JP3254654B2 - 3-point stop swing welding method - Google Patents
3-point stop swing welding methodInfo
- Publication number
- JP3254654B2 JP3254654B2 JP6358094A JP6358094A JP3254654B2 JP 3254654 B2 JP3254654 B2 JP 3254654B2 JP 6358094 A JP6358094 A JP 6358094A JP 6358094 A JP6358094 A JP 6358094A JP 3254654 B2 JP3254654 B2 JP 3254654B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- swing
- torch
- speed
- voltage
- 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 - Fee Related
Links
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、管端間を溶接して連続
管とする２つの管を固定して、管端間のリング状開先に
倣わせるように、溶接ヘッドを管外周面に沿って周回走
行させて溶接する全姿勢溶接方法において、比較的厚肉
管に適用して高品質のビードを得ることが可能な溶接方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of fixing two pipes which are welded between pipe ends to form a continuous pipe, and having a welding head on the outer periphery of the pipe so as to follow a ring-shaped groove between the pipe ends. The present invention relates to a welding method which can be applied to a relatively thick pipe to obtain a high-quality bead in an all-position welding method in which welding is performed by orbiting along a surface.
【０００２】[0002]
【従来の技術】従来、この種の溶接では、一定の溶接電
流，電圧条件で溶接トーチを開先幅方向（管軸と平行な
方向）に揺動しながら管の上下左右の溶接姿勢に応じて
溶接するか、又は溶接電流を揺動時に低電流，揺動両端
の停止時に高電流と変化させて両端の溶込みを改善しな
がら行っていた。2. Description of the Related Art Conventionally, in this type of welding, a welding torch is swung in a groove width direction (a direction parallel to a pipe axis) under a constant welding current and voltage condition, and the welding torch is adjusted in accordance with the welding posture in the vertical and horizontal directions of the pipe. The welding current has been improved by changing the welding current to a low current when swinging and a high current when both ends of the swing are stopped to improve the penetration at both ends.
【０００３】[0003]
【発明が解決しようとする課題】しかるに、管厚が増大
するに従い、多層盛溶接における上層部の溶接になる
と、開先幅が広くなって、従来法の溶接では特に上向姿
勢位置のビード中央部が図５に示すように凹形状となる
欠点があった。これを改善するため溶接電流を上昇する
と図６に示すように中央部が凸形状になりやすく、また
内部欠陥１９の発生要因にもなっている。However, as the thickness of the pipe increases, the width of the groove becomes wider when the upper layer is welded in multi-pass welding, and in the conventional welding, the center of the bead is particularly in the upward position. There was a drawback that the portion became concave as shown in FIG. If the welding current is increased to improve this, the central portion is likely to have a convex shape as shown in FIG.
【０００４】これらの課題を解消して内部欠陥がなく、
しかも平滑なビード形状を得るためには、溶接電流，電
圧に加えてトーチの揺動速度，両端の停止時間等の条件
を適正値として組合せる必要があった。[0004] By solving these problems, there is no internal defect,
In addition, in order to obtain a smooth bead shape, it is necessary to combine conditions such as the torch swing speed and the stop time at both ends as appropriate values in addition to the welding current and voltage.
【０００５】本発明は、前述の従来溶接方法の中で、特
に上向姿勢溶接において簡易な手段で内部欠陥がなく、
しかも平滑なビード形状を得ることを目的とする。According to the present invention, in the conventional welding method described above, especially in the upward position welding, there is no internal defect by simple means,
Moreover, it is intended to obtain a smooth bead shape.
【０００６】[0006]
【課題を解決するための手段】本発明では前述の従来溶
接方法の課題を解消する手段として以下の通りとする。
即ち、厚肉管の多層盛溶接における上層部における開先
幅の広い上向姿勢位置でトーチを揺動するとき、溶接電
流，電圧を揺動時に低電流，低電圧とし、揺動幅の両端
および中央の３点で揺動を一時的に停止して、溶込みを
改善するため高電流，高電圧とし 、 かつ中央の停止時間
を両端のそれそれの停止時間に対して1／３〜1／4の範
囲にする。According to the present invention, means for solving the above-mentioned problems of the conventional welding method are as follows.
