JPS61269970A - Joining method for refrigerant pipe - Google Patents
Joining method for refrigerant pipeInfo
- Publication number
- JPS61269970A JPS61269970A JP11068585A JP11068585A JPS61269970A JP S61269970 A JPS61269970 A JP S61269970A JP 11068585 A JP11068585 A JP 11068585A JP 11068585 A JP11068585 A JP 11068585A JP S61269970 A JPS61269970 A JP S61269970A
- Authority
- JP
- Japan
- Prior art keywords
- refrigerant
- refrigerant pipe
- brazing
- filler metal
- joining
- 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
Landscapes
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）発明の技術分野
本発明は、２本の冷媒管の管端をろう付によって接合す
る冷媒管の接合方法に関する。DETAILED DESCRIPTION OF THE INVENTION (A) Technical Field of the Invention The present invention relates to a refrigerant pipe joining method for joining the pipe ends of two refrigerant pipes by brazing.
ψ）従来技術と問題点
従来から作業現場における冷媒管のろう付による接合は
、簡便性、少量生産性に優れるいわゆる差しろう方法に
依っていた。ψ) Prior art and problems Conventionally, the joining of refrigerant pipes at work sites by brazing has relied on the so-called brazing method, which is simple and easy to produce in small quantities.
従来における２本の冷媒管の管端の差しろう方式による
接合を第６図によって説明する。第１冷媒管ａのフレア
状の管端す内に第２冷媒管Ｃの管端ｄを嵌入する。次い
で、作業者は右手にバーナｅを持ち左手に棒状のろう材
ｆを持ち、ろう材ｆの先端部ｆ１を溶融させながらろう
材ｆを両冷媒管ａ、ｃの間に添加する。The joining of the pipe ends of two refrigerant pipes in the conventional method using a soldering method will be explained with reference to FIG. The tube end d of the second refrigerant tube C is fitted into the flared tube end of the first refrigerant tube a. Next, the operator holds the burner e in his right hand and the rod-shaped brazing filler metal f in his left hand, and adds the brazing filler metal f between the refrigerant pipes a and c while melting the tip end f1 of the brazing filler metal f.
しかしながら、この従来の差しろう付方法で２本の冷媒
管を接合するにあたっては次に示す欠点を有する。However, joining two refrigerant pipes using this conventional plug-brazing method has the following drawbacks.
第１に、棒状のろう材の先端部を溶融させつつ両冷媒管
を加熱する必要があるが、ろう材の加熱と両冷媒管の加
熱を同時にすることができない。First, it is necessary to heat both refrigerant pipes while melting the tip of the rod-shaped brazing material, but it is not possible to heat the brazing material and heating both refrigerant pipes at the same time.
このため、両冷媒管の間に均一かつ確実にろう材を流し
込むことができない。又、ろう材を溶融する必要からろ
う柱側の両冷媒管の管端を加熱し、ろう材と反対側の管
端は充分に加熱されず、ろう付されていない部分も生ず
る。For this reason, it is not possible to uniformly and reliably pour the brazing material between the two refrigerant pipes. Furthermore, because it is necessary to melt the brazing material, the ends of both refrigerant tubes on the brazing column side are heated, and the tube ends on the opposite side from the brazing material are not sufficiently heated, resulting in some unbrazed portions.
第２に、溶融ろうは第１冷媒管の管端の最端部から両冷
媒管の間に流れ込むので、作業者は両冷媒管の間にどの
程度溶融ろうが流れ込んでいるのか確認することができ
ない。従って、両冷媒管の間にろう材が流れ込まず、両
冷媒管の接合強度を確保できない場合を確認することが
できない。又、両冷媒管の間にろう材を確実に流し込も
うとすることからろう材の使用量も多くなる。Second, since the molten wax flows between the two refrigerant pipes from the very end of the first refrigerant pipe, it is difficult for the operator to check how much molten wax has flowed between the two refrigerant pipes. Can not. Therefore, it is not possible to confirm the case where the brazing material does not flow between the two refrigerant pipes and the joining strength between the two refrigerant pipes cannot be ensured. Furthermore, since it is necessary to reliably flow the brazing material between the two refrigerant pipes, the amount of brazing material used also increases.
第３に、ろう材は片面から溶融するため作業時間が掛か
る。従って、両冷媒管の管端の表面が酸化され、ろう材
が母材たる両冷媒管にぬれない場合も生じ、ろう付品質
の不具合を発生させる。Third, since the brazing filler metal is melted from one side, it takes time to work. Therefore, the surfaces of the pipe ends of both refrigerant pipes are oxidized, and the brazing material may not wet the base metals of both refrigerant pipes, causing defects in brazing quality.
