DE409418C - Process for electric seam welding - Google Patents

Process for electric seam welding

Info

Publication number
DE409418C
DE409418C DESCH68755D DESC068755D DE409418C DE 409418 C DE409418 C DE 409418C DE SCH68755 D DESCH68755 D DE SCH68755D DE SC068755 D DESC068755 D DE SC068755D DE 409418 C DE409418 C DE 409418C
Authority
DE
Germany
Prior art keywords
electrode
arc
seam
seam welding
electric
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
DESCH68755D
Other languages
German (de)
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.)
Individual
Original Assignee
Individual
Publication date
Priority to DESCH68755D priority Critical patent/DE409418C/en
Application granted granted Critical
Publication of DE409418C publication Critical patent/DE409418C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0205—Non-consumable electrodes; C-electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/02—Seam welding; Backing means; Inserts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Schweißen mittels elektrischen Lichtbogens. Es ist für solche Schweißungen bestimmt, bei welchen der Schluß der Schweißfuge durch Zusammenschmelzen der Nahtränder ohne Verwendung eines besonderen Schweißmaterials durch eine abschmelzende Elektrode erfolgt. The invention relates to a method for welding by means of an electric arc. It is intended for those welds in which the closure of the weld joint occurs Fusion of the seam edges without using a special welding material is carried out by a melting electrode.

Es ist bei Verwendung einer abschmelzenden Elektrode schwierig oder unmöglich, selbsttätig arbeitende Maschinen, z. B. Naht-Schweißmaschinen, zu bauen, denn die Konstanthaltung der Lichtbogenlänge wird schon durch kleine Unregelmäßigeiten im Abschmelzgang der Elektrode verhindert.It is difficult or impossible when using a consumable electrode to automatic machines, e.g. B. seam welding machines to build, because the constant maintenance the arc length is already prevented by small irregularities in the melting path of the electrode.

Man kann nun den, Lichtbogen zwischen einer nicht abschmelzenden, also kalten Elektrode und der schmelzflüssigen Schweißzone erzeugen und halten, wenn die Schmelzzone Kathode ist. Die Schwierigkeiten, die durch den Abschmelzvorgang einer abschmelzenden Elektrode verursacht werden, fallen dann fort. Aber das Verfahren ist dann auf die Verwendung von Gleichstrom beschrankt. Nach der Erfindung wird wie folgt gearbeitet: Die nicht abschmelzende Elektrode besteht aus einem nicht oxydierbaren, schlechten Wärmeleiter, z. B. Siliciumcarbid. Sie ist als sich drehende Scheibe gestaltet, die nach der Zeichnung, die als Beispiel das Schließen einer Rohrlängsnaht schematisch im Querschnitt zeigt, mit ihrer balligen Umfangsflache der Naht gegenübersteht.You can now create the arc between a non-melting, i.e. cold electrode and create and hold the molten weld zone when the melt zone is cathode. The difficulties caused by the melting process of a consumable electrode are then eliminated. But the method is then limited to the use of direct current. According to the invention, the procedure is as follows: The electrode that does not melt consists of a non-oxidizable, poor heat conductor, e.g. B. silicon carbide. she is designed as a rotating disc, which according to the drawing, which is closing as an example shows a pipe longitudinal seam schematically in cross section, with its spherical circumferential surface facing the seam.

Die Drehung der Elektrode wird nun so abgestimmt, daß sie eine für die Aufrechterhaltung des Lichtbogens nötige Temperatur auf ihrem ganzen Umfange annimmt, so daß der Lichtbogen auch dann nicht verlöscht, wenn die Elektrode Kathode ist. Die Drehung erfolgt aber so schnell und die Masse der Elektrode ist so bemessen, daß auch wieder die Temperatur über dieses nötige Maß nicht hinausgeht und ein Schmelzen der Elektrode nicht erfolgt.The rotation of the electrode is now tuned so that it is one for the maintenance of the arc assumes the necessary temperature over its entire circumference, so that the arc does not extinguish even then, when the electrode is cathode. The rotation is so fast and the mass of the The electrode is dimensioned in such a way that the temperature again does not exceed this necessary level and the electrode does not melt.

Der Lichtbogen kann nun also auch mit Wechselstrom arbeiten. In der Zeichnung ist E die Elektrode, die durch ihre Wellenlager oder durch Schleifringe an einem Pol der Stromquelle liegt, während die die Naht zusammenpressenden und das Rohr/? fortbewegenden Druckrollen D am anderen Pol liegen.The arc can now also work with alternating current. In the drawing, E is the electrode that is connected to a pole of the power source through its shaft bearings or slip rings, while those that compress the seam and the tube /? moving pressure rollers D are on the other pole.

Beim Anlassen erhält die Elektrode zunächst eine langsame Drehung, deren Geschwindigkeit dann bis zur Betriebsgeschwindigkeit gesteigert wird.When starting, the electrode initially rotates slowly, its speed then increased to operating speed.

Claims (1)

Patent-Anspruch :Patent claim: Verfahittenzum !elektrischen Naht-Schweißen, bei welchem der Schluß der Naht -durch Zusammenschmelzen der Nahtränder mittels des elektrischen Lichtbogens erfolgt, gekennzeichnet durch die Verwendung einer Elektrode, bestehend aus einer sich drehenden Scheibe- aus einem Leiter zweiter Klasse (Karborund, Silit o. dgl.), die ihrer Masse nach so bemessen ist und deren Drehung derart erfolgt, daß ihre den Lichtbogen tragende Umfangsfläche unter der Schmelztemperatur bleibt, aber sio heiß gehalten wird, daß der Lichtbogen auch erhalten bleibt, wenn die Elektrode Kathode ist.Process for! Electric seam welding, at which the end of the seam - by melting the seam edges together takes place by means of the electric arc, characterized by the use an electrode, consisting of a rotating disc made of a second class conductor (carborundum, silicon or the like), which is dimensioned according to its mass and its rotation takes place in such a way that its circumferential surface carrying the arc remains below the melting temperature, but is kept sio hot that the arc is retained even when the electrode is a cathode.
DESCH68755D Process for electric seam welding Expired DE409418C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DESCH68755D DE409418C (en) Process for electric seam welding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH68755D DE409418C (en) Process for electric seam welding

Publications (1)

Publication Number Publication Date
DE409418C true DE409418C (en) 1925-09-21

Family

ID=7439493

Family Applications (1)

Application Number Title Priority Date Filing Date
DESCH68755D Expired DE409418C (en) Process for electric seam welding

Country Status (1)

Country Link
DE (1) DE409418C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022736A1 (en) * 1979-07-11 1981-01-21 Ugine Savoie Process for shielding-gas electric-arc welding of steel, and its use
DE3106894A1 (en) * 1981-02-24 1982-09-16 Vsesojuznyj naučno-issledovatel'skij institut Metiznoj promyšlennosti VNIIMETIZ, Magnitogorsk, Čeljabinskaja oblast' Device for the electric-arc treatment of long workpieces

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0022736A1 (en) * 1979-07-11 1981-01-21 Ugine Savoie Process for shielding-gas electric-arc welding of steel, and its use
FR2460741A1 (en) * 1979-07-11 1981-01-30 Ugine Aciers IMPROVED PROCESS FOR WELDING ELECTRIC ARC STEEL WITH PROTECTIVE GAS
DE3106894A1 (en) * 1981-02-24 1982-09-16 Vsesojuznyj naučno-issledovatel'skij institut Metiznoj promyšlennosti VNIIMETIZ, Magnitogorsk, Čeljabinskaja oblast' Device for the electric-arc treatment of long workpieces

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