JPH0359785B2 - - Google Patents
Info
- Publication number
- JPH0359785B2 JPH0359785B2 JP11100584A JP11100584A JPH0359785B2 JP H0359785 B2 JPH0359785 B2 JP H0359785B2 JP 11100584 A JP11100584 A JP 11100584A JP 11100584 A JP11100584 A JP 11100584A JP H0359785 B2 JPH0359785 B2 JP H0359785B2
- Authority
- JP
- Japan
- Prior art keywords
- arc
- narrow gap
- filler
- wire
- welding
- 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
Links
- 239000000945 filler Substances 0.000 claims description 45
- 238000003466 welding Methods 0.000 claims description 32
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 15
- 229910052721 tungsten Inorganic materials 0.000 claims description 15
- 239000010937 tungsten Substances 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 description 11
- 239000002184 metal Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
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
- B23K9/08—Arrangements or circuits for magnetic control of the arc
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Arc Welding Control (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はTIG溶接装置に係り、特に狭開先内の
溶接に好適なTIG溶接装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a TIG welding device, and particularly to a TIG welding device suitable for welding within a narrow gap.
アーク溶接の一つとしてタングステン等の非消
耗電極を用い、かつ溶接部の周囲をアルゴン、ヘ
リウム等の不活性（イナート）ガスでシールする
TIG溶接がある。
As a type of arc welding, a non-consumable electrode such as tungsten is used, and the area around the weld is sealed with inert gas such as argon or helium.
There is TIG welding.
従来のTIG溶接は溶加ワイヤの溶融速度が遅
く、溶着金属量が少ないことから溶接作業の作業
能率が悪く、このためにTIG溶接を適用できる範
囲は比較的薄板同志の溶接に限られていた。 Conventional TIG welding has low welding efficiency due to the slow melting rate of the filler wire and the small amount of deposited metal, and for this reason, TIG welding is relatively limited to welding thin plates together. .
しかしながら、この溶加ワイヤに通電して溶加
ワイヤ自体を加熱して溶着金属量を増やす、いわ
ゆるホツトワイヤTIG溶接の出現によつて、溶加
ワイヤからの溶着金属量が増えることから溶接作
業の能率が向上し、これに伴つてTIG溶接の適用
範囲は厚板同志の溶接にまで拡大しつつある。 However, with the advent of so-called hot wire TIG welding, which increases the amount of weld metal by applying electricity to the filler wire and heating the filler wire itself, the amount of weld metal from the filler wire increases, which improves the efficiency of welding work. With this improvement, the scope of application of TIG welding is expanding to include welding thick plates together.
一方、厚板同志の溶接においては、溶接する断
面積を減少させて更に溶接作業の作業能率の向上
を計るために狭開先TIG溶接が実用化されてい
る。 On the other hand, when welding thick plates together, narrow gap TIG welding has been put into practical use in order to reduce the cross-sectional area to be welded and further improve the efficiency of welding work.
ところが、この狭開先TIG溶接においては次の
様な欠点がある。 However, this narrow gap TIG welding has the following drawbacks.
すなわち、開先幅が非常に狭くこの開先幅が７
mmより広くなると狭開先のほぼ中央に形成された
ままのアークによつて狭開先の側壁面を安定して
溶融（濡れ性）することが困難となり、一層の溶
接を−パスで溶接しようとすれば何らかの方法で
アークを狭開先内でオツシレイトさせる必要があ
る。 In other words, the groove width is very narrow and this groove width is 7.
If it is wider than mm, it becomes difficult to stably melt (wet) the side wall surface of the narrow groove due to the arc that remains formed almost in the center of the narrow groove, so it is necessary to weld one layer in one pass. If this is the case, it is necessary to oscillate the arc within the narrow gap in some way.
例えば、通常のアーク溶接と同様に、TIG溶接
においても開先の側壁面を溶融させるために、溶
接トーチ（電極）を機械的にオツシレイトさせる
か、あるいはアーク発生部に外部から磁界をかけ
てアークを磁気オツシレイトさせることが一般に
行なわれている。 For example, similar to normal arc welding, in TIG welding, in order to melt the sidewall surface of the groove, the welding torch (electrode) is mechanically oscillated, or an external magnetic field is applied to the arc generating part to create an arc. It is common practice to magnetically oscillate.
