JPH01150469A - Ac arc welding power source - Google Patents
Ac arc welding power sourceInfo
- Publication number
- JPH01150469A JPH01150469A JP30900987A JP30900987A JPH01150469A JP H01150469 A JPH01150469 A JP H01150469A JP 30900987 A JP30900987 A JP 30900987A JP 30900987 A JP30900987 A JP 30900987A JP H01150469 A JPH01150469 A JP H01150469A
- Authority
- JP
- Japan
- Prior art keywords
- current
- arc
- polarity
- reverse polarity
- period
- 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
- 238000003466 welding Methods 0.000 title claims abstract description 17
- 239000010953 base metal Substances 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
Landscapes
- Arc Welding Control (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は逆極性期間にパルスアークを有する交流アーク
溶接電源に関するものでおる。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an alternating current arc welding power source having a pulsed arc during the reverse polarity period.
従来の技術
従来の技術では、パルス電流がワイヤ全溶融させるピー
ク値が臨界電流以下の正極性パルス電流部分と、これに
続くピーク値が、臨界電流以上である逆極性パルス電流
を逆極性ベース電流に重畳させることによって交流パル
スアークを形成するものがろる（特開昭５７−６６１６
５号公報）０この交流パルスアークによる溶接電流波形
を第３図ａに示す。Conventional technology In the conventional technology, a pulse current has a positive polarity pulse current part whose peak value is less than the critical current, in which the pulse current melts the entire wire, and a reverse polarity pulse current part, whose peak value is equal to or higher than the critical current, and a reverse polarity base current part, where the peak value is equal to or higher than the critical current. An alternating current pulse arc is formed by superimposing the
5) The welding current waveform due to this AC pulsed arc is shown in FIG. 3a.
発明が解決しようとする問題点
第３図乙に示すような溶接電流波形による溶接では、正
極性アークから逆極性アークに極性が反転する際、溶接
電流の変化量が大きくなり、第３図すに示すように再点
弧時には電圧が高くなることから電流と電圧の積による
エネルギーが大きくなるために、そのときに発生する溶
接音が非常（で大きくなってしまう０その結果、作業環
境が悪くなり溶接作業性が著しく低下する。Problems to be Solved by the Invention In welding using a welding current waveform as shown in Figure 3 B, when the polarity is reversed from a positive polarity arc to a reverse polarity arc, the amount of change in welding current becomes large, resulting in the problem shown in Figure 3. As shown in Fig. 2, the voltage increases during restriking, so the energy due to the product of current and voltage increases, making the welding noise that occurs at that time extremely loud (0).As a result, the working environment is poor. As a result, welding workability is significantly reduced.
問題点を解決するための手段
本発明は前記問題点全解決するために電流が電極から母
材の方向へ流れピーク電流値がワイヤを溶融きせる臨界
電流以上のパルス電流とアークを維持するベース電流か
らなる逆極性アークと電流が母材から電極の方向へ流れ
アークを維持するベース電流からなる正極性アークの両
極性アークからなる交流アーク溶接電源において、正極
性アークから逆極性アークに極性が反転した後、逆極性
ベース電流によるアークを発生させ一定期間遅らせて逆
極性パルス電流によるアークを発生させ、その後再度逆
極性ベース電流を通電した後に正極性ベース電流に極性
反転を行なうことを特徴とするものである。Means for Solving the Problems In order to solve all of the above problems, the present invention provides a pulse current in which the current flows from the electrode toward the base material and whose peak current value exceeds the critical current that melts the wire, and a base current that maintains the arc. In an AC arc welding power source, the polarity is reversed from a positive arc to a reverse polarity arc, which consists of a bipolar arc, a positive arc consisting of a base current that flows from the base metal to the electrode, and a base current that maintains the arc. After that, an arc is generated by a reverse polarity base current, and after a certain period of delay, an arc is generated by a reverse polarity pulse current, and after that, the reverse polarity base current is passed again, and then the polarity is reversed to the positive polarity base current. It is something.
