JP2747338B2 - Wire conduction type TIG welding equipment - Google Patents
Wire conduction type TIG welding equipmentInfo
- Publication number
- JP2747338B2 JP2747338B2 JP1221710A JP22171089A JP2747338B2 JP 2747338 B2 JP2747338 B2 JP 2747338B2 JP 1221710 A JP1221710 A JP 1221710A JP 22171089 A JP22171089 A JP 22171089A JP 2747338 B2 JP2747338 B2 JP 2747338B2
- Authority
- JP
- Japan
- Prior art keywords
- output
- wire
- tig welding
- rectifier
- tig
- 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
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- Arc Welding Control (AREA)
- Arc Welding In General (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、溶加ワイヤを通電加熱するワイヤ通電式テ
ィグ溶接装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electric wire type TIG welding apparatus for energizing and heating a filler wire.
ワイヤ通電式ティグ溶接装置は、ティグ溶接の長所で
ある高品質の溶接を生かしながら、通電加熱した印加ワ
イヤを供給することによって溶着量を増し、高能率化を
図ったものであるが、問題点として、ティグアーク電流
とワイヤ通電電流が同時に流れると、相互に干渉して磁
気吹きを起こすことがある。この問題を解決するため、
ティグアーク電流を周期的に変化させ、その大電流期間
にはワイヤ通電電流を流さず、小電流期間にのみワイヤ
に通電する方式を提案されている。The wire-energized TIG welding system is designed to increase the amount of welding by supplying energized and heated wires while taking advantage of the high-quality welding that is an advantage of TIG welding, thereby increasing the amount of welding and increasing efficiency. If the TIG arc current and the wire conduction current flow simultaneously, they may interfere with each other and cause magnetic blowing. To solve this problem,
There has been proposed a method in which a TIG arc current is periodically changed, and a current is not supplied to a wire during a large current period, but is supplied to a wire only during a small current period.
しかし、このようなワイヤ通電式ティグ溶接装置で
は、通常、アーク発生用とワイヤ通電用の独立した2電
源を必要とし、電源部が大形となっていた。However, such a wire-powered TIG welding apparatus usually requires two independent power supplies for arc generation and wire power supply, and the power supply unit is large.
本発明の目的は、ワイヤ通電式ティグ溶接装置の問題
点であるティグアーク電流とワイヤ通電電流の相互干渉
をなくし、かつ電源の小形化を達成することにある。さ
らに他の目的は、1台の電源を交流ティグ溶接にも切換
えて使用できるワイヤ通電式ティグ溶接装置を提供する
ことにある。SUMMARY OF THE INVENTION An object of the present invention is to eliminate mutual interference between a TIG arc current and a wire conduction current, which are problems of a wire conduction type TIG welding apparatus, and to achieve a compact power supply. Still another object is to provide a wire-energized TIG welding apparatus that can switch and use one power supply for AC TIG welding.
上記の目的を達成するため、請求項1に記載の発明
は、溶接電源に、商用交流入力を直流に変換する一次側
整流部と、該整流部の直流出力を高周波交流に変換して
変圧器一次側に印加するインバータと、変圧器二次側の
交流出力を直流に変換する二次側整流素子と、該整流素
子の直流出力をティグ溶接用電極と溶加ワイヤの給電チ
ップとに交互に供給するように制御される一対のスイッ
チング素子と、該スイッチング素子の入力側と帰線との
間に接続された一対のコンデンサと、該コンデンサに充
電する一対の再点弧用電圧源とを設けたことを特徴とす
る。In order to achieve the above object, an invention according to claim 1 includes, in a welding power source, a primary rectifier for converting a commercial AC input to DC, and a transformer for converting a DC output of the rectifier to a high-frequency AC. An inverter to be applied to the primary side, a secondary side rectifier for converting the AC output of the transformer secondary to DC, and a DC output of the rectifier alternately to a TIG welding electrode and a power supply tip of a filler wire. A pair of switching elements controlled to be supplied, a pair of capacitors connected between an input side of the switching elements and a return line, and a pair of re-ignition voltage sources for charging the capacitors are provided. It is characterized by having.
