JP2005262250A - Pulsed mig welding method - Google Patents
Pulsed mig welding method Download PDFInfo
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- JP2005262250A JP2005262250A JP2004076261A JP2004076261A JP2005262250A JP 2005262250 A JP2005262250 A JP 2005262250A JP 2004076261 A JP2004076261 A JP 2004076261A JP 2004076261 A JP2004076261 A JP 2004076261A JP 2005262250 A JP2005262250 A JP 2005262250A
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- 238000003466 welding Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 11
- 229910001069 Ti alloy Inorganic materials 0.000 claims abstract description 11
- 230000007704 transition Effects 0.000 claims abstract description 3
- 230000000052 comparative effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
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- Arc Welding In General (AREA)
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Abstract
Description
この発明は、例えばTi又はTi合金などを溶接するパルスミグ溶接方法に関するものである。 The present invention relates to a pulsed MIG welding method for welding, for example, Ti or a Ti alloy.
従来、例えばTi又はTi合金の溶接は、一般的にティグ溶接によって行われており、軟鋼やステンレスに用いられる非パルスのマグ溶接やミグ溶接、またはパルスマグ溶接やパルスミグ溶接ではビ−ド形状又はスパッタ発生の制御が困難であるため、限られた溶接物、すなわち、ビ−ド形状、スパッタの母材への付着が問題にならない溶接物にのみ使用されていた。 Conventionally, for example, welding of Ti or Ti alloy is generally performed by TIG welding. In non-pulse MAG welding or MIG welding used for mild steel or stainless steel, or pulse MAG welding or pulse MIG welding, a bead shape or a spatter is used. Since the generation is difficult to control, it has been used only for limited welds, that is, welds in which bead shape and adhesion of spatter to the base material do not become a problem.
このような従来の消耗電極式パルスアーク溶接方法では、短絡発生時に短絡発生直前の溶接電流にかかわらず所定の第一の電流傾度で溶接電流を上昇して所定の電流値に達すると第一の電流傾度と異なる所定の第二の電流傾度で溶接電流を上昇させ、短絡開放時の溶接電流を低下させることでスパッタの抑制を行っていた(例えば特許文献1参照)。 In such a conventional consumable electrode type pulse arc welding method, when a short circuit occurs, the welding current is increased at a predetermined first current gradient regardless of the welding current immediately before the occurrence of the short circuit, and reaches a predetermined current value. Sputtering has been suppressed by increasing the welding current at a predetermined second current gradient different from the current gradient and decreasing the welding current when the short circuit is opened (see, for example, Patent Document 1).
ところが、Ti又はTi合金の溶接では短絡が発生しない場合でもスパッタが発生していたが、Ti又はTi合金を溶接する場合にはスパッタが溶接物に付着しやすく、また、Ti又はTi合金の使用目的から外観を綺麗に保つ必要があるなどの理由により、スパッタを極力減らす溶接が必要とされていた。 However, spatter is generated even when a short circuit does not occur in the welding of Ti or Ti alloy, but when Ti or Ti alloy is welded, the spatter easily adheres to the welded material, and the use of Ti or Ti alloy For reasons such as the need to keep the appearance clean for the purpose, welding that reduces spatter as much as possible was required.
ここで、一般的なパルス溶接での溶滴の溶接物への移行について図2を用いて説明する。図2は1パルス1溶滴離脱の溶接時のパルス波形と溶滴の離脱状況を示す図で、図に示すようにピーク電流期間でワイヤ1の先端の溶融部2にくびれを作り、ピーク期間終了後に溶滴がワイヤ1の先端から離脱し、溶接物3に溶滴が移行する。これを繰り返して溶接を行っていた。 Here, the transfer of droplets to a welded product in general pulse welding will be described with reference to FIG. FIG. 2 is a diagram showing a pulse waveform during welding of 1 pulse 1 droplet detachment and the state of droplet detachment. As shown in the figure, a constriction is formed in the melted portion 2 at the tip of the wire 1 during the peak current period, After the completion, the droplet is detached from the tip of the wire 1, and the droplet is transferred to the welded product 3. This was repeated for welding.
