JPS62248575A - Manufacture of welding can shell - Google Patents
Manufacture of welding can shellInfo
- Publication number
- JPS62248575A JPS62248575A JP9168886A JP9168886A JPS62248575A JP S62248575 A JPS62248575 A JP S62248575A JP 9168886 A JP9168886 A JP 9168886A JP 9168886 A JP9168886 A JP 9168886A JP S62248575 A JPS62248575 A JP S62248575A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- face
- welding
- welded
- slope
- 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.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 235000001674 Agaricus brunnescens Nutrition 0.000 abstract 2
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 230000003796 beauty Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- 239000002335 surface treatment layer Substances 0.000 description 13
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 229910052742 iron Inorganic materials 0.000 description 9
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 8
- 235000011613 Pinus brutia Nutrition 0.000 description 8
- 241000018646 Pinus brutia Species 0.000 description 8
- 239000010410 layer Substances 0.000 description 5
- 238000010292 electrical insulation Methods 0.000 description 4
- 239000005029 tin-free steel Substances 0.000 description 4
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying 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
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- CLDVQCMGOSGNIW-UHFFFAOYSA-N nickel tin Chemical compound [Ni].[Sn] CLDVQCMGOSGNIW-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- GZCWPZJOEIAXRU-UHFFFAOYSA-N tin zinc Chemical compound [Zn].[Sn] GZCWPZJOEIAXRU-UHFFFAOYSA-N 0.000 description 1
- 229910001174 tin-lead alloy Inorganic materials 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は溶接缶胴の製造方法に関し、さらに詳しくは溶
接部の補修性や美観が改善された、電気抵抗マツシュシ
ーム溶接法による、食缶、炭酸飲料缶等に用いられる溶
接缶胴の製造方法に関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method for manufacturing a welded can body, and more specifically to a method for manufacturing a welded can body, and more specifically, a method for manufacturing a welded can body, which is produced by electric resistance matshu seam welding, which improves the repairability and aesthetic appearance of the welded part. This invention relates to a method for manufacturing welded can bodies used for carbonated beverage cans, etc.
（従来の技術）
最近特公昭５４−２６２１３号公報に開示されているタ
イプの所謂スードロニツク溶接機を用いて、錫めっき鋼
板等の金属ブランクの、対向する端縁部を重ね合せて、
重ね合せ部を有する缶胴成形体を形成し、その重ね合せ
部を、その両面に、表面平坦な線電極を対接させて、電
気抵抗マツシュシーム溶接して、溶接缶胴を製造する方
法が注目されている。(Prior art) Using a so-called Sudronik welding machine of the type recently disclosed in Japanese Patent Publication No. 54-26213, opposing edges of metal blanks such as tin-plated steel plates are overlapped,
A method of manufacturing a welded can body by forming a can body molded body having an overlapping part, connecting wire electrodes with flat surfaces to both sides of the overlapping part, and welding the overlapping part with electric resistance mash seam is attracting attention. has been done.
このマツシュシーム溶接による溶接部の厚さは通常板厚
の約１．３〜１．７倍であって、溶接部の側方に、比較
的急激な勾配の段差部（第２図の２２参照）が生成する
。そして溶接のさい、溶接強度を高めようとして、溶接
加圧力を増すとか、溶接電流を大きくした場合などに段
差部に円周方向外方に延びる、不規則な形状の所謂はみ
出し鉄（第２図２３参照）が生じたり、あるいは上記は
み出し鉄の生ずる附近にスプラッシュ（溶融鉄の飛沫、
図示されない）が耐着し易い。The thickness of the welded area created by this pine seam welding is approximately 1.3 to 1.7 times the normal plate thickness, and there is a step with a relatively steep slope on the side of the welded area (see 22 in Figure 2). is generated. During welding, when the welding pressure is increased or the welding current is increased in an attempt to increase the welding strength, irregularly shaped so-called protruding iron (see Fig. 23), or splash (splash of molten iron,
(not shown) is easily resistant to adhesion.
従って内容物による内面側溶接部およびその近傍の腐食
を防止するため、塗料の塗布、乾燥等によって、これら
の部分を補修するさい、塗膜の欠落部、あるいはごく薄
い部分が生じ易く、満足な補修効果を得ることが困難で
あるという問題を生ずる。Therefore, when repairing these parts by applying paint, drying, etc. in order to prevent corrosion of the inner welds and their vicinity due to the contents, the paint film tends to be missing or very thin parts, making it unsatisfactory. A problem arises in that it is difficult to obtain a repair effect.