また、上記他の目的を達成するために請求項2記載の
発明は、溶接電源に、商用交流入力を直流に変換する一
次側整流部と、該整流部の直流出力を高周波交流に変換
して変圧器一次側に印加するインバータと、変圧器二次
側の交流出力を中性点に対して正方向と負方向の直流出
力に変換する2組の二次側整流素子と、これら2組の二
次側整流素子の出力側にそれぞれ接続され、正方向の直
流出力と負方向の直流出力を交互に負荷に供給するよう
に制御される1対のスイッチング素子とを設け、前記1
対のスイッチング素子のうち負方向の直流出力を供給す
るスイッチング素子の出力側をティグ溶接用電極に常時
接続し、正方向の直流出力を供給するスイッチング素子
の出力側を別に設けた切換スイッチによりティグ溶接用
電極と溶加ワイヤの給電チップとに切換え接続できるよ
うにしたことを特徴とする。According to another aspect of the present invention, a welding power supply includes a primary rectifier that converts a commercial AC input into DC, and a DC output of the rectifier that is converted into a high-frequency AC. An inverter applied to the primary side of the transformer, two sets of secondary-side rectifying elements for converting the AC output of the secondary side of the transformer into DC outputs in the positive and negative directions with respect to the neutral point, and A pair of switching elements respectively connected to the output side of the secondary side rectifier and controlled to alternately supply a positive DC output and a negative DC output to a load;
The output side of the switching element that supplies the DC output in the negative direction of the pair of switching elements is always connected to the electrode for TIG welding, and the output side of the switching element that supplies the DC output in the positive direction is switched by a switch provided separately. It is characterized in that it can be switched and connected to the welding electrode and the power supply tip of the filler wire.
〔作用〕 請求項1記載の発明では、インバータの高周波交流出
力を変圧器で適当に降圧した後、二次側整流素子により
直流に変換し、その直流出力を1対のスイッチング素子
によってティグ溶接用電極とワイヤ給電チップとに交互
に供給することにより、1台のインバータ制御電源でテ
ィグアーク電流とワイヤ通電電流を相互干渉することな
く供給できるようにしている。[Operation] In the invention according to claim 1, after the high-frequency AC output of the inverter is appropriately stepped down by a transformer, it is converted into DC by a secondary-side rectifying element, and the DC output is used for TIG welding by a pair of switching elements. By alternately supplying the electrode and the wire feeding chip, a single inverter control power supply can supply the TIG arc current and the wire current without interfering with each other.
また、請求項2記載の発明では、インバータの高周波
交流出力を変圧器で適当に降圧した後、2組の二次側整
流素子により中性点に対して正方向と負方向の直流出力
に変換し、交流ティグ溶接時には1対のスイッチング素
子によって正方向の直流出力と負方向の直流出力を交互
にティグ溶接用電極に供給し、ワイヤ通電式ティグ溶接
時には前記1対のスイッチング素子によって負方向の直
流出力をティグ溶接用電極に、正方向の直流出力をワイ
ヤ給電チップに交互に供給することにより、1台のイン
バータ制御電源を交流ティグ溶接とワイヤ通電式ティグ
溶接に切換えて使用できるようにしている。According to the second aspect of the present invention, the high-frequency AC output of the inverter is appropriately stepped down by a transformer, and then converted into a DC output in a positive direction and a negative direction with respect to a neutral point by two sets of secondary rectifiers. During AC TIG welding, a positive DC output and a negative DC output are alternately supplied to a TIG welding electrode by a pair of switching elements. By alternately supplying a DC output to the TIG welding electrode and a positive DC output to the wire feed tip, one inverter control power supply can be switched between AC TIG welding and wire-on TIG welding and used. I have.
