JPH06210486A - Welding method for inclined joints - Google Patents
Welding method for inclined jointsInfo
- Publication number
- JPH06210486A JPH06210486A JP1677393A JP1677393A JPH06210486A JP H06210486 A JPH06210486 A JP H06210486A JP 1677393 A JP1677393 A JP 1677393A JP 1677393 A JP1677393 A JP 1677393A JP H06210486 A JPH06210486 A JP H06210486A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- welded
- groove
- connecting pipe
- tongue
- 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.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
(57)【要約】
【目的】 傾斜継手の溶接時に発生する変形及び被溶接
管と接続管との心ずれを減少させる。
【構成】 円管を軸心線に対して９０゜以外の角度で切
断した傾斜面３で被溶接管２に接続管４を突き合わせ溶
接する傾斜継手５の溶接方法において、前記被溶接管２
と接続管４の傾斜継手５部に、舌片状先端部６の開先切
込み角度α1が小さく、前記舌片状先端部６に対向する
Ｕ字状底部７の開先切込み角度α2が大きく、他の部分
の開先切込み角度が被溶接管２と接続管４とで等しくな
るように連続した開先１０を形成した後、該開先１０の
肉盛溶接を行って被溶接管２に接続管４を取付ける。
(57) [Abstract] [Purpose] To reduce the deformation that occurs during welding of tilted joints and the misalignment between the pipe to be welded and the connecting pipe. A welding method for a tilted joint 5 in which a connecting pipe 4 is butt-welded to a pipe 2 to be welded by an inclined surface 3 obtained by cutting a circular pipe at an angle other than 90 ° with respect to an axis of the welded pipe 2.
In the inclined joint 5 part of the connecting pipe 4, the groove cutting angle α 1 of the tongue-shaped tip 6 is small, and the groove cutting angle α 2 of the U-shaped bottom 7 facing the tongue-shaped tip 6 is small. After forming a continuous groove 10 so that the groove cut angle of the other portion is large in the welded pipe 2 and the connection pipe 4, the weld welded pipe 2 is formed by overlay welding of the groove 10. Attach the connecting pipe 4 to.
Description
【０００１】[0001]
【産業上の利用分野】本発明は傾斜継手の溶接方法に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for welding a tilt joint.
【０００２】[0002]
【従来の技術】従来より、図３に示すように容器等の曲
面板１に短管状のノズル等が備えられ、このノズルを被
溶接管２としてこの被溶接管２に、前記曲面板１の傾斜
に略沿った傾斜面３で接続管４を外周側或いは内周側か
ら突合せ溶接する、所謂傾斜継手５と呼ばれる溶接方法
を用いる場合がある。2. Description of the Related Art Conventionally, as shown in FIG. 3, a curved plate 1 such as a container is provided with a short tubular nozzle or the like, and this nozzle is used as a pipe 2 to be welded, and the pipe 2 to be welded is connected to the curved plate 1. In some cases, a welding method called a so-called inclined joint 5 in which the connecting pipe 4 is butt-welded from the outer peripheral side or the inner peripheral side with the inclined surface 3 substantially along the inclination is used.
【０００３】傾斜継手５は、被溶接管２と接続管４が軸
心線に対して９０゜以外の角度で切断された傾斜面３で
突き合わせ溶接されるもので、従って前記傾斜面３の傾
斜方向の０゜の位置には図４（Ａ）に示すように接続管
４に舌片状先端部６が形成されると共に被溶接管２には
前記舌片状先端部６に対向するＵ字状底部７が形成さ
れ、また１８０゜の位置には図４（Ｃ）に示すように被
溶接管２に舌片状先端部６が形成されると共に接続管４
には前記舌片状先端部６に対向するＵ字状底部７が形成
されるようになる。９０゜及び２７０゜の位置は図４
（Ｂ）に示すように傾斜面３となっている。The inclined joint 5 is formed by butt welding the welded pipe 2 and the connecting pipe 4 at an inclined surface 3 cut at an angle other than 90 ° with respect to the axis, and therefore the inclination of the inclined surface 3 is increased. As shown in FIG. 4 (A), a tongue-shaped tip 6 is formed on the connecting pipe 4 at a position of 0 ° in the direction, and a U-shaped portion of the pipe 2 to be welded faces the tongue-shaped tip 6. 4 is formed, and at a position of 180 °, a tongue-shaped tip 6 is formed on the pipe 2 to be welded as shown in FIG.
