JP2689752B2 - AC arc welding method - Google Patents
AC arc welding methodInfo
- Publication number
- JP2689752B2 JP2689752B2 JP3076150A JP7615091A JP2689752B2 JP 2689752 B2 JP2689752 B2 JP 2689752B2 JP 3076150 A JP3076150 A JP 3076150A JP 7615091 A JP7615091 A JP 7615091A JP 2689752 B2 JP2689752 B2 JP 2689752B2
- Authority
- JP
- Japan
- Prior art keywords
- section
- current
- arc
- welding
- time ratio
- 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
Landscapes
- Arc Welding Control (AREA)
- Arc Welding In General (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、インバータ装置を用い
て直流を交流に変換して溶接を行う交流アーク溶接法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AC arc welding method for welding by converting DC into AC by using an inverter device.
【０００２】[0002]
【従来の技術】従来の交流アーク溶接では、アークの指
向性を高めるために、図２（ａ）に示すようなＥＰ（電
極プラス）区間とＥＮ（電極マイナス）区間の等しい溶
接電流波形のＥＮ区間の時間比率を、図２（ｂ）及び
（ｃ）に示すようにＥＰ区間の時間比率より大きくする
方法が採用されてきた。2. Description of the Related Art In conventional AC arc welding, in order to improve the directivity of the arc, an EN (electrode plus) section and an EN (electrode minus) section having the same welding current waveform as shown in FIG. A method has been adopted in which the time ratio of the section is made larger than the time ratio of the EP section as shown in FIGS. 2B and 2C.
【０００３】[0003]
【発明が解決しようとする課題】一般にアルミニウムの
溶接には、クリーニング効果を必要とするため交流アー
ク溶接法が用いられており、クリーニング効果は、交流
の１周期中のＥＰの時間比率が大きいほど高いことが知
られている。Generally, for welding aluminum, the AC arc welding method is used because a cleaning effect is required. The cleaning effect is larger as the time ratio of EP in one cycle of AC is larger. It is known to be expensive.
【０００４】一方、上述したように従来の交流アーク溶
接法では、アークの指向性を高めるために、交流の１周
期中のＥＮの時間比率を大きくしているため、クリーニ
ング効果が低下するという結果をもたらしていた。その
ため、溶接結果に悪影響を及ぼさない程度のクリーニン
グ効果を保つようなＥＮ区間の時間比率にすると、必要
なだけのアークの指向性が得られないという問題があっ
た。On the other hand, as described above, in the conventional AC arc welding method, since the time ratio of EN in one cycle of AC is increased in order to improve the directivity of the arc, the cleaning effect is lowered. Was brought. Therefore, when the time ratio of the EN section is set so as to maintain the cleaning effect to the extent that the welding result is not adversely affected, there is a problem that the necessary arc directivity cannot be obtained.
【０００５】本発明はこの問題を解決しようとするもの
で、良好な溶接結果が得られるだけのクリーニング効果
が維持され、かつ十分なアークの指向性が得られる交流
アーク溶接法を提供することを目的とする。The present invention is intended to solve this problem, and it is an object of the present invention to provide an AC arc welding method in which a cleaning effect sufficient to obtain a good welding result is maintained and a sufficient arc directivity is obtained. To aim.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に本発明では、直流を交流に変換させるインバータ装置
を用いて、電極−母材間に交流電流を供給して溶接する
交流アーク溶接法において、ＥＮ（電極マイナス）およ
びＥＰ（電極プラス）時の電流波形を交流に重畳した波
形として、このパルスのピーク値を、交流の１周期中に
占めるＥＮ（電極マイナス）区間の時間比率を小さくし
たときに前記時間比率を小さくする前より高くするよう
にしたものである。In order to achieve the above object, according to the present invention, an AC arc welding method is used in which an inverter device for converting a direct current into an alternating current is used to supply an alternating current between an electrode and a base material for welding. In, the current value waveforms at EN (electrode minus) and EP (electrode plus) are superimposed on the alternating current, and the peak value of this pulse is calculated during one cycle of the alternating current.
Reduce the time ratio of the occupied EN (electrode minus) section
In this case, the time ratio is set to be higher than before .