ところが、例えば幅５mmの平板状に形成した狭
開先TIG用トーチ（電極）を幅９mmの深い狭開先
内で機械的に左、右に２mm程度振幅させてオツシ
レイトさせようとしても、開先幅が狭く被溶接物
が邪魔になつてアークが真下を向いたままで狭開
先内を左、右に移動する形となるので、オツシレ
イト制御の困難さのわりには狭開先の側壁面が溶
融（濡れ性）できず、溶接欠陥の発生原因ともな
る。 However, even if you try to oscillate a narrow gap TIG torch (electrode) formed into a flat plate with a width of 5 mm by mechanically swinging it to the left and right by about 2 mm inside a deep narrow groove with a width of 9 mm, the groove will not open. The width is narrow and the welded object gets in the way, causing the arc to move left and right within the narrow gap while pointing straight down, so although it is difficult to control the oscillation rate, the side walls of the narrow gap are melted. (wettability) and may cause welding defects.
そこで、溶接トーチ、すなわちタングステン電
極を狭開先のほぼ中央に保持したままでアークに
外部から磁界をかけて磁気オツシレイトさせる方
が、アークはより適確に狭開先の側壁面を溶融す
ることが期待できる。 Therefore, it is better to apply a magnetic field to the arc from the outside while holding the welding torch, i.e., the tungsten electrode, approximately in the center of the narrow gap to generate magnetic oscillation, so that the arc can more accurately melt the side wall surface of the narrow gap. can be expected.
また、従来から磁気オツシレイトとしてはアー
ク発生部近くに励磁コイルを設置し、交番電流を
通電して交番磁界を発生させる方法が開発されて
いるが、直径30〜50mmの励磁コイルを９mm幅の狭
開先内に設置することは不可能である。 In addition, conventional magnetic oscillation methods have been developed in which an excitation coil is installed near the arc generating part and an alternating current is passed through it to generate an alternating magnetic field. Installation within a groove is not possible.
本発明はかかる従来の欠点を解消しようとする
もので、その目的とするところは、狭開先内でア
ークを狭開先の幅方向にオツシレイトすることが
でき、しかも狭開先TIG溶接部の健全性に大きく
影響する狭開先の側壁面への安定した溶融ができ
る狭開先TIG溶接装置を得ようとするものであ
る。
The present invention aims to eliminate such conventional drawbacks, and its purpose is to be able to oscillate the arc in the width direction of the narrow gap, and to be able to oscillate the arc in the width direction of the narrow gap TIG weld. The objective is to obtain a narrow gap TIG welding device that can stably melt the side wall surface of a narrow gap, which greatly affects the soundness.
本発明は前述の目的を達成するために、狭開先
の両側壁面に溶加ワイヤを配置し、この溶加ワイ
ヤに直流電流を交互に通電してアークを狭開先内
の幅方向に偏向させるようにしたものである。
In order to achieve the above-mentioned object, the present invention arranges filler wires on both side walls of a narrow gap, and alternately applies direct current to the filler wires to deflect an arc in the width direction within the narrow gap. It was designed so that
以下本発明の実施例を図面を用いて説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明の狭開先TIG溶接装置の側面
図、第２図は第１図の断面図、第３図は第１図に
おけるアークの偏向状態を説明する平面図、第４
図ａ，ｂ，ｃはタングステン電極、溶加ワイヤへ
の電流波形を示す図、第５図は第３図の他の実施
例を示す平面図、第６図ａ，ｂ，ｃは第５図の実
施例におけるタングステン電極、溶加ワイヤへの
電流波形を示す図である。 FIG. 1 is a side view of the narrow gap TIG welding apparatus of the present invention, FIG. 2 is a sectional view of FIG. 1, FIG. 3 is a plan view illustrating the arc deflection state in FIG. 1, and FIG.
Figures a, b, and c are diagrams showing current waveforms to the tungsten electrode and filler wire, Figure 5 is a plan view showing another embodiment of Figure 3, and Figure 6 a, b, and c are Figure 5. FIG. 3 is a diagram showing current waveforms to a tungsten electrode and a filler wire in Example.
第１図から第３図、第５図において、１，２は
被溶接物、３は被溶接物１，２に穿設された狭開
先、４は図示していない電極支持板に取付けられ
たタングステン電極、５は被溶接物１，２とタン
グステン電極４の間に発生するアーク、６はアー
ク５によつて溶融された溶融池、７は溶融池６が
凝固して形成された溶融金属、８，９はタングス
テン電極４の前方から溶融池６へ図示していない
送給ローラからガイドチツプ及びコンタクトチツ
プを介して送給される溶加ワイヤで、狭開先２の
両側壁面１０，１１に左、右二本の溶加ワイヤ
８，９送給されている。 In Figures 1 to 3 and 5, 1 and 2 are objects to be welded, 3 is a narrow gap drilled in the objects to be welded 1 and 2, and 4 is an electrode that is attached to an electrode support plate (not shown). 5 is an arc generated between the objects 1 and 2 to be welded and the tungsten electrode 4, 6 is a molten pool melted by the arc 5, and 7 is molten metal formed by solidification of the molten pool 6. , 8 and 9 are filler wires that are fed from the front of the tungsten electrode 4 to the molten pool 6 from a feed roller (not shown) via a guide tip and a contact tip, and are fed to both side wall surfaces 10 and 11 of the narrow gap 2. Two filler wires 8 and 9 on the left and right are being fed.
