JPS60177957A - Brazing method of copper pipe - Google Patents

Abstract

PURPOSE:To eliminate an individual error in brazing of copper pipes and to enable uniform brazing by depositing amorphous alloy foil for brazing on at least one end of the copper pipes to be connected to each other than connecting the copper pipes to each other and joining the pipes by heating. CONSTITUTION:The above-described amorphous alloy solder is exemplified by the foil formed by working an alloy consisting essentially of Cu, more preferably a Cu-Ni-Sn-P alloy by an ultra-quick cooling method to a foil strip having roughness. Amorphous alloy foil 2 for brazing is then stripped from backing paper 1 and is wound on the end of, for example, a copper pipe 4 to be inserted. Said end is inserted into the end of a copper pipe 3 and is heated to solder the ends. The foil 2 is preferably wound on the end of the pipe 4 so as to project slightly therefrom in this case. The brazing material used in this invention has an amorphous structure and has therefore good fluidity thus obviating substantially the split melting during brazing. The need for polishing the joint part of the copper pipe and coating a flux thereon is thus eliminated.

Description

【発明の詳細な説明】 技術分野 本発明は、新しいろう付箔を用いた鋼管のろう付は方法
に関する。TECHNICAL FIELD The present invention relates to a method for brazing steel pipes using a new brazing foil.

従来技術 鋼管の接合には、毛細管川縁を利用したろう付は方法が
広く利用されている。使用ツるろう材には硬ろつと軟ろ
うとがあり、比較的大径管の接合にはりん銅ろう、銀ろ
うの如き硬ろうを又比較的小径管の接合には錫、銀ハン
ダ、ハンダの如き軟ろうを用いる。BACKGROUND OF THE INVENTION Brazing methods using capillary edges are widely used to join steel pipes. There are two types of soldering materials: hard solder and soft solder. For joining relatively large diameter pipes, hard solders such as phosphor copper solder and silver solder are used. For joining relatively small diameter pipes, tin, silver solder, and solder are used. Use soft wax like .

いずれの場合でもろう付けは次の作業工程で行なう。In either case, brazing will be done in the next step.

ａ、管端修正→ｂ、端部みがき→Ｃ，フラックス塗布→
ｄ、加熱→ｅ、ろう差し、 上記工程中、ａ、ｂ、ｃの中いずれの工程を省略しても
よい接合は得られないし、またｃ、ｅの工程では個人差
があり、塗りすぎや塗り不足、ろう材差し量の多少があ
って、均一な製品が得られにくい。a. Pipe end correction → b. End polishing → C. Flux application →
d. Heating → e. Brazing. Among the above steps, omitting any one of steps a, b, and c will not result in a good bond, and there are individual differences in steps c and e. It is difficult to obtain a uniform product due to shortages and the amount of brazing material inserted.

目　的 本発明は、上記従来の問題点を解消したもので、鋼管の
ろう付を個人差なく均一に行なえるようにしたものであ
る。Purpose The present invention solves the above-mentioned conventional problems and enables steel pipes to be uniformly brazed without individual differences.

構　成 本発明は相互に接続すべき銅管の少なくとも一方の端部
にアモルファス合金ろう付箔を被着して、鋼管を相互に
接続し、加熱接合することを特徴とする鋼管のろう付は
方法である。Structure The present invention provides a method for brazing steel pipes, which comprises applying an amorphous alloy brazing foil to at least one end of copper pipes to be connected to each other, connecting the steel pipes to each other, and joining them by heating. It is.

本発明に用いるアモルファス合金ろう付箔としては、Ｃ
ｕを主成分とする合金好ましくはＱｕ−Ｎｉ−３ｎ　−
ｐの合金を超急冷法により靭性のある熱帯に加工してな
るものが例示できる。本発明におけるアモルファス合金
としては５０％以上が無定形（非晶質）の構造をなすも
のである。The amorphous alloy brazing foil used in the present invention includes C
An alloy containing u as a main component, preferably Qu-Ni-3n −
An example is one obtained by processing a P alloy into a tough tropical material using an ultra-quenching method. The amorphous alloy in the present invention has an amorphous (non-crystalline) structure of 50% or more.

結晶質合金では組成上圧延加工が不可能とされているろ
う材のような脆い合金でも容易に柔軟性に富んだ箔とな
る。Even brittle alloys such as brazing filler metals, which cannot be rolled due to their composition, can easily be made into highly flexible foils.

