JPH0253376B2 - - Google Patents
Info
- Publication number
- JPH0253376B2 JPH0253376B2 JP11403284A JP11403284A JPH0253376B2 JP H0253376 B2 JPH0253376 B2 JP H0253376B2 JP 11403284 A JP11403284 A JP 11403284A JP 11403284 A JP11403284 A JP 11403284A JP H0253376 B2 JPH0253376 B2 JP H0253376B2
- Authority
- JP
- Japan
- Prior art keywords
- glass rod
- outer diameter
- optical fiber
- base material
- storage device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000011521 glass Substances 0.000 claims description 38
- 238000010438 heat treatment Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 13
- 239000013307 optical fiber Substances 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000005373 porous glass Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
-
- 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
- C03B37/0124—Means for reducing the diameter of rods or tubes by drawing, e.g. for preform draw-down
Landscapes
- 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)
Description
【発明の詳細な説明】
［発明の背景と目的］
本発明は光フアイバ母材の成形装置に係り、特
に、VAD法により製造された母材用ガラスロツ
ドを一定の設定外径に延伸成形する光フアイバ母
材の成形装置に関するものである。[Detailed Description of the Invention] [Background and Objectives of the Invention] The present invention relates to a forming device for an optical fiber base material, and particularly to an optical fiber forming device for forming a glass rod for the base material manufactured by the VAD method to a predetermined outer diameter. This invention relates to a fiber base material forming apparatus.
従来、VAD法（気相軸付法）により製造され
た多孔質ガラスプリフオームを加熱炉により加熱
して透明なガラスロツドとし、これを延伸して光
フアイバ母材とする方法は、人手により加熱装置
のバーナで加熱し牽引装置で延伸するもので、そ
のため手間と熟練とを要し、非常に作業能率が悪
く、しかも、常に一定の品質のものが得られない
という難点があつた。 Conventionally, a porous glass preform manufactured by the VAD method (vapor deposition method) is heated in a heating furnace to form a transparent glass rod, and this is drawn to form an optical fiber base material using a manual heating device. The process involves heating with a burner and stretching with a traction device, which requires time and skill, resulting in extremely low work efficiency and the disadvantage that products of constant quality cannot always be obtained.
そのため、第１図に示すような自動化装置によ
りガラスロツドの延伸が行われるようになつた。
図の延伸装置において、１は本体、２はガラスロ
ツド３の固定側端部のチヤツク、４は同じく移動
側端部のチヤツク、５は牽引装置、６はバーナ７
および外径測定器９を載置した台車、８は温度
計、１０は制御器である。この装置は、本体１に
ガラスロツド３を横置きにその一端をチヤツク２
により支持し、ガラスロツド３の他端部を移動可
能な牽引装置５のチヤツク４により支持する。そ
して移動可能な台車６上のバーナ７でガラスロツ
ド３を加熱する。加熱されたガラスロツド３の表
面温度を温度計８で測定し、設定温度に達した時
点で牽引装置５を右方向に移動させるとともに台
車６上の外径測定器９でガラスロツド３の延伸外
径が設定外径値になるように制御器１０により牽
引装置５の移動速度を制御しながら、ガラスロツ
ド３を光フアイバ母材に適するように延伸するも
のである。 For this reason, glass rods have come to be drawn using automated equipment as shown in FIG.
In the drawing device shown in the figure, 1 is the main body, 2 is a chuck at the fixed end of the glass rod 3, 4 is also a chuck at the movable end, 5 is a traction device, and 6 is a burner 7.
8 is a thermometer, and 10 is a controller. This device consists of a main body 1 with a glass rod 3 placed horizontally, and one end of which is connected to a chuck 2.
The other end of the glass rod 3 is supported by a chuck 4 of a movable traction device 5. The glass rod 3 is then heated by a burner 7 on a movable trolley 6. The surface temperature of the heated glass rod 3 is measured with a thermometer 8, and when the set temperature is reached, the traction device 5 is moved to the right, and the outer diameter measuring device 9 on the trolley 6 measures the stretched outer diameter of the glass rod 3. The glass rod 3 is stretched so as to be suitable for the optical fiber base material while controlling the moving speed of the pulling device 5 by the controller 10 so as to achieve a set outer diameter value.
