JP3527579B2 - Arc processing equipment - Google Patents
Arc processing equipmentInfo
- Publication number
- JP3527579B2 JP3527579B2 JP32390395A JP32390395A JP3527579B2 JP 3527579 B2 JP3527579 B2 JP 3527579B2 JP 32390395 A JP32390395 A JP 32390395A JP 32390395 A JP32390395 A JP 32390395A JP 3527579 B2 JP3527579 B2 JP 3527579B2
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- arc
- auxiliary power
- output
- circuit
- 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 - Fee Related
Links
Landscapes
- Arc Welding Control (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、アーク溶接、切
断、加熱及び溶融等のアーク加工において、電極と被加
工物とを一度短絡させた後に引き離してアークをスター
トさせる方式のアーク加工装置の改良に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an arc machining apparatus of a type in which, in arc machining such as arc welding, cutting, heating and melting, an electrode and a workpiece are short-circuited once and then separated to start an arc. It is about.
【０００２】[0002]
【従来の技術】図４は、従来のアーク加工装置の例を示
す接続図である。同図において、１０は溶接電源、１乃
至３は１次入力線、４は電極、５は被加工物、６は電極
側ケーブル、７は被加工物側ケーブル、８はトーチスイ
ッチ、９は遠隔出力調整器である。溶接電源１０内で、
ＤＲ１は１次整流回路、Ｃ１は平滑コンデンサ、ＴＲ１
はインバータ回路、Ｔ１はインバータトランス、ＤＲ２
は２次整流回路、ＬＤ１は直流リアクトル、ＣＴ１は出
力電流検出器、ＤＲ３は補助電源整流回路、Ｃ２は平滑
コンデンサ、Ｓ１はスイッチ回路、Ｒ１は電流制限抵抗
器、ＣＴ２は補助電源電流検出器、ＳＣＲ１はサイリス
タ、ＤＴ１は電圧検出器、ＣＬ１は制御回路、ＴＭ１は
電極側出力端子、ＴＭ２は被加工物側出力端子である。2. Description of the Related Art FIG. 4 is a connection diagram showing an example of a conventional arc machining apparatus. In the figure, 10 is a welding power source, 1 to 3 are primary input lines, 4 are electrodes, 5 is a work piece, 6 is an electrode side cable, 7 is a work side cable, 8 is a torch switch, and 9 is remote. It is an output regulator. In the welding power source 10,
DR1 is a primary rectifier circuit, C1 is a smoothing capacitor, TR1
Is an inverter circuit, T1 is an inverter transformer, DR2
Is a secondary rectification circuit, LD1 is a DC reactor, CT1 is an output current detector, DR3 is an auxiliary power supply rectification circuit, C2 is a smoothing capacitor, S1 is a switch circuit, R1 is a current limiting resistor, CT2 is an auxiliary power supply current detector, SCR1 is a thyristor, DT1 is a voltage detector, CL1 is a control circuit, TM1 is an electrode side output terminal, and TM2 is a workpiece side output terminal.
【０００４】図４の装置において、１次整流回路ＤＲ
１、平滑コンデンサＣ１、インバータ回路ＴＲ１、イン
バータトランスＴ１、２次整流回路ＤＲ２、直流リアク
トルＬＤ１、出力電流検出器ＣＴ１及び制御回路ＣＬ１
は、アーク加工用の電力を供給する主電源を構成してい
る。補助電源整流回路ＤＲ３、平滑コンデンサＣ２、電
流制限抵抗器Ｒ１及び補助電源電流検出器ＣＴ２はアー
ク起動用の補助電源を構成している。また、スイッチ回
路Ｓ１は、補助電源を開閉する開閉手段であり、サイリ
スタＳＣＲ１は、主電源を開閉する開閉手段である。さ
らに、主電源の出力特性は出力電流検出器ＣＴ１、制御
回路ＣＬ１及びインバータ回路ＴＲ１によるフィードバ
ック制御により定電流制御された定電流特性となり、補
助電源の出力特性は電流制限抵抗器Ｒ１による垂下特性
となる。In the apparatus of FIG. 4, the primary rectifier circuit DR
1, smoothing capacitor C1, inverter circuit TR1, inverter transformer T1, secondary rectifier circuit DR2, DC reactor LD1, output current detector CT1 and control circuit CL1
Constitutes a main power supply for supplying electric power for arc machining. The auxiliary power supply rectifier circuit DR3, the smoothing capacitor C2, the current limiting resistor R1 and the auxiliary power supply current detector CT2 form an auxiliary power supply for starting an arc. The switch circuit S1 is an opening / closing means for opening / closing the auxiliary power supply, and the thyristor SCR1 is an opening / closing means for opening / closing the main power supply. Further, the output characteristic of the main power source is a constant current characteristic that is constant current controlled by the feedback control by the output current detector CT1, the control circuit CL1 and the inverter circuit TR1, and the output characteristic of the auxiliary power source is the drooping characteristic by the current limiting resistor R1. Become.
