Electric heating – Metal heating – By arc
Patent
1981-04-09
1983-12-20
Shaw, C. C.
Electric heating
Metal heating
By arc
21913051, B23K 909
Patent
active
044219725
ABSTRACT:
A method of arc welding is disclosed. Specifically, a method of pulsed direct current (DC) arc welding is disclosed wherein special pulses of positive direct current are used to weld together work pieces. The special DC pulses are capable of dissipating difficult to reduce oxides which may be present on the surfaces of the work pieces without using a flux. The method is especially useful for fluxless arc welding of aluminum, particularly thin wall aluminum tubing used in making heat exchangers for air conditioning systems.
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Duncan John R.
Moyer Ross A.
Rohrberg Roderick G.
Wright, Sr. William E.
Adour David L.
Carrier Corporation
Shaw C. C.
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