A U-shaped bottom portion 7 facing the tongue-shaped tip portion 6 is formed at the bottom. The 90 ° and 270 ° positions are shown in FIG.
As shown in (B), it has an inclined surface 3.
【０００４】上記した形状を有する例えば内周側から溶
接する場合、従来は図５に示すように傾斜継手５部の内
周に沿って、被溶接管２及び接続管４の軸心線と直角な
面に対して総ての位置で被溶接管２と接続管４の開先切
込み角度αが等しい開先８を形成して、該開先８を図６
に示すように肉盛溶接９することにより被溶接管２に接
続管４を取付けるようにしている。In the case of welding, for example, from the inner peripheral side having the above-mentioned shape, conventionally, as shown in FIG. 5, along the inner periphery of the inclined joint 5 portion, the pipe 2 to be welded and the connecting pipe 4 are perpendicular to the axis. 6 is formed at all positions with respect to the plane, the groove 8 having the same groove cutting angle α between the pipe 2 to be welded and the connecting pipe 4 is formed.
The connection pipe 4 is attached to the welded pipe 2 by overlay welding 9 as shown in FIG.
【０００５】[0005]
【発明が解決しようとする課題】しかし、前記従来の総
ての位置で開先切込み角度αが等しい開先８を形成して
傾斜継手５を肉盛溶接９する方法では、前記舌片状先端
部６の強度がＵ字状底部７に比較して大幅に小さいため
に、図６に示すように舌片状先端部６が肉盛溶接９部の
固化時の収縮によって矢印で示すように中側に入り込む
変形Ｓが発生し、この変形Ｓによって被溶接管２と接続
管４が心ずれＬを生じ、そのために被溶接管２及び接続
管４内に機材を通す場合には機材が通過できなくなるこ
とがあり、また前記変形によって被溶接管２と接続管４
の内部流路断面が絞られてしまう問題があり、従ってこ
の様な場合には前記被溶接管２及び接続管４内を切削加
工する必要が生じる等の問題を有していた。However, in the conventional method of forming the groove 8 having the same groove cutting angle α at all positions and performing the overlay welding 9 of the tilted joint 5, the tongue-shaped tip is formed. Since the strength of the portion 6 is significantly smaller than that of the U-shaped bottom portion 7, as shown in FIG. 6, the tongue-shaped tip portion 6 contracts during the solidification of the weld overlay 9 portion as shown by an arrow. A deformation S that enters the side occurs, and this deformation S causes a misalignment L between the welded pipe 2 and the connecting pipe 4. Therefore, when passing the equipment through the welded pipe 2 and the connecting pipe 4, the equipment cannot pass through. The welded pipe 2 and the connecting pipe 4 may be lost.
There is a problem that the cross section of the internal flow path is narrowed. Therefore, in such a case, there is a problem that it is necessary to cut the inside of the welded pipe 2 and the connecting pipe 4.
【０００６】本発明は、上記従来の問題点に鑑みてなし
たもので、傾斜継手の溶接時に発生する変形及び被溶接
管と接続管との心ずれを極力減少させるようにした傾斜
継手の溶接方法を提供することを目的とする。The present invention has been made in view of the above-mentioned problems of the prior art, and welding of a tilted joint in which the deformation and the misalignment between the pipe to be welded and the connecting pipe that occur during welding of the tilted joint are reduced as much as possible. The purpose is to provide a method.
