JP2928737B2 - Butt welding method for thin-walled pipes - Google Patents

Butt welding method for thin-walled pipes

Info

Publication number
JP2928737B2
JP2928737B2 JP33447694A JP33447694A JP2928737B2 JP 2928737 B2 JP2928737 B2 JP 2928737B2 JP 33447694 A JP33447694 A JP 33447694A JP 33447694 A JP33447694 A JP 33447694A JP 2928737 B2 JP2928737 B2 JP 2928737B2
Authority
JP
Japan
Prior art keywords
welding
tapered
thin
butt
pipe
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 - Lifetime
Application number
JP33447694A
Other languages
Japanese (ja)
Other versions
JPH08168881A (en
Inventor
久 海野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sankei Giken Kogyo Co Ltd
Original Assignee
Sankei Giken Kogyo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sankei Giken Kogyo Co Ltd filed Critical Sankei Giken Kogyo Co Ltd
Priority to JP33447694A priority Critical patent/JP2928737B2/en
Publication of JPH08168881A publication Critical patent/JPH08168881A/en
Application granted granted Critical
Publication of JP2928737B2 publication Critical patent/JP2928737B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Butt Welding And Welding Of Specific Article (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、太陽熱温水器の集熱
管、保温瓶の内筒、液状食品用容器、液状食品製造機に
おける配管、あるいは原子力発電装置における配管等の
ように、内部を液体が流れる、または内部に液体を溜め
る特に薄肉の管、あるいはキャップないしカップ形部材
の各開口端相互、また、その管とキャップないしカップ
形部材の開口端相互のアーク溶接による突合せ溶接方法
に関する。
BACKGROUND OF THE INVENTION The present invention relates to a liquid collector such as a heat collecting pipe of a solar water heater, an inner cylinder of a heat retaining bottle, a container for a liquid food, a pipe in a liquid food manufacturing machine, or a pipe in a nuclear power plant. Particularly, the present invention relates to a butt welding method using arc welding between a pipe having a thin wall or a cap or a cup-shaped member, and a pipe or a cap or a cup-shaped member.

【0002】[0002]

【従来の技術】薄肉管は一般に電縫管であり、その関係
で市販の薄肉管の端面は、真円度・直径・平面度等にば
らつきがあり、また、ねじれ等による変形もあるためき
わめて精度が悪い。したがって、その薄肉管の端面相互
を単に突き合わせただけでは端面が密着せず、そのまま
の状態で溶接すると、焼け抜け穴、溶け込み穴等と称す
る小穴が溶接部分に発生するなどして溶接部分の気密性
に問題がある。上記薄肉管の端面にキャップないしカッ
プ形部材を突き合わせ溶接して管端を閉じる場合にも、
そのキャップないしカップ形部材はプレス成形したもの
であるから、薄肉管どうしの突き合わせ溶接と同様に、
キャップないしカップ形部材の端面の精度不良が原因の
問題を生じる。
2. Description of the Related Art Thin-walled pipes are generally electric resistance welded pipes, and the end faces of commercially available thin-walled pipes vary in roundness, diameter, flatness, and the like, and are extremely deformed due to torsion and the like. Poor accuracy. Therefore, if the end faces of the thin-walled pipes are simply butted together, the end faces do not adhere to each other. There is a problem. Even when closing the pipe end by butt welding a cap or cup-shaped member to the end face of the thin-walled pipe,
Since the cap or cup-shaped member is press-formed, like butt welding thin tubes,
Problems arise due to poor accuracy of the end faces of the cap or cup-shaped member.

【0003】そこで薄肉管等を突合せ溶接する際は、い
んろう接ぎ手、フランジ接ぎ手、あるいはカラーを被せ
て開口端面の肉厚を増すなどの溶接設計が行われている
(例えば特開昭52ー48533号公報、特開昭52ー
48534号公報参照)。
Therefore, when butt-welding a thin-walled pipe or the like, a welding design such as increasing the thickness of an opening end face by covering it with a solder joint, a flange joint, or a collar has been performed (for example, Japanese Unexamined Patent Publication No. Sho 52). -48533, JP-A-52-48534).