以下、本発明の一実施例を図面により説明する。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第1図において、1は商用交流入力を直流に変換する
一次側整流部、2は整流部1の直流出力を高周波交流に
変換するインバータ、3はインバータ2の高周波交流出
力を溶接に適した電圧に降圧する変圧器で、高周波を印
加することにより小形化が図られている。4−1〜4−
4は二次側整流素子で、変圧器二次側の中性点(センタ
タップ)Nに対して1組の整流素子4−1,4−2からは
負方向の直流出力を、他の1組の整流素子4−3,4−4
からは正方向の直流出力を取り出し得るように接続され
ている。5−1,5−2は前記2組の二次側整流素子4−
1,4−2および4−3,4−4の出力側にそれぞれ接続され
たスイッチング素子としてのトランジスタで、トランジ
スタ5−1は負方向の直流出力を、またトランジスタ5
−2は正方向の直流出力を交互に負荷に供給するように
駆動回路6からの信号によって制御される。7はティグ
溶接用電極で、ノズルは図示していない。8は母材、9
は溶加ワイヤで、ワイヤ送給装置10により給電チップ11
を経て母材8の溶融池に送り込まれる。前記1対のトラ
ンジスタ5−1,5−2のうち負方向の直流出力を供給す
るトランジスタ5−1の出力側は電極7に常時接続され
ており、正方向の直流出力を供給するトランジスタ5−
2の出力側は切換スイッチ12により電極7と給電チップ
11とに切換え接続されるようになっている。この切換ス
イッチ12によって交流ティグ溶接とワイヤ通電式ティグ
溶接の切換ができる。13は母材8と中性点Nを結ぶ帰
線、14は帰線13に接続された電流検出器、15は帰線13に
接続された平滑用リアクタ、16−1,16−2はトランジス
タ5−1,5−2の入力側と帰線13との間に電流制限抵抗1
7−1,17−2と直列に接続されたコンデンサ、18−1,18
−2はコンデンサ16−1,16−2をティグアークの再点弧
に必要な電圧(約200V)に充電する再点弧用電圧源、19
−1,19−2はトランジスタ5−1,5−2に逆並列接続さ
れた過渡電圧吸収用ダイオードである。電流検出器14の
検出信号は信号切換器22によって切換えられるティグア
ーク電流(Ia)の設定信号20およびワイヤ通電電流
(Iw)の設定信号21と誤差増幅器23で比較し、その誤
差信号PWM制御回路24の制御入力としてインバータ2の
出力を制御する。In FIG. 1, reference numeral 1 denotes a primary rectifier for converting a commercial AC input into DC, 2 an inverter for converting the DC output of the rectifier 1 to high-frequency AC, and 3 a voltage suitable for welding the high-frequency AC output of the inverter 2 for welding. The size of the transformer is reduced by applying a high frequency. 4-1 to 4-
Reference numeral 4 denotes a secondary-side rectifying element, which outputs a negative direct-current output from one set of rectifying elements 4-1 and 4-2 to a neutral point (center tap) N on the secondary side of the transformer. Set of rectifying elements 4-3, 4-4
Are connected so that a DC output in the positive direction can be taken out. 5-1 and 5-2 are the two sets of secondary side rectifiers 4-
1, 4-2 and 4-3, 4-4, each of which is a transistor as a switching element connected to the output side.
-2 is controlled by a signal from the drive circuit 6 so as to alternately supply a positive DC output to the load. Reference numeral 7 denotes a TIG welding electrode, and the nozzle is not shown. 8 is the base material, 9
Is a filler wire, and a wire feeder 10 feeds a chip 11
Is sent to the molten pool of the base material 8. The output side of the transistor 5-1 for supplying a negative DC output of the pair of transistors 5-1 and 5-2 is always connected to the electrode 7, and the transistor 5- for supplying a positive DC output is provided.
The output side of 2 is connected to the electrode 7 and the power supply chip by the changeover switch 12.
The connection is switched to 11. The changeover switch 12 can switch between AC TIG welding and wire-energized TIG welding. 13 is a return line connecting the base material 8 and the neutral point N, 14 is a current detector connected to the return line 13, 15 is a smoothing reactor connected to the return line 13, and 16-1 and 16-2 are transistors. Current limiting resistor 1 between input side of 5-1 and 5-2 and return line 13
Capacitors connected in series with 7-1 and 17-2, 18-1 and 18
-2 is a re-ignition voltage source for charging the capacitors 16-1 and 16-2 to a voltage (about 200 V) necessary for re-ignition of the TIG arc;
-1,19-2 are transient voltage absorbing diodes connected in anti-parallel to the transistors 5-1 and 5-2. Detection signal from the current detector 14 compares the setting signal 21 and error amplifier 23 of the setting signal 20 and the wire current applied Tiguaku current that is switched by the signal switcher 22 (I a) (I w ), the error signal PWM control The output of the inverter 2 is controlled as a control input of the circuit 24.
交流ティグ溶接時とワイヤ通電式ティグ溶接時の動作
を第1図〜第3図を参照して説明すれば、次のようであ
る。The operation at the time of AC TIG welding and at the time of wire-energized TIG welding will be described with reference to FIGS. 1 to 3 as follows.
