CN102923941A - Method for tapering optical fiber preform - Google Patents

Method for tapering optical fiber preform Download PDF

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Publication number
CN102923941A
CN102923941A CN2012104985304A CN201210498530A CN102923941A CN 102923941 A CN102923941 A CN 102923941A CN 2012104985304 A CN2012104985304 A CN 2012104985304A CN 201210498530 A CN201210498530 A CN 201210498530A CN 102923941 A CN102923941 A CN 102923941A
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China
Prior art keywords
cone
optical fiber
preforms
preform
draw
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CN2012104985304A
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CN102923941B (en
Inventor
曾文哲
李拯
陈慧雄
钱新伟
付崇华
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Yangtze Optical Fibre and Cable Co Ltd
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Yangtze Optical Fibre and Cable Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
    • C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
    • C03B37/01251—Reshaping the ends
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
    • C03B37/02772—Fibres composed of different sorts of glass, e.g. glass optical fibres shaping the preform lower end or bulb, e.g. pre-gobbing, controlling draw bulb shape, or preform draw start-up procedures
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/47—Shaping the preform draw bulb before or during drawing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

The invention relates to a method for tapering an optical fiber preform. Two optical fiber preforms to be tapered are respectively and correspondingly clamped on the two ends of a glass fusing lathe, and are moved to a hearth to be preheated; the optical fiber preforms are moved until the front ends of the optical fiber preforms are close to a heat source in the hearth, and the two optical fiber preforms are in fusion welding with each other after the heating areas of the optical fiber preforms reach the softening point; the heat source is adjusted to continuously heat the fusion welding seam of the two optical fiber preforms, meanwhile, the clamps of the glass fusing lathe are dragged to move to the opposite directions for tapering, so that the front ends of the optical fiber preforms are forwards contracted so as to taper a streamline cone. The two optical fiber preforms can be tapered at the same time through primary operation, so that the production efficiency is greatly increased; the machining auxiliary materials are saved, so that the cost is lowered; the tapering glass loss of the optical fiber preform is reduced by 6% at least; and the cone shapes of the double tapering optical fiber preforms are unified, and the subsequent wire drawing process is benefited.

