JP2002205171A - Welding torch - Google Patents

Welding torch

Info

Publication number
JP2002205171A
JP2002205171A JP2001001513A JP2001001513A JP2002205171A JP 2002205171 A JP2002205171 A JP 2002205171A JP 2001001513 A JP2001001513 A JP 2001001513A JP 2001001513 A JP2001001513 A JP 2001001513A JP 2002205171 A JP2002205171 A JP 2002205171A
Authority
JP
Japan
Prior art keywords
shield cover
torch
electrode
main body
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.)
Withdrawn
Application number
JP2001001513A
Other languages
Japanese (ja)
Inventor
Takashi Shige
重  隆司
Yoshiaki Fukunaga
義昭 福永
Satoru Konishi
哲 小西
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP2001001513A priority Critical patent/JP2002205171A/en
Publication of JP2002205171A publication Critical patent/JP2002205171A/en
Withdrawn legal-status Critical Current

Links

Landscapes

  • Arc Welding In General (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a welding torch with which a deep and thin groove joint can be easily welded. SOLUTION: The welding torch is characterized in that it is provided with: a rectangular cylindrical shield cover 1 with an opening 3 formed near the lower end; a rectangular post-like torch body 4 which is inserted in the center of the shield cover, and which is composed of a highly heat conductive metal with an electrode inserting hole formed near the lower part; a rectangular hollow cooling means which is brought into contact with the side face of the torch body 4, and which is arranged with a desired space apart from the inner side face of the shield cover 1, between the shield cover 1 and the torch body 4; an electrode inserted in the electrode inserting hole of the torch body 4 in a manner the lower end is protruding downward from the torch body 4; a fixing screw 8 which is screwed onto the lower side wall of the torch body 4 through the opening of the shield cover, and which is for fixing the electrode on the torch body 4; and a heat resistant adhesive tape 9 which is placed on the outer side face of the shield cover 1 including the opening for the purpose of covering the opening.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、TIG溶接装置の
溶接トーチに関し、特に狭開先への溶接に適した溶接ト
ーチに係る。
The present invention relates to a welding torch for a TIG welding device, and more particularly to a welding torch suitable for welding to a narrow groove.

【0002】[0002]

【従来の技術】TIG溶接装置は、例えば開先の溶接に
使用されている。このようなTIG溶接装置の溶接トー
チは、従来、図6および図7に示す構造のものが知られ
ている。
2. Description of the Related Art A TIG welding apparatus is used, for example, for welding a groove. Conventionally, a welding torch of such a TIG welding device has a structure shown in FIGS. 6 and 7.

【0003】すなわち、図6および図7の41は円筒状
のシールドカバーである。下端をテーパ状に縮径した円
筒状の電極支持部材42は、前記シールドカバー41内
にその外周面が前記シールドカバー41の内周面に対し
て所望の間隔をあけて同心円状に挿入されている。2つ
の電極把持金具43a,43bは、前記円筒状の電極支
持部材42内に挿入されている。これら電極把持金具4
3a,43bは、下端をテーパ状に縮径した半円柱状を
なし、かつ互いに対向する長さ方向(縦方向)に沿う平
坦な面に後述する円柱状電極が密着される小半円柱穴4
4a,44bが形成されている。中心に後述する円柱状
電極が挿入される貫通穴45を有する円柱状の押え冶具
46は、前記円筒状の電極支持部材42内に前記2つの
電極把持金具43a,43b上に位置するように挿入さ
れている。下端がテーパ状に加工された円柱状電極47
は、前記円柱状の押え冶具46および2つの電極把持金
具43a,43bの小半円柱穴44a,44bで形成さ
れる半円柱穴を通して、下端がそれら電極把持金具43
a,43bの下方に延出されている。
That is, reference numeral 41 in FIGS. 6 and 7 denotes a cylindrical shield cover. A cylindrical electrode support member 42 having a tapered lower end is inserted concentrically into the shield cover 41 with an outer peripheral surface at a desired interval from an inner peripheral surface of the shield cover 41. I have. The two electrode holding members 43a and 43b are inserted into the cylindrical electrode support member 42. These electrode holding brackets 4
Reference numerals 3a and 43b denote small semi-cylindrical holes 4 each having a semi-cylindrical shape having a tapered lower end at a lower end, and having a columnar electrode to be described later in close contact with a flat surface along the longitudinal direction (longitudinal direction) facing each other.
4a and 44b are formed. A cylindrical holding jig 46 having a through hole 45 into which a cylindrical electrode to be described later is inserted at the center is inserted into the cylindrical electrode support member 42 so as to be positioned on the two electrode holding brackets 43a and 43b. Have been. Columnar electrode 47 whose lower end is tapered
The lower end passes through the semi-cylindrical hole formed by the cylindrical holding jig 46 and the small semi-cylindrical holes 44a and 44b of the two electrode gripping fittings 43a and 43b,
a, 43b.

