JP2634868B2 - Welding method of galvanized steel sheet - Google Patents
Welding method of galvanized steel sheetInfo
- Publication number
- JP2634868B2 JP2634868B2 JP19417188A JP19417188A JP2634868B2 JP 2634868 B2 JP2634868 B2 JP 2634868B2 JP 19417188 A JP19417188 A JP 19417188A JP 19417188 A JP19417188 A JP 19417188A JP 2634868 B2 JP2634868 B2 JP 2634868B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- groove
- galvanized steel
- steel sheet
- galvanized
- 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 - Fee Related
Links
- 238000003466 welding Methods 0.000 title claims description 75
- 238000000034 method Methods 0.000 title claims description 28
- 229910001335 Galvanized steel Inorganic materials 0.000 title claims description 21
- 239000008397 galvanized steel Substances 0.000 title claims description 21
- 238000007747 plating Methods 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 23
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 12
- 239000003517 fume Substances 0.000 description 12
- 229910052725 zinc Inorganic materials 0.000 description 11
- 239000011701 zinc Substances 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- IPCXNCATNBAPKW-UHFFFAOYSA-N zinc;hydrate Chemical compound O.[Zn] IPCXNCATNBAPKW-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は亜鉛メッキ鋼板に亜鉛メッキが施された被溶
接物を溶接する方法に関するものであり、特に亜鉛メッ
キ鋼板を用いて形成される配電用機器の容器に亜鉛メッ
キが施された種々の金具を溶接するのに好適な溶接方法
に関するものである。Description: TECHNICAL FIELD The present invention relates to a method of welding a galvanized steel plate to a galvanized work piece, and more particularly to a power distribution formed using a galvanized steel plate. TECHNICAL FIELD The present invention relates to a welding method suitable for welding various metal-plated metal fittings to a container of equipment for use.
［従来の技術］ 長期にわたり無補修で運転を行うことが要請される柱
上変圧器や、柱上開閉器等の装柱配電用機器は、海岸地
域や重工業地域等の悪条件地域で使用された場合にも、
容易に錆びが生じないように防錆処理が施される。費用
や効果の展から、この種の機器の防錆処理には、亜鉛メ
ッキが広く用いられている。従来は、容器本体の製缶後
にハンガー座やブラケット等を容器本体に溶接し、その
後に容器本体を溶融亜鉛湯中に沈めて、いわるゆどぶ漬
けメッキ法により一括して亜鉛メッキを施していた。し
かしながら、どぶ漬けメッキ法によるメッキは設備が大
掛かりである上、公害を生じさせないようにするための
管理が大変であるため、容器本体を製造する工程でメッ
キ処理をなるべく行わないですむようにしたいという要
請があった。そこで予め亜鉛メッキが施された亜鉛メッ
キ鋼板を購入し、この鋼板を用いて容器を製造すること
が提案された。[Prior art] Pole distribution equipment such as pole transformers and pole switches, which are required to be operated without repair for a long time, are used in badly conditioned areas such as coastal areas and heavy industrial areas. Even if
Rust prevention treatment is applied so that rust does not easily occur. From the viewpoint of cost and effect, galvanization is widely used for rust prevention treatment of this kind of equipment. Conventionally, a hanger seat or a bracket is welded to the container body after the container body is made, and then the container body is immersed in molten zinc water and galvanized collectively by the so-called dip pickling method. Was. However, the plating by the dip pickling method requires a large amount of equipment and is very difficult to control so as not to cause pollution. Therefore, there is a request to minimize the plating process in the process of manufacturing the container body. was there. Therefore, it has been proposed to purchase a galvanized steel sheet that has been subjected to galvanization in advance, and to manufacture a container using the steel sheet.