Description

A kind of preform draws the cone working method
Technical field
What the present invention relates to a kind of preform draws the cone working method, belongs to preform processing and manufacturing technical field.
Background technology
The production process of drawing optical fibers mainly is with the preform heating and melting and from the glass yarn of its stretched melting in lower end by fiber drawing furnace.In the drawing optical fibers process, for preform effectively is drawn into optical fiber, and reduce the glass loss amount that wire drawing is started, shorten wire drawing prefabricated rods pyrometric cone curring time, usually the prefabricated rods lower end to be pulled into the streamline cone.
In the prior art preform one end being drawn the working method of cone is the two ends that preform and glass stick are positioned over the beading lathe, by heating preform and the molten termination of glass stick are connected together, the junction of heating optical fiber preform and glass stick, then by the separation that drags of beading lathe, preform one end is pulled into the streamline cone.Such method can only draw cone to process to a preform at every turn, working (machining) efficiency is low, owing to needing to use a glass stick to draw cone as leading the primer pair preform, not only to consume glass stick, and can make preform that more glass loss amount is arranged simultaneously.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of preform to draw the cone working method for the deficiency that above-mentioned prior art exists, and not only working (machining) efficiency is high for it, and the glass loss amount of preform is few, and can save the glass bar.
The present invention is that the technical scheme that the problem of the above-mentioned proposition of solution adopts is:
Wait to draw the respectively corresponding two ends that are clamped in the beading lathe of preform that cone processes with two, the burner hearth heat source is lighted in the dead in line of two preforms, and mobile two preforms carry out preheating to burner hearth; Being preheated to optical fiber prefabricating nose temperature reaches more than 400 ℃ or 400 ℃, the moving fiber prefabricated rods makes front end near the burner hearth endogenous pyrogen, use thermal source that the front end of preform is heated, so that the preform heating region after reaching softening temperature is welding together two preforms; Adjust thermal source the welding seam crossing of two preforms is proceeded heating, drag simultaneously the chuck of beading lathe relative to oppositely moving, draw cone, the optical fiber prefabricating nose is shunk forward pull into the streamline cone, after the joint of two preforms is by drawing-down to a certain extent, close thermal source, stop mobile; In burner hearth after the naturally cooling 20 ~ 30 minutes, take off prefabricated rods from lathe after with glass cutter the joint cutting of two preforms being got off, at room temperature cool off.
Press such scheme, described preform is solid core fibres prefabricated rods, preform sleeve pipe or optical fiber prefabricated rod mandrel.
Press such scheme, the external diameter of described two preforms is identical or close.
Press such scheme, two preform weldings with draw in the cone process, two preforms are synchronous rotary in the same way.
Press such scheme, treat that the fusion splice place external diameter of two preforms drops to after about 20mm ~ 90mm, successively moving heat source adds the hot-drawn cone to the reducing place of preform respectively, the optical fiber prefabricating nose is shunk forward pull into the streamline cone.
Press such scheme, the cone cone angle of described optical fiber prefabricating nose is 10 ° ~ 80 °.
Press such scheme, described preform carries out approximately 5 ~ 15 minutes warm up time to burner hearth.
Press such scheme, be equal to or greater than 100 millimeters preform for external diameter, first it is waited to draw the cone end face to carry out outer chamfering.
Figure 891445DEST_PATH_IMAGE001
Beneficial effect of the present invention is: 1. single job can be finished simultaneously drawing of two preforms and bore processing, the production efficiency that greatly improves; 2. do not need to prepare to be specifically designed to the glass stick that preform is drawn cone, saved the processing auxiliary material, reduced cost; 3. compare with the common cone mode of drawing, bipyramid of the present invention draws, and the cone glass loss amount that draws of preform descends 6% at least; 4. bipyramid of the present invention draws and makes the taper of preform more unified, is more conducive to follow-up Wire Drawing.
Description of drawings
Fig. 1 is the process schematic diagram that the present invention draws cone processing.
Specific embodiments
Further specify the present invention below in conjunction with drawings and Examples.
Embodiment 1 draws bipyramid for external diameter 180mm solid core fibres prefabricated rods.
With two preforms corresponding two ends that are clamped in the beading lathe respectively, make the dead in line of two preforms, two preform synchronous rotaries are lighted the burner hearth heat source;
Mobile two preform leading portions carry out preheating to burner hearth 2, preheating approximately 15 minutes optical fiber prefabricating nose temperature reaches about 500 ℃;
Mobile two preforms make front end near burner hearth endogenous pyrogen 1, use thermal source that the front end end face of preform is heated;
Thermal source reaches the heating of the heating region of optical fiber prefabricating nose after the softening temperature, and two optical fiber prefabricating plane rod ends are welding together;
Adjust thermal source the welding seam crossing of two preforms is proceeded heating, drag simultaneously the chuck of beading lathe relative to oppositely moving, draw cone;
The fusion splice place external diameter for the treatment of two preforms drops to after about 60mm ~ 90mm, successively moving heat source adds the hot-drawn cone to the reducing place (intersection of the straight rod of prefabricated rods and cone) of preform respectively, the optical fiber prefabricating nose is shunk forward pull into the streamline cone, the cone cone angle is 60 °;
Close thermal source when the optical fiber prefabricating nose shrinks forward when pulling into satisfactory streamline cone, stop mobile; In burner hearth after the naturally cooling 20 ~ 30 minutes, take off prefabricated rods from lathe after with glass cutter the joint cutting of two preforms being got off, at room temperature cool off.
Embodiment 2 draws bipyramid for external diameter 80mm preform sleeve pipe.
With two preform sleeve pipes corresponding two ends that are clamped in the beading lathe respectively, make the dead in line of two preform sleeve pipes, two preform sleeve pipe synchronous rotaries are lighted the burner hearth heat source;
Mobile two preform sleeve pipe leading portions carry out preheating to burner hearth, preheating approximately 5 minutes preform sleeve pipe front end temperature reaches 450 ℃;
Mobile two preform sleeve pipes make front end near the burner hearth endogenous pyrogen, use thermal source that the front end end face of preform sleeve pipe is heated;
Thermal source reaches the heating of preform sleeve pipe heating region after the softening temperature, and two ferrule end faces are welding together;
The adjustment thermal source is proceeded heating to the fusion splice place of two preform sleeve pipes, drags simultaneously the chuck of beading lathe relative to oppositely moving, and draws cone;
The fusion splice place external diameter for the treatment of two preform sleeve pipes drops to after about 30mm, successively moving heat source adds the hot-drawn cone to the reducing place of preform sleeve pipe respectively, preform sleeve pipe front end is shunk forward pull into the streamline cone, the cone cone angle is 60 °;
When preform sleeve pipe front end shrink forward pull into satisfactory streamline cone after, close thermal source, stop mobile, in burner hearth after the naturally cooling 20 ~ 30 minutes, with glass cutter the joint cutting of two ferrules is got off to take off sleeve pipe from lathe afterwards, at room temperature cool off.
Embodiment 3 draws bipyramid for external diameter 40mm optical fiber prefabricated rod mandrel.
With two optical fiber prefabricated rod mandrels corresponding two ends that are clamped in the beading lathe respectively, make the dead in line of two optical fiber prefabricated rod mandrels, two fibre-optical mandrel synchronous rotaries are lighted the burner hearth heat source;
Mobile two fibre-optical mandrel leading portions carry out preheating to burner hearth, preheating approximately 5 minutes fibre-optical mandrel front end temperature reaches 500 ℃;
Mobile two optical fiber prefabricated rod mandrel front ends use thermal source that the front end end face of optical fiber prefabricated rod mandrel is heated near the burner hearth endogenous pyrogen;
Thermal source reaches the heating of optical fiber prefabricated rod mandrel heating region after the softening temperature, and two optical fiber prefabricated rod mandrels are welding together;
The adjustment thermal source is proceeded heating to the fusion splice place of two optical fiber prefabricated rod mandrels, drags simultaneously the chuck of beading lathe relative to oppositely moving, and draws cone;
The fusion splice place external diameter for the treatment of two optical fiber prefabricated rod mandrels drops to approximately after the 20mm, and successively moving heat source adds the hot-drawn cone to the reducing place of optical fiber prefabricated rod mandrel respectively, the fibre-optical mandrel front end is shunk forward pull into the streamline cone, and the cone cone angle is 30 °;
When the fibre-optical mandrel front end shrink forward pull into satisfactory streamline cone after, close thermal source, stop mobile, in burner hearth after the naturally cooling 20 minutes, with glass cutter the joint cutting of two optical fiber prefabricated rod mandrels is got off to take off plug from lathe afterwards, at room temperature cool off.