但し、実際には1パルスに複数の溶滴が離脱することもあり、また2パルスに1個の溶滴が離脱することもあった。その例を図3に示す。図3(a)は通常の大きさに近い溶滴の後に小さな溶滴が1パルスの間に続いて移行する場合を示し、図3(b)は通常の溶滴よりも小さな溶滴が1パルスの間に複数個の溶滴が移行する場合を示し、図3(c)は1つのパルスで溶滴が離脱せず2つ目のパルスで通常の溶滴の約2倍の大きさの溶滴が移行する場合を示すものである。
しかし、近年、Ti又はTi合金の溶接の要求が増えてきており、より能率が良いミグ溶接の要望が高まってきている。 However, in recent years, the demand for welding of Ti or Ti alloy has increased, and the demand for MIG welding with higher efficiency has increased.
そこで、本発明は、スパッタ発生が少ないパルスミグ溶接方法を提供することを目的とする。 Accordingly, an object of the present invention is to provide a pulsed MIG welding method that generates less spatter.
上記目的を達成するために本発明は、溶接電流にピーク電流期間とベース電流期間を交互に配するパルスミグ溶接方法において、ピーク電流期間からベース電流期間に移行する間に少なくとも1つのピーク電流とベース電流の中間値を持つ中間電流期間を設け、それぞれの電流期間が設定電流値のプラスマイナス20%の電流値である期間が少なくとも0.1msec.以上あり、ピーク電流値とベース電流値と少なくとも1つの中間電流値が、Id=ピーク電流値−ベース電流値、Im=中間電流値としたときに0.3Id以上0.5Id以下の条件を満たすものである。 In order to achieve the above object, the present invention provides a pulsed MIG welding method in which a peak current period and a base current period are alternately arranged in a welding current, and at least one peak current and a base current during the transition from the peak current period to the base current period. An intermediate current period having an intermediate value of current is provided, and a period in which each current period is a current value that is plus or minus 20% of the set current value is at least 0.1 msec. The peak current value, the base current value, and at least one intermediate current value satisfy the condition of 0.3Id or more and 0.5Id or less when Id = peak current value−base current value and Im = intermediate current value. Is.
本発明のパルスミグ溶接方法によればTi又はTi合金のミグ溶接でスパッタ発生の少ない溶接をすることができる。 According to the pulsed MIG welding method of the present invention, welding with less spatter generation can be performed by MIG welding of Ti or Ti alloy.
(実施の形態)
前記課題解決にあたっての本発明の取組み経過について以下に説明する。
(Embodiment)
The progress of the present invention in solving the problems will be described below.
本発明の発明者が検討を重ねたところ、Ti又はTi合金は、一般的に軟鋼やステンレスで行われている非パルスのマグ溶接、ミグ溶接や、パルスマグ溶接、パルスミグ溶接の電流波形では、スパッタ発生を抑制することができないことがわかった。 When the inventors of the present invention have repeatedly studied, Ti or Ti alloy is generally sputtered in the current waveform of non-pulse MAG welding, MIG welding, pulse MAG welding, or pulse MIG welding, which is generally performed with mild steel or stainless steel. It turned out that generation | occurrence | production cannot be suppressed.
そこで、溶滴のワイヤ先端からの離脱現象を1秒間に2000コマを撮影できる高速ビデオを用い、溶接電流の波形について詳細な検討を行った結果、図1(a)、(b)に示す中間電流期間を設けることで安定した溶滴離脱を行えることがわかった。 Therefore, as a result of detailed examination of the waveform of the welding current using a high-speed video capable of photographing 2000 frames per second of the phenomenon of the detachment of the droplet from the wire tip, the intermediate shown in FIGS. 1 (a) and 1 (b) is obtained. It was found that stable droplet detachment can be achieved by providing a current period.
