CN109704544B - Prefabricated rod manufacturing device for optical element blank and element blank manufacturing method - Google Patents
Prefabricated rod manufacturing device for optical element blank and element blank manufacturing method Download PDFInfo
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- CN109704544B CN109704544B CN201910012809.9A CN201910012809A CN109704544B CN 109704544 B CN109704544 B CN 109704544B CN 201910012809 A CN201910012809 A CN 201910012809A CN 109704544 B CN109704544 B CN 109704544B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 60
- 230000003287 optical effect Effects 0.000 title claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims abstract description 45
- 239000011521 glass Substances 0.000 claims abstract description 44
- 239000005304 optical glass Substances 0.000 claims abstract description 31
- 238000005520 cutting process Methods 0.000 claims abstract description 30
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 13
- 230000007547 defect Effects 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 9
- 239000006060 molten glass Substances 0.000 claims description 9
- 238000003723 Smelting Methods 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 6
- 238000000748 compression moulding Methods 0.000 description 4
- 230000026058 directional locomotion Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a prefabricated rod manufacturing device for an optical element blank and an element blank manufacturing method. Belongs to the technical field of optical glass. The invention mainly solves the problem that the shape of the raw material is limited when the optical element is processed. It is mainly characterized in that: the device comprises a forming die, a first drawing device, a second drawing device, a heating device and a cutting device; the first drawing device is positioned below the forming die and used for forming the glass into a round thick rod; the heating device is positioned below the first drawing device and used for heating and softening the round thick rod; the second drawing device is positioned below the heating device and is used for drawing the round thick rod into a round thin rod; the cutting device is positioned below the second drawing device and is used for cutting the round slim rod. The invention can directly manufacture the round bar shape when manufacturing the optical glass, and the cross section shape of the round bar shape is close to the cross section of the required optical element, so the round bar shape can be directly sliced to manufacture the optical element blank.
Description
Technical Field
The invention belongs to the technical field of optical glass, and particularly relates to a manufacturing device of an optical glass rod for cutting blank sheets of an optical element and a manufacturing method of an optical element blank.
Background
The manufacturing method of the blank of the optical glass element comprises two methods: the first method is a pressing method, the second method is a slicing method, the slicing method is that a glass plate is made into a round bar through a plurality of procedures, and then the round bar is sliced into element blanks. The blank making by the compression molding method has great limitation, many optical glasses containing rare earth components cannot be subjected to primary compression molding, the blank making needs to be carried out by secondary compression molding, the secondary compression molding has various working procedures and complex equipment, a large number of operators are required, and the manufacturing cost is difficult to reduce; the slicing method for manufacturing the blank belongs to a cold machining process, the number of manufacturing processes is reduced by times compared with a compression method, but the low material utilization rate is the greatest defect, the material utilization rate is about 60 percent when the blank of the optical element is processed from a glass plate in the whole production process, and the cost increase caused by material waste accounts for a large proportion.
The manufacturing technology of the blank of the optical glass element is limited because the raw materials of the optical glass are plate-shaped materials, and the forming technology of the whole optical glass industry is limited to the production of the plate-shaped materials at present.
The invention provides a device and a method for manufacturing an optical element preform, which can directly manufacture the shape of optical glass into a round rod, and the round rod can realize most of the diameter required by an optical element and can be directly sliced into an optical element blank.
Disclosure of Invention
The invention aims to overcome the defects in the existing optical glass forming technology and provides a one-step forming device for an optical glass round rod product, which can directly manufacture molten glass guided from a smelting furnace into an optical glass round rod and slice the optical glass round rod into an optical element blank according to requirements during optical glass smelting production.
