JPH0254187B2 - - Google Patents
Info
- Publication number
- JPH0254187B2 JPH0254187B2 JP59021608A JP2160884A JPH0254187B2 JP H0254187 B2 JPH0254187 B2 JP H0254187B2 JP 59021608 A JP59021608 A JP 59021608A JP 2160884 A JP2160884 A JP 2160884A JP H0254187 B2 JPH0254187 B2 JP H0254187B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- pipe
- pipes
- weld metal
- tube
- 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
Links
- 238000003466 welding Methods 0.000 claims description 71
- 238000000034 method Methods 0.000 claims description 23
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 description 15
- 239000002184 metal Substances 0.000 description 15
- 239000007789 gas Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 239000011148 porous material Substances 0.000 description 7
- 230000005855 radiation Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000000945 filler Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten 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
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
- B23K9/0282—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections
- B23K9/0286—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections with an electrode moving around the fixed tube during the welding operation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、ほぼ水平に固定された状態のアルミ
ニウム管を自動溶接法によつて突合せ周溶接を行
う場合において、所望の品質を満足させるに好適
なアルミニウム管の溶接方法に関するものであ
る。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention is suitable for satisfying desired quality when butt circumferential welding is performed using an automatic welding method on aluminum pipes that are fixed substantially horizontally. The present invention relates to a method for welding aluminum pipes.
従来、炭素鋼やステンレス鋼等の配管の接合の
ための突合せ溶接をテイグ溶接法あるいはミグ溶
接法を用いて自動溶接を行う場合、管をほぼ水平
に固定し溶接装置を管の周囲に回転させて溶接を
行う方法（管固定方式）、または溶接装置を固定
し管を回転させて溶接を完了する方法（管回転方
式）に分けられる。この二つの方法において、管
が長い場合あるいは回転することができない形状
を有する場合、または管がすでに構造物に組み込
まれており回転できない場合には、管固定方式で
溶接がなされる。
Conventionally, when automatically welding butt welding for joining pipes made of carbon steel, stainless steel, etc. using the Teig welding method or MIG welding method, the pipes are fixed almost horizontally and the welding equipment is rotated around the pipes. There are two methods: a method in which the welding is completed by fixing the welding device (pipe fixed method), and a method in which the welding device is fixed and the pipe is rotated to complete the welding (pipe rotating method). In these two methods, if the tube is long or has a shape that cannot be rotated, or if the tube is already installed in a structure and cannot be rotated, welding is performed in a fixed tube manner.
管固定方式において、管をほぼ水平に位置せし
めて溶接装置を移動させる場合、溶接装置は第１
図に示すごとく管材１の頂部からスタートし、す
なわち、溶接を開始して溶接進行軌跡２に示すご
とく時計方向に溶接が進行し、１回転した後、元
の頂部に帰るごとき溶接方法が採用されている。
炭素鋼管あるいはステンレス鋼管の溶接において
は、この方法において適正な電流値、電圧値、溶
接速度および溶加材の供給速度等を採用すれば、
例えばJIS・Z3105で規定される溶接継手につい
ての放射線試験で要求される性能を満足すること
ができる。 In the pipe fixation method, when the welding equipment is moved with the pipe positioned almost horizontally, the welding equipment is
As shown in the figure, a welding method is adopted in which the welding starts from the top of the pipe material 1, and the welding progresses clockwise as shown in the welding progress trajectory 2, and after making one rotation, returns to the original top. ing.
When welding carbon steel pipes or stainless steel pipes, if appropriate current values, voltage values, welding speeds, filler metal supply speeds, etc. are adopted in this method,
For example, it can satisfy the performance required in the radiation test for welded joints stipulated by JIS Z3105.
ところが、アルミニウム管（以下、Al管とい
う）について、上記のような管固定方式で溶接を
頂部から連続して１回転する溶接方法を採用する
と、特に第１図において時計位置で５時ないし７
時の位置すなわち鎖線間の下部の溶接金属内に気
孔が発生し、いろいろに溶接電流、電圧、速度お
よび溶加材の供給速度等の溶接諸元を変化した場
合においても前記の気孔が発生する。 However, for aluminum pipes (hereinafter referred to as Al pipes), if welding is carried out continuously from the top one turn using the pipe fixing method described above, especially when welding is performed from 5 o'clock to 7 o'clock at the clock position as shown in Figure 1.