【0004】[0004]

【発明が解決しようとする課題】開口端面の精度を良く
するためプレスで矯正する方法もあるが、高いプレス圧
を必要とし内部応力も大きいため、かえって真円度が悪
くなるばかりか管全体が変形してしまうことがある。食
品を流す管、あるいは食品を溜めるのに用いる有底筒等
の場合、食品衛生法等の関係でプレス加工油が使えない
ことがある。
There is a method of straightening with a press in order to improve the accuracy of the end face of the opening. However, since a high press pressure is required and the internal stress is large, not only the roundness is deteriorated but also the entire pipe is deteriorated. It may be deformed. In the case of a tube for flowing food or a bottomed cylinder used for storing food, press working oil may not be used due to the Food Sanitation Law and the like.

【0005】前記従来の溶接接ぎ手、特にいんろう接ぎ
手、フランジ接ぎ手によって薄肉管等を突合せ溶接した
場合、その接合部の内面に円周方向溝が生じるため、そ
の溝に液体中の不純物が沈着しやすくなり、また、水道
水の場合、その中に含まれる塩素が溝部分を通過する際
に濃縮されて隙間腐食が発生し、ついには母材に穴があ
くことがある。
When a thin-walled pipe or the like is butt-welded by the above-mentioned conventional welding joints, especially a stainless steel joint or a flange joint, a circumferential groove is formed on the inner surface of the joint, and impurities in the liquid are contained in the groove. In the case of tap water, chlorine contained in the tap water is concentrated when passing through the groove, causing crevice corrosion, and eventually a hole may be formed in the base material.

【0006】本発明は、薄肉管等の突合せ溶接における
上記従来の課題に鑑みて提案されたもので、高精度を保
って安定した突合せ溶接ができる溶接方法を提供するこ
とを目的とする。
The present invention has been proposed in view of the above-mentioned conventional problems in butt welding of thin-walled tubes and the like, and an object of the present invention is to provide a welding method capable of performing stable butt welding while maintaining high accuracy.

【0007】[0007]

【課題を解決するための手段】本発明による薄肉管等の
突合せ溶接方法は上記の目的を達成するために、突合せ
溶接する側の開口端にテーパ状のフレアリング加工を施
す工程、フレアリング加工した開口端の内方にテーパ心
型を挿入密着させて真円度を保持した状態で該テーパ心
型の周面の所定位置に形成した円周方向溝に対応して開
口端の外側からカッタにより管中心線と垂直に切断する
工程、フレアリング加工側の開口端同士を向かい合わせ
てフレアリング部分を各々テーパチャックでつかみ、開
口端面の真円度を保持した状態で開口端を突き合わせる
工程、開口端相互の接触を保持した状態で突合せ部を外
部から溶接する工程をその順に行うことを特徴とする。
Butt welding method of the thin tube or the like due to the problem-solving means for the invention in order to achieve the above object, the step of applying a flaring processed tapered at the opening end on the side of butt welding, flaring processed Tapered center inside the open end
The taper core is inserted with the mold in close contact with the mold to maintain roundness.
Open corresponding to the circumferential groove formed at a predetermined position on the peripheral surface of the mold.
Step by the outer cutter to cut the vertical tube centerline of the mouth end, each gripping a tapered chuck flaring portion facing the open end between the flaring processed end, while holding the roundness of the opening end face The step of butting the open ends and the step of welding the butted portions from the outside while maintaining mutual contact between the open ends are performed in this order.

【0008】なお上記開口端のフレアリング加工は、
えばテーパ穴を持ったダイス型と、複数個の遊転ローラ
を外周面に配設した回転エキスパンダとで行う。また上
記テーパチャックは上記フレアリング部分と同じ斜度の
つかみ面を有する割型チャックを用いるとよく、またそ
のテーパチャックを溶接時の電極に兼用させることもで
きる。
[0008] Note flaring machining of the opening end, example
For example, a die having a tapered hole and a rotary expander having a plurality of idler rollers disposed on the outer peripheral surface are used. Also above
The taper chuck has the same gradient as the flare
It is recommended to use a split chuck with a gripping surface.
Can also be used as an electrode during welding.
Wear.

