CN110255872A - A kind of high light transmission glass tempering technique - Google Patents
A kind of high light transmission glass tempering technique Download PDFInfo
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- CN110255872A CN110255872A CN201910495779.1A CN201910495779A CN110255872A CN 110255872 A CN110255872 A CN 110255872A CN 201910495779 A CN201910495779 A CN 201910495779A CN 110255872 A CN110255872 A CN 110255872A
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- tempering
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- 238000005496 tempering Methods 0.000 title claims abstract description 56
- 239000011521 glass Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000005540 biological transmission Effects 0.000 title claims abstract description 18
- 238000000137 annealing Methods 0.000 claims abstract description 44
- 238000001816 cooling Methods 0.000 claims abstract description 23
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000012360 testing method Methods 0.000 claims abstract description 9
- 230000011218 segmentation Effects 0.000 claims abstract description 4
- 238000010792 warming Methods 0.000 claims abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 20
- 238000011056 performance test Methods 0.000 abstract description 3
- 239000005304 optical glass Substances 0.000 description 10
- 238000011160 research Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The invention discloses a kind of high light transmission glass tempering technique, the following a. of method and step selects tempering furnace, and the tempering furnace of tempering furnace performance requirement is met by the test selection of tempering furnace thermal field；B. raw material are selected；C. product is placed；D. tempering is carried out, the first step is warming up to -10 DEG C of holding temperature；One hour of second step is to slowly warm up to holding temperature；Third step holding temperature keeps the temperature 50-60 hours；4th step holding temperature reduces by 100 ° by the practical calculating annealing rate of chunk glass；The cooling of 5th stepping row order segmentation；6th step is by being naturally cooling to room temperature.Compared with prior art, the present invention has the advantages that tempering equipment performance test, tempering process setting, raw material selection, high light transmission glass is solved in the annealing temperature-fall period of secondary press, since the thermal history of glass each section is different, the problem of causing structure different and regenerate the first kind and the second class optical heterogeneity.
Description
Technical field
The present invention relates to optical glass secondary forming field more particularly to a kind of high light transmission glass tempering techniques.
Background technique
Optical glass is the important component of optical system, is the core of optical instrument with the optical element that they are made into
The heart.Therefore extremely stringent to optical glass quality requirement to meet optical imagery demand.It is answered as existed in optical glass compared with imperial palace
Power, can make glass cold working when rupture, it is prior can make to generate in glass it is birefringent, so as to cause optical heterogeneity.
Product uniformity is undesirable, can reduce the resolution ratio and image quality of optical system picture.
The optical homogeneity of optical glass refers to the uniformity coefficient of refractive index, such as bad due to partially annealing, and may make glass
The refractive index of glass edge is lower than the refractive index at center, so that there are differences；Since glass is there are striped, calculus, can make glass its
The refractive index of his main part has differences with striped, calculus part, thus there is refractive index difference, such light in glass
The resolution ratio and image quality of optical system picture can be reduced by learning inhomogeneities.
It need to guarantee product uniformity from selection and annealing based on the above reasons.Our company is mainly engaged in optical glass secondary pressure
Type production, therefore influence of the main research annealing to optical glass.The optical heterogeneity of not annealed optical glass is being moved back
It being kept after a certain period of time in fiery temperature range, each section reaches unanimously, i.e., uniformity disappears in holding stage, but in annealing temperature
It spends in the temperature-fall period in range, since the thermal history difference of glass each section causes structure different and regenerates the first kind
And the second class optical heterogeneity.In order to control their inhomogeneities, it is necessary to select charging mode appropriate, holding temperature and
Cooling rate.
Summary of the invention
The object of the invention is that providing a kind of by tempering equipment performance test, tempering process setting, raw material choosing
Select etc. carries out innovation research, solves the high light transmission glass tempering technique of the above problem.
To achieve the goals above, the technical solution adopted by the present invention is that: a kind of high light transmission glass tempering technique, method
Steps are as follows
A. tempering furnace is selected, the tempering furnace of tempering furnace performance requirement is met by the test selection of tempering furnace thermal field；
B. raw material are selected；
C. product is placed；
D. tempering is carried out
The first step is warming up to -10 DEG C of holding temperature；
One hour of second step is to slowly warm up to holding temperature；
Third step holding temperature keeps the temperature 50-60 hours；
4th step holding temperature reduces by 100 ° by the practical calculating annealing rate of chunk glass；
The cooling of 5th stepping row order segmentation；
6th step is by being naturally cooling to room temperature.