作用
本発明の変流パルスアークでは、正極性アークから逆極
性アークに極性が反転する際に、第３図ａに示すように
、いったんピーク値が臨界電流以下である逆極性ベース
電流によるアークを発生させ、その後ピーク電流が臨界
電流以上である逆極性パルス電流によるアークを発生さ
せるので、−度に変化する電流の１を少なくすることが
でき、第４図すの電圧波形に示している再点弧電圧と電
流の積によるエネルギーを小さく押えることができるの
で溶接音を小さくする事が出来る。Operation In the variable current pulse arc of the present invention, when the polarity is reversed from a positive polarity arc to a reverse polarity arc, as shown in Figure 3a, the arc is caused by a reverse polarity base current whose peak value is below the critical current. Then, an arc is generated by a reverse polarity pulse current whose peak current is higher than the critical current, so it is possible to reduce the current that changes every -degree, and the voltage waveform shown in Figure 4 can be reduced. Since the energy resulting from the product of ignition voltage and current can be kept small, welding noise can be reduced.
実施例 以下本発明の一実施例について詳細に説明する。Example An embodiment of the present invention will be described in detail below.
第１図に本発明の変流パルスアークを発生するだめのブ
ロック構成図を示す。１は直流電源であり、２はその直
流をスイッチング素子により交流に変換するインバータ
である。ここでは逆極性期間にＯＮしているスイッチン
グ素子Ｓ４とチョッピングを行なうスイッチング素子Ｓ
１．そして正極性期間にＯＮしているスイッチング素子
Ｓ３とチョッピングを行なうスイッチング素子８２、そ
してフリホイール用ダイオードＤＩ、Ｄ２．Ｄ３゜Ｄ４
によって構成されているフルブリッジ構成のインバータ
を例にめげる。３は出力電流の平滑用リアクトル、４は
電極、６はアーク、６は母材でるる。１０はシーケンス
発生器を示し、ここでは第２図乙に示す逆極性信号、ｂ
に示す正極性信号、Ｃに示すパルス電流信号を発生して
いる。乙の逆極性信号のＨＩ（ｒＨ倍信号あるＴ１−Ｔ
４期間はスイッチング素子Ｓ１がテロラビングを行ない
、スイッチング素子Ｓ４がＯＮしている期間であるＯｂ
の正極性信号のＨＩＧＨ信号であるＴｒｓ−Ｔｅ期間は
スイッチング素子Ｓ２がチョッピングを行ない、スイッ
チング素子Ｓ３がＯＮしている期間である。また乙の逆
極性信号とｂの正極性信号の両方ともＬ ＯＷテロるＴ
ｏ−ＴＩ期間、Ｔ６−Ｔ７期間は正極性期間から逆極性
期間に反転するときのデッドタイム期間であり、Ｔ４−
Ｔｅ期間は逆極性期間から正極性期間に反転するときの
デッドタイム期間を示している。Ｃのパルス電流信号は
、Ｔ１−Ｔ４の逆極性期間内に乙の逆極性信号がＨＩＧ
Ｈになった後一定期間であるＴ１−７２期間をおいてパ
ルス電流を発生するＴ２−Ｔ３期間にＨＩＧＨになる信
号である。ｄの出力電流波形はシーケンス発生器によっ
て出力された信号に基いて発生する出力電流波形の概略
図を示している。FIG. 1 shows a block diagram of a device for generating a variable current pulse arc according to the present invention. 1 is a DC power supply, and 2 is an inverter that converts the DC into AC using a switching element. Here, the switching element S4 that is ON during the reverse polarity period and the switching element S that performs chopping
1. Then, the switching element S3 that is ON during the positive polarity period, the switching element 82 that performs chopping, and the freewheeling diodes DI, D2 . D3゜D4
Let us take as an example a full-bridge configuration inverter configured by . 3 is a reactor for smoothing the output current, 4 is an electrode, 6 is an arc, and 6 is a base material. Reference numeral 10 indicates a sequence generator, in which the reverse polarity signal shown in FIG.
A positive polarity signal shown in , and a pulse current signal shown in C are generated. HI of the reverse polarity signal of B (T1-T with rH times signal)
The fourth period is the period during which the switching element S1 performs terror rubbing and the switching element S4 is ON.
The Trs-Te period in which the positive polarity signal is HIGH is a period in which the switching element S2 performs chopping and the switching element S3 is turned on. Also, both the reverse polarity signal of O and the positive polarity signal of b are LOW terror T.