例えば、図1(a)のように溶接電流のパルス波形として、ピーク電流値を溶接電流として出力するピーク電流期間と、ベース電流値を溶接電流として出力するベース電流期間と、これらピーク電流期間とベース電流期間の間にピーク電流値とベース電流値の間の中間値の電流値を溶接電流として出力する中間電流期間を設け、これら各電流期間を交互に繰り返す制御を行う。 For example, as shown in FIG. 1A, as a welding current pulse waveform, a peak current period in which a peak current value is output as a welding current, a base current period in which a base current value is output as a welding current, and these peak current periods During the base current period, an intermediate current period for outputting an intermediate current value between the peak current value and the base current value as a welding current is provided, and control is performed to alternately repeat these current periods.
また、 図1(b)のようにピーク電流期間とベース電流期間の間に設ける中間電流期間を複数設けてもよく、その場合はそれぞれの中間電流値の組み合わせとして中間電流値を次第に低下させる制御を行う。 Further, as shown in FIG. 1B, a plurality of intermediate current periods provided between the peak current period and the base current period may be provided, and in that case, control for gradually decreasing the intermediate current value as a combination of the respective intermediate current values. I do.
このような、ピーク電流期間、中間電流期間、ベース電流期間については、それぞれの電流期間が設定電流値の±20%の電流値である期間が少なくとも0.1msec.以上あり、ピーク電流値とベース電流値と少なくとも1つの中間電流値が、Id=ピーク電流値−ベース電流値、Im=中間電流値としたときに0.3Id以上0.5Id以下の条件を満たすものの範囲で、その溶接物やワイヤ径、溶接形状に応じた最適な条件を決める。 As for such peak current period, intermediate current period, and base current period, the period in which each current period is a current value of ± 20% of the set current value is at least 0.1 msec. The peak current value, the base current value, and at least one intermediate current value satisfy the condition of 0.3Id or more and 0.5Id or less when Id = peak current value−base current value and Im = intermediate current value. The optimum conditions are determined according to the welded material, wire diameter, and welding shape.
前提条件として表1に示す条件で、その他の溶接条件を変えて実験した結果を表2から表5に示す。 Tables 2 to 5 show the results of experiments with other welding conditions changed under the conditions shown in Table 1 as preconditions.
なお、スパッタ発生は溶接物にスパッタが付着する個数が溶接長100mm当たり2個以下を○、2個を越えるものを×とした。 In addition, spatter generation | occurrence | production was set as (circle) when the number of spatter | spatters adhering to a welding thing is 2 or less per 100 mm of welding length, and exceeded 2 pieces.
実施例1〜6は、本発明の範囲に入っているので、スパッタ発生結果が良好であった。 Since Examples 1 to 6 were within the scope of the present invention, the spatter generation results were good.
比較例7は、中間電流期間が無いためスパッタ発生結果が悪かった。 In Comparative Example 7, the spatter generation result was bad because there was no intermediate current period.
比較例8は、中間電流期間はあるものの中間電流値が高いためスパッタ発生結果が悪かった。 In Comparative Example 8, although there was an intermediate current period, the intermediate current value was high, so the spatter generation result was bad.
比較例9は、中間電流期間はあるものの中間電流値が低いためスパッタ発生結果が悪かった。 In Comparative Example 9, although there was an intermediate current period, the intermediate current value was low, so the spatter generation result was bad.
比較例10は、中間電流期間はあるものの中間電流値が高いためスパッタ発生結果が悪かった。 In Comparative Example 10, although there was an intermediate current period, the intermediate current value was high, so the spatter generation result was bad.
比較例11は、中間電流期間はあるものの中間電流値が高いためスパッタ発生結果が悪かった。 In Comparative Example 11, although the intermediate current period was present, the intermediate current value was high, so the spatter generation result was poor.
