JPS6160268A - High speed tack welding - Google Patents
High speed tack weldingInfo
- Publication number
- JPS6160268A JPS6160268A JP18069784A JP18069784A JPS6160268A JP S6160268 A JPS6160268 A JP S6160268A JP 18069784 A JP18069784 A JP 18069784A JP 18069784 A JP18069784 A JP 18069784A JP S6160268 A JPS6160268 A JP S6160268A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- electrode
- speed
- weld
- current
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
Description
【発明の詳細な説明】
（発明の技術分野）
この発明は本溶接に先立って行なう仮付溶接を高速度で
連続的に行なう高速仮付溶接方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a high-speed tack welding method for continuously performing tack welding at high speed prior to main welding.
（従来技術）
仮付溶接を高速で行なう場合は第２図に示すように先行
電極１と後行電極２を用い、先行電極１のアーク３によ
り生じた溶融金属４が後方へ流出することを後行電極２
のアーク５で塞き止めながら溶接ビードを形成して行な
っている。(Prior art) When performing tack welding at high speed, a leading electrode 1 and a trailing electrode 2 are used as shown in FIG. 2 to prevent the molten metal 4 generated by the arc 3 of the leading electrode 1 from flowing backward. Trailing electrode 2
This is done by forming a weld bead while blocking the arc 5.
従来、上記２電極を用いた仮付溶接は、溶接開始時に、
第６図に示すように先行電極１の溶接電流工及び先行電
極１と後行電極２の電極間隔りを溶接条件に合った所定
の値ｌ及びり、に設定し、溶接開始と同時に溶接速度Ｖ
を所定の速度■、に合わせる方法で溶接を行なっている
。Conventionally, in tack welding using the above two electrodes, at the start of welding,
As shown in Fig. 6, the welding current of the leading electrode 1 and the electrode spacing between the leading electrode 1 and the trailing electrode 2 are set to a predetermined value l that matches the welding conditions, and the welding speed is set at the same time as welding starts. V
Welding is performed by adjusting the speed to a predetermined speed.
この従来の仮付溶接方法によると、所定の溶接速度ηが
遅い場合には問題がなく安定した溶接ビードが形成され
る。According to this conventional tack welding method, when the predetermined welding speed η is slow, a stable weld bead is formed without any problems.
しかし高速度で仮付溶接を行なう場合は溶接開始時の短
時間例えば１〜２秒位の間に溶接速度ＶをＯｍＡ−から
所定の溶接速度ｖ８例えば１０ｍ／分に変える必要があ
る。この場合、先行電極１の溶接電流Ｉを溶接速度が最
高となる所定の溶接速度ｖ１になったときに必要とする
溶着量を得るための電流値Ｉｔに設定すると、溶融金属
が開先内からあふれたり、溶は落ちを生じることがある
。また溶融金属の流れが不安定となり、仮付溶接ののど
厚が平均していないと、本溶接を行なったときに溶込み
深さに不連続を生じ、溶接欠陥が生じるという問題点が
あった。However, when performing tack welding at high speed, it is necessary to change the welding speed V from OmA- to a predetermined welding speed V8, for example 10 m/min, within a short period of time, for example 1 to 2 seconds, at the start of welding. In this case, if the welding current I of the preceding electrode 1 is set to the current value It to obtain the required amount of welding when the welding speed reaches the maximum predetermined welding speed v1, the molten metal will flow from the inside of the groove. Overflowing or dripping may occur. In addition, if the flow of molten metal becomes unstable and the throat thickness of tack welding is not even, there is a problem that discontinuity will occur in the penetration depth when main welding is performed, resulting in weld defects. .
（発明の目的）
この発明は上記問題点を改善し、安定したビードを高速
度で連続的に形成する高速仮付溶接方法を提案すること
を目的とするものである。(Objective of the Invention) An object of the present invention is to improve the above-mentioned problems and to propose a high-speed tack welding method that continuously forms stable beads at high speed.
（発明の概要）
この発明の高速仮付溶接方法は複数の電極を使用し溶接
電流、電極間隔及び溶接速度を所定の値に設定して母材
の仮付溶接を行なう溶接方法において、溶接開始と同時
に溶接速度を検出し、検出した溶接速度の変化に応じて
先行電極の溶接電流及び電極間隔を変更することにより
溶接速度に応じた溶着量により溶接ビードを連続して形
成させる方法である。(Summary of the Invention) The high-speed tack welding method of the present invention is a welding method that uses a plurality of electrodes and sets the welding current, electrode spacing, and welding speed to predetermined values to perform tack welding of base metals. At the same time, the welding speed is detected, and the welding current of the preceding electrode and the electrode spacing are changed in accordance with the detected change in the welding speed, thereby continuously forming a weld bead with an amount of welding that corresponds to the welding speed.
