JPS6061174A - Method for controlling welding machine - Google Patents
Method for controlling welding machineInfo
- Publication number
- JPS6061174A JPS6061174A JP16840083A JP16840083A JPS6061174A JP S6061174 A JPS6061174 A JP S6061174A JP 16840083 A JP16840083 A JP 16840083A JP 16840083 A JP16840083 A JP 16840083A JP S6061174 A JPS6061174 A JP S6061174A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- welding
- arc
- voltage
- tip
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
- B23K9/067—Starting the arc
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕 本発明は、消耗性電極として溶接
ワイヤを用いる自動または半自動アーク溶接機において
、溶接終了時の溶接ワイヤの先端部形状をアークスター
トが円滑に行なえるような形状とするだめの溶接機制御
法に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention is an automatic or semi-automatic arc welding machine that uses a welding wire as a consumable electrode. This paper relates to a method of controlling a welding machine to create a shape that is similar to that of a welding machine.
〔発明の背景〕 近年、溶接作業の自動化が進むに伴い
、瞬時アークスタート率（瞬時アークスタートとは、溶
接ワイヤが母材に接触した瞬間に通電が始まり、その後
、溶接電流が切れることなく定常アークへ移行すること
をいう）の向上が強く要求されるようになった。一般に
アークスタートを円滑に行なうためには、溶接ワイヤの
先端部が刃物で斜めに切断した時に得られるようなスラ
グの付着していない鋭利な形状になっているのが理想的
とされているが、従来のこの種溶接機では、溶接終了時
の溶接ワイヤの先端部形状をこのような理想的形状とす
ることは望めなかった。[Background of the Invention] In recent years, with the advancement of automation in welding work, the instantaneous arc start rate (instantaneous arc start means that current starts flowing the moment the welding wire comes into contact with the base metal, and then the welding current remains steady without cutting off). There is now a strong demand for improvement in the ability to move to an arc. Generally, in order to perform a smooth arc start, it is considered ideal that the tip of the welding wire be sharp and free of slag, such as that obtained when cutting diagonally with a knife. With conventional welding machines of this type, it has not been possible to achieve such an ideal shape at the tip of the welding wire at the end of welding.
次に、図面を参照して従来技術とその問題点を詳しく説
明する。Next, the prior art and its problems will be explained in detail with reference to the drawings.
第１図は、従来のこの種溶接機における溶接終了時の制
御シーケンスを示す。溶接電源は定電圧特性の直流電源
で、サイリスタの位相制御により出力電圧の調整を行な
うものとする。第１図において、溶接停止信号が発生す
ると、溶接ワイヤ送給モータにも停止指令が行き、同時
にブレーキ回路が作動し、時間ｔ１後にワイヤ送給が完
全停止する。このとき、出力電圧制御バイアス（サイリ
スク点弧角を制御するための信号で、バイアス量が大き
いほど出力電圧は高くなる）は、溶接終了時の溶接ワイ
ヤ先端部形状が太き（ならないように、漸減させる〔第
１図（ト））のイ〕か、または一定値〔第１図（ト））
の口〕まで下げる制御方法である。FIG. 1 shows a control sequence at the end of welding in a conventional welding machine of this type. The welding power source is a DC power source with constant voltage characteristics, and the output voltage is adjusted by controlling the phase of a thyristor. In FIG. 1, when a welding stop signal is generated, a stop command is also sent to the welding wire feeding motor, the brake circuit is activated at the same time, and the wire feeding is completely stopped after time t1. At this time, the output voltage control bias (a signal for controlling the silisk firing angle; the larger the bias amount, the higher the output voltage) is set so that the tip of the welding wire at the end of welding becomes thick. Gradually decrease [Figure 1 (G)) A] or keep it at a constant value [Figure 1 (G))
This is a control method that lowers the temperature to the mouth of the user.