The technical solution of the manufacturing device of the invention is as follows: the utility model provides an optical element is prefabricated stick manufacturing installation for blank which characterized in that: the device comprises a forming die, a first drawing device, a heating device, a second drawing device and a cutting device; the first drawing device is positioned below the forming die and is used for forming the glass into a round thick rod; the heating device is positioned below the first drawing device and used for heating and softening the round thick rod; the second drawing device is positioned below the heating device and is used for drawing the round thick rod into a round thin rod; the cutting device is positioned below the second drawing device and is used for cutting the round slim rod. The circular thick rod in the technical scheme of the manufacturing device is a solid circular rod with the diameter of 25-45 mm; the round thin rod is a solid round rod with the diameter of 4-15 mm.
The forming die in the technical scheme of the manufacturing device is provided with a local cooling mechanism, a heating mechanism and a temperature control device thereof, and the glass liquid is gradually cooled to a certain temperature and then manufactured into a glass round rod with a larger diameter.
The heating elements of the heating device in the technical scheme of the manufacturing device are uniformly distributed along the circumference, the temperature is controllable, the round glass rod passes through the heating device, the periphery of the glass rod can be heated, the glass rod is melted to the required viscosity, and the purpose is to heat and soften the round glass rod with the larger diameter again.
The first drawing device and the second drawing device in the technical scheme of the manufacturing device are matched with a gripping device, power equipment and speed adjusting equipment which can firmly grip the glass rod, can grip an object and apply pulling force to a specified direction, can adjust and control the speed, can do directional motion according to the speed required by the process, and can draw the glass into a solid round rod.
The cutting device in the technical scheme of the manufacturing device is a cutting device with adjustable frequency, and can cut the round thin rod according to the set length on time.
The technical solution of the manufacturing method of the invention is as follows: a method of manufacturing an optical element blank, comprising the steps of:
manufacturing an optical element preform: raw materials are fed from a melting furnace, molten glass meeting the requirement of manufacturing optical glass is manufactured through a smelting process, and the molten glass flows into a forming die below through a material leaking pipe; forming the glass into a round thick rod by a first drawing device positioned below the forming die; the heating device positioned below the first drawing device heats and softens the round thick rod; a second drawing device positioned below the heating device draws the round thick rod softened by heating into a round thin rod of the optical glass with the diameter consistent with that of the element blank; the cutting device positioned below the second drawing device cuts the round thin rod;
testing the round thin rod of the optical glass: inspecting the diameter, surface defects, stripes and intrinsic defects of the round slim rods, and classifying and grading the round slim rod materials;
cutting into slices: slicing the qualified round glass rod into blank of element according to required thickness; and (4) performing barreling treatment on the parts with slight surface defects and different diameters, and then slicing to prepare element blanks.
The forming die in the first step in the technical scheme of the manufacturing method is provided with a local cooling mechanism, a heating mechanism and a temperature control device thereof; the round thick rod is a solid optical glass round thick rod with the diameter of 25-45 mm; the round thin rod is a solid optical glass round thin rod with the diameter of 4-15 mm.
The first and second drawing devices in the first step in the technical solution of the manufacturing method of the present invention are provided with a gripping device, a power device and a speed adjusting device which can firmly grip the glass rod; the heating elements of the heating device are uniformly distributed along the circumference, so that the surface of the round thick rod can be uniformly heated and softened.
The cutting device in the technical scheme of the manufacturing method is a cutting device with adjustable frequency, and can cut the round thin rod according to the set length on time. The invention has the following beneficial effects:
the optical element preform manufacturing device provided by the invention can directly manufacture the melted glass liquid into the glass round rod with the required diameter, the glass round rod has small diameter tolerance and small bending difference, and can be sliced into the optical element blank, the optical element blank is not different from the optical element blank manufactured by a pressing method or a glass plate slicing method, but a plurality of complicated processing procedures are omitted in the manufacturing process, and the material utilization rate is greatly improved.
Drawings
FIG. 1 is a schematic view showing the structure of an apparatus for manufacturing a preform for an optical glass element blank according to the present invention.
In the figure: 1-a material leakage pipe; 2-forming a mould; 3-a first drawing device; 4-a heating device; 5-a cutting device; 6-a second drawing device; 7-melting furnace; .
