Electric heating – Metal heating – Of cylinders
Patent
1994-12-09
1996-10-22
Walberg, Teresa J.
Electric heating
Metal heating
Of cylinders
219 613, 219 591, B23K 11087, B23K 1302, B23K 2602
Patent
active
055673350
ABSTRACT:
Sheet metal edges to be welded are preheated prior to welding. At a given welding speed, this results in a smaller temperature gradient in the material to be welded. Consequently the welding speed can be increased, or material which would otherwise provide poor weld quality can be welded at a high temperature gradient. The preheating is carried out for example by high-frequency excitation of the material to be welded.
REFERENCES:
patent: 3944782 (1976-03-01), Metcalfe et al.
patent: 4354090 (1982-10-01), Nilsen
patent: 4577088 (1986-03-01), Sharp
patent: 4771931 (1988-09-01), Matsui et al.
patent: 5140123 (1992-08-01), Mitani
patent: 5158227 (1992-10-01), Esson
Technische Mitteilungen AEG Telefunken, Bd. 63, Nr. 3, 1973, Jurt Flick, "Hochfrequenz-Erwarmungsanlage zum induktiven Langsnahtachweissen von Rohren".
Baessler Peter
Marriott Alan
Maurer Urs
Oberholzer Marcel
Elpatronic AG
Pelham J.
Walberg Teresa J.
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