［発明が解決しようとする課題］ しかしながら亜鉛メッキ鋼板のメッキ表面部分に亜鉛
メッキされた底板，ハンガー座等の被溶接物を接合する
場合に、一般的な被覆アーム溶接を用いると、配電用機
器の容器の溶接部に要求される所定の強度、気密性また
は液密性を得られないことが判った。この問題は、他の
用途で亜鉛メッキ鋼板を用いる場合にも、程度は異なる
が同様に生じている。[Problems to be Solved by the Invention] However, when joints to be welded such as a galvanized bottom plate and a hanger seat are joined to a galvanized steel plate plating surface portion, power distribution equipment can be obtained by using general covering arm welding. It was found that the required strength, airtightness or liquid tightness required for the welded portion of the container could not be obtained. This problem similarly occurs to a different extent when galvanized steel sheets are used for other applications.
本発明の目的は、亜鉛メッキ鋼板のメッキ表面部分に
亜鉛メッキが施された被溶接物を溶接するのに好適な溶
接方法を提供することにある。An object of the present invention is to provide a welding method suitable for welding a workpiece in which galvanized surface of a galvanized steel sheet is plated.
［課題を解決するための手段］ 本発明は、上記課題を解決するために、亜鉛メッキ鋼
板のメッキ表面部分に突合される被溶接物の突合せ面と
メッキ表面部分との間に開先角度が小さい両刃形開先を
形成する。そしてこの開先に沿って低温溶融形のノンガ
ス・フラックス入り溶接ワイヤを用いてノンガスシール
ドアーク溶接を行う。[Means for Solving the Problems] In order to solve the above problems, the present invention provides a groove angle between a butt surface of a work to be welded to a plating surface portion of a galvanized steel sheet and a plating surface portion. Form a small double-edged groove. Then, non-gas shielded arc welding is performed along the groove using a low-temperature melting type non-gas flux-cored welding wire.
［発明の作用］ 亜鉛メッキは、比較的低温でヒューム化する。亜鉛ヒ
ュームが大量に発生すると、溶融金属は短時間内に多量
のヒュームを吸収し、溶接金属内にブローホール，割れ
等が多量に生じて溶接欠陥が発生する。したがって亜鉛
メッキ鋼板に溶接を行う場合には、できる限り亜鉛ヒュ
ームの発生を阻止する必要がある。そこで種々試験を繰
り返した結果、低温溶融形のノンガス・フラックス入り
溶接ワイヤを用いてノンガスシールドアーク溶接を行う
と、良好な溶接結果が得られることが判った。そして試
験の過程で、低温溶融形のフラックス入り溶接ワイヤを
用いてノンガスシールドアーク溶接を行う場合に、開先
角度を大きくすると多層溶接が必要になり、亜鉛ヒュー
ムの発生量が多くなることから、良好な溶接結果が得ら
れないことが判った。そこで本発明においては、開先角
度を小さくし、しかも開先角度を小さくした場合にも十
分な強度を得るために両刃形開先を採用する。そして最
良の溶接法として、亜鉛ヒュームの発生を極力少なくす
ることができる、低温溶融形のノンガス・フラックス入
り溶接ワイヤを用いたノンガスシールドアーク溶接を行
う。[Action of the Invention] Galvanization fumes at a relatively low temperature. When a large amount of zinc fume is generated, the molten metal absorbs a large amount of fume within a short period of time, and a large amount of blowholes, cracks, etc. are generated in the weld metal to generate welding defects. Therefore, when welding to a galvanized steel sheet, it is necessary to prevent the generation of zinc fume as much as possible. Therefore, as a result of repeating various tests, it was found that good welding results were obtained when non-gas shielded arc welding was performed using a low-melting-type non-gas flux-cored welding wire. And in the course of the test, when performing non-gas shielded arc welding using a low-melting type flux-cored welding wire, if the groove angle is increased, multi-layer welding is required, and the amount of zinc fume generated will increase, It was found that good welding results could not be obtained. Therefore, in the present invention, a double-edged groove is employed in order to reduce the groove angle and obtain sufficient strength even when the groove angle is reduced. As the best welding method, non-gas shielded arc welding using a low-melting type non-gas flux-cored welding wire capable of minimizing the generation of zinc fume is performed.
［実施例］ 以下図面を参照して本発明の実施例を詳細に説明す
る。Embodiment An embodiment of the present invention will be described below in detail with reference to the drawings.