かかる箔を鋼管へ被着させるについては、所要長に切断
して巻き付【プるだ（プでもよいし、接着剤を塗布して
貼付けてもよく、接着剤の場合は、例えば第１図に示す
ように、従来の剥離紙の如（にして用いることができる
。すなわち台１Ｉｌｔ１の上に接着剤により所定長のア
モルファス合金ろう何部２を貼着してなるものである。To attach such foil to the steel pipe, cut it to the required length and wrap it around the steel pipe. As shown in FIG. 1, it can be used like a conventional release paper. That is, it is made by pasting a predetermined length of an amorphous alloy brazing member 2 on a base 1Ilt1 with an adhesive.

これを使用するには、アモルファス合金ろう何部２を台
紙１よりはがし、これを第２図に示すように、挿入銅管
４の端部に巻き付けて銅管３の端部に挿入し、加熱ろう
付する。To use this, peel off the amorphous alloy wax part 2 from the mount 1, wrap it around the end of the inserted copper tube 4, insert it into the end of the copper tube 3, and heat it. Braze.

なお、この場合、ろう付（づ箔は鋼管の端部よりやや突
出するよう巻きイ」けるのが望ましい。In this case, it is desirable to wrap the brazing foil so that it slightly protrudes from the end of the steel pipe.

又、第３図に示すように銅管３の端部内側面にアモルフ
ァス合金ろう角部２を貼付（−ノ、そこへ銅管４の端部
を挿入して、加熱ろう付する。なお、アモルファス合金
ろう角（Ｊ箔は銅管３．４の双方に貼付（ノ、これを加
熱ろう付けしてもよい。Further, as shown in FIG. 3, an amorphous alloy brazing corner 2 is pasted on the inner surface of the end of the copper tube 3 (-), and the end of the copper tube 4 is inserted there and heat brazed. Alloy solder angle (J foil may be pasted on both sides of the copper tube 3.4) (this may be heated and brazed.

アモルファス合金ろう角部２の大きさは、予め接合すべ
き鋼管の寸法に応じた適正寸法を決めて、数種類の大ぎ
さのものを用意しておき、その中から１つあるいは組合
せて選択して使用すればよい。For the size of the amorphous alloy brazing corner 2, determine the appropriate size in advance according to the dimensions of the steel pipes to be joined, prepare several sizes, and select one or a combination of them. Just use it.

効　果 本発明に用いるろう月はアモルファス構造であるため流
動性が良好で、又ろうイ」け中の溶【プ分れ現象がほと
んど起きない。したがって、鋼管接合部のみがき作業や
スラックス塗布が不要となり、従来の必須工程が省略で
き、フラックスの忘れによる製品不良もなくなる。Effects Since the wax used in the present invention has an amorphous structure, it has good fluidity, and the phenomenon of melting and separation during waxing hardly occurs. Therefore, there is no need to polish or apply slack to the joints of the steel pipes, thereby eliminating the conventional necessary steps and eliminating product defects due to forgetting to apply flux.

本発明に用いるろう何部は柔軟性に富んでおり接着性が
あるから、接合部に凹凸形状があってもろう材はその凹
凸形状に合せて変形し、各部均等に置ろうすることがで
きるので、均質な接合部が得られる。さらに接合部に多
少すき間がある場合でも、ろう材の重ね置が可能である
から、十分に接合が可能である。The solder parts used in the present invention are highly flexible and have adhesive properties, so even if the joint has an uneven shape, the brazing material deforms to match the uneven shape and can be placed evenly on each part. Therefore, a homogeneous joint can be obtained. Furthermore, even if there is some gap at the joint, the brazing filler metal can be stacked one on top of the other, so that sufficient joining is possible.

そして、剥離紙型のろう材とした場合は、一定量のろう
材を簡単に接合部に適用することができる。When a release paper type brazing material is used, a certain amount of the brazing material can be easily applied to the joint portion.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の実施に用いるろう何部の一例の斜視図
、第２図および第３図は本発明の実施の態様の説明する
ための正面図である。 １・・・台紙、２・・・アモルファス合金ろう何部、３
・・・銅管、４・・・銅管。 ５− オ　１　図 才２図 ３１１FIG. 1 is a perspective view of an example of a wax part used in carrying out the present invention, and FIGS. 2 and 3 are front views for explaining an embodiment of the present invention. 1... Mounting paper, 2... How many parts of amorphous alloy wax, 3
...Copper pipe, 4...Copper pipe. 5- O 1 Figure 2 Figure 311

Claims (1)

【特許請求の範囲】[Claims] （１）　相互に接続すべき鋼管の少なくとも一方の端部
にアモルファス合金ろう付箔を被着して、鋼管を相互に
接続し、加熱接合することを特徴とする銅管のろう付は
方法。(1) A method for brazing copper pipes, which comprises applying an amorphous alloy brazing foil to at least one end of the steel pipes to be connected to each other, and then connecting the steel pipes to each other and joining them by heating.