【０００７】[0007]
【作用】一般にアーク溶接においては、大電流時には電
磁ピンチ力により、アークの指向性が強くなることが知
られているが、上記手段によれば、クリーニング効果を
高めるためにＥＮの時間比率を低くしたとき重畳したパ
ルスのピーク値を大きくすることにより、パルス波形の
ピーク時の電磁ピンチ力によりアークの指向性が維持さ
れ、良好な溶接結果が得られるクリーニング効果を有
し、かつ十分なアークの指向性が得られる交流アーク溶
接法が実現できる。Generally, in arc welding, it is known that the directivity of the arc becomes strong due to the electromagnetic pinch force at the time of a large current. However, according to the above means, the time ratio of EN is lowered to enhance the cleaning effect. By increasing the peak value of the superimposed pulse at this time, the directivity of the arc is maintained by the electromagnetic pinch force at the peak of the pulse waveform, and a good welding result can be obtained. An AC arc welding method that can obtain directivity can be realized.
【０００８】[0008]
【実施例】図１（ａ）および（ｂ）に本発明の交流アー
ク溶接法に用いる溶接電流波形の一実施例を示す。図１
（ａ）及び（ｂ）においてＩは溶接電流の瞬間値、ｔは
時間、ＴａおよびＴｂはＥＮ区間の長さを示す時間、Ｈ
ａおよびＨｂは交流に重畳したパルス電流のピーク電流
値である。EXAMPLE FIGS. 1A and 1B show an example of a welding current waveform used in the AC arc welding method of the present invention. FIG.
In (a) and (b), I is the instantaneous value of the welding current, t is the time, Ta and Tb are the times indicating the length of the EN section, and H is H.
a and Hb are peak current values of the pulse current superimposed on the alternating current.
【０００９】本発明の実施例によれば、１周期における
ＥＮ区間の時間比率を図１（ａ）のＴａのように小さく
設定すればパルス電流はピーク値がＨａのように高くな
り、ＥＮ区間を図１（ｂ）のＴｂのように大きく設定す
ればパルス電流はピーク値がＨｂのように低くなるよう
に連動する。図１（ａ）の場合は高いピーク値による高
電流の電磁ピンチ力により、また図１（ｂ）の場合はＥ
Ｎ区間が長いことにより、どちらの場合も十分なアーク
の指向性が得られるので、ＥＮ区間の時間比率を、良好
な溶接結果を得るのに適したクリーニング効果が得られ
るように調整すれば、十分な指向性と良好なクリーニン
グ効果を容易に得ることができる。According to the embodiment of the present invention, if the time ratio of the EN section in one cycle is set small as Ta in FIG. 1A, the peak value of the pulse current becomes high as Ha, and the EN section becomes longer. 1 is set to be large like Tb in FIG. 1B, the pulse current is interlocked so that the peak value becomes low like Hb. In the case of FIG. 1 (a), a high current electromagnetic pinch force due to a high peak value, and in the case of FIG. 1 (b), E
Since the N section is long, sufficient arc directivity can be obtained in both cases, so if the time ratio of the EN section is adjusted so as to obtain a cleaning effect suitable for obtaining a good welding result, Sufficient directivity and good cleaning effect can be easily obtained.
【００１０】本発明の実施例では交流電流波形として矩
形波としたが正弦波など他の交流波形でもよく、また半
サイクル当り２つのパルス数を重畳させたが、重畳する
半サイクル当りのパルス数は２以外の数でもよい。ま
た、本発明の実施例では１周期におけるＥＮ区間の時間
比率の変化とパルスのピーク値の変化を連動させたが、
個別に調整しても差し支えないことはいうまでもない。In the embodiment of the present invention, a rectangular wave is used as the alternating current waveform, but other alternating current waveforms such as a sine wave may be used, and two pulses are superposed per half cycle. May be a number other than 2. In the embodiment of the present invention, the change of the time ratio of the EN section in one cycle and the change of the peak value of the pulse are linked.
It goes without saying that it can be adjusted individually.
【００１１】[0011]
【発明の効果】以上の説明からも明らかなように本発明
によれば、交流の溶接電流にパルスを重畳することによ
りアークの指向性を損うことなく、最適のクリーニング
効果が得られるように、１周期におけるＥＮ区間の時間
比率を選択することが可能となり、アルミニウム溶接の
溶接品質の向上に大きく寄与することができる。As is apparent from the above description, according to the present invention, by superimposing a pulse on an alternating welding current, an optimum cleaning effect can be obtained without impairing the directivity of the arc. It is possible to select the time ratio of the EN section in one cycle, which can greatly contribute to the improvement of the welding quality of aluminum welding.