複数の電極を継手方向に並置して使用する多電極溶接法
において仮付溶接を行なうときに、溶着量は先行電極の
溶接電流と溶接速度によって決まる。したがって必要と
する溶着量を得るためにこの発明においては、溶接速度
の遅い溶接開始時には先行電極の溶接電流も低い値にし
、溶接速度が早くなるにしたがって先行電極の溶接電流
を増加させる。When performing tack welding in a multi-electrode welding method in which multiple electrodes are used side by side in the joint direction, the amount of welding is determined by the welding current and welding speed of the preceding electrode. Therefore, in order to obtain the required amount of welding, in this invention, the welding current of the preceding electrode is set to a low value when welding is started at a slow welding speed, and as the welding speed becomes faster, the welding current of the preceding electrode is increased.
また先行電極と後行電極の電極間隔は溶接ビードの連続
に大きく寄与する。すなわち先行電極の溶接電流が低場
合は溶融金属の流れもゆっくりであり、後行電極で塞き
止める位置も前で良い。しかし溶接速度が増し、このた
め先行電極の溶接電流も高くなるとアーク力が増加し溶
融金属の流れも早くなるため、後行電極の位置も変える
必要がある。このためこの発明においては溶接速度を検
出し、この溶接速度の変化に応じて電極間隔を変化させ
る制御を行ない連続した溶接ビードを形成する。Furthermore, the electrode spacing between the leading electrode and the trailing electrode greatly contributes to the continuity of the weld bead. That is, when the welding current of the leading electrode is low, the flow of molten metal is slow, and the position where the trailing electrode blocks it may be at the front. However, as the welding speed increases and therefore the welding current of the leading electrode increases, the arc force increases and the flow of molten metal becomes faster, so it is necessary to change the position of the trailing electrode. Therefore, in the present invention, the welding speed is detected and control is performed to change the electrode spacing in accordance with the change in the welding speed to form a continuous weld bead.
（発明の実施例）
第１図はこの発明の一実施例における溶接速度ｖ１先行
電極の溶接電流工及び電極間隔りの変化特性を示す。図
において溶接速度Ｖ、は溶接速度の最大値を示し、１．
及びり、は溶接速度ｖｉに対応した先行電極の溶接電流
値及び電極間隔の値を示す。(Embodiment of the Invention) FIG. 1 shows the change characteristics of the welding current and electrode spacing of the welding speed v1 leading electrode in an embodiment of the invention. In the figure, welding speed V indicates the maximum value of welding speed; 1.
and indicate the welding current value of the preceding electrode and the value of the electrode spacing corresponding to the welding speed vi.
第２図に示すように２電極を用いて高速で仮付溶接を行
なう場合の溶接速度の最大値は約１０ｍ／分程度となり
、この溶接速度に対応する先行電極の溶接電流■、は約
１２０ＯＡ、電極間隔をま約３０闇程度となる。なお後
行電極の溶接電流をま溶融金属を塞き止めるのに必要な
一定値である。As shown in Figure 2, when performing tack welding at high speed using two electrodes, the maximum welding speed is approximately 10 m/min, and the welding current of the preceding electrode corresponding to this welding speed is approximately 120 OA. , the electrode spacing is approximately 30 mm. Note that this is a constant value necessary to block the molten metal from the welding current of the trailing electrode.
溶接開始に際しては先行電極の溶接開始時の溶接電流Ｉ
。及び溶接開始時の電極間隔り。を例え番ず■。When starting welding, welding current I at the time of starting welding of the preceding electrode
. and electrode spacing at the start of welding. Illustrated by ■.
＝ ６０ ＯＡ−Ｄｏ＝ ２０霞と設定し、先行電極と
後行電極を備えた溶接装置を搭載した台車あるし１１ま
母材を移動して溶接速度■を０ｔｎＺ分から次第に増加
し所定の溶接速度■、に達するようにして仮付溶接を行
なう。この場合、変化する溶接速度Ｖを回転速度計で検
出し、この溶接速度Ｖに応じて第１図に示すように先行
電極の溶接電流工及び電極間隔りを変化させて仮付溶接
を行し１、溶接速度Ｖが所定の溶接速度Ｖ、に達した後
はこの溶接速度■、に対応した先行電極の溶接電流１１
及び電極間隔り、により高速で母材の仮付溶接を行なう
。した力（つて必要とする溶着量を連続して得ること力
（できる。= 60 OA-Do = 20 haze, move the base metal using a cart equipped with a welding device equipped with a leading electrode and a trailing electrode, and gradually increase the welding speed ■ from 0tnZ to the predetermined welding speed. ■ Carry out tack welding so that it reaches . In this case, the changing welding speed V is detected by a tachometer, and tack welding is performed by changing the welding current of the preceding electrode and the electrode spacing as shown in Figure 1 according to this welding speed V. 1. After the welding speed V reaches the predetermined welding speed V, the welding current 11 of the preceding electrode corresponding to this welding speed ■
and electrode spacing, tack welding of the base metal can be performed at high speed. It is possible to continuously obtain the required amount of welding by applying a certain amount of force.
