JPH01162573A - Arc welding power source - Google Patents
Arc welding power sourceInfo
- Publication number
- JPH01162573A JPH01162573A JP31905587A JP31905587A JPH01162573A JP H01162573 A JPH01162573 A JP H01162573A JP 31905587 A JP31905587 A JP 31905587A JP 31905587 A JP31905587 A JP 31905587A JP H01162573 A JPH01162573 A JP H01162573A
- Authority
- JP
- Japan
- Prior art keywords
- output
- current
- output current
- circuit
- current value
- 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 38
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 230000003321 amplification Effects 0.000 claims description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 11
- 239000010953 base metal Substances 0.000 claims description 4
- 230000007423 decrease Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000035515 penetration 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、消耗性電極を用いた薄板の高速溶接などに好
適な出力波形を有するアーク溶接電源に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an arc welding power source having an output waveform suitable for high-speed welding of thin plates using a consumable electrode.
［従来の技術］
消耗性電極を用いる短絡アーク溶接において、溶接電源
出力電流のピーク値を低くし、かつベース値を高くすれ
ば、スパッタの発生が少なく、ビード外観も良くなるが
、このようにすると、第２図に示すように、アーク長が
急激に短くなったとき、電流のピーク値が低いため、短
絡が開放されないで長い短絡が生じ、その間に加熱され
た溶接ワイヤが爆発的に溶断してアーク切れを生じるこ
とがあり、特に薄板を高速で溶接する場合に障害となっ
ていた。従来、その対策として、第３図に示すように、
短絡時間Ｔが所定時間以上になると、これを検知して出
力電流を急激に立上ら・せる方式が提案されている。[Prior art] In short-circuit arc welding using a consumable electrode, if the peak value of the output current of the welding power source is lowered and the base value is increased, spatter will be less generated and the bead appearance will be improved. Then, as shown in Figure 2, when the arc length suddenly shortens, the short circuit is not released because the peak value of the current is low, and a long short circuit occurs, during which the heated welding wire explodes and melts. This can cause arc breakage, which is a particular problem when welding thin plates at high speeds. Conventionally, as a countermeasure, as shown in Figure 3,
A method has been proposed in which when the short circuit time T exceeds a predetermined time, this is detected and the output current is suddenly raised.
［発明が解決しようとする問題点］ 上記従来方式には次に述べるような問題点がある。[Problem to be solved by the invention] The conventional method described above has the following problems.
（１）出力電流を急激に立上らせるためには、制御周期
の短い高周波インバータによる出力制御が必要であり、
後述するようにインバータ制御のアーク溶接電源では、
短絡状態とアーク状態の判別がむずかしい。(1) In order to rapidly increase the output current, it is necessary to control the output using a high-frequency inverter with a short control cycle.
As described later, in an inverter-controlled arc welding power source,
It is difficult to distinguish between a short circuit condition and an arc condition.
（２）大電流を流して短絡を開放するのは良いが。(2) It is good to open a short circuit by flowing a large current.
次の短絡を促進する配慮がなされていないため。No consideration was given to promoting the next short circuit.
短絡開放後のアーク期間が長くなり、アークが安定する
までに時間がかかる。すなわち、溶接ワイヤの母材への
突込みにより短絡・アークの周期に影響を受け、アーク
の乱れが生じやすい。The arc period after the short circuit is opened is longer, and it takes longer for the arc to stabilize. That is, the penetration of the welding wire into the base metal is affected by the short circuit/arc cycle, which tends to cause arc disturbances.
本発明の目的は、短絡・アークの判別をすることなしに
溶接ワイヤの突込みによるアーク切れを防止し、かつア
ークの乱れも回避することができるアーク溶接電源を提
供することにある。An object of the present invention is to provide an arc welding power source that can prevent arc breakage due to welding wire protrusion without distinguishing between short circuit and arc, and can also avoid arc disturbance.
