JPS6219941B2 - - Google Patents
Info
- Publication number
- JPS6219941B2 JPS6219941B2 JP54098623A JP9862379A JPS6219941B2 JP S6219941 B2 JPS6219941 B2 JP S6219941B2 JP 54098623 A JP54098623 A JP 54098623A JP 9862379 A JP9862379 A JP 9862379A JP S6219941 B2 JPS6219941 B2 JP S6219941B2
- Authority
- JP
- Japan
- Prior art keywords
- joint
- stainless steel
- soft
- overhang
- soft soldering
- 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
Links
- 239000010935 stainless steel Substances 0.000 claims description 56
- 229910001220 stainless steel Inorganic materials 0.000 claims description 56
- 238000005476 soldering Methods 0.000 claims description 47
- 238000000034 method Methods 0.000 claims description 27
- 238000005219 brazing Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 7
- 229910000679 solder Inorganic materials 0.000 description 30
- 238000010438 heat treatment Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000000945 filler Substances 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 6
- 239000011800 void material Substances 0.000 description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/14—Soldering, e.g. brazing, or unsoldering specially adapted for soldering seams
- B23K1/18—Soldering, e.g. brazing, or unsoldering specially adapted for soldering seams circumferential seams, e.g. of shells
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Description
【発明の詳細な説明】
本発明はステンレス鋼管を接合する際に、ステ
ンレス鋼管又はステンレス鋼製継手の接合部外管
の中央部付近にリング状の張出し部を設けると共
に該張出し部に小孔を穿設し、該張出し部の内側
に予め軟ろう材をリング状に嵌合しておいて、置
ろう方式によつて軟ろう接を行なう置ろう方式に
よるステンレス鋼管の軟ろう接方法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION When joining stainless steel pipes, the present invention provides a ring-shaped overhang near the center of the joint outer tube of the stainless steel pipe or stainless steel joint, and a small hole is formed in the overhang. This relates to a method for soft soldering stainless steel pipes using a brazing method, in which a soft soldering material is fitted into a ring shape inside the overhang in advance, and soft soldering is performed by a brazing method. be.
従来、ステンレス鋼管をステンレス鋼製継手な
どを介してはんだ合金などの軟ろうを用いて軟ろ
う接を行なう一つの方法として置ろう方式による
軟ろう接方法が行なわれているが、従来の置ろう
方式による軟ろう接方法には次のような欠点があ
つた。 Conventionally, soft soldering has been used as a method of soft soldering stainless steel pipes using soft solder such as solder alloy through stainless steel fittings. This method of soft soldering has the following drawbacks.
(1) 置ろうされた軟ろうとステンレス鋼製継手と
の接触が不均一であると、加熱の際に軟ろうが
局部的に溶融し、未溶融部分が加熱中に脱落す
る。(1) If the contact between the placed soft solder and the stainless steel joint is uneven, the soft solder will melt locally during heating, and the unmelted portion will fall off during heating.
(2) 軟ろうを接合部の下端に置いた場合、ステン
レス鋼管の先端部がステンレス鋼製継手の奥ま
で充分に入らず、ろう材の太さだけ浮き上つた
状態となり、特に立て姿勢の配管の場合ではろ
う材の溶融によつてステンレス鋼管とステンレ
ス鋼製継手とが相対的に移動して接合部に欠陥
が生じやすい。(2) If soft solder is placed at the bottom end of the joint, the tip of the stainless steel pipe will not go deep enough into the stainless steel joint, and the thickness of the solder metal will rise up, especially when the pipe is in an upright position. In this case, the stainless steel pipe and the stainless steel joint move relative to each other due to the melting of the brazing filler metal, which tends to cause defects in the joint.