【０００６】図５は、図４に示した従来のアーク加工装
置の出力特性を示す線図である。図５に示すように、補
助電源の無負荷電圧Ｖst1 は、主電源の無負荷電圧Ｖst
2 よりも高く、主電源の短絡電流Ｉs2は、補助電源の短
絡電流Ｉs1よりも大きく設定されている。FIG. 5 is a diagram showing the output characteristics of the conventional arc machining apparatus shown in FIG. As shown in FIG. 5, the no-load voltage Vst1 of the auxiliary power source is equal to the no-load voltage Vst of the main power source.
2, the main power supply short-circuit current Is2 is set to be larger than the auxiliary power supply short-circuit current Is1.
【０００８】図４の装置において、トーチスイッチ８を
押すと起動信号が制御回路ＣＬ１に入力される。制御回
路ＣＬ１はこの起動信号を入力して、図示を省略したガ
ス供給回路を駆動する。ガス供給回路は開放された電極
４と被加工物５との間にシールドガスを放出する。シー
ルドガスが電極４に達する時間を見計らって制御回路Ｃ
Ｌ１は、サイリスタＳＣＲ１をＯＦＦの状態で、インバ
ータ回路ＴＲ１を起動しスイッチ回路Ｓ１をＯＮにす
る。これにより電極４と被加工物５との間には、サイリ
スタＳＣＲ１がＯＦＦの状態のため主電源の無負荷電圧
Ｖst2 は現れず、補助電源の無負荷電圧Ｖst1 が現れ
る。この状態で電極４と被加工物５とを短絡すると、図
５に示した短絡電流Ｉs1が流れる。In the apparatus of FIG. 4, when the torch switch 8 is pushed, a start signal is input to the control circuit CL1. The control circuit CL1 inputs this activation signal and drives a gas supply circuit (not shown). The gas supply circuit emits a shield gas between the opened electrode 4 and the workpiece 5. Control circuit C in consideration of the time when the shield gas reaches electrode 4
L1 activates the inverter circuit TR1 and turns on the switch circuit S1 while the thyristor SCR1 is off. As a result, between the electrode 4 and the workpiece 5, the no-load voltage Vst2 of the main power source does not appear and the no-load voltage Vst1 of the auxiliary power source appears because the thyristor SCR1 is in the OFF state. When the electrode 4 and the workpiece 5 are short-circuited in this state, the short-circuit current Is1 shown in FIG. 5 flows.
【００１０】つぎに電極４が被加工物５から引き離され
て小さなアークが発生すると、制御回路ＣＬ１は電圧検
出器ＤＴ１からの出力電圧の検出信号を入力してアーク
が発生したと判断し、サイリスタＳＣＲ１を導通し、引
き続いてスイッチ回路Ｓ１をＯＦＦする。この結果、電
極４と被加工物５との間に発生した小さなアークに主電
源から電力の供給が開始され、小さなアークは溶接アー
クに成長する。なお、電極４が被加工物５から引き離さ
れたときにアークが消滅したときは、制御回路ＣＬ１は
サイリスタＳＣＲ１を導通させることなく、主電源から
電力を供給しない。Next, when the electrode 4 is separated from the workpiece 5 and a small arc is generated, the control circuit CL1 inputs the detection signal of the output voltage from the voltage detector DT1 and determines that the arc is generated, and the thyristor is detected. The SCR1 is turned on, and then the switch circuit S1 is turned off. As a result, the main power source starts to supply electric power to the small arc generated between the electrode 4 and the workpiece 5, and the small arc grows into a welding arc. When the arc is extinguished when the electrode 4 is separated from the workpiece 5, the control circuit CL1 does not turn on the thyristor SCR1 and does not supply power from the main power source.