【0004】このような構成の溶接トーチにおいて、円
柱状の押え冶具46を下方に向けて押圧し、その下の2
つの半円柱状電極把持金具43a,43bをその外周の
円筒状電極支持部材42に沿って下降させと、それら半
円柱状電極把持金具43a,43bの小半円柱穴44
a,44b内面が前記円柱状電極47に密着するため、
前記円柱状電極47を前記半円柱状電極把持金具43
a,43bで把持、固定することができる。また、シー
ルドガスを前記シールドカバー41と前記円筒状電極支
持部材42の間の環状空間を通して前記電極47の延出
端部に噴射できるため、溶接時に電極の損傷や溶接金属
の酸化を防ぐことができる。
In a welding torch having such a configuration, a cylindrical holding jig 46 is pressed downward, and the lower holding jig 46 is pressed.
When the two semi-cylindrical electrode holding members 43a, 43b are lowered along the cylindrical electrode support member 42 on the outer periphery thereof, the small semi-cylindrical holes 44 of the semi-cylindrical electrode holding members 43a, 43b are lowered.
Since the inner surfaces of a and 44b are in close contact with the columnar electrode 47,
The cylindrical electrode 47 is connected to the semi-cylindrical electrode holding bracket 43.
a and 43b can be held and fixed. Further, since the shield gas can be injected to the extended end of the electrode 47 through the annular space between the shield cover 41 and the cylindrical electrode support member 42, damage to the electrode and oxidation of the weld metal during welding can be prevented. it can.

【0005】[0005]

【発明が解決しようとする課題】前述した図6および図
7に示す溶接トーチは、電極47を2つの半円柱状電極
把持金具43a,43bで把持、固定する構造であるた
め、断面積が大きくなって細くするには限界があった。
その結果、狭い開先の溶接を行なう場合、溶接トーチが
開先内に挿入させるためには電極47のみを長く突き出
して溶接する必要があった。しかしながら、電極47の
突き出し長さが50mmを超えると、シールドガスをそ
の電極47先端に十分に噴射、供給することが困難にな
る。このため、溶接時に電極の損傷や溶接金属の酸化が
生じるため、深い狭開先継手の溶接は実質的に不可能で
あった。
The welding torch shown in FIGS. 6 and 7 has a structure in which the electrode 47 is gripped and fixed by the two semi-cylindrical electrode grips 43a and 43b, and therefore has a large cross-sectional area. There was a limit to becoming thinner.
As a result, when welding with a narrow groove, it is necessary to protrude and weld only the electrode 47 long in order for the welding torch to be inserted into the groove. However, if the protruding length of the electrode 47 exceeds 50 mm, it becomes difficult to sufficiently inject and supply the shielding gas to the tip of the electrode 47. For this reason, the electrode is damaged and the weld metal is oxidized during welding, so that it is practically impossible to weld a deep narrow groove joint.

【0006】本発明は、深い狭開先継手を容易に溶接す
ることが可能な溶接トーチを提供しようとするものであ
る。
An object of the present invention is to provide a welding torch capable of easily welding a deep narrow groove joint.

【0007】[0007]

【課題を解決するための手段】本発明に係る溶接トーチ
は、下端付近に開口部が穿設された矩形筒状のシールド
カバーと、このシールドカバーの中心に挿入され、下部
付近に電極挿入穴が穿設された良熱伝導性金属からなる
矩形柱状のトーチ本体と、前記シールドカバーと前記ト
ーチ本体との間に前記トーチ本体の側面に接触するとと
もに、前記シールドカバーの内側面と所望の隙間をあけ
て配置された矩形中空状の冷却手段と、前記トーチ本体
の電極挿入穴に下端が前記トーチ本体から下方に突出す
るように挿入された電極と、前記シールドカバーの開口
部を通して前記トーチ本体の下部側壁に螺着され、前記
電極を前記トーチ本体に固定するための固定ねじと、前
記開口部を含む前記シールドカバーの外側面に貼着され
た前記開口部を塞ぐための耐熱性粘着テープとを具備し
たことを特徴とするものである。
A welding torch according to the present invention comprises a rectangular cylindrical shield cover having an opening formed in the vicinity of the lower end, an electrode insertion hole inserted in the center of the shield cover, and an electrode insertion hole in the vicinity of the lower part. A rectangular column-shaped torch body made of a good heat conductive metal having a hole, and a side surface of the torch body between the shield cover and the torch body, and a desired gap with an inner surface of the shield cover. A cooling means having a rectangular hollow shape arranged with a gap, an electrode inserted into the electrode insertion hole of the torch body such that a lower end thereof protrudes downward from the torch body, and the torch body through an opening of the shield cover. A fixing screw for fixing the electrode to the torch main body, the opening being attached to an outer surface of the shield cover including the opening, and being screwed to a lower side wall of the torch main body. It is characterized in that it has and a heat-resistant adhesive tape for.