そこで、これらの欠点を解消するために、継手
の接合部外管の中央部付近に内面側から外側に向
つて周方向に張り出したリング状の張出し部を設
け、この張出し部の内側に予め軟ろう材をリング
状に嵌合した継手を用いて軟ろう接を行なう方法
が銅管などの軟ろう接に一部採用されている。第
４図はその従来の方法で軟ろう接する前の状態を
示す接合部の断面図、第５図は従来の方法でステ
ンレス鋼管とステンレス鋼製継手との軟ろう接を
行なつた場合の接合後の接合部を展開した展開図
である。図面中、ａは継手の接合部外管、ｂは接
合部外管ａに挿入して接合するパイプの先端部の
接合部内管、ｃは接合部外管ａの中央部付近に内
面側から外側に向つて周方向に張り出しているリ
ング状の張出し部、ｄは張出し部ｃの内側に予め
嵌合したリング状の軟ろう材、ｅは接合部外管ａ
の内周面と接合部内管ｂの外周面との間に形成さ
れた隙間、ｆは軟ろう接することにより接合部に
均一に充填された軟ろう、ｇは軟ろう接時に発生
したボイドである。 Therefore, in order to eliminate these drawbacks, a ring-shaped overhang that extends circumferentially from the inner surface to the outside is provided near the center of the outer pipe of the joint, and the inside of this overhang is pre-softened. A method of performing soft soldering using a joint in which a filler metal is fitted in a ring shape is partially adopted for soft soldering of copper pipes and the like. Figure 4 is a cross-sectional view of the joint before soft soldering using the conventional method, and Figure 5 shows the joint between a stainless steel pipe and a stainless steel fitting when soft soldering is performed using the conventional method. It is a developed view of a later joint. In the drawings, a is the joint outer pipe of the joint, b is the joint inner pipe at the tip of the pipe that is inserted into the joint outer pipe a, and c is the joint from the inner side to the outside near the center of the joint outer pipe a. d is a ring-shaped soft solder material fitted in advance inside the overhang part c, and e is a joint outer tube a.
The gap formed between the inner circumferential surface of and the outer circumferential surface of the joint inner tube b, f is the soft solder uniformly filled in the joint by soft soldering, and g is the void generated during soft soldering. .
ところが、このような方法をそのままステンレ
ス鋼管の軟ろう接に適用した場合には次のような
欠点が生ずる。 However, when such a method is directly applied to soft soldering of stainless steel pipes, the following drawbacks occur.
すなわち、一般にステンレス鋼管の軟ろう接に
用いられているフラツクスはステンレス鋼の持つ
耐食性を損わないために、リン酸及びリン酸塩を
主成分とするフラツクスが用いられており、この
フラツクスは軟ろう接に際して多量にガスが発生
する。また軟ろう接時の加熱中にフラツクス残渣
と軟ろうとが充分置換して良好な軟ろう接合を得
るために接合部外管ａの内周面と接合部内管ｂの
外周面との間に形成される隙間ｅは銅管などの場
合よりも大きくなつており、必然的に予め嵌合す
る軟ろう材ｄの量も多量になつている。 In other words, fluxes that are generally used for soft soldering stainless steel pipes are mainly composed of phosphoric acid and phosphates in order not to impair the corrosion resistance of stainless steel. A large amount of gas is generated during soldering. In addition, during heating during soft soldering, the flux residue and soft solder are sufficiently replaced to obtain a good soft soldering joint, so that the flux is formed between the inner circumferential surface of the joint outer tube a and the outer circumferential surface of the joint inner tube b. The gap e created is larger than in the case of copper pipes, and the amount of soft brazing filler metal d that is fitted in advance is also necessarily large.
したがつて、ステンレス鋼管を軟ろう接する
と、
(1) 軟ろう接時に発生するガスの量が多量であ
り、この多量のガスが隙間ｅから流出するた
め、ガスによつて軟ろうが隙間ｅに充分充填さ
れない。 Therefore, when stainless steel pipes are soft soldered, (1) A large amount of gas is generated during soft soldering, and this large amount of gas flows out from the gap e, so the gas causes the soft solder to close the gap e. is not filled sufficiently.
