JPH01278908A - Manufacture of stepped small diameter tube - Google Patents
Manufacture of stepped small diameter tubeInfo
- Publication number
- JPH01278908A JPH01278908A JP10693888A JP10693888A JPH01278908A JP H01278908 A JPH01278908 A JP H01278908A JP 10693888 A JP10693888 A JP 10693888A JP 10693888 A JP10693888 A JP 10693888A JP H01278908 A JPH01278908 A JP H01278908A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- diameter
- metal tube
- jigs
- stepped
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 229910052751 metal Inorganic materials 0.000 claims abstract description 49
- 239000002184 metal Substances 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 2
- 239000013307 optical fiber Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 229910000833 kovar Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- 241001122767 Theaceae Species 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は段付細径管の製造方法に関し、特に、作業の簡
略化、工程数の削減およびコストダウンを図った段付細
径管の製造方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a stepped small-diameter tube, and in particular, to a method for manufacturing a stepped small-diameter tube that simplifies work, reduces the number of steps, and reduces costs. Regarding the manufacturing method.
段付細径管は主に、レーザダイオードユニットにおいて
、通信用のレーザダイオードと光結合するグラスファイ
バーの端部を支持するために使用される。このレーザダ
イオードユニットの概略構造を第４図に示す、これは金
属製ケース２を有し、その固定部２ａにはレーザダイオ
ード１が固定されており、金属製ケース２の側壁に硬ろ
う付等によって固定された段付細径管４が光信号伝送用
の光ファイバ３をガイドするようになっている。段付細
径管４の後方から挿入された光ファイバ３は、大径部４
ｂの内部終端において保護シース５が剥離されており、
大径部４ｂと光ファイバ３の隙間には樹脂６が充填され
ている。The stepped narrow diameter tube is primarily used in laser diode units to support the end of a glass fiber that is optically coupled to a laser diode for communication. The schematic structure of this laser diode unit is shown in FIG. 4. It has a metal case 2, the laser diode 1 is fixed to its fixing part 2a, and the side wall of the metal case 2 is attached with hard soldering etc. A stepped narrow-diameter tube 4 fixed by a guide member guides an optical fiber 3 for transmitting optical signals. The optical fiber 3 inserted from the rear of the stepped small diameter tube 4 is connected to the large diameter section 4.
The protective sheath 5 is peeled off at the inner end of b,
The gap between the large diameter portion 4b and the optical fiber 3 is filled with resin 6.
剥離された光ファイバ３は細径部４ｂを通過して先端部
から突出しており、先端部と光ファイバ３の隙間をはん
だ７によって封止している。この突出した光ファイバ３
はレーザダイオード１の光出力部に配設され、レーザダ
イオード１が発光した光を受光する。また、金属製ケー
ス２は溶接等によって蓋８が取り付けられており、内部
が密閉されている。The separated optical fiber 3 passes through the narrow diameter portion 4b and protrudes from the tip, and the gap between the tip and the optical fiber 3 is sealed with solder 7. This protruding optical fiber 3
is arranged at the light output part of the laser diode 1 and receives the light emitted by the laser diode 1. Further, a lid 8 is attached to the metal case 2 by welding or the like, and the inside is hermetically sealed.
このような光通信用レーザダイオードユニットには単一
モード光ファイバが使用され、その標準外径はシースの
部分で０．９ ｔｅａ、光フアイバ自体の外径は０．１
２５ ｔｒｔｒｓと極めて細いものである。従って、第
５図に示すような大径部４ａの内径が１ｍｍ、細径部４
ｂの内径が０、１５ａｍ程度の段付細径管４が必要とな
る。しかも細径部４ｂの軸方向の長さｌは数ｎ（例えば
、４ｍｍ）と径に比べて大きい値が必要とされる。この
段付細径管４の材質は一般に光ファイバとの整合性の点
からコバール等の難加工材が使用されることもあって一
体加工品として加工するのが困難であり、たとえ加工し
たとしても微細加工のため、コストアップになるという
欠点があった。A single mode optical fiber is used in such a laser diode unit for optical communication, and its standard outer diameter is 0.9 tea at the sheath part, and the outer diameter of the optical fiber itself is 0.1
It is extremely thin at 25 trtrs. Therefore, as shown in FIG. 5, the inner diameter of the large diameter part 4a is 1 mm, and
A stepped narrow diameter tube 4 with an inner diameter of about 0.15 am is required. Furthermore, the axial length l of the narrow diameter portion 4b is required to be several n (for example, 4 mm), which is a large value compared to the diameter. The material of this stepped narrow diameter tube 4 is generally a difficult-to-process material such as Kovar from the point of view of compatibility with the optical fiber, so it is difficult to process it as an integral product. However, since it is microfabricated, it has the disadvantage of increasing costs.