第４に、ろう付作業は熟練を必要とする。未熟練者によ
る作業の場合には、ろう付の品質を確保できず、又、溶
融ろうが両冷媒管間に流れ込まず第１冷媒管の外に落ち
ることもあり、ろう材の使用量が著しく多くなる。Fourth, brazing requires skill. If the work is performed by unskilled personnel, the quality of the brazing cannot be ensured, and the molten wax may not flow between the two refrigerant pipes and may fall outside the first refrigerant pipe, resulting in a significant amount of brazing material being used. There will be more.
第５に、作業者は右手にろう材を持ち、左手にバーナを
持って作業しなければならないので安全性にも問題があ
る。Fifth, the worker must hold the brazing filler metal in his right hand and the burner in his left hand, which poses a safety problem.
（ハ）発明の目的
本発明は上述の問題を解決するためになされたもので、
その目的は、両冷媒管を品質的に確実にろう付接合し、
ろう材の使用量を低減し、ろう付作業時間を削減し、未
熟練者でも作業可能とし、安全性を向上させた冷媒管の
接合方法を提供することである。(c) Purpose of the invention The present invention was made to solve the above-mentioned problems.
The purpose is to braze and join both refrigerant pipes in a reliable manner in terms of quality.
To provide a method for joining refrigerant pipes that reduces the amount of brazing filler metal used, reduces brazing work time, allows even unskilled workers to perform the work, and improves safety.
仁）発明の構成
上記目的を達成するために、本発明はフレア状の管端を
有する第１冷媒管の管端内に第２冷媒管の管端を嵌入し
両冷媒管間にろう材を溶融させてろう付する冷媒管の接
合方法に於て、第１冷媒管の管端のフレア部の段部上に
リング状のろう材を載置し、次いで、第２冷媒管の管端
を嵌入した後、第１冷媒管のフレア部を加熱するもので
ある。Structure of the Invention In order to achieve the above object, the present invention includes fitting the end of a second refrigerant pipe into the end of a first refrigerant pipe having a flared end, and placing a brazing material between both refrigerant pipes. In a method of joining refrigerant pipes by melting and brazing, a ring-shaped brazing material is placed on the stepped part of the flared part of the pipe end of the first refrigerant pipe, and then the pipe end of the second refrigerant pipe is After fitting, the flare portion of the first refrigerant pipe is heated.
（ト）発明の実施例 以下、図面により本発明の実施例を詳細に説明する。(g) Examples of the invention Embodiments of the present invention will be described in detail below with reference to the drawings.
本実施例に係る冷媒管の接合方法は第１図〜第５図に示
される。A method of joining refrigerant pipes according to this embodiment is shown in FIGS. 1 to 5.
第１図に示すようにフレア状の管端（以下、フレア部と
いう）１を有する第１冷媒管２のフレア部１内に予めリ
ング状ろう材３を載置した後第１冷媒管２のフレア部１
内に第２冷媒管４の管端を嵌入し両冷媒管２，４をろう
付接合するものである。As shown in FIG. 1, a ring-shaped brazing material 3 is placed in advance in the flare part 1 of the first refrigerant pipe 2 having a flared pipe end (hereinafter referred to as "flare part") 1. Flare part 1
The tube end of the second refrigerant tube 4 is inserted into the tube, and both the refrigerant tubes 2 and 4 are brazed and joined.
以下、詳細に説明する。This will be explained in detail below.
第１冷媒管２のフレア部１内に第４図に示すリング状ろ
う材３を載置する。リング状ろう材３としては例えば銀
ろう２ｗ４ろう等が用いられる。リング状ろう材３の形
状は第４図に示すような図示しない板状体からｍ＜切断
し、これを円形状にしたものが経済上の理由から用いら
れている。もちろん切れ目３ａのない円形状のものを用
いることもできる。A ring-shaped brazing filler metal 3 shown in FIG. 4 is placed inside the flare portion 1 of the first refrigerant pipe 2. As the ring-shaped brazing material 3, for example, silver solder 2w4 solder or the like is used. For economical reasons, the ring-shaped brazing material 3 is cut into a circular shape by cutting m<m from a plate-shaped body (not shown) as shown in FIG. 4. Of course, a circular shape without cuts 3a can also be used.