Claims (8)

1. a preform draws the cone working method, it is characterized in that waiting to draw the respectively corresponding two ends that are clamped in the beading lathe of preform that cone processes with two, the dead in line of two preforms, light the burner hearth heat source, mobile two preforms carry out preheating to burner hearth; Being preheated to optical fiber prefabricating nose temperature reaches more than 400 ℃ or 400 ℃, the moving fiber prefabricated rods makes front end near the burner hearth endogenous pyrogen, use thermal source that the front end of preform is heated, so that the preform heating region after reaching softening temperature is welding together two preforms; Adjust thermal source the welding seam crossing of two preforms is proceeded heating, drag simultaneously the chuck of beading lathe relative to oppositely moving, draw cone, the optical fiber prefabricating nose is shunk forward pull into the streamline cone, after the joint of two preforms is by drawing-down to a certain extent, close thermal source, stop mobile; In burner hearth after the naturally cooling 20 ~ 30 minutes, take off prefabricated rods from lathe after with glass cutter the joint cutting of two preforms being got off, at room temperature cool off.
By preform claimed in claim 1 draw the cone working method, it is characterized in that described preform is solid core fibres prefabricated rods, preform sleeve pipe or optical fiber prefabricated rod mandrel.
By claim 1 or 2 described preforms draw the cone working method, it is characterized in that the external diameter of described two preforms is identical or close.
By claim 1 or 2 described preforms draw the cone working method, it is characterized in that two preform weldings and draw in the cone process, two preforms are synchronous rotary in the same way.
5. draw the cone working method by claim 1 or 2 described preforms, it is characterized in that the fusion splice place external diameter for the treatment of two preforms drops to after about 20mm ~ 90mm, successively moving heat source adds the hot-drawn cone to the reducing place of preform respectively, the optical fiber prefabricating nose is shunk forward pull into the streamline cone.
By claim 1 or 2 described preforms draw the cone working method, the cone cone angle that it is characterized in that described optical fiber prefabricating nose is 10 ° ~ 80 °.
By claim 1 or 2 described preforms draw the cone working method, it is characterized in that described preform carries out approximately 5 ~ 15 minutes warm up time to burner hearth.
By claim 1 or 2 described preforms draw the cone working method, it is characterized in that being equal to or greater than 100 millimeters preform for external diameter, first it is waited to draw the cone end face to carry out outer chamfering.
CN201210498530.4A 2012-11-29 2012-11-29 Method for tapering optical fiber preform Active CN102923941B (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103496847A (en) * 2013-09-16 2014-01-08 江苏亨通光电股份有限公司 Method for manufacturing large-sized optical fiber preform rod guide cone
CN103708722A (en) * 2013-12-09 2014-04-09 江苏亨通光电股份有限公司 Mother rod for deposition optical fiber preform and manufacturing method thereof
CN103739193A (en) * 2013-12-16 2014-04-23 江苏亨通光电股份有限公司 Production method for optical fiber preform conical head
CN105271702A (en) * 2015-10-26 2016-01-27 江苏亨通光电股份有限公司 Tapering method for optical fiber preform
CN106365434A (en) * 2016-08-26 2017-02-01 江苏亨通光导新材料有限公司 Method for preparing optical fiber perform conical head
CN107056041A (en) * 2017-05-03 2017-08-18 江苏斯德雷特通光光纤有限公司 A kind of method that prefabricated rods draw bipyramid
CN109896737A (en) * 2019-04-17 2019-06-18 江苏通鼎光棒有限公司 A kind of efficient prick-drawing device and method for large-scale optical fiber prefabricating stick
CN112239324A (en) * 2020-10-23 2021-01-19 杭州富通通信技术股份有限公司 Method for processing preform and optical fiber
CN113998879A (en) * 2021-09-30 2022-02-01 浙江富通光纤技术有限公司 Method for manufacturing prefabricated rod and optical fiber