(2) 冷却時にステンレス鋼製継手の接合部外管ａ
の中央部に設けられた張出し部ｃ内が負圧とな
り外部から隙間ｅを通つて空気を吸引するた
め、そこに空気の通路ができる。(2) Joint outer pipe a of stainless steel joint during cooling
Since the inside of the overhang c provided at the center of the overhang becomes negative pressure and air is sucked in from the outside through the gap e, an air passage is created there.
などの原因により、軟ろう接後の接合部には第５
図に示す如く、巨大ボイドｈが生じて接合が不充
分になるなどの欠点が生ずる。Due to reasons such as this, there is a fifth
As shown in the figure, a large void h is generated, resulting in defects such as insufficient bonding.
本発明はこのような欠点を解決したものであ
り、ステンレス鋼管を接合する際に、ステンレス
鋼管又はステンレス鋼製継手の接合部外管の中央
部付近に内面側から外側に向つて周方向に張り出
したリング状の張出し部を設けると共に、張出し
部にガス又は空気が通過する直径が1.0〜1.5mmの
小孔を貫通穿設し、張出し部の内側に予め軟ろう
材をリング状に嵌合しておいて、置ろう式によつ
て軟ろう接を行ない、軟ろう接時に発生するガス
を小孔より外部に放出せしめ、冷却時に張出し部
が負圧となると外部の空気を小孔から流入させて
気密性の良好な接合部を得ることができる置ろう
方式によるステンレス鋼管の軟ろう接方法を提供
するものである。 The present invention solves these drawbacks, and when joining stainless steel pipes, a joint part of the stainless steel pipes or stainless steel joints is provided near the center of the outer pipe that overhangs in the circumferential direction from the inner surface to the outside. In addition to providing a ring-shaped overhang, a small hole with a diameter of 1.0 to 1.5 mm through which gas or air passes is drilled through the overhang, and a soft filler metal is fitted in a ring shape to the inside of the overhang. Then, soft soldering is performed using the placing brazing method, and the gas generated during soft soldering is released to the outside through the small hole, and when the overhang part becomes negative pressure during cooling, external air is allowed to flow in through the small hole. The present invention provides a soft soldering method for stainless steel pipes using a brazing method, which allows a joint with good airtightness to be obtained.
すなわち、本発明はステンレス鋼管又はステン
レス鋼製継手の接合部外管の中央部付近に内面側
から外側に向つて周方向に張り出したリング状の
張出し部を設けると共に、該張出し部の頂点付近
に張出し部を貫通する直径が1.0〜1.5mmの小孔を
１個若しくは複数個穿設し、該張出し部の内側に
予め軟ろう材をリング状に嵌合しておいて、該接
合部外管に接合するステンレス鋼管の先端部の接
合部内管を挿入して置ろう方式によつて軟ろう接
を行なうことを特徴とする置ろう方式によるステ
ンレス鋼管の軟ろう接方法に関するものである。 That is, the present invention provides a ring-shaped overhang that extends in the circumferential direction from the inner surface to the outside near the center of the joint outer tube of a stainless steel pipe or a stainless steel joint, and near the apex of the overhang. One or more small holes with a diameter of 1.0 to 1.5 mm are drilled through the overhang, and a soft filler metal is fitted in a ring shape inside the overhang beforehand. The present invention relates to a soft soldering method for stainless steel pipes using a brazing method, characterized in that soft soldering is performed by inserting an inner pipe of a joint portion at the tip of a stainless steel pipe to be joined to a pipe.
以下、図面により本発明に係る置ろう方式によ
るステンレス鋼管の軟ろう接方法について詳細に
説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a soft soldering method for stainless steel pipes using a soldering method according to the present invention will be described in detail with reference to the drawings.