Preferably, in step b, when selecting raw material, it is desirable that its annealing rate is 0.5 DEG C/h-1 DEG C/h.
Preferably, it is TG- (10-15 DEG C) temperature that the holding temperature, which is TG,.
Preferably, product modes of emplacement in step c, using multilayer annealing frame, every layer of annealing frame places stainless steel plate, no
One layer of aluminum silicate fiber paper is padded on rust steel plate, glass is concave upright to be put in fibrous paper, and wide gap is greater than between glass and glass
3cm。
Preferably, carrying out stage cooling in step d and using three sections of cooling sections, be followed successively by and dropped by -4 ° of annealing rates
Low 80 °；80 ° are reduced by -8 ° of annealing rates；80 ° are reduced by -16 ° of annealing rates.
Compared with the prior art, the advantages of the present invention are as follows: tempering equipment performance test, tempering process setting, raw material
Selection, solves high light transmission glass in the annealing temperature-fall period of secondary press, since the thermal history of glass each section is different,
The problem of causing structure different and regenerating the first kind and the second class optical heterogeneity.
Detailed description of the invention
Fig. 1 is process flow chart of the invention；
Fig. 2 is sample position and the schematic diagram data of tempering furnace thermal field of the present invention test.
Specific embodiment
The invention will be further described below.
Embodiment 1: referring to Fig. 1, a kind of high light transmission glass tempering technique, method and step is as follows
A. tempering furnace is selected, the tempering furnace of tempering furnace performance requirement is met by the test selection of tempering furnace thermal field, solves the
One type optical heterogeneity problem；
The main source of first kind optical heterogeneity is stove edge when cooling down being transferred to by holding temperature
Partially (product close to stove outer wall section) compared with center portion, (or a product is close to stove central portion
Point) cooling rate it is fast, by after a certain period of time, then there is refractive index difference in central part and marginal portion.One is produced
For the optical heterogeneity of product, it is desirable that n≤10 this difference △-6.Therefore one should be required to spot temperature each in tempering furnace
It causes.According to the size of chunk glass size and to the requirement of optical homogeneity, allow in tempering furnace each section there are temperature difference,
Usually require that its temperature difference should be less than 10 DEG C.
Mirror glass blank used in camera lens is hoped because high light transmission glass is mainly used in large-scale day, usually requires that light
Learn n≤10 uniformity △-5.Therefore thermal field uniformity≤± 3 DEG C are required when selecting tempering furnace.
The tempering furnace thermal field test method is as follows, chooses 9 pieces of samples of identical product, is respectively placed in four inside tempering furnace
A vertex, four face central points and tempering furnace center, choose 3 die mould samples of upper, middle and lower in furnace, and every sample processes 8
Refractive Index Sample, sample position and data such as Fig. 2, by testing above sample nd data, from its each place value nd size of the difference from
And confirm tempering furnace performance.Then it selects or debugs tempering equipment and reach required thermal field uniformity requirement.
When b. selecting raw material, it is desirable that its annealing rate is 0.5 DEG C/h-1 DEG C/h；
For the optical heterogeneity of a product, it is desirable that n≤10 this difference △-6.Second class optics is uneven
Even property is mainly generated by internal stress, directly proportional to glass size and cooling rate, is inversely proportional with the temperature diffusivity of glass, to same
One product, when using identical tempering rate, annealing rate is lower, and difference △ n is smaller, and uniformity more readily satisfies.
It chooses respectively: glass material K9,
A: 0.5 DEG C/H-1 DEG C/H of annealing rate；B: 1 DEG C/H-4 DEG C/H of annealing rate,
C: 4 DEG C/H-8 DEG C/H of annealing rate；D: 8 DEG C/H or more of annealing rate,
E: 0.5 DEG C/H or less of annealing rate.
