JPS616487A - Method of connecting pipe by using shape memory alloy - Google Patents
Method of connecting pipe by using shape memory alloyInfo
- Publication number
- JPS616487A JPS616487A JP59125036A JP12503684A JPS616487A JP S616487 A JPS616487 A JP S616487A JP 59125036 A JP59125036 A JP 59125036A JP 12503684 A JP12503684 A JP 12503684A JP S616487 A JPS616487 A JP S616487A
- Authority
- JP
- Japan
- Prior art keywords
- shape memory
- memory alloy
- pipe
- pipes
- liner
- 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
- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims description 33
- 238000000034 method Methods 0.000 title claims description 10
- 230000009466 transformation Effects 0.000 claims description 12
- 229910000734 martensite Inorganic materials 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims 1
- 239000010935 stainless steel Substances 0.000 description 13
- 229910001220 stainless steel Inorganic materials 0.000 description 13
- 239000000956 alloy Substances 0.000 description 12
- 229910045601 alloy Inorganic materials 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- KHYBPSFKEHXSLX-UHFFFAOYSA-N iminotitanium Chemical compound [Ti]=N KHYBPSFKEHXSLX-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001000 nickel titanium Inorganic materials 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 229910011212 Ti—Fe Inorganic materials 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L13/00—Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints
- F16L13/004—Shrunk pipe-joints
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は形状記憶合金を用いた管の接続方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of connecting pipes using a shape memory alloy.
形状記憶合金を管の継手として用いることは２特公昭５
２−５４５８号、特公昭５４−１８９８号。The use of shape memory alloys as pipe joints was introduced in 1973.
No. 2-5458, Special Publication No. 54-1898.
特公昭５５−４６８１０号等に示されている。このよう
な先行技術によると管の接続をより完全にし、信頼性を
高めるだめには形状記憶合金パイプの内側に鋸歯状の突
起を設けこの突起を管に食い込ませることにより形状記
憶合金パイプと管とを密着接続し、耐リーク性、耐引抜
力等に対処していた。It is shown in Japanese Patent Publication No. 55-46810. According to such prior art, in order to make the connection between the pipes more complete and to increase reliability, serrated protrusions are provided on the inside of the shape memory alloy pipe and the protrusions bite into the pipe, thereby making the connection between the shape memory alloy pipe and the pipe. These were closely connected to ensure leak resistance, pull-out force resistance, etc.
形状記憶合金としてはＮｉ−Ｔｉ合金、Ｃｕ−Ｚｎ−Ａ
ｔ合金、 Ｃｕ−Ａｔ−Ｎｉ合金、 Ｎｉ −Ｔｉ −
Ｘ合金（Ｘ＝ＦｅｌＣｕなど）等数１０種が既に知られ
ている。Shape memory alloys include Ni-Ti alloy, Cu-Zn-A
t alloy, Cu-At-Ni alloy, Ni-Ti-
Ten types of X alloys (X=FelCu, etc.) are already known.
しかし高信頼が求められる・ぐイブ継手用合金としては
主としてＮｉ−Ｔｉ合金、 Ｎｉ −Ｔｉ−Ｆｅ合金に
限定されているのが現状である。However, at present, alloys for gib joints that require high reliability are mainly limited to Ni-Ti alloys and Ni-Ti-Fe alloys.
パイプ継手用部材は、溶解法、粉末法等によって得られ
た素材を切削若しくは研削により所望のパイプに加工す
るのが一般的であるが、形状記憶合金の切削性は極めて
悪く、超硬工作冶具により初めて加工てきる程度である
。このため、加工に要する費用は極めて大きく、製造費
用の大半を占めているのが現状である。Materials for pipe fittings are generally made by cutting or grinding materials obtained by melting or powder methods, but the machinability of shape memory alloys is extremely poor, and carbide machining jigs are required. It is only possible to process it for the first time. Therefore, the cost required for processing is extremely high, and currently accounts for most of the manufacturing cost.
捷してや、継手の内側を鋸歯状に加Ｔすることは史に困
゛Ｊ、１１とな９１寸す捷す製造費用は大きくならざる
を得なくなってし寸っていた。Even after cutting, it would be difficult to add a sawtooth shape to the inside of the joint.