【0008】本発明に係る溶接トーチにおいて、さらに
シールドガスを前記シールドカバーの下部側に向けて噴
射するための補助シールドガス噴射手段を前記シールド
カバーの外側面に上下動可能に取り付けることを許容す
る。
[0008] In the welding torch according to the present invention, an auxiliary shield gas injection means for injecting the shield gas toward the lower side of the shield cover may be attached to the outer surface of the shield cover so as to be vertically movable. .

【0009】[0009]

【発明の実施の形態】以下、本発明を図面を参照して詳
細に説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings.

【0010】図1は、本発明の溶接トーチを示す縦断面
図、図2は図1の溶接トーチのII−II線に沿う断面図、
図3は図1の要部拡大断面図である矩形筒状のシールド
カバー1は、その上部側が矩形支持板2に支持されてい
る。このシールドカバー1の幅の狭い側壁の下部付近に
は、後述する固定ねじが挿通される開口部3が穿設され
ている。
FIG. 1 is a longitudinal sectional view showing a welding torch of the present invention, FIG. 2 is a sectional view of the welding torch of FIG. 1 taken along the line II-II,
FIG. 3 is an enlarged sectional view of a main part of FIG. 1, and a rectangular cylindrical shield cover 1 is supported by a rectangular support plate 2 on the upper side. In the vicinity of the lower portion of the narrow side wall of the shield cover 1, an opening 3 through which a fixing screw described later is inserted is formed.

【0011】例えば銅のような良熱伝導性金属からなる
矩形柱状のトーチ本体4は、前記矩形筒状のシールドカ
バー1内にそのトーチ本体4の対向する幅の広い外側面
がそれぞれ前記シールドカバー1の対向する幅の広い内
側面に接触するとともに、そのトーチ本体4の対向する
幅の狭い外側面がそれぞれ前記シールドカバー1の対向
する幅の狭い内側面と所望の距離をあけるように挿入さ
れている。前記トーチ本体4は、上端が前記支持板2に
固定されている。前記トーチ本体4は、その下部付近に
電極挿入穴5が穿設されている。また、前記トーチ本体
4はその下部側壁に前記電極挿入穴5に達するねじ切り
穴6が形成されている。
For example, a rectangular column-shaped torch main body 4 made of a good heat conductive metal such as copper is provided in the rectangular cylindrical shield cover 1 with the wide outer surfaces of the torch main body 4 opposed to each other. 1 is inserted so as to be in contact with the opposed wide inner surface and the opposed narrow outer surface of the torch body 4 is separated from the opposed narrow inner surface of the shield cover 1 by a desired distance. ing. The upper end of the torch main body 4 is fixed to the support plate 2. The torch main body 4 has an electrode insertion hole 5 formed near its lower part. The torch main body 4 has a threaded hole 6 formed in the lower side wall thereof to reach the electrode insertion hole 5.

【0012】円柱状の電極7は、前記トーチ本体4の電
極挿入穴5にそのトーチ本体4の下端面から挿入されて
いる。この電極7は、図3に示すように前記シールドカ
バー1の開口部3を通して前記トーチ本体4のねじ切り
穴6に螺着された固定ねじ8により前記トーチ本体4の
電極挿入穴5に固定されている。耐熱性粘着テープ9
は、前記固定ねじ8の螺着後に前記開口部3を含む前記
シールドカバー1の外側面に貼着されて、前記開口部3
を塞いでいる。
The cylindrical electrode 7 is inserted into the electrode insertion hole 5 of the torch main body 4 from the lower end surface of the torch main body 4. The electrode 7 is fixed to the electrode insertion hole 5 of the torch main body 4 by a fixing screw 8 screwed into the threaded hole 6 of the torch main body 4 through the opening 3 of the shield cover 1 as shown in FIG. I have. Heat resistant adhesive tape 9
Is attached to the outer surface of the shield cover 1 including the opening 3 after the fixing screw 8 is screwed, and the opening 3
Is blocking.