次いで、第２冷媒管４の管端５を第１冷媒管２のフレア
部１に嵌入すると第１図に示す状態となる。Next, when the tube end 5 of the second refrigerant tube 4 is fitted into the flare portion 1 of the first refrigerant tube 2, the state shown in FIG. 1 is obtained.
そして、第１図に示す状態から第１冷媒管２のフレア部
ｌの最端部１ｂを、例えば第５図に示す２０バーナ６で
フレア部１の両側を同時に加熱する。リング状ろう材３
はこの加熱によって両冷媒管２．４の間全面に溶融し第
２図に示す熔融ろう３Ａとなる。Then, from the state shown in FIG. 1, the outermost end 1b of the flare portion 1 of the first refrigerant pipe 2 is simultaneously heated on both sides of the flare portion 1 using, for example, the 20 burner 6 shown in FIG. Ring-shaped brazing filler metal 3
This heating melts the entire surface between the two refrigerant pipes 2.4, forming a molten solder 3A shown in FIG.
リング状ろう材３が全部溶融すると溶融ろう３Ａは両冷
媒管２，４の間から第３図に示すような溢れ出る状態と
なり、この時直ちに加熱を止める。When the ring-shaped brazing filler metal 3 is completely melted, the molten brazing filler metal 3A overflows from between the two refrigerant pipes 2 and 4 as shown in FIG. 3, and the heating is immediately stopped at this time.
加熱を止めることによって熔融ろう３．Ａは冷却凝固し
母材たる両冷媒管２．４はろう付接合される。Melting wax by stopping heating 3. A is cooled and solidified, and both refrigerant pipes 2.4, which are base materials, are joined by brazing.
次に、本発明の詳細な説明する。Next, the present invention will be explained in detail.
第１冷媒管２のフレア部１の段部１ａにリング状ろう材
３を載置した状態において、第１冷媒管２のフレア部１
の最端部１ｂ附近が２０バーナ６によって平均に加熱さ
れると、この熱が平均にリング状ろう材３に伝達され、
リング状ろう材３はほぼ平均に溶融する。そして、溶融
ろう３Ａは２０バーナ６で加熱され温度の高いフレア部
１の最端部１ｂ方向に引っ張られ両冷媒管２，４の間全
面に流れ込むに至る。In a state where the ring-shaped brazing material 3 is placed on the step part 1a of the flare part 1 of the first refrigerant pipe 2, the flare part 1 of the first refrigerant pipe 2
When the vicinity of the outermost end 1b is heated evenly by the 20 burners 6, this heat is evenly transmitted to the ring-shaped brazing filler metal 3,
The ring-shaped brazing filler metal 3 melts approximately evenly. Then, the molten wax 3A is heated by the 20 burner 6, pulled toward the highest end 1b of the flare section 1, and flows all over between the two refrigerant pipes 2 and 4.
次に、本実施例による効果を説明する。Next, the effects of this embodiment will be explained.
第１に、第１冷媒管２のフレア部１の段部１ａにリング
状ろう材３を載置するので確実にリング状ろう材３を位
置決めセットすることができる。First, since the ring-shaped brazing filler metal 3 is placed on the stepped portion 1a of the flare portion 1 of the first refrigerant pipe 2, the ring-shaped brazing filler metal 3 can be reliably positioned and set.
第２に、第１冷媒管２のフレア部１に載置されたリング
状ろう材３は平均に加熱され、はぼ平均に溶融するので
、溶融ろう３Ａは両冷媒管２．４の間全面に確実かつ均
一に満たされ、品質が安定したろう付接合ができる。Second, the ring-shaped brazing filler metal 3 placed on the flare part 1 of the first refrigerant pipe 2 is heated evenly and melts almost evenly, so that the molten brazing filler metal 3A is spread over the entire surface between the two refrigerant pipes 2.4. It is possible to reliably and uniformly fill the brazing joints with stable quality.
第３に、第１冷媒管２のフレア部１に載置されたリング
状ろう材３は前述の如く確実にセットされ平均に加熱さ
れ、溶融ろう３Ａはフレア部１の段部１ａから最端部１
ｂ方向に流れ込むので、溶融ろう３Ａは確実に両冷媒管
２，４の間に満たされ、確実な品質のろう付接合ができ
る。Thirdly, the ring-shaped brazing filler metal 3 placed on the flared portion 1 of the first refrigerant pipe 2 is reliably set and heated evenly as described above, and the molten brazing filler metal 3A is heated from the stepped portion 1a of the flared portion 1 to the farthest end. Part 1
Since it flows in the b direction, the molten solder 3A is reliably filled between the two refrigerant pipes 2 and 4, and a brazed joint of reliable quality can be achieved.