そこで、第６図に示すような大径管９の内部に細径管１
０を嵌め込み、界面に硬ろう付等を施すことにより組立
てる方法が取られている。Therefore, a small diameter pipe 1 is placed inside the large diameter pipe 9 as shown in FIG.
0 is fitted and the interface is hard brazed or the like.
しかし、従来の段付細径管の製造方法によると、細径管
および大径管を個別に製造し、細径管を大径管に挿入し
、ろう付等によって一体にして組立てるため、工程数の
増加およびコストアップになるという不都合がある。However, according to the conventional manufacturing method of stepped small-diameter tubes, the small-diameter tube and large-diameter tube are manufactured separately, the small-diameter tube is inserted into the large-diameter tube, and they are assembled together by brazing, etc. This has the disadvantage of increasing the number and cost.
また、ろう材の量のコントロールが難しく、ろう材が回
り込んで穴を塞ぐ恐れがある。Additionally, it is difficult to control the amount of brazing filler metal, and there is a risk that the filler metal may wrap around and block the hole.
従って、本発明の目的は作業の簡素化、工程の削減およ
びコストダウンを図った段付細径管の製造方法を提供す
ることである。Accordingly, an object of the present invention is to provide a method for manufacturing a stepped narrow diameter tube that simplifies operations, reduces steps, and reduces costs.
本発明は以上述べた目的を実現するため、導電性を有す
るクランプ治具によって金属管の両端を挟持し、両クラ
ンプ治具間に所定の電圧を印加することによって金属管
を通電加熱し、クランプ治具の一方を所定の方向に移動
させて金属管を引き伸ばすようにした段付細径管の製造
方法を提供するものである。In order to achieve the above-mentioned objects, the present invention clamps both ends of a metal tube with conductive clamp jigs, applies a predetermined voltage between both clamp jigs, heats the metal tube with electricity, and clamps the metal tube. The present invention provides a method for manufacturing a stepped narrow diameter tube in which a metal tube is stretched by moving one of the jigs in a predetermined direction.
即ち、本発明は、金属管の両端を導電性の治具によって
上下から挟持する工程と、前記治具間に所定の電圧を印
加し、前記金属管に通電して加熱する工程と、
前記治具の一方を所定の方向に移動させ、前記加熱した
金属管を引き伸ばして中央部の径を縮小させる工程と、
前記中央部の径が縮小した金属管を所定の位置で切断し
て段付細径管を製造する工程とを有し、必要に応じて金
属管の中央部の径を縮小する際に金属管の熱膨張係数よ
り大きい中子を挿入して前記金属管を引き伸ばす工程を
付加しても良い。これによって金属管を引き伸ばす際に
中央部の内径が中子の外径によって所定のサイズに規制
され、かつ、金属管の熱膨張係数より大きい材質の中子
を使用することによってその抜去も容易となる。このよ
うに、容易な製造方法で微細な段付細径管を製造するこ
とができ、レーザダイオードユニットのガイド用として
使用することができる。That is, the present invention includes a step of sandwiching both ends of a metal tube from above and below with conductive jigs, a step of applying a predetermined voltage between the jigs and heating the metal tube by applying electricity, and a step of heating the metal tube by applying a predetermined voltage between the jigs. a step of moving one of the tools in a predetermined direction and stretching the heated metal tube to reduce the diameter of the center portion; and cutting the metal tube with the reduced diameter of the center portion at a predetermined position to form a stepped thin tube. A process of manufacturing a diameter pipe, and an additional step of stretching the metal pipe by inserting a core having a coefficient of thermal expansion greater than the coefficient of thermal expansion of the metal pipe when reducing the diameter of the central part of the metal pipe as necessary. It's okay. As a result, when stretching the metal tube, the inner diameter of the center part is regulated to a specified size by the outer diameter of the core, and by using a core made of a material with a larger coefficient of thermal expansion than the metal tube, it can be easily removed. Become. In this way, a fine stepped small-diameter tube can be manufactured by an easy manufacturing method, and can be used as a guide for a laser diode unit.