【0013】2つの断面U字形の冷却水流通部材10
a,10bは、前記トーチ本体4の対向する幅の狭い外
側面と前記シールドカバー1の対向する幅の狭い内側面
との間に前記シールドカバー1の対向する幅の狭い内側
面に対して所望の隙間をあけるように前記支持板2を貫
通してそれぞれ挿入されている。これら冷却水流通部材
10a,10bは、図2に示すように一方の側壁が前記
トーチ本体4の対向する幅の狭い外側面にそれぞれ接触
され、かつ2つの側壁端部が前記シールドカバー1の対
向する幅の広い内側面に固定されている。2つの仕切板
11a,11bは、冷却水流通部材10a,10b内に
下端がその部材の底から所望距離隔ててそれぞれ挿入さ
れている。これらの仕切板11a,11bは、図2に示
すように側壁端部が前記シールドカバー1の対向する幅
の広い内側面に固定されている。このように2つの仕切
板11a,11bを前記冷却水流通部材10a,10b
内に挿入、固定することによって、前記冷却水流通部材
10a,10b内に冷却水の循環流路12a,12bが
それぞれ形成される。なお、前記冷却水流通部材10
a,10bおよび仕切板11a,11bにより冷却手段
を構成している。
Two cooling water flow members 10 having a U-shaped cross section
a and 10b are desired for the opposed narrow inner surface of the shield cover 1 between the opposed narrow outer surface of the torch body 4 and the opposed narrow inner surface of the shield cover 1. Are inserted through the support plate 2 so as to leave a gap. As shown in FIG. 2, the cooling water distribution members 10a and 10b have one side wall in contact with a narrow outer side surface of the torch body 4 facing each other, and two side wall end portions facing the shield cover 1. It is fixed to the wide inner surface. The lower ends of the two partition plates 11a and 11b are inserted into the cooling water flow members 10a and 10b at a desired distance from the bottom of the members. As shown in FIG. 2, these partition plates 11 a and 11 b have their side wall ends fixed to the opposed wide inner surfaces of the shield cover 1. Thus, the two partition plates 11a, 11b are connected to the cooling water flow members 10a, 10b.
The cooling water circulation passages 12a and 12b are formed in the cooling water flow members 10a and 10b by inserting and fixing the cooling water into the cooling water circulation members 10a and 10b, respectively. The cooling water flow member 10
a, 10b and partitioning plates 11a, 11b constitute cooling means.

【0014】また、前記冷却水流通部材10a,10b
を前記シールドカバー1に挿入、固定することにより、
これら冷却水流通部材10a,10bと前記シールドカ
バー1内面の間に2つのシールドガス流通空間13a,
13bがそれぞれ形成される。
The cooling water flow members 10a, 10b
Is inserted into the shield cover 1 and fixed,
Between the cooling water flow members 10a, 10b and the inner surface of the shield cover 1, two shield gas flow spaces 13a,
13b are respectively formed.

【0015】補助シールドガス噴射部材14は、前記シ
ールドカバー1の外周に上下動可能に取り付けられてい
る。この補助シールドガス噴射部材14は、前記シール
ドカバー1の外周に嵌合され、底部にガス噴射用多孔質
金属板15を有する中空矩形環状体16と、この中空矩
形環状体16の外周側壁に連結されたシールドガスの供
給管17とから構成されている。
The auxiliary shield gas injection member 14 is mounted on the outer periphery of the shield cover 1 so as to be vertically movable. The auxiliary shield gas injection member 14 is fitted on the outer periphery of the shield cover 1 and has a hollow rectangular annular body 16 having a gas injection porous metal plate 15 at the bottom, and is connected to the outer peripheral side wall of the hollow rectangular annular body 16. And a supply pipe 17 for the shielding gas.

【0016】このような構成の溶接トーチによれば、円
柱状の電極7をトーチ本体4の電極挿入穴5に固定する
際、図3に示すように固定ねじ8をシールドカバー1下
部付近の開口部3を通して前記トーチ本体4のねじ切り
穴6に螺着して前記トーチ本体4の電極挿入穴5に固定
することによって、トーチ本体4を含むシールドカバー
1を断面が偏平矩形状をなす薄型化することができる。
According to the welding torch having such a configuration, when the columnar electrode 7 is fixed to the electrode insertion hole 5 of the torch main body 4, as shown in FIG. By screwing into the threaded hole 6 of the torch main body 4 through the part 3 and fixing it to the electrode insertion hole 5 of the torch main body 4, the shield cover 1 including the torch main body 4 is thinned to have a flat rectangular cross section. be able to.

