Welding device for studs of annular cross-section

To weld studs of essentially annular cross-section by arc welding according to the drawn-arc principle, a stud holder 1 is surrounded by an electromagnetic coil 5, the magnetic field of which is fed to the welding gap via a flux-directing part 6, 7 in such a way that a magnetic-field component runni...

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Bibliographische Detailangaben
Hauptverfasser:	MECKE, HUBERT, DR.., 39126 MAGDEBURG, DE, REITER, THOMAS.., 85221 DACHAU, DE, MUSIKOWSKI, HANS DIETER., 39128 MAGDEBURG, DE
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	To weld studs of essentially annular cross-section by arc welding according to the drawn-arc principle, a stud holder 1 is surrounded by an electromagnetic coil 5, the magnetic field of which is fed to the welding gap via a flux-directing part 6, 7 in such a way that a magnetic-field component running radially to the stud 4 is formed in the welding gap. This field component exerts a force acting on the arc in the peripheral direction so that the hollow stud 4 is reliably welded to the workpiece 2 over its entire annular cross-section. To minimize exciting of the workpiece 2 with the magnetic field produced by the coil 5, the flux-directing part is provided with a frustoconical field former 7, the extended generating line of which points to the weld location 8, so that the pole face 9 formed at the tip of the field former 7 narrowly encloses the welding gap.