DE813925C - Process for covering and strengthening overlapped welded longitudinal seams on the ends of black metal cans - Google Patents

Process for covering and strengthening overlapped welded longitudinal seams on the ends of black metal cans

Info

Publication number
DE813925C
DE813925C DE1949P0037898 DEP0037898D DE813925C DE 813925 C DE813925 C DE 813925C DE 1949P0037898 DE1949P0037898 DE 1949P0037898 DE P0037898 D DEP0037898 D DE P0037898D DE 813925 C DE813925 C DE 813925C
Authority
DE
Germany
Prior art keywords
seam
covering
strengthening
metal cans
longitudinal seams
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
Application number
DE1949P0037898
Other languages
German (de)
Inventor
Eugen Dipl-Ing Doerr
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.)
Blechwarenwerke Schmalbach J A
Original Assignee
Blechwarenwerke Schmalbach J A
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 Blechwarenwerke Schmalbach J A filed Critical Blechwarenwerke Schmalbach J A
Priority to DE1949P0037898 priority Critical patent/DE813925C/en
Application granted granted Critical
Publication of DE813925C publication Critical patent/DE813925C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K33/00Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)

Description

Schwarzblechdosen mit geschweißter Längsnaht weisen den Nachteil auf, daß die fertige Schweißnaht die Oberflächengestaltung der Dose, insbesondere ihren Überzug, dessen Farbgebung, Beschriftung, Verzierung o. dgl. in unerwünschter Weise unterbricht, weil für den Schweißvorgang das Aufeinanderliegen blanker Metallflächen ein unbedingtes Erfordernis ist. Außerdem wird der Oberflächenschutz der. Dose auch noch in größerer Entfernung von der Schweißnaht durch die bei dem Schweißen auftretende hohe Temperatur verfärbt oder gar verbrannt.Black metal cans with welded longitudinal seams have the disadvantage that the finished weld seam the surface design of the can, especially theirs Coating, its coloring, lettering, decoration or the like in an undesirable manner interrupts, because for the welding process the bare metal surfaces lie on top of one another is an absolute requirement. In addition, the surface protection of the. Can too even at a greater distance from the weld seam due to the welding seam discolored or even burned at high temperature.

Um diese Nachteile zu beseitigen und obendrein die Längsnaht der Dose auch noch wesentlich zu verfestigen, sie also noch stabiler zu machen, wird die Längsnaht gemäß der Erfindung nach dem Schweißen um ihre mittlere Längsachse um 18o° in Richtung gegen die freien Blechränder gedreht und in eine Hakenfalznaht umgeformt.In order to eliminate these disadvantages and on top of that the longitudinal seam of the can also to consolidate it significantly, i.e. to make it even more stable, will be the Longitudinal seam according to the invention after welding around its central longitudinal axis Turned 180 ° towards the free sheet metal edges and into a hook seam reshaped.

Durch das neue Verfahren wird ein weiterer erheblicher Nachteil von Dosenrümpfen mit überlappt geschweißter Längsnaht beseitigt. Bei demSchweißen der zur Bildung einer Längsnaht dienenden, überlappt aufeinandergelegten Ränder von Schwarz-,blechdosen entsteht infolge von Wärmestauungen in der Naht stets ein Rumpf, dessen geschweißte Längsnaht sattelförmig durchgebogen ist. Durch das Verdrehen der Schweißnaht um seine mittlere Längsachse wird diese Verformung aufgehoben bzw. durch die Verfalzung verdeckt.The new process has another significant disadvantage of Can bodies with overlapped welded longitudinal seams eliminated. When welding the to form a longitudinal seam, overlapping edges of Black and tin cans always have a body due to heat build-up in the seam, whose welded longitudinal seam is bent in the shape of a saddle. By twisting the weld seam around its central longitudinal axis, this deformation is canceled or covered by the interlocking.

Für die nach diesem Verfahren hergestellte Längsnaht werden die Blechränder a, b eines Rumpfes c zunächst überlappt aufeinandergelegt, wie dies Fig. i zeigt. Sodann erfolgt die Verschweißung an den Flächen d, e und schließlich eine Verdrehung der Schweißnaht um die senkrechte Achse f in Richtung der eingezeichneten Pfeile.x um einen Winkelbetrag von i8o°, so daß die Hakenschweißfalznaht nach Fig. a entsteht. Bei dieser Schweißfalznaht liegt im Innern die Schweißnaht d, e, die auf beiden Seiten durch Teile g, h des Rumpfes c eingeschlossen sind und dadurch nicht nur eine ganz erhebliche Verfestigung der Längsnaht, sondern auch eine sichere Abdeckung der Schweißnaht ergeben, ohne daß es nötig wäre, die Naht noch durch Lackierung o. dgl. innen und außen besonders nachzubehandeln. Außerdem wird durch die Abdeckung der Schweißnaht vermieden, daß Teile der Naht (Schweißspritzer) in das Füllgut gelangen oder dieses mit der Schweißnaht in Berührung kommt.For the longitudinal seam produced by this method, the sheet metal edges a, b of a body c are initially placed on top of one another in an overlapping manner, as shown in FIG. The welding is then carried out on the surfaces d, e and finally the weld seam is rotated about the vertical axis f in the direction of the arrows.x drawn by an angle of 180 °, so that the hook weld seam according to FIG. The inside of this weld seam is the weld d, e, which are enclosed on both sides by parts g, h of the fuselage c and thereby result not only in a very substantial strengthening of the longitudinal seam but also in a secure covering of the weld seam without the need for it would be to post-treat the seam especially by painting or the like inside and outside. In addition, the covering of the weld seam prevents parts of the seam (weld spatter) from getting into the filling material or from coming into contact with the weld seam.

Gegenüber einfachen Falznahtdosen weist die neue Naht den Vorteil einer billigeren, besseren und zuverlässigeren Dichtung auf, die auch bei Knickbeanspruchungen des Rumpfes nicht versagt.Compared to simple seam cans, the new seam has the advantage a cheaper, better and more reliable seal, which also with buckling loads of the trunk does not fail.

Claims (1)

PATENTANSPRUCH: Verfahren zum Abdecken und Verfestigen von überlappt geschweißten Längsnähten an Rümpfen von Schwarzblechdosen, dadurch gekennzeichnet, daß die Längsnaht nach dem Schweißen um ihre mittlere Längsachse um i8o° in Richtung gegen die freien Blechränder (a, b) gedreht und in eine Hakenfalznaht umgeformt wird. PATENT CLAIM: A method for covering and strengthening overlapping welded longitudinal seams on the bodies of black metal cans, characterized in that the longitudinal seam is rotated after welding around its central longitudinal axis by 180 ° in the direction towards the free sheet metal edges (a, b) and formed into a hook seam .
DE1949P0037898 1949-03-26 1949-03-26 Process for covering and strengthening overlapped welded longitudinal seams on the ends of black metal cans Expired DE813925C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1949P0037898 DE813925C (en) 1949-03-26 1949-03-26 Process for covering and strengthening overlapped welded longitudinal seams on the ends of black metal cans

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1949P0037898 DE813925C (en) 1949-03-26 1949-03-26 Process for covering and strengthening overlapped welded longitudinal seams on the ends of black metal cans

Publications (1)

Publication Number Publication Date
DE813925C true DE813925C (en) 1951-09-17

Family

ID=578608

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1949P0037898 Expired DE813925C (en) 1949-03-26 1949-03-26 Process for covering and strengthening overlapped welded longitudinal seams on the ends of black metal cans

Country Status (1)

Country Link
DE (1) DE813925C (en)

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