【0017】また、前記シールドカバー1下部付近に開
口部3を穿設することにより、前記固定ねじ8を前記ト
ーチ本体4のねじ切り穴6に螺着する作業を簡単かつ円
滑に行なうことができる。
Further, by forming the opening 3 near the lower portion of the shield cover 1, the operation of screwing the fixing screw 8 into the threaded hole 6 of the torch body 4 can be performed simply and smoothly.

【0018】さらに、耐熱性粘着テープ9を前記固定ね
じ8の螺着後に前記開口部3を含む前記シールドカバー
1の外側面に貼着されて、前記開口部3を塞ぐことによ
って、後述する溶接工程でシールドガスがこの開口部3
からシールドカバー1の外に逃散することなく十分な良
のシールドガスを前記電極7に向けて噴射することがで
きる。
Further, a heat-resistant adhesive tape 9 is adhered to the outer surface of the shield cover 1 including the opening 3 after the fixing screw 8 is screwed, and the opening 3 is closed, so that welding to be described later is performed. In the process, the shielding gas is
Therefore, a sufficiently good shield gas can be jetted toward the electrode 7 without escaping from the outside of the shield cover 1.

【0019】(実施例1)以下、前記薄型の溶接トーチ
による深い狭開先継手の溶接方法を図4を参照して説明
する。
(Embodiment 1) Hereinafter, a method of welding a deep narrow groove joint using the thin welding torch will be described with reference to FIG.

【0020】継手21a,21bの深く狭い開先22内
に電極7を含むシールドカバー1を挿入する。冷却水流
通部材10a,10b内の冷却水の循環流路12a,1
2bに冷却水をそれぞれ供給して前記電極7を固定する
銅製のトーチ本体4を冷却する。所望の溶接電力を前記
トーチ本体4を通して前記電極7に供給することにより
前記開先22底部をTIG溶接する。この時、シールド
ガスを2つのシールドガス流通空間13a,13bにそ
れぞれ供給してシールドガスを前記トーチ本体4から突
き出された前記電極7に向けて噴射すると共に、シール
ドガスを補助シールドガス噴射部材14の供給管17を
通して中空矩形環状体16内に供給し、その下部の多孔
質金属板15から前記シールドカバー1の下端側に向け
て噴射する。このようなシールドガスの噴射により前記
電極7の損傷と前記開先22の溶接金属23の酸化を防
ぐことができる。前記電極7を固定する銅製のトーチ本
体4の冷却、前記トーチ本体4への溶接電力の供給およ
び前記シールドガスの供給を続行しながら、前記電極7
を含むシールドカバー1を前記開先22の幅方向への移
動、および上方への移動(前記補助シールドガス噴射部
材14も上昇させる)を行なうことによって、前記開先
22を溶接金属で埋めて前記継手21a,21bの溶接
を完了する。
The shield cover 1 including the electrode 7 is inserted into the deep and narrow groove 22 of the joints 21a and 21b. Cooling water circulation channels 12a, 1 in cooling water circulation members 10a, 10b
Cooling water is supplied to 2b to cool the copper torch body 4 for fixing the electrode 7. By supplying a desired welding power to the electrode 7 through the torch body 4, the bottom of the groove 22 is TIG-welded. At this time, the shield gas is supplied to the two shield gas circulation spaces 13a and 13b to inject the shield gas toward the electrode 7 protruding from the torch main body 4, and the shield gas is supplied to the auxiliary shield gas injection member 14 Is supplied to the inside of the hollow rectangular annular body 16 through the supply pipe 17, and is sprayed from the porous metal plate 15 thereunder toward the lower end side of the shield cover 1. Such injection of the shielding gas can prevent damage to the electrode 7 and oxidation of the weld metal 23 in the groove 22. While continuing to cool the torch body 4 made of copper for fixing the electrode 7, supply welding power to the torch body 4, and supply the shielding gas, the electrode 7
The groove 22 is filled with weld metal by moving the shield cover 1 including the groove 22 in the width direction of the groove 22 and moving the groove upward (the auxiliary shield gas injection member 14 is also raised). The welding of the joints 21a and 21b is completed.

【0021】したがって、本発明に係る溶接トーチによ
れば深い狭開先継手を健全に溶接することができる。
Therefore, according to the welding torch of the present invention, a deep narrow groove joint can be welded soundly.

