Electric heating – Metal heating – By arc
Patent
1981-04-09
1983-09-06
Shaw, C. C.
Electric heating
Metal heating
By arc
21913021, 21913051, B23K 909
Patent
active
044031351
ABSTRACT:
A method of arc welding is disclosed. Specifically, a method of pulsed DC arc welding is disclosed wherein the pulse width of the current pulses are modulated to maintain a constant time averaged power flow to the work pieces being welded. This method of arc welding is especially useful with a type of pulsed DC arc welding wherein the ratio of peak current to maintenance current is maintained at a selected high value and the current is cycled in a time duration whereby oxides on the surface of the work pieces are dissipated as the weld is made. When used with this type of pulsed DC arc welding the present method is especially suited for fluxless welding of aluminum work pieces, such as thin wall aluminum tubing used in making heat exchangers for air conditioning systems.
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Jackson Dale E.
Moyer Ross A.
Adour David L.
Carrier Corporation
Daley Donald F.
Shaw C. C.
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