JPH06225Y2 - Curved nozzle for submarine welding wire - Google Patents
Curved nozzle for submarine welding wireInfo
- Publication number
- JPH06225Y2 JPH06225Y2 JP1988130230U JP13023088U JPH06225Y2 JP H06225 Y2 JPH06225 Y2 JP H06225Y2 JP 1988130230 U JP1988130230 U JP 1988130230U JP 13023088 U JP13023088 U JP 13023088U JP H06225 Y2 JPH06225 Y2 JP H06225Y2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- wire
- welding
- welding wire
- curvature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Arc Welding In General (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は潜弧溶接ワイヤーを供給するための溶接ノズル
形状の改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement in the shape of a welding nozzle for supplying a latent arc welding wire.
潜弧溶接における従来のノズル１は、第５図に示すよう
にストレートなものが一般であり、規格品として市販さ
れている。このようなストレートノズルは、被溶接物の
条件に応じて垂直に、あるいは傾斜を付けて使用され
る。The conventional nozzle 1 for submerged arc welding is generally straight as shown in FIG. 5, and is commercially available as a standard product. Such a straight nozzle is used vertically or with an inclination depending on the condition of the object to be welded.
特にＵＯ鋼管やスパイラル鋼管等の大径鋼管２を外周上
に溶接する場合には第６図に示すように湯流れを防止す
るためにノズル１に傾斜を付けて使用しなければならな
い。さらに複数のノズルを用いて用いする場合には少な
くとも１本のノズルは大きく傾けて溶接しなければなら
ないため、次のような問題が発生する。In particular, when welding a large-diameter steel pipe 2 such as a UO steel pipe or a spiral steel pipe on the outer circumference, the nozzle 1 must be used with an inclination in order to prevent the flow of molten metal, as shown in FIG. Furthermore, when using a plurality of nozzles, at least one nozzle must be welded with a large inclination, which causes the following problems.
すなわち、ノズルを極端に傾けて使用するため溶接電流
が電流が変動し、溶接部の品質低下及びノズルの寿命低
下につながる。この原因は第７図に示すようにノズル１
がストレートであるため、ノズル穴を溶接ワイヤー３が
通る時に特にノズルの先端部のほぼ一点に集中して接触
し給電されるために、ノズルの消耗が激しいのと、高電
流でワイヤーがノズル内で振動するためノズル内でスパ
ークし溶接電流値が電動するためと考えられた このようなストレートノズルの問題点を解決できると見
られる発明が特開昭61-182885号公法に「ガスシールド
アーク溶接機のコンタクトチップ」として記載されてい
る。このチップはチップ本体に形成したスルーホールに
適度のうねり部を付与することによりチップ本体とワイ
ヤーとの電気的接触抵抗を安定且つ低減しアークスター
トを確実にするものである。しかしながら、このチップ
はストレートチップ内にうねりを持ったスルーホールを
設けたものであり、加工が極めて難しく高価な物になる
という欠点がある。That is, since the nozzle is used while being extremely tilted, the welding current fluctuates and the quality of the welded portion is deteriorated and the life of the nozzle is shortened. This is due to the nozzle 1 as shown in FIG.
Since the wire is straight, when the welding wire 3 passes through the nozzle hole, it is concentrated and comes into contact particularly at almost one point of the tip of the nozzle, and the power is supplied. It is thought that this is because the welding current value is electrically driven by sparking in the nozzle because it vibrates due to vibration in the nozzle, and an invention that seems to be able to solve the problem of such a straight nozzle is disclosed in Japanese Patent Laid-Open No. 61-182885, "Gas Shield Arc Welding" Machine contact tip ". This chip is one in which an appropriate waviness is provided in the through hole formed in the chip body to stabilize and reduce the electrical contact resistance between the chip body and the wire to ensure arc start. However, this chip has a through-hole having a swell in a straight chip, and has a drawback that it is extremely difficult to process and becomes an expensive product.