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01203237A (en) * 1988-02-08 1989-08-16 Furukawa Electric Co Ltd:The Production of dispersion flat-type optical fiber preform
CN1313185A (en) * 2000-03-15 2001-09-19 东南大学 Tube-type heating and drawing method for plastic optical fibre
CN101560054A (en) * 2009-05-25 2009-10-21 富通集团有限公司 Method for shaping head of optical fiber preform
CN102508335A (en) * 2011-11-11 2012-06-20 烽火通信科技股份有限公司 Optical taper type high-power coupler and manufacturing method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01203237A (en) * 1988-02-08 1989-08-16 Furukawa Electric Co Ltd:The Production of dispersion flat-type optical fiber preform
CN1313185A (en) * 2000-03-15 2001-09-19 东南大学 Tube-type heating and drawing method for plastic optical fibre
CN101560054A (en) * 2009-05-25 2009-10-21 富通集团有限公司 Method for shaping head of optical fiber preform
CN102508335A (en) * 2011-11-11 2012-06-20 烽火通信科技股份有限公司 Optical taper type high-power coupler and manufacturing method thereof

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103496847B (en) * 2013-09-16 2015-07-08 江苏亨通光电股份有限公司 Method for manufacturing large-sized optical fiber preform rod guide cone
CN103496847A (en) * 2013-09-16 2014-01-08 江苏亨通光电股份有限公司 Method for manufacturing large-sized optical fiber preform rod guide cone
CN103708722B (en) * 2013-12-09 2016-04-27 江苏亨通光电股份有限公司 A kind of Mother rod for deposition optical fiber preform and manufacture method thereof
CN103708722A (en) * 2013-12-09 2014-04-09 江苏亨通光电股份有限公司 Mother rod for deposition optical fiber preform and manufacturing method thereof
CN103739193A (en) * 2013-12-16 2014-04-23 江苏亨通光电股份有限公司 Production method for optical fiber preform conical head
CN103739193B (en) * 2013-12-16 2016-01-06 江苏亨通光电股份有限公司 A kind of production method of optical fiber preform conical head
CN105271702A (en) * 2015-10-26 2016-01-27 江苏亨通光电股份有限公司 Tapering method for optical fiber preform
CN106365434A (en) * 2016-08-26 2017-02-01 江苏亨通光导新材料有限公司 Method for preparing optical fiber perform conical head
CN106365434B (en) * 2016-08-26 2018-11-30 江苏亨通光导新材料有限公司 A kind of preparation method of optical fiber preform conical head
CN107056041A (en) * 2017-05-03 2017-08-18 江苏斯德雷特通光光纤有限公司 A kind of method that prefabricated rods draw bipyramid
CN109896737A (en) * 2019-04-17 2019-06-18 江苏通鼎光棒有限公司 A kind of efficient prick-drawing device and method for large-scale optical fiber prefabricating stick
CN112239324A (en) * 2020-10-23 2021-01-19 杭州富通通信技术股份有限公司 Method for processing preform and optical fiber
CN113998879A (en) * 2021-09-30 2022-02-01 浙江富通光纤技术有限公司 Method for manufacturing prefabricated rod and optical fiber

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