【0009】[0009]

【作用】上記のようにフレアリング加工を施すことによ
って突合せ溶接する開口端がテーパ状に広がると共に、
その開口端面の真円度並びに直径のばらつきが矯正され
る。又そのフレアリング加工した開口端の内方にテーパ
心型を挿入密着させて真円度を保持した状態で該テーパ
心型の周面の所定位置に形成した円周方向溝に対応して
開口端の外側からカッタにより管中心線と垂直に切断す
ることによってテーパ状に広がった開口端面が真円度を
保持した状態で開口径が一定寸法の平面状に切り揃え
れる。次いで、フレアリング加工側の開口端同士を向か
い合わせてフレアリング部分を各々テーパチャックでつ
かみ、開口端面の真円度を保持した状態で開口端を突き
合わせることによって、その開口端面相互は、各々真円
度を保ち且つ開口径が同一であるので正確に合致し、少
しの隙間もなく密着した状態で突き合わせられる。その
突合せ状態で管の外側から溶接することによって、良好
かつ確実に接合することが可能となる
The flaring process is performed as described above.
The opening end to be butt-welded expands in a tapered shape,
The roundness and diameter variation of the opening end face are corrected.
You. Also tapered inward of the flared opening end
Insert the core into close contact with the taper while maintaining roundness.
Corresponding to the circumferential groove formed at a predetermined position on the peripheral surface of the core
Cut perpendicular to the pipe center line with a cutter from outside the open end
Opening end face spread tapered opening diameter while holding the roundness is trimmed et <br/> the planar predetermined dimensions by Rukoto. Next, face the open ends on the flaring side
Attach the flaring parts with taper chucks
And open the end of the opening while maintaining the roundness of the opening end.
By combining, the opening end surface each other, exactly match because each and opening diameter roundness coercive Chi are identical, are butted in close contact without any gap. By welding from the outside of the pipe in the butt condition , good
And it becomes possible to join reliably .

【0010】[0010]

【実施例】本発明に係る薄肉管等の突合せ溶接方法は、
(1)突合せ溶接する側の開口端のフレアリング加工、
(2)フレアリング加工した開口端の端面の切りそろ
え、(3)フレアリング加工した開口端面どうしの突合
せ、(4)突合せ圧接しながら行う溶接の各工程を順に
行うものである。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
(1) Flaring of the open end on the side to be butt-welded,
Steps of (2) flattening the end face of the flared opening end, (3) butting the flared opening end faces, and (4) welding each time while performing butt-press welding are sequentially performed.

【0011】以下図面に基づいて本発明の溶接方法を管
どうしの溶接に実施した例を具体的に説明する。 (1)突合せ溶接する側の開口端のフレアリング加工 素材として使用する市販の薄肉管を調べてみると、例え
ば直径100mmの管で、その開口端の直径に購入ロッ
トにより1.5mmもばらつきがあることがある。そこ
で、市販薄肉管の突合せ溶接に当たっては開口端を矯正
する必要があるもので、通常20トンもの力を要してい
た従来のプレスによる開口端矯正に代えて、本発明は先
ず、エキスパンダと称されている管の口広げ工具(実開
昭56−65728号公報、実公平5−19154号公
報参照)を使用して開口端のフレアリング加工を行う。
An example in which the welding method of the present invention is applied to welding between pipes will be specifically described with reference to the drawings. (1) Flaring processing of the open end on the side to be butt-welded When examining a commercially available thin-walled pipe used as a material, for example, a pipe with a diameter of 100 mm has a variation of 1.5 mm in the diameter of the open end depending on the purchased lot. There may be. Therefore, in butt welding of commercially available thin-walled pipes, it is necessary to correct the open end, and instead of the conventional press which required 20 tons of force to correct the open end, the present invention firstly uses an expander. The opening end is flared by using a so-called pipe opening tool (see Japanese Utility Model Application Laid-Open Nos. 56-65728 and 5-19154).