Five groups of die mould product samples carry out annealing experiment comparison.Test result is as follows:
| Grouping | △ nd difference |
| A | 4X10-6 |
| B | 40X10-6 |
| C | 80X10-6 |
| D | 100X10-6 |
| E | 10X10-6 |
Therefore in the selection the smallest raw material of difference △ n, 0.5 DEG C/h to 1 DEG C/h of its annealing rate is usually required that.
C. product is placed
Product modes of emplacement, using multilayer annealing frame, every layer of annealing frame places stainless steel plate (thick 5mm), on stainless steel plate
Pad one layer of aluminum silicate fiber paper (thick 1-3mm), aluminum silicate fiber paper be suitable for hot environment under heat-insulation and heat-preservation, glass concave surface to
On be put in fibrous paper, wide gap is greater than 3cm between glass and glass, avoid amount of localized heat assemble and heating process among
It is even heated.
D. tempering is carried out
Find through our company research: high light transmission glass is below TG temperature in sizable range, inside glass structure group
Group has certain permanent displacement ability each other, can eliminate the uneven of the internal stress or internal structure generated in thermal history
Property, this temperature range is commonly referred to as annealing region, and ceiling temperature is known as highest annealing temperature, and three points at this temperature
Clock can eliminate stress 95%.Lower than this temperature range, do not change with glass structure, actually think " fixation ", i.e., not with adding
Heat and cooling approach and become, this temperature is known as lower limit temperature of annealing, and can only eliminate stress by three minutes at this temperature
5%.
Therefore it after we are using the long duration is kept the temperature near highest annealing temperature, tend to glass Each part will
It is uniform, then with suitably slowly cooling, minimum annealing temperature is cooled to the smallest temperature difference, obtained refractive index is more uniform
Optical glass.
Tempering process is as follows,
The first step is warming up to -10 DEG C of holding temperature；The holding temperature is TG- (10-15 DEG C) temperature；
One hour of second step is to slowly warm up to holding temperature；Slowly heating prevents chunk glass stress problem, causes
It bursts；
Third step holding temperature keeps the temperature 50-60 hours (can adjust according to practical batch)；Purpose is: making at holding temperature
Near highest annealing temperature, after keeping the temperature the long duration at this temperature, make glass Each part that will tend to be uniform；
4th step holding temperature reduces by 100 ° by the practical calculating annealing rate of chunk glass；Purpose is: step corrects glass
Blank optical constant is to claimed range；
The cooling of 5th stepping row order segmentation；
Increase by three sections of cooling sections, annealing temperature is minimized with minimum temperature difference, being followed successively by is reduced by -4 ° of annealing rates
80°；80 ° are reduced by -8 ° of annealing rates；80 ° are reduced by -16 ° of annealing rates.Purpose is: due to the deviation of straight line cooling, will increase
The optical heterogeneity for adding optical glass, the Glass optical constant and former calculated value after making annealing are inconsistent.Rapid cooling is to room
Wen Shi, product stress is excessive and bursts or edge stress is undesirable, existing to usually require that less than 15nm/
Cm, because Project Product is usually required that less than 5nm/cm, existing cooling method cannot be met the requirements, and the application carries out above-mentioned stage
It can stablize after cooling and be less than 5nm/cm.
6th step is by being naturally cooling to room temperature；
Exhaustive presentation has been carried out to a kind of high light transmission glass tempering technique provided by the present invention above, it is used herein
A specific example illustrates the principle and implementation of the invention, and the above embodiments are only used to help understand
Method and its core concept of the invention；At the same time, for those skilled in the art is having according to the thought of the present invention
There will be changes in body embodiment and application range, will be to change and improvement of the invention it is possible, without surpassing
The conception and scope of accessory claim defined out, in conclusion the content of the present specification should not be construed as to limit of the invention
System.
Claims (6)
1. a kind of high light transmission glass tempering technique, it is characterised in that: method and step is as follows
A. tempering furnace is selected, the tempering furnace of tempering furnace performance requirement is met by the test selection of tempering furnace thermal field；
B. raw material are selected；
C. product is placed；
D. tempering is carried out
The first step is warming up to -10 DEG C of holding temperature；
One hour of second step is to slowly warm up to holding temperature；
Third step holding temperature keeps the temperature 50-60 hours；
4th step holding temperature reduces by 100 ° by the practical calculating annealing rate of chunk glass；
The cooling of 5th stepping row order segmentation；
6th step is by being naturally cooling to room temperature.