第１図は本発明方法でステンレス鋼管を軟ろう
接する状態の１実施例を示す接合部の正面図、第
２図は第１図のＡ−Ａ線断面図、第３図は本発明
方法でステンレス鋼管を軟ろう接した場合の接合
後の接合部を展開した展開図である。 Fig. 1 is a front view of a joint showing an example of soft soldering stainless steel pipes by the method of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. FIG. 2 is a developed view of a joint after joining stainless steel pipes by soft soldering.
図面中、１は接合する一方のステンレス鋼管の
先端部を他方のステンレス鋼管の先端部に挿入す
るために、他方のステンレス鋼管の先端部を拡管
した接合部外管又はステンレス鋼管を接合する継
手の両端部が拡管加工されているステンレス鋼製
継手の接合部外管である。２は接合部外管１に挿
入して接合するステンレス鋼管の先端部の接合部
内管、３は接合部外管１の中央部付近に内面側か
ら外側に向つて周方向に張り出す如く設けたリン
グ状の張出し部、４は張出し部３の頂点付近に張
出し部３を貫通して１個若しくは複数個穿設した
ガス又は空気が通過する小孔であり、この小孔４
の直径は1.0〜1.5mmである。５は張出し部３の内
側にリング状に嵌合した軟ろう材、６は接合部外
管１の内周面と接合部内管２の外周面との間に形
成された隙間、７は軟ろう接することにより接合
部に均一に充填された軟ろう、８は軟ろう接時に
発生したボイドである。 In the drawings, 1 indicates a joint outer pipe in which the tip of one stainless steel pipe to be joined is expanded in order to insert the tip of the other stainless steel pipe into the other stainless steel pipe, or a joint for joining stainless steel pipes. This is the joint outer tube of a stainless steel joint that has been expanded at both ends. Reference numeral 2 denotes a joint inner pipe at the tip of a stainless steel pipe to be inserted into and joined to the joint outer pipe 1, and 3 is provided near the center of the joint outer pipe 1 so as to project from the inner surface toward the outside in the circumferential direction. The ring-shaped projecting portion 4 is one or more small holes formed near the apex of the projecting portion 3 through the projecting portion 3 through which gas or air passes.
The diameter is 1.0-1.5mm. 5 is a soft solder material fitted in a ring shape inside the overhanging portion 3; 6 is a gap formed between the inner peripheral surface of the joint outer tube 1 and the outer peripheral surface of the joint inner tube 2; 7 is a soft solder material. The soft solder is uniformly filled in the joint by contacting the joints, and 8 is a void generated during soft soldering.
本発明方法は上記の如く、接合部外管１の中央
部付近に内面側から外側に向つて周方向に張り出
したリング状の張出し部３を設けると共に、張出
し部３の頂点付近にガス又は空気が通過する小孔
４を１個若しくは複数個穿設し、この張出し部３
の内側に予め軟ろう材５をリング状に嵌合してお
いて、接合部外管１に接合部内管２を挿入して置
ろう方式によつてステンレス鋼管の軟ろう接を行
なう方法であり、軟ろう接時の加熱中に発生した
接合部内部のガスは小孔４から外部に容易に放出
されると共に、冷却時に張出し部３内が負圧とな
ると小孔４を経て空気が外部から吹い込まれるた
め、接合部内管に巨大ボイドの発生するのが防止
されるので気密性の良好な軟ろう接を行なうこと
が可能である。 As described above, the method of the present invention provides a ring-shaped overhang 3 that extends circumferentially from the inner surface toward the outside near the center of the joint outer tube 1, and provides gas or air in the vicinity of the apex of the overhang 3. One or more small holes 4 are bored through which the overhang 3 passes.
This is a method of soft soldering stainless steel pipes by fitting a soft solder metal 5 in a ring shape inside the pipe in advance and inserting the joint inner pipe 2 into the joint outer pipe 1. Gas generated inside the joint during heating during soft soldering is easily released to the outside from the small hole 4, and when the inside of the overhang 3 becomes negative pressure during cooling, air is released from the outside through the small hole 4. Since it is blown in, the generation of large voids in the inner tube of the joint is prevented, making it possible to perform soft soldering with good airtightness.