外面側の腐食環境が悪い状態で用いられる場合には、外
面側溶接部に同様の問題を生ずる。When used in a bad corrosive environment on the outside, similar problems occur at the weld on the outside.
内容物が乾燥品、油性液体、あるいは油性エアロソール
等の場合は、内面腐食の問題は起り難い。If the contents are dry products, oily liquids, or oily aerosols, problems of internal corrosion are unlikely to occur.
しかしこの場合でも、溶接部近傍の外面に生じた不規則
な形状のはみ出し鉄やスプラッシュは外観を損ね、商品
価値を低下し易いという問題を生ずる。また内面側につ
いても、開缶後、開口部近傍の溶接部は肉視されるので
、同様の問題を生じ易い。However, even in this case, there arises a problem in that irregularly shaped protruding iron or splashes that occur on the outer surface near the welded portion impairs the appearance and tends to reduce the commercial value. Further, on the inner surface side, the welded portion near the opening is visible after the can is opened, and the same problem is likely to occur.
さらに、上記従来の溶接方法では、ティンフリースチー
ル等のように、比較的電気絶縁性の高い表面処理層を有
する表面処理鋼板よりなる缶胴成形体を用いる場合、溶
接されるべき端縁部から表面処理層を除去することなし
に、満足な溶接強度を有する溶接缶胴を製造することは
実用的に不可能であった口
（発明が解決しようとする問題点）
本発明は、内外面のうち、少なくとも一方の補修性の改
善された、マツシュシーム溶接部を有する、溶接缶胴の
製造方法の提供を目的とする。Furthermore, in the conventional welding method described above, when using a can body formed body made of a surface-treated steel plate having a surface treatment layer with relatively high electrical insulation, such as tin-free steel, from the edge to be welded, It was practically impossible to manufacture a welded can body with satisfactory welding strength without removing the surface treatment layer (Problem to be solved by the invention) The present invention solves the problem of The object of the present invention is to provide a method for manufacturing a welded can body having a pine seam welded portion in which repairability of at least one of the parts is improved.
本発明は、内外面のうち、少なくとも一方の美観の改善
されたマツシュシーム溶接部を有する溶接缶胴の製造方
法の提供を他の目的とする。Another object of the present invention is to provide a method for manufacturing a welded can body having a pine seam welded portion with improved aesthetic appearance on at least one of the inner and outer surfaces.
本発明は、缶胴成形体が、ティンフリースチール等のよ
うに、比較的電気絶縁性の高い表面処理層を有する表面
処理鋼板よりなる場合であっても、溶接されるべき端縁
部から表面処理層を除去することなしに、実用的に満足
な溶接強度をもつマツシュシーム溶接部を有する、溶接
缶胴の製造方法の提供を、さらに他の目的とする。Even if the can body formed body is made of a surface-treated steel sheet having a surface treatment layer with relatively high electrical insulation properties, such as tin-free steel, the present invention provides for Still another object of the present invention is to provide a method for manufacturing a welded can body having a matte seam welded portion having a practically satisfactory welding strength without removing a treated layer.
゛ （問題点を解決するための手段）
本発明は、金属ブランクの対向する端縁部を重ね合せて
、重ね合せ部を有する缶胴成形体を形成し、該重ね合せ
部を、電気抵抗マツシュシーム溶接して、溶接缶胴を製
造する方法において、該重ね合せ部の少なくとも一方の
面側の電極面は、線電極の平坦な面よりなる主部と、該
線電極を支持する電極ロールの、該主部に連接する勾配
面を有する側縁突起部よりなっており、該重ね合せ部に
おける該端縁部の端面が、該勾配面近傍の該主部部分の
上か、もしくは該勾配面の上に位置するように該缶胴成
形体を送入して、上記溶接のさい該端面近傍の材料が該
勾配面に沿って円周方向外方に流れるようにして、マツ
シュシーム溶接を行なうことを特徴とする。゛ (Means for solving the problem) The present invention overlaps opposing edge portions of metal blanks to form a can body molded body having an overlapping portion, and the overlapping portion is formed using an electric resistance mash seam. In a method for producing a welded can body by welding, the electrode surface on at least one surface side of the overlapping portion includes a main portion consisting of a flat surface of a wire electrode, and an electrode roll supporting the wire electrode. It consists of a side edge protrusion having a sloped surface connected to the main part, and the end surface of the edge part in the overlapping part is on the main part near the sloped surface or on the side of the sloped surface. Matsushi seam welding is carried out by feeding the molded can body so that it is positioned above so that the material near the end surface flows outward in the circumferential direction along the sloped surface during the welding. Features.