本考案はこれら従来技術の問題点を解決し、潜弧溶接時
に溶接アークを安定させ電流値の変動を防止して溶接部
の品質向上を図り且つノズルの寿命延命を図るための改
良されたノズルを提供するものである。The present invention solves these problems of the prior art, and an improved nozzle for stabilizing the welding arc during latent arc welding to prevent fluctuations in the current value to improve the quality of the welded portion and extend the life of the nozzle. Is provided.
本考案は潜弧溶接ワイヤーを供給する溶接ノズル形状に
おいて、ノズル先端部に曲率を与えたことを特徴とする
潜弧溶接ワイヤー用カーブドノズルである。The present invention is a curved nozzle for a latent arc welding wire, characterized in that, in a welding nozzle shape for supplying the latent arc welding wire, a curvature is given to a tip portion of the nozzle.
ストレートノズルにおける問題点の一つは、送給される
溶接ワイヤーがノズルの出口先端部に強く当たるために
起こるものであるから、本考案においてはワイヤーがス
ムーズに送給されるように第１図、第４図に示すように
ノズル先端部に曲率を与えるものである。このノズル先
端部の曲率はワイヤーの強度及び太さ等で多少変えてや
る必要があるが、要するに、本考案のノズルの実施例を
示す第１図のように溶接ワイヤー３をカーブドノズル１
の一方向に押しつけるようにして供給されるようにして
やればノズル１とワイヤー３の接触が点から面に変わる
ためワイヤー３とノズル１間での接触度が高められるこ
とによって、ワイヤーの振動をも防止しアークが安定
し、溶接品質が向上すると同時にノズルの寿命も延命可
能となるものである。One of the problems in the straight nozzle is that the welding wire to be fed hits the outlet end of the nozzle strongly, so in the present invention, the wire is smoothly fed as shown in FIG. As shown in FIG. 4, the nozzle tip is given a curvature. It is necessary to change the curvature of the tip of the nozzle to some extent depending on the strength and thickness of the wire, but in short, the welding wire 3 is connected to the curved nozzle 1 as shown in FIG. 1 showing an embodiment of the nozzle of the present invention.
If it is supplied by pressing it in one direction, the contact between the nozzle 1 and the wire 3 changes from a point to a surface, so that the contact degree between the wire 3 and the nozzle 1 is increased, and the vibration of the wire is also increased. It is possible to prevent the arc, stabilize the arc, improve the welding quality, and extend the life of the nozzle.
カーブドノズルの曲率の決定の仕方は溶接ビードと曲率
との関係から行う。第２図にノズルの曲率と溶接ビード
の幅及び高さとの関係を示す。すなわち、ノズル曲率が
大きくなるに従いビードの幅が広がり、ビード高さが低
くなる傾向がある。従ってこの関係からノズルの曲率を
随時求めればよいのであるが、一般には、ワイヤー径が
４mmφのときノズル先端部の曲率半径は150mmR〜250mmR
が望ましい。次に本考案のノズルの作製方法について説
明する。第３図は本考案のカーブドノズルの作製方法を
示す工程図であるが、まず市販の銅製ノズルを予め作製
してある鋼製の形枠に入れてプレスにより所定の曲率に
曲げるものである。形枠は必要に応じて数種類用意して
おけばよいから、製作費等費用は格安である。また本考
案のカーブドノズルは潜弧溶接でなくてもガスシールド
アーク溶接のチップとして用いてもよい。The curvature of the curved nozzle is determined based on the relationship between the weld bead and the curvature. FIG. 2 shows the relationship between the curvature of the nozzle and the width and height of the weld bead. That is, as the nozzle curvature increases, the bead width tends to widen and the bead height tends to decrease. Therefore, from this relationship, the curvature of the nozzle can be obtained at any time. Generally, when the wire diameter is 4 mmφ, the radius of curvature of the nozzle tip is 150 mmR to 250 mmR.