Detailed Description
The invention is further described below with reference to the following figures and examples.
An example is shown in figure 1. The invention provides a device for manufacturing a prefabricated rod for an optical element blank, which comprises a forming die 2, a first drawing device 3, a heating device 4, a second drawing device 6 and a cutting device 5. The first drawing device 3 is located below the forming die 2, the forming die 2 is provided with a local cooling mechanism, a heating mechanism and a temperature control device of the local cooling mechanism, the first drawing device 3 is provided with a gripping device, power equipment and speed adjusting equipment, the gripping device can firmly grip a glass rod, and the glass liquid is hardened and shaped into a solid round thick rod with the diameter of 25-45 mm after passing through the die. The heating device 4 is positioned below the first drawing device 3, and heating elements of the heating device 4 are uniformly distributed along the circumference, so that the surface of the round thick rod can be uniformly heated and softened. The second drawing device 6 is located below the heating device 4, the second drawing device 6 is provided with a gripping device, power equipment and speed adjusting equipment, the gripping device, the power equipment and the speed adjusting equipment can firmly grip the glass rod, the speed can be adjusted and controlled, directional motion can be carried out according to the speed required by the process, and the second drawing device is used for drawing the round thick rod into a solid round thin rod with the diameter of 4-15 mm. The cutting device 5 is positioned below the second drawing device 6 and is a cutting device with adjustable frequency and used for cutting the round thin rod, and the round thin rod can be cut according to a set length in time.
In the concrete implementation, the molten glass homogenized by the optical glass melting furnace 7 is manufactured by the device and then is directly manufactured into a small optical element preform rod with the diameter less than 15 mm. The implementation process specifically comprises the following steps: glass liquid passes through material leakage pipe 1 water conservancy diversion to forming die 2, and the different position designs of forming die 2 have different cooling methods, and the speed of drop-down can be adjusted as required to first drawing device 3, the unit interval shaping volume of control glass liquid, and forming die 2 cooperates first drawing device 3 like this, just can make thick circular stick with glass liquid according to certain process rules. The round thick rod continuously moves downwards and passes through the heating device 4, the heating device 4 controls the proper temperature to soften the surface of the glass thick rod, and the softened thick rod can be drawn into a thin rod material by matching with the downward drawing of the second drawing device 6.
When the manufacturing device of the optical element preform rod is used, a vertical drawing mode is adopted, and the glass rod is hung in the air and does not swing and is grasped and stabilized by a manipulator of the first drawing device 3. The first drawing device 3 and the second drawing device 6 have similar functions, but the structure and the drawing speed are greatly different in design, when in use, the first drawing device 3 matched with the forming die 2 performs uniform pull-down motion according to the forming volume, so that the consistency of the forming volume is ensured, namely the discharge amount of the smelting furnace is ensured to be fixed; the second drawing device 6, which is associated with the softening device 4, is not operated at a constant speed, and the down-draw speed thereof determines the diameter of the drawn thick rod, and if the temperature of the softening furnace is increased and the amount of softened glass is increased, the down-draw speed is required to be faster in order to keep the diameter of the thin glass rod constant.
When the manufacturing device of the optical element preform is used specifically, strict process rules exist, the temperature of each part of the forming die 2 needs to be strictly controlled, and glass can be ensured to be smoothly formed into a glass round rod through the die; the temperature of the softening device 4 needs to be accurately controlled, the temperature difference fluctuation is small, and the thick rod formed in advance can be uniformly heated and softened; the two sets of first drawing devices 3 and second drawing devices 6 with large differences need to meet different up-down running speeds, actually, the first drawing device 3 at the upper part is matched with a mould to form glass into a round rod, the diameter of the round rod is not a main control index at this time, the drawn round rod is thicker, the diameter is generally 25-45 mm, and the ovality is guaranteed to be a key point; the second drawing device 6 at the lower part is matched with a diameter measuring device, the drawing speed is adjusted at any time according to the diameter, and the thin rod with the consistent diameter is finally manufactured, the diameter of the thin rod is controlled according to the outer diameter of the optical element, and the diameter range is adjustable within 4-15 mm.