この方法によると、溶接終了時の溶接ワイヤ先端部形状
は第２図に示すようになる。すなわち、溶接ワイヤ１の
先端部２は表面張力により球形状となり、時々（１００
回中加〜Ｉ回程度）、先端部２にスラグ（溶接ワイヤに
含まれているＳ工や他の金属酸化物等が析出したガラス
質の非導電体）３が残る。このスラグ３が残った状態で
再溶接をしようとすると、溶接開始時ワイヤ先端部２が
母材に接触しても、スラグ３により通電が阻害され、ア
ークが発生しなかったり、発生したとしても次に述べる
理由により定常アークへ移行できないことが多い。すな
わち、溶接ワイヤは連続して送給されるため、第３図に
示すように溶接ワイヤ１が変形してスラグ３以外の部分
で母材４に接触すると通電が始まるが、このときはワイ
ヤ先端部２と母材４の接触点がワイヤの送給により強く
加圧され、この部分の接触抵抗が低下１〜ているため、
抵抗加熱によるワイヤ溶断が先端部２で行なわれず、先
端部２より１０朋程度上方のワイヤ突き出し部の中間部
分、またはノズルチップ５の出口付近で溶断することに
なり、その結果、溶断直後のアーク長が伸びてアークを
維持しきれず、アーク切れやバーンバックが生じて定常
アークへ移行できなくなるのである。According to this method, the shape of the tip of the welding wire at the end of welding becomes as shown in FIG. That is, the tip 2 of the welding wire 1 becomes spherical due to surface tension, and sometimes (100
During the welding process (approximately 1 to 1 times), slag (a glassy non-conductor containing deposits of S and other metal oxides contained in the welding wire) 3 remains at the tip 2. If you try to re-weld with this slag 3 remaining, even if the wire tip 2 contacts the base metal at the start of welding, the slag 3 will block current flow, and no arc will occur, or even if it occurs, It is often not possible to transition to a steady arc for the reasons described below. That is, since the welding wire is continuously fed, as shown in Fig. 3, when the welding wire 1 deforms and comes into contact with the base metal 4 at a portion other than the slag 3, energization starts; however, at this time, the tip of the wire The contact point between the part 2 and the base material 4 is strongly pressurized by the feeding of the wire, and the contact resistance at this part is reduced by 1.
The wire is not fused at the tip 2 due to resistance heating, and the wire is fused at the middle of the protruding portion of the wire about 10 mm above the tip 2 or near the exit of the nozzle tip 5. As a result, the arc immediately after the fusion occurs. As the length increases, the arc cannot be maintained, and arc breakage and burnback occur, making it impossible to transition to a steady arc.
ワイヤ先端部２０球径な小さくすると、スラグが残留す
る確率は少なくなるが、スラグ３のワイヤ先端部への付
着力は、球径の小さい方がむしろ強力で母材に接触して
も容易に剥がれなくなる（ワイヤ先端部の体積が小さい
ことにより、溶接停止時に急冷されるためと推定する）
。このため、自動溶接機においては、母材に対するワイ
ヤ送給方向が垂直に近いほど、瞬時アークスタート率が
低下するという問題点があった。If the ball diameter of the wire tip 20 is made smaller, the probability that slag will remain will decrease, but the adhesion force of the slag 3 to the wire tip is stronger when the ball diameter is smaller, and it is easier to contact the base material. No longer peeling off (we assume this is because the wire tip has a small volume and is rapidly cooled when welding is stopped)
. Therefore, automatic welding machines have a problem in that the closer the wire feeding direction to the base material is perpendicular, the lower the instantaneous arc start rate becomes.
〔発明の目的〕 本発明の目的は、溶接終了時の溶接ワ
イヤ先端部をスラグが残留しないほぼ理想的な形状とし
て、アークスタートが円滑に行なえるようにすることに
ある。[Object of the Invention] An object of the present invention is to make the tip of the welding wire at the end of welding into a substantially ideal shape with no residual slag, so that arc starting can be performed smoothly.
〔発明の概要〕 本発明は、消耗性電極として溶接ワイ
ヤを用いる自動または半自動アーク溶接機において、溶
接停止後に溶接機出力電圧を下げて所定時間溶接ワイヤ
を母材に接触短絡させた状態で抵抗加熱する段階と、そ
の後、溶接機出力電圧を上げて溶接ワイヤを溶断させる
段階と、溶断後のアーク発生を検知してほぼ瞬間的に電
圧印加を停止する段階とを含み、溶接終了時の溶接ワイ
ヤの先端部形状が鋭利となるように制御することを特徴
とする溶接機制御法である。[Summary of the Invention] The present invention provides an automatic or semi-automatic arc welding machine that uses a welding wire as a consumable electrode. The process includes a heating step, a step of increasing the output voltage of the welding machine to melt the welding wire, and a step of detecting arc generation after the welding and stopping voltage application almost instantaneously. This is a welding machine control method characterized by controlling the shape of the tip of the wire to be sharp.