【0022】また、補助シールドガス噴射部材14を併
設することによって、溶接金属の酸化を効果的に防止し
つつ大電流の溶接が可能になる。しかも、補助シールド
ガス噴射部材14を上下動可能にすることによって、継
手の開先深さに合わせて補助シールドガス噴射部材14
の位置設定を行なうことができるため、溶接金属の酸化
をより一層効果的に防止することができる。
Further, by providing the auxiliary shield gas injection member 14 together, it is possible to perform welding with a large current while effectively preventing oxidation of the weld metal. Moreover, by making the auxiliary shield gas injection member 14 vertically movable, the auxiliary shield gas injection member 14
Therefore, the oxidation of the weld metal can be more effectively prevented.

【0023】事実、前述した図1から図3に示す溶接ト
ーチを用いて深さ200mm、幅12mmの開先を有す
る継手に溶接電流280A、溶接電圧10V、溶接速度
100mm/分、トーチからのシールドガス流量40L
/分、補助シールドガス噴射部材14からのシールドガ
ス流量150L/分の条件でTIG溶接したところ、健
全な溶接を行なうことができた。
In fact, using the welding torch shown in FIGS. 1 to 3 above, a joint having a groove having a depth of 200 mm and a width of 12 mm, a welding current of 280 A, a welding voltage of 10 V, a welding speed of 100 mm / min, and a shield from the torch. Gas flow 40L
/ Min, TIG welding was performed under the conditions of a shield gas flow rate of 150 L / min from the auxiliary shield gas injection member 14, and a sound welding was performed.

【0024】(実施例2)以下、前記薄型の溶接トーチ
による横向姿勢で深い狭開先継手の溶接方法を図5を参
照して説明する。
(Embodiment 2) A method of welding a deep narrow groove joint in a horizontal position using the thin welding torch will be described below with reference to FIG.

【0025】継手31a,31bの深く狭い開先32内
に電極7を含むシールドカバー1を横向きの姿勢で挿入
する。冷却水流通部材10a,10b内の冷却水の循環
流路12a,12bに冷却水をそれぞれ供給して前記電
極7を固定する銅製のトーチ本体4を冷却する。所望の
溶接電力を前記トーチ本体4を通して前記電極7に供給
することにより、図5の(a)に示すように前記開先3
2底部を上側ビート溶接を行なう。この時、シールドガ
スを2つのシールドガス流通空間13a,13bにそれ
ぞれ供給してシールドガスを前記トーチ本体4から突き
出された前記電極7に向けて噴射すると共に、シールド
ガスを補助シールドガス噴射部材14の供給管17を通
して中空矩形環状体16内に供給し、その下部の多孔質
金属板15から前記シールドカバー1の下端側に向けて
噴射する。このようなシールドガスの噴射により前記電
極7の損傷と前記開先32の溶接金属(ビート溶接部)
23の酸化を防ぐことができる。前記電極7を固定する
銅製のトーチ本体4の冷却、前記トーチ本体4への溶接
電力の供給および前記シールドガスの供給を続行しなが
ら、前記シールドカバー1の電極7の位置を変えて図5
の(b)に示すように前記上側ビート溶接部の下方部分
に下側ビート溶接を行なう。その後、前記上側ビート溶
接および下側ビート溶接を繰り返して図5の(c)に示
すように前記開先32を溶接金属33で埋めて前記継手
31a,31bの溶接を完了する。
The shield cover 1 including the electrode 7 is inserted into the deep and narrow groove 32 of the joints 31a and 31b in a lateral posture. Cooling water is supplied to the cooling water circulation channels 12a and 12b in the cooling water circulation members 10a and 10b, respectively, to cool the copper torch body 4 that fixes the electrode 7. By supplying a desired welding power to the electrode 7 through the torch main body 4, the groove 3 is formed as shown in FIG.
2 Perform bottom beat welding on the bottom. At this time, the shield gas is supplied to the two shield gas circulation spaces 13a and 13b to inject the shield gas toward the electrode 7 protruding from the torch main body 4, and the shield gas is supplied to the auxiliary shield gas injection member 14 Is supplied to the inside of the hollow rectangular annular body 16 through the supply pipe 17 and is sprayed from the porous metal plate 15 thereunder toward the lower end side of the shield cover 1. Such injection of the shielding gas damages the electrode 7 and weld metal of the groove 32 (beat weld).
23 can be prevented from being oxidized. While continuing to cool the torch body 4 made of copper fixing the electrode 7, supply the welding power to the torch body 4, and supply the shielding gas, the position of the electrode 7 on the shield cover 1 was changed while FIG.
As shown in (b), lower beat welding is performed on the lower part of the upper beat weld. Thereafter, the upper beat welding and the lower beat welding are repeated to fill the groove 32 with the welding metal 33 as shown in FIG. 5C, thereby completing the welding of the joints 31a and 31b.