【0012】図1はそのフレアリング加工の要領を示し
たもので、素材管1の突合せ溶接する側の開口端をダイ
ス型2のテーパ穴3に挿入支持させる。そのテーパ穴3
の斜度、すなわち、穴3の大径側の直径は{小径側の直
径+(2×管の肉厚)}程度に設定する。そしてダイス
型2の大口径側からエキスパンダ4を回転させながら素
材管1の中に挿入するもので、素材管1の開口端がダイ
ス型2に倣って押し広げられると同時に、真円度も矯正
される。エキスパンダ4は、その回転主体4Aのテーパ
周面に、複数個のローラ5、いわゆる円筒ころが遊転自
由に配設されている。したがって、管1に上記の加工に
よって生じる内部歪みが少ない。
FIG. 1 shows the procedure of the flaring process. The opening end of the material pipe 1 on the side to be butt-welded is inserted into and supported by the tapered hole 3 of the die 2. The tapered hole 3
, Ie, the diameter of the large diameter side of the hole 3 is set to about {the diameter of the small diameter side + (2 × wall thickness of the pipe)}. The expander 4 is inserted into the material pipe 1 while rotating the expander 4 from the large-diameter side of the die 2, and the open end of the material pipe 1 is pushed and expanded in accordance with the die 2, and at the same time, the roundness is also increased. Be corrected. The expander 4 has a plurality of rollers 5, so-called cylindrical rollers, which are freely rotatable around a tapered peripheral surface of a rotating main body 4 </ b> A. Therefore, the internal distortion generated in the pipe 1 by the above processing is small.

【0013】図2は、エキスパンダ4を後退させてダイ
ス型2から外した管1の端部を示したもので、開口端は
テーパ状(1A)に広がり、真円度も矯正されている
が、開口端のフレアリング加工に伴って、開口端面の肉
厚部分の端面1Bが拡大部分図に示すようにごく僅かで
はあるけれども傾斜している。このままでは確実な突合
せはできないので、次の工程で開口端面の平行度・平面
度を得る加工を行う。
FIG. 2 shows the end of the tube 1 removed from the die 2 by retracting the expander 4. The open end has a tapered shape (1A) and the roundness is also corrected. However, due to the flaring of the opening end, the end surface 1B of the thicker portion of the opening end surface is inclined, though slightly, as shown in the enlarged partial view. Since a reliable butting cannot be performed as it is, processing for obtaining the parallelism and flatness of the opening end face is performed in the next step.

【0014】(2)フレアリング加工した開口端の端面
の切りそろえ加工 図3のように、開口端のフレアリング部分1Aにテーパ
心型6を挿入密着させて開口端の端面の真円度を保持す
る。テーパ心型6の周面には円周方向溝6Aが形成され
ている。その円周方向溝6Aに対応して開口端の外側に
回転カッタ7が設置されている。真円度を保持した状態
で管1をテーパ心型6と一体に緩徐に回転させると同時
に、回転カッタ7を管1に向かって管1の中心線X−X
と垂直の方向に押し当てて管1を切断する。その際、円
周方向溝6Aが刃の逃げ溝として作用する。
(2) Flattening of the end face of the flared opening end As shown in FIG. 3, a tapered core 6 is inserted into and closely attached to the flaring portion 1A of the opening end to maintain the roundness of the end face of the opening end. I do. A circumferential groove 6A is formed on the peripheral surface of the tapered core 6. A rotary cutter 7 is provided outside the open end corresponding to the circumferential groove 6A. While maintaining the roundness, the pipe 1 is slowly rotated integrally with the tapered core 6, and at the same time, the rotary cutter 7 is moved toward the pipe 1 along the center line XX of the pipe 1.
Then, the tube 1 is cut in a direction perpendicular to the above. At this time, the circumferential groove 6A acts as a clearance groove for the blade.

【0015】図4は、テーパ心型6を抜いた管1の端部
を示したもので、フレアリング部分1Aの端面が切断さ
れたことによって、拡大部分図に示すように肉厚部分の
端面1Bが管1の中心線X−Xと垂直にそろっている。
FIG. 4 shows the end of the tube 1 from which the tapered core 6 has been removed. The end of the flaring portion 1A is cut off, so that the end of the thick portion is cut off as shown in the enlarged partial view. 1B is perpendicular to the center line XX of the tube 1.

【0016】(3)フレアリング加工した開口端面どう
しの突合せ工程 図5に示すように、上記(1)および(2)の工程を経
て開口端を広げ(フレアリング加工)、且つその端面を
切りそろえた開口端どうしを向かい合わせ、各管1のフ
レアリング部分1Aを、そのフレアリングのテーパと同
じ斜度のつかみ面を持った三つ割りを可とする割型テー
パチャック8でそれぞれつかむ。管1をテーパチャック
8でつかむことによってフレアリング部分1Aの特に開
口端面の真円度が保持される。この状態で両テーパチャ
ック8・8を相互に引き寄せることで開口端を突合せ
る。突合せられた管1・1の端面は、ずれることなく、
また、すき間なく接触する。
(3) Step of abutting the flared opening end surfaces As shown in FIG. 5, the opening end is widened (flaring processing) through the above steps (1) and (2), and the end surfaces are cut out. With the open ends facing each other, the flared portion 1A of each tube 1 is gripped by a split-type tapered chuck 8 having a grip surface having the same inclination as the tapered surface of the flaring and capable of being divided into three. By gripping the tube 1 with the tapered chuck 8, the roundness of the flared portion 1A, particularly the open end face, is maintained. In this state, the open ends are brought into abutment by pulling the tapered chucks 8.8 toward each other. The end faces of the butted pipes 1.1 are not shifted,
In addition, there is no contact.