〔発明の実施例〕 本発明の一実施例を第４図〜第６図
により説明する。[Embodiment of the Invention] An embodiment of the present invention will be described with reference to FIGS. 4 to 6.
第４図は制御シーケンスの一例を示す図で、（Ａ）溶接
起動／停止信号、ω）溶接電流、（Ｃ）溶接電圧、（ト
）ワイヤ送給モータ再起電圧、（ト））出力電圧制御バ
イアスの各タイムチャートである。溶接電源の種類およ
び出力電圧調整の仕方は第１図の場合と同様とする。本
例では、溶接停止信号が発生した瞬間よりｔ８で示す所
定時間、出力電圧制御バイアスを溶接ワイヤと母材の短
絡状態を維持できる程度のレベルｖ１まで下げ、溶接ワ
イヤを母材に接触短絡させた状態で抵抗加熱する。ｔ８
は６０〜２５０ ｍｓ程度、Ｖ工は出力電圧制御バイア
スの定常値Ｖ。を１００としたとき、２０〜４０％程度
とする。ｔ８時間経過後、出力電圧制御バイアスを溶接
ワイヤの溶断に必要なレベルｖ２まで上げ、溶断後のア
ーク発生を検知してｔ４で示す所定時間経過後にほぼ瞬
間的に出力電圧制御バイアスをゼロにしてワイヤ、母材
間への電圧印加を停止するようにしである。■Ｑは出力
電圧制御バイアスの定常値を１００としたとき、３０〜
６０％程度、ｔ４は１〜１０ｍ５程度とする。Fig. 4 is a diagram showing an example of a control sequence, (A) welding start/stop signal, ω) welding current, (C) welding voltage, (g) wire feeding motor restart voltage, (g) output voltage control. This is a time chart of each bias. The type of welding power source and the method of adjusting the output voltage are the same as in the case of FIG. In this example, for a predetermined period of time indicated by t8 from the moment when the welding stop signal is generated, the output voltage control bias is lowered to a level v1 that can maintain the short circuit state between the welding wire and the base metal, and the welding wire is contacted and short-circuited to the base metal. Resistance heating is performed in the same state. t8
is about 60 to 250 ms, and V is the steady value V of the output voltage control bias. When 100, it is about 20 to 40%. After time t8 has elapsed, the output voltage control bias is increased to the level v2 necessary for fusing the welding wire, and arc generation after the fusing is detected, and after a predetermined time indicated by t4, the output voltage control bias is almost instantaneously reduced to zero. The voltage application between the wire and the base metal should be stopped. ■Q is 30 to 30 when the steady value of output voltage control bias is 100.
60%, and t4 is approximately 1 to 10 m5.
なお、溶接停止信号が発生すると、ワイヤ送給モータに
停止指令が行き、ブレーキ回路が作動することは第１図
の場合と変わらない。It should be noted that when a welding stop signal is generated, a stop command is sent to the wire feed motor and the brake circuit is activated, as in the case of FIG. 1.
第５図は、（４）溶接終了時の溶接電圧の推移と、（Ｂ
）ワイヤ先端部形成の模様を相関的に示した図である。Figure 5 shows (4) the transition of welding voltage at the end of welding, and (B
) is a diagram showing the pattern of wire tip formation in a correlated manner.