比較例12は、中間電流期間はあるものの中間電流値が低いためスパッタ発生結果が悪かった。 In Comparative Example 12, although the intermediate current period was, the intermediate current value was low, so the spatter generation result was bad.
本発明のパルスミグ溶接方法によれば、Ti又はTi合金のミグ溶接でスパッタ発生の少ない溶接をすることができ、産業上有用である。 According to the pulsed MIG welding method of the present invention, welding with less spatter generation can be achieved by MIG welding of Ti or Ti alloy, which is industrially useful.
1 ワイヤ
2 ワイヤ先端部の溶融部
3 溶接物
DESCRIPTION OF SYMBOLS 1 Wire 2 Fusion | melting part of wire front-end | tip part 3 Welding thing
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009297738A (en) * | 2008-06-12 | 2009-12-24 | Taiyo Nippon Sanso Corp | Shielding gas for arc brazing and arc brazing method using the same |
EP2210694A1 (en) * | 2009-01-21 | 2010-07-28 | Daihen Corporation | Pulse arc welding method |
JP7508016B1 (ja) | 2023-04-25 | 2024-07-01 | Jfeスチール株式会社 | アーク溶接継手およびその製造方法 |
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JPS54107447A (en) * | 1978-02-10 | 1979-08-23 | Hitachi Ltd | High pulse mig welding controller |
JPS6056486A (en) * | 1983-09-09 | 1985-04-02 | Hitachi Seiko Ltd | Arc welding method using consumable electrode |
JPS6117369A (en) * | 1984-06-30 | 1986-01-25 | Mitsubishi Heavy Ind Ltd | Pulse arc welding |
JPS6415285A (en) * | 1987-07-09 | 1989-01-19 | Matsushita Electric Ind Co Ltd | Pulse arc welding machine |
JPH08267239A (en) * | 1995-03-29 | 1996-10-15 | Kobe Steel Ltd | Output control method of power source for consumable electrode type gas shielded pulsed arc welding |
JP2000280076A (en) * | 1999-03-31 | 2000-10-10 | Daihen Corp | Arc welding method of titanium and titanium alloy |
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2004
- 2004-03-17 JP JP2004076261A patent/JP4569138B2/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54107447A (en) * | 1978-02-10 | 1979-08-23 | Hitachi Ltd | High pulse mig welding controller |
JPS6056486A (en) * | 1983-09-09 | 1985-04-02 | Hitachi Seiko Ltd | Arc welding method using consumable electrode |
JPS6117369A (en) * | 1984-06-30 | 1986-01-25 | Mitsubishi Heavy Ind Ltd | Pulse arc welding |
JPS6415285A (en) * | 1987-07-09 | 1989-01-19 | Matsushita Electric Ind Co Ltd | Pulse arc welding machine |
JPH08267239A (en) * | 1995-03-29 | 1996-10-15 | Kobe Steel Ltd | Output control method of power source for consumable electrode type gas shielded pulsed arc welding |
JP2000280076A (en) * | 1999-03-31 | 2000-10-10 | Daihen Corp | Arc welding method of titanium and titanium alloy |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009297738A (en) * | 2008-06-12 | 2009-12-24 | Taiyo Nippon Sanso Corp | Shielding gas for arc brazing and arc brazing method using the same |
EP2210694A1 (en) * | 2009-01-21 | 2010-07-28 | Daihen Corporation | Pulse arc welding method |
CN101954530A (en) * | 2009-01-21 | 2011-01-26 | 株式会社大亨 | Pulse arc welding method |
US8203100B2 (en) | 2009-01-21 | 2012-06-19 | Daihen Corporation | Pulse arc welding method |
EP2210694B1 (en) | 2009-01-21 | 2016-08-31 | Daihen Corporation | Pulse arc welding method |
JP7508016B1 (ja) | 2023-04-25 | 2024-07-01 | Jfeスチール株式会社 | アーク溶接継手およびその製造方法 |
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