【００２０】[0020]
【発明が解決しようとする課題】図４に示した従来装置
において、電極４を被加工物５から引き離したときに発
生する小さなアークは小電流であるために不安定であ
り、主電源の無負荷電圧Ｖst2 が低い場合、アークが消
滅しやすい。しかし、無負荷電圧Ｖst2 を高くすると
（無負荷電圧）×（定格出力電流）で定まるアーク加工
装置の電力容量が大きくなり、不経済である。また、電
極４を被加工物５から引き離したときに小さなアークが
消滅しない場合でも補助電源の短絡電流Ｉs1が小さいと
きには安定した小さなアークを形成できず、スムーズに
溶接アークに移行できない場合がある。In the conventional apparatus shown in FIG. 4, the small arc generated when the electrode 4 is separated from the workpiece 5 is unstable because of a small current, and the main power supply is not provided. When the load voltage Vst2 is low, the arc easily extinguishes. However, increasing the no-load voltage Vst2 increases the power capacity of the arc machining apparatus, which is determined by (no-load voltage) × (rated output current), which is uneconomical. Further, even if the small arc does not disappear when the electrode 4 is separated from the workpiece 5, when the short-circuit current Is1 of the auxiliary power source is small, a stable small arc cannot be formed, and it may not be possible to smoothly shift to the welding arc.
【００２２】図６は、従来のア−ク加工装置の出力特性
を説明する線図である。小さなアークから溶接アークへ
の移行をスムーズにするためには、そのときの電流を大
きくすれば良いが、補助電源の無負荷電圧Ｖst1 を変化
させない場合は、電流制限抵抗器Ｒ１の値を小さくして
補助電源の短絡電流をＩs1よりも大きいＩs3にする必要
がある。しかし、電流制限抵抗器Ｒ１の値を小さくして
短絡電流を大きくすると垂下特性の傾斜がゆるやかにな
り、その結果小さなアークの安定性が低下する。その反
対に、垂下特性の傾斜を変えずに短絡電流を大きくする
には、同図に示すように、無負荷電圧をＶst3 のように
大きくする必要があり、その場合、補助電源の電力容量
が大きくなるという不具合がある。FIG. 6 is a diagram for explaining the output characteristics of the conventional arc processing apparatus. In order to make the transition from the small arc to the welding arc smooth, the current at that time may be increased. However, if the no-load voltage Vst1 of the auxiliary power supply is not changed, the value of the current limiting resistor R1 should be decreased. Therefore, it is necessary to set the short-circuit current of the auxiliary power supply to Is3 which is larger than Is1. However, if the value of the current limiting resistor R1 is decreased to increase the short-circuit current, the drooping characteristic becomes more gradual, and as a result, the stability of a small arc is reduced. On the other hand, in order to increase the short-circuit current without changing the slope of the drooping characteristic, it is necessary to increase the no-load voltage as Vst3 as shown in the figure. In that case, the power capacity of the auxiliary power supply is There is a problem that it becomes large.
【００３０】[0030]
【課題を解決するための手段】請求項１のアーク加工装
置は、アーク加工用の電力を供給する主電源とこの主電
源よりも高い無負荷電圧でかつ小電力容量の補助電源と
を並列に接続するとともに主電源及び補助電源に出力開
閉手段を設け、アーク起動時に補助電源の出力開閉手段
のみを閉路して電極４を被加工物５に短絡させた後に引
き離してアーク起動を行い、アークの発生を検出して主
電源の出力開閉手段を閉路するアーク加工装置におい
て、補助電源の出力回路に直流リアクトルＬＤ２を直列
に接続したアーク加工装置である。According to another aspect of the present invention, there is provided an arc machining apparatus in which a main power source for supplying electric power for arc machining and an auxiliary power source having a higher no-load voltage and a smaller power capacity than the main power source are connected in parallel. In addition to the connection, the main power supply and the auxiliary power supply are provided with output opening / closing means, and when the arc is started, only the output opening / closing means of the auxiliary power supply is closed to short-circuit the electrode 4 to the workpiece 5, and then the electrodes 4 are separated to start the arc. In the arc machining device which detects the occurrence and closes the output opening / closing means of the main power source, the arc machining device has a DC reactor LD2 connected in series to the output circuit of the auxiliary power source.