【0017】(4)突合せ圧接しながら行う溶接工程 各テーパチャック8を更に締付けると、テーパ面の作用
で両管1・1が互いに相手方に向かって進出しようとし
て圧接させられ、各管の真円度の保持と同時に管どうし
の密着が確実なものとなる。その管相互の圧接状態で、
両テーパチャック8・8の間の管外部に配置されている
溶接トーチ9を管突合せ箇所に近づけ、管1・1を両テ
ーパチャック8・8と共に回転させながら溶接する。溶
接手段としてはMIG溶接、TIG溶接等がある。その
場合、テーパチャック8を一方の電極として兼ねること
もできる。テーパチャック8は、冷却水を流して溶接部
分を冷却すると同時に、溶接の熱による管1の特にフレ
アリング部分1Aの膨張を押さえる働きも持っている。
(4) Welding process performed while butt-pressing When each taper chuck 8 is further tightened, the two pipes 1.1 are brought into pressure contact with each other by the action of the tapered surface so as to advance toward each other. At the same time as maintaining the degree, close contact between the tubes is ensured. With the pipes pressed against each other,
The welding torch 9 disposed outside the pipe between the tapered chucks 8.8 is brought closer to the pipe butt, and the pipe 1.1 is welded while rotating the pipe 1.1 together with the tapered chucks 8.8. As welding means, there are MIG welding, TIG welding and the like. In that case, the tapered chuck 8 can also serve as one electrode. The tapered chuck 8 has a function of flowing cooling water to cool the welded portion, and at the same time, suppresses expansion of the pipe 1, particularly, the flare portion 1 </ b> A due to welding heat.

【0018】図7は、溶接接合を終わった管の溶接箇所
Wをその前後の部分(フレアリング部分1A)と共に切
欠いたところを示したもので、その溶接箇所Wにおける
管径は他の部分より大きく、溶接箇所Wの前後の部分
(フレアリング部分1A)は緩やかに傾斜していて管内
面に段差がない。
FIG. 7 shows a portion where the welded portion W of the pipe having been welded and joined is cut away together with its front and rear portions (flaring portion 1A). The pipe diameter at the welded portion W is larger than that of the other portions. The portion before and after the welding portion W (flaring portion 1A) is gently inclined, and there is no step on the inner surface of the pipe.

【0019】図7の鎖線示Cはキャップないしカップ形
部材である。このキャップないしカップ形部材Cと管1
とを突合せ溶接して管1の開口端を閉塞する際にも上記
の工程を実施できるのは勿論である。
A chain line C in FIG. 7 is a cap or cup-shaped member. The cap or cup-shaped member C and the pipe 1
It goes without saying that the above steps can also be performed when the open end of the pipe 1 is closed by butt welding.

【0020】[0020]

【発明の効果】上述のように本発明は薄肉管等を突合せ
溶接するに当たり、突合せ溶接する側の開口端にフレア
リング加工を施し、次いでそのフレアリング部分の端面
を真円度を保持した状態で管中心線と垂直に切りそろえ
てフレアリング部分の端面どうしを向かい合わせ、フレ
アリング部分を各々テーパチャックでつかんで突き合わ
せ、その端面相互の接触を保持した状態で突合せ部を外
部から溶接するものであるから、薄肉の管等であるにも
かかわらず高精度な突合せ溶接ができ、自動化も可能で
あり、特に流体輸送管、および保温瓶の内筒等真空状態
に供する筒あるいは管の溶接の場合の致命的欠陥である
穴明きを生じることがない。溶接部の内面はごく滑らか
に仕上がると共に、内径が若干大きくなっているため、
不純物の沈着、および隙間腐食を起こすことがなく、流
量を低下させることがなくて、流体輸送用等に用いる薄
肉管等の突合せ溶接方法として効果がある。
As described above, according to the present invention, when butt-welding a thin-walled tube or the like, flaring is applied to the opening end on the side to be butt-welded, and then the end face of the flaring portion is kept roundness. The flared part is cut perpendicular to the pipe center line, and the end faces of the flared part are faced to each other. Therefore, high-precision butt welding can be performed even with a thin-walled tube, etc., and automation is also possible, especially in the case of welding tubes or tubes to be subjected to a vacuum state such as a fluid transport tube and an inner tube of a heat retaining bottle. It does not produce a hole that is a fatal defect. Since the inner surface of the weld is finished very smoothly and the inner diameter is slightly larger,
It is effective as a butt-welding method for thin-walled pipes and the like used for fluid transportation and the like without depositing impurities and crevice corrosion and without reducing the flow rate.