Pores occur in the weld metal at the lower part between the chain lines, and the above-mentioned pores also occur when welding specifications such as welding current, voltage, speed, and filler metal supply rate are changed in various ways. .
このような気孔が発生する理由を、第２図でも
つて詳細に説明する。１は管材、３および４は溶
接ビードの凝固が終了した凝固部分、５および６
は溶接のアークにより溶融状態にある部分（以
下、溶融池という）を示す。 The reason why such pores are generated will be explained in detail with reference to FIG. 1 is a pipe material, 3 and 4 are solidified parts where the weld bead has finished solidifying, 5 and 6
indicates a portion that is in a molten state due to the welding arc (hereinafter referred to as a molten pool).
溶接位置が管材１の比較的上部にある場合は、
溶融池５の中に発生するガスは矢印の方向に容易
に上方に放出される。しかし、溶接位置が下部に
ある場合は、溶融池６の中に存在するガスは凝固
部分４および管材１が存在するために容易に放出
されない。 If the welding position is relatively at the top of the pipe material 1,
Gas generated in the molten pool 5 is easily released upward in the direction of the arrow. However, when the welding position is at the bottom, the gas present in the molten pool 6 is not easily released due to the presence of the solidified portion 4 and the tube material 1.
第３図は第２図におけるＡ−Ａ部分を示し、開
先および溶接による溶け込みの状況を示す。すな
わち、溶接の開先９が管材１の外面側に開いたＶ
またはＵ型を有するために、溶接金属１０を形成
する場合の溶融池内のガスは上方に容易に放出さ
れない。このように溶接金属１０内のガスの放出
が十分に行われない状態で溶融池の凝固が進み、
したがつて、溶接金属１０内へ気孔の残存が生じ
ることになる。 FIG. 3 shows the A-A section in FIG. 2, and shows the groove and the state of penetration due to welding. In other words, the welding groove 9 is opened to the outer surface side of the pipe material 1.
Or, because of the U-shape, gas in the molten pool when forming the weld metal 10 is not easily released upward. In this way, the molten pool solidifies while the gas in the weld metal 10 is not sufficiently released.
Therefore, pores remain in the weld metal 10.
このような溶接部について、JIS・Z3105によ
る放射線検査を行うと多数の気孔が溶接金属１０
内に存在し、前記JIS・Z3105で規定される性能
を満足することができない。 When such welds are subjected to radiation inspection according to JIS/Z3105, a large number of pores are found in the weld metal.
Therefore, the performance specified in JIS Z3105 cannot be satisfied.
本発明の目的は、以上述べたAl管についての
円周溶接において、JIS・Z3105に規定されるよ
うな放射線試験における等級分類の規定値を満足
させる品質を得ることを目的としたものであり、
特に下部に発生する溶接部の気孔を解消する溶接
方法を提供することにある。
The purpose of the present invention is to obtain quality that satisfies the prescribed values for grading in radiation tests as specified in JIS Z3105 in circumferential welding of Al pipes as described above.
It is an object of the present invention to provide a welding method that eliminates pores that occur in the welded part, especially in the lower part.
本発明は、管固定方式で円周溶接を行うにあた
り、上記従来法において生じた不具合を解消する
ために、溶接のスタート位置を管円周の下点と
し、時計方向および反時計方向にそれぞれ上進溶
接を管外面から行い上点で溶接を終了する。さら
に、開先形状についても、管の外側から溶接する
にも拘らず管の内側に向つてＶ型またはＵ型形状
としたものである。これによつて、溶接金属内に
認められる気孔の発生原因となる溶接時の溶接金
属中に発生するガスを容易に放出させ、前記の不
具合を解消することができる。
In performing circumferential welding using a pipe fixing method, in order to eliminate the problems that occurred in the conventional method, the present invention sets the welding start position at the lower point of the pipe circumference, and moves upward in the clockwise and counterclockwise directions. Advance welding is performed from the outer surface of the pipe and welding is completed at the upper point. Furthermore, the groove shape is also V-shaped or U-shaped toward the inside of the tube, even though welding is performed from the outside of the tube. This makes it possible to easily release the gas generated in the weld metal during welding, which causes the formation of pores in the weld metal, thereby solving the above-mentioned problems.