同図に示すように、ｔ８時間の始め■で溶接ワイヤ１が
母材４に短絡接触（融着）し、抵抗加熱が始まる。抵抗
加熱で加熱された溶接ワイヤ１は、ワイヤ送給モータの
慣性により■、＠のように変形し、ｔ８時間後の溶接機
出力電圧の上昇により■で溶断される。ワイヤ溶断は、
上記したワイヤの抵抗加熱と加圧変形により、図に示し
たようなワイヤ突き出し部の中間部分で起こる。ワイヤ
溶断後のｔ４時間は、母材側の残留ワイヤ６をアーク７
により母材４に溶かし込み、溶接ワイヤ１の先端部２′
が溶断直後の鋭利な形状をほぼ維持したまま溶接を終了
するように設定されている。As shown in the figure, at the beginning of time t8, the welding wire 1 comes into short-circuit contact (fusion) with the base material 4, and resistance heating begins. The welding wire 1 heated by resistance heating is deformed as shown by ■ and @ due to the inertia of the wire feeding motor, and is fused at ■ due to the rise in the welding machine output voltage after t8 hours. Wire fusing is
Due to the resistance heating and pressure deformation of the wire described above, deformation occurs at the middle portion of the wire protrusion as shown in the figure. At time t4 after the wire is fused, the remaining wire 6 on the base metal side is arced through an arc 7.
The tip part 2' of the welding wire 1 is melted into the base material 4 by
The setting is such that the welding is completed while almost maintaining the sharp shape immediately after fusing.
このようにして溶断によって形成された溶接終了時のワ
イヤ先端部２′にはスラグが残留しないため、次の溶接
開始時にスラグによりワイヤ、母材間の通電が阻害され
ることがない。また、ワイヤ先端部形状が鋭利なため、
溶接ワイヤが母料に接触した瞬間の接触抵抗が従来の球
形先端部に比べて大きくなり、その結果、ワイヤ先端部
のみで加熱、溶断が行なわれ、はとんどの場合、アーク
切しヤバーンパックを起こすことなく、定常アーク実験
例を示すと、定格電流３５０ＡのＣＯ２アーク溶接機に
おいて、Ｖｏ ” １．００％、Ｖ１＝２５％、Ｖ２＝
３５％、ｔＢ ＝ １．２０ ｍｓ、ｔ４−２ ｍｓに
設定し、第４図ノシーケンスで制御することにより、従
来加〜６０％程度であった再溶接時の瞬時アークスター
ト率を溶接条件の全範囲にわたり９０％以上とすること
ができた。使用ワイヤの材質は軟鋼、ワイヤ径は１．２
ｍｍである。Since no slag remains at the wire tip 2' formed by fusing in this manner at the end of welding, the slag does not impede current flow between the wire and the base metal at the start of the next welding. In addition, because the wire tip shape is sharp,
The contact resistance at the moment when the welding wire contacts the base material is greater than that of a conventional spherical tip, and as a result, heating and fusing occur only at the wire tip, which in most cases causes arc cutting. To show an example of a steady arc experiment without causing a pack, in a CO2 arc welding machine with a rated current of 350A, Vo '' 1.00%, V1 = 25%, V2 =
35%, tB = 1.20 ms, and t4-2 ms, and controlled by the sequence shown in Figure 4, the instantaneous arc start rate during rewelding, which was conventionally about 60%, can be reduced to the welding conditions. It was possible to achieve 90% or more over the entire range. The material of the wire used is mild steel, the wire diameter is 1.2
It is mm.
本発明を実施するための装置としては、たとえば第６図
に示すようにバイアスＶ。を与える出力電圧設定器８、
バイアス■□を与える出力電圧設定器９、バイアスｖ２
を与える出力電圧設定器１０を一定比率で連動させ、ｔ
８時間を設定したシーケンスタイマ（図示せず）で接点
１１．１２．１３を順次切換えることにより出力電圧制
御バイアスを■ｏ→ｖ１→ＶＱと切換え、その後、別に
設けたアーク検出回路の検出信号によりｔ４時間を設定
したシーケンスタイマ（図示せず）を作動させて電圧印
加を停止するような構成でよく、制御シーケンスの若干
の変更によって容易に実現できる。As an apparatus for carrying out the present invention, for example, a bias voltage V as shown in FIG. an output voltage setter 8 that gives
Output voltage setter 9 that provides bias ■□, bias v2
The output voltage setter 10 that gives t
By sequentially switching contacts 11, 12, and 13 using a sequence timer (not shown) set for 8 hours, the output voltage control bias is switched from o → v1 → VQ, and then the output voltage control bias is switched from o to v1 to VQ using a detection signal from a separately provided arc detection circuit. A configuration may be used in which a sequence timer (not shown) with a set time t4 is activated to stop the voltage application, and this can be easily realized by slightly changing the control sequence.