2. a kind of high light transmission glass tempering technique according to claim 1, it is characterised in that: in step a, pass through tempering
The test of furnace temperature field carries out tempering furnace performance measurement, and method is as follows, chooses 9 pieces of samples of identical product, is respectively placed in tempering furnace
Four, portion vertex, four face central points and tempering furnace center, it is poor from its each place value nd by testing the above sample nd data
Value size is to confirm tempering furnace performance.
3. a kind of high light transmission glass tempering technique according to claim 1, it is characterised in that: in step b, select former material
When material, it is desirable that its annealing rate is 0.5 DEG C/h-1 DEG C/h.
4. a kind of high light transmission glass tempering technique according to claim 1, it is characterised in that: the holding temperature is
TG- (10-15 DEG C) temperature.
5. a kind of high light transmission glass tempering technique according to claim 1, it is characterised in that: product is placed in step c
Mode, using multilayer annealing frame, every layer of annealing frame places stainless steel plate, pads one layer of aluminum silicate fiber paper, glass on stainless steel plate
It is concave upright to be put in fibrous paper.
6. a kind of high light transmission glass tempering technique according to claim 1, it is characterised in that: in step d, carry out the stage
Formula cooling uses three sections of cooling sections, and being followed successively by reduces by 80 ° by -4 ° of annealing rates；80 ° are reduced by -8 ° of annealing rates；By -16 °
Annealing rate reduces by 80 °.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110818238A (en) * | 2019-12-11 | 2020-02-21 | 江苏通鼎光棒有限公司 | Annealing device and method for improving stress of preform |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101597134A (en) * | 2009-07-29 | 2009-12-09 | 成都光明光电股份有限公司 | Glass fine annealing device and annealing process thereof |
| CN103524042A (en) * | 2013-09-24 | 2014-01-22 | 河北省沙河玻璃技术研究院 | Environment-friendly type high-transmission high-refractivity crystalline glass and preparation method thereof |
| CN204718702U (en) * | 2015-05-29 | 2015-10-21 | 中国科学院上海硅酸盐研究所 | A kind of burner hearth temperature field measurement device |
| CN106116127A (en) * | 2016-06-16 | 2016-11-16 | 湖北新华光信息材料有限公司 | A kind of high evenness box-annealing furnace and method for annealing thereof |
| CN107032589A (en) * | 2017-06-12 | 2017-08-11 | 和县晶晶玻璃制品有限公司 | A kind of high-strength wearable glassware annealing process |
-
2019
- 2019-06-10 CN CN201910495779.1A patent/CN110255872A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101597134A (en) * | 2009-07-29 | 2009-12-09 | 成都光明光电股份有限公司 | Glass fine annealing device and annealing process thereof |
| CN103524042A (en) * | 2013-09-24 | 2014-01-22 | 河北省沙河玻璃技术研究院 | Environment-friendly type high-transmission high-refractivity crystalline glass and preparation method thereof |
| CN204718702U (en) * | 2015-05-29 | 2015-10-21 | 中国科学院上海硅酸盐研究所 | A kind of burner hearth temperature field measurement device |
| CN106116127A (en) * | 2016-06-16 | 2016-11-16 | 湖北新华光信息材料有限公司 | A kind of high evenness box-annealing furnace and method for annealing thereof |
| CN107032589A (en) * | 2017-06-12 | 2017-08-11 | 和县晶晶玻璃制品有限公司 | A kind of high-strength wearable glassware annealing process |
Non-Patent Citations (4)
| Title |
|---|
| 吴柏诚 等编著: "《玻璃制造技术》", 31 October 1993, 中国轻工业出版社 * |
| 李维民 等编著: "《稀土玻璃》", 31 May 2016, 冶金工业出版社 * |
| 胡开伟 等: ""大尺寸光学玻璃退火炉设计及炉内温场优化"", 《第 十七届全 国晶体生长与材料学术会议》 * |
| 赵文兴 等: ""光学玻璃精密退火炉的炉温均匀性研究"", 《光学机械》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110818238A (en) * | 2019-12-11 | 2020-02-21 | 江苏通鼎光棒有限公司 | Annealing device and method for improving stress of preform |
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