(1) 交流ティグ溶接 第1図において、切換スイッチ12のa接点側を閉じる
と、トランジスタ5−1のオン期間には電極マイナスと
なるような極性の電圧が電極7に印加され、またトラン
ジスタ5−2のオン期間には電極プラスとなるような極
性の電圧が電極7に印加されるため、電極7と母材8の
間に交流ティグアークが発生する。この場合、トランジ
スタ5−1のターンオン時には、コンデンサ16−1の充
電電圧が電極−母材間に電極マイナスの極性で印加さ
れ、またトランジスタ5−2のターンオン時にはコンデ
ンサ16−2の充電電圧が電極−母材間に電極プラスの極
性で印加されることにより、極性反転後のアークの再点
弧を助ける。すなわち、アーク電流Ia、コンデンサ16
−1,16−2の放電電流Ic1,Ic2の波形は第2図に示すよ
うになり、トランジスタ5−1のオン期間T1、トラン
ジスタ5−2のオン期間T2により定まる周期で極性反
転するアーク電流Iaが流れ、その電流値は設定信号20
に対応した値となるようにインバータ2で制御される。(1) AC TIG Welding In FIG. 1, when the a contact side of the changeover switch 12 is closed, a voltage having a negative polarity is applied to the electrode 7 during the ON period of the transistor 5-1. During the on-period of −2, a voltage having such a polarity that the electrode becomes positive is applied to the electrode 7, so that an AC TIG arc is generated between the electrode 7 and the base material 8. In this case, when the transistor 5-1 is turned on, the charging voltage of the capacitor 16-1 is applied between the electrode and the base material with the negative polarity of the electrode, and when the transistor 5-2 is turned on, the charging voltage of the capacitor 16-2 is applied to the electrode. -Applied with a positive polarity between the electrodes to help reignite the arc after polarity reversal. That is, the arc current I a , the capacitor 16
The waveforms of the discharge currents I c1 and I c2 of −1 and 16-2 are as shown in FIG. 2 , and the polarities are at a period determined by the on period T 1 of the transistor 5-1 and the on period T 2 of the transistor 5-2. The reversing arc current Ia flows, and its current value is
Is controlled by the inverter 2 so as to have a value corresponding to.
交流ティグ溶接において、トランジスタ5−1,5−2
のターンオフにより負荷ケーブルに生じる過渡電圧はそ
れぞれダイオード19−2,19−1を介してコンデンサ16−
2,16−1に吸収され、またリアクタ15に生じる過渡電圧
は変圧器3の二次側と整流素子4−1〜4−4を介して
コンデンサ16−1,16−2に吸収される。In AC TIG welding, transistors 5-1 and 5-2
Transient voltage generated in the load cable due to turn-off of the capacitor 16-
The transient voltage generated in the reactor 15 is absorbed by the capacitors 16-1 and 16-2 via the secondary side of the transformer 3 and the rectifiers 4-1 to 4-4.
(2) ワイヤ通電式ティグ溶接 第1図において、切換スイッチ12のb接点側を閉じる
と、電極7にはトランジスタ5−1のオン期間にのみ電
極マイナスとなるような極性の電圧が印加され、それに
よって電極7と母材8の間に直流ティグアークが発生す
る。一方、トランジスタ5−2のオン期間には、トラン
ジスタ5−2と切換スイッチ12を介して給電チップ11に
ワイヤ通電電流Iwが流れ、溶加ワイヤ9を通電加熱す
る。よって、トランジスタ5−1,5−2のオンオフ切換
と信号切換器22での電流設定信号20,21の切換を同期さ
せることにより、第3図に示すようなアーク電流Iaと
ワイヤ通電電流Iwが交互に供給され、それぞれの電流
値は設定信号20,21に対応した値となるようにインバー
タで制御される。アーク電流Iaとワイヤ通電電流Iwは
連続でなく、図示のように間欠的に流れる。この場合
も、トランジスタ5−1のターンオン時にコンデンサ16
−1の充電電圧を電極−母材間に印加することにより、
アークの再点弧を助けることができる。(2) Wire conduction type TIG welding In FIG. 1, when the b contact side of the changeover switch 12 is closed, a voltage having a polarity such that the electrode becomes negative only during the ON period of the transistor 5-1 is applied to the electrode 7, Thus, a DC TIG arc is generated between the electrode 7 and the base material 8. On the other hand, the on period of the transistor 5-2, the power supply tip 11 through the transistor 5-2 and the changeover switch 12 wire energization current I w flows energized heating the filler wire 9. Therefore, by synchronizing the on / off switching of the transistors 5-1 and 5-2 with the switching of the current setting signals 20 and 21 in the signal switch 22, the arc current Ia and the wire conduction current Ia as shown in FIG. w is supplied alternately, and the respective current values are controlled by the inverter so as to be values corresponding to the setting signals 20 and 21. The arc current Ia and the wire current Iw are not continuous, but flow intermittently as shown. Also in this case, the capacitor 16 is turned on when the transistor 5-1 is turned on.