［問題点を解決するための手段］
上記目的は、溶接電源出力電流の変化率を検出する手段
と、上記電流変化率の検出信号を増幅して出力制御部の
制御入力に負帰還することにより出力電流の変化率を制
御する電流変化率制御回路と、溶接電源出力電流値を検
出する手段と、検出された出力電流値が所定値以上であ
るか否かを判定する電流値判定回路と、この電流値判定
回路の判定出力より出力電流値が所定値以上にある時間
が所定時間以上経過したことを検知する時限回路とを備
え、上記電流値判定回路の判定出力と上記時限回路の出
力により上記電流変化率制御回路の増幅度を変え、出力
電流値が所定値以上にある時間が所定時間経過するまで
は出力電流の変化率を通常より小さくし、出力電流値が
所定値以上にある時間が所定時間以上経過したときは出
力電流の変化率を通常より大きくすることにより、達成
される。[Means for solving the problem] The above object is achieved by providing a means for detecting the rate of change of the output current of the welding power source, and amplifying the detection signal of the current rate of change and feeding it negative feedback to the control input of the output control section. a current change rate control circuit that controls the rate of change of the output current; a means for detecting a welding power source output current value; a current value determination circuit that determines whether the detected output current value is equal to or greater than a predetermined value; A time limit circuit is provided which detects, based on the judgment output of the current value judgment circuit, that the time period during which the output current value is equal to or higher than a predetermined value has passed for a predetermined time or more; The amplification degree of the current change rate control circuit is changed, and the rate of change of the output current is made smaller than normal until the time when the output current value is above a predetermined value has elapsed, and the time when the output current value is above the predetermined value. This is achieved by making the rate of change of the output current larger than usual when a predetermined time has elapsed.
［作用］
第４図に本発明による出力電流波形の一例を示す。本発
明では、長い短絡が生じた場合、出力電流値も大きくな
ることから、検出された出力電流値が所定値以上である
か否かを判定し、出力電流値が所定値（図中ａ）以上で
あれば、その持続時間が所定時間（図中Ｔ）経過するま
では、電流変化率制御回路の帰還信号に対する増幅度を
大きくすることにより、出力電流の変化率を通常より小
さくするような制御を行ない、第４図の電流波形イーロ
ーハーニーホのように出力電流のピーク値を極力低く抑
えてスパッタの発生を少なくする。[Operation] FIG. 4 shows an example of the output current waveform according to the present invention. In the present invention, since the output current value also increases when a long short circuit occurs, it is determined whether the detected output current value is greater than or equal to a predetermined value, and the output current value is determined to be a predetermined value (a in the figure). If the duration is above, the rate of change of the output current is made smaller than usual by increasing the amplification degree for the feedback signal of the current rate of change control circuit until the predetermined time (T in the figure) has elapsed. The output current is controlled to suppress the peak value of the output current as low as possible, as shown in the current waveform E-L-H-N-H in FIG. 4, thereby reducing the occurrence of spatter.
そして、出力電流値が所定値（図中ａ）以上にある時間
が所定時間（図中Ｔ）以上経過すると、それを検知して
電流変化率制御回路の帰還信号に対する増幅度を小さく
することにより、出力電流の変化率を通常より大きくす
るような制御を行ない、第４図の電流波形ホーヘートー
チーリーヌのように出力電流値を急激に上昇させて短絡
を開放し、短絡開放後も出力電流値を前記所定値以下に
なるまで急激に低下させる。これにより、短絡番早く開
放して溶接ワイヤの加熱・溶断によるアーク切れを防止
するだけでなく、アーク状態になってから次の短絡への
移行を促進して、アークの乱れを回避することが可能と
なる。また、本方式は、長い短絡が生じたことを出力電
流値で判定しているため、短絡・アークの判別を必要と
しない。When the output current value exceeds a predetermined value (a in the figure) for a predetermined time (T in the figure), this is detected and the amplification degree for the feedback signal of the current change rate control circuit is reduced. , the rate of change of the output current is controlled to be larger than normal, and the output current value is suddenly increased to open the short circuit, as shown in the current waveform in Figure 4, and the output current is maintained even after the short circuit is opened. The value is rapidly lowered to below the predetermined value. This not only opens the short circuit quickly to prevent arc breakage due to heating and fusing of the welding wire, but also promotes the transition to the next short circuit after an arc has been established, thereby avoiding arc disturbances. It becomes possible. Furthermore, since this method determines whether a long short circuit has occurred based on the output current value, there is no need to distinguish between short circuits and arcs.