【0026】したがって、本発明に係る溶接トーチによ
れば横向きの姿勢で深い狭開先継手を健全に溶接するこ
とができる。
Therefore, according to the welding torch according to the present invention, a deep narrow groove joint can be soundly welded in a horizontal position.

【0027】[0027]

【発明の効果】以上詳述したように本発明によれば、深
い狭開先継手を容易に溶接することができると共に、健
全な溶接が可能な溶接トーチを提供することができる。
As described above in detail, according to the present invention, it is possible to provide a welding torch which can easily weld a deep narrow groove joint and can perform sound welding.

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

【図1】本発明の溶接トーチを示す縦断面図。FIG. 1 is a longitudinal sectional view showing a welding torch of the present invention.

【図2】図1の溶接トーチのII−II線に沿う断面図。FIG. 2 is a cross-sectional view of the welding torch of FIG. 1 taken along the line II-II.

【図3】図1の要部拡大断面図。FIG. 3 is an enlarged sectional view of a main part of FIG. 1;

【図4】本発明の実施例1における深い狭開先継手の溶
接を説明するための斜視図。
FIG. 4 is a perspective view for explaining welding of a deep narrow groove joint according to the first embodiment of the present invention.

【図5】本発明の実施例2における深い狭開先継手を横
向き姿勢で溶接する工程を示す断面図。
FIG. 5 is a cross-sectional view showing a step of welding a deep narrow groove joint in a lateral posture according to the second embodiment of the present invention.

【図6】従来の溶接トーチを示す縦断面図。FIG. 6 is a longitudinal sectional view showing a conventional welding torch.

【図7】図6の溶接トーチのVII−VII線に沿う断面図。FIG. 7 is a sectional view of the welding torch of FIG. 6 taken along the line VII-VII.

【符号の説明】[Explanation of symbols]

1…シールドカバー、 3…開口部、 4…トーチ本体、 5…電極、 8…固定ねじ、 9…耐熱性粘着テープ、 10a,10b…冷却水流通部材、 14…補助シールドガス噴射部材、 21a,21b,31a,31b…継手、 22,32…開先。 DESCRIPTION OF SYMBOLS 1 ... Shield cover, 3 ... Opening, 4 ... Torch main body, 5 ... Electrode, 8 ... Fixing screw, 9 ... Heat resistant adhesive tape, 10a, 10b ... Cooling water distribution member, 14 ... Auxiliary shield gas injection member, 21a, 21b, 31a, 31b ... joint, 22, 32 ... groove.

フロントページの続き (72)発明者 小西 哲 兵庫県高砂市荒井町新浜2丁目1番1号 三菱重工業株式会社高砂製作所内 Fターム(参考) 4E001 AA03 BB07 LH04 NA01 Continuation of the front page (72) Inventor Satoshi Konishi 2-1-1, Shinhama, Arai-machi, Takasago-shi, Hyogo F-term in Takasago Works, Mitsubishi Heavy Industries, Ltd. (reference) 4E001 AA03 BB07 LH04 NA01