Is desirable. Next, a method of manufacturing the nozzle of the present invention will be described. FIG. 3 is a process diagram showing a method of manufacturing the curved nozzle of the present invention. First, a commercially available copper nozzle is put in a preformed steel frame and bent by a press to a predetermined curvature. Since it is sufficient to prepare several types of frame as needed, the cost of production etc. is cheap. Further, the curved nozzle of the present invention may be used as a tip for gas shield arc welding instead of latent arc welding.
以上のように本考案のカーブドノズルによれば、以下に
示す効果が得られる。As described above, according to the curved nozzle of the present invention, the following effects can be obtained.
(a)ノズル内での安定したワイヤー供給が可能となる。(a) A stable wire supply in the nozzle is possible.
(b)ノズル内でのワイヤーの振動が無くなり溶接アーク
が安定する。(b) The vibration of the wire inside the nozzle is eliminated and the welding arc is stabilized.
(c)ノズルの先端開口部がワイヤーにより消耗する頻度
が軽減されノズルの寿命が長くなる。（ストレートノズ
ルの４倍） このようにして、結果的には溶接欠陥の減少及びノズル
交換頻度の減少による実動率の向上につながる顕著な効
果がある。(c) The life of the nozzle is extended by reducing the frequency with which the tip opening of the nozzle is consumed by the wire. (4 times that of the straight nozzle) In this way, there is a remarkable effect that results in a reduction in welding defects and a reduction in the nozzle replacement frequency, which leads to an improvement in the actual operating rate.
第１図は本考案の実施例カーブドノズルを示す図、第２
図はノズルの曲率と溶接ビード形状との関係を示す図、
第３図は本考案のカーブドノズルの製作方法を示す工程
図、第４図は本考案のカーブドノズルを用いた場合の大
径鋼管の溶接状況を示す図、第５図は潜弧溶接トーチと
従来のストレートノズルを示す図、第６図は従来のスト
レートノズルを用いた場合の大径鋼管の溶接状況を示す
図、第７図は従来技術におけるストレートノズルとワイ
ヤーの給電状況を示す図である。 １…ノズル ２…大径鋼管 ３…ワイヤFIG. 1 is a view showing a curved nozzle according to an embodiment of the present invention, and FIG.
The figure shows the relationship between the curvature of the nozzle and the shape of the weld bead,
FIG. 3 is a process diagram showing a method for manufacturing a curved nozzle of the present invention, FIG. 4 is a diagram showing a welding condition of a large diameter steel pipe when the curved nozzle of the present invention is used, and FIG. 5 is a latent arc welding torch. FIG. 6 is a diagram showing a conventional straight nozzle, FIG. 6 is a diagram showing a welding state of a large diameter steel pipe when the conventional straight nozzle is used, and FIG. 7 is a diagram showing a power feeding state of a straight nozzle and a wire in a conventional technique. . 1 ... Nozzle 2 ... Large diameter steel pipe 3 ... Wire
Claims (1)
状において、ノズル先端部に曲率を与えたことを特徴と
する潜弧溶接ワイヤー用カーブドノズル。1. A curved nozzle for a latent arc welding wire, characterized in that, in a welding nozzle shape for supplying a latent arc welding wire, a curvature is given to a tip end portion of the nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988130230U JPH06225Y2 (en) | 1988-10-04 | 1988-10-04 | Curved nozzle for submarine welding wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988130230U JPH06225Y2 (en) | 1988-10-04 | 1988-10-04 | Curved nozzle for submarine welding wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0253881U JPH0253881U (en) | 1990-04-18 |
| JPH06225Y2 true JPH06225Y2 (en) | 1994-01-05 |
Family
ID=31385209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988130230U Expired - Lifetime JPH06225Y2 (en) | 1988-10-04 | 1988-10-04 | Curved nozzle for submarine welding wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06225Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60118386A (en) * | 1983-11-30 | 1985-06-25 | Sumitomo Metal Ind Ltd | Submerged arc welding method |
-
1988
- 1988-10-04 JP JP1988130230U patent/JPH06225Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0253881U (en) | 1990-04-18 |
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