The optical element preform manufacturing device provided by the invention needs necessary auxiliary equipment, including a thermocouple, a temperature control instrument, a heating controller, a frequency modulation motor, a diameter measuring device, a speed regulator and the like, and is matched with an automatic digital conversion control instrument to assist in completing the whole production process, so that the purpose is to draw a glass slim rod with a controlled diameter.
The method for manufacturing the blank of the optical element comprises the following steps:
manufacturing an optical element preform: raw materials are fed from a melting furnace 7, molten glass meeting the requirements of manufacturing optical glass is manufactured through a smelting process, the molten glass flows into a forming die 2 below through a material leakage pipe 1, and the forming die 2 is provided with a local cooling mechanism, a heating mechanism and a temperature control device of the local cooling mechanism; the first drawing device 3 is arranged below the forming die 2, the speed can be regulated and controlled, directional motion can be carried out according to the speed required by the process, and the glass is drawn into a solid round thick rod with the diameter of 25-45 mm; heating elements of a heating device 4 which is positioned below the first drawing device 3 are uniformly distributed along the circumference, so that the surface of the round thick rod can be uniformly heated and softened; the second drawing device 6 is arranged below the heating device 4 and is provided with a gripping device, power equipment and speed adjusting equipment which can firmly grip the glass rod, the speed can be adjusted and controlled, directional motion can be carried out according to the speed required by the process, and the glass is drawn into a solid optical glass round thin rod with the diameter of 4-15 mm; the cutting device 5 positioned below the second drawing device 6 is a cutting device with adjustable frequency, and cuts the round slim rod according to the set length in time;
testing the round thin rod of the optical glass: inspecting the diameter, surface defects, stripes and intrinsic defects of the round slim rods, and classifying and grading the round slim rod materials;
cutting into slices: slicing the qualified round glass rod into blank of element according to required thickness; and (4) performing barreling treatment on the parts with slight surface defects and different diameters, and then slicing to prepare element blanks.
The optical element preform manufacturing device is the basis for realizing the element blank manufacturing method, and the element blank manufacturing method is to directly manufacture a glass thin rod meeting the requirements through a smelting furnace and slice the glass thin rod into the element blank.
Claims (10)
1. The utility model provides an optical element is prefabricated stick manufacturing installation for blank for optical element, is used for the optical glass stick's of optical element blank thin slice one shot forming, its characterized in that: comprises a forming die (2), a first drawing device (3), a heating device (4), a second drawing device (6) and a cutting device (5); the first drawing device (3) is positioned below the forming die (2) and is used for forming the glass into a round thick rod; the heating device (4) is positioned below the first drawing device (3) and is used for heating and softening the round thick rod; the second drawing device (6) is positioned below the heating device (4) and is used for drawing the round thick rod into a round thin rod; the cutting device (5) is positioned below the second drawing device (6) and is used for cutting the round slim rod.
2. An apparatus for fabricating an optical element blank preform according to claim 1, wherein: the round thick rod is a solid round rod with the diameter of 25-45 mm; the round thin rod is a solid round rod with the diameter of 4-15 mm.
3. An apparatus for fabricating an optical element blank preform according to claim 1 or 2, wherein: the forming die (2) is provided with a local cooling mechanism, a heating mechanism and a temperature control device thereof, and the molten glass is hardened and shaped into a round rod after passing through the die.
4. An apparatus for fabricating an optical element blank preform according to claim 1 or 2, wherein: the first and second drawing devices (3, 6) are provided with a gripping device, a power device and a speed adjusting device which can firmly grip the glass rod.
5. An apparatus for fabricating an optical element blank preform according to claim 1 or 2, wherein: the heating elements of the heating device (4) are uniformly distributed along the circumference, so that the surface of the round thick rod can be uniformly heated and softened.
