CN101893734B - Manufacturing method of large-size fiber optic faceplate - Google Patents
Manufacturing method of large-size fiber optic faceplate Download PDFInfo
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- CN101893734B CN101893734B CN201010238439XA CN201010238439A CN101893734B CN 101893734 B CN101893734 B CN 101893734B CN 201010238439X A CN201010238439X A CN 201010238439XA CN 201010238439 A CN201010238439 A CN 201010238439A CN 101893734 B CN101893734 B CN 101893734B
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Abstract
The invention relates to a preparation method of a large-size fiber optic faceplate. In order to reduce temperature difference of the large-size fiber optic faceplate when melt press is carried out, the invention provides a manufacturing method of a large-size fiber optic faceplate. The large-size fiber optic faceplate is prepared by that composite filament is carried out with the following processing steps of plate arrangement, melt press, cutting and finish machining. In the melt process, temperature rises to 615-625 DEG C after 3-5 hours from room temperature; after being kept at 615-625 DEG C for 2-4 h, temperature rises to 715-725 DEG C by heating for 8h; at 715-725 DEG C, pressure rises to 80 tons at constant speed within one hour, and depressurization and cooling are carried out; during cooling, cooling rate is 15 DEG C/h when temperature is more than 620 DEG C, and temperature of 620 DEG C is kept for 5-8 hours; and when temperature is less than 620 DEG C, cooling rate is 10 DEG C/h. In the invention, a program is adopted to rise temperature and cool to lower temperature difference in the melt press process fiber optic faceplate blank and ensure the quality of the large-size fiber optic faceplate.
Description
Technical field
The present invention relates to the method for making of fibre faceplate.
Background technology
Fibre faceplate is by a kind of rigid fiber optic component of the many compact arranged optical fibers of rule through operation machine-shapings such as row's plate, fusion pressure, check, cutting, finishing, it is good that it has the light harvesting performance, the resolution height, optically has zero thickness, can transmit characteristics such as high-definition image undistortedly, be widely used in input, the cutout screen of various electro-optical devices.Large-sized fibre faceplate is the Primary Component that is used for making big visual field low-light level imaging device.At present, physics and medical domain aspect all propose as seen the sightless X ray of naked eyes, charged particle, energy neutron etc. are converted to, even its space distribution carried out imaging, and imaging viewing field requires constantly to enlarge, and makes large-sized fibre faceplate obtain important use on detection instrument and Medical Devices.
The manufacture difficulty of comparing large-size fiber optic faceplate with the small size fibre faceplate strengthens, and operation, frock, equipment etc. all need be done corresponding improvement or redesign to make large-size fiber optic faceplate.The key of making large-size fiber optic faceplate is operations such as the fusion pressure of blank, cold working.Wherein fusion pressure is the critical process that blank is made, and blank quality directly influences the end product quality of optical fibre device.
In the fusion pressure process, the fusion pressure mould that assembling is finished is put into the hot pressing burner hearth burner hearth is found time, and is beneficial to the fusion pressure between the silk, simultaneously blank is evenly heated, and this has a flat-temperature zone that satisfies big plate with regard to the cavity that requires burner hearth.There is the temperature difference in the temperature of normal reheating furnace along the short transverse of burner hearth, the temperature of lower furnace portion is higher than the upper furnace temperature, when making large-size fiber optic faceplate, along with the increasing of plate face, the height of plate also can increase, and causes big plate also can have tangible upper and lower temperature difference in the fusion pressure process.On the other hand, the ascending, descending of furnace temp all is by carrying out than speed faster in traditional fibre faceplate method for making, such heating-cooling program can cause the center and the peripheral excessive temperature differentials of fibre faceplate, if when large-size fiber optic faceplate is made, still adopt this method can cause the silk of core but can not fine fusion and the core skin diffusion of peripheral silk, be the quality that the upper and lower temperature difference that produces on fibre faceplate or the center edge temperature difference all can have a strong impact on fibre faceplate.
Summary of the invention
The temperature difference when reducing the large-size fiber optic faceplate fusion pressure the invention provides a kind of method for making of large-size fiber optic faceplate.