次に実施例により本発明方法を具体的に説明す
る。 Next, the method of the present invention will be specifically explained with reference to Examples.
実施例 １
第１図及び第２図に示す如き内径22.35mmの
SUS304ステンレス鋼製のろう接用継手の接合部
外管１の中央部付近にリング状の張出し部３を設
けると共に、張出し部３の頂点付近に直径1.5mm
の小孔４を１個穿設した後、張出し部３の内側に
Sn50重量％、Pb50重量％より成るはんだをリン
グ状に嵌合して、この接合部外管１に外径22.0mm
のSUS304ステンレス鋼管の接合部内管２を挿入
し、接合部外管１の内周面と接合部内管２の外周
面との間に形成された隙間６にリン酸とリン酸ア
ンモン系溶剤とより成る基剤にSn50重量％、
Pb50重量％より成るはんだ粉末を基剤に対して
50重量％添加混合したクリーム状混合物を充填し
た後、予め加熱した均一加熱体により接合部を周
囲から加熱し、一定時間経過して張出し部３の内
側に嵌合されているはんだが溶融して接合部に均
一に拡散充填されたことを確認してから加熱を止
め、接合部を冷却することによりはんだ接合を完
了した。Example 1 An inner diameter of 22.35 mm as shown in Figures 1 and 2.
A ring-shaped overhang 3 is provided near the center of the joint outer tube 1 of a brazing joint made of SUS304 stainless steel, and a diameter of 1.5 mm is provided near the apex of the overhang 3.
After drilling one small hole 4, inside the overhang 3,
Solder consisting of 50% Sn and 50% Pb is fitted in a ring shape, and the outer diameter is 22.0 mm at this joint outer tube 1.
Insert the joint inner tube 2 of the SUS304 stainless steel pipe, and apply phosphoric acid and ammonium phosphate solvent to the gap 6 formed between the inner peripheral surface of the joint outer tube 1 and the outer peripheral surface of the joint inner tube 2. The base consists of 50% Sn by weight,
Solder powder consisting of 50% Pb by weight as base material
After filling the creamy mixture with 50% by weight added, the joint is heated from the surrounding area using a uniform heating element heated in advance, and after a certain period of time, the solder fitted inside the overhang part 3 melts. After confirming that the solder was uniformly diffused and filled into the joint, heating was stopped and the joint was cooled to complete the solder joint.
はんだ接合完了後、接合部分に対して20Kg／cm2
の水圧試験を行なつたところ、水洩れは全く認め
られず、また接合部を剥離して検査したところ、
第３図に示すようにはんだが充分に拡散充填され
ていることが確認された。 After completing the solder joint, 20Kg/cm 2 for the joint area
When we conducted a water pressure test, no water leakage was observed, and when we peeled off the joints and inspected them, we found that
As shown in FIG. 3, it was confirmed that the solder was sufficiently diffused and filled.
実施例 ２
実施例１と同様のステンレス鋼製継手及びステ
ンレス鋼管を用い、張出し部３の内側に実施例１
と同様のはんだを嵌合し、ステンレス鋼製継手に
挿入したステンレス鋼管の接合部内管２の外周面
とステンレス鋼製継手の接合部外管１の内周面と
の間の隙間６に実施例１と同様の基剤にはんだ粉
末を混合したクリーム状混合物を充填した後、ガ
ソリントーチを用いて接合部の周囲を均一に加熱
して接合部外管１のとばぐちに充分はんだが回つ
ていることを確認してから加熱を止め、接合部を
冷却してはんだ接合を完了した。Example 2 Using the same stainless steel fitting and stainless steel pipe as in Example 1, Example 1 was installed inside the overhang 3.
