demand of practical application.
Description of drawings
Fig. 1 is an artwork of the present invention;
The edge morphology change synoptic diagram of Fig. 2 A glass before laser treatment;
The edge morphology change synoptic diagram of Fig. 2 B glass after laser treatment;
Among the figure: 1-motion platform, the pending glass of 2-, 3-CO
2Laser apparatus, the 4-laser beam.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with Fig. 1, Fig. 2, embodiment, but content of the present invention not only is confined to the following examples.
Embodiment 1:
Eliminate the method that the glass edge tiny crack improves strength of glass, it comprises the steps:
1) get the ordinary flat soda-lime-silica glass, thickness is 5mm, is of a size of 45 * 100mm; The cleaning glass surface removes pollutents such as dust, is fixed on the motion platform shown in Figure 11;
With CO
2The hot spot of laser apparatus is aimed at the edge of pending glass: with CO
2The laser beam 4 that laser apparatus 3 sends and the edge-perpendicular of pending glass 2, hot spot is aimed at the edge of pending glass, makes hot spot be in the center at the edge of pending glass;
2) regulate CO
2The output rating of laser apparatus makes CO
2The output rating of laser apparatus is 60W;
3) regulate CO
2The distance at the edge of laser apparatus and pending glass, adjusting spot size: the edge and the CO that regulate pending glass
2The focus point position of laser apparatus, making the spot size on the edge of pending glass is 3mm;
4) regulate pending glassy phase to CO
2The rate travel of laser apparatus: CO
2Laser apparatus maintains static (pending glass is fixed on the motion platform of adjustable-speed), the rate travel of adjustment movement platform is 0.2mm/s, handle four edges of glass respectively, handle the tiny crack basically eliminate of back glass edge, its edge pattern is shown in Fig. 2 B.As can be seen, glass edge is after laser treatment, and it is very slick and sly that sharp edges has become, and tiny crack is eliminated.Before the processing, the average flexural strength of tested glass is 70.5MPa, and after laser treatment, its intensity is 115.5MPa.Comparative analysis is through CO
2Glass intensity is significantly improved after the laser Passivation Treatment.
Embodiment 2:
Eliminate the method that the glass edge tiny crack improves strength of glass, it comprises the steps:
1) get the ordinary flat soda-lime-silica glass, thickness is 3mm, is of a size of 45 * 100mm; The cleaning glass surface removes pollutents such as dust, is fixed on the motion platform shown in Figure 1;
With CO
2The hot spot of laser apparatus is aimed at the edge of pending glass: with CO
2The laser beam 4 that laser apparatus 3 sends and the edge-perpendicular of pending glass 2, hot spot is aimed at the edge of pending glass, makes hot spot be in the center at the edge of pending glass;
2) regulate CO
2The output rating of laser apparatus makes CO
2The output rating of laser apparatus is 40W;
3) regulate CO
2The distance at the edge of laser apparatus and pending glass, adjusting spot size: the edge and the CO that regulate pending glass
2The position of the focus point of laser apparatus, making the spot size on the edge of pending glass is 3mm;
4) regulate pending glassy phase to CO
2The rate travel of laser apparatus: CO
2Laser apparatus maintains static (pending glass is fixed on the motion platform of adjustable-speed), the rate travel of adjustment movement platform is 0.1mm/s, handle four edges of glass respectively, handle the tiny crack basically eliminate of back glass edge, its edge pattern is shown in Fig. 2 B, and it is slick and sly that sharp glass edge becomes.Before the processing, be 66.3MPa with the average flexural strength of universal testing machine tested glass, handle the average flexural strength 99.5MPa in back, intensity is significantly improved.
Embodiment 3:
Eliminate the method that the glass edge tiny crack improves strength of glass, it comprises the steps:
1) the plate ultra-clear glasses of making even, thickness is 3mm, is of a size of 45 * 100mm; The cleaning glass surface removes pollutents such as dust, is fixed on the motion platform shown in Figure 1;
With CO
2The hot spot of laser apparatus is aimed at the edge of pending glass: with CO
2The laser beam 4 that laser apparatus 3 sends and the edge-perpendicular of pending glass 2, hot spot is aimed at the edge of pending glass, makes hot spot be in the center at the edge of pending glass;
2) regulate CO
2The output rating of laser apparatus makes CO
2The output rating of laser apparatus is 60W;
3) regulate CO
2The distance at the edge of laser apparatus and pending glass, adjusting spot size: the edge and the CO that regulate pending glass
2The position of the focus point of laser apparatus, making the spot size on the edge of pending glass is 3mm;
4) regulate pending glassy phase to CO
2The rate travel of laser apparatus: CO
2Laser apparatus maintains static, pending glass is placed on the motion platform of adjustable-speed, the rate travel of adjustment movement platform is 0.05mm/s, handle four edges of glass respectively, handle the tiny crack basically eliminate of back glass edge, form the sheet glass that intensity is improved, its edge pattern is shown in Fig. 2 B, and the glass edge situation obtains changing.Handle the average 72.5MPa of average flexural strength of front glass, that handles back glass on average is bent into 108.8MPa.Through CO
2Glass intensity is improved after the laser passivation.