以下、本発明の段付細径管の製造方法を詳細に説明する
。Hereinafter, the method for manufacturing the stepped small diameter tube of the present invention will be explained in detail.
第１図は本発明の一実施例を示し、金属管１１の一端は
軸方向に移動しないクランプ治具１２によって挟持され
、他端は油圧シリンダ１３によって軸方向に移動するク
ランプ治具１４によって挟持されている。このクランプ
治具１２、１４は上側治具１２ａ、ｌｊａと、下側治具
１２ｂ、１４ｂによって構成され、その押圧力は金属管
１１の断面形状が変化せず、かつ、クランプ治具１４が
移動してもクランプ治具１２．１４から金属管１１が外
れない程度に調整しである。また、クランプ治具１２．
１４は導電性材質から成り、電源装置１５からケーブル
１６を介して印加される電圧を金属管１１に印加するた
めの電極を兼ねている。このクランプ治具１２．１４間
に電圧が印加すると、金属管１１を通電加熱することが
できる。この加熱手段としてはバーナー等を用いても可
能であるが、温度制御や加熱の均一性の点から通電加熱
が好ましい。FIG. 1 shows an embodiment of the present invention, in which one end of a metal tube 11 is clamped by a clamp jig 12 that does not move in the axial direction, and the other end is clamped by a clamp jig 14 that moves in the axial direction by a hydraulic cylinder 13. has been done. The clamping jigs 12 and 14 are composed of upper jigs 12a and lja and lower jigs 12b and 14b, and the pressing force is applied so that the cross-sectional shape of the metal tube 11 does not change and the clamping jigs 14 move. The adjustment should be made to such an extent that the metal tube 11 will not come off from the clamp jig 12, 14 even if the metal tube 11 is removed. Additionally, the clamp jig 12.
Reference numeral 14 is made of a conductive material and also serves as an electrode for applying a voltage to the metal tube 11 from the power supply device 15 via the cable 16 . When a voltage is applied between the clamping jigs 12 and 14, the metal tube 11 can be electrically heated. Although it is possible to use a burner or the like as the heating means, electrical heating is preferable from the viewpoint of temperature control and uniformity of heating.
以下、本発明の段付細径管の製造方法を説明する。Hereinafter, a method for manufacturing a stepped small-diameter tube according to the present invention will be explained.
まず、クランプ治具１２．１４の下側治具１２ｂ、１４
ｂ上にコバールパイプ等の金属管１１を載置し、クラン
プ治具１２．１４の上側治具１２ａ、１４ａを降下させ
、金属管１１０両端部を両クランプ治具１２．１４によ
って挟持する。この後、電源装置１５から所定の電力を
ケーブル托を介して両クランプ治具１２．１４に供給し
て両クランプ治具１２．１４間に所定の電圧を印加して
金属管１１を通電加熱する。このとき、油圧シリンダ１
３によってクランプ治具Ｌ４を矢印の方向に移動させる
と、金属管１１は引き伸ばされ、かつ、引張矯正効果に
よって金属管１１の中央部１１ａ（第２図）が直進性を
保ちながら縮径する。所定のサイズに縮径した後、上側
治具１２ａ、１４ａを上昇させ、載置された金属管１１
を取り出すと、第２図に示すような、中央部１１ａの径
が縮小された金属管１１となり、中央部１１ａの所定の
位置で切断することにより第５図に示すような理想的な
段付細径管４を製造することができ、レーザダイオード
ユニットのガイド用として使用することができる。First, the lower jigs 12b and 14 of the clamp jigs 12.14
A metal tube 11 such as a Kovar pipe is placed on top b, upper jigs 12a and 14a of the clamp jig 12.14 are lowered, and both ends of the metal tube 110 are clamped by both clamp jigs 12.14. After that, a predetermined power is supplied from the power supply device 15 to both clamp jigs 12.14 via a cable, a predetermined voltage is applied between both clamp jigs 12.14, and the metal tube 11 is heated by energization. . At this time, hydraulic cylinder 1
3, when the clamping jig L4 is moved in the direction of the arrow, the metal tube 11 is stretched, and due to the tensile straightening effect, the center portion 11a (FIG. 2) of the metal tube 11 is reduced in diameter while maintaining straightness. After reducing the diameter to a predetermined size, the upper jigs 12a and 14a are raised, and the metal tube 11 placed thereon is
When taken out, it becomes a metal tube 11 with the diameter of the center portion 11a reduced as shown in FIG. A small diameter tube 4 can be manufactured and used as a guide for a laser diode unit.