That is, when the torch is oscillated in the upward position where the groove width is large in the upper layer portion in the multi-layer welding of a thick-walled pipe, the welding current and voltage are set to low current and low voltage when oscillating. and central to temporarily stop the swing at three points, a high current in order to improve penetration, and high voltage and middle downtime
In the range of 1/3 to 1/4 with respect to the stopping time at each end.
To surround .
【０００７】[0007]
【作用】図１はこの関係を時間軸（横軸）に沿って示し
たものである。図１の（ａ）はトーチの揺動軌跡を示す
もので、トーチを開先幅（Ｂ）の左端（Ｂ1）から右端
（Ｂ2）の間で揺動させる際、揺動幅の左右両端（Ｂ1，
Ｂ2）および中央部（Ｂ0）でトーチの揺動を一時的に停
止させる。図１の（ｂ），（ｃ）は溶接電流，電圧の波
形を示すもので、揺動時（Ｌ）は低電流（ＬI），低電
圧（Ｌv）をべースとして、揺動幅両端及び中央の停止
時間帯（Ｈｌ，Ｈｒ，Ｈｃ）では高電流（ＨI）、高電
圧（Ｈｖ）を与え、溶込みを改善する。FIG. 1 shows this relationship along the time axis (horizontal axis). FIG. 1A shows the trajectory of the swing of the torch. When the torch is swung from the left end (B 1 ) to the right end (B 2 ) of the groove width (B), the swing width of the torch is changed. Both ends (B 1 ,
The swing of the torch is temporarily stopped at B 2 ) and at the center (B 0 ). 1 (b) and 1 (c) show the waveforms of the welding current and voltage, and the swing width (L) is based on the low current (L I ) and low voltage (Lv). ends and middle of the stop time period (Hl, Hr, Hc) in the high current (H I), a high voltage is applied (Hv), to improve the penetration.
【０００８】なお、揺動幅両端及び中央の一時的な停止
時間の長さを変えることにより、積層厚をコントロール
することができる。It is to be noted that the lamination thickness can be controlled by changing the length of the temporary stop time at both ends and the center of the swing width.
【０００９】[0009]
【実施例】以下、本発明の実施例を示す。図２は本発明
の溶接方法を適用するシステム構成の一例であって、そ
れぞれの機能は下記の通りである：１は、溶接条件作成
器で、図１に示す溶接電流，電圧（ＨI，ＬI，Ｈｖ，Ｌ
ｖ）および揺動停止時間（Ｈｌ，Ｈｃ，Ｈｒ），揺動速
度（Ｌ），揺動幅（Ｂ）の各条件を作成する。２は１で
作成した溶接条件に基づき溶接機器を制御するプログラ
ムロジックコントローラ（以下ＰＬＣ）である。トーチ
の揺動および溶接条件は、ＰＬＣ２からデジタル信号で
出力され、ディジタル／アナログ変換器（以下Ｄ／Ａ）
４ａでアナログ信号に変換し、揺動用アンプ５ａを介し
て揺動用駆動モータ６を駆動する。Embodiments of the present invention will be described below. FIG. 2 shows an example of a system configuration to which the welding method according to the present invention is applied. The respective functions are as follows: 1 is a welding condition creator, which is a welding current and voltage (H I , L I , Hv, L
v), the swing stop time (Hl, Hc, Hr), the swing speed (L), and the swing width (B) are created. Reference numeral 2 denotes a program logic controller (hereinafter, PLC) that controls welding equipment based on the welding conditions created in 1. The torch swing and welding conditions are output as digital signals from the PLC 2 and are converted to digital / analog converters (hereinafter D / A).
At 4a, the signal is converted into an analog signal, and the swing drive motor 6 is driven via the swing amplifier 5a.