［実施例］
第１図に本発明の一実施例を示す。図中、１は交流入力
端子、２は商用周波数の交流入力を直流に変換する入力
側整流回路、３は平滑用コンデンサ、４は平滑された直
流入力を商用周波数より高い周波数（例えば２０ｋｌｌ
ｚ）の交流に変換するインバータ回路で１本溶接電源の
出力制御部に相当する。インバータ回路４の交流出力は
変圧器５で溶接に適した電圧に降圧された後、出力側整
流回路６で直流に変換され、直流リアクタ７、電流検出
用シャント抵抗８を通って、出力端子９よりトーチ１０
と母材１１の間のアーク負荷１２に供給される。[Example] FIG. 1 shows an example of the present invention. In the figure, 1 is an AC input terminal, 2 is an input side rectifier circuit that converts AC input at a commercial frequency into DC, 3 is a smoothing capacitor, and 4 is a smoothed DC input at a frequency higher than the commercial frequency (for example, 20KLL).
z) is an inverter circuit that converts to alternating current, and corresponds to the output control section of a single welding power source. The AC output of the inverter circuit 4 is stepped down to a voltage suitable for welding by a transformer 5, then converted to DC by an output side rectifier circuit 6, passed through a DC reactor 7, a shunt resistor 8 for current detection, and an output terminal 9. More torch 10
and the base metal 11.
１３は消耗性電極である溶接ワイヤ、１４はワイヤ送給
モータである。13 is a welding wire which is a consumable electrode, and 14 is a wire feeding motor.
電流変化率検出手段として直流リアクタ７に設けられた
二次巻線７ａは、溶接電源出力電流の変化率（ｄｉ／ｄ
ｔ）に比例した電圧を発生する。この電圧を電流変化率
制御回路１７により増幅して帰還信号とし、これと出力
電圧設定器１５からの基準入力信号とを加算器１６で加
算した信号を、前記インバータ回路４の出力パルス幅を
決定する制御入力とすることにより、溶接電源の外部出
力特性が定電圧特性となり、かつ第４図に示すような出
力電流波形が得られるように溶接電源の出力制御を行な
う。A secondary winding 7a provided in the DC reactor 7 as current change rate detection means detects the change rate (di/d
t). This voltage is amplified by the current change rate control circuit 17 to become a feedback signal, and the signal obtained by adding this and the reference input signal from the output voltage setting device 15 by an adder 16 determines the output pulse width of the inverter circuit 4. By using the control input as shown in FIG. 4, the output of the welding power source is controlled so that the external output characteristic of the welding power source becomes a constant voltage characteristic and an output current waveform as shown in FIG. 4 is obtained.
電流変化率制御回路１７は、例えば演算増幅器の帰還回
路に挿入する抵抗を選択スイッチにより変化させること
で増幅度を可変としたもので、その増幅度を変えること
により、出力電流波形における電流変化率を大、中、小
３段階に制御する。The current change rate control circuit 17 has a variable amplification degree by changing the resistance inserted into the feedback circuit of the operational amplifier using a selection switch, for example. By changing the amplification degree, the current change rate in the output current waveform can be adjusted. is controlled in three levels: large, medium, and small.
電流値判定回路１８は、電流検出用シャント抵抗８に発
生する出力電流値に比例した電圧を増幅器１９で増幅し
た信号と、電流レベル設定器２０からの基準信号とをコ
ンパレータ２１で比較し、出力電流値が所定値以上であ
るか否かを判定する回路であり、オンデレータイマ２２
は、電流値判定回路１８の判定出力より出力電流値が所
定値以上にある時間が所定時間以上経過したことを検知
する時限回路である。また、２３は電流値判定回路１８
内のコンパレータ２１の出力信号と、オンデレータイマ
２２の出力信号を反転した信号を入力とする禁止ゲート
であり、この禁止ゲート２３の出力信号とオンデレータ
イマ２２の出力信号を、電流変化率制御回路１７の増幅
度を変える選択スイッチ等の制御信号としている。The current value determination circuit 18 compares a signal obtained by amplifying a voltage proportional to the output current value generated in the current detection shunt resistor 8 with an amplifier 19 and a reference signal from a current level setting device 20 using a comparator 21, and outputs the result. This is a circuit that determines whether the current value is greater than or equal to a predetermined value, and the on-delay timer 22
is a time limit circuit that detects, based on the determination output of the current value determination circuit 18, that the time period during which the output current value is equal to or greater than a predetermined value has elapsed for a predetermined time or more. Further, 23 is a current value determination circuit 18
This is a prohibition gate which inputs the output signal of the comparator 21 and the inverted signal of the on-delay timer 22, and the output signal of the prohibition gate 23 and the output signal of the on-delay timer 22 are controlled by current change rate control. It is used as a control signal for a selection switch or the like that changes the amplification degree of the circuit 17.