以下、本発明を第４図ないし第７図により説明
する。すなわち、第４図に示すごとく、管材１に
対し溶接を溶接進行軌跡１１および１２で示すよ
うに時計位置で６時付近の下部から上方に向けて
左右両方向に進行し、最上部の０時の付近で終了
するような溶接方法である。このとき、第５図に
示すごとく溶接金属の溶融池１５および１６は常
に凝固部分１３および１４より上方にあり、溶融
池１５，１６内に発生するガスの放出は矢印のご
とく容易に行われる。
The present invention will be explained below with reference to FIGS. 4 to 7. That is, as shown in FIG. 4, welding is performed on the pipe material 1 in both left and right directions from the bottom around 6 o'clock at the clock position, as shown by welding progress trajectories 11 and 12, upwards, and at the top at 0 o'clock. This is a welding method that ends near the welding point. At this time, as shown in FIG. 5, the molten pools 15 and 16 of the weld metal are always above the solidified portions 13 and 14, and the gas generated in the molten pools 15 and 16 is easily released as shown by the arrows.
第５図におけるＢ−Ｂ部分の断面を第６図に概
念的に示す。すなわち、管材１に対し開先１７は
管材１の内面側に開くように設けることにより、
外面側から溶接を行つて溶接金属１８を形成する
場合その溶融池内に発生するガスは上方に容易に
放出される。 FIG. 6 conceptually shows a cross section taken along the line BB in FIG. 5. That is, by providing the groove 17 in the pipe material 1 so as to open toward the inner surface of the pipe material 1,
When welding is performed from the outside to form weld metal 18, gas generated within the molten pool is easily released upward.
このように、溶接の進行方向および開先形状を
従来の方法に対し改善することにより、JIS・
Z3105で規定されるAl管溶接部に対する放射線性
能は十分満足しうる品質を得ることができる。 In this way, by improving the welding direction and groove shape compared to the conventional method, we are able to
The radiation performance for Al pipe welds specified by Z3105 can be of sufficiently satisfactory quality.
本発明による一実施例を以下に述べる。管材は
JIS・Z4080に規定される種類5083の外径60mm、
板厚３mmを用い、溶接時の溶加材はJIS・Z3232、
A5183−WYの線径1.2mmを用いた。溶接条件は下
記のとおりである。 An embodiment according to the present invention will be described below. The pipe material
Type 5083 outer diameter 60mm specified in JIS Z4080,
The plate thickness is 3mm, and the filler metal used during welding is JIS/Z3232.
A5183-WY wire diameter 1.2 mm was used. The welding conditions are as follows.
溶接方法：テイグ溶接
溶接電流：140A
溶接電圧：16V
溶接速度：110mm／min
溶加材供給速度：280mm／min
極性：交流
タングステン電極径：3.2mm
アークシールドガス：純アルゴンガス
同上ガス供給量：12／min
開先形状：第７図のとおり
溶接進行方向：
反時計まわり上進溶接；溶接開始は７時位置
溶接終了は11時位置
時計まわり上進溶接；溶接開始は５時位置
溶接終了は１時位置
上記の条件で溶接を行つた後、溶接部について
JIS・Z3105（アルミニウムおよびアルミニウム合
金の放射線透過試験方法および等級分類方法）に
したがつて放射線透過試験を行つた結果、その等
級分類で規定される１級が得られた。Welding method: Teig welding Welding current: 140A Welding voltage: 16V Welding speed: 110mm/min Filler metal supply speed: 280mm/min Polarity: AC tungsten electrode diameter: 3.2mm Arc shielding gas: Pure argon gas Same as above Gas supply amount: 12 /min Groove shape: As shown in Figure 7 Welding progress direction: Counterclockwise upward welding; welding start is at 7 o'clock position Welding end is at 11 o'clock position Clockwise upward welding; welding start is at 5 o'clock position Welding end is 1 Time position After welding under the above conditions, the welded area
As a result of conducting a radiographic test in accordance with JIS Z3105 (Radioscopic testing method and grading method for aluminum and aluminum alloys), a grade 1 was obtained as specified by the grading classification.
さらに、以上述べた方法を工場のAl配管溶接
に適用し約50個所について放射線透過試験を行つ
た結果、いずれも前記等級分類において１級が得
られた。 Furthermore, the method described above was applied to Al pipe welding in a factory, and radiation transmission tests were conducted on approximately 50 locations, and as a result, all of the welds were rated 1st grade in the above classification.
