Electric heating – Metal heating – By arc
Patent
1976-06-09
1978-08-15
Truhe, J. V.
Electric heating
Metal heating
By arc
226 37, 226178, 21913771, B23K 912
Patent
active
041075080
ABSTRACT:
A method of and apparatus for automatic or semi-automatic welding or brazing wherein a fillet-wire, mechanically fed to the welding position on a work piece, is heated, along with the work piece, by a flame so that the fillet-wire reaches its melting point. A heating current is supplied to the fillet-wire to flow between the wire and the work piece. In order to maintain a predetermined relationship between the rate at which the fillet-wire is fed to the work piece and the rate at which the wire melts and separates to drop onto the work piece, the feed-rate and/or current intensity is regulated such that the wire is in constant contact with the work piece with a predetermined contact pressure. In one embodiment, the mechanical feeding device comprises a torque-limiting mechanism to maintain a substantially constant predetermined contact pressure of the fillet wire against the work piece. The torque-limiting mechanism may be of the slippage-type with two friction clutch-discs driven by a motor shaft, or it may be of the iron-powder type that is electrically operated.
REFERENCES:
patent: 3562577 (1971-02-01), Kensrue
patent: 3644701 (1972-02-01), Kobayashi et al.
patent: 3652819 (1972-03-01), Kerr et al.
Izumi Sachio
Kotani Tamotsu
L'Air Liquide Societe Anonyme pour l'Etude et, l'Exploitation de
Paschall M.
Robinson, Jr. Lee C.
Truhe J. V.
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