上記構成において、第４図に示すように、急激なアーク
長の変化などにより溶接ワイヤ１３が母材１１に突込み
、長い短絡が生じた場合、出力電流値が電流レベル設定
器２０からの基準信号に相当する所定の電流値（図中ａ
）以上になると、電流値判定回路１８内のコンパレータ
２１の出力がハイレベルになる。出力電流値が所定電流
値以上にある時間が所定時間（図中Ｔ）経過するまでは
、このコンパレータ２１のハイレベル出力が禁止ゲート
２３を通して電流変化率制御回路１７に入力され、この
信号によって電流変化率制御回路１７の増幅度が増大す
るため、溶接電源の出力電流値の上昇の変化率は。In the above configuration, as shown in FIG. 4, if the welding wire 13 plunges into the base metal 11 due to a sudden change in the arc length or the like and a long short circuit occurs, the output current value changes from the reference signal from the current level setting device 20. A predetermined current value corresponding to (a in the figure)
), the output of the comparator 21 in the current value determination circuit 18 becomes high level. The high level output of the comparator 21 is input to the current change rate control circuit 17 through the inhibition gate 23 until the time period during which the output current value is greater than or equal to the predetermined current value has elapsed, and the current is controlled by this signal. Since the amplification degree of the rate of change control circuit 17 increases, the rate of change of the increase in the output current value of the welding power source is as follows.
第４図の口→ハ、へ→トのように通常より小さくなる。The mouth becomes smaller than usual, as in Figure 4, mouth→ha, hee→to.
この出力電流値が所定値（図中ａ）以上にある時間が所
定時間（図中Ｔ）経過すると、前記コンパレータ２１の
ハイレベル出力によってオンデレータイマ２２が動作し
、タイマ２２出力がハイレベルとなるため、禁止ゲート
２３の出力は止められ、電流変化率制御回路１７にはタ
イマ２２のハイレベル出力だけが入力される。この信号
により、電流変化率側−御回路１７の増幅度が低下し、
出力電流値の変化率を通常より大きくするため、第４図
のトーチのように出力電流値が急激に上昇し、短絡を開
放する。そして、短絡開放後も出、１電流値が所定値（
図中ａ）以上の区間は、電流変化率制御回路１７の増幅
度が低下したままであるため、出力電流値はチ→りのよ
うに急激に低下する。ａ点より低い電流領域では、コン
パレータ２１およびタイマ２２′の出力がローレベルと
なることで、電流変化率制御回路１７が通常の増幅度に
もどるため、第４図のり→ヌに示すような比較的縁やか
な通常の電流変化となる。When a predetermined time (T in the figure) has elapsed during which this output current value is greater than a predetermined value (a in the figure), the on-delay timer 22 is activated by the high level output of the comparator 21, and the output of the timer 22 becomes high level. Therefore, the output of the inhibit gate 23 is stopped, and only the high level output of the timer 22 is input to the current change rate control circuit 17. This signal lowers the amplification degree of the current change rate side control circuit 17,
In order to make the rate of change of the output current value larger than usual, the output current value rises rapidly like the torch in FIG. 4, and the short circuit is opened. Then, even after the short circuit is opened, the current value is set to a predetermined value (
In the section a) and above in the figure, the amplification degree of the current change rate control circuit 17 remains low, so the output current value rapidly decreases as if from chi to chi. In the current region lower than point a, the outputs of the comparator 21 and timer 22' become low level, and the current change rate control circuit 17 returns to the normal amplification degree, so the comparison shown in FIG. This results in normal current changes that are accurate to the point.