The o-TI period and the T6-T7 period are dead time periods when the positive polarity period is reversed to the reverse polarity period, and the T4-T7 period is the dead time period when the positive polarity period is reversed to the reverse polarity period.
The Te period indicates a dead time period when the reverse polarity period is reversed to the positive polarity period. The pulse current signal of C is such that the reverse polarity signal of B is HIGH within the reverse polarity period of T1-T4.
This is a signal that becomes HIGH during the T2-T3 period in which a pulse current is generated after a fixed period of T1-72 after the signal becomes H. d shows a schematic diagram of the output current waveform generated based on the signal output by the sequence generator.
１１は１０のシーケンス発生器でつくられたシーケンス
信号の流れを示しており、１２０基準電圧発生器と１５
のスイッチング信号発生器におくられる。１２の基準電
圧発生器では、第２図ｅの基準電圧信号に示すように逆
極性時ベース電流期間にＴ２の電圧値、パルス電流期間
にｖｌの電圧値、そして正極性時にＴ３の電圧値という
ようにそれぞれの出力電流値に比例した基準電圧を発生
し、１３によりその基準電圧は９の比較器におくられる
。９の比較器では７の電流検出器により検出された８の
インバータの出力電流の検出信号と１３の基準電圧とを
比較し、第２図ｆに示すような比較信号を発生している
。１６のスイッチング信号発生器では１４の比較信号と
１１のシーケンス信号により、２のインバータの出力電
流全第２図ｄに示すような出力電流波形にするためのス
イッチング素子のドライブ信号を発生している。第２図
ｇに逆極性ドライブ信号、ｈに正極性ドライブ信号を示
している。１６はそのドライブ信号の流れを示す。11 shows the flow of sequence signals generated by 10 sequence generators, 120 reference voltage generators and 15
is sent to the switching signal generator. In the reference voltage generator No. 12, as shown in the reference voltage signal in Fig. 2e, the voltage value of T2 is generated during the base current period during reverse polarity, the voltage value of vl during the pulse current period, and the voltage value of T3 during positive polarity. A reference voltage proportional to each output current value is generated as shown in FIG. The comparator 9 compares the detection signal of the output current of the inverter 8 detected by the current detector 7 with the reference voltage 13, and generates a comparison signal as shown in FIG. 2f. The switching signal generator No. 16 uses the comparison signal No. 14 and the sequence signal No. 11 to generate a drive signal for the switching elements to make the total output current of the No. 2 inverters have an output current waveform as shown in Fig. 2d. . FIG. 2g shows a reverse polarity drive signal, and h shows a positive polarity drive signal. 16 shows the flow of the drive signal.
発明の効果
以上述べてきたように、正極性アークから逆極性アーク
に極性が反転した後逆極性ベース電流によるアークを発
生させ一定期間遅らせて逆極性パルス電流によるアーク
を発生させることにより溶接音を小さくすることができ
る。その結果、作業環境の大幅な改善が可能となり、溶
接作業性が大幅に向上する。Effects of the Invention As described above, welding noise can be reduced by generating an arc by a reverse polarity base current after the polarity is reversed from a positive polarity arc to a reverse polarity arc, and then generating an arc by a reverse polarity pulse current after a certain period of delay. Can be made smaller. As a result, the working environment can be significantly improved, and welding workability can be greatly improved.
第１図は本発明の一実施例による交流アーク全発生する
ためのブロック図、第２図は同実施例による出力電流と
各信号の波形図、第３図は従来の交流パルスの出力電流
と出力電圧の波形図、第４図は本実施例による又流パル
スの出力電流と出力電圧の波形図である。
１・・・・・・直流電源、２・・・・・・インバータ、
９・・・・・・比較器、１０・・・・・・シーケンス発
生器、１２・・・・・・基準電圧発生器、１５・・・・
・・スイッチング信号発生器。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第２
０
正極性電流
第４図
逆ｇＥ性パルス電流Fig. 1 is a block diagram for fully generating an AC arc according to an embodiment of the present invention, Fig. 2 is a waveform diagram of the output current and each signal according to the same embodiment, and Fig. 3 is a diagram showing the output current of a conventional AC pulse and the waveform diagram of each signal. FIG. 4 is a waveform diagram of the output current and output voltage of the recurrent pulse according to this embodiment. 1...DC power supply, 2...Inverter,
9... Comparator, 10... Sequence generator, 12... Reference voltage generator, 15...