他方、接続さるべき管を挿入するために、該合金継手は
−２ルデンザイト変１川温度以下の温度（一般的に液体
窒素’Ｆ； ｒＮｌｔ下）で拡管される必要がある。On the other hand, in order to insert the pipe to be connected, the alloy joint needs to be expanded at a temperature below -2 rudenzite temperature (generally under liquid nitrogen 'F; rNlt).
その／こめに接う１：されるへき管への挿入時において
マンドレルを用いて、該継手を押し拡げる（拡６１′１
後マノドレルを該絹１手より抜いた時、該継手自身か朝
・と４−によシｆ￥収縮を起こす量を見込み、挿入時の
径よりも１５〜２チ程大きめに拡管するのが一般とされ
ている。）。ところで、内径側に鋸歯を有さない所謂ス
トレートな形状の継手は容易に拡管可能であるが、上述
した鋸歯を有する継手については、継手とマンドレル間
に鋸歯が拡管工程の障害とならないように保獲板（若し
くは鋸歯矯正板）を介する必要があり、極めて頻雑な工
程を経る必要がある。1: Use a mandrel to push and spread the joint when inserting it into the cleavage tube (expansion 61'1).
When the manodrel is removed from the silk, it is recommended to expand the tube to about 15 to 2 inches larger than the diameter at the time of insertion, in anticipation of the amount of contraction that will occur in the fitting itself. It is considered common. ). By the way, so-called straight-shaped joints that do not have saw teeth on the inner diameter side can be easily expanded, but the above-mentioned joints that have saw teeth must be kept between the joint and the mandrel so that the saw teeth do not interfere with the pipe expansion process. It is necessary to go through a cutting plate (or a serrated correction plate), and it is necessary to go through an extremely frequent process.
このために継手の拡管に要する費用はストレートパイプ
継手の２倍以上を要する結果となっていた。For this reason, the cost required to expand the joint was more than twice that of a straight pipe joint.
このように高信頼を得るべき鋸歯を有する該合金パイン
０継手の製造費用および拡管加工費用は。What are the manufacturing costs and tube expansion costs for this alloy Pine 0 joint with saw teeth that should ensure high reliability?
ストレートなパイフ０継手のそれらと比較するとはるか
に大きなものとなってしまうため、これ捷でに実用に供
された例としては航空機油圧・ぐイノ０継手等の数例に
限定されていたのが現状である。Since it is much larger than a straight pipe 0 joint, the practical use of this type was limited to a few examples such as aircraft hydraulics and Guino 0 joints. This is the current situation.
本発明は極めて容易に接続できるとともに接続後の信頼
性に富む従来に比へて安価な形状記憶合金を用いた管の
接続方法を提供するものである。The present invention provides a method for connecting pipes using a shape memory alloy that is extremely easy to connect, highly reliable after connection, and less expensive than conventional pipes.
本発明によれば、形状記憶合金よりなる継手部材をマル
テンサイト変態温度以下寸で冷却して。According to the present invention, a joint member made of a shape memory alloy is cooled to a temperature below the martensitic transformation temperature.
接続されるべき管の直径よシやや大きめに拡管せしめ、
接続されるべき管に接続用ライナーを配置。Expand the pipe to be slightly larger than the diameter of the pipe to be connected,
Place the connecting liner on the pipe to be connected.
接続の後、前記拡管された継手部・材を接続用ライナー
十に１１＞ξ合し、その後直ちに逆変態点温度以上に加
熱して、前記拡管された継手部材を収縮させて、前記接
Ｆｊｌ；されるへき管を接続するようにしたことを特徴
とする形状記憶合金を用いた管の接続方法が得られる。After the connection, the expanded joint member/material is joined to the connecting liner 11>ξ, and then immediately heated to a temperature higher than the reverse transformation point temperature to contract the expanded joint member and connect the joint Fjl. ; A method for connecting pipes using a shape memory alloy is obtained, which is characterized in that the pipes are connected to each other.
以下本発明について実施例に基づいて説明する。 The present invention will be explained below based on examples.