【００３２】請求項２のアーク加工装置は、アーク加工
用の電力を供給する主電源とこの主電源よりも高い無負
荷電圧でかつ小電力容量の補助電源とを並列に接続する
とともに主電源及び補助電源に出力開閉手段を設け、ア
ーク起動時に補助電源の出力開閉手段のみを閉路して電
極４を被加工物５に短絡させた後に引き離してアーク起
動を行い、アークの発生を検出して主電源の出力開閉手
段を閉路するアーク加工装置において、主電源の出力回
路に第１直流リアクトルＬＤ３（１／２）を直列に接続
し、この第１直流リアクトルＬＤ３（１／２）と補助電
源に直列に接続した第２直流リアクトルＬＤ３（２／
２）とが同一鉄心に巻かれた巻線を有しかつ各巻線がそ
れぞれに流れる電流によって共有する鉄心に同じ向きの
磁束を発生する極性に定められているアーク加工装置で
ある。According to another aspect of the arc machining apparatus of the present invention, a main power source for supplying electric power for arc machining and an auxiliary power source having a higher no-load voltage and a smaller power capacity than the main power source are connected in parallel, and the main power source and The auxiliary power supply is provided with an output opening / closing means, and when the arc is started, only the output opening / closing means of the auxiliary power supply is closed to short-circuit the electrode 4 to the workpiece 5 and then the electrodes 4 are separated to start the arc. In an arc machining apparatus that closes an output opening / closing means of a power supply, a first DC reactor LD3 (1/2) is connected in series to an output circuit of a main power supply, and the first DC reactor LD3 (1/2) is connected to the auxiliary power supply. The second DC reactor LD3 (2 /
2) is an arc machining apparatus having windings wound around the same iron core and having polarities that generate magnetic flux in the same direction in the iron core shared by the currents flowing through the respective windings.
【００３４】請求項３のアーク加工装置は、補助電源の
出力回路に直列に抵抗器Ｒ１を接続して垂下特性を得る
請求項１又は２のいずれかに記載のアーク加工装置であ
る。The arc machining device according to claim 3 is the arc machining device according to any one of claims 1 and 2, wherein the resistor R1 is connected in series to the output circuit of the auxiliary power source to obtain the drooping characteristic.
【００３６】請求項４のアーク加工装置は、補助電源の
出力特性を補助電源の出力電流を検出しフィードバック
制御によって定電流特性又は垂下特性に制御する請求項
１又は２のいずれかに記載のアーク加工装置である。The arc machining apparatus according to claim 4 is characterized in that the output characteristic of the auxiliary power source is detected by the output current of the auxiliary power source and is controlled by feedback control to have a constant current characteristic or a drooping characteristic. It is a processing device.
【００４０】[0040]
【発明の実施の形態】以下、本発明をその実施の形態を
示す図面に基づいて具体的に説明する。図１は本発明の
アーク加工装置の実施の形態を示す接続図である。同図
において、ＬＤ２は直流リアクトルである。また、補助
電源整流回路ＤＲ３の出力は、図４に示した従来のアー
ク加工装置と同様に、比較的低い無負荷電圧Ｖst1 に設
定しておく。その他は図４に示した従来装置と同機能の
部品またはアセンブリに同符号を付して説明を省略す
る。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below with reference to the drawings showing the embodiments thereof. FIG. 1 is a connection diagram showing an embodiment of an arc machining apparatus of the present invention. In the figure, LD2 is a DC reactor. Further, the output of the auxiliary power supply rectifier circuit DR3 is set to a relatively low no-load voltage Vst1 as in the conventional arc machining apparatus shown in FIG. With respect to others, parts or assemblies having the same functions as those of the conventional apparatus shown in FIG.