（作用）
溶接のさい、重ね合せ部の端面近傍の材料が勾配面に沿
って円周方向外方に流れるので、はみ出し鉄やスプラッ
シュが生成しても、それらは側縁突起部に対応する断面
形状に押し潰されて、実質的に消滅し、上記流動した材
料と共に、勾配面によって規定された勾配の、美観と補
修性の改善された溶接段差部を形成する。(Function) During welding, the material near the end face of the overlapping part flows outward in the circumferential direction along the sloped surface, so even if protruding iron or splash is generated, it will not flow through the cross section corresponding to the side edge protrusion. It collapses into shape and substantially disappears, forming, with the flowed material, a weld step of a slope defined by the sloped surface, with improved aesthetics and repairability.
缶胴成形体の重ね合せ部に、比較的電気絶縁性の高い表
面処理層が存する場合でも、両電極面に側縁突起部が形
成されているときは、マツシュシーム溶接により重ね合
せ部が押し潰されると、端縁部の裸の端面がはみ出して
勾配面に接触し、また端縁部の側縁突起部と接触した部
分は特に変形量が大きいので、その表面処理層にクラッ
クが発生するため、両電極ロールの勾配面間を、はみ出
した端面と上記クラックを通って電流が流れ易くなる故
、比較的スムースに溶接が行なわれて、実用的に満足な
溶接強度を有するマツシュシーム溶接部が形成される。Even if there is a surface treatment layer with relatively high electrical insulation properties in the overlapped part of the can body molded body, if side edge protrusions are formed on both electrode surfaces, the overlapped part will be crushed by matshu seam welding. When this happens, the bare end surface of the edge protrudes and comes into contact with the sloped surface, and the portion of the edge that comes into contact with the side edge protrusion is particularly deformed, causing cracks to occur in the surface treatment layer. Since the current easily flows between the sloped surfaces of both electrode rolls, through the protruding end surface and the crack, welding is performed relatively smoothly, and a matshu seam welded part with a practically satisfactory welding strength is formed. be done.
（実施例）
第１図において、１１は缶胴成形体、１２は重ね合せ部
である。缶胴成形体１１（要部のみ図示した）は、錫め
っき鋼板、ティンフリースチール。(Example) In FIG. 1, 11 is a molded can body, and 12 is an overlapping portion. The can body molded body 11 (only the main parts are shown) is made of tin-plated steel plate or tin-free steel.
極薄ニッケルめっき鋼板、極薄ニッケル・錫複合めっき
鋼板、極薄錫めっき鋼板、ブラックプレート等の金属ブ
ランク（図示されない）の、対向する端縁部１１ａｂよ
びｌｌｂを重ね合せることによって形成される。１３お
よび１４はそれぞれ、内側電極ロールおよび外側電極ロ
ールであり、１５および１６はそれぞれ、内側電極ロー
ル１３および外側電極ロールによって支持される内側線
電極および外側線電極である。It is formed by overlapping opposing edges 11ab and 11b of a metal blank (not shown) such as an ultra-thin nickel-plated steel plate, an ultra-thin nickel-tin composite plated steel plate, an ultra-thin tin-plated steel plate, or a black plate. 13 and 14 are an inner electrode roll and an outer electrode roll, respectively, and 15 and 16 are an inner line electrode and an outer line electrode supported by the inner electrode roll 13 and the outer electrode roll, respectively.
重ね合せ部１２の内側電極ロール１３側の電極面１９は
、線電極１５の平坦な上面１５ａよりなる主部１７と、
内側電極ロール１３の、主部１７に連接する、好ましく
は比較的緩やかな勾配の勾配面１８ａ、および断面平坦
な短円筒形の突起面１８ｂを有する側縁突起部１８より
なっている。The electrode surface 19 of the overlapping portion 12 on the inner electrode roll 13 side includes a main portion 17 consisting of the flat upper surface 15a of the wire electrode 15;
The inner electrode roll 13 is composed of a side edge protrusion 18 that is connected to the main portion 17 and preferably has a sloped surface 18a having a relatively gentle slope, and a protrusion surface 18b having a short cylindrical shape and a flat cross section.
重ね合せ部１２の外側電極ロール１４側の面は、線電極
１６の平坦な下面１５ａのみよシなる電極面２１に対接
する。なおマツシュシーム溶接が可能となるように、電
極面１９および２１の幅は、重ね合せ部１２の幅よりも
大きく定められている。The surface of the overlapping portion 12 on the outer electrode roll 14 side is in contact with the electrode surface 21 that is only the flat lower surface 15a of the wire electrode 16. Note that the widths of the electrode surfaces 19 and 21 are set to be larger than the width of the overlapping portion 12 so that pine seam welding is possible.
（作用）
溶接にさいし、第１図に示すように、重ね合せ部１２に
おける下側端縁部１１ａの端面１１ａ１が、勾配面１８
ａ近傍の主部１７の部分１７ｍの上に位置するように、
缶胴成形体１１を電極面間に送入する。なお後述の第３
図に示すように、端面１１ａ１が勾配面１８ａの上に位
置するように送入してもよい。(Function) During welding, as shown in FIG.
so as to be located above the portion 17m of the main portion 17 near a,
The can body molded body 11 is fed between the electrode surfaces. In addition, the third
As shown in the figure, it may be fed so that the end surface 11a1 is located above the sloped surface 18a.
マツシュシーム溶接の進行に伴ない、重ね合せ部１２に
対応する部分の厚さは減少し、この部分の材料は円周方
向外方に流れる、すなわちはみ出す。そのため端面１１
ａ１近傍の材料は、勾配面１８ａＫ沿って、もしくはさ
らに突起面ｔａｂに沿って、円周方向外方に流動する。As the pine seam welding progresses, the thickness of the portion corresponding to the overlapped portion 12 decreases, and the material in this portion flows outward in the circumferential direction, that is, it protrudes. Therefore, the end surface 11
The material near a1 flows outward in the circumferential direction along the sloped surface 18aK or further along the protruding surface tab.
そのさい上側端縁部Ｌｌｂの、端ｉ１Ｕ １１ ａ、の
外側の下面近傍２０の上に、はみ出し鉄（第２図の２３
参照）やスプラッシュ（図示されない）が生成しても、
それらは側縁突起部１８に対応する断面形状に押し潰さ
れて、実質的に消滅し、上記流動した材料と共に、第２
図に示すように、大部分が比較的緩やかな勾配の、塗料
等による補修が容易な内面側段差部２を形成する。At this time, a protruding iron (23 in FIG.
) or splash (not shown).
They are crushed to a cross-sectional shape corresponding to the side edge protrusion 18 and substantially disappear, and together with the flowed material, the second
As shown in the figure, an inner surface stepped portion 2 is formed that has a relatively gentle slope for the most part and is easy to repair with paint or the like.
一方、外側線電極１６側の電極面２１は全体が平坦であ
るので、得られる溶接缶胴３の溶接部１の外面側には、
不規則な、凹凸の激しい形状のはみ出し鉄２３、および
溶接条件によってはスプラッシュ（図示されない）によ
って形成される、急激の勾配のほぼ垂下する外面側段差
部２２が生成する。なお、外側電極ロール１４側の電極
面は、線電極を用いることなく、外側電極ロールの全幅
が平坦な電極面のみによってなっていてもよい。On the other hand, since the electrode surface 21 on the side of the outer wire electrode 16 is flat as a whole, the outer surface side of the welded part 1 of the resulting welded can body 3 has
Depending on the welding conditions, a substantially drooping external step portion 22 with a steep slope is formed by the protruding iron 23 having an irregular and highly uneven shape and by splash (not shown). Note that the electrode surface on the side of the outer electrode roll 14 may be made of only a flat electrode surface over the entire width of the outer electrode roll, without using a wire electrode.
溶接部１の外面側にも、内面側段差部２と同様な、好ま
しくは比較的緩やかな勾配の段差部を得たい場合は、第
３図、第４図に示すように、外側電極ロール１４側の電
極面２２も、線電極１６の平坦な下面１６ａよりなる主
部１７、および外側電極ロール１４の勾配面１８＆なら
びに突起面ｔａｂよりなる側縁突起部１８によって形成
されるようにすればよい。また溶接缶胴の用途によって
、溶接部の外面側のみに好ましくは比較的緩やかな勾配
の段差部を得たい場合は、外側電極ロール１４側の電極
面のみを上記構成の電極面２２とし、内側電極ロール１
３側の電極面は、全幅にわたり平坦な、線電極の上面又
は電極ロールの電極面のみによってなるようにすればよ
い。If it is desired to obtain a stepped portion on the outer surface of the welded portion 1 that is similar to the inner stepped portion 2 and preferably has a relatively gentle slope, as shown in FIGS. 3 and 4, an outer electrode roll 14 is used. The side electrode surface 22 may also be formed by the main portion 17 consisting of the flat lower surface 16a of the wire electrode 16, and the side edge protrusion 18 consisting of the sloped surface 18 & of the outer electrode roll 14 and the protrusion surface tab. . In addition, depending on the use of the welded can body, if it is desired to obtain a stepped part with a relatively gentle slope only on the outer surface side of the welded part, only the electrode surface on the outer electrode roll 14 side should be the electrode surface 22 of the above configuration, and Electrode roll 1
The electrode surface on the third side may be formed only by the upper surface of the wire electrode or the electrode surface of the electrode roll, which is flat over the entire width.
側縁突起部１８の高さくト））９幅等は、溶接中に側縁
突起部１８が、上側端縁部１１ｂの下面に接触しないよ
うに定められることが望ましい。接触した下面部分にス
パーク痕が生成して、耐食性が損われるからである。そ
のためには高さくｈ）はＱ、５Ｘｇ（ｇはブランク板厚
）以下、より好ましくは０３５×ｇ以下であることが望
ましい。またはみ出し鉄を押し潰して、前記の比較的緩
やかな勾配の段差部２を得るためには、高さくｈ）は０
．ＩＸｇ以上、より好ましくは０．２Ｘｇ以上であるこ
とが好ましい。It is desirable that the height, width, etc. of the side edge protrusion 18 are determined so that the side edge protrusion 18 does not come into contact with the lower surface of the upper end edge 11b during welding. This is because spark marks are generated on the lower surface portion of the contact, which impairs corrosion resistance. For this purpose, it is desirable that the height (h) is equal to or less than Q,5×g (g is the blank plate thickness), more preferably equal to or less than 035×g. Alternatively, in order to obtain the stepped portion 2 with a relatively gentle slope by crushing the protruding iron, the height h) must be 0.
．． It is preferable that it is IXg or more, more preferably 0.2Xg or more.
得られる溶接部の段差部２の形状は、勾配面１８ａに規
制されて、後者の形状と等しくなるのであるが、勾配面
１８ａの勾配角θ（第１図）は、約５〜７０度、より好
ましくは約１０〜４０度であることが望ましい。約４０
度より小さくした場合、補修塗膜の極端に薄い部分が発
生するのを防ぐことができる。さらに勾配面１８ａと主
部１７は、曲率半径が０．１ ｍ以上の曲率部１８ａ、
を介して接続することが好ましい。補修塗膜の極端に薄
い部分の発生を防ぐためである。The shape of the stepped portion 2 of the resulting welded part is regulated by the slope surface 18a and is equal to the latter shape, but the slope angle θ (FIG. 1) of the slope surface 18a is about 5 to 70 degrees, More preferably, it is about 10 to 40 degrees. Approximately 40
If the thickness is smaller than 100%, it is possible to prevent extremely thin areas of the repair coating from occurring. Further, the slope surface 18a and the main portion 17 have a curvature portion 18a with a radius of curvature of 0.1 m or more,
It is preferable to connect via. This is to prevent the occurrence of extremely thin parts of the repair coating.
また勾配面は適宜の断面形状をとりうるものであり、例
えば第５図に１８ａで示されるように、内側に若干凹ん
だ湾曲面であってもよく、この場合の勾配角θは、主部
１７の勾配面１８ａ側の端部１７ｂと、側縁突起部１８
の突起面１８ｂの勾配面１８ａ側の端部１８ｂ、を結ぶ
直線と、主部１７の延長線とのなす角θとして定義され
る。Further, the sloped surface can have an appropriate cross-sectional shape, and for example, as shown by 18a in FIG. 5, it may be a curved surface slightly concave inward. In this case, the slope angle θ is 17 on the slope surface 18a side, and the side edge protrusion 18
It is defined as the angle θ between the straight line connecting the end portion 18b of the protruding surface 18b on the slope surface 18a side and the extension line of the main portion 17.
なお、第１図に示されるように、勾配面１８＆と突起面
１８ｂが曲率部１８ａ２を介して接続する場合は、曲率
部１８ａ２は勾配面１８ａの１部分となる。In addition, as shown in FIG. 1, when the slope surface 18& and the protrusion surface 18b are connected via the curvature part 18a2, the curvature part 18a2 becomes one part of the slope surface 18a.
また突起面１８ｂはなく、勾配面１８ａのみであっても
よい。ただしこの場合は、不規則な形状のはみ出し鉄の
生成を防ぐため、材料が勾配面１８ｍを越えて外方に流
出しない条件で溶接することが望ましい。Further, the protruding surface 18b may not be provided, and only the sloped surface 18a may be provided. However, in this case, in order to prevent the formation of irregularly shaped protruding iron, it is desirable to weld under conditions that the material does not flow outward beyond the 18 m slope.
缶胴成形体を形成する金属ブランクが、ティンフリース
チール（電解クロム醗処理鋼板）や極薄ニッケルめっき
鋼板のように、一番上の表面層として比較的厚い（通常
金属クロム換算１０ｍ１／ｍ２以上）、電気絶縁性のク
ロメート層（水利クロム酸化物層）が形成されている表
面処理鋼板よりなる場合であっても、第３図に示すよう
に、重ね合せ部１２の両面に、平坦な主部１７と側縁突
起部１８よりなる電極面１９および２２を対接させてマ
ツシュシーム溶接を行なうことにより、溶接されるべき
端縁部のクロメート層を含む表面処理層を除去しないで
も、実用的に満足な溶接強度上もつ溶接部を有する溶接
缶胴を製造することができる。The metal blank that forms the can body molded body is relatively thick as the top surface layer, such as tin-free steel (electrolytic chromium-treated steel sheet) or ultra-thin nickel-plated steel sheet (usually 10 m1/m2 or more in terms of metal chromium). ), even if it is made of a surface-treated steel sheet with an electrically insulating chromate layer (hydraulic chromium oxide layer) formed thereon, as shown in FIG. By performing matt seam welding with the electrode surfaces 19 and 22 consisting of the portion 17 and the side edge protrusion 18 facing each other, it is possible to weld the electrode surfaces 19 and 22 in a practical manner without removing the surface treatment layer including the chromate layer at the edge to be welded. A welded can body having a welded portion with satisfactory welding strength can be manufactured.
ただしこの場合、線電極として、錫又は錫合金（例えば
錫−亜鉛合金？錫−鉛合金等のように比較的低融点の）
被覆（被覆厚みは通常０．５〜５Ｉ／ｍ２）銅線を用い
ることが望ましい。上記のタイプの金属ブランクよりな
る、表面処理層を除去しな、い缶胴成形体に対して、裸
の銅線を用いる場合は、ピッチング（ｐｉｔｔｉｎｇ
）状の、局部的な溶損部が溶接部表面に発生し易いから
である。However, in this case, as a wire electrode, tin or a tin alloy (e.g. tin-zinc alloy? Tin-lead alloy, etc. with a relatively low melting point) is used.
It is desirable to use a coated (coating thickness is usually 0.5 to 5 I/m2) copper wire. If bare copper wire is used for a molded can body made of the above-mentioned type of metal blank without removing the surface treatment layer, pitting
This is because localized welding parts in the form of ) are likely to occur on the surface of the welded part.
また溶接は空気中で行なってもよいが、溶接部の酸化に
よる黒化を防止する九め不活性ガス雰囲気（窒素、アル
ゴン、ヘリウム、炭酸ガス等の）で溶接を行なうことが
好ましい。Although welding may be performed in air, it is preferable to perform welding in an inert gas atmosphere (such as nitrogen, argon, helium, carbon dioxide, etc.) to prevent blackening of the welded portion due to oxidation.
本発明者等の知見によれば、上記の、タイプの、重ね合
せ部に電気絶縁性の表面処理層を有する缶胴成形体に対
し、表面平坦な従来の線電極を用いて、所謂スードロニ
ツタ溶接機によりマツシュシーム溶接する場合、錫めっ
き鋼板よりなる缶胴成形体の場合よりも遥かに高い溶接
加圧力（同−重ね合せ部幅当りの）を加えることにより
、表面処理層（クロメート層）が破壊されて、表面の電
気抵抗が低下するので、一応マツシュシーム溶接が可能
となる。According to the findings of the present inventors, so-called Sudronita welding can be performed on the above-mentioned type of can body molded body having an electrically insulating surface treatment layer at the overlapping portion using a conventional wire electrode with a flat surface. When welding seams using a machine, the surface treatment layer (chromate layer) is destroyed by applying a much higher welding pressure (per width of the overlapping part) than when forming a can body made of tin-plated steel sheets. As a result, the electrical resistance of the surface decreases, making it possible to perform pine seam welding.
しかしながらこの場合は、高い加圧力のため、溶接時に
、重ね合せ部の長さ方向の両端部、特に尾端のブランク
端縁部が円周方向外方にずれて、この部分の溶接部幅が
減少したシ、極端の場合は衝合せ的な溶接部となって、
この部分の溶接強度が減少して、７ランジ加工やネック
イン加工等に耐える満足な溶接部が得られない。However, in this case, due to the high pressure, during welding, both lengthwise ends of the overlapping part, especially the blank end edge at the tail end, shift outward in the circumferential direction, resulting in the welding part width at this part being In extreme cases, it becomes a butt-like weld,
The welding strength of this part decreases, making it impossible to obtain a satisfactory welded part that can withstand seven-lunge processing, neck-in processing, and the like.
本発明の場合は、上記のタイプの缶胴成形体に対し、溶
接加圧力を上記の重ね合せ部のずれを生じない程度に低
くしても、満足な溶接部を得ることができる。その理由
は次のように推測される。In the case of the present invention, a satisfactory weld can be obtained for the above-described type of can body molded body even if the welding pressure is low enough to prevent the above-mentioned displacement of the overlapped portion. The reason is assumed to be as follows.
重ね合せ部の長さ方向の特定部分は、線電極に接触する
と間もなく、電気抵抗加熱されて軟化しく低炭素鋼板の
軟化開始温度は約５００〜６００℃である）、重ね合せ
部は押し潰され始める。そのため電気絶縁性の表面処理
層のない裸の、両端縁部端面がはみ出して、対応する電
極ロールの勾配面に接触する。また押し潰しのさい、重
ね合せ部の両端縁部の側縁突条部と接触した部分の変形
量が特に大きくなるので、その表面処理層にクラックが
発生する。そのため両勾配面間全、はみ出した端面と上
記クラックを通って電流が流れ易くなって、比較的スム
ースに溶接が行なわれるものと推測される。As soon as a specific portion in the length direction of the overlapping part comes into contact with the wire electrode, it is heated by electrical resistance and becomes softened (the softening starting temperature of low carbon steel sheets is about 500 to 600°C), and the overlapping part is crushed. start. As a result, the bare end surfaces of both edges without the electrically insulating surface treatment layer protrude and come into contact with the sloped surfaces of the corresponding electrode rolls. Furthermore, during crushing, the amount of deformation of the portions of both end edges of the overlapping portion that are in contact with the side edge protrusions becomes particularly large, and thus cracks occur in the surface treatment layer. Therefore, it is presumed that current flows easily between both sloped surfaces, through the protruding end face and the above-mentioned crack, and welding is performed relatively smoothly.
（発明の効果）
本発明の方法によれば、内外面のうち、少なくとも一方
の面に、比較的緩やかな勾配の段差部を有し、その近傍
に不規則な形状のはみ出し鉄やスプラッシュの殆んどみ
られない、補修性と外観が改善されたマツシュシーム溶
接部を備えた、溶接缶胴を製造することができるという
効果を奏する。(Effects of the Invention) According to the method of the present invention, at least one of the inner and outer surfaces has a stepped portion with a relatively gentle slope, and most of irregularly shaped protruding iron and splashes are present in the vicinity of the step portion with a relatively gentle slope. It is possible to produce a welded can body having a matte seam welded part that is rarely seen and has improved repairability and appearance.
さらに缶胴成形体が、比較的電気絶縁性の高い表面処理
層を有する金属ブランクよりなる場合であっても、その
重ね合せ部近傍の表面処理層を除去しなくても、重ね合
せ部の両面に、側縁突起部を有する電極面を対接させて
マツシュシーム溶接を行なうことにより、上記の補修性
と外観が改善された、かつ全長にわたり実用的に満足な
溶接強度を有するマツシュシーム溶接部を備えた、溶接
缶胴を製造できるという効果を奏する。Furthermore, even if the can body formed body is made of a metal blank having a surface treatment layer with relatively high electrical insulation properties, both sides of the overlapped area can be removed without removing the surface treatment layer near the overlapped area. By performing pine seam welding with electrode surfaces having side edge protrusions facing each other, the above-mentioned repairability and appearance are improved, and a pine seam welded part is provided which has practically satisfactory welding strength over the entire length. In addition, there is an effect that a welded can body can be manufactured.
第１図および第２図は夫れ夫れ、本発明の方法の第１の
例による溶接が行なわれる寸前、および溶接終了直後の
状態を示す説明用要部縦断面図、第３図および第４図は
夫れ夫れ、本発明の方法のＷ、２の例による溶接が行な
われる寸前、および溶接終了直後の状態を示す説明用要
部縦断面図、第５図は本発明の方法に用いられる電極面
の例の要部プロフィルを示す説明用図面である。
ｌ・・・溶接部、２・・・段差部、３・・・溶接缶胴、
１１・・・缶胴成形体、ｌｌａ・・・下側端縁部、ｌｌ
ａ、・・・端面、１２・・・重ね合せ部、１３・・・（
内側）電極ロール、１４・・・（外側）電極ロール、１
５ 、 ｌ ６−・・線電極、１７・・・主部、１８・
・・側縁突起部、１８ａ・・・勾配面、１９．２２・・
・電極面。
第１図
第２図
第３図
第４図
第５図1 and 2 are explanatory longitudinal cross-sectional views of essential parts showing the state just before welding is performed and immediately after welding according to the first example of the method of the present invention, and FIG. 3 and FIG. Figure 4 is an explanatory longitudinal sectional view of essential parts showing the state just before welding is performed and immediately after welding according to example W and 2 of the method of the present invention, and Figure 5 is a longitudinal sectional view of the main part according to the method of the present invention. It is an explanatory drawing showing a principal part profile of an example of an electrode surface used. l...Welded part, 2...Stepped part, 3...Welded can body,
11...Can body molded body, lla...lower end edge, ll
a, ... end face, 12 ... overlapping part, 13 ... (
Inner) electrode roll, 14... (outer) electrode roll, 1
5, l 6--line electrode, 17... main part, 18-
...Side edge protrusion, 18a...Slope surface, 19.22...
・Electrode surface. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5
Claims (1)
ね合せ部を有する缶胴成形体を形成し、該重ね合せ部を
、電気抵抗マッシュシーム溶接して、溶接缶胴を製造す
る方法において、該重ね合せ部の少なくとも一方の面側
の電極面は、線電極の平坦な面よりなる主部と、該線電
極を支持する電極ロールの、該主部に連接する勾配面を
有する側縁突起部よりなっており、該重ね合せ部におけ
る該端縁部の端面が、該勾配面近傍の該主部部分の上か
、もしくは該勾配面の上に位置するように該缶胴成形体
を送入して、上記溶接のさい該端面近傍の材料が該勾配
面に沿って円周方向外方に流れるようにして、マッシュ
シーム溶接を行なうことを特徴とする溶接缶胴の製造方
法。(1) A method of manufacturing a welded can body by overlapping opposing edge parts of metal blanks to form a can body molded body having an overlapping part, and performing electric resistance mash seam welding on the overlapping part. In this, the electrode surface on at least one surface side of the overlapping part includes a main part made of a flat surface of the wire electrode, and a side having a sloped surface connected to the main part of the electrode roll supporting the wire electrode. The molded can body is formed of an edge protrusion, and the formed body is arranged such that the end surface of the edge in the overlapping portion is located above the main portion near the sloped surface or above the sloped surface. A method for manufacturing a welded can body, characterized in that mash seam welding is performed by feeding a material near the end surface and causing material in the vicinity of the end surface to flow outward in the circumferential direction along the slope surface during the welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9168886A JPS62248575A (en) | 1986-04-21 | 1986-04-21 | Manufacture of welding can shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9168886A JPS62248575A (en) | 1986-04-21 | 1986-04-21 | Manufacture of welding can shell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62248575A true JPS62248575A (en) | 1987-10-29 |
| JPH0343947B2 JPH0343947B2 (en) | 1991-07-04 |
Family
ID=14033443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9168886A Granted JPS62248575A (en) | 1986-04-21 | 1986-04-21 | Manufacture of welding can shell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62248575A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4729340B2 (en) * | 2005-05-19 | 2011-07-20 | コーセル株式会社 | Power circuit |
-
1986
- 1986-04-21 JP JP9168886A patent/JPS62248575A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0343947B2 (en) | 1991-07-04 |
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