【図１】（ａ）は矩形波交流にパルスを重畳した溶接電
流で１周期におけるＥＮ区間の時間比率が小さい場合の
波形図 （ｂ）は矩形波交流にパルスを重畳した溶接電流で１周
期におけるＥＮ区間の時間比率が大きい場合の波形図FIG. 1A is a welding current in which a pulse is superimposed on a rectangular wave AC, and a waveform diagram when the time ratio of an EN section in one cycle is small, and FIG. 1B is a welding current in which a pulse is superimposed on a rectangular wave AC for one cycle. Waveform diagram when the time ratio of the EN section is large in
【図２】（ａ）は矩形波交流の溶接電流で１周期におけ
るＥＮ区間とＥＰ区間の時間比率が等しい場合の波形図 （ｂ）は矩形波交流の溶接電流で１周期におけるＥＮ区
間の時間比率がＥＰ区間の時間比率より大きい場合の波
形図 （ｃ）は矩形波交流の溶接電流で１周期におけるＥＮ区
間の時間比率がＥＰ区間の時間比率よりさらに大きい場
合の波形図FIG. 2 (a) is a waveform diagram when a rectangular wave AC welding current has the same time ratio between the EN section and the EP section in one cycle, and (b) is a rectangular wave AC welding current in the EN section in one cycle. Waveform diagram when the ratio is larger than the time ratio of the EP section (c) is a waveform diagram when the time ratio of the EN section in one cycle is even larger than the time ratio of the EP section with a rectangular wave AC welding current
Ｔａ，Ｔｂ ＥＮ区間の長さを示す時間 Ｈａ，Ｈｂ 交流に重畳したパルス電流のピーク電流値 Ta, Tb Time indicating the length of EN section Ha, Hb Peak current value of pulse current superimposed on AC
Claims (1)
用いて、電極−母材間に交流電流を供給して溶接する交
流アーク溶接法において、ＥＮ（電極マイナス）および
ＥＰ（電極プラス）時の電流波形を交流にパルスに重畳
した波形として、交流の１周期におけるＥＮ（電極マイ
ナス）区間の時間比率を小さくした時にパルス電流のピ
ーク値を前記時間率を小さくする前より高くすることを
特徴とする交流アーク溶接法。1. An AC arc welding method for welding by supplying an AC current between an electrode and a base metal by using an inverter device for converting a DC to an AC, at the time of EN (electrode minus) and EP (electrode plus). As a waveform in which a current waveform is superimposed on an alternating current pulse, EN (electrode my
When the time ratio of the
The arc arc welding method is characterized in that the arc value is higher than that before the time rate is decreased .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3076150A JP2689752B2 (en) | 1991-04-09 | 1991-04-09 | AC arc welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3076150A JP2689752B2 (en) | 1991-04-09 | 1991-04-09 | AC arc welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04309468A JPH04309468A (en) | 1992-11-02 |
| JP2689752B2 true JP2689752B2 (en) | 1997-12-10 |
Family
ID=13596993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3076150A Expired - Lifetime JP2689752B2 (en) | 1991-04-09 | 1991-04-09 | AC arc welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2689752B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004056021A1 (en) * | 2004-11-16 | 2006-06-01 | Newfrey Llc, Newark | Method and apparatus for short-time arc welding |
| JP5120073B2 (en) * | 2008-05-30 | 2013-01-16 | 株式会社安川電機 | AC pulse arc welding apparatus and control method |
| JP5557238B2 (en) * | 2008-12-24 | 2014-07-23 | 株式会社ダイヘン | AC pulse arc welding control method |
| JP5349152B2 (en) * | 2009-06-15 | 2013-11-20 | 株式会社ダイヘン | AC pulse arc welding control method |
| WO2012085993A1 (en) | 2010-12-20 | 2012-06-28 | 株式会社ビジョナリスト | Image folder transmission/reproduction system and image folder transmission/reproduction program |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5154055A (en) * | 1974-11-08 | 1976-05-12 | Hitachi Ltd | Parusuyosetsukino kyokuseihantenkairo |
-
1991
- 1991-04-09 JP JP3076150A patent/JP2689752B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04309468A (en) | 1992-11-02 |
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