Embodiment 4:
Eliminate the method that the glass edge tiny crack improves strength of glass, it comprises the steps:
1) the plate ultra-clear glasses of making even, thickness is 8mm, is of a size of 45 * 100mm; The cleaning glass surface removes pollutents such as dust, is fixed on the motion platform shown in Figure 1;
1) with CO
2The hot spot of laser apparatus is aimed at the edge of pending glass: with CO
2The laser beam that laser apparatus sends and the edge-perpendicular of pending glass, hot spot is aimed at the edge of pending glass, makes hot spot be in the center at the edge of pending glass;
2) regulate CO
2The output rating of laser apparatus makes CO
2The output rating of laser apparatus is 80W;
3) regulate CO
2The distance at the edge of laser apparatus and pending glass, adjusting spot size: the edge and the CO that regulate pending glass
2The position of the focus point of laser apparatus, making the spot size on the edge of pending glass is 11mm;
4) regulate pending glassy phase to CO
2The rate travel of laser apparatus: CO
2Laser apparatus maintains static (pending glass is fixed on the motion platform of adjustable-speed), and the rate travel of adjustment movement platform is 1mm/s, handles four edges of glass respectively, and its edge pattern is shown in Fig. 2 B, and the glass edge situation obtains changing.Handle the average 72.5MPa of average flexural strength of front glass, that handles back glass on average is bent into 110.5MPa.Through CO
2Glass intensity is improved after the laser passivation.
Annotate: the bound value of each processing parameter of the present invention (as output rating, spot size, rate travel etc.), with and interval value, can both realize the present invention.Actual parameter will be regulated according to kind, the size of glass, does not enumerate embodiment one by one at this.
Claims (2)
1. eliminate the method that the glass edge tiny crack improves strength of glass, it is characterized in that it comprises the steps:
1) with CO
2The hot spot of laser apparatus is aimed at the edge of pending glass;
2) regulate CO
2The output rating of laser apparatus makes CO
2The output rating of laser apparatus is 20-80W;
3) regulate CO
2The distance at the edge of laser apparatus and pending glass, adjusting spot size: the edge of pending glass is placed and CO
2The focus point of laser apparatus is at a distance of the position of 70～140mm, and making the spot size on the edge of pending glass is 3～11mm;
4) regulate pending glassy phase to CO
2The rate travel of laser apparatus: CO
2Laser apparatus maintains static, and pending glass is fixed on the motion platform of adjustable-speed, and the rate travel of adjustment movement platform is 0.05～1mm/s; Handle four edges of glass respectively, form the sheet glass that intensity is improved.
2. elimination glass edge tiny crack according to claim 1 improves the method for strength of glass, it is characterized in that: described step 1) with CO
2The hot spot of laser apparatus is aimed at the edge of pending glass: with CO
2The laser beam that laser apparatus sends and the edge-perpendicular of pending glass, hot spot is aimed at the edge of pending glass, makes hot spot be in the center at the edge of pending glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910272606XA CN101700957B (en) | 2009-10-30 | 2009-10-30 | Method for removing microcrack at glass edge and improving glass strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910272606XA CN101700957B (en) | 2009-10-30 | 2009-10-30 | Method for removing microcrack at glass edge and improving glass strength |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101700957A true CN101700957A (en) | 2010-05-05 |
| CN101700957B CN101700957B (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910272606XA Expired - Fee Related CN101700957B (en) | 2009-10-30 | 2009-10-30 | Method for removing microcrack at glass edge and improving glass strength |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101700957B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103613290A (en) * | 2013-11-08 | 2014-03-05 | 蚌埠玻璃工业设计研究院 | Method for improving strength of glass |
| CN111875246A (en) * | 2020-06-29 | 2020-11-03 | 江苏亚威艾欧斯激光科技有限公司 | Laser processing system and laser processing method for protective substrate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61229487A (en) * | 1985-04-03 | 1986-10-13 | Sasaki Glass Kk | Method for cutting glass by laser beam |
| CN1283409C (en) * | 2001-08-10 | 2006-11-08 | 三星钻石工业股份有限公司 | Brittle material substrate chamfering method and chamfering device |
-
2009
- 2009-10-30 CN CN200910272606XA patent/CN101700957B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103613290A (en) * | 2013-11-08 | 2014-03-05 | 蚌埠玻璃工业设计研究院 | Method for improving strength of glass |
| CN103613290B (en) * | 2013-11-08 | 2015-07-08 | 蚌埠玻璃工业设计研究院 | Method for improving strength of glass |
| CN111875246A (en) * | 2020-06-29 | 2020-11-03 | 江苏亚威艾欧斯激光科技有限公司 | Laser processing system and laser processing method for protective substrate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101700957B (en) | 2012-06-27 |
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Granted publication date: 20120627 |
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