Overcome the above problems, the technical solution used in the present invention is: a kind of method for making of large-size fiber optic faceplate, make through comprising row's plate, fusion pressure, cutting and accurately machined processing step by composite filament, in the fusion pressure process, during intensification, be warming up to 615 ℃～625 ℃ through 3～5h from room temperature, behind 615 ℃～625 ℃ insulation 2～4h, be warming up to 715 ℃～725 ℃ through 8h again, in the time of 715 ℃～725 ℃, in 1h, at the uniform velocity add to 80 tons of pressure after heat-insulation pressure keeping 1h, begin the step-down cooling then; During cooling, during temperature＞620 ℃, rate of temperature fall is 15 ℃/h, insulation 5～8 hours in the time of 620 ℃ then, and during temperature＜620 ℃, rate of temperature fall is 10 ℃/h.
Row's plate, fusion pressure, cutting and finishing all can be finished by known technology and production equipment.Composite filament is by core material, the skin-deep monofilament of joining of core draws and forms, this core assembly, the softening point of skin batching cladding is near 620 ℃, the softening point of core material is near 720 ℃, the present invention slows down intensification and cooling process, also pressure is slowly increased during the constant temperature compacting, rise, the rate controlled of cooling is that the thermal property according to composite filament obtains through testing repeatedly, through liter of the present invention, the center edge temperature difference that cooling process can be controlled the fibre faceplate blank is in 5 ℃, has prevented that effectively central hair from not merging, and the phenomenon of peripheral silk core skin diffusion takes place.
For reducing the upper and lower temperature difference in the heating furnace, thermograde on the heating furnace short transverse during according to fusion pressure is adjusted the density of heating furnace silk, increase stove silk density in the low position of temperature, reduce stove silk density in the high position of temperature, thereby changed the thermograde of burner hearth.And can improve the heat-insulating property of heat-insulation layer, in order to energy efficient by reselecting insulation material.
Compared with prior art, the method for making of large-size fiber optic faceplate of the present invention, heating-cooling of employing program and furnace temp VG (vertical gradient) are adjusted, reduce the center edge temperature difference and upper and lower temperature difference in the fibre faceplate blank fusion pressure process effectively, guaranteed the quality of large-size fiber optic faceplate.
Description of drawings
Fig. 1 is excellent synoptic diagram for the present invention arranges.
Fig. 2, Fig. 3 arrange the plate synoptic diagram for the present invention.
Fig. 4, Fig. 5 synoptic diagram during for fusion pressure of the present invention.
Among the figure, 1-arranges excellent patrix; 2-arranges excellent counterdie; The 3-counterdie; The 4-patrix; 5-arranges plate; The 6-gland; The 7-baffle plate; The 8-side slat; The 9-sprue; The 10-lock sleeve; The 11-heating furnace; The 12-base plate.
Embodiment
It below is specific implementation method of the present invention.In the actual production, work out technological parameter and realize the frock size etc. of this technological parameter according to the concrete condition of finished product.
(1) row's plate
According to finished silk footpath requirement, determine single, multifilament specification, and arrange excellent mould by the multifilament that this specification is chosen or made correspondingly.Referring to Fig. 1, in row's rod mould of the regular hexagon cavity structure that forms by the excellent patrix 1 of row, the excellent counterdie 2 of row, monofilament closely is arranged in the regular hexagon structure, insert the absorption silk between the monofilament and form compound bar.The compound bar colligation is firm, on wire drawing machine, adjust technological parameters such as fiber drawing furnace temperature, delivery speed and drawing speed, make compound bar by drawing the composite filament that becomes required specification by certain no-load voltage ratio.This specification composite filament can be arranged in once more compound bar if necessary draws to reach finished silk footpath requirement.The composite filament that will meet silk footpath specification is broken into fixed length according to the length of fusion pressure mould.Referring to Fig. 2 and Fig. 3, the body of fusion pressure mould comprises the upper and lower V-shaped groove that notch is relative, described V-shaped groove down is a counterdie 3, last V-shaped groove is patrix 4 or row's plate 5, patrix 4 tops are placed with gland 6, the left and right sides lateral surface of upper and lower V-shaped groove is provided with baffle plate 7, baffle plate 7 bottoms are fixed with following V-shaped groove, upper and lower V-shaped groove inside each side is provided with a vertical side slat 8 that contacts with upper and lower V-shaped groove, upper and lower two V-shaped grooves and two side slats 8 form a hexagon cavity, also are provided with sprue 9 at die ontology two openends.Sprue 9 is placed on the base plate 12, and the outside of die ontology and two sprues 9 is with lock sleeve 10.