【００４８】図１の装置において、電極４を被加工物５
に接触させると補助電源の短絡電流が流れ始める。そし
て、電極４を被加工物５から引き離すと小さなアークが
発生するが電流が急減してアークが切れようした場合、
この電流の急減を防げる方向に直流リアクトルＬＤ２に
サージ電圧が発生するために、小さなアークがとぎれる
ことなく、スムーズに溶接アークに移行できる。なお、
制御回路ＣＬ１は電圧検出器ＤＴ１からの出力電圧の検
出信号を入力してアークが発生したことを判断し、サイ
リスタＳＣＲ１を導通させ、引き続いてスイッチ回路Ｓ
１をＯＦＦさせる。In the apparatus shown in FIG. 1, the electrode 4 is connected to the workpiece 5
The short-circuit current of the auxiliary power supply begins to flow when it is touched. When the electrode 4 is separated from the workpiece 5, a small arc is generated, but when the current suddenly decreases and the arc is about to break,
Since a surge voltage is generated in the DC reactor LD2 in the direction in which this sudden decrease in current can be prevented, a small arc is not interrupted and a smooth transition to a welding arc is possible. In addition,
The control circuit CL1 inputs the detection signal of the output voltage from the voltage detector DT1 and determines that an arc has occurred, and makes the thyristor SCR1 conductive, and subsequently the switch circuit S1.
Turn 1 OFF.
【００５０】図２は、本発明のアーク加工装置の別の実
施の形態を示す接続図である。同図において、ＬＤ３
（１／２）は第１直流リアクトルであり、ＬＤ３（２／
２）は第２直流リアクトルであり、これらの直流リアク
トルＬＤ３（１／２）及びＬＤ３（２／２）の巻線は同
じ鉄心に巻かれ、流れる電流がその共有する鉄心を同じ
向きに磁化するように極性が定められている。第１直流
リアクトルＬＤ３（１／２）は図１に示した直流リアク
トルＬＤ１に、第２直流リアクトルＬＤ３（２／２）は
図１に示した直流リアクトルＬＤ２にそれぞれ相当す
る。その他は図１に示した実施の形態と同機能の部品ま
たはアセンブリに同符号を付して説明を省略する。FIG. 2 is a connection diagram showing another embodiment of the arc machining apparatus of the present invention. In the figure, LD3
(1/2) is the first DC reactor, and LD3 (2 /
2) is a second DC reactor, and the windings of these DC reactors LD3 (1/2) and LD3 (2/2) are wound on the same iron core, and the flowing current magnetizes the shared iron core in the same direction. The polarity is defined as follows. The first DC reactor LD3 (1/2) corresponds to the DC reactor LD1 shown in FIG. 1, and the second DC reactor LD3 (2/2) corresponds to the DC reactor LD2 shown in FIG. In other respects, parts or assemblies having the same functions as those of the embodiment shown in FIG.
【００５２】図２の装置において、図１に示した実施の
形態と同様に、電極４を被加工物５に接触させると補助
電源の短絡電流が流れ始める。そして、電極４を被加工
物５から引き離すとき電流が急減してアークが切れよう
とするが、それまでに第２直流リアクトルＬＤ３（２／
２）に蓄えられていた電磁エネルギーによって電流の低
下をさまたげるために、小さなアークがとぎれることな
く、スムーズに溶接アークに移行できる。制御回路ＣＬ
１は電圧検出器ＤＴ１からの出力電圧の検出信号を入力
してアークが発生したことを判断し、サイリスタＳＣＲ
１を導通させ、引き続いてスイッチ回路Ｓ１をＯＦＦさ
せる。このとき、第２直流リアクトルＬＤ３（２／２）
に貯えられていた磁気エネルギーが鉄心を共有する第１
直流リアクトルＬＤ３（１／２）に移行する。すなわ
ち、第２直流リアクトルＬＤ３（２／２）に流れていた
電流が、直流リアクトルＬＤ３（２／２）とＬＤ３（１
／２）との巻数比に応じて変換されて、第１直流リアク
トルＬＤ３（１／２）に流れるようになるので、無駄な
く小さなアークから溶接アークに移行することができ、
スイッチ回路Ｓ１の閉路時に発生するサージ電圧がほと
んどなくなる。In the apparatus of FIG. 2, as in the embodiment shown in FIG. 1, when the electrode 4 is brought into contact with the workpiece 5, the short circuit current of the auxiliary power source starts to flow. Then, when the electrode 4 is separated from the workpiece 5, the current suddenly decreases and the arc tends to break, but by that time, the second DC reactor LD3 (2 /
The electromagnetic energy stored in 2) prevents a decrease in current, so that a small arc can be smoothly transferred to a welding arc without interruption. Control circuit CL
1 inputs the detection signal of the output voltage from the voltage detector DT1 and judges that an arc has occurred, and the thyristor SCR
The switch circuit S1 is turned off. At this time, the second DC reactor LD3 (2/2)
First, the magnetic energy stored in the
Transferred to DC reactor LD3 (1/2). That is, the current flowing in the second DC reactor LD3 (2/2) is changed to the DC reactors LD3 (2/2) and LD3 (1/2).