6. An apparatus for fabricating an optical element blank preform according to claim 1 or 2, wherein: the cutting device (5) is a cutting device with adjustable frequency and can cut the round slim rod according to the set length on time.
7. A method for manufacturing an optical element blank using the preform manufacturing apparatus for a blank according to claim 1 or 2, characterized by comprising the steps of:
manufacturing an optical element preform: raw materials are fed from a melting furnace (7) and are subjected to a smelting process to produce molten glass meeting the requirements of manufacturing optical glass, and the molten glass flows into a forming die (2) below through a material leakage pipe (1); a first drawing device (3) positioned below the forming die (2) forms the glass into a round thick rod; a heating device (4) positioned below the first drawing device (3) heats and softens the round thick rod; a second drawing device (6) positioned below the heating device (4) draws the round rough rod softened by heating into a round thin rod of optical glass with the diameter consistent with that of the element blank; a cutting device (5) positioned below the second drawing device (6) cuts the round slim rod;
testing the round thin rod of the optical glass: inspecting the diameter, surface defects, stripes and intrinsic defects of the round slim rods, and classifying and grading the round slim rod materials;
cutting into slices: slicing the qualified round glass rod into blank of element according to required thickness; and (4) performing barreling treatment on the parts with slight surface defects and different diameters, and then slicing to prepare element blanks.
8. A method for manufacturing an optical element blank according to claim 7, wherein: the forming die (2) in the first step is provided with a local cooling mechanism, a heating mechanism and a temperature control device thereof; the round thick rod is a solid optical glass round thick rod with the diameter of 25-45 mm; the round thin rod is a solid optical glass round thin rod with the diameter of 4-15 mm.
9. The method of manufacturing an optical element blank according to claim 7 or 8, wherein: the first drawing device and the second drawing device (3 and 6) in the first step are provided with a gripping device, a power device and a speed adjusting device which can firmly grip the glass rod; the heating elements of the heating device (4) are uniformly distributed along the circumference, so that the surface of the round thick rod can be uniformly heated and softened.
10. The method of manufacturing an optical element blank according to claim 7 or 8, wherein: the cutting device (5) is a cutting device with adjustable frequency and can cut the round slim rod according to the set length on time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910012809.9A CN109704544B (en) | 2019-01-07 | 2019-01-07 | Prefabricated rod manufacturing device for optical element blank and element blank manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910012809.9A CN109704544B (en) | 2019-01-07 | 2019-01-07 | Prefabricated rod manufacturing device for optical element blank and element blank manufacturing method |
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| CN109704544B true CN109704544B (en) | 2021-11-12 |
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| CN113185115B (en) * | 2021-05-18 | 2023-07-18 | 湖北菲利华石英玻璃股份有限公司 | A method and device for drawing quartz glass fiber by using a quartz glass thick rod |
| CN114890662A (en) * | 2022-05-27 | 2022-08-12 | 成都光明光电股份有限公司 | Roundness correction method and production line for optical glass rod |
| CN116023018A (en) * | 2022-12-22 | 2023-04-28 | 中建材光子科技有限公司 | Discharging control device and method for optical fiber prefabricated core rod |
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| CN100417955C (en) * | 2001-05-09 | 2008-09-10 | 浜松光子学株式会社 | Optical lens base material, optical lens, and manufacturing method of optical lens |
| CN103058504A (en) * | 2011-10-21 | 2013-04-24 | 汪国年 | Manufacturing method of glass precast body for compression molding |
| JP2015171969A (en) * | 2014-03-12 | 2015-10-01 | 日本電気硝子株式会社 | Production method of glass tube |
| CN203833818U (en) * | 2014-05-15 | 2014-09-17 | 湖北新华光信息材料有限公司 | Optical glass bar drawing machine |
| CN106082635B (en) * | 2016-08-05 | 2019-04-30 | 湖北新华光信息材料有限公司 | A kind of drawing device of optical glass bar |
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