本発明を、第４図に示すような変圧器１の容器本体２
の側壁2aにハンガー座３を溶接する場合に適用した実施
例について説明する。第４図の容器本体２は、亜鉛メッ
キ鋼板を用いて製缶されている。製缶する場合には、適
当な長さに切断された一枚の亜鉛メッキ鋼板を円筒状に
成形し、切断端部をアーク溶接によって接合して側壁2a
を作る。切断端部には亜鉛メッキが存在しないため、通
常の被覆アーク溶接で十分な溶接結果を得ることができ
る。そしてこの円筒状の側壁2aに亜鉛メッキ鋼板を円形
に切断して形成した底壁2bを溶接する。底壁2bの溶接の
場合には、側壁2aの内周面には亜鉛メッキ層があるた
め、本発明の方法によって底壁2bを溶接している。尚第
４図において、４は容器本体２に溶接されたブラケッ
ト、５はピン６によってブラケット４に回動自在に支持
されたカバー締付具、７はアイボルト、そして８はカバ
ーである。これらブラケット４乃至カバー８は、防錆の
ために亜鉛メッキが施されている。The present invention is applied to a container body 2 of a transformer 1 as shown in FIG.
An embodiment applied to the case where the hanger seat 3 is welded to the side wall 2a of the first embodiment will be described. The container body 2 shown in FIG. 4 is made of a galvanized steel plate. When making cans, one piece of galvanized steel sheet cut to an appropriate length is formed into a cylindrical shape, and the cut ends are joined by arc welding to form a side wall 2a.
make. Since there is no galvanization at the cut end, a sufficient welding result can be obtained by ordinary covered arc welding. Then, a bottom wall 2b formed by cutting a galvanized steel sheet into a circle is welded to the cylindrical side wall 2a. In the case of welding the bottom wall 2b, the bottom wall 2b is welded by the method of the present invention because there is a galvanized layer on the inner peripheral surface of the side wall 2a. In FIG. 4, reference numeral 4 denotes a bracket welded to the container body 2, reference numeral 5 denotes a cover fastener rotatably supported on the bracket 4 by pins 6, reference numeral 7 denotes an eyebolt, and reference numeral 8 denotes a cover. These brackets 4 to 8 are plated with zinc for rust prevention.
第１図には、第４図の容器本体２の側壁2aにコ字状の
ハンガー座３を本発明の方法によって溶接する場合の、
容器本体２とハンガー座３の形状との関係を示してあ
る。前述通り、容器本体２の側壁2aは亜鉛メッキ鋼板を
用いて成形したものであるため、鋼板21の両面には亜鉛
メッキ層22及び23が形成されている。ハンガー座３は、
容器本体２を形成する鋼板よりも厚い亜鉛メッキ鋼板を
コ字状に成形した後、取付端部3a及び3bの突合せ面を所
望の開先形状が得られるように加工して製造してもよ
く、また先に鋼板を所望の形状に成形した後、取付端部
の突合せ面にマスクを施してどぶ漬けメッキ法により亜
鉛メッキを施すようにして製造してもよい。何れの方法
によりハンガー座３を製造する場合でも、ハンガー座３
は鋼板31の周囲に亜鉛メッキ層32が形成され、取付端部
3a及び3bの突合せ面にはメッキ層が形成されない構成を
有している。FIG. 1 shows a case where the U-shaped hanger seat 3 is welded to the side wall 2a of the container body 2 of FIG. 4 by the method of the present invention.
The relationship between the container body 2 and the shape of the hanger seat 3 is shown. As described above, since the side wall 2a of the container body 2 is formed using a galvanized steel plate, galvanized layers 22 and 23 are formed on both surfaces of the steel plate 21. Hanger seat 3,
After forming a galvanized steel sheet thicker than the steel sheet forming the container body 2 into a U-shape, it may be manufactured by processing the butting surfaces of the mounting ends 3a and 3b so as to obtain a desired groove shape. Alternatively, the steel plate may be formed into a desired shape first, and then a mask may be applied to the abutting surface of the mounting end portion, followed by galvanizing by a dipping plating method. Whichever method is used to manufacture the hanger seat 3, the hanger seat 3
Has a galvanized layer 32 formed around a steel plate 31 and has a mounting end
It has a configuration in which a plating layer is not formed on the abutting surfaces of 3a and 3b.