/ 2) is converted according to the winding ratio with the first DC reactor LD3 (1/2), so that it is possible to switch from a small arc to a welding arc without waste.
The surge voltage generated when the switch circuit S1 is closed is almost eliminated.
【００６０】図３は、本発明のアーク加工装置の実施の
形態を示す接続図である。同図において、Ｓ３はスイッ
チ回路、Ｔ２及びＴ３は変圧器である。その他は図１に
示した実施の形態と同機能の部品またはアセンブリに同
符号を付して説明を省略する。図１及び図２に示した実
施の形態においては、主電源及び補助電源をインバータ
トランスＴ１から供給する例を示したが、図３に示した
実施の形態は、補助電源として商用周波電源を用いたも
のである。補助電源の開閉手段はスイッチ回路Ｓ３であ
り、主電源の開閉手段はインバータ回路ＴＲ１である。
これらの開閉手段は、独立して開閉することができるた
めに、図１に示した２次整流回路ＤＲ２に接続していた
サイリスタＳＣＲ１は不要である。FIG. 3 is a connection diagram showing an embodiment of the arc machining apparatus of the present invention. In the figure, S3 is a switch circuit, and T2 and T3 are transformers. In other respects, parts or assemblies having the same functions as those of the embodiment shown in FIG. In the embodiment shown in FIGS. 1 and 2, the main power supply and the auxiliary power supply are supplied from the inverter transformer T1, but the embodiment shown in FIG. 3 uses a commercial frequency power supply as the auxiliary power supply. It was what I had. The opening / closing means for the auxiliary power supply is the switch circuit S3, and the opening / closing means for the main power supply is the inverter circuit TR1.
Since these opening / closing means can be opened / closed independently, the thyristor SCR1 connected to the secondary rectifier circuit DR2 shown in FIG. 1 is unnecessary.
【００６２】以上の説明において、補助電源の出力特性
に垂下特性を持たせるために、電流制限抵抗器Ｒ１を用
いているが、主電源と同様に、補助電源電流検出器ＣＴ
２で補助電源の出力電流を検出し、基準値と比較しフィ
ードバック制御を行うことにより、定電流特性又は垂下
特性を得るようにしてもよい。In the above description, the current limiting resistor R1 is used to give the output characteristic of the auxiliary power source a drooping characteristic, but like the main power source, the auxiliary power source current detector CT is used.
The constant current characteristic or the drooping characteristic may be obtained by detecting the output current of the auxiliary power source in step 2 and comparing it with a reference value to perform feedback control.