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

【図1】本発明溶接方法のフレアリング加工工程を示す
一部縦断側面図。
FIG. 1 is a partially longitudinal side view showing a flaring process of the welding method of the present invention.

【図2】フレアリング加工された開口端の一部縦断側面
図。
FIG. 2 is a partial longitudinal side view of an open end subjected to flaring processing.

【図3】開口端の端面の切りそろえ加工工程を示す一部
縦断側面図。
FIG. 3 is a partially longitudinal side view showing a cutting process of an end face of an opening end;

【図4】端面を切りそろえた開口端の一部縦断側面図。FIG. 4 is a partially longitudinal side view of an open end whose end faces are trimmed.

【図5】開口端面どうしの突合せ工程を示す一部縦断側
面図。
FIG. 5 is a partially longitudinal side view showing a butting process of opening end faces.

【図6】溶接工程を示す一部縦断側面図。FIG. 6 is a partially longitudinal side view showing a welding process.

【図7】溶接接合を終わった管の一部縦断側面図。FIG. 7 is a partial longitudinal side view of a pipe after welding welding.

【符号の説明】[Explanation of symbols]

1 管 1A フレアリング部分 2 ダイス型 3 テーパ穴 4 エキスパンダ 5 遊転ローラ 6 テーパ心型 6A 円周方向溝 7 回転カッタ 8 テーパチャック 9 溶接トーチ C キャップないしカップ形部材 W 溶接箇所 DESCRIPTION OF SYMBOLS 1 Pipe 1A Flaring part 2 Die type 3 Tapered hole 4 Expander 5 Idle roller 6 Tapered core type 6A Circumferential groove 7 Rotating cutter 8 Taper chuck 9 Welding torch C Cap or cup-shaped member W Welding point

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 突合せ溶接する側の開口端にテーパ状の
フレアリング加工を施す工程、フレアリング加工した開
口端の端面を、テーパ部の所定位置に円周方向溝を有す
るテーパ心型と、その円周方向溝を刃の逃げ溝として作
動するカッタとにより、真円度を保持した状態で管中心
線と垂直に切断する工程、フレアリング加工側の開口端
同士を向かい合わせてフレアリング部分を各々テーパチ
ャックでつかみ、開口端面の真円度を保持した状態で開
口端を突き合わせる工程、開口端相互の接触を保持した
状態で突合せ部を外部から溶接する工程の順に行うこと
を特徴とする薄肉管等の突合せ溶接方法。
1. A step of applying a tapered flaring process to an opening end on a side to be butt-welded, wherein the flared opening end surface has a circumferential groove at a predetermined position of the tapered portion.
Tapered core and its circumferential groove as a relief groove for the blade
Step of cutting perpendicular to the pipe center line while maintaining roundness by moving cutter , open end on flaring side
Facing each other, grasping the flared portion with a taper chuck, and butting the open ends while maintaining the roundness of the open end surface, welding the butted portion from the outside while maintaining the mutual contact of the open ends A butt welding method for a thin-walled tube or the like, which is performed in the order of processes.
【請求項2】 前記テーパチャックは前記フレアリング
部分と同じ斜度のつかみ面を有する割型チャックである
請求項1記載の薄肉管等の突合せ溶接方法。
2. The method according to claim 1, wherein the tapered chuck is flared.
The butt welding method for a thin-walled tube or the like according to claim 1, which is a split-type chuck having a grip surface having the same inclination as that of the portion .
【請求項3】 前記の溶接工程において前記テーパチャ
ックを溶接時の電極に兼用させるようにした請求項1ま
たは2記載の薄肉管等の突合せ溶接方法。
3. The method according to claim 2 , wherein the taper cha in the welding step is
Claim 1 wherein the hook is also used as an electrode during welding.
Or a butt welding method for a thin-walled tube or the like according to 2 .
JP33447694A 1994-12-19 1994-12-19 Butt welding method for thin-walled pipes Expired - Lifetime JP2928737B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33447694A JP2928737B2 (en) 1994-12-19 1994-12-19 Butt welding method for thin-walled pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33447694A JP2928737B2 (en) 1994-12-19 1994-12-19 Butt welding method for thin-walled pipes