第４に、溶融ろう３Ａが両冷媒管２，４の間から溢れ出
る状態をもって、溶融ろう３Ａの流れ込みの状態を確実
に確認することができる。Fourthly, when the molten wax 3A overflows from between the refrigerant pipes 2 and 4, it is possible to reliably check the state of the molten wax 3A flowing in.
第５に、リング状ろう材３は一定量が第１冷媒管２のフ
レア部１に載置され、ただ単に両冷媒管２．４を加熱す
ればよいからリング状ろう材３の使用量が多くなること
なく一定している。Fifth, since a certain amount of the ring-shaped brazing filler metal 3 is placed on the flare part 1 of the first refrigerant pipe 2, and it is only necessary to heat both the refrigerant pipes 2.4, the amount of ring-shaped brazing filler metal 3 used can be reduced. It remains constant without increasing.
第６に、リング状ろう材３は第１冷媒管２のフレア部１
に載置されているため、フレア部１の両側からリング状
ろう材３を加熱することができる。Sixthly, the ring-shaped brazing filler metal 3 is the flare part 1 of the first refrigerant pipe 2.
Since the ring-shaped brazing filler metal 3 is placed on both sides of the flare portion 1, it is possible to heat the ring-shaped brazing filler metal 3 from both sides of the flare portion 1.
従って、両冷媒管２．４の表面も酸化され難く、又ろう
付作業時間も少なくなる。Therefore, the surfaces of both refrigerant pipes 2.4 are less likely to be oxidized, and the brazing work time is also reduced.
第７に、作業者はただ単に両冷媒管２．４を加熱し、両
冷媒管２．４の間から溶融ろう３Ａが溢れ出る状態を確
認すればよいから、未熟練者でもろう付作業が可能にな
ると共に安全性も向上する。Seventh, the operator can simply heat both refrigerant pipes 2.4 and check that the molten solder 3A overflows from between the refrigerant pipes 2.4, so even unskilled workers can perform the brazing work. Not only is this possible, but safety is also improved.
さらに、従来の差しろう方式に比べて簡便性、少量生産
性に劣ることもない。Furthermore, it is not inferior in simplicity and productivity in small quantities compared to the conventional gauging method.
以上の如き構成に係る冷媒管の接合方法によれば、リン
グ状ろう材３は両冷媒管２，４の間全面に確実に溶融し
流れ込むので、両冷媒管２．４におけるろう付品質を満
足させてろう付接合することができ、熔融ろう３Ａの流
れ込みの状態を間遠いなべ確認することができ、リング
状ろう材３の １使用量を低減することができ
、ろう付作業時間も短縮することができ、しかも、作業
の安全性゛も向上するという効果を奏する。According to the method for joining refrigerant pipes having the above configuration, the ring-shaped brazing material 3 reliably melts and flows over the entire surface between the refrigerant pipes 2 and 4, so that the brazing quality in both the refrigerant pipes 2 and 4 is satisfied. The brazing process can be performed by brazing, the state of the molten solder 3A flowing into the pot can be confirmed at a distance, the amount of ring-shaped brazing filler metal 3 used can be reduced, and the brazing work time can also be shortened. Moreover, it has the effect of improving work safety.
なお、本実施例においては両冷媒管２．４を加熱する手
段として、２０バーナ６を使用しているが、両冷媒管２
，４を一対の電極で挾み、両電極間に電流を流すことに
より加熱（ジュール熱を利用）することもできる。ある
いは高周波誘導加熱ろう付を利用することもできる。In this embodiment, a 20 burner 6 is used as a means for heating both refrigerant pipes 2.4;
, 4 can be sandwiched between a pair of electrodes and heated (using Joule heat) by passing a current between the two electrodes. Alternatively, high frequency induction heating brazing can also be used.
又、２０バーナ６の代わりに１０バーナを廻しながら使
用することによって両冷媒管２，４を均等に加熱するこ
ともできる。Also, by rotating and using 10 burners instead of 20 burners 6, both refrigerant pipes 2 and 4 can be heated evenly.