第１図（ａ）及び（ｂ）を参照して２寸ず第１の実施例
について説明すると２円環状の形状記憶合金リングぞは
Ｔ１Ｎｉ合金等の形状記憶合金で形成されておす、形状
記憶合金リンゲイの熱収縮温度（逆変態温度）ニ１、常
用ｒ晶度以］ミである。’Ｉ”ｉＮｉ 、 ＴｉＮ１Ｘ
（Ｘ＝ＦＣ＋ ＣｕＡ９）等の形状記憶合金は熱弾性マ
ルテンザイト変ｊルの逆変態に付随して顕著な形状記憶
効果を示すことが知られている。これらの形状記憶合金
をリング状に形成して、マルテンザイｉ・変態温度以下
で内径を変化率で８％まで拡けると変化率で６〜６．５
％のひずみは残留し、したがってリングは拡けられた形
状を保持する。このり／グを逆変態温度以上に加熱する
と、上記の６〜６５％のひずみは完全に解消され、リン
グは原型に復することになる。The first embodiment will be explained with reference to FIGS. 1(a) and (b). The two circular shape memory alloy ring grooves are made of a shape memory alloy such as T1Ni alloy. The heat shrinkage temperature (reverse transformation temperature) of the alloy ringay is 21, and the crystallinity of the alloy is 1 or higher. 'I'iNi, TiN1X
It is known that shape memory alloys such as (X=FC+CuA9) exhibit a remarkable shape memory effect accompanying the reverse transformation of thermoelastic martenzite transformation. If these shape memory alloys are formed into a ring shape and the inner diameter is expanded to a rate of change of 8% below the martenzai I transformation temperature, the rate of change will be 6 to 6.5.
% strain remains and therefore the ring retains its expanded shape. When this glue/g is heated above the reverse transformation temperature, the above-mentioned 6-65% strain is completely eliminated and the ring returns to its original shape.
第１図（ａ）に示すように、ステンレス管１はその一端
から長手方向に外側面が予じめ定められた寸法だけ切削
されている。この切削部を図示のように筒状の接続用≧
イナー２に挿入する。なお上記の切削はステンレス管１
の肉厚を形状記憶合金製素浸漬下でマンドレルによって
内径を５〜７係丑で押し拡げ、マルテンサイト変態温度
以下に保持して一対の形状記憶合金リング３を接続用ラ
イナー２上に配置する。なお形状記憶合金リング３の内
径はマンドレルで拡張する前においてはステンレス管１
の外径よりも若干小さいものとする。As shown in FIG. 1(a), the outer surface of the stainless steel tube 1 is cut by a predetermined dimension in the longitudinal direction from one end thereof. This cutting part is used for cylindrical connection ≧ as shown.
Insert into inner 2. Note that the above cutting is for stainless steel pipe 1.
The inner diameter of the shape memory alloy ring 3 is expanded by 5 to 7 degrees using a mandrel under immersion in the shape memory alloy material, and the pair of shape memory alloy rings 3 are placed on the connecting liner 2 while maintaining the temperature below the martensitic transformation temperature. . Note that the inner diameter of the shape memory alloy ring 3 is that of the stainless steel tube 1 before being expanded with a mandrel.
shall be slightly smaller than the outer diameter of.
このようにして、ステンレス管］に接続用ライナー２及
び形状記憶合金リング７３を配置した後。After the connecting liner 2 and the shape memory alloy ring 73 are placed on the stainless steel pipe in this way.
この接続部を液体窒素で」−分に冷却し、その後加熱し
て逆変態温度以上として形状記憶合金リング３を収縮さ
せて、第１図（ｂ）に示すように、ステンレス管１を局
部的に変形させて密接合とする。This joint is cooled with liquid nitrogen for 10-minutes, and then heated to a temperature higher than the reverse transformation temperature, causing the shape memory alloy ring 3 to contract, and as shown in FIG. 1(b), the stainless steel tube 1 is locally to form a close fit.