【００１０】７はタコジェネレータでモータ６の回転速
度に比例する周波数の電気パルス（速度同期パルス）を
発生し、これを周波数／電圧（Ｆ／Ｖ）変換して、揺動
速度を表わすアナログ信号（速度フィ−ドバック信号）
を出力する。Ｄ／Ａ ４ａの出力アナログ信号が速度目
標信号であり、目標速度に対する検出速度（フィ−ドバ
ック信号）の偏差を表わすエラ−信号が揺動用アンプ５
ａに与えられ、揺動用駆動モ−タ６の通電電流値が、検
出速度が目標速度になるように制御され、これにより揺
動速度がＰＬＣ２から与えられた揺動速度（指令値）と
なる。Reference numeral 7 denotes a tachogenerator which generates an electric pulse (speed synchronization pulse) having a frequency proportional to the rotation speed of the motor 6, converts this into a frequency / voltage (F / V) signal, and converts it into an analog signal representing the swing speed. (Speed feedback signal)
Is output. The output analog signal of the D / A 4a is a speed target signal, and an error signal indicating a deviation of a detected speed (feedback signal) from the target speed is a swing amplifier 5.
a, the current supplied to the swing drive motor 6 is controlled so that the detected speed becomes the target speed, whereby the swing speed becomes the swing speed (command value) given from the PLC 2. .
【００１１】３は揺動検出器であって、トーチの揺動位
置を検出し、ＰＬＣ２で位置を読み取り、揺動の左端，
中央及び右端を正確に割り出す。４ｂはＰＬＣ２より出
力されるワイヤー送給速度（溶接電流を制御）のＤ／Ａ
変換器であり、送られた信号はワイヤー送給アンプ５ｂ
を介してワイヤー送給用駆動モータ８を制御する。９は
タコジェネレータでモータ８の回転速度に比例する周波
数の電気パルス（速度同期パルス）を発生し、これを周
波数／電圧（Ｆ／Ｖ）変換して、ワイヤ−送給速度を表
わすアナログ信号（速度フィ−ドバック信号）を出力す
る。Ｄ／Ａ ４ｂの出力アナログ信号が速度目標信号で
あり、目標速度に対する検出速度（フィ−ドバック信
号）の偏差を表わすエラ−信号がワイヤ−送給用アンプ
５ｂに与えられ、ワイヤ−送給用駆動モ−タ８の通電電
流値が、検出速度が目標速度になるように制御され、こ
れによりワイヤ−送給速度がＰＬＣ２から与えられたワ
イヤ−速度（指令値）となる。Reference numeral 3 denotes a swing detector which detects the swing position of the torch, reads the position with the PLC 2, and detects the left end of the swing,
Determine the center and right edges accurately. 4b is the D / A of the wire feed speed (controlling the welding current) output from the PLC 2.
Is a converter, and the transmitted signal is a wire feed amplifier 5b.
The wire feed drive motor 8 is controlled via the. Reference numeral 9 denotes a tachogenerator which generates an electric pulse (speed synchronizing pulse) having a frequency proportional to the rotation speed of the motor 8, converts the frequency into a voltage / voltage (F / V) signal, and converts the analog signal into an analog signal (wire / feed speed). (Speed feedback signal). The output analog signal of the D / A 4b is a speed target signal, and an error signal indicating the deviation of the detected speed (feedback signal) from the target speed is given to the wire-feeding amplifier 5b, and the wire-feeding amplifier is used. The current supplied to the drive motor 8 is controlled so that the detected speed becomes the target speed, whereby the wire feed speed becomes the wire speed (command value) given from the PLC 2.
【００１２】４ｃはＰＬＣ２より出力される溶接電圧の
Ｄ／Ａ変換器で、その出力アナログ信号は溶接電圧（目
標値）を指示する。この目標値に対するト−チ１１の溶
接電圧の偏差が溶接電源１０に与えられ、溶接電源１０
の出力電圧が、ト−チ１１の溶接電圧が目標値（Ｄ／Ａ
４ｃの出力）になるように自動調整される。Reference numeral 4c denotes a D / A converter for the welding voltage output from the PLC 2, and its output analog signal indicates the welding voltage (target value). The deviation of the welding voltage of the torch 11 from the target value is given to the welding power source 10 and the welding power source 10
Is the output voltage of the torch 11, and the welding voltage of the torch 11 is the target value (D / A).
4c).