一般に狭開先TIG溶接は直流正極性が用いら
れ、被溶接物１，２を陽極、タングステン電極４
を陰極、一方溶加ワイヤ８，９への直流電流につ
いては溶加ワイヤ８，９を陽極、被溶接物１，２
を陰極としている。 Generally, narrow gap TIG welding uses direct current positive polarity, with the objects 1 and 2 to be welded as the anode, and the tungsten electrode 4 as the anode.
is the cathode, while for direct current to the filler wires 8, 9, the filler wires 8, 9 are the anode, and the objects 1, 2 to be welded are
is used as the cathode.
すなわち、タングステン電極４に流れるアーク
電流と、溶加ワイヤ８，９に流れるワイヤ電流は
同一方向へ流れ、アーク５は溶加ワイヤ８，９へ
のワイヤ電流によつて発生する磁界によつて吸引
され、溶加ワイヤ８，９側へ偏向し、磁気による
オツシレイトによつて狭開先３の幅方向にアーク
５を偏向させるのである。 That is, the arc current flowing through the tungsten electrode 4 and the wire current flowing through the filler wires 8 and 9 flow in the same direction, and the arc 5 is attracted by the magnetic field generated by the wire current flowing through the filler wires 8 and 9. The arc 5 is deflected toward the filler wires 8 and 9, and the arc 5 is deflected in the width direction of the narrow groove 3 by magnetic oscillation.
つまり、第３図のように、狭開先３の左側側壁
面１０側の溶加ワイヤ８にのみワイヤ電流を流す
と、タングステン電極４からのアーク５は破線で
示すように左側にオツシレイトされ、溶加ワイヤ
８への通電をやめて、溶加ワイヤ９へのみ通電す
ると、タングステン電極４からのアーク５は第３
図の一点鎖線で示すように右側側壁面１１側へ偏
向する。 In other words, as shown in FIG. 3, when a wire current is applied only to the filler wire 8 on the left side wall surface 10 of the narrow gap 3, the arc 5 from the tungsten electrode 4 is oscillated to the left as shown by the broken line. When the current is turned off to the filler wire 8 and only the filler wire 9 is turned on, the arc 5 from the tungsten electrode 4 is
It is deflected toward the right side wall surface 11 as shown by the dashed line in the figure.
第４図ａはタングステン電極４へのアーク電
流、ｂは溶加ワイヤ８へのワイヤ電流、ｃは溶加
ワイヤ９へのワイヤ電流値を示し、横軸のａ区間
は溶加ワイヤ８への通電、ｂ区間は溶加ワイヤ９
への通電を示し、溶加ワイヤ８，９へ交互に通電
するのである。 Fig. 4 a shows the arc current to the tungsten electrode 4, b shows the wire current to the filler wire 8, and c shows the wire current value to the filler wire 9. Section a on the horizontal axis shows the arc current to the filler wire 8. Energized, section b is filler wire 9
This indicates that the filler wires 8 and 9 are energized alternately.
つまり、第４図のａ区間においては第３図の左
側側壁面１０の溶加ワイヤ８のみに通電してお
り、アーク５は第３図の破線で示すように左側壁
面１０側へ偏向する。この時に図示していないが
溶融金属７も側壁面１０側に流出する現象がみら
れた。これは左側の側壁面１０の溶融に対してア
ーク５の偏向に加え溶融金属７の保有熱量が重畳
してその効果が大きくなるからである。 That is, in section a in FIG. 4, only the filler wire 8 on the left side wall surface 10 in FIG. 3 is energized, and the arc 5 is deflected toward the left side wall surface 10 as shown by the broken line in FIG. At this time, although not shown, a phenomenon in which the molten metal 7 also flowed out toward the side wall surface 10 was observed. This is because the deflection of the arc 5 and the amount of heat held by the molten metal 7 are superimposed on the melting of the left side wall surface 10, increasing the effect.
また、第４図のｂ区間においては、第３図の右
側側壁面１１の溶加ワイヤ９のみに通電してお
り、アーク５は第３図の一点鎖線で示すように右
側壁面１１側へ偏向する。このアーク５の偏向に
伴つて溶融金属７も同一方向へ流出し、右側壁面
１１側の溶融が効果的に行なわれる。 In addition, in section b in FIG. 4, only the filler wire 9 on the right side wall surface 11 in FIG. do. As the arc 5 is deflected, the molten metal 7 also flows out in the same direction, and the right side wall surface 11 is effectively melted.
なお、これらの現象に対して発明者の実験によ
れば、溶加ワイヤ８，９へのワイヤ電流値の適正
範囲が存在していた。ワイヤ電流値はアークの偏
向量（偏向角度）に大きく影響を及ぼし、通常の
アーク長において約２mm以上偏向させるにはアー
ク電流の1/2以上の値が必要である。一方、溶加
ワイヤ８，９へのワイヤ電流がアーク電流以上に
なると狭開先３幅以上に偏向し、溶接作業が困難
になる。また、溶加ワイヤ８，９への通電の周期
は数Hzから数百Hzまで開先側壁面の溶融に対して
効果が認められた。なお、数Hzから100Hz程度の
範囲においては、上記した様に溶融金属７も左右
の側壁面１０，１１の方向に振動するため、この
範囲より低周期、より高周期の場合よりも溶融金
属７の成長が断続的となり、結晶粒が小さくなる
傾向もみられた。 In addition, according to the inventor's experiments with respect to these phenomena, there is an appropriate range of the wire current value to the filler wires 8 and 9. The wire current value greatly affects the amount of arc deflection (deflection angle), and in order to deflect the arc by more than about 2 mm at a normal arc length, a value of 1/2 or more of the arc current is required. On the other hand, if the wire current to the filler wires 8 and 9 exceeds the arc current, the gap will be deflected to a narrow width of three or more, making welding work difficult. Furthermore, it was found that the period of energization to the filler wires 8 and 9 was effective for melting the groove sidewall surfaces from several Hz to several hundred Hz. In addition, in the range from several Hz to about 100 Hz, the molten metal 7 also vibrates in the direction of the left and right side wall surfaces 10 and 11 as described above, so the molten metal 7 vibrates in the direction of the left and right side wall surfaces 10 and 11, so the molten metal 7 There was also a tendency for the growth to become intermittent and the crystal grains to become smaller.
この様に、本発明の実施例においては、溶加ワ
イヤ８，９へ交互にワイヤ電流を通電することに
よつて、狭開先３の幅方向にアーク５を第３図の
破線、一点鎖線で示すように被溶接物１の左側壁
面１０、被溶接物２の右側壁面１１へオツシレイ
トできるので、側壁面１０，１１は溶融され、狭
開先TIG溶接であつても健全な溶接が行えるので
ある。 In this way, in the embodiment of the present invention, the arc 5 is formed in the width direction of the narrow gap 3 by the broken line and the dashed-dotted line in FIG. As shown in the figure, since it is possible to oscillate to the left wall surface 10 of the workpiece 1 and the right wall surface 11 of the workpiece 2, the side wall surfaces 10 and 11 are melted, and sound welding can be performed even with narrow gap TIG welding. be.
第５図および第６図のものは他の実施例を示す
もので、第１図から第４図のものと異る点は、第
１図から第４図のものにおいては溶加ワイヤ８，
９に第４図に示す如くａ区間は溶加ワイヤ８のみ
に、ｂ区間は溶加ワイヤ９のみにワイヤ電流を流
したのに対し、第５図および第６図のものにおい
ては第６図のｃ区間のように溶加ワイヤ８，９い
ずれにも通電しないｃ区間があることである。 5 and 6 show other embodiments, and the difference from the ones in FIGS. 1 to 4 is that the filler wire 8,
9, as shown in FIG. 4, the wire current was applied only to the filler wire 8 in section a, and only to the filler wire 9 in section b, whereas in the case of FIGS. There is a section c in which neither of the filler wires 8 and 9 is energized, such as section c.
つまり、溶加ワイヤ８にのみａ区間のようにワ
イヤ電流を流すと第５図の破線で示すようにアー
ク５は左側壁面１０側へ偏向し、溶加ワイヤ９に
のみｂ区間のようにワイヤ電流を流すと第５図の
一点鎖線で示すようにアーク５は右側壁面１１側
へ偏向するが、溶加ワイヤ８，９への通電をとり
やめたｃ区間においてはタングステン電極４から
のアーク５は第５図の実線で示すように狭開先３
のほぼ中央に位置する。 In other words, when a wire current is applied only to the filler wire 8 as shown in section a, the arc 5 is deflected toward the left wall surface 10 as shown by the broken line in FIG. When current is applied, the arc 5 is deflected toward the right side wall surface 11 as shown by the dashed line in FIG. Narrow gap 3 as shown by the solid line in Figure 5
located almost in the center of
この様に溶加ワイヤ８のみに通電、溶加ワイヤ
８，９への通電をやめる、溶加ワイヤ９のみに通
電、溶加ワイヤ８，９への通電をやめる操作を繰
り返すことによつてアーク５は第５図の破線の位
置、実線の位置、一点鎖線の位置、実線の位置へ
とアーク５は狭開先３の幅方向に往復移動するこ
とになり溶融池６の移動が激しくなつて溶融金属
７を一層微細化することができる。 In this way, by repeating the operations of energizing only the filler wire 8, stopping the energization to the filler wires 8 and 9, energizing only the filler wire 9, and stopping the energization to the filler wires 8 and 9, an arc can be created. 5, the arc 5 moves back and forth in the width direction of the narrow groove 3 from the position of the broken line, the position of the solid line, the position of the dashed-dot line, and the position of the solid line, and the movement of the molten pool 6 becomes intense. The molten metal 7 can be made even finer.
本発明は狭開先の両側壁面に溶加ワイヤを配置
し、この溶加ワイヤに直流電流を交互に通電して
アークを狭開先の幅方向に偏向させるようにした
ので、狭開先内であつてもアークをオツシレイト
することができ、狭開先TIG溶接部の健全性に大
きく影響する側壁面の安定した溶融（濡れ性）が
得られる。
In the present invention, filler wires are arranged on both side walls of the narrow gap, and direct current is applied alternately to the filler wires to deflect the arc in the width direction of the narrow gap. It is possible to oscillate the arc even when the welding area is low, and stable melting (wettability) of the sidewall surface, which greatly affects the integrity of narrow gap TIG welds, can be achieved.
第１図は本発明の狭開先TIG溶接装置の側面
図、第２図は第１図の断面図、第３図は第１図お
よび第２図におけるアークの偏向を説明する図、
第４図ａ，ｂ，ｃはタングステン電極と溶加ワイ
ヤへの電流波形を示した図、第５図は第３図に相
当する他の実施例によるアークの偏向を説明する
図、第６図ａ，ｂ，ｃはタングステン電極と溶加
ワイヤへの電流波形を示した図である。
２……タングステン電極、３……狭開先、８，
９……溶加ワイヤ、１０，１１……側壁面。
FIG. 1 is a side view of the narrow gap TIG welding apparatus of the present invention, FIG. 2 is a sectional view of FIG. 1, and FIG. 3 is a diagram illustrating arc deflection in FIGS. 1 and 2.
Figures 4a, b, and c are diagrams showing current waveforms to the tungsten electrode and filler wire, Figure 5 is a diagram illustrating arc deflection according to another embodiment corresponding to Figure 3, and Figure 6. Figures a, b, and c are diagrams showing current waveforms to the tungsten electrode and the filler wire. 2...Tungsten electrode, 3...Narrow gap, 8,
9... Filler wire, 10, 11... Side wall surface.
Claims (1)
配置してTIG溶接を行なうものにおいて、前記狭
開先の両側壁面に溶加ワイヤを配置し、この溶加
ワイヤに直流電流を交互通電してアークを狭開先
の幅方向に偏向させるようにしたことを特徴とす
る狭開先TIG溶接装置。1 In the case where TIG welding is performed by placing a tungsten electrode and filler wire in a narrow gap, filler wires are placed on both side walls of the narrow gap, and direct current is alternately applied to the filler wires. A narrow gap TIG welding device characterized by deflecting the arc in the width direction of the narrow gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11100584A JPS60255275A (en) | 1984-06-01 | 1984-06-01 | Narrow groove tig welding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11100584A JPS60255275A (en) | 1984-06-01 | 1984-06-01 | Narrow groove tig welding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60255275A JPS60255275A (en) | 1985-12-16 |
| JPH0359785B2 true JPH0359785B2 (en) | 1991-09-11 |
Family
ID=14549986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11100584A Granted JPS60255275A (en) | 1984-06-01 | 1984-06-01 | Narrow groove tig welding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60255275A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62263868A (en) * | 1986-05-12 | 1987-11-16 | Mitsubishi Heavy Ind Ltd | Narrow gap tig welding method |
| CN104227181B (en) * | 2013-06-24 | 2017-08-25 | 北京工业大学 | The welding method that double wire feed assistant electric arc driving main arcs are swung |
-
1984
- 1984-06-01 JP JP11100584A patent/JPS60255275A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60255275A (en) | 1985-12-16 |
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