外径］、５．８８ｍｍのステンレス管に内径］、 ５．
２５ ｍｍの形状記憶合金リングを用いて、ステンレス
管を接続した場合Ｉ Ｊ（ｅ ！Ｊ−クチストの結果、
継手部分からのリーク漏れは認められなかった。また引
抜きに対してば］、 ００ ｋｇ ｆ ／１ｙｎ２以上
の引き抜きに耐えた。なお−上述の第１の実施例の場合
において。Outer diameter], 5.88mm stainless steel tube with inner diameter], 5.
When a stainless steel pipe is connected using a 25 mm shape memory alloy ring, the result of I J (e!
No leakage was observed from the joints. In addition, with respect to pulling out], it withstood pulling out of 00 kg f /1yn2 or more. Note - in the case of the first embodiment described above.
ステンレス管１と接続用ライナー２との肉厚が２″″″
・Ｔ１Ｎｉ形状記憶合金リング３の肉厚が２〜２５咽で
あると形状記憶合金リング３の収縮によってステンレス
管１の変形は可能であった。また接続用ライナー２とス
テンレス管１のクリアランスは小さい方か形状記憶合金
リング３の収縮力をより有効にすることができるため、
接続作業に支障を生じない程度まで小さくすることが望
ましい。The wall thickness between the stainless steel pipe 1 and the connecting liner 2 is 2″″″
- When the thickness of the T1Ni shape memory alloy ring 3 was 2 to 25 mm, the stainless steel pipe 1 could be deformed by shrinkage of the shape memory alloy ring 3. In addition, the clearance between the connecting liner 2 and the stainless steel pipe 1 is smaller, or the shrinkage force of the shape memory alloy ring 3 can be made more effective.
It is desirable to make it as small as possible so as not to interfere with the connection work.
次に第２図（ａ）及び（ｂ）を参照して２本発明の第２
の実施例について説明すると、この実施例では第］の実
施例で用いプζ接続用ライナー２の例に図示のように一
面に鋸歯状の突起部４１が設けられた接続用ライナー（
以下鋸歯型ライナーと呼ぶ。）４を管上に配置してさら
に鋸歯型ライナー４」−に図示のように形状記憶合金パ
イプ０５をかふせる。Next, referring to FIGS. 2(a) and (b), the second embodiment of the present invention will be described.
Embodiment 2 will be described. In this embodiment, a connection liner (2) having a serrated protrusion 41 on one side as shown in the figure is an example of the connection liner 2 used in the second embodiment.
Hereinafter, it will be referred to as a serrated liner. ) 4 is placed on the pipe, and the sawtooth liner 4'' is further covered with a shape memory alloy pipe 05 as shown.
なおこの形状記憶合金パイプ″′５は第１の実施例で説
明したように液体窒素に浸漬されて、マルトシルによっ
て変形を受けている。このようにして形状記憶合金パイ
プ５を配置した後、さらに液体窒素に浸漬し、その後加
熱して逆変態点温度以上として形状記憶合金・ぐイブ５
を収縮させて、鋸歯型ライナー４の鋸歯状突起部４」を
管にくい込才せて、ステンレス管１の接続が完了する。Note that this shape memory alloy pipe "'5 is immersed in liquid nitrogen and deformed by Maltosil as described in the first embodiment. After arranging the shape memory alloy pipe 5 in this way, further Shape memory alloy Guibu 5 is immersed in liquid nitrogen and then heated to a temperature higher than the reverse transformation point.
The serrated projections 4 of the serrated liner 4 are inserted into the pipe by contracting, and the connection of the stainless steel pipe 1 is completed.
さらに上述した第１の実施例及び第２の実施例において
、接続されるべき管が同材質（例えばステンレス管同士
）の場合には、第１の実施例が有効であシ、接続される
べき管が異（２質（例えばステンレス管とノルカイロイ
管）の場合には、第２の実施５１Ｊが有効である。Furthermore, in the first embodiment and the second embodiment described above, if the pipes to be connected are made of the same material (for example, stainless steel pipes), the first embodiment is effective. When the tubes are of different materials (for example, stainless steel tube and Norchiloy tube), the second embodiment 51J is effective.