By applying a charging voltage of -1 between the electrode and the base material,
It can help reignite the arc.
このようにアーク電流Iaを間欠的に流すのではな
く、主たるアーク電流はワイヤ通電電流Iwと交互に流
すが、ワイヤ通電中も小電流のアークを維持するため、
変圧器3の補助巻線25を利用し、別に設けた整流素子26
と電流制限抵抗27を介して電極−母材間に電流を供給す
るようにしてもよい。Thus instead of passing a arc current I a intermittently, the main arc current is passed alternately with the wire energization current I w, since even during the wire energization to maintain the arc of a small current,
A rectifying element 26 provided separately using the auxiliary winding 25 of the transformer 3
And a current may be supplied between the electrode and the base material via the current limiting resistor 27.
また、本実施例では切換スイッチ12により交流ティグ
溶接とワイヤ通電式ティグ溶接の切換を可能にしている
が、切換スイッチ12をなくし、トランジスタ5−2の出
力側を給電チップ11に常時接続して、ワイヤ通電式ティ
グ溶接専用機としてもよい。Further, in this embodiment, the switching between the AC TIG welding and the wire conduction type TIG welding is enabled by the changeover switch 12, but the changeover switch 12 is eliminated, and the output side of the transistor 5-2 is always connected to the power supply chip 11. Alternatively, it may be a dedicated wire welding type TIG welding machine.
ワイヤ通電式ティグ溶接専用機では、二次側整流素子
を2組設ける必要はなく、4−1,4−2の1組の整流素
子のみを用い、その直流出力を1対のスイッチング素子
により電極7と給電チップ11に交互に供給するようにす
れば、溶接電源をさらに簡素化できる。It is not necessary to provide two sets of rectifying elements on the secondary side in the wire-energized TIG welding machine. Only one set of rectifying elements 4-1 and 4-2 is used, and the DC output is controlled by a pair of switching elements. By alternately supplying the power to the power supply 7 and the power supply chip 11, the welding power source can be further simplified.
請求項1記載の発明によれば、1台のインバータ制御
電源でティグアーク電流とワイヤ通電電流を交互に供給
できるので、両電流の相互干渉による磁気吹き現象を起
こすことなくワイヤ通電式ティグ溶接を実施でき、かつ
溶接電源を小形化することができる。According to the first aspect of the present invention, the TIG arc current and the wire conduction current can be alternately supplied by one inverter control power supply, so that the wire conduction type TIG welding can be performed without causing a magnetic blowing phenomenon due to mutual interference between the two currents. And the welding power source can be downsized.
また、請求項2記載の発明によれば、上記効果に加え
て1台の電源を交流ティグ溶接とワイヤ通電式ティグ溶
接に切換えて使用することができ、より利用価値の高い
ものとすることができる。According to the second aspect of the present invention, in addition to the above effects, one power supply can be switched between AC TIG welding and wire-energized TIG welding to be used, so that it is possible to increase the utility value. it can.
第1図は本発明の一実施例を示す回路図、第2図および
第3図はその動作説明図である。 1……一次側整流部、2……インバータ、3……変圧
器、4−1〜4−4……二次側整流素子、5−1,5−2
……スイッチング素子、6……駆動回路、7……ティグ
溶接用電極、8……母材、9……溶加ワイヤ、11……給
電チップ、12……切換スイッチ、N……中性点。FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIGS. 2 and 3 are explanatory diagrams of its operation. 1. Primary rectifier, 2. Inverter, 3. Transformer, 4-1 to 4-4. Secondary rectifier, 5-1 and 5-2
... Switching element, 6 ... Drive circuit, 7 ... Tig welding electrode, 8 ... Base metal, 9 ... Solution wire, 11 ... Power supply tip, 12 ... Switch, N ... Neutral point .