【００６４】[0064]
【発明の効果】本発明は、アークスタート時に電極と被
加工物とを一度短絡させた後に引き離す方式のアーク加
工装置において、補助電源の無負荷電圧を上げることな
くかつ垂下特性の傾斜をゆるめることなく補助電源の出
力回路に直列に直流リアクトルを接続することによって
電極を被加工物から引き離す時にサージ電圧を発生させ
て、出力電圧の不足を補うことによって、小さなアーク
を安定に発生させるので、電極が被加工物に固着するこ
となく、電極を被加工物から引き離すときに小さなアー
クがとぎれることがなく、スムーズに溶接アークを発生
させることができる。According to the present invention, in an arc machining apparatus of the type in which an electrode and a workpiece are short-circuited and then separated at the time of arc start, the slope of the drooping characteristic can be relaxed without raising the no-load voltage of the auxiliary power source. Instead of connecting a DC reactor in series to the output circuit of the auxiliary power supply, a surge voltage is generated when the electrode is separated from the workpiece, and a small arc is stably generated by compensating for the lack of output voltage. Does not stick to the work piece, a small arc does not break when the electrode is separated from the work piece, and a welding arc can be generated smoothly.
【図１】本発明のアーク加工装置の実施の形態を示す接
続図である。FIG. 1 is a connection diagram showing an embodiment of an arc processing apparatus of the present invention.
【図２】本発明のアーク加工装置の実施の形態を示す接
続図である。FIG. 2 is a connection diagram showing an embodiment of an arc processing apparatus of the present invention.
【図３】本発明のアーク加工装置の実施の形態を示す接
続図である。FIG. 3 is a connection diagram showing an embodiment of an arc processing apparatus of the present invention.
【図４】従来のアーク加工装置の例を示す接続図であ
る。FIG. 4 is a connection diagram showing an example of a conventional arc processing apparatus.
【図５】従来のアーク加工装置の出力特性を示す線図で
ある。FIG. 5 is a diagram showing an output characteristic of a conventional arc processing apparatus.
【図６】従来のアーク加工装置の出力特性を説明する線
図である。FIG. 6 is a diagram illustrating output characteristics of a conventional arc processing device.
１乃至３ １次入力線 ４ 電極 ５ 被加工物 ６ 電極側ケーブル ７ 被加工物側ケーブル ８ トーチスイッチ ９ 遠隔出力調整器 １０ 溶接電源 Ｃ１ 平滑コンデンサ Ｃ２ 平滑コンデンサ ＣＬ１ 制御回路 ＣＴ１ 出力電流検出器 ＣＴ２ 補助電源電流検出器 ＤＲ１ １次整流回路 ＤＲ２ ２次整流回路 ＤＲ３ 補助電源整流回路 ＤＴ１ 電圧検出器 ＬＤ１ 直流リアクトル ＬＤ２ 直流リアクトル ＬＤ３（１／２） 第１直流リアクトル ＬＤ３（２／２） 第２直流リアクトル Ｒ１ 電流制限抵抗器 Ｓ１ スイッチ回路 Ｓ３ スイッチ回路 ＳＣＲ１ サイリスタ Ｔ１ インバータトランス Ｔ２ 変圧器 Ｔ３ 変圧器 ＴＭ１ 電極側出力端子 ＴＭ２ 被加工物側出力端子 ＴＲ１ インバータ回路 1 to 3 Primary input line 4 electrodes 5 Workpiece 6 Electrode side cable 7 Workpiece side cable 8 torch switch 9 Remote output regulator 10 Welding power source C1 smoothing capacitor C2 smoothing capacitor CL1 control circuit CT1 output current detector CT2 Auxiliary power supply current detector DR1 primary rectifier circuit DR2 secondary rectifier circuit DR3 auxiliary power rectifier circuit DT1 voltage detector LD1 DC reactor LD2 DC reactor LD3 (1/2) 1st DC reactor LD3 (2/2) 2nd DC reactor R1 current limiting resistor S1 switch circuit S3 switch circuit SCR1 thyristor T1 inverter transformer T2 transformer T3 transformer TM1 electrode side output terminal TM2 Workpiece side output terminal TR1 inverter circuit
フロントページの続き (56)参考文献 特開 平８−229679（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B23K 9/067 B23K 9/073 B23K 9/10 Continuation of front page (56) Reference JP-A-8-229679 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) B23K 9/067 B23K 9/073 B23K 9/10
Claims (4)
前記主電源よりも高い無負荷電圧でかつ小電力容量の補
助電源とを並列に接続するとともに前記主電源及び前記
補助電源に出力開閉手段を設け、アーク起動時に前記補
助電源の出力開閉手段のみを閉路して電極を被加工物に
短絡させた後に引き離してアーク起動を行い、アークの
発生を検出して前記主電源の出力開閉手段を閉路するア
ーク加工装置において、前記補助電源の出力回路に直流
リアクトルを直列に接続したアーク加工装置。1. A main power supply for supplying electric power for arc machining and an auxiliary power supply having a no-load voltage higher than that of the main power supply and a small electric power capacity are connected in parallel, and an output is opened / closed to the main power supply and the auxiliary power supply. Means is provided, and when the arc is started, only the output opening / closing means of the auxiliary power supply is closed to short-circuit the electrode to the work piece and then the electrodes are separated to start the arc, and the arc opening is detected to detect the output of the main power supply. An arc machining apparatus for closing a circuit, wherein a DC reactor is connected in series to the output circuit of the auxiliary power supply.