ところが、この延伸装置によると、加熱された
ガラスロツド３の外径を測定する場合に測定誤差
が生じ易い。また、設定した延伸外径まで牽引装
置５を移動させる方法では台車６が間欠移動とな
り延伸後のガラスロツド３の外径に変動を与える
ことになる。さらに、凹凸の大きなガラスロツド
３を平滑なガラスロツドに延伸することは困難で
あるなどの問題があつた。 However, with this stretching device, measurement errors are likely to occur when measuring the outer diameter of the heated glass rod 3. Further, in the method of moving the pulling device 5 to a set stretched outer diameter, the cart 6 moves intermittently, which causes fluctuations in the outer diameter of the glass rod 3 after stretching. Furthermore, there were other problems such as difficulty in drawing the glass rod 3 having large irregularities into a smooth glass rod.
本発明の目的は、上記問題点を解決し、ガラス
ロツドを高精度で一定した延伸外径を有するよう
に成型することができる光フアイバ母材の成形装
置を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide an optical fiber base material forming apparatus that can form a glass rod with high precision and a constant stretched outer diameter.
［発明の概要］
本発明は、横置された母材用ガラスロツドに対
して、その軸線方向に沿つて移動可能な加熱装置
および外径測定器、並びに前記ガラスロツドを延
伸する牽引装置を備えた光フアイバ母材の成形装
置において、前記ガラスロツドの全長にわたりそ
の外径測定値を測定位置とともに記憶する位置セ
ンサ並びに記憶装置を設け、該記憶装置に記憶さ
れた前記外径測定値と、設定延伸外径値との偏差
量に基づいて前記加熱装置の移動速度を制御する
比較制御装置を設けてガラスロツドを延伸しその
外径を一定に成形するように構成されていること
を特徴とするものである。[Summary of the Invention] The present invention provides an optical system that includes a heating device and an outer diameter measuring device that are movable along the axial direction of a horizontally placed glass rod for a base material, and a pulling device that stretches the glass rod. A fiber base material forming apparatus is provided with a position sensor and a storage device for storing the outer diameter measurement value along the entire length of the glass rod along with the measurement position, and the outer diameter measurement value stored in the storage device and the set stretched outer diameter are provided. The present invention is characterized in that a comparison control device is provided to control the moving speed of the heating device based on the amount of deviation from the glass rod, so that the glass rod is stretched and formed to have a constant outer diameter.
［実施例］
以下、本発明の一実施例を第２図に基づいて説
明する。図において、１１は本体、１２はガラス
ロツド１３の固定側端部のチヤツク、１４は同じ
く移動側端部のチヤツク、１５は牽引装置、１６
はバーナ１７を有し移動可能な加熱装置、１８は
温度計、１９は位置センサ２０とともに台車２６
に設けられた外径測定器、２１は位置センサ２０
および外径測定器１９からの信号を記憶する記憶
装置、２２は記憶装置２１に係合し加熱装置１６
の移動速度を制御する比較制御装置であり、この
実施例が第１図に示す従来のものと異るところ
は、ガラスロツド１３の全長にわたりその外径測
定値を測定位置とともに記憶する位置センサ２０
および記憶装置２１を設け、記憶装置２１に記憶
された外径測定値と、母材とするために設定した
延伸外径値との偏差量に基づいて加熱装置１６の
移動速度を制御する比較制御装置２２を設けてガ
ラスロツド１３を延伸しその外径を一定に成形す
るように構成されている点である。すなわちこの
実施例では、ガラスロツド１３は本体１１のチヤ
ツク１２と１４とに支持されている。加熱装置１
６はモータによりガラスロツド１３に沿つてその
全長にわたり往復移動ができる。また、外径測定
器１９と位置センサ２０とは台車２６上に設けら
れ、加熱装置１６と同様にガラスロツド１３に沿
つてその全長にわたり往復移動ができる。牽引装
置１５は一定速度でガラスロツド１３の延伸方向
に移動できる。この装置の操作にあたり、まず台
車２６は、ガラスロツド１３の一端のチヤツク１
２の位置からチヤツク１４の位置までガラスロツ
ド１３の全長にわたり移動しながら、外径測定器
１９並びに位置センサ２０により外径と位置とを
測定し、その値を記憶装置２１に記憶させる。次
に加熱装置１６をガラスロツド１３の一端でチヤ
ツク１２の場所に位置させ、バーナ１７に点火す
る。加熱条件のO2、H2の量は予め実験によつて
求められており、延伸可能な温度になつて、牽引
装置１５が移動を開始する。そして加熱装置１６
の移動速度は、記憶装置２１に記憶されている外
径測定値と設定延伸外径値とを比較制御装置２２
で比較し、その偏差量に基づいて移動速度を制御
する。この場合、ガラスロツド１３の偏差量の大
きい部分では、加熱装置１６の移動速度を遅く
し、逆に、偏差量が小さい部分では速度を早くし
て延伸後のガラスロツド１３の外径を一定にする