Publications (2)

Publication Number Publication Date
JPH08168881A JPH08168881A (en) 1996-07-02
JP2928737B2 true JP2928737B2 (en) 1999-08-03

Family

ID=18277825

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33447694A Expired - Lifetime JP2928737B2 (en) 1994-12-19 1994-12-19 Butt welding method for thin-walled pipes

Country Status (1)

Country Link
JP (1) JP2928737B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4535682B2 (en) * 2003-01-30 2010-09-01 株式会社ベステックスキョーエイ Manufacturing method of fuel inlet
JP4735184B2 (en) * 2005-10-20 2011-07-27 株式会社デンソー Abnormality discrimination evaluation method for welded workpiece and abnormality discrimination evaluation device
ES2312242B1 (en) * 2006-01-23 2009-10-08 Portinox, S.A. PERFECTED MANUFACTURING PROCESS OF FINE WALL METAL CONTAINERS.
JP2010027582A (en) * 2008-07-24 2010-02-04 Chofu Seisakusho Co Ltd Manufacturing method of reformer for fuel cell
CN111198547B (en) * 2020-01-15 2020-12-29 重庆大学 Self-feedback control method and system for coordinated optimization of flatness and residual stress of accumulated material
CN114101954A (en) * 2021-11-24 2022-03-01 上海航天设备制造总厂有限公司 Small-deformation welding method for thin conduit butt joint structure

Also Published As

Publication number Publication date
JPH08168881A (en) 1996-07-02

Similar Documents

Publication Publication Date Title
US9067279B1 (en) Apparatus for joint sealing using tube expansion and friction welding
US6142360A (en) Method of friction welding tubular members
US6892928B2 (en) Method of manufacturing tubular body, by friction stir welding
JP2928737B2 (en) Butt welding method for thin-walled pipes
JPH08226584A (en) Flexible metallic hose connector and its formation
JPH04166660A (en) Manufacture of fuel delivery pipe
US2998646A (en) Method of joining metal by high pressure controlled temperature diffusion welding
CN106514029B (en) The method of long tube end built-up welding
JPH04266684A (en) Jig and method for connecting metal tube
KR101499631B1 (en) Method for the production of hot-finished seamless pipes having optimized fatigue properties in the welded state
JPH07284925A (en) Method for butt-welding tube materials
KR20100130435A (en) Tab piece, method of fabaricating tab piece, method of thick pipe
JPH0244627B2 (en) DENKIONSUIKITONOKANTAINOSEIZOHOHO
JPH08243851A (en) Manufacture of double layer steel pipe excellent in work site welding executability
JPS60111728A (en) Expanding method of electric welded pipe
JPS59232698A (en) Jig for butt-welding of pipes
JP2001246421A (en) Metal tube manufacturing method
JPS6358679B2 (en)
JPS6065990A (en) Manufacture of t pipe joint or rotary pipe joint
JP2002263835A (en) Method for manufacturing can body
JPS6336973A (en) Welding method for thick bending steel pipe
JPH0323066A (en) Peripheral joint welding method for duplex tube
JPH054198B2 (en)
JP4257622B2 (en) Reducer production method
CN117758258A (en) Manufacturing method for high-speed laser cladding of inner hole of oil cylinder

Legal Events

Date Code Title Description
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 19990413

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20080514

Year of fee payment: 9

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090514

Year of fee payment: 10

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100514

Year of fee payment: 11

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110514

Year of fee payment: 12

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110514

Year of fee payment: 12

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120514

Year of fee payment: 13

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130514

Year of fee payment: 14

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140514

Year of fee payment: 15

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term