【００１３】図３および図４は、管厚ｔ＝19mm、開先幅
Ｂ＝24mmの管突合わせ溶接に本発明を実施して得られた
溶接ビード形状を示す、管軸方向に沿って切断した縦断
面であり、細部は誇張して示す。図３は目違いＦ＝0.5m
m、図４は目違いＦ＝1.5mmとしたものである。使用した
ワイヤーはφ0.9を用い、その他の溶接条件は次の表１
に示す通りである。FIGS. 3 and 4 show a weld bead shape obtained by applying the present invention to a pipe butt weld having a pipe thickness t = 19 mm and a groove width B = 24 mm, which is cut along the pipe axis direction. Vertical section, with details exaggerated. Fig. 3 shows misalignment F = 0.5m
m, and FIG. 4 shows the misalignment F = 1.5 mm. The wire used was φ0.9, and the other welding conditions are shown in Table 1 below.
As shown in FIG.
【００１４】[0014]
【表１】 [Table 1]
【００１５】いずれも最終層のビード１５（図３），１
６（図４）の余盛高さＨは、1.5〜2.5mm以内の適正範囲
が得られ、内部欠陥もなく、しかも平滑な形状が得られ
た。Each of the beads 15 (FIG. 3), 1
6 (FIG. 4) had an appropriate height within the range of 1.5 to 2.5 mm, and had a smooth shape with no internal defects.
【００１６】[0016]
【発明の効果】本発明によれば、溶接電流，電圧，揺動
速度及び両端停止時間等の多様な条件を特性値として厳
密に管理する必要なく、トーチ揺動幅の両端及び中央に
おける停止時間を設定するのみの容易な操作で、平滑で
内部欠陥のない高品質で、しかも美れいな溶接ビード形
状が得られる。さらに、目違いＦがあっても実質上影響
がない。According to the present invention, it is not necessary to strictly manage various conditions such as welding current, voltage, rocking speed, and both ends stop time as characteristic values, and the stop times at both ends and the center of the torch swing width are not required. With a simple operation of setting only a high quality, it is possible to obtain a high quality and beautiful weld bead shape which is smooth and free from internal defects. Further, even if there is a misalignment F, there is substantially no effect.
【図１】 本発明の３点揺動溶接方法における揺動軌
跡，溶接電流および電圧波形を示すタイムチャ−トであ
る。FIG. 1 is a time chart showing a swing locus, a welding current and a voltage waveform in a three-point swing welding method of the present invention.
【図２】 本発明の溶接方法を実施するシステム構成図
の一例を示すブロック図である。。FIG. 2 is a block diagram showing an example of a system configuration diagram for implementing the welding method of the present invention. .
【図３】 本発明の一実施例による溶接結果を示す図面
であり、管軸に平行に溶接管を切断した縦断面図であ
る。FIG. 3 is a view showing a welding result according to one embodiment of the present invention, and is a longitudinal sectional view of a welded pipe cut in parallel to a pipe axis.
【図４】 本発明の一実施例によるもう１つの溶接結果
を示す図面であり、管軸に平行に溶接管を切断した縦断
面図である。FIG. 4 is a view showing another welding result according to one embodiment of the present invention, and is a longitudinal sectional view in which a welded pipe is cut in parallel to a pipe axis.
【図５】 従来の溶接方法による溶接結果を示す図面で
あり、管軸に平行に溶接管を切断した縦断面図である。FIG. 5 is a drawing showing a welding result by a conventional welding method, and is a longitudinal sectional view in which a welded pipe is cut in parallel to a pipe axis.
【図６】 従来の溶接方法によるもう１つの溶接結果を
示す図面であり、管軸に平行に溶接管を切断した縦断面
図である。FIG. 6 is a view showing another welding result by a conventional welding method, and is a longitudinal sectional view in which a welded pipe is cut in parallel to a pipe axis.