Claims (2)
ィグ溶接装置において、溶接電源に、商用交流入力を直
流に変換する一次側整流部と、該整流部の直流出力を高
周波交流に変換して変圧器一次側に印加するインバータ
と、変圧器二次側の交流出力を直流に変換する二次側整
流素子と、該整流素子の直流出力をティグ溶接用電極と
溶加ワイヤの給電チップとに交互に供給するように制御
される一対のスイッチング素子と、該スイッチング素子
の入力側と帰線との間に接続された一対のコンデンサ
と、該コンデンサに充電する一対の再点弧用電圧源とを
設けたことを特徴とするワイヤ通電式ティグ溶接装置。In a wire welding type TIG welding apparatus for electrically heating a filler wire, a welding power source converts a commercial AC input into DC, a primary rectifier, and converts a DC output of the rectifier into high-frequency AC. An inverter applied to the transformer primary side, a secondary rectifier for converting the AC output of the transformer secondary to DC, a DC output of the rectifier for the TIG welding electrode and a power supply tip of the filler wire. , A pair of capacitors connected between the input side of the switching element and the return line, and a pair of re-ignition voltage sources for charging the capacitors. And a wire-energized TIG welding apparatus characterized in that:
ィグ溶接装置において、溶接電源に、商用交流入力を直
流に変換する一次側整流部と、該整流部の直流出力を高
周波交流に変換して変圧器一次側に印加するインバータ
と、変圧器二次側の交流出力を中性点に対して正方向と
負方向の直流出力に変換する2組の二次側整流素子と、
これら2組の二次側整流素子の出力側にそれぞれ接続さ
れ、正方向の直流出力と負方向の直流出力を交互に負荷
に供給するように制御される1対のスイッチング素子と
を設け、前記1対のスイッチング素子のうち負方向の直
流出力を供給するスイッチング素子の出力側をティグ溶
接用電極に常時接続し、正方向の直流出力を供給するス
イッチング素子の出力側を別に設けた切換スイッチティ
グ溶接用電極と溶加ワイヤの給電チップとに切換え接続
できるようにしたことを特徴とするワイヤ通電式ティグ
溶接装置。2. A wire welding type TIG welding apparatus for heating a filler wire by heating a welding power source, a primary rectifier for converting a commercial AC input into DC, and a DC output of the rectifier for converting into a high frequency AC. An inverter applied to the transformer primary side, and two sets of secondary side rectifiers for converting the AC output of the transformer secondary side into a DC output in a positive direction and a negative direction with respect to a neutral point;
A pair of switching elements respectively connected to the output sides of these two sets of secondary-side rectifying elements and controlled to alternately supply a positive DC output and a negative DC output to a load; A switching switch TIG in which the output side of a switching element supplying a negative DC output of a pair of switching elements is always connected to a TIG welding electrode, and the output side of the switching element supplying a DC output in a positive direction is separately provided. A wire-energized TIG welding apparatus characterized in that it can be switched and connected to a welding electrode and a power supply tip of a filler wire.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1221710A JP2747338B2 (en) | 1989-08-30 | 1989-08-30 | Wire conduction type TIG welding equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1221710A JP2747338B2 (en) | 1989-08-30 | 1989-08-30 | Wire conduction type TIG welding equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0386377A JPH0386377A (en) | 1991-04-11 |
JP2747338B2 true JP2747338B2 (en) | 1998-05-06 |
Family
ID=16771056
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1221710A Expired - Lifetime JP2747338B2 (en) | 1989-08-30 | 1989-08-30 | Wire conduction type TIG welding equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2747338B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140263233A1 (en) * | 2013-03-15 | 2014-09-18 | Lincoln Global, Inc. | Tandem hot-wire systems |
US20140263234A1 (en) * | 2013-03-15 | 2014-09-18 | Lincoln Global, Inc. | Tandem hot-wire systems |
US20140263232A1 (en) * | 2013-03-15 | 2014-09-18 | Lincoln Global, Inc. | Tandem hot-wire systems |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0352770A (en) * | 1989-07-19 | 1991-03-06 | Babcock Hitachi Kk | Hot wire type arc welding equipment |
-
1989
- 1989-08-30 JP JP1221710A patent/JP2747338B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0386377A (en) | 1991-04-11 |
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