この短絡開放直後における急激な電流値の低下により、
従来例の第３図に見られるように長いアーク期間が生じ
て、アークが乱れること力く、短絡・アークの周期には
ほとんど影響を与えずに安定したアークに移行させるこ
とができる。Due to the sudden drop in current value immediately after this short circuit is opened,
As shown in FIG. 3 of the conventional example, a long arc period occurs and the arc is not disturbed, and the arc can be shifted to a stable arc with almost no effect on the short-circuit/arc cycle.
以上のように本実施例によれば、短絡・アークの判別を
必要とせずに、溶接ワイヤの溶断によるアーク切れを防
止し、かつアークの乱れを回避することが可能とな、る
。また、出力電流値が所定値以上にある時間が所定時間
経過するまでは電流変化率を通常より小さくし、所定時
間経過後のみ電流変化率を通常より大きくするようにし
ているので、出力電流のピーク値を極力低く抑え、スバ
ッタの発生を少なくすることができる。As described above, according to the present embodiment, it is possible to prevent arc breakage due to melting of the welding wire and to avoid arc disturbance without the need to distinguish between short circuits and arcs. In addition, the current change rate is made smaller than normal until the output current value exceeds a predetermined value for a predetermined time, and the current change rate is made larger than normal only after the predetermined time has elapsed. It is possible to suppress the peak value as low as possible and reduce the occurrence of spatter.
特に、インバータ制御によるアーク溶接電源においては
、電源を小形軽量化する必要から出力側の直流リアクタ
７のインダクタンス値を小さくしているため、溶接ケー
ブルのインピーダンスによる電圧分担の割合が大きくな
り、その結果、短絡時とアーク時の出力端子電圧の差が
小さく、ケーブル長によっても変動し、短絡・アークの
判別が非常にむずかしいので、本発明の効果は大である
。In particular, in an arc welding power source controlled by an inverter, the inductance value of the DC reactor 7 on the output side is made small due to the need to make the power source smaller and lighter, so the proportion of voltage sharing by the impedance of the welding cable increases, resulting in The difference in the output terminal voltage during a short circuit and an arc is small and varies depending on the cable length, making it very difficult to distinguish between a short circuit and an arc, so the effects of the present invention are significant.
また、上記実施例では、出力電流値の上昇時、低下時共
に、同一電流値でコンパレータ２１の出力が反転するも
のとして説明したが、コンパレータ２１にヒステリシス
特性を持たせて、第５図に示すように、短絡開放後の電
流低下時にはａ−ｂの値まで出力電流値を急降下させる
ようにすれば、アーク期間をさらに短くし、アークの乱
れを少なくすることができる。Furthermore, in the above embodiment, the output of the comparator 21 was explained as being inverted at the same current value both when the output current value increases and when it decreases, but the comparator 21 is provided with hysteresis characteristics as shown in FIG. If the output current value is suddenly reduced to the value a-b when the current decreases after the short circuit is opened, the arc period can be further shortened and arc disturbances can be reduced.
出力電流の変化率を検出する手段としては、第１図に示
す直流リアクタ二次巻線７ａを設ける代りに、シャント
抵抗８による電流検出信号の微分値をとってもよい。As a means for detecting the rate of change of the output current, instead of providing the DC reactor secondary winding 7a shown in FIG. 1, the differential value of the current detection signal by the shunt resistor 8 may be taken.
［発明の効果］
本発明によれば、短絡・アークの判別をすることなしに
、溶接ワイヤの突込みにより長い短絡が生じたとき、短
絡を早く開放してアーク切れを防止し、かつアークが発
生してから次の短絡への移行を促進してアークの乱れを
回避することができ、しかも、出力電流のピーク値を極
力低く抑えてスパッタの発生を少なくしているので、消
耗性電極を用いて薄板の高速溶接などを行なう場合に特
に有効である。[Effects of the Invention] According to the present invention, when a long short circuit occurs due to the welding wire thrusting, the short circuit can be quickly opened to prevent arc breakage, and arc breakage can be prevented without distinguishing between a short circuit and an arc. It is possible to avoid arc disturbances by promoting the transition from one short circuit to the next, and to keep the peak value of the output current as low as possible to reduce the occurrence of spatter. This is particularly effective when performing high-speed welding of thin plates.