接続用ライナーの材質は好ましくは接続されるべき管と
同材質の方が腐食を考慮した場合には最適である。そし
て、接続されるべき管が異材質の場合には腐食及び材料
剛性を考慮してライナーを選択する必要かある。The material of the connecting liner is preferably the same as that of the pipe to be connected, in view of corrosion. If the pipes to be connected are made of different materials, it is necessary to select a liner in consideration of corrosion and material rigidity.
以上説明したように２本発明によれば形状記憶合金製の
継手に特別の加工を施すことなく、即ち単にストレート
ーク１１１かよい管の接続を行うことができ，従って従
来の接続力法に比較して極めて安価に配管接続をするこ
とができるという利点がある。As explained above, according to the present invention, it is possible to simply connect straight-talk 111 pipes without special processing to the shape-memory alloy joint, and therefore, compared to the conventional connection force method, This has the advantage that piping connections can be made at extremely low cost.
第１図（ａ）は本発明による第１の実施例について管接
続前の状態で示す断面図，第１図（ｂ）は本発明による
第１の実施例について管接続後の状態で示す断面図，第
２図（ａ）は本発明による第２の実施例について管接続
前の状態で示す断面図，第２図（＋））は本発明による
第２の実施例について管接続後の状態で示す断面図であ
る。
１・・・管，２，４・・・接続用ライナー、３・・・形
状記憶合金リング、５・・形状記憶合金パイプ。
第１図
（α）
（ｂ）
゛°：ＩFIG. 1(a) is a cross-sectional view of the first embodiment of the present invention before the pipes are connected, and FIG. 1(b) is a cross-sectional view of the first embodiment of the present invention after the pipes are connected. Figure 2(a) is a sectional view of the second embodiment of the present invention before pipe connection, and Figure 2 (+) is a cross-sectional view of the second embodiment of the present invention after pipe connection. FIG. 1... Pipe, 2, 4... Connection liner, 3... Shape memory alloy ring, 5... Shape memory alloy pipe. Figure 1 (α) (b) ゛°:I
Claims (1)
態温度以下まで冷却して、接続されるべき管の直径より
やや大きめに拡管せしめ、接続されるべき管に接続用ラ
イナーを配置、接続の後、前記拡管された継手部材を接
続用ライナー上に嵌合し、その後直ちに逆変態点温度以
上に加熱して、前記拡管された継手部材を収縮させて、
前記接続されるべき管を接続するようにしたことを特徴
とする形状記憶合金を用いた管の接続方法。1. Cool the joint member made of shape memory alloy to below the martensitic transformation temperature, expand it to a diameter slightly larger than the diameter of the pipe to be connected, place a connecting liner on the pipe to be connected, and after the connection, Fitting the expanded joint member onto a connecting liner, and then immediately heating the expanded joint member to a temperature higher than a reverse transformation temperature to shrink the expanded joint member,
A method for connecting pipes using a shape memory alloy, characterized in that the pipes to be connected are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59125036A JPS616487A (en) | 1984-06-20 | 1984-06-20 | Method of connecting pipe by using shape memory alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59125036A JPS616487A (en) | 1984-06-20 | 1984-06-20 | Method of connecting pipe by using shape memory alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS616487A true JPS616487A (en) | 1986-01-13 |
Family
ID=14900255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59125036A Pending JPS616487A (en) | 1984-06-20 | 1984-06-20 | Method of connecting pipe by using shape memory alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS616487A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05501143A (en) * | 1989-02-23 | 1993-03-04 | エアロフィット・プロダクツ・インコーポレイテッド | Method of forming a mechanical connection to an object and assembly for forming a mechanical connection to an object |
| WO2013073540A1 (en) * | 2011-11-17 | 2013-05-23 | 日本電気株式会社 | Pipe connection structure and pipe connection method |
-
1984
- 1984-06-20 JP JP59125036A patent/JPS616487A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05501143A (en) * | 1989-02-23 | 1993-03-04 | エアロフィット・プロダクツ・インコーポレイテッド | Method of forming a mechanical connection to an object and assembly for forming a mechanical connection to an object |
| WO2013073540A1 (en) * | 2011-11-17 | 2013-05-23 | 日本電気株式会社 | Pipe connection structure and pipe connection method |
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