...Switching signal generator. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
0 Positive polarity current Figure 4 Reverse gE pulse current
Claims (1)
を溶融させる臨界電流以上のパルス電流とアークを維持
するベース電流からなる逆極性アークと、電流が母材か
ら電極の方向へ流れアークを維持するベース電流からな
る正極性アークの、両極性アークからなる交流アーク溶
接電源において、前記正極性アークから前記逆極性アー
クに極性が反転した後、逆極性ベース電流によるアーク
を発生させ一定期間遅らせて逆極性パルス電流によるア
ークを発生させ、その後再度逆極性ベース電流を通電し
た後に正極性ベース電流に極性反転を行なうことを特徴
とする交流アーク溶接電源。A reverse polarity arc consists of a pulse current in which the current flows from the electrode to the base metal and the peak current value exceeds the critical current that melts the wire, and a base current that maintains the arc, and a reverse polarity arc in which the current flows from the base metal to the electrode to form the arc. In an AC arc welding power source consisting of a bipolar arc of a positive polarity arc consisting of a base current to be maintained, after the polarity is reversed from the positive polarity arc to the reverse polarity arc, an arc is generated by the reverse polarity base current and delayed for a certain period of time. An alternating current arc welding power source characterized in that an arc is generated by a reverse polarity pulse current, and then a reverse polarity base current is passed through again, and then the polarity is reversed to a positive base current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30900987A JPH0661623B2 (en) | 1987-12-07 | 1987-12-07 | AC arc welding power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30900987A JPH0661623B2 (en) | 1987-12-07 | 1987-12-07 | AC arc welding power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01150469A true JPH01150469A (en) | 1989-06-13 |
| JPH0661623B2 JPH0661623B2 (en) | 1994-08-17 |
Family
ID=17987795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30900987A Expired - Lifetime JPH0661623B2 (en) | 1987-12-07 | 1987-12-07 | AC arc welding power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0661623B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5138132A (en) * | 1990-02-28 | 1992-08-11 | Rehm Schweisstechnik Gmbh U. Co. | Method for noise reduction |
| EP1193019A2 (en) * | 2000-09-12 | 2002-04-03 | Daihen Corporation | Method and apparatus for controlling AC pulse ARC welding and welding power source apparatus |
| US6600135B2 (en) | 2000-09-12 | 2003-07-29 | Daihen Corporation | Method and apparatus for controlling AC pulse arc welding and welding power source apparatus |
| JP2010284708A (en) * | 2009-06-15 | 2010-12-24 | Daihen Corp | Method for controlling alternating current pulse arc welding |
| CN104053521A (en) * | 2011-11-09 | 2014-09-17 | 林肯环球股份有限公司 | Apparatus and method for pulse welding with AC waveform |
-
1987
- 1987-12-07 JP JP30900987A patent/JPH0661623B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5138132A (en) * | 1990-02-28 | 1992-08-11 | Rehm Schweisstechnik Gmbh U. Co. | Method for noise reduction |
| EP1193019A2 (en) * | 2000-09-12 | 2002-04-03 | Daihen Corporation | Method and apparatus for controlling AC pulse ARC welding and welding power source apparatus |
| US6600135B2 (en) | 2000-09-12 | 2003-07-29 | Daihen Corporation | Method and apparatus for controlling AC pulse arc welding and welding power source apparatus |
| JP2010284708A (en) * | 2009-06-15 | 2010-12-24 | Daihen Corp | Method for controlling alternating current pulse arc welding |
| US9162308B2 (en) | 2010-10-22 | 2015-10-20 | Lincoln Global, Inc. | Apparatus and method for pulse welding with AC waveform |
| CN104053521A (en) * | 2011-11-09 | 2014-09-17 | 林肯环球股份有限公司 | Apparatus and method for pulse welding with AC waveform |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0661623B2 (en) | 1994-08-17 |
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