In this embodiment, a similar solder is fitted to the gap 6 between the outer peripheral surface of the joint inner pipe 2 of the stainless steel pipe inserted into the stainless steel joint and the inner peripheral surface of the joint outer pipe 1 of the stainless steel joint. After filling the same base as in 1 with a creamy mixture mixed with solder powder, use a gasoline torch to uniformly heat the area around the joint so that the solder is sufficiently spread around the edges of the joint outer tube 1. After confirming that the soldering was complete, the heating was stopped, the joint was cooled, and the soldering was completed.
はんだ接合を完了後、実施例１と同様の検査を
行なつたところ、接合部に水洩れが全くなく、ま
た接合部にはんだが充分に拡散充填されているこ
とが確認された。 After completing the solder bonding, the same inspection as in Example 1 was conducted, and it was confirmed that there was no water leakage at all in the bonded area and that the solder was sufficiently diffused and filled in the bonded area.
なお、はんだの流出は作業姿勢の如何を問わず
ほとんど認められなかつた。 Incidentally, almost no solder leakage was observed regardless of the working posture.
以上詳述した如く、本発明に係る置ろう方式に
よるステンレス鋼管の軟ろう接方法はステンレス
鋼管又はステンレス鋼製継手の接合部外管１にリ
ング状の張出し部３を設けると共に、張出し部３
に直径が1.0〜1.5mmの小孔４を穿設し、この張出
し部３の内側に予め軟ろう材５をリング状に嵌合
しておいて、接合部外管１に接合部内管２を挿入
して置ろう方式によつて軟ろう接を行なう方法で
あり、軟ろう接時の加熱中に発生したガスは張出
し部３の小孔４から外部に容易に放出され、冷却
時には外部の空気が小孔４から吹い込まれるの
で、接合部内部に巨大ボイドが発生するを防止さ
れ、気密性の良好な軟ろう接を行なつたことがで
きるので、従来の方法に比し気密性が格段に向上
するなどの優れた利点を有しているばかりでな
く、その方法は簡単で未熟練者でも容易に軟ろう
接合作業を行なうことができるなどの優れた利点
を有しており、また本発明方法はステンレス鋼管
の軟ろう接に適用できるばかりでなく、銅管ある
いはその他のパイプを軟ろう接する場合にも適用
することが可能であり、その工業的価値は大きな
ものがある。 As described in detail above, in the soft soldering method for stainless steel pipes using the brazing method according to the present invention, a ring-shaped overhanging portion 3 is provided on the joint outer tube 1 of a stainless steel pipe or a stainless steel joint, and the overhanging portion 3 is
A small hole 4 with a diameter of 1.0 to 1.5 mm is bored in the bulge, a soft filler metal 5 is fitted in a ring shape inside this overhang 3, and the inner pipe 2 of the joint part is attached to the outer pipe 1 of the joint part. This method performs soft soldering by inserting and placing it, and the gas generated during heating during soft soldering is easily released to the outside from the small hole 4 of the overhang 3, and when cooling, the gas is released from the outside air. Since it is blown into the small hole 4, it is possible to prevent large voids from forming inside the joint, and it is possible to perform soft soldering with good airtightness, so the airtightness is much higher than with conventional methods. This method not only has excellent advantages such as improved performance, but also has excellent advantages such as the method is simple and even unskilled people can easily perform soft soldering work. The method of the invention can be applied not only to soft soldering of stainless steel pipes, but also to soft soldering of copper pipes or other pipes, and has great industrial value.