【０００７】[0007]
【課題を解決するための手段】本発明は、円管を軸心線
に対して９０°以外の角度で切断した傾斜面で被溶接管
に接続管を突き合わせ溶接する傾斜継手の溶接方法にお
いて、前記被溶接管と接続管の傾斜継手部に、舌片状先
端部の開先切込み角度が小さく、前記舌片状先端部に対
向するＵ字状底部の開先切込み角度が大きく、他の部分
の開先切込み角度が被溶接管と接続管とで同一となるよ
うに連続した開先を形成した後、前記開先の肉盛溶接を
行って被溶接管に接続管を取付けることを特徴とする傾
斜継手の溶接方法、に係るものである。DISCLOSURE OF THE INVENTION The present invention provides a welding method for a gradient joint in which a connecting pipe is butt-welded to a pipe to be welded at an inclined surface obtained by cutting a circular pipe at an angle other than 90 ° with respect to an axis. In the inclined joint portion of the pipe to be welded and the connecting pipe, the groove cutting angle of the tongue-shaped tip portion is small, and the groove cutting angle of the U-shaped bottom portion facing the tongue-shaped tip portion is large, and the other portion. After forming a continuous groove so that the groove cut-in angle of the welded pipe and the connecting pipe are the same, buildup welding of the groove is performed to attach the connecting pipe to the welded pipe. The present invention relates to a method for welding a tilted joint.
【０００８】[0008]
【作用】本発明では、被溶接管と接続管の舌片状先端部
に形成する開先切込み角度を小さく、前記舌片状先端部
が対向するＵ字状底部に形成する開先切込み角度を大き
く且つ他の部分の開先切込み角度を被溶接管と接続管で
同一となるように連続させた開先を形成し、該開先に肉
盛溶接するようにしているので、前記舌片状先端部の強
度が増大され、Ｕ字状底部の強度が減少されることによ
って舌片状先端部とＵ字状底部の強度の差が小さくなる
ことにより変形の発生が押えられる。According to the present invention, the groove cut angle formed at the tongue-shaped tip portions of the pipe to be welded and the connecting pipe is small, and the groove cut angle formed at the U-shaped bottom portion where the tongue-shaped tip portions face each other. The tongue-like shape is formed by forming a continuous groove so that the groove cutting angle of the large portion and the other portion are the same in the pipe to be welded and the connecting pipe, and the overlay welding is performed on the groove. Since the strength of the tip portion is increased and the strength of the U-shaped bottom portion is reduced, the difference in strength between the tongue-shaped tip portion and the U-shaped bottom portion is reduced, so that the occurrence of deformation is suppressed.
【０００９】[0009]
【実施例】以下本発明の実施例を図面を参照しつつ説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１０】図１及び図２は本発明の一実施例を示すも
ので、前記図３〜図６に示したものと同一物には同一の
符号を付して詳細な説明は省略する。1 and 2 show an embodiment of the present invention. The same parts as those shown in FIGS. 3 to 6 are designated by the same reference numerals and detailed description thereof will be omitted.
【００１１】被溶接管２と接続管４との傾斜継手５に形
成する開先１０を、被溶接管２と接続管４の舌片状先端
部６（図２（Ａ）、（Ｃ）に示す０゜と１８０゜の位
置）に形成する開先切込み角度α1を小さく、前記舌片
状先端部６が対向するＵ字状底部７に形成する開先切込
み角度α2を大きく、他の部分（図２（Ｂ）に示す９０
゜及び２７０゜位置）の開先切込み角度αを被溶接管２
と接続管４で等しくなるように、しかも滑らかに連続す
るように形成する。The groove 10 formed on the inclined joint 5 between the pipe 2 to be welded and the connecting pipe 4 is provided with a tongue-shaped tip 6 of the pipe 2 to be welded and the connecting pipe 4 (see FIGS. 2A and 2C). The groove notch angle α 1 formed at 0 ° and 180 ° shown) is small, and the groove notch angle α 2 formed at the U-shaped bottom 7 facing the tongue-shaped tip 6 is large, and Part (90 shown in FIG. 2B)
° and 270 ° positions) with groove cut-in angle α of welded pipe 2
And the connecting pipe 4 are formed to be equal to each other and smoothly connected.