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 下端付近に開口部が穿設された矩形筒状
のシールドカバーと、 このシールドカバーの中心に挿入され、下部付近に電極
挿入穴が穿設された良熱伝導性金属からなる矩形柱状の
トーチ本体と、 前記シールドカバーと前記トーチ本体との間に前記トー
チ本体の側面に接触するとともに、前記シールドカバー
の内側面と所望の隙間をあけて配置された矩形中空状の
冷却手段と、 前記トーチ本体の電極挿入穴に下端が前記トーチ本体か
ら下方に突出するように挿入された電極と、 前記シールドカバーの開口部を通して前記トーチ本体の
下部側壁に螺着され、前記電極を前記トーチ本体に固定
するための固定ねじと、 前記開口部を含む前記シールドカバーの外側面に貼着さ
れた前記開口部を塞ぐための耐熱性粘着テープとを具備
したことを特徴とする溶接トーチ。
1. A rectangular cylindrical shield cover having an opening formed in the vicinity of a lower end thereof, and a good heat conductive metal inserted in the center of the shield cover and having an electrode insertion hole formed in the vicinity of a lower portion. A rectangular column-shaped torch main body, and a rectangular hollow cooling means arranged between the shield cover and the torch main body, in contact with a side surface of the torch main body, and arranged with a desired gap from an inner side surface of the shield cover. An electrode inserted into the electrode insertion hole of the torch main body such that a lower end protrudes downward from the torch main body, and is screwed to a lower side wall of the torch main body through an opening of the shield cover. A fixing screw for fixing to the torch main body; and a heat-resistant adhesive tape for closing the opening attached to the outer surface of the shield cover including the opening. Welding torch according to claim.
【請求項2】 さらにシールドガスを前記シールドカバ
ーの下部側に向けて噴射するための補助シールドガス噴
射手段は、前記シールドカバーの外側面に上下動可能に
取り付けられていることを特徴とする請求項1記載の溶
接トーチ。
2. The apparatus according to claim 1, wherein an auxiliary shield gas injection means for injecting the shield gas toward a lower side of the shield cover is vertically movably attached to an outer surface of the shield cover. Item 2. A welding torch according to Item 1.
JP2001001513A 2001-01-09 2001-01-09 Welding torch Withdrawn JP2002205171A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001001513A JP2002205171A (en) 2001-01-09 2001-01-09 Welding torch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001001513A JP2002205171A (en) 2001-01-09 2001-01-09 Welding torch

Publications (1)

Publication Number Publication Date
JP2002205171A true JP2002205171A (en) 2002-07-23

Family

ID=18870145

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001001513A Withdrawn JP2002205171A (en) 2001-01-09 2001-01-09 Welding torch

Country Status (1)

Country Link
JP (1) JP2002205171A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102151964A (en) * 2011-04-26 2011-08-17 中广核工程有限公司 Tungsten electrode argon arc welding gun
CN102626816A (en) * 2011-12-01 2012-08-08 兰州理工大学 Water-cooled welding gun for molten gas bath coupling active TIG welding
JP2018086671A (en) * 2016-11-29 2018-06-07 株式会社神戸製鋼所 Narrow groove welding torch, narrow groove welding method and narrow groove welding system
CN110891724A (en) * 2017-07-04 2020-03-17 弗罗纽斯国际有限公司 Welding gun

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102151964A (en) * 2011-04-26 2011-08-17 中广核工程有限公司 Tungsten electrode argon arc welding gun
CN102626816A (en) * 2011-12-01 2012-08-08 兰州理工大学 Water-cooled welding gun for molten gas bath coupling active TIG welding
JP2018086671A (en) * 2016-11-29 2018-06-07 株式会社神戸製鋼所 Narrow groove welding torch, narrow groove welding method and narrow groove welding system
CN110891724A (en) * 2017-07-04 2020-03-17 弗罗纽斯国际有限公司 Welding gun
CN110891724B (en) * 2017-07-04 2022-02-18 弗罗纽斯国际有限公司 Welding gun
US11597028B2 (en) 2017-07-04 2023-03-07 Fronius International Gmbh Welding torch

Similar Documents

Publication Publication Date Title
JP2002205171A (en) Welding torch
TW200510105A (en) TIG welding apparatus and TIG welding method
JP2007229757A (en) Underwater repair welding method
JPS6317031B2 (en)
US6884958B2 (en) Welding torch having integral collet and collet body and method of operating same
JP3712322B2 (en) Plasma arc welding method and apparatus
JPH10291069A (en) Method and device for butt welding
JPH0375272B2 (en)
Lee et al. A study on the process robustness of Nd: YAG laser-MIG hybrid welding of aluminum alloy 6061-T6
JPS59153581A (en) Gas shielded arc welding device
JPS6247630B2 (en)
KR102462732B1 (en) Laser welding jig
KR101593024B1 (en) Tip for welding apparatus and the method thereof
KR20030057013A (en) Thickness adjustable one body copper backing device when electro slag welding and electro gas welding
JP3684858B2 (en) Groove welding method
JPS6339347B2 (en)
JPH0635061B2 (en) Narrow groove TIG welding equipment
JPH0337820Y2 (en)
JPH0741588Y2 (en) Butt welding equipment for piping
US20040050823A1 (en) Welding torch having integral gas lens and collet and method of operating same
JPH0970667A (en) Tungsten inert gas (tig) welding equipment
JP2000042747A (en) Welding torch
KR102462731B1 (en) Laser welding jig
JPS6317590Y2 (en)
JPH0750057Y2 (en) Consumable electrode type gas shield arc welding torch

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: 20080401