（へ）発明の効果
以上述べたように、本発明によれば、２つの冷媒管を品
質的に確実にろう付接合することができ、溶融ろうの流
れ込みの状態を確実に確認でき、ろう材の使用量を低減
することができ、ろう付作業時間を削減することができ
、未熟練者でもろう付作業が可能になり、ろう付作業の
安全性を確保できるという効果を奏する。(f) Effects of the Invention As described above, according to the present invention, two refrigerant pipes can be reliably brazed together in terms of quality, the state of the flow of molten solder can be reliably confirmed, and the brazing material It is possible to reduce the usage amount of brazing work, reduce the brazing work time, enable even unskilled people to perform the brazing work, and ensure the safety of the brazing work.
第１図はリング状ろう材を第１冷媒管の管端のフレア部
の段部に載置した図、第２図はリング状ろう材が両冷媒
管全面に溶融した状態を示す図、第３図は溶融ろうが両
冷媒管から溢れ出た状態を示す図、第４図はリング状ろ
う材の形状を示す斜視図、第５図はリング状ろう材の加
熱手段の一例を示す図、第６図は従来におけるろう付接
合方法を説明する図である。
１・・・フレア状の管端（フレア部）、１ａ・・・フレ
ア部の段部、１ｂ・・・フレア部の最端部、２・・・第
１冷媒管、３・・・リング状ろう材、４・・・第２冷媒
管、５・・・第２冷媒管の管端、６・・・２０バーナ。Figure 1 shows the ring-shaped brazing filler metal placed on the stepped part of the flared end of the first refrigerant pipe. Figure 2 shows the ring-shaped brazing filler metal melted over the entire surface of both refrigerant pipes. 3 is a diagram showing a state in which molten solder overflows from both refrigerant pipes, FIG. 4 is a perspective view showing the shape of a ring-shaped brazing filler metal, and FIG. 5 is a diagram showing an example of a heating means for a ring-shaped brazing filler metal. FIG. 6 is a diagram illustrating a conventional brazing joining method. DESCRIPTION OF SYMBOLS 1... Flared pipe end (flare part), 1a... Step part of flare part, 1b... Endmost part of flare part, 2... First refrigerant pipe, 3... Ring shape Brazing metal, 4... Second refrigerant pipe, 5... Pipe end of the second refrigerant pipe, 6... 20 burners.
Claims (2)
２冷媒管の管端を嵌入し両冷媒管間にろう材を溶融させ
てろう付する冷媒管の接合方法に於て、第１冷媒管の管
端のフレア部の段部上にリング状のろう材を載置し、次
いで、第２冷媒管の管端を嵌入した後、第１冷媒管のフ
レア部を加熱することを特徴とする冷媒管の接合方法。(1) A refrigerant pipe joining method in which the end of a second refrigerant pipe is fitted into the end of a first refrigerant pipe having a flared end, and a brazing material is melted and brazed between both refrigerant pipes. Then, a ring-shaped brazing material is placed on the stepped part of the flared portion of the tube end of the first refrigerant tube, and then, after the tube end of the second refrigerant tube is fitted, the flared portion of the first refrigerant tube is heated. A method for joining refrigerant pipes, characterized by:
めることを特徴とする特許請求の範囲第１項記載の冷媒
管の接合方法。(2) A method for joining refrigerant pipes according to claim 1, characterized in that heating is stopped when molten wax overflows from between both refrigerant pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11068585A JPS61269970A (en) | 1985-05-23 | 1985-05-23 | Joining method for refrigerant pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11068585A JPS61269970A (en) | 1985-05-23 | 1985-05-23 | Joining method for refrigerant pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61269970A true JPS61269970A (en) | 1986-11-29 |
Family
ID=14541851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11068585A Pending JPS61269970A (en) | 1985-05-23 | 1985-05-23 | Joining method for refrigerant pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61269970A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002301567A (en) * | 2001-04-03 | 2002-10-15 | Dai Ichi High Frequency Co Ltd | Method for producing complexed cylindrical or columnar body |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5336368U (en) * | 1976-09-02 | 1978-03-30 |
-
1985
- 1985-05-23 JP JP11068585A patent/JPS61269970A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5336368U (en) * | 1976-09-02 | 1978-03-30 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002301567A (en) * | 2001-04-03 | 2002-10-15 | Dai Ichi High Frequency Co Ltd | Method for producing complexed cylindrical or columnar body |
| JP4484390B2 (en) * | 2001-04-03 | 2010-06-16 | 第一高周波工業株式会社 | Manufacturing method of composite cylinder / column |
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