【００１２】前記したように形成された開先を図６のよ
うに肉盛溶接することにより、被溶接管２に接続管４を
取付ける。The connecting pipe 4 is attached to the welded pipe 2 by overlay welding the groove formed as described above as shown in FIG.
【００１３】上記したように、被溶接管２と接続管４の
舌片状先端部６に形成する開先切込み角度α1を小さ
く、前記舌片状先端部６が対向するＵ字状底部７に形成
する開先切込み角度α2を大きく、他の部分の開先切込
み角度αを被溶接管２と接続管４で等しくなるように連
続させた開先１０を形成すると、前記舌片状先端部６の
強度が増大され、Ｕ字状底部７の強度が減少されること
によって舌片状先端部６とＵ字状底部７の強度の差が小
さくなることにより、肉盛溶接時の変形が押えられるよ
うになる。従って、変形の減少により、被溶接管２と接
続管４との心ずれも減少することになる。As described above, the groove cut angle α 1 formed at the tongue-shaped tip portions 6 of the pipe 2 to be welded and the connection pipe 4 is small, and the U-shaped bottom portion 7 where the tongue-shaped tip portions 6 face each other. When the groove 10 formed by forming the groove 10 with a large groove cutting angle α 2 and the groove cutting angle α of the other portion being equalized in the welded pipe 2 and the connecting pipe 4 is formed, the tongue-shaped tip is formed. Since the strength of the portion 6 is increased and the strength of the U-shaped bottom portion 7 is decreased, the difference in strength between the tongue-shaped tip portion 6 and the U-shaped bottom portion 7 is reduced, so that deformation during overlay welding is prevented. It will be held down. Therefore, by reducing the deformation, the misalignment between the welded pipe 2 and the connecting pipe 4 is also reduced.
【００１４】尚、本発明は前記実施例にのみ限定される
ものではなく、開先を被溶接管と接続管の傾斜継手にお
ける外側に形成して外開先を外側から肉盛溶接する場合
も適用し得ること、その他本発明の要旨を逸脱しない範
囲内に於いて種々変更を加え得ることは勿論である。The present invention is not limited to the above-mentioned embodiment, and a case where the groove is formed on the outer side of the inclined joint between the pipe to be welded and the connecting pipe and the outer groove is welded from the outer side by overlay welding is also applicable. It is needless to say that the present invention can be applied and various changes can be made without departing from the scope of the present invention.
【００１５】[0015]
【発明の効果】本発明の傾斜継手の溶接方法によれば、
被溶接管と接続管の傾斜継手に形成する開先を、舌片状
先端部に形成する開先切込み角度が小さく、前記舌片状
先端部が対向するＵ字状底部に形成する開先切込み角度
が大きく、他の部分の開先切込み角度が被溶接管と接続
管で等しくなるように連続させた形状としているので、
舌片状先端部の強度を増大し、Ｕ字状底部の強度を減少
させて舌片状先端部とＵ字状底部の強度の差を小さくす
ることができ、よって肉盛溶接時の変形の発生が減少
し、同時に被溶接管と接続管との心ずれも減少する優れ
た効果を奏し得る。According to the welding method of the gradient joint of the present invention,
The groove formed in the inclined joint between the pipe to be welded and the connecting pipe has a small groove cut angle formed in the tongue-shaped tip, and the groove cut formed in the U-shaped bottom where the tongue-shaped tip opposes. Since the angle is large and the groove cutting angle of the other part is made continuous so that the welded pipe and the connecting pipe are equal,
The strength of the tongue-shaped tip can be increased and the strength of the U-shaped bottom can be reduced to reduce the difference in strength between the tongue-shaped tip and the U-shaped bottom. It is possible to obtain an excellent effect that the occurrence is reduced and the misalignment between the pipe to be welded and the connecting pipe is also reduced.
