Metal working – Method of mechanical manufacture – Heat exchanger or boiler making
Patent
1995-04-17
1997-12-02
Cuda, Irene
Metal working
Method of mechanical manufacture
Heat exchanger or boiler making
29890054, B23P 1500
Patent
active
056923007
ABSTRACT:
An improved method is provided for producing an aluminum tube of the type used as cooling tubes for heat exchangers, and particularly automotive heat exchangers. The method utilizes a flux-containing composition that can be selectively deposited in a manner that permits the manufacture of aluminum tubes having a lockseam construction. As a result, the method made possible by this invention provides for the manufacture of heat exchanger tubes that offer the weight, durability and safety advantages of aluminum alloy construction, but at lower investment, processing and material costs as compared to prior art welded aluminum tubes. Another advantage of the present method is that minimal amounts of braze alloy and flux are required, yet uniform and consistent brazed joints can be produced to yield leak-proof brazed assemblies.
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Conn Paul Joseph
Halstead Gary Asel
Cuda Irene
Hartman Domenica N. S.
Hartman Gary M.
S. A. Day Manufacturing Co., Inc.
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