１：溶接条件作成器 ２：プログラムロジックコントローラ（ＰＬＣ） ３：揺動検出器 ４ａ〜４ｃ：ディジタル／アナログ変換器（Ｄ／Ａ） ５ａ：揺動用アンプ ５ｂ：ワイヤー送
給用アンプ ６：揺動用駆動モータ ７：揺動用タコジ
ェネレータ ８：ワイヤー送給用駆動モータ ９：ワイヤー送給
用タコジェネレータ １０：溶接電源 １１：溶接トーチ １２：溶接ワイヤー １３：溶接母材 １４：管 １５，１６：本発
明による溶接部 Ｆ：目違い Ｂ：ビード幅 Ｈ：余盛り高さ1: welding condition creator 2: program logic controller (PLC) 3: swing detector 4a to 4c: digital / analog converter (D / A) 5a: swing amplifier 5b: wire feed amplifier 6: swing Drive motor 7: Tach generator for swinging 8: Drive motor for wire feed 9: Tacho generator for wire feed 10: Welding power supply 11: Welding torch 12: Welding wire 13: Welding base material 14: Pipe 15, 16: The present invention F: misalignment B: bead width H: extra height
───────────────────────────────────────────────────── フロントページの続き (72)発明者 副 島 幸 二 東京都千代田区大手町２−６−３ 新日 本製鐵株式会社内 (72)発明者 帆 足 薫 千葉県習志野市東習志野７丁目６番１号 日鐵溶接工業株式会社 機器事業部内 (72)発明者 杉 田 良 介 千葉県習志野市東習志野７丁目６番１号 日鐵溶接工業株式会社 機器事業部内 (56)参考文献 特開 昭51−37849（ＪＰ，Ａ) 特開 昭55−153681（ＪＰ，Ａ) 特開 昭56−158278（ＪＰ，Ａ) 特開 昭58−188564（ＪＰ，Ａ) 特開 昭57−118868（ＪＰ，Ａ) 特公 昭51−20461（ＪＰ，Ｂ１) 特公 昭54−39186（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) B23K 9/028 B23K 9/095 B23K 9/12 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Koji Soejima, Inventor 2-6-3 Otemachi, Chiyoda-ku, Tokyo Nippon Steel Corporation (72) Inventor Kaoru Saashi 7-chome, Higashi-Narashino, Narashino-shi, Chiba No. 6-1 Nippon Steel Welding Industry Co., Ltd. Equipment Division (72) Inventor Ryosuke Sugita 7-6-1, Higashi Narashino, Narashino City, Chiba Prefecture Nippon Steel Welding Industry Co., Ltd. Equipment Division (56) References JP JP-A-55-153681 (JP, A) JP-A-56-158278 (JP, A) JP-A-58-188564 (JP, A) JP-A-57-118868 (JP, A) A) Japanese Patent Publication No. 51-20461 (JP, B1) Japanese Patent Publication No. 54-39186 (JP, B2) (58) Fields investigated (Int. Cl. 7 , DB name) B23K 9/028 B23K 9/095 B23K 9 / 12
Claims (1)
き溶接において、トーチを溶接線に沿って進行させると
共に、開先幅方向に揺動させ、揺動幅の両端及び中央の
３点でトーチの揺動を一時的に停止させ、停止中の溶接
電流を増加し、かつ中央の停止時間を両端のそれそれの
停止時間に対して1／３〜1／4の範囲にすることを特徴
とする３点停止揺動溶接方法。1. Upward in butt circumferential welding of fixed pipes
In came welding, with advancing along the torch weld line, is swung in the groove width direction, temporarily stops the oscillation of the torch at three points at both ends and the center of the swing width, welding stopped
Increase the current and increase the central downtime
A three-point stop rocking welding method characterized in that the stop time is in the range of 1/3 to 1/4 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6358094A JP3254654B2 (en) | 1994-03-31 | 1994-03-31 | 3-point stop swing welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6358094A JP3254654B2 (en) | 1994-03-31 | 1994-03-31 | 3-point stop swing welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07266038A JPH07266038A (en) | 1995-10-17 |
| JP3254654B2 true JP3254654B2 (en) | 2002-02-12 |
Family
ID=13233350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6358094A Expired - Fee Related JP3254654B2 (en) | 1994-03-31 | 1994-03-31 | 3-point stop swing welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3254654B2 (en) |
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| KR101622676B1 (en) * | 2014-04-17 | 2016-05-20 | 대우조선해양 주식회사 | Apparatus and method for large volume butt joint welding |
| CN112276390B (en) * | 2020-10-13 | 2022-03-29 | 太原科技大学 | Multilayer multi-welding track planning method for thick plate large slope |
-
1994
- 1994-03-31 JP JP6358094A patent/JP3254654B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102783600B (en) * | 2012-09-05 | 2013-05-15 | 福建省龙海市安利达工贸有限公司 | Processing method of sea tangle steamed bread |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07266038A (en) | 1995-10-17 |
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