Consider that process redundancy and fusion pressure amount of contraction adjustment fusion pressure mould side slat 8 arrives appropriate position so that the cavity size of mould can satisfy the blank dimension requirement of moulding, the row's of placement plate 5, this moment, each limit of hexagon cavity must be the whole radical of composite filament.The fixed length composite filament is discharged in the mould in an orderly manner, requires to give much attention to the correctness of this arrangement position of silk in the alignment processes.After arranging the body of having one's bosom filled with, form fiber facet chaeta base to composite filament.Scrutiny row silk situation is checked errorless.Referring to Fig. 3, Fig. 4, earlier on composite filament, place patrix, the row's of unloading plate is lifted the fusion pressure die ontology in base plate and the sprue 9 more simultaneously, and push-tight sprue 9 is placed lock sleeve 10, and the mould that assembling is finished is put into heating furnace and is carried out fusion pressure.What the present invention used is large-scale optical fiber product blank pressure mould, and row's plate, the fusion pressure of base substrate are all finished in this mould.This mould adopts resistant to elevated temperatures material, and the plug place is provided with lock sleeve, has improved the structural strength of mould, has reduced the distortion of mould, improves the serviceable life of mould, thereby has improved the internal soundness of blank.
(2) fusion pressure
As shown in Figure 5, fusion pressure is that the mould that assembling is finished is put into heating furnace 11, by the program that is fit to find time, temperature control, pressurization.
In the fusion pressure process, heating furnace 11 adopts the program heating-cooling, during intensification, be warming up to 615 ℃～625 ℃ from room temperature through 3～5h, behind 615 ℃～625 ℃ insulation 2～4h, be warming up to 715 ℃～725 ℃ through 8h again, in the time of 715 ℃～725 ℃, in 1h, at the uniform velocity add to 80 tons of pressure after heat-insulation pressure keeping 1h, begin the step-down cooling then; During cooling, when temperature＞620 ℃, rate of temperature fall is 15 ℃/h, insulation 5～8 hours in the time of 620 ℃ then, and during temperature＜620 ℃, rate of temperature fall is 10 ℃/h.
Thermograde on the heating furnace short transverse during according to fusion pressure is adjusted the density of heating furnace silk, increases stove silk density in the low position of temperature, reduces stove silk density in the high position of temperature, has changed the thermograde of burner hearth.And reselect insulation material, improve the heat-insulating property of heat-insulation layer, in order to energy efficient.
In a word, no matter the plate face all can not have the too big temperature difference in short transverse and center edge, and its temperature approach is controlled at 5 ℃ with the interior fusion pressure of finishing blank.
(3) cutting
The blank of check behind the fusion pressure adjusted the position of special-purpose location backup plate on the bedstead that grinds multi-cutting machine, qualified blank is accurately located and fixing.Consider that by large-size fiber optic faceplate finished size H the machining precision of each operation and process redundancy △ h extrapolate the blank cut lengths.By the interval between this adjusted size multitool, immovable support, reciprocating frequence, the amount of feeding of adjustment lathe cutter saddle, each parameters such as abrasive grain, flow begin to cut blank.Through about ten hours, cut and finish, take off blank, clean, check from lathe.
(4) finishing
Check the semi-manufacture of cutting, qualified semi-manufacture are carried out the qualified finished product that is processed into of finishing steps such as external form processing, mill, throwing, image displacement correction according to assay.Finishing also is the critical process of processing and forming, and the precision of its processing etc. has guaranteed the final mass of finished product.
Determined the overall dimensions of large-scale optical fiber product, silk footpath as can be known as long as to sum up state example, and aligning method all can be determined row's rod, the die size of row's plate and the scope of application of mould by calculating.The technology of adjusting fusion pressure parameter and cut lengths and each finishing step according to the technical parameter of product just can be produced and satisfy large-scale optical fiber product requirement certified products again.The according to said method present large-size fiber optic faceplate of having produced φ 160mm, the special-purpose row of employing, pressing mold tool are arranged, are pressed, and have overcome mould row, pressure separation in the past, the shift defect when mobile between the silk; Carry out fusion pressure with special-purpose burner hearth, overcome that the burner hearth cavity size was little in the past, and weakness such as upper and lower temperature difference is big; With special-purpose main equipment processing, finally improved the quality of product.