また、この方法によると、同時に２つの段付細径管４を
製造することができるため、生産性が向上する。また、
加熱して引き伸ばすだけであるため、作業の簡素化およ
び工程数の削減を図ることができる。尚、必要に応じて
金属管１１の内外面に保護ガスを流すことにより加熱時
の酸化防止を図ることができる。Furthermore, according to this method, two stepped small-diameter tubes 4 can be manufactured at the same time, which improves productivity. Also,
Since it is simply heated and stretched, the work can be simplified and the number of steps can be reduced. Note that oxidation during heating can be prevented by flowing a protective gas into the inner and outer surfaces of the metal tube 11, if necessary.
第３図は中央部１１ａの内径規制を行う方法を示し、加
熱した金属管１１を引き伸ばす際に中子１７を挿入しな
がら引き伸ばすと、中央部１１ａは中子１７の外径によ
ってサイズ規制されるので、寸法精度の管理が容易にな
る。この中子１７は金属管１１の熱膨張係数より大きい
材質、例えば、金属管１１としてコバールパイプを使用
する場合、コバールパイプの熱膨張係数が５×１０−ｂ
程度であり、中子１７として、熱膨張係数が２０ Ｘ
１０− ’のマンガン鋼を用いると、加工後の中子１７
の抜去が容易となる。FIG. 3 shows a method for regulating the inner diameter of the central portion 11a. When the heated metal tube 11 is stretched while inserting the core 17, the size of the central portion 11a is regulated by the outer diameter of the core 17. Therefore, dimensional accuracy can be easily managed. The core 17 is made of a material whose thermal expansion coefficient is larger than that of the metal tube 11. For example, when a Kovar pipe is used as the metal tube 11, the thermal expansion coefficient of the Kovar pipe is 5×10-b.
The core 17 has a thermal expansion coefficient of 20
When using 10-' manganese steel, the core 17 after processing
This makes it easier to remove.
以上説明した通り、本発明の段付細径管の製造方法によ
ると、導電性を有するクランプ治具によって金属管の両
端を挟持し、両クランプ治具間に所定の電圧を印加する
ことによって金属管を通電加熱し、クランプ治具の一方
を所定の方向に移動させて金属管を引き伸ばすようにし
たため、作業の簡素化、工程数の削減およびコストダウ
ンを図ることができる。As explained above, according to the method for manufacturing a stepped small-diameter tube of the present invention, both ends of a metal tube are held between conductive clamp jigs, and a predetermined voltage is applied between both clamp jigs. Since the metal tube is stretched by heating the tube with electricity and moving one of the clamp jigs in a predetermined direction, it is possible to simplify the work, reduce the number of steps, and reduce costs.