前記主電源よりも高い無負荷電圧でかつ小電力容量の補
助電源とを並列に接続するとともに前記主電源及び前記
補助電源に出力開閉手段を設け、アーク起動時に前記補
助電源の出力開閉手段のみを閉路して電極を被加工物に
短絡させた後に引き離してアーク起動を行い、アークの
発生を検出して前記主電源の出力開閉手段を閉路するア
ーク加工装置において、前記主電源の出力回路に第１直
流リアクトルを直列に接続し、前記第１直流リアクトル
と前記補助電源に直列に接続した第２直流リアクトルと
が同一鉄心に巻かれた巻線を有しかつ各巻線がそれぞれ
に流れる電流によって共有する鉄心に同じ向きの磁束を
発生する極性に定められているアーク加工装置。2. A main power supply for supplying electric power for arc machining and an auxiliary power supply having a no-load voltage higher than that of the main power supply and a small electric power capacity are connected in parallel, and an output is opened / closed to the main power supply and the auxiliary power supply. Means is provided, and when the arc is started, only the output opening / closing means of the auxiliary power supply is closed to short-circuit the electrode to the work piece and then the electrodes are separated to start the arc, and the arc opening is detected to detect the output of the main power supply. In the arc machining apparatus for closing the circuit, the first DC reactor is connected in series to the output circuit of the main power supply, and the first DC reactor and the second DC reactor connected in series to the auxiliary power supply are wound on the same iron core. An arc machining device having different windings and having polarities that generate magnetic fluxes in the same direction in the iron core shared by the currents flowing in the respective windings.
路に直列に抵抗器を接続して垂下特性を得る請求項１又
は２のいずれかに記載のアーク加工装置。3. The arc machining apparatus according to claim 1, wherein the auxiliary power supply has a drooping characteristic by connecting a resistor in series with an output circuit of the auxiliary power supply.
の出力電流を検出しフィードバック制御によって定電流
特性又は垂下特性に制御する請求項１又は２のいずれか
に記載のアーク加工装置。4. The arc machining apparatus according to claim 1, wherein the output characteristic of the auxiliary power source is controlled to a constant current characteristic or a drooping characteristic by detecting the output current of the auxiliary power source and performing feedback control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32390395A JP3527579B2 (en) | 1995-11-16 | 1995-11-16 | Arc processing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32390395A JP3527579B2 (en) | 1995-11-16 | 1995-11-16 | Arc processing equipment |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14544595A Division JPH08229679A (en) | 1994-12-28 | 1995-05-18 | Arc working equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08309531A JPH08309531A (en) | 1996-11-26 |
| JP3527579B2 true JP3527579B2 (en) | 2004-05-17 |
Family
ID=18159905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32390395A Expired - Fee Related JP3527579B2 (en) | 1995-11-16 | 1995-11-16 | Arc processing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3527579B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5758115B2 (en) * | 2010-12-15 | 2015-08-05 | 株式会社ダイヘン | Arc welding machine |
| CN106862725B (en) * | 2017-01-19 | 2019-07-12 | 上海广为焊接设备有限公司 | The anti-stick circuit of inverter type welder |
-
1995
- 1995-11-16 JP JP32390395A patent/JP3527579B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08309531A (en) | 1996-11-26 |
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