Claims (2)
1. the method for making of a large-size fiber optic faceplate, monofilament closely is arranged in the regular hexagon structure, insert between the monofilament and absorb silk formation compound bar, the compound bar colligation is firm, on wire drawing machine, the adjusting process parameter, make compound bar become the composite filament of required specification by drawing, comprise row's plate by the composite filament process, fusion pressure, cutting and accurately machined processing step are made, it is characterized in that: in the fusion pressure process, during intensification, be warming up to 615 ℃～625 ℃ from room temperature through 3～5h, behind 615 ℃～625 ℃ insulation 2～4h, be warming up to 715 ℃～725 ℃ through 8h again, heat-insulation pressure keeping 1h at the uniform velocity add to 80 tons of pressure in 1h in the time of 715 ℃～725 ℃ after begins the step-down cooling then; During cooling, during temperature＞620 ℃, rate of temperature fall is 15 ℃/h, insulation 5～8 hours in the time of 620 ℃ then, and during temperature＜620 ℃, rate of temperature fall is 10 ℃/h.
2. the method for making of large-size fiber optic faceplate according to claim 1, it is characterized in that: the thermograde on the heating furnace short transverse during according to fusion pressure is adjusted the density of heating furnace silk, increase stove silk density in the low position of temperature, the position that temperature is high reduces stove silk density.
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| CN201010238439XA CN101893734B (en) | 2010-07-28 | 2010-07-28 | Manufacturing method of large-size fiber optic faceplate |
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| CN201010238439XA CN101893734B (en) | 2010-07-28 | 2010-07-28 | Manufacturing method of large-size fiber optic faceplate |
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| CN101893734B true CN101893734B (en) | 2011-12-28 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529512A (en) * | 2013-10-21 | 2014-01-22 | 中国建筑材料科学研究总院 | Method for manufacturing square-filament optical fiber panel |
| CN105259611B (en) * | 2015-09-10 | 2018-08-28 | 广州宏晟光电科技股份有限公司 | A kind of production method of fingerprint collecting fibre faceplate |
| CN105807366B (en) * | 2016-02-23 | 2019-04-23 | 广州宏晟光电科技股份有限公司 | A kind of large area fibre faceplate compacting tool set and production method |
| CN109725383A (en) * | 2019-01-28 | 2019-05-07 | 广州宏晟光电科技股份有限公司 | A kind of method and its fusion pressure furnace for making large-size fiber optic faceplate |
| CN110286438B (en) * | 2019-07-26 | 2024-03-08 | 吉林大学 | Automatic optical fiber board arrangement equipment |
| CN111018341B (en) * | 2019-12-24 | 2022-10-25 | 中国建筑材料科学研究总院有限公司 | Method and device for preparing fiber bundle blank plate |
| CN111453985A (en) * | 2020-05-22 | 2020-07-28 | 中建材光芯科技有限公司 | rectangular O L ENS forming die for fingerprint under screen |
| CN112062463B (en) * | 2020-09-29 | 2022-09-20 | 山西能源学院 | Preparation method of glass micropore array for liquid flash |
| CN112764157A (en) * | 2021-02-02 | 2021-05-07 | 上海钜晶精密仪器制造有限公司 | Automatic intelligent melt-compression molding device based on remote control technology |
| CN114605068B (en) * | 2022-02-11 | 2024-01-05 | 广州宏晟光电科技股份有限公司 | Preparation method of optical fiber panel blank |
| CN114605067B (en) * | 2022-02-11 | 2024-03-12 | 广州宏晟光电科技股份有限公司 | Fusion pressing die for optical fiber panel blank and use method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6487351B1 (en) * | 2000-11-06 | 2002-11-26 | Schott Fiber Optics | Fiber optic faceplate |
| CN100351657C (en) * | 2005-12-29 | 2007-11-28 | 广州光导纤维厂 | Production method of small section flexible optical fibre bundle for transmitting image using acid soluble method |
| CN101493545A (en) * | 2008-01-25 | 2009-07-29 | 中国科学院西安光学精密机械研究所 | Microstructure optical fiber panel and application thereof in imaging technique |
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