第７図、第８図は本発明の他の実施例を示す。7 and 8 show other embodiments of the present invention.
第４図では溶接停止信号が発生した瞬間より出力電圧な
り１に下げているが、ワイヤ送給モータの慣性が大きい
場合には、第７図に示すように溶接停止信号が発生して
も出力電圧制御バイアスをただちにＶｌに切換えずに、
ワイヤ送給モータの再起電圧がある一定値ｖ８に下がる
までは出力電圧制御バイアスを漸減させる〔第７図（Ｆ
ｉ）のイ′〕か、または定常バイアスＶ。より少し低目
の値〔第７図（Ｅ）の口！〕にしておき、ワイヤ送給モ
ータの再起電圧が一定値Ｖ８に達したことを検知して、
それ以降第４図と同様な制御を行なえば、溶接終了時、
ワイヤ送給モータの慣性により溶接ワイヤが母材に融着
したまま終るワイヤスティック現象を生じることもない
。In Figure 4, the output voltage is lowered to 1 from the moment the welding stop signal is generated, but if the inertia of the wire feed motor is large, the output voltage will be reduced even if the welding stop signal is generated, as shown in Figure 7. Without immediately switching the voltage control bias to Vl,
The output voltage control bias is gradually decreased until the restart voltage of the wire feed motor falls to a certain constant value v8 [Figure 7 (F
i) or steady bias V. A slightly lower value [the mouth in Figure 7 (E)! ], detect that the restart voltage of the wire feed motor has reached a certain value V8,
From then on, if the same control as shown in Fig. 4 is performed, at the end of welding,
A wire stick phenomenon in which the welding wire remains fused to the base metal due to the inertia of the wire feed motor does not occur.
また第８図において、ｔ６で示す所定時間内に溶接ワイ
ヤが溶断しない場合は、いったん電圧印加を停止し、ｔ
６で示す若干のオフタイムを経た後、再度電圧を印加す
ることにより、容易に溶断させることかできる。In addition, in FIG. 8, if the welding wire does not melt within a predetermined time indicated by t6, the voltage application is temporarily stopped and t
After a slight off-time indicated by 6, the voltage can be applied again to easily melt the wire.
〔発明の効果〕 本発明によれば、溶接終了時の溶接ワ
イヤの先端部がスラグの残留しない鋭利な形状になるた
め、溶接終了時のワイヤ先端部形状のままで次の溶接開
始時に円滑なアークスタートができ、従来に比べ瞬時ア
ークスタート率を著しく向上させることができる。[Effects of the Invention] According to the present invention, the tip of the welding wire at the end of welding has a sharp shape with no residual slag, so that the tip of the welding wire remains in the shape at the end of welding and is smooth when starting the next welding. Arc start is possible, and the instantaneous arc start rate can be significantly improved compared to conventional methods.
さらに副次効果として、従来に比ベアージスタート時の
スパッタ発生量が激減し、またバーンバックにより溶接
ワイヤがノズルチップに融着したり、その結果、コンジ
ントチューブ内でワイヤが座屈を起こす等のワイヤ送給
系統の故障発生を防止することもできる。Furthermore, as a side effect, the amount of spatter generated during bare age starts is drastically reduced compared to conventional methods, and burnback causes the welding wire to fuse to the nozzle tip, resulting in buckling of the wire within the conduit tube. It is also possible to prevent failures in the wire feeding system.