第１図は本発明の一実施例を示す回路構成図、第２図は
溶接ワイヤの突込みによりアーク切れを生じた例を示す
出力電流波形図、第３図は従来技術によりアーク切れは
防止できるが、アークの乱れを生じた例を示す出力電流
波形図、第４図は本発明の一実施例によりアーク切れ、
アークの乱れ共に防止できることを示す出力電流波形図
、第５図は電流値判定回路にヒステリシス特性を持たせ
た本発明の他の実施例の出力電流波形図である。
４・・・出力制御部（インバータ）、７ａ・・・電流変
化率検出手段（直流リアクタニ次巻線）、８・・・出力
電流値検出手段（シャント抵抗）、１１・・・母材、１
２・・・アーク負荷、１３・・・消耗性電極（溶接ワイ
ヤ）、１５・・・出力電圧設定部、１６・・・加算器、
１７・・・電流変化率制御回路、１８・・・電流値判定
回路、１９・・・増幅器、２０・・・電流レベル設定器
、２１・・・コンパレータ、２２・・・時限回路（オン
デレータイマ）、２３・・・禁止ゲート。
特許出願人 日立精工株式会社Figure 1 is a circuit configuration diagram showing an embodiment of the present invention, Figure 2 is an output current waveform diagram showing an example of arc breakage caused by the welding wire thrust, and Figure 3 is a diagram showing arc breakage that can be prevented by conventional technology. However, an output current waveform diagram showing an example in which the arc is disturbed is shown in FIG. 4.
FIG. 5 is an output current waveform diagram showing that both arc disturbances can be prevented. FIG. 5 is an output current waveform diagram of another embodiment of the present invention in which the current value determination circuit is provided with hysteresis characteristics. 4... Output control unit (inverter), 7a... Current change rate detection means (DC reactor secondary winding), 8... Output current value detection means (shunt resistor), 11... Base material, 1
2... Arc load, 13... Consumable electrode (welding wire), 15... Output voltage setting section, 16... Adder,
17... Current change rate control circuit, 18... Current value judgment circuit, 19... Amplifier, 20... Current level setter, 21... Comparator, 22... Time limit circuit (on-delay timer) ), 23... Forbidden gate. Patent applicant Hitachi Seiko Co., Ltd.
Claims (1)
圧特性のアーク溶接電源において、溶接電源出力電流の
変化率を検出する手段と、上記電流変化率の検出信号を
増幅して出力制御部の制御入力に負帰還することにより
出力電流の変化率を制御する電流変化率制御回路と、溶
接電源出力電流値を検出する手段と、検出された出力電
流値が所定値以上であるか否かを判定する電流値判定回
路と、この電流値判定回路の判定出力より出力電流値が
所定値以上にある時間が所定時間以上経過したことを検
知する時限回路とを備え、上記電流値判定回路の判定出
力と上記時限回路の出力により上記電流変化率制御回路
の増幅度を変え、出力電流値が所定値以上にある時間が
所定時間経過するまでは出力電流の変化率を通常より小
さくし、出力電流値が所定値以上にある時間が所定時間
以上経過したときは出力電流の変化率を通常より大きく
するようにしたことを特徴とするアーク溶接電源。 ２、上記電流値判定回路がヒステリシス特性を有するこ
とを特徴とする特許請求の範囲第１項記載のアーク溶接
電源。 ３、上記出力制御部が高周波インバータであることを特
徴とする特許請求の範囲第１項または第２項記載のアー
ク溶接電源。[Scope of Claims] 1. In an arc welding power source with constant voltage characteristics that generates an arc between a consumable electrode and a base metal, means for detecting a rate of change in the output current of the welding power source, and detection of the rate of current change. A current change rate control circuit that controls the rate of change of the output current by amplifying the signal and providing negative feedback to the control input of the output control section; a means for detecting the output current value of the welding power source; A current value determination circuit that determines whether the current value is greater than or equal to a predetermined value; and a time limit circuit that detects, based on the determination output of the current value determination circuit, that the time period during which the output current value is greater than or equal to the predetermined value has elapsed for a predetermined time or more. The amplification degree of the current change rate control circuit is changed based on the determination output of the current value determination circuit and the output of the time limit circuit, and the output current is changed until a predetermined period of time has elapsed during which the output current value is equal to or higher than a predetermined value. The arc welding power source is characterized in that the rate of change in the output current is made smaller than usual, and the rate of change in the output current is made larger than usual when the time period during which the output current value is equal to or greater than a predetermined value passes for a predetermined time or more. 2. The arc welding power source according to claim 1, wherein the current value determination circuit has a hysteresis characteristic. 3. The arc welding power source according to claim 1 or 2, wherein the output control section is a high frequency inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31905587A JPH01162573A (en) | 1987-12-18 | 1987-12-18 | Arc welding power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31905587A JPH01162573A (en) | 1987-12-18 | 1987-12-18 | Arc welding power source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01162573A true JPH01162573A (en) | 1989-06-27 |
