Metal fusion bonding – Process – With shaping
Patent
1982-12-01
1985-05-07
Ramsey, Kenneth J.
Metal fusion bonding
Process
With shaping
228183, 228265, B23K 118
Patent
active
045153051
ABSTRACT:
A connection of the tubular ends of conduