JPH05220576A - Nozzle angle variable type welding torch - Google Patents

Nozzle angle variable type welding torch

Info

Publication number
JPH05220576A
JPH05220576A JP6137692A JP6137692A JPH05220576A JP H05220576 A JPH05220576 A JP H05220576A JP 6137692 A JP6137692 A JP 6137692A JP 6137692 A JP6137692 A JP 6137692A JP H05220576 A JPH05220576 A JP H05220576A
Authority
JP
Japan
Prior art keywords
nozzle
torch
main body
fixed
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.)
Withdrawn
Application number
JP6137692A
Other languages
Japanese (ja)
Inventor
Hiroshi Tachikawa
博 立川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP6137692A priority Critical patent/JPH05220576A/en
Publication of JPH05220576A publication Critical patent/JPH05220576A/en
Withdrawn legal-status Critical Current

Links

Landscapes

  • Arc Welding In General (AREA)

Abstract

PURPOSE:To carry out angle displacement of a shielding gas nozzle with respect to the axial center when it comes into contact with fixed material to carry out relief and to prevent breakdown and malfunction of equipment material by arranging a spherical joint and an elastic member on a joining part between a torch main body and the nozzle. CONSTITUTION:A fixed side member 3a of the spherical joint 3 is fitted and fixed on the tip 1a of the torch main body 1 and in the same way, a movable side member 3b is screwed and fixed into the base end part inside of the nozzle 2. In addition, the elastic member 4 (waveform ring made of spring material, for instance) is fitted idly on the tip 1a of the torch main body 1 and the elastic pressure is worked between the stepped shoulder surface 1b of the torch main body and the base end part end face 2a of the nozzle 2. Consequently, the nozzle 2 is tiltable and besides, returned and energized for the axial center of the torch main body 1.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、トーチ本体の軸芯に対
するノズル角度が自在に変わるノズル角度可変型溶接ト
ーチに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable nozzle angle welding torch in which the nozzle angle with respect to the axis of the torch body can be freely changed.

【0002】[0002]

【従来の技術】ミグ溶接法は、トーチ本体のワイヤ通路
から消耗電極ワイヤを送給し、トーチ本体の先端部の電
極チップで給電し、ワイヤと母材間で発生させたアーク
によって、溶融プールの形成と溶接ビードの形成を行な
うものであるが、良質の溶接金属を得るために、トーチ
本体の先端部を円筒形ノズルで包囲し、アルゴンなどの
シールドガスをトーチ本体のガス通路からノズル内部に
送り込むことによって、溶接部を周囲の大気より保護し
ている。電極ワイヤを中心とする一定広さの空間領域に
必要十分な密度でシールドガスを均一に分布させるため
に、ノズルは先端口径を一定以上に設定され、軸芯をト
ーチ本体の軸芯に一致させて配置されている。
2. Description of the Related Art The MIG welding method feeds a consumable electrode wire from a wire passage of a torch body, feeds it with an electrode tip at the tip of the torch body, and uses an arc generated between the wire and the base material to melt a molten pool. In order to obtain good quality weld metal, the tip of the torch body is surrounded by a cylindrical nozzle, and a shield gas such as argon is supplied from the gas passage of the torch body to the inside of the nozzle. To protect the weld from the surrounding atmosphere. In order to evenly distribute the shielding gas with a required and sufficient density in a space area of a certain size centered on the electrode wire, the nozzle has a tip diameter set to a certain value or more, and the shaft core is aligned with the shaft core of the torch body. Are arranged.

【0003】このように電極ワイヤの外側に大径に張り
出して同心配置されたノズルは、建築物の柱−梁接合部
等のような狭い開先においては、溶接トーチの周囲に残
される余裕空間を狭くするものであり、ウィビング動作
時にノズルが柱や壁等の固定物に接触し易くなる。
In this way, the nozzle, which is concentrically arranged so as to project to the outside of the electrode wire with a large diameter, has a margin space left around the welding torch in a narrow groove such as a column-beam joint of a building. Since the nozzle is narrowed, the nozzle easily comes into contact with a fixed object such as a pillar or a wall during the weaving operation.

【0004】金属やセラミックス等の固い材料で作製さ
れ、トーチ本体に一体的に固着されたノズルが固定物に
当たると、安全確保のための緊急停止回路を作動させる
圧力信号が検出されて、自動溶接機の運転が無意図的に
停止されたりして、誤動作の原因となる。また、ノズル
と固定物の接触による衝撃力は溶接トーチまたは溶接機
本体に対し破壊力として作用することになり、破損した
溶接トーチ等の修理交換のために、その都度溶接作業が
中断されることになった。
When a nozzle made of a hard material such as metal or ceramics and integrally fixed to the torch body hits a fixed object, a pressure signal for activating an emergency stop circuit for ensuring safety is detected and automatic welding is performed. Operation of the machine may be stopped unintentionally, causing malfunction. Also, the impact force due to the contact between the nozzle and the fixed object acts on the welding torch or the welding machine body as a destructive force, and the welding work is interrupted each time for repairing or replacing the damaged welding torch. Became.

【0005】破損や誤動作、溶接中断を未然に防止する
ために、布製の可撓性ノズルの採用が提案されている。
このノズルは、固定物に押し付けられた時に変形を開始
し、固定物に接近するにつれて変形量を増加させること
によって、ノズルと固定物の接触による衝撃力を吸収す
るようにしたものであるが、実際においては、過熱され
たり、スパッタが付着したときには、復元性が大幅に低
下または喪失してしまい、元の円筒形状を回復して軸芯
がトーチ本体の軸芯に一致した正規位置に戻らなくなる
欠点があった。
In order to prevent breakage, malfunction and welding interruption, it has been proposed to use a flexible cloth nozzle.
This nozzle starts to deform when pressed against a fixed object, and increases the amount of deformation as it approaches the fixed object to absorb the impact force due to the contact between the nozzle and the fixed object. In reality, when overheated or spatter adheres, the recoverability is greatly reduced or lost, the original cylindrical shape is restored and the axis does not return to the normal position that matches the axis of the torch body. There was a flaw.

【0006】また、狭隘部における溶接トーチの移動自
由度を大きくするために、ノズルの先端部を極端に細め
ることも提案されている。しかしながら、小口径のノズ
ルでは、シールドガスで遮蔽可能な領域が狭いものとな
ってシールド不良を起こす恐れがあり、溶接速度によっ
ては溶融プールを充分にカバーできないことになり、良
質の溶接を能率良く行なう点では問題がある。
Further, in order to increase the freedom of movement of the welding torch in a narrow space, it has been proposed to make the tip of the nozzle extremely thin. However, with a small diameter nozzle, the area that can be shielded by the shielding gas is narrow, and there is a risk of shield failure, and it may not be possible to sufficiently cover the molten pool depending on the welding speed. There is a problem in doing it.

【0007】[0007]

【発明が解決しようとする課題】したがって本発明の目
的は、ノズルと固定物の接触による衝撃力を的確に吸収
することができるため、溶接トーチまたは溶接機の破損
や誤動作、溶接中断を招くことなく、良質の溶接を能率
良く行なえるノズル角度可変型溶接トーチを提供するこ
とである。
SUMMARY OF THE INVENTION Therefore, an object of the present invention is to accurately absorb the impact force caused by the contact between a nozzle and a fixed object, which causes damage or malfunction of the welding torch or welding machine, or interruption of welding. Nozzle angle variable welding torch that can efficiently perform high quality welding.

【0008】[0008]

【課題を解決するための手段】以下、添付図面中の参照
符号を用いて説明すると、本発明の溶接トーチでは、ノ
ズル2を球面継手3でトーチ本体1に回動自在に連結
し、ノズル2の軸芯がトーチ本体1の軸芯に対して角度
変位した逃げ位置から、ノズル2の軸芯がトーチ本体1
の軸芯に一致した正規位置に向けてノズル2を復帰付勢
する弾性部材4を、ノズル2とトーチ本体1の間に設け
る。
In the welding torch of the present invention, the nozzle 2 is rotatably connected to the torch body 1 by means of a spherical joint 3, and the nozzle 2 is described below. From the escape position where the axis of the nozzle is angularly displaced with respect to the axis of the torch body 1, the axis of the nozzle 2 becomes the torch body 1.
An elastic member 4 is provided between the nozzle 2 and the torch body 1 for urging the nozzle 2 to return toward a normal position that coincides with the axis of the.

【0009】[0009]

【作用】この溶接トーチを自動溶接機に装着し、図2に
示すように柱−梁接合部の狭い開先5に適用した場合に
おいて、ウィビング動作中に溶接トーチの移動制御の誤
差等によってノズル2の先端部が固定物、即ち柱6の側
壁面6aまたは梁7の端壁面7aに接触すると、ノズル
2は球面継手3を中心に円滑に回動して、図3に示した
ようにノズル2の軸芯がトーチ本体1の軸芯に対して角
度変位した逃げ位置に来る。
When this welding torch is mounted on an automatic welding machine and is applied to the groove 5 having a narrow column-beam joint as shown in FIG. 2, the nozzle is moved by an error in the movement control of the welding torch during the weaving operation. When the tip end of 2 contacts the fixed object, that is, the side wall surface 6a of the column 6 or the end wall surface 7a of the beam 7, the nozzle 2 smoothly rotates about the spherical joint 3, and as shown in FIG. The shaft center of 2 comes to the escape position where the shaft center of the torch body 1 is angularly displaced.

【0010】この逃げ回動の過程において、ノズル2と
固定物の接触による衝撃力は、ノズル2とトーチ本体1
の間で弾性部材4が弾性変形することによって的確に吸
収されるため、溶接トーチや溶接機本体に破壊力として
作用することがない。また、自動溶接機の緊急停止回路
を作動させるような圧力信号を検出させることがないの
で、自動溶接機の誤動作や運転中断がない。
In the process of this escape rotation, the impact force due to the contact between the nozzle 2 and the fixed object is the nozzle 2 and the torch body 1.
Since the elastic member 4 is elastically deformed between them and is accurately absorbed, it does not act as a destructive force on the welding torch or the welding machine body. Further, since the pressure signal for activating the emergency stop circuit of the automatic welding machine is not detected, there is no malfunction of the automatic welding machine or interruption of operation.

【0011】自動溶接機の運転プログラムに従って溶接
トーチが所定の狙い位置に移動することによって、ノズ
ル2が固定物から離れると、ノズル2を介して働いてい
た固定物からの押圧力が消失するので、弾性部材4は固
有の弾性によって元の形状を回復する。そのため、弾性
部材4に付勢されたノズル2は、球面継手3を中心に復
帰回動し、図2に示したようにノズル2の軸芯がトーチ
本体1の軸芯に一致した正規位置に直ちに戻る。
When the nozzle 2 moves away from the fixed object by moving the welding torch to a predetermined target position in accordance with the operation program of the automatic welding machine, the pressing force from the fixed object acting through the nozzle 2 disappears. The elastic member 4 recovers its original shape by its inherent elasticity. Therefore, the nozzle 2 urged by the elastic member 4 is returned and rotated about the spherical joint 3, and as shown in FIG. 2, the nozzle 2 is at the normal position where the axis of the nozzle 2 coincides with the axis of the torch body 1. Return immediately.

【0012】[0012]

【実施例】図示の実施例では、トーチ本体1の丸棒状の
先端部1aの外側面には、円筒形のガス放出チップ8を
嵌め合わせ固定してあり、ガス放出チップ8にはガス通
路9の出口端が開口している。トーチ本体1の該先端部
1aの端面には、丸棒形の給電チップ10をねじ込み固
定してあり、給電チップ10の中央孔11にはワイヤ通
路12から送給される電極ワイヤ13が挿通されてい
る。球面継手3の固定側部材3aはガス放出チップ8よ
りも基端寄りの部位において、トーチ本体1の先端部1
aに嵌め合わせ固定してあり、球面継手3の可動側部材
3aは直円筒形のノズル2の基端部にねじ込み固定して
ある。
In the illustrated embodiment, a cylindrical gas discharge tip 8 is fitted and fixed to the outer surface of the round bar-shaped tip portion 1a of the torch body 1, and the gas discharge tip 8 has a gas passage 9 formed therein. The outlet end of is open. A round rod-shaped feed tip 10 is screwed and fixed to the end surface of the tip portion 1a of the torch body 1, and an electrode wire 13 fed from a wire passage 12 is inserted into a central hole 11 of the feed tip 10. ing. The fixed side member 3a of the spherical joint 3 is located at a position closer to the base end than the gas discharge tip 8 and is at the tip 1 of the torch body 1.
The movable side member 3a of the spherical joint 3 is screwed and fixed to the base end portion of the right cylindrical nozzle 2.

【0013】トーチ本体1の先端部1aの根元部には、
ノズル2の外径と合致するように拡径した段差肩面1b
を形成してある。弾性部材4はバネ材で作製された波形
リング板で構成され、円周方向に沿って連続して複数個
の波形が形成されている。トーチ本体1の先端部1aに
遊び嵌めされた弾性部材4は、ノズル2の基端部の端面
2aとトーチ本体1の段差肩面1aに各波形の波頭部4
aと波底部4bが圧接している。固定物と接触してノズ
ル2がトーチ本体1の軸芯に対して角度変位した逃げ位
置に回動するとき、弾性部材4はノズル2の端面2aに
押され、波形が潰される方向に弾性変形する。
At the base of the tip 1a of the torch body 1,
Step shoulder surface 1b enlarged to match the outer diameter of the nozzle 2
Has been formed. The elastic member 4 is composed of a corrugated ring plate made of a spring material, and a plurality of corrugations are continuously formed in the circumferential direction. The elastic member 4, which is loosely fitted to the tip portion 1a of the torch body 1, has a wave-shaped corrugated portion 4 on the end surface 2a of the base end portion of the nozzle 2 and the step shoulder surface 1a of the torch body 1.
a and the wave bottom portion 4b are in pressure contact with each other. When the nozzle 2 comes into contact with a fixed object and rotates to an escape position where it is angularly displaced with respect to the axis of the torch body 1, the elastic member 4 is pushed by the end surface 2a of the nozzle 2 and elastically deforms in the direction in which the waveform is crushed. To do.

【0014】弾性部材4は図示のものに限定されず、種
々の形態を採用することができる。例えば、弾性部材を
バネ材で編成した筒形メッシュで構成し、筒形メッシュ
の一方の端部を軸芯をノズルの軸芯に一致させてノズル
の基端部に嵌め合わせ固定し、筒形メッシュの他方の端
部を軸芯をトーチ本体の軸芯に一致させてトーチ本体の
受部に嵌め合わせ固定することもできる。
The elastic member 4 is not limited to the one shown in the figure, and various forms can be adopted. For example, the elastic member is composed of a tubular mesh knitted with a spring material, and one end of the tubular mesh is fitted and fixed to the base end portion of the nozzle with the axial center aligned with the axial center of the nozzle. The other end of the mesh may be fitted and fixed to the receiving portion of the torch body with the axis aligned with the axis of the torch body.

【0015】また、弾性部材を大径のコイルバネによっ
て構成し、コイルバネの一方の端部を軸芯をノズルの軸
芯に一致させてノズルの基端部に嵌め合わせ固定し、コ
イルバネの他方の端部を軸芯をトーチ本体の軸芯に一致
させてトーチ本体の受部に嵌め合わせ固定することもで
きる。
Further, the elastic member is constituted by a coil spring having a large diameter, and one end of the coil spring is fitted and fixed to the base end of the nozzle with its axis aligned with the axis of the nozzle, and the other end of the coil spring. The part may be fitted and fixed to the receiving part of the torch body with the axis of the part aligned with the axis of the torch body.

【0016】弾性部材を複数本の直線状バネ線で構成
し、ノズルの基端部外側面とトーチ本体の受部外側面に
相対応して複数個の縦溝を等間隔に設け、該縦溝に挿入
したバネ線の各端部をノズルの基端部とトーチ本体の受
部に締付バンド等で固定することもできる。
The elastic member is composed of a plurality of linear spring wires, and a plurality of vertical grooves are provided at equal intervals corresponding to the outer surface of the base end portion of the nozzle and the outer surface of the receiving portion of the torch body. It is also possible to fix each end of the spring wire inserted in the groove to the base end of the nozzle and the receiving part of the torch body with a tightening band or the like.

【0017】[0017]

【発明の効果】以上のように本発明の溶接トーチは、ノ
ズル2を球面継手3によってトーチ本体1に回動自在に
連結し、ノズル2とトーチ本体1の間にノズル2を復帰
付勢する弾性部材4を設けたものであり、ノズル2は固
定物と接触するとき、軸芯がトーチ本体1の軸芯に対し
て角度変位した逃げ位置に円滑に回動し、ノズル2と固
定物の接触による衝撃力が弾性部材4の弾性変形によっ
て的確に吸収されるので、溶接トーチまたは溶接機本体
の破損や誤動作、あるいは溶接中断を招くことがない。
As described above, in the welding torch of the present invention, the nozzle 2 is rotatably connected to the torch body 1 by the spherical joint 3, and the nozzle 2 is biased to return between the nozzle 2 and the torch body 1. The elastic member 4 is provided, and when the nozzle 2 comes into contact with a fixed object, the nozzle 2 smoothly rotates to an escape position in which the axis of the nozzle 2 is angularly displaced with respect to the axis of the torch body 1, and the nozzle 2 and the fixed object are rotated. Since the impact force due to the contact is accurately absorbed by the elastic deformation of the elastic member 4, the welding torch or the welding machine main body is not damaged or malfunctions, or the welding is not interrupted.

【0018】本発明の溶接トーチでは、狭隘部における
移動自由度を大きくするだけのためにノズルの先端口径
を過度に細くする必要がなく、ノズル2の先端口径を必
要十分な大きさに設定することができるため、また、弾
性部材4の付勢によってノズル2は軸芯がトーチ本体の
軸芯に一致した正規位置に常に誘導保持されているた
め、電極ワイヤ13を中心とする所要広さのシールド空
間が的確に形成維持されることになり、溶融プールの全
域を大気から有効に遮蔽することができるので、良質な
溶接を能率良く行なうことができる。
In the welding torch of the present invention, it is not necessary to make the tip diameter of the nozzle excessively small in order to increase the degree of freedom of movement in the narrow space, and the tip diameter of the nozzle 2 is set to a necessary and sufficient size. In addition, since the nozzle 2 is always guided and held at the regular position where the axis of the nozzle 2 coincides with the axis of the torch body by the urging of the elastic member 4, the nozzle 2 has a required area around the electrode wire 13. Since the shield space is appropriately formed and maintained, and the entire molten pool can be effectively shielded from the atmosphere, high-quality welding can be efficiently performed.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例に係るノズル角度可変型溶接
トーチの要部を縦断面で示した正面図である。
FIG. 1 is a front view showing a longitudinal section of a main part of a variable nozzle angle welding torch according to an embodiment of the present invention.

【図2】ノズルがトーチ本体の軸芯に一致した正規位置
に保持されている状態を示す前記溶接トーチの正面図で
ある。
FIG. 2 is a front view of the welding torch showing a state in which a nozzle is held at a regular position that coincides with an axis of a torch body.

【図3】固定物との接触によってノズルが逃げ位置に回
動した状態を示す前記溶接トーチの正面図である。
FIG. 3 is a front view of the welding torch showing a state in which the nozzle is rotated to an escape position due to contact with a fixed object.

【符号の説明】[Explanation of symbols]

1 トーチ本体 1a トーチ本体の先端部 1b トーチ本体の段差肩面 2 ノズル 2a ノズルの端面 3 溶接継手 3a 固定側部材 3b 可動側部材 4 弾性部材 4a 波頭部 4b 波底部 5 開先 6 柱 6a 柱の側壁面 7 梁 7a 梁の端壁面 8 ガス放出チップ 9 ガス通路 10 給電チップ 11 中央孔 12 ワイヤ通路 13 電極ワイヤ 1 Torch main body 1a Tip part of the torch main body 1b Stepped shoulder surface of the torch main body 2 Nozzle 2a Nozzle end surface 3 Weld joint 3a Fixed side member 3b Movable side member 4 Elastic member 4a Wave head 4b Wave bottom 5 Column 6 Column 6a Column Side wall surface 7 Beam 7a Beam end wall surface 8 Gas discharge tip 9 Gas passage 10 Power supply tip 11 Central hole 12 Wire passage 13 Electrode wire

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 ノズルを球面継手でトーチ本体に回動自
在に連結し、ノズルの軸芯がトーチ本体の軸芯に対して
角度変位した逃げ位置から、ノズルの軸芯がトーチ本体
の軸芯に一致する正規位置に向けてノズルを復帰付勢す
る弾性部材を、ノズルとトーチ本体の間に設けたノズル
角度可変型溶接トーチ。
1. A nozzle is rotatably connected to a torch body by a spherical joint, and the axis of the nozzle is located at an escape position where the axis of the nozzle is angularly displaced with respect to the axis of the torch body. A variable nozzle angle welding torch in which an elastic member for urging the nozzle to return toward a regular position corresponding to is provided between the nozzle and the torch body.
JP6137692A 1992-02-14 1992-02-14 Nozzle angle variable type welding torch Withdrawn JPH05220576A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6137692A JPH05220576A (en) 1992-02-14 1992-02-14 Nozzle angle variable type welding torch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6137692A JPH05220576A (en) 1992-02-14 1992-02-14 Nozzle angle variable type welding torch

Publications (1)

Publication Number Publication Date
JPH05220576A true JPH05220576A (en) 1993-08-31

Family

ID=13169402

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6137692A Withdrawn JPH05220576A (en) 1992-02-14 1992-02-14 Nozzle angle variable type welding torch

Country Status (1)

Country Link
JP (1) JPH05220576A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09248675A (en) * 1996-01-12 1997-09-22 Mitsubishi Heavy Ind Ltd Torch for gas shielded metal-arc welding
EP3650160A1 (en) * 2018-11-08 2020-05-13 Commissariat à l'énergie atomique et aux énergies alternatives Head for welding and/or cutting and device for welding and/or cutting comprising such a head

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09248675A (en) * 1996-01-12 1997-09-22 Mitsubishi Heavy Ind Ltd Torch for gas shielded metal-arc welding
EP3650160A1 (en) * 2018-11-08 2020-05-13 Commissariat à l'énergie atomique et aux énergies alternatives Head for welding and/or cutting and device for welding and/or cutting comprising such a head
FR3088227A1 (en) * 2018-11-08 2020-05-15 Commissariat A L'energie Atomique Et Aux Energies Alternatives WELDING AND / OR CUTTING HEAD AND WELDING AND / OR CUTTING DEVICE COMPRISING SUCH A HEAD

Similar Documents

Publication Publication Date Title
US7557327B2 (en) Method of pulse welding and contact tip therefor
JP4993770B2 (en) Consumable electrode gas shield arc welding torch and power supply tip
US11731216B2 (en) Device for working a surface of a workpiece by means of a laser beam and method for operating the device
US4047656A (en) Orbital motion welding head
JPH0227074B2 (en)
EP0802704A1 (en) Plasma torch
JPS5893580A (en) Welding torch
JPH05220576A (en) Nozzle angle variable type welding torch
JPH081326A (en) Under water working device
US6753497B1 (en) Method and apparatus for initiating welding arc using plasma flow
CA2242273A1 (en) Welding torch apparatus
JPH11197841A (en) Torch for narrow beveling welding, and narrow beveling welding method
JP2009082943A (en) Forced-pressurization power supply tip assembly and forced-pressurization power supply torch
JPH01309787A (en) Torch nozzle for gas shielded welding
JP7238221B2 (en) Arc spot welding equipment
EP4219055A1 (en) Current contact nozzle with point current transfer
JPH091346A (en) Torch for arc welding machine
JPH05298Y2 (en)
JPH037086Y2 (en)
KR930006427Y1 (en) Inner sleeve structure of electron gun cathode framework body
KR0116485Y1 (en) Protective gas preflow time control device for gas metal arc welder
JPS569073A (en) Consumable electrode type gas shielded arc welding equipment
JPH0144237Y2 (en)
JP3606178B2 (en) Plasma welding torch
KR20170054813A (en) Plasma spot welding device

Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 19990518