第１図は本発明方法でステンレス鋼管を軟ろう
接する状態の１実施例を示す接合部の正面図、第
２図は第１図のＡ−Ａ線断面図、第３図は本発明
方法でステンレス鋼管を軟ろう接した場合の接合
後の接合部を展開した展開図、第４図は従来の方
法で軟ろう接する状態を示す接合部の断面図、第
５図は従来の方法でステンレス鋼管とステンレス
鋼製継手との軟ろう接を行なつた場合の接合後の
接合部を展開した展開図である。
１……接合部外管、２……接合部内管、３……
張出し部、４……小孔、５……軟ろう材、６……
隙間、７……軟ろう、８……ボイド、ａ……接合
部外管、ｂ……接合部内管、ｃ……張出し部、ｄ
……軟ろう材、ｅ……隙間、ｆ……軟ろう、ｇ…
…ボイド、ｈ……巨大ボイド。
Fig. 1 is a front view of a joint showing an example of soft soldering stainless steel pipes by the method of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. Figure 4 is a cross-sectional view of the joint after soft soldering of stainless steel pipes. Figure 5 is a cross-sectional view of the joint after soft soldering of stainless steel pipes. Figure 5 is a cross-sectional view of the joint after soft soldering of stainless steel pipes. FIG. 3 is a developed view of the joint after soft soldering is performed between the stainless steel joint and the stainless steel joint. 1... Junction outer pipe, 2... Junction inner pipe, 3...
Overhanging portion, 4...Small hole, 5...Soft brazing material, 6...
Gap, 7...Soft solder, 8...Void, a...Joint outer tube, b...Joint inner tube, c...Overhang, d
... Soft solder, e... Gap, f... Soft solder, g...
...Void, h...huge void.
Claims (1)
合部外管１の中央部付近に内面側から外側に向つ
て周方向に張り出したリング状の張り出部３を設
けると共に、該張出し部３の頂点付近に張出し部
３を貫通する直径が1.0〜1.5mmの小孔４を１個若
しくは複数個穿設し、該張出し部３の内側に予め
軟ろう材５をリング状に嵌合しておいて、該接合
部内管２を挿入して置ろう方式によつて軟ろう接
を行なうことを特徴とする置ろう方式によるステ
ンレス鋼管の軟ろう接方法。1. A ring-shaped overhang 3 is provided near the center of the joint outer tube 1 of a stainless steel pipe or a stainless steel joint, and a ring-shaped overhang 3 is provided that overhangs in the circumferential direction from the inner surface to the outside. One or more small holes 4 with a diameter of 1.0 to 1.5 mm are drilled through the overhang 3, and a soft brazing material 5 is fitted in a ring shape inside the overhang 3 in advance. A method for soft soldering stainless steel pipes using a brazing method, characterized in that soft soldering is performed by inserting an inner pipe 2 in a joint part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9862379A JPS5623372A (en) | 1979-08-03 | 1979-08-03 | Soft soldering method of stainless steel pipe by preplaced filler metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9862379A JPS5623372A (en) | 1979-08-03 | 1979-08-03 | Soft soldering method of stainless steel pipe by preplaced filler metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5623372A JPS5623372A (en) | 1981-03-05 |
| JPS6219941B2 true JPS6219941B2 (en) | 1987-05-01 |
Family
ID=14224662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9862379A Granted JPS5623372A (en) | 1979-08-03 | 1979-08-03 | Soft soldering method of stainless steel pipe by preplaced filler metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5623372A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61172686U (en) * | 1985-04-09 | 1986-10-27 | ||
| DE3536296C1 (en) * | 1985-10-11 | 1987-03-26 | Supervis Ets | camshaft |
| JPS63165068A (en) * | 1986-12-26 | 1988-07-08 | Japan Steel Works Ltd:The | Joined body of metal plate and base body |
| JPH0739032B2 (en) * | 1991-04-04 | 1995-05-01 | 昭和アルミニウム株式会社 | Brazing method for metal materials |
| JP7362219B2 (en) * | 2020-03-12 | 2023-10-17 | ダイハツ工業株式会社 | Tube fixed support structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5429313Y2 (en) * | 1976-05-01 | 1979-09-18 |
-
1979
- 1979-08-03 JP JP9862379A patent/JPS5623372A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5623372A (en) | 1981-03-05 |
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