本発明によれば、管の内面側方向に拡がりを持
つ開先形状を用い、かつ、管内周の下点から上点
に向けて時計方向および反時計方向にそれぞれ上
進溶接を管外面側から行うことで、アルミニウム
管の溶接において高品質の溶接部を容易に得るこ
とができ、溶接施工技術の改善の点で大きく貢献
するものである。
According to the present invention, a groove shape that expands toward the inner surface of the tube is used, and upward welding is performed from the outer surface of the tube in clockwise and counterclockwise directions from the lower point to the upper point on the inner circumference of the tube. By doing so, high-quality welds can be easily obtained when welding aluminum pipes, and this will greatly contribute to the improvement of welding construction technology.
第１図は従来の溶接方法を説明するための管の
断面図、第２図はその溶接施工の概念を示す説明
図、第３図は第２図のＡ−Ａ線断面図、第４図は
本発明を説明するための管の断面図、第５図はそ
の溶接施工の概念を示す説明図、第６図は第５図
のＢ−Ｂ線断面図、第７図は開先の断面図であ
る。
１……管材、２……溶接進行軌跡、３，４……
凝固部分、５，６……溶融池、９……開先、１０
……溶接金属、１１，１２……溶接進行軌跡、１
３，１４……凝固部分、１５，１６……溶融池、
１７……開先、１８……溶接金属。
Figure 1 is a sectional view of a pipe to explain the conventional welding method, Figure 2 is an explanatory diagram showing the concept of welding, Figure 3 is a sectional view taken along line A-A in Figure 2, and Figure 4. is a sectional view of a pipe for explaining the present invention, FIG. 5 is an explanatory diagram showing the concept of welding construction, FIG. 6 is a sectional view taken along line B-B in FIG. 5, and FIG. 7 is a cross-sectional view of a groove. It is a diagram. 1... Pipe material, 2... Welding progress trajectory, 3, 4...
Solidified portion, 5, 6... Molten pool, 9... Bevel, 10
...Weld metal, 11,12...Welding progress trajectory, 1
3, 14... solidified part, 15, 16... molten pool,
17...Bevel, 18...Weld metal.
Claims (1)
するための円周溶接方法において、 前記アルミニウム管の内面側方向に拡がりを持
つ開先形状を用い、かつ、管内周の下点から上点
に向けて時計方向および反時計方向にそれぞれ上
進溶接を管外面側から行うことを特徴とするアル
ミニウム管の溶接方法。[Claims] 1. A circumferential welding method for joining aluminum pipes that are fixed substantially horizontally, using a groove shape that expands in the direction of the inner surface of the aluminum pipe, and at the lower point of the inner circumference of the pipe. A method for welding aluminum pipes, characterized in that upward welding is performed from the outer surface of the pipe clockwise and counterclockwise toward the upper point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2160884A JPS60166169A (en) | 1984-02-10 | 1984-02-10 | Welding method of aluminum pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2160884A JPS60166169A (en) | 1984-02-10 | 1984-02-10 | Welding method of aluminum pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60166169A JPS60166169A (en) | 1985-08-29 |
| JPH0254187B2 true JPH0254187B2 (en) | 1990-11-20 |
Family
ID=12059747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2160884A Granted JPS60166169A (en) | 1984-02-10 | 1984-02-10 | Welding method of aluminum pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60166169A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61186173A (en) * | 1985-02-15 | 1986-08-19 | Hitachi Seiko Ltd | Butt welding method |
| DE19724434C1 (en) * | 1997-06-10 | 1998-07-16 | Friedel Paul Kalberg | Arc welding method for vertically oriented closed two-dimensional seam esp. pipes prepared for round seams |
| CN102837115A (en) * | 2012-09-27 | 2012-12-26 | 中国化学工程第三建设有限公司 | Seamless welding method for aluminum and aluminum alloy or pipeline |
| CN107225310A (en) * | 2017-06-22 | 2017-10-03 | 山东电力建设第工程公司 | Aluminium-alloy pipe argon arc welding process optimization method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49115045A (en) * | 1973-03-08 | 1974-11-02 | ||
| JPS516146A (en) * | 1974-07-05 | 1976-01-19 | Matsushita Electric Ind Co Ltd | JIDOYO SETSUHOHO |
-
1984
- 1984-02-10 JP JP2160884A patent/JPS60166169A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49115045A (en) * | 1973-03-08 | 1974-11-02 | ||
| JPS516146A (en) * | 1974-07-05 | 1976-01-19 | Matsushita Electric Ind Co Ltd | JIDOYO SETSUHOHO |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60166169A (en) | 1985-08-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |