JPS6316862A - Manufacture of welded can - Google Patents
Manufacture of welded canInfo
- Publication number
- JPS6316862A JPS6316862A JP15977586A JP15977586A JPS6316862A JP S6316862 A JPS6316862 A JP S6316862A JP 15977586 A JP15977586 A JP 15977586A JP 15977586 A JP15977586 A JP 15977586A JP S6316862 A JPS6316862 A JP S6316862A
- Authority
- JP
- Japan
- Prior art keywords
- seam
- welding
- end part
- welded
- electrode
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 238000003466 welding Methods 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 4
- 230000035515 penetration Effects 0.000 abstract description 11
- 230000010355 oscillation Effects 0.000 abstract 1
- 238000004826 seaming Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002271 resection Methods 0.000 description 2
- 230000005540 biological transmission 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
- 238000010586 diagram Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は溶接缶の製造方法に関する、更に詳しくは缶胴
素材を円筒形にまるめ相互に対向する位置に置かれる1
対の縦線を重ね合はせて形成されるシームを溶接する工
程を備えた溶接缶の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing welded cans, and more particularly to a method for manufacturing welded cans, in which two can bodies are rolled into a cylindrical shape and placed in mutually opposing positions.
The present invention relates to a method for manufacturing a welded can, which includes a step of welding a seam formed by overlapping a pair of vertical lines.
従前技術とその問題点
特開昭57−56173号公報には、成形された素材の
1対の縦線を重ね合わせ溶接して製作される缶胴のシー
ムから押出された溶融物から成る「散り」と呼ばれる有
害な噴出物を防止するために、溶接作業に使用する電流
を低下するとき、製作された缶胴のシームが特に両端に
溶込み不足を発生させることが記載されている。重ね合
はせシームの溶接時に、溶接を開始する端部に発生する
溶込み不良の原因として、上下の電極ロールの隙間に突
然出入する多大な厚さの缶胴シームがこれらのロールを
上下に躍動させる。電極ワイヤの弛緩を起すなどが考え
られる。缶胴シーム端部の溶込み不良は、缶蓋巻締めに
必要なフランチを缶胴端部に形成するとき溶接部に割れ
を起し巻締完了後に洩れの原因になる。前記公開公報に
記載されている缶胴シームの溶接開始端における溶込み
不良を防止する方法は、シーム端部の溶接に使用する電
流を、シームの長さの中央部の溶接に使用する電流より
も大にすると言うものである。然しなから、上下の電極
間の溶接作業区域に次々に送9込まれる多数の缶胴につ
いて個々にシームの端部と中央部とで電流の大きさを変
えることは極めて煩雑な手続きである。実施例に示され
ている電流制御機構は決して簡単外ものではなく、かな
り高価なものと考えられる。従って1缶胴シームの重ね
合わせ溶接に起る一L述の欠陥を防止する簡便確実な方
法が望まれる。Prior art and its problems Japanese Patent Application Laid-Open No. 57-56173 describes a "splatter" made of molten material extruded from the seam of a can body manufactured by overlapping and welding a pair of vertical lines of molded material. It has been stated that when reducing the current used in the welding operation in order to prevent harmful ejecta called ``, the seams of the fabricated can bodies develop underpenetration, especially at the ends. When welding overlapping seams, poor penetration occurs at the end where welding begins, due to the large thickness of the can body seam that suddenly enters and exits the gap between the upper and lower electrode rolls. Make it lively. Possible causes include loosening of the electrode wire. Poor penetration of the seam end of the can body causes cracks in the weld when forming the flange necessary for seaming the can lid at the end of the can body, causing leakage after seaming is completed. The method for preventing poor penetration at the welding start end of a can body seam described in the above publication is to set the current used for welding the seam end to be lower than the current used for welding the center of the seam length. It is also said to make it bigger. However, it is a very complicated procedure to individually vary the magnitude of the current at the seam end and center for a large number of can bodies that are successively fed into the welding area between the upper and lower electrodes. The current control mechanism shown in the embodiment is by no means simple and is considered to be quite expensive. Therefore, there is a need for a simple and reliable method for preventing the defects mentioned above that occur during overlap welding of one can body seam.
発明の目的
本発明の目的は、双方の縦線を重ね合わせて形成される
缶胴のシームを溶接する際に起るシーム端部の溶込み不
良を防止する簡便にして確実な方法を得ることにある。OBJECT OF THE INVENTION An object of the present invention is to provide a simple and reliable method for preventing poor penetration of the seam end that occurs when welding the seam of a can body formed by overlapping both vertical lines. It is in.
本発明の以−にの目的は1円筒形にまるめられた缶胴素
材の相互に対向する1対の縦線を重ね合はせて形成され
るシームを溶接する工程を備えた缶の製造方法において
前記シームの厚さを少くとも一方の端部において低減さ
せることを特徴とする本発明の溶接缶の製造方法により
達成される。A further object of the present invention is to provide a method for manufacturing cans, which comprises a step of welding a seam formed by overlapping a pair of mutually opposing vertical lines of a can body material rolled into a cylindrical shape. This is achieved by the method for manufacturing a welded can of the present invention, characterized in that the thickness of the seam is reduced at least at one end.
発明の構成
本発明の方法の構成を添付図面に示す実施例について説
明すると次の如くである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the method of the present invention will be described below with reference to embodiments shown in the accompanying drawings.
第1及び2図は缶胴の重ね合はされたシーム12を溶接
する従前の工程を示すもので、それぞれ外周の溝に電極
ワイヤー5を嵌込ませた上下の電極ローラー3ab3b
の中間に位置するウェルディング・ステイション30に
差込まれた缶胴シーム12が示されている。缶胴シーム
12を構成する外側縦線11aと内側縦線11bとは右
端を同一鉛直線」−に揃えて上下に重ね合はされている
。第2図に示す如(、上部電極ロール3aは廻転軸4a
のまわりに反時計方向Aに、下部電極ロール3bは廻転
軸4bのまわりに時計方向Bに廻転してシーム12をP
方向に進行させ、内外の縦線11a。Figures 1 and 2 show the previous process of welding the overlapping seams 12 of the can body, in which upper and lower electrode rollers 3ab3b each have an electrode wire 5 fitted into a groove on the outer periphery.
The can body seam 12 is shown inserted into the welding station 30 located midway between the can body seam 12 and the welding station 30 . The outer vertical line 11a and the inner vertical line 11b constituting the can body seam 12 are vertically overlapped with their right ends aligned with the same vertical line. As shown in FIG. 2 (the upper electrode roll 3a is connected to the rotating shaft 4a
The lower electrode roll 3b rotates in the clockwise direction B around the rotation axis 4b to form the seam 12 in the counterclockwise direction A.
the inner and outer vertical lines 11a.
11bの間にナゲツ)13を形成する。5はガイド・ロ
ーラー6aから上部電極ロール3aの外周に導かれたの
ち電極ロール3aをほぼ一周して区域外に引出され、再
度ガイド・ローラー6bから下部電極ロール3bに導か
れたのち電極ロール3bの外周をほぼ一周する電極ワイ
ヤを示す。第1図に示す如く上下の電極ロール3a、3
bの間に形成される比較的小さな隙間から成るウェルデ
ィング・ステイション30にかなりの厚さを有する缶胴
シーム12が突然差込まれるときはそれぞれの電極ロー
ル3a% 3bが」1下に躍動させられることは避けら
れない。Nagetsu) 13 is formed between 11b. 5 is guided from the guide roller 6a to the outer periphery of the upper electrode roll 3a, goes around the electrode roll 3a almost once, is pulled out of the area, is guided again from the guide roller 6b to the lower electrode roll 3b, and then is removed from the electrode roll 3b. It shows an electrode wire that goes almost completely around the outer circumference of the . As shown in FIG. 1, upper and lower electrode rolls 3a, 3
When the can body seam 12 having a considerable thickness is suddenly inserted into the welding station 30 consisting of a relatively small gap formed between the electrode rolls 3a and 3b, the electrode rolls 3a and 3b move downward. It is inevitable that you will be forced to do so.
第3a図は上下電極ワイヤーに発生する延びとたるみと
を示す。かかる延び、fc、るみのほかに電極ロールの
ジャンピングのために起る通電不良と推定される溶接部
の溶込み不良がリード先端に発生する場合がある。FIG. 3a shows the elongation and slack that occur in the upper and lower electrode wires. In addition to such elongation, fc, and sag, poor penetration of the welded portion, which is presumed to be a current failure caused by jumping of the electrode roll, may occur at the lead tip.
第3b図は、従前の缶胴シームの先端12Bから所定の
距離tまでの区域14では溶接部に完全な溶込みが行わ
れていないことを示す。tの長さは伝速により差異があ
るカニ06〜1.0+amの範囲である。この区域の溶
込み不良は「lピッチの剥離」と呼ばれることがある。FIG. 3b shows that the weld is not fully penetrated in the area 14 from the tip 12B of the previous can body seam to a predetermined distance t. The length of t is in the range of 06 to 1.0+am, which varies depending on the transmission speed. Poor penetration in this area is sometimes referred to as "l pitch peeling."
第3c図は従前の方法により溶接された缶胴シームの端
部に起る溶込み不良のために1缶胴端部に缶蓋巻締用の
7ランヂを形成させる際に起る7ランヂ割れ17を示す
。フランヂ割れは完成後内容物を装填させた奥伝に缶漏
れを起す。Figure 3c shows 7-lunge cracking that occurs when forming 7-lunges for seaming the can lid at the end of one can body due to poor penetration that occurs at the end of the can body seam welded by the conventional method. 17 is shown. A cracked flange causes the can to leak after being loaded with contents after completion.
第4図は本発明の方法を示すもので、上下の電極ロール
3 a * 3 bの隙間に挿入される缶胴シーム2の
端部において、一方の側縁1aの端部を僅かに切除し、
他方の側縁1bのみを初めに前記隙間に挿入することを
特徴とする。側縁端部の切除は他方の側縁1bに行って
もよい〇
第5図(alは缶胴シーム2を外側から見た図で外側の
側縁1aが上端で細長い三角形に切除されている。FIG. 4 shows the method of the present invention, in which the end of one side edge 1a is slightly cut off at the end of the can body seam 2 to be inserted into the gap between the upper and lower electrode rolls 3a * 3b. ,
It is characterized in that only the other side edge 1b is inserted into the gap first. The cutting of the side edge end may be performed on the other side edge 1b. 〇Figure 5 (al is a view of the can body seam 2 seen from the outside, and the outer side edge 1a is cut into an elongated triangular shape at the upper end. .
第5図(blは缶胴ブランクlの隅角部から切除される
部分8の寸法の一例を示すものである。FIG. 5 (bl shows an example of the dimensions of the portion 8 cut out from the corner of the can body blank l.
切除部分8の高さ11
缶蓋巻締に必要なボディ・フック9(第6a図参照)の
高さの50%として上限を定め、1ピツチ剥離に対する
効果を考慮して下限を定めH−0,5〜10とした。Height 11 of the cut-out portion 8 The upper limit is set as 50% of the height of the body hook 9 (see Figure 6a) required for can lid seaming, and the lower limit is set in consideration of the effect on one pitch peeling H-0. , 5 to 10.
切除部分の幅W
WをI]に等しくするとフランチに亀裂が発生するから
WをI]より大にする必要がある、また電極ワイヤーの
プロファイル幅を考慮するとWは1.5酊以上は必要と
考えられる。また5Qill1以上の幅は不要であるか
らw = 1.5〜5.0酊とする。If the width W of the cut portion is equal to I, cracks will occur in the flange, so it is necessary to make W larger than I. Also, considering the profile width of the electrode wire, W needs to be 1.5 mm or more. Conceivable. Also, since a width of 5Qill1 or more is unnecessary, w = 1.5 to 5.0.
切除線18の角度θ
切除線18が缶端の水平線と成す角度は45以〜
下とすべきことが判明しているからθく35としたO
第6a図は溶接された缶胴10に缶蓋20を巻締めする
際に缶胴10の端部に形成されるボディ・フック9を示
すもので、ボディ・フック9の下縁に前記切除部分8が
示され、切除部分8の深さがボディ・フック9の深さの
%以下に成されている。Angle θ of the resection line 18 It is known that the angle between the resection line 18 and the horizontal line at the end of the can should be less than or equal to 45, so θ was set at 35. This figure shows the body hook 9 formed at the end of the can body 10 when the lid 20 is tightened, and the cutout part 8 is shown at the lower edge of the body hook 9, and the depth of the cutout part 8 is % or less of the depth of the body hook 9.
第6b図は缶胴10の」1端のボディ・フック9に缶蓋
20の外周の2重巻締め部分21を噛合はせた状態を示
す。FIG. 6b shows a state in which the double-sealed portion 21 on the outer periphery of the can lid 20 is engaged with the body hook 9 at one end of the can body 10.
発明の効果
本発明の効果は重ね合はせ溶接される缶胴シームの端部
において該シームの厚さを低減させることにより溶接開
始時の電極ロール及び電極ワイヤーの動揺を防止し確実
に溶接電流を印加することにより缶胴シームの端部に起
る溶込み不良を防止することである。Effects of the Invention The effects of the present invention are that by reducing the thickness of the seam at the end of the can body seam to be lap-welded, the electrode roll and electrode wire are prevented from shaking at the start of welding, and the welding current is reliably controlled. The purpose of this application is to prevent poor penetration that occurs at the end of the can body seam.
第1図は従前の方法を示す局部断面図。
第2図は従前の方法により溶接されたシームを示す概要
図。
第3a図は第2図の方法に起る電極ワイヤーの作動を示
す拡大図、
第3b図は第2図の方法に起る溶接結果を示す側面図。
第3c図は第2図の方法に起る溶接結果を示す斜視図。
第4図は本発明の方法を示す拡大詳細図、第5図は本発
明の方法により処理されるブランクを示す局部詳細図、
第6a図は第4図の方法により処理せられ後続工程で処
理される缶胴ケ示す側面図、
第6b図は缶蓋を取付けられた缶胴を示す詳細図。
l ブランク
Ia、lb 端縁
2 シーム
3a、3b 電極ロール
4a、4b 廻転軸
5 電極ワイヤー
6a、6b ガイド・ローラー
7 電極ワイヤーの弛緩部分8
切除部分
9 ボディ・フック
10 缶胴
11a、llb ブランクの従前の側縁12
従前のシーム
13 ナゲツト
14 溶込み不良部分
15 缶胴
16 フランチ
17 フランヂ割れ
18 切除線
20 缶蓋
21 巻締部分FIG. 1 is a partial sectional view showing a conventional method. FIG. 2 is a schematic diagram showing a seam welded by the conventional method. Figure 3a is an enlarged view showing the operation of the electrode wire that occurs in the method of Figure 2; Figure 3b is a side view showing the welding result that occurs in the method of Figure 2; FIG. 3c is a perspective view showing the welding result resulting from the method of FIG. 2; FIG. 4 is an enlarged detail showing the method of the invention; FIG. 5 is a local detail showing a blank processed by the method of the invention; FIG. 6a is a blank processed by the method of FIG. 4 and processed in subsequent steps. Fig. 6b is a detailed view showing the can body with the can lid attached; l Blank Ia, lb Edge 2 Seam 3a, 3b Electrode roll 4a, 4b Rotating shaft 5 Electrode wire 6a, 6b Guide roller 7 Loose part of electrode wire 8
Cutout portion 9 Body hook 10 Can body 11a, llb Former side edge 12 of blank
Previous seam 13 Nugget 14 Poor penetration part 15 Can body 16 Flange 17 Flange crack 18 Cut line 20 Can lid 21 Sealing part
Claims (3)
1対の縦線を重ね合はせて形成されるシームを溶接する
工程を備えた缶の製造方法において、前記シームの厚さ
を少くとも一方の端部において低減させることを特徴と
する溶接缶の製造方法(1) In a can manufacturing method comprising a step of welding a seam formed by overlapping a pair of mutually opposing vertical lines of a can body material rolled into a cylindrical shape, the thickness of the seam A method for producing a welded can, characterized by reducing the
の何れか一方の端縁を切除することを特徴とする特許請
求の範囲(1)に記載された溶接缶の製造方法(2) The method for manufacturing a welded can according to claim (1), characterized in that the edge of either the inner plate or the outer plate is cut off at the end of the seam.
材を薄肉化することを特徴とする特許請求の範囲(1)
に記載された溶接缶の製造方法。(3) Claim (1) characterized in that at least one material is thinned at the end of the seam.
The method for manufacturing a welded can described in .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15977586A JPS6316862A (en) | 1986-07-09 | 1986-07-09 | Manufacture of welded can |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15977586A JPS6316862A (en) | 1986-07-09 | 1986-07-09 | Manufacture of welded can |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6316862A true JPS6316862A (en) | 1988-01-23 |
Family
ID=15700990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15977586A Pending JPS6316862A (en) | 1986-07-09 | 1986-07-09 | Manufacture of welded can |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6316862A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5756173A (en) * | 1980-09-19 | 1982-04-03 | Daiwa Can Co Ltd | Electric resistance seaming and welding method of lateral joint of hollow cylindrical body |
JPS59174282A (en) * | 1983-03-18 | 1984-10-02 | Kumano Seikan Kk | Square can and its production |
-
1986
- 1986-07-09 JP JP15977586A patent/JPS6316862A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5756173A (en) * | 1980-09-19 | 1982-04-03 | Daiwa Can Co Ltd | Electric resistance seaming and welding method of lateral joint of hollow cylindrical body |
JPS59174282A (en) * | 1983-03-18 | 1984-10-02 | Kumano Seikan Kk | Square can and its production |
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