第２図には、ハンガー座３の一方の取付端部3aと容器
本体２との関係を拡大して示してある。同図に示される
ように、容器本体２の側壁2aの外周面と突合されるハン
ガー座３の取付端部3aの突合せ面3a1は、側壁2aの亜鉛
メッキ層22（メッキ表面部分）との間に開先角度θが非
常に小さい両刃形開先を形成するようにその形状が定め
られている。ここで両刃形開先（またはＫ形開先）と
は、被溶接物の接合端部の両側に開先を設ける開先形状
を云う。この開先角度θは、一回の溶接作業または肉盛
り作業で充填可能な程度に小さいことが好ましい。第３
図に示すように複数回の肉盛り作業を行わなければ充填
できない程に開先角度θを大きくした場合には、好まし
い溶接結果を得ることはできない。FIG. 2 shows an enlarged view of the relationship between one mounting end 3a of the hanger seat 3 and the container body 2. As shown in the figure, the abutting surface 3a1 of the mounting end 3a of the hanger seat 3 which abuts with the outer peripheral surface of the side wall 2a of the container body 2 is between the galvanized layer 22 (plated surface portion) of the side wall 2a. The shape is determined so as to form a double-edge groove with a very small groove angle θ. Here, the double-edged groove (or K-shaped groove) refers to a groove shape in which grooves are provided on both sides of the joint end of the workpiece. This groove angle θ is preferably small enough to be filled by one welding operation or overlaying operation. Third
As shown in the figure, if the groove angle θ is set to a value that is too large to be filled without performing a plurality of overlaying operations, a favorable welding result cannot be obtained.
溶接は、低温溶融形のノンガス・フラックス入り溶接
ワイヤを用いてノンガスシールドアーク溶接法で行う。
ノンガス・フラックス入り溶接ワイヤとは、管状のワイ
ヤの内部にガス発生剤、脱窒剤、脱酸剤等を含むフラッ
クスが入った溶接ワイヤであり、この種の溶接ワイヤと
しては、例えば米国のリンカーン社（LINCOLN）がNR−1
52の商品名で販売しているノンガス・フラックス入り溶
接ワイヤを用いることができる。ノンガスシールドアー
ク溶接法は、CO2ガス溶接のようにシールドガスを用い
ずに、ガス発生剤がフラックス中に入った溶接ワイヤを
用いてアーク溶接を行う溶接法である。Welding is performed by a non-gas shielded arc welding method using a low-melting type non-gas flux-cored welding wire.
The non-gas flux-cored welding wire is a welding wire in which a flux containing a gas generating agent, a denitrifying agent, a deoxidizing agent, etc. is contained inside a tubular wire. (LINCOLN) is NR-1
Non-gas flux-cored welding wires sold under 52 trade names can be used. The non-gas shielded arc welding method is an arc welding method that uses a welding wire in which a gas generating agent has entered a flux without using a shielding gas as in CO 2 gas welding.
第１図の開先形状と第３図の開先形状の場合につい
て、ノンガスシールドアーク溶接法により溶接した場合
の試験結果は、下記の表１に示す通りであった。試験
は、５つの試料について、リップルの少ない直流アーク
溶接機を用いて行った。アーク電圧が15V、電流が165
A、溶接ワイヤ（NR−152）の直径が1.7mmφ、ワイヤ送
給速度が1.27m/分、溶接速度が0.3m/分の溶接条件で溶
接を行った。容器本体２に用いた亜鉛メッキ鋼板の板厚
は2.3mmで、またハンガー座３に用いた鋼板の板厚は約6
mmであり、両者の亜鉛メッキ層の亜鉛目付量はＺ−60相
当であった。The test results when the groove shape shown in FIG. 1 and the groove shape shown in FIG. 3 were welded by the non-gas shielded arc welding method were as shown in Table 1 below. The test was performed on five samples using a DC arc welder with little ripple. Arc voltage 15V, current 165
A, Welding was performed under the welding conditions in which the diameter of the welding wire (NR-152) was 1.7 mmφ, the wire feeding speed was 1.27 m / min, and the welding speed was 0.3 m / min. The thickness of the galvanized steel plate used for the container body 2 is 2.3 mm, and the thickness of the steel plate used for the hanger seat 3 is about 6 mm.
mm, and the zinc basis weight of both galvanized layers was equivalent to Z-60.
上記表１及び下記表２において、◎印は「良好」（裸
鋼板を溶接した時のレベル）○印は「良」、△印は「や
や不良」、そして×印は「不良」を意味している。表１
から判るように、開先角度を大きく取った第３図の開先
形状の場合と比べて、開先形状を第１図のようにほぼ一
回の溶接作業で充填できる程度の開先角度を持つような
形状にすると、スパッタ量、ビード外観及び断面マクロ
（溶接金属割れ）において優れた結果が得られることが
判る。第３図のように開先角度を大きくした場合に不良
が発生するのは、低温溶融のノンガス・フラックス入り
溶接ワイヤを用いた場合でも、多層溶接を行う必要が生
じ、多層溶接を行うと溶接のたびに溶接部近傍の亜鉛メ
ッキが加熱されるため、亜鉛メッキが短時間に多量にヒ
ューム化して開先から吹きでるためであると考えられ
る。これはヒュームが多くなるとブローホールの数及び
溶接金属割れも増える上、ヒュームの吹出しによって溶
融金属の肉盛りがしにくくなるためであると考えられ
る。これに対して第１図のように開先角度を小さくする
と、亜鉛メッキのヒューム化及びヒュームの吹出しを少
なくできるため、良好な溶接結果を得られる。開先角度
を小さくしても、本発明のように両刀形開先とすれば、
使用に支障のない程度に十分な機械的強度を得ることが
できる。このような試験結果から、第１図の開先形状が
亜鉛メッキ鋼板の溶接に好ましい開先形状であることが
判明した。 In Tables 1 and 2 above, ◎ means “good” (level when bare steel plate is welded) ○ means “good”, Δ means “slightly poor”, and × means “bad” ing. Table 1
As can be seen from FIG. 3, compared to the case of the groove shape of FIG. 3 in which the groove angle is large, the groove shape is such that the groove shape can be filled by almost one welding operation as shown in FIG. It can be seen that when the shape has such a shape, excellent results can be obtained in spatter amount, bead appearance, and cross-sectional macro (weld metal crack). As shown in FIG. 3, when the groove angle is increased, the failure occurs because the multi-layer welding must be performed even when a low-temperature melting non-gas flux-cored welding wire is used. This is considered to be because the galvanization near the welded portion is heated every time, and the galvanization fumes in a large amount in a short time and blows out from the groove. This is presumably because the number of blow holes and the number of weld metal cracks increase as the amount of fume increases, and it becomes difficult to build up the molten metal by blowing the fume. On the other hand, when the groove angle is reduced as shown in FIG. 1, fusing of zinc plating and blowing of fume can be reduced, so that good welding results can be obtained. Even if the groove angle is reduced, if a double-sword groove is used as in the present invention,
Sufficient mechanical strength can be obtained so as not to hinder use. From these test results, it was found that the groove shape shown in FIG. 1 was a preferable groove shape for welding a galvanized steel sheet.
またノンガスシールドアーク溶接法が、他の溶接頬に
比べて、亜鉛メッキ鋼板の溶接に優れていることは、種
々の溶接法を用いた試験から判明した。これは低温溶融
形のノンガス・フラックス入り溶接ワイヤを用いてノン
ガスシールドアーク溶接法で溶接を行うと、亜鉛ヒュー
ムの発生を極力抑えることができることに起因するもの
と考えられる。なお下記表２は同じ条件の試料を、それ
ぞれ異なった溶接法で溶接した場合の結果を示してい
る。この試験で用いた試料は、亜鉛目付量がＺ−60相当
であり、溶接は水平すみ肉溶接で行った。In addition, it was found from tests using various welding methods that the non-gas shielded arc welding method was superior to the welding of galvanized steel sheets as compared with other welding cheeks. This is considered to be due to the fact that the generation of zinc fume can be suppressed as much as possible by performing non-gas shielded arc welding using a low-temperature melting type non-gas flux-cored welding wire. Table 2 below shows the results when samples under the same conditions were welded by different welding methods. The sample used in this test had a zinc basis weight equivalent to Z-60, and the welding was performed by horizontal fillet welding.
尚上記表２においてＸ線検査の項の数字は、溶接金属
中に存在するブローホールの数である。 In Table 2, the number in the item of X-ray inspection is the number of blow holes present in the weld metal.
上記表２から判るように、本発明の溶接法を用いる
と、スパッタ量、断面マクロ（溶接金属割れ）において
他の溶接法と比べて優れた結果が得られており、総合評
価として最良の結果が得られることが理解できるであろ
う。As can be seen from Table 2 above, when the welding method of the present invention was used, excellent results were obtained in spatter amount and cross-sectional macro (weld metal cracking) as compared with other welding methods, and the best result was obtained as a comprehensive evaluation. It can be seen that
なお本発明の方法で溶接した場合でも、溶接部の周囲
には溶接カスやスパッタが残るため、溶接後にはショッ
トブラストをかけてこれらを除去する。ショットブラス
トをかけると、溶接部から離れた亜鉛メッキ層の部分に
もショットによっ凹凸ができる。この凹凸は後に施され
る下塗り塗料の密着性を良好にする機能を果たす。溶接
ビード及び溶接熱によって亜鉛メッキ層が蒸発した部分
には、タッチアップとして亜鉛粉末を多量に含む下塗り
塗料が塗られるか、亜鉛溶射が行われる。Even when welding is performed by the method of the present invention, since welding residues and spatter remain around the welded portion, shot blasting is performed after welding to remove these. When shot blasting is applied, irregularities are formed by shots on the galvanized layer away from the weld. These irregularities serve to improve the adhesion of the undercoat paint applied later. An undercoat containing a large amount of zinc powder is applied as a touch-up to the portion where the galvanized layer has evaporated due to the welding bead and the welding heat, or zinc spraying is performed.
上記実施例は、容器本体２にハンガー座３を溶接する
場合について説明したが、容器本体２の側壁2aに底壁2b
を溶接する場合にも良好な溶接結果が得られるのは勿論
である。また本発明の方法は、配電用電気機器の容器の
溶接に限られず、あらゆる用途に用いられる亜鉛メッキ
鋼板の溶接に適用できる。In the above embodiment, the case where the hanger seat 3 is welded to the container body 2 has been described, but the bottom wall 2b is attached to the side wall 2a of the container body 2.
It goes without saying that good welding results can also be obtained when welding. Further, the method of the present invention is not limited to welding of containers of electric equipment for power distribution, but can be applied to welding of galvanized steel sheets used for various applications.
［発明の効果］ 本発明によれば、亜鉛メッキ鋼板のメッキ表面部分に
突合される被溶接物の突合せ面とメッキ表面部分との間
に開先角度が小さい両刃形開先を形成し、低温溶融形の
ノンガス・フラックス入り溶接ワイヤを用いて開先に沿
ってノンガスシールドアーク溶接を行って溶接するの
で、亜鉛ヒュームの発生をできる限り抑えて、良好な溶
接結果と所望の強度，気密性及び液密性を得ることがで
きる。[Effects of the Invention] According to the present invention, a double-edged groove having a small groove angle is formed between the butted surface of the work to be welded to the plated surface portion of the galvanized steel sheet and the plated surface portion, and the low-temperature groove is formed. Since non-gas shielded arc welding is performed along the groove using a non-gas, flux-cored welding wire in the form of fusion, welding is performed, so that the generation of zinc fume is suppressed as much as possible, and good welding results and desired strength, airtightness and Liquid tightness can be obtained.
第１図は本発明を用いて容器本体にハンガー座を溶接す
る場合の開先状態を示す図、第２図は開先状態の拡大
図、第３図は本発明の方法を実施する場合の好ましくな
い開先状態を示す図、第４図は本発明の方法を実施して
溶接される変圧器の容器の構成を示す図である。 １……変圧器、２……容器本体、2a……側壁、2b……底
壁、３……ハンガー座、４……ブラケット、21……鋼
板、22,32……亜鉛メッキ層。FIG. 1 is a diagram showing a groove state when a hanger seat is welded to a container body using the present invention, FIG. 2 is an enlarged view of the groove state, and FIG. 3 is a diagram showing a case where the method of the present invention is carried out. FIG. 4 is a view showing an unfavorable groove state, and FIG. 4 is a view showing an arrangement of a transformer container welded by performing the method of the present invention. 1 ... transformer, 2 ... container body, 2a ... side wall, 2b ... bottom wall, 3 ... hanger seat, 4 ... bracket, 21 ... steel plate, 22, 32 ... galvanized layer.
フロントページの続き (72)発明者 西村 新 大阪府箕面市坊島１―６―22 (72)発明者 中島 淳雄 大阪府大阪市北区中之島３丁目３番22号 関西電力株式会社内 (72)発明者 奥 清司 大阪府大阪市北区中之島３丁目３番22号 関西電力株式会社内 (72)発明者 本邑 喜代一 大阪府大阪市淀川区田川２丁目１番11号 株式会社ダイヘン内 (72)発明者 初瀬 忠之 大阪府大阪市淀川区田川２丁目１番11号 株式会社ダイヘン内Continued on the front page (72) Inventor Nishimura Shin 1-6-22, Bojima, Minoh-shi, Osaka (72) Inventor Atsushi Nakajima 3-2-2 Nakanoshima, Kita-ku, Osaka-shi, Osaka Kansai Electric Power Co., Inc. (72) Invention Kiyoshi Oku 3-3-22 Nakanoshima, Kita-ku, Osaka-shi, Kansai Electric Power Co., Inc. (72) Inventor Kiyoichi Motomura 2-1-1, Tagawa, Yodogawa-ku, Osaka-shi, Osaka Daihen Co., Ltd. (72) Invention Tadayuki Hatsuse 2-1-1-11 Tagawa, Yodogawa-ku, Osaka City, Osaka Dainai Co., Ltd.
Claims (1)
ッキが施された被溶接物を溶接する方法において、 前記メッキ表面部分に突合される前記被溶接物の突合せ
面と前記メッキ表面部分との間に開先角度が小さい両刃
形開先を形成し、 低温溶融形のノンガス・フラックス入り溶接ワイヤを用
いて前記開先に沿ってノンガスシールドアーク溶接を行
うことを特徴とする亜鉛メッキ鋼板の溶接方法。1. A method for welding an object to be galvanized on a plating surface portion of a galvanized steel sheet, wherein a butt surface of the object to be welded to the plating surface portion and the plating surface portion are connected. Welding a galvanized steel sheet by forming a double-edged groove with a small groove angle therebetween and performing non-gas shielded arc welding along the groove using a low-temperature melting type non-gas flux-cored welding wire Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19417188A JP2634868B2 (en) | 1988-08-03 | 1988-08-03 | Welding method of galvanized steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19417188A JP2634868B2 (en) | 1988-08-03 | 1988-08-03 | Welding method of galvanized steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0246980A JPH0246980A (en) | 1990-02-16 |
| JP2634868B2 true JP2634868B2 (en) | 1997-07-30 |
Family
ID=16320110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19417188A Expired - Fee Related JP2634868B2 (en) | 1988-08-03 | 1988-08-03 | Welding method of galvanized steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2634868B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5333806A (en) * | 1992-06-03 | 1994-08-02 | Verbatim Corporation | Magnetic tape cartridge |
-
1988
- 1988-08-03 JP JP19417188A patent/JP2634868B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0246980A (en) | 1990-02-16 |
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