| JPH0471629B2 JPH0471629B2 (en) | 1992-11-16 |
Family
ID=18105999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31905587A Granted JPH01162573A (en) | 1987-12-18 | 1987-12-18 | Arc welding power source |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01162573A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4914248A (en) * | 1986-03-13 | 1990-04-03 | Asahi Kasei Kogyo Kabushiki Kaisha | Diene polymers, process for production, thereof, and rubber compositions containing same |
| JP2012040594A (en) * | 2010-08-20 | 2012-03-01 | Daihen Corp | Arc welding method and arc welding system |
| JP2013501620A (en) * | 2009-08-10 | 2013-01-17 | フロニウス・インテルナツィオナール・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | Method of cutting short circuit during short circuit arc welding and welding apparatus for short circuit arc welding |
| WO2013012356A1 (en) * | 2011-07-19 | 2013-01-24 | Anpilov Sergej Mikhajlovich | Method for controlling a stand-alone inverter with a transformer output for rectangular wave ac arc welding and device for the implementation thereof |
| CN103223542A (en) * | 2012-01-26 | 2013-07-31 | 株式会社大亨 | Protection control method of welding source |
| WO2016204052A1 (en) * | 2015-06-18 | 2016-12-22 | 株式会社三社電機製作所 | Arc welding device |
-
1987
- 1987-12-18 JP JP31905587A patent/JPH01162573A/en active Granted
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4914248A (en) * | 1986-03-13 | 1990-04-03 | Asahi Kasei Kogyo Kabushiki Kaisha | Diene polymers, process for production, thereof, and rubber compositions containing same |
| JP2013501620A (en) * | 2009-08-10 | 2013-01-17 | フロニウス・インテルナツィオナール・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | Method of cutting short circuit during short circuit arc welding and welding apparatus for short circuit arc welding |
| US9035218B2 (en) | 2009-08-10 | 2015-05-19 | Fronius International Gmbh | Method for short-arc welding and welding device for short-arc welding |
| CN102371415B (en) * | 2010-08-20 | 2015-05-20 | 株式会社大亨 | Arc Welding Method And Arc Welding System |
| JP2012040594A (en) * | 2010-08-20 | 2012-03-01 | Daihen Corp | Arc welding method and arc welding system |
| CN102371415A (en) * | 2010-08-20 | 2012-03-14 | 株式会社大亨 | Arc Welding Method And Arc Welding System |
| WO2013012356A1 (en) * | 2011-07-19 | 2013-01-24 | Anpilov Sergej Mikhajlovich | Method for controlling a stand-alone inverter with a transformer output for rectangular wave ac arc welding and device for the implementation thereof |
| RU2481929C2 (en) * | 2011-07-19 | 2013-05-20 | Сергей Михайлович Анпилов | Method of controlling arc welding by nonconsumable electrode in atmosphere of protective gases and device to this end |
| CN103223542A (en) * | 2012-01-26 | 2013-07-31 | 株式会社大亨 | Protection control method of welding source |
| CN103223542B (en) * | 2012-01-26 | 2016-01-27 | 株式会社大亨 | The protecting control method of the source of welding current |
| WO2016204052A1 (en) * | 2015-06-18 | 2016-12-22 | 株式会社三社電機製作所 | Arc welding device |
| JP6259955B2 (en) * | 2015-06-18 | 2018-01-10 | 株式会社三社電機製作所 | Arc welding equipment |
| US10086463B2 (en) | 2015-06-18 | 2018-10-02 | Sansha Electric Manufacturing Co., Ltd. | Arc welding apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0471629B2 (en) | 1992-11-16 |
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