【図１】本発明の一実施例を示す切断側面図である。FIG. 1 is a cut side view showing an embodiment of the present invention.
【図２】図１の傾斜継手部に形成した開先の各位置での
開先切込み角度を示す断面図である。FIG. 2 is a cross-sectional view showing a groove cut angle at each position of the groove formed in the tilted joint portion of FIG.
【図３】傾斜継手の一例を示す側面図である。FIG. 3 is a side view showing an example of a tilt joint.
【図４】図３の傾斜継手部の各位置での形状を示す側面
図である。FIG. 4 is a side view showing the shape of the tilted joint portion of FIG. 3 at various positions.
【図５】従来の傾斜継手部に形成した開先の一例を示す
切断側面図である。FIG. 5 is a cut side view showing an example of a groove formed in a conventional inclined joint portion.
【図６】図５の開先を肉盛溶接した際の変形状態を示す
切断側面図である。6 is a cut side view showing a deformed state when overlay welding of the groove of FIG. 5 is performed.
２ 被溶接管 ３ 傾斜面 ４ 接続管 ５ 傾斜継手 ６ 舌片状先端部 ７ Ｕ字状底部 １０ 開先 2 Welded pipe 3 Inclined surface 4 Connection pipe 5 Inclined joint 6 Tongue-like tip 7 U-shaped bottom 10 Groove
Claims (1)
で切断した傾斜面で被溶接管に接続管を突き合わせ溶接
する傾斜継手の溶接方法において、前記被溶接管と接続
管の傾斜継手部に、舌片状先端部の開先切込み角度が小
さく、前記舌片状先端部に対向するＵ字状底部の開先切
込み角度が大きく、他の部分の開先切込み角度が被溶接
管と接続管とで同一となるように連続した開先を形成し
た後、前記開先の肉盛溶接を行って被溶接管に接続管を
取付けることを特徴とする傾斜継手の溶接方法。1. A method for welding a tilted joint in which a connecting pipe is butt-welded to a pipe to be welded with an inclined surface obtained by cutting a circular pipe at an angle other than 90 ° with respect to an axis of the pipe. The tongue-shaped tip has a small groove-cutting angle, the U-shaped bottom facing the tongue-shaped tip has a large groove-cutting angle, and the other portions have a groove-cutting angle to be welded to the inclined joint portion. A method for welding a gradient joint, comprising forming a continuous groove so that the pipe and the connecting pipe are the same, and then overlaying the groove to attach the connecting pipe to the pipe to be welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1677393A JP3264015B2 (en) | 1993-01-06 | 1993-01-06 | Inclined joint welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1677393A JP3264015B2 (en) | 1993-01-06 | 1993-01-06 | Inclined joint welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06210486A true JPH06210486A (en) | 1994-08-02 |
| JP3264015B2 JP3264015B2 (en) | 2002-03-11 |
Family
ID=11925533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1677393A Expired - Lifetime JP3264015B2 (en) | 1993-01-06 | 1993-01-06 | Inclined joint welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3264015B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102350596A (en) * | 2011-08-17 | 2012-02-15 | 湖南中联重科车桥有限公司 | Method for welding bridge shell and axial tube and connection structure of bridge shell and axial tube |
| JP2012206163A (en) * | 2011-03-30 | 2012-10-25 | Toshiba Corp | Groove structure of pipe joint and pipe joint |
-
1993
- 1993-01-06 JP JP1677393A patent/JP3264015B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012206163A (en) * | 2011-03-30 | 2012-10-25 | Toshiba Corp | Groove structure of pipe joint and pipe joint |
| CN102350596A (en) * | 2011-08-17 | 2012-02-15 | 湖南中联重科车桥有限公司 | Method for welding bridge shell and axial tube and connection structure of bridge shell and axial tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3264015B2 (en) | 2002-03-11 |
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| Date | Code | Title | Description |
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