第１図は従来技術による溶接終了時の制御シーケンスの
一例を示す図、第２図は第１図のシーケンスにより得ら
れた溶接終了時のワイヤ先端部を示す図、第３図はワイ
ヤ先端部にスラグが残っている場合の溶接開始時の溶接
ワイヤの動きを示す図、第４図は本発明の一実施例にお
ける溶接終了時の制御シーケンスを示す図、第５図は第
４図のシーケンスによる溶接終了時の溶接電圧の推移と
ワイヤ先端部形成の模様を示す図、第６図は本発明を実
施するだめの装置の構成例を示す回路図、第７図、第８
図は本発明の他の実施例における溶接終了時の制御シー
ケンスを示す図である。
１：溶接ワイヤ、２．２’：ワイヤ先端部、４：母材、
ｔ８：溶接停止後、溶接機出力電圧を下げワイヤ、母材
間を短絡させている時間、ｔ４：ワイヤ溶断後、電圧印
加を停止するまでの時間
代理人弁理士 中 村 純之助
、１１ ・
倉 １ 図
矛３図
く のFig. 1 is a diagram showing an example of a control sequence at the end of welding according to the prior art, Fig. 2 is a diagram showing the wire tip at the end of welding obtained by the sequence of Fig. 1, and Fig. 3 is a diagram showing the wire tip. Fig. 4 is a diagram showing the control sequence at the end of welding in an embodiment of the present invention, and Fig. 5 is the sequence of Fig. 4. Fig. 6 is a circuit diagram showing an example of the configuration of a device for carrying out the present invention, Figs.
The figure is a diagram showing a control sequence at the end of welding in another embodiment of the present invention. 1: Welding wire, 2.2': Wire tip, 4: Base metal,
t8: After welding is stopped, the welding machine output voltage is lowered and the wire and base metal are short-circuited. t4: After the wire is fused, the time until voltage application is stopped. Attorney: Junnosuke Nakamura, 11/Kura 1 Picture spear 3 pictures
Claims (1)
アーク溶接機において、溶接停止後に溶接機出力電圧を
下げて所定時間溶接ワイヤを母材に接触短絡させた状態
で抵抗加熱する段階と、その後、溶接機出力電圧を上げ
て溶接ワイヤを溶断させる段階と、溶断後のアーク発生
を検知してほぼ瞬間的に電圧印加を停止する段階とを含
み、溶接終了時の溶接ワイヤの先端部形状が鋭利となる
ように制御することを特徴とする溶接機制御法。In an automatic or semi-automatic arc welding machine that uses a welding wire as a consumable electrode, after welding is stopped, the welding machine output voltage is lowered and the welding wire is short-circuited to the base metal for a predetermined period of time, and resistance heating is performed, and then the welding machine The process includes a stage in which the output voltage is increased to melt the welding wire, and a stage in which arc generation is detected after the melting and the voltage application is almost instantaneously stopped, resulting in a sharp tip of the welding wire at the end of welding. A welding machine control method characterized by controlling the welding machine as follows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16840083A JPS6061174A (en) | 1983-09-14 | 1983-09-14 | Method for controlling welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16840083A JPS6061174A (en) | 1983-09-14 | 1983-09-14 | Method for controlling welding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6061174A true JPS6061174A (en) | 1985-04-08 |
| JPH0254189B2 JPH0254189B2 (en) | 1990-11-20 |
Family
ID=15867411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16840083A Granted JPS6061174A (en) | 1983-09-14 | 1983-09-14 | Method for controlling welding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6061174A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60102276A (en) * | 1983-11-09 | 1985-06-06 | Hitachi Seiko Ltd | Arc welding machine |
| JP2005074492A (en) * | 2003-09-02 | 2005-03-24 | Yaskawa Electric Corp | Automatic arc welding apparatus |
| EP2313229B1 (en) * | 2008-07-30 | 2020-09-09 | Fronius International GmbH | Method and device for forming the welding wire end |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5253748A (en) * | 1975-10-30 | 1977-04-30 | Osaka Transformer Co Ltd | Consumable electrode type arc welding process |
-
1983
- 1983-09-14 JP JP16840083A patent/JPS6061174A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5253748A (en) * | 1975-10-30 | 1977-04-30 | Osaka Transformer Co Ltd | Consumable electrode type arc welding process |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60102276A (en) * | 1983-11-09 | 1985-06-06 | Hitachi Seiko Ltd | Arc welding machine |
| JP2005074492A (en) * | 2003-09-02 | 2005-03-24 | Yaskawa Electric Corp | Automatic arc welding apparatus |
| EP2313229B1 (en) * | 2008-07-30 | 2020-09-09 | Fronius International GmbH | Method and device for forming the welding wire end |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0254189B2 (en) | 1990-11-20 |
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