第１図は本発明の一実施例を示す説明図、第２図は本発
明により得られる中間製品を示す説明図、第３図は中子
を挿入して段付細径管を製造する方法を示す説明図、第
４図はレーザダイオードユニットの概略構造を示す説明
図、第５図はレーザダイオードユニットに必要な段付細
径管を示す説明図、第６図は従来の段付細径管を示す説
明図。
符号の説明
１−−−−−−−・−・レーザダイオード２・−・−・
・−金ａ製ケース ３・−・〜・・・−・光ファイバ４
・−−−−〜−−−・・−・段付細径管 ５−−−−
−−−−−−−シース６・−一一一−−−・−樹脂
７−・−・−・・−・はんだ８・−一−−−・−
Ｍ ９−・−−−−−−−一大径管１０−
・−−−−−・・−細径管 １１−・・−・−・
−・金属管１２・・−・・−クランプ治具
１３・−・−・−・・油圧シリンダFig. 1 is an explanatory diagram showing one embodiment of the present invention, Fig. 2 is an explanatory diagram showing an intermediate product obtained by the present invention, and Fig. 3 is a method for manufacturing a stepped narrow diameter tube by inserting a core. Figure 4 is an explanatory diagram showing the schematic structure of the laser diode unit, Figure 5 is an explanatory diagram showing the stepped narrow diameter tube necessary for the laser diode unit, and Figure 6 is the conventional stepped narrow diameter tube. An explanatory diagram showing a tube. Explanation of symbols 1----------Laser diode 2--
・-Gold a case 3・-・〜・・Optical fiber 4
・－－－－〜－－－・・・・・・Stepped small diameter pipe 5－－－－
----------Sheath 6・-111----Resin
7−・−・−・・−・Solder 8・−1−−−・−
M 9-・----- One large diameter pipe 10-
・---------・・-Small diameter tube 11−・・−・−・
−・Metal pipe 12・・−・・−Clamp jig 13・−・−・−・・Hydraulic cylinder
Claims (2)
持する工程と、 前記治具間に所定の電圧を印加し、前記金 属管に通電して加熱する工程と、 前記治具の一方を所定の方向に移動させ、 前記加熱した金属管を引き伸ばして中央部の径を縮小さ
せる工程と、 前記中央部の径が縮小した金属管を所定の 位置で切断して段付細径管を製造する工程とを備えたこ
とを特徴とする段付細径管の製造方法。(1) a step of sandwiching both ends of a metal tube from above and below with a conductive jig; a step of applying a predetermined voltage between the jigs and heating the metal tube by energizing it; and one of the jigs. moving the heated metal tube in a predetermined direction and stretching the heated metal tube to reduce the diameter of the center portion; and cutting the metal tube with the reduced diameter of the center portion at a predetermined position to form a stepped narrow diameter tube. 1. A method for manufacturing a stepped narrow diameter tube, comprising a step of manufacturing.
記金属管よりも熱膨張係数の大きい中子を前記金属管の
中に挿入して引き伸ばす工程を有する請求項第１項記載
の段付細径管の製造方法。(2) The step of reducing the diameter of the central portion of the metal tube includes the step of inserting a core having a larger coefficient of thermal expansion than the metal tube into the metal tube and stretching it. A method for manufacturing a stepped small diameter pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10693888A JPH01278908A (en) | 1988-04-28 | 1988-04-28 | Manufacture of stepped small diameter tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10693888A JPH01278908A (en) | 1988-04-28 | 1988-04-28 | Manufacture of stepped small diameter tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01278908A true JPH01278908A (en) | 1989-11-09 |
Family
ID=14446330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10693888A Pending JPH01278908A (en) | 1988-04-28 | 1988-04-28 | Manufacture of stepped small diameter tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01278908A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003103327A (en) * | 2001-09-26 | 2003-04-08 | Honda Motor Co Ltd | Manufacturing method for hollow member |
| JP2008188602A (en) * | 2007-02-01 | 2008-08-21 | Tama Tlo Kk | Method and apparatus for working tubular member |
-
1988
- 1988-04-28 JP JP10693888A patent/JPH01278908A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003103327A (en) * | 2001-09-26 | 2003-04-08 | Honda Motor Co Ltd | Manufacturing method for hollow member |
| JP2008188602A (en) * | 2007-02-01 | 2008-08-21 | Tama Tlo Kk | Method and apparatus for working tubular member |
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