（発明の効果）
この発明は以上説明したように、溶接速度の変化に応じ
て先行電極の溶接電流及び電極間隔を変化させることか
ら、一定の溶着量を連続して得ることができ、く特に溶
接開始時における溶融金属の開先内からのあぶれや、溶
は落ち等を防止することができ、安定したビードを連続
して形成することができる。このため本溶接の際、溶接
線ならいが容易になると共に溶接欠陥発生も防止するこ
とができ、大径鋼管の縦シーム溶接、造船の片面溶接等
の向上を図ることができる。(Effects of the Invention) As explained above, the present invention changes the welding current of the preceding electrode and the electrode spacing according to changes in the welding speed, so that a constant amount of welding can be continuously obtained, and especially It is possible to prevent scorching of molten metal from within the groove and dripping of molten metal at the start of welding, and it is possible to continuously form a stable bead. Therefore, during actual welding, it becomes easy to follow the weld line and prevent welding defects from occurring, making it possible to improve vertical seam welding of large-diameter steel pipes, single-sided welding in shipbuilding, etc.
第１図はこの発明の実施例の溶接速度、先行電極の溶接
電流及び電極間隔の変化特性図、第２図は２電極溶接法
の電極配置図、第３図は従来の溶接速度、先行電極の溶
接電流及び電極間隔の特性図である。
１・・・先行電極、２・・・後行電極、６．５・・・ア
ーク、４・・・溶融金属、■・・・溶接速度、■・・・
先行電極の溶接電流、Ｄ・・・電極間隔。
代理人 弁理士 木 村 三 朗
（力
第２図
！子関Fig. 1 is a characteristic diagram of changes in welding speed, welding current of the leading electrode, and electrode spacing in an embodiment of the present invention, Fig. 2 is an electrode arrangement diagram of the two-electrode welding method, and Fig. 3 is a diagram showing the welding speed and the welding current of the leading electrode in the conventional method. FIG. 3 is a characteristic diagram of welding current and electrode spacing. 1... Leading electrode, 2... Trailing electrode, 6.5... Arc, 4... Molten metal, ■... Welding speed, ■...
Welding current of the preceding electrode, D...electrode spacing. Agent Patent Attorney Sanro Kimura (Power 2nd figure! Shiseki
Claims (1)
を所定の値に設定して母材の仮付溶接を行なう溶接方法
において、溶接開始と同時に溶接速度を検出し、該溶接
速度の変化に応じて先行電極の溶接電流及び電極間隔を
変化させる制御を行なうことを特徴とした高速仮付溶接
方法。In a welding method that uses multiple electrodes and performs tack welding of the base metal by setting the welding current, electrode spacing, and welding speed to predetermined values, the welding speed is detected at the same time as welding starts, and the welding speed is detected based on changes in the welding speed. A high-speed tack welding method characterized by controlling the welding current of the preceding electrode and the electrode interval to be changed accordingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18069784A JPS6160268A (en) | 1984-08-31 | 1984-08-31 | High speed tack welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18069784A JPS6160268A (en) | 1984-08-31 | 1984-08-31 | High speed tack welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6160268A true JPS6160268A (en) | 1986-03-27 |
| JPH0242028B2 JPH0242028B2 (en) | 1990-09-20 |
Family
ID=16087724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18069784A Granted JPS6160268A (en) | 1984-08-31 | 1984-08-31 | High speed tack welding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6160268A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111683781A (en) * | 2018-01-31 | 2020-09-18 | 株式会社神户制钢所 | Single-side submerged arc welding method and single-side submerged arc welding device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5148739A (en) * | 1974-10-24 | 1976-04-27 | Kawasaki Steel Co | KOSOKUDONIDENKYOKUTANSANGASUAAKUYOSETSUHO |
| JPS5548909A (en) * | 1978-10-05 | 1980-04-08 | Toshiba Corp | Assembling of high current transformer |
-
1984
- 1984-08-31 JP JP18069784A patent/JPS6160268A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5148739A (en) * | 1974-10-24 | 1976-04-27 | Kawasaki Steel Co | KOSOKUDONIDENKYOKUTANSANGASUAAKUYOSETSUHO |
| JPS5548909A (en) * | 1978-10-05 | 1980-04-08 | Toshiba Corp | Assembling of high current transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111683781A (en) * | 2018-01-31 | 2020-09-18 | 株式会社神户制钢所 | Single-side submerged arc welding method and single-side submerged arc welding device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0242028B2 (en) | 1990-09-20 |
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