ことができる。[Example] Hereinafter, an example of the present invention will be described based on FIG. 2. In the figure, 11 is the main body, 12 is a chuck at the fixed end of the glass rod 13, 14 is also a chuck at the movable end, 15 is a traction device, and 16
is a movable heating device having a burner 17; 18 is a thermometer; 19 is a position sensor 20 and a cart 26;
21 is a position sensor 20
and a storage device 22 for storing signals from the outer diameter measuring device 19, which is engaged with the storage device 21 and is connected to the heating device 16.
The difference between this embodiment and the conventional one shown in FIG.
and a storage device 21, and a comparison control for controlling the moving speed of the heating device 16 based on the amount of deviation between the outer diameter measurement value stored in the storage device 21 and the stretched outer diameter value set for the base material. The point is that a device 22 is provided to stretch the glass rod 13 and shape it to a constant outer diameter. That is, in this embodiment the glass rod 13 is supported on the chucks 12 and 14 of the body 11. Heating device 1
6 can be moved back and forth along the entire length of the glass rod 13 by a motor. Further, the outer diameter measuring device 19 and the position sensor 20 are provided on a trolley 26, and like the heating device 16, they can be reciprocated along the entire length of the glass rod 13. The traction device 15 can be moved at a constant speed in the direction of extension of the glass rod 13. To operate this device, first the cart 26 is attached to the chuck 1 at one end of the glass rod 13.
While moving over the entire length of the glass rod 13 from the position 2 to the chuck 14 position, the outer diameter and position are measured by the outer diameter measuring device 19 and the position sensor 20, and the values are stored in the storage device 21. The heating device 16 is then placed at one end of the glass rod 13 in place of the chuck 12 and the burner 17 is ignited. The amounts of O 2 and H 2 used in the heating conditions are determined in advance through experiments, and the traction device 15 starts moving when the temperature reaches a temperature that allows stretching. and heating device 16
The moving speed is determined by comparing the measured outer diameter value stored in the storage device 21 with the set stretched outer diameter value.
The moving speed is controlled based on the amount of deviation. In this case, the moving speed of the heating device 16 is slowed down in areas where the deviation amount of the glass rod 13 is large, and conversely, the speed is increased in areas where the deviation amount is small to keep the outer diameter of the glass rod 13 constant after stretching. Can be done.
［発明の効果］
以上説明したように、本発明によれば、母材用
ガラスロツドを高精度で一定した延伸外径を有す
る光フアイバ母材とすることができ、この母材に
よれば性能のすぐれた光フアイバを製造すること
が容易になるという工業的効果を奏することがで
きる。[Effects of the Invention] As explained above, according to the present invention, the glass rod for the base material can be made into an optical fiber base material having a highly precise and constant drawn outer diameter, and this base material has improved performance. It is possible to produce an industrial effect that it becomes easy to manufacture an excellent optical fiber.
第１図は従来の光フアイバ母材製造装置の全体
図、第２図は本発明の一実施例の光フアイバ母材
製造装置の全体図である。
１，１１；本体、３，１３；ガラスロツド、
５，１５；牽引装置、７，１７；バーナ、１６；
加熱装置、１９；外径測定器、２０；位置セン
サ、２１；記憶装置、２２；比較制御装置。
FIG. 1 is an overall view of a conventional optical fiber preform manufacturing apparatus, and FIG. 2 is an overall view of an optical fiber preform manufacturing apparatus according to an embodiment of the present invention. 1, 11; Main body, 3, 13; Glass rod,
5, 15; Traction device, 7, 17; Burner, 16;
Heating device, 19; Outer diameter measuring device, 20; Position sensor, 21; Storage device, 22; Comparison control device.
Claims (1)
の軸線方向に沿つて移動可能な加熱装置および外
径測定器、並びに前記ガラスロツドを延伸する牽
引装置を備えた光フアイバ母材の成形装置におい
て、前記ガラスロツドの全長にわたりその外径測
定値を測定位置とともに記憶する位置センサ並び
に記憶装置を設け、該記憶装置に記憶された前記
外径測定値と、設定延伸外径値との偏差量に基づ
いて前記加熱装置の移動速度を制御する比較制御
装置を設けてガラスロツドを延伸し、その外径を
一定に成形するように構成されていることを特徴
とする光フアイバ母材の成形装置。1. An optical fiber preform forming apparatus that is equipped with a heating device and an outer diameter measuring device that are movable along the axial direction of a horizontally placed glass rod for the preform, and a traction device that stretches the glass rod, A position sensor and a storage device are provided for storing the measured outer diameter value along the entire length of the glass rod along with the measurement position, and based on the amount of deviation between the measured outer diameter value stored in the storage device and the set stretched outer diameter value. 1. An apparatus for forming an optical fiber base material, characterized in that a comparison control device for controlling the moving speed of the heating device is provided to draw the glass rod and form the glass rod to a constant outer diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11403284A JPS60260439A (en) | 1984-06-04 | 1984-06-04 | Forming device of parent material for optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11403284A JPS60260439A (en) | 1984-06-04 | 1984-06-04 | Forming device of parent material for optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60260439A JPS60260439A (en) | 1985-12-23 |
| JPH0253376B2 true JPH0253376B2 (en) | 1990-11-16 |
Family
ID=14627321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11403284A Granted JPS60260439A (en) | 1984-06-04 | 1984-06-04 | Forming device of parent material for optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60260439A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2657864B1 (en) * | 1990-02-02 | 1992-04-10 | Alsthom Cge Alcatel | PROCESS FOR MANUFACTURING PREFORMS FOR OPTICAL FIBERS WITH REGULAR CHARACTERISTICS. |
| DE19513862C2 (en) * | 1995-04-12 | 1997-12-18 | Alcatel Kabel Ag | Method and device for fire polishing an elongated glass body |
| DE19629169C1 (en) * | 1996-07-19 | 1997-12-11 | Heraeus Quarzglas | Method and device for producing a cylindrical component made of glass |
| US5868815A (en) * | 1997-02-20 | 1999-02-09 | Lucent Technologies Inc. | Method of making an optical fiber by blowing on a preform tube to enhance collapse |
| US6460379B2 (en) * | 1999-10-25 | 2002-10-08 | Fitel Usa Corp. | MCVD apparatus having two opposing motors to eliminate backlash in burner motion |
| CN105236731A (en) * | 2015-09-18 | 2016-01-13 | 长飞光纤光缆股份有限公司 | Melt collapsing and stretching technology of optical fiber preform core rod |
-
1984
- 1984-06-04 JP JP11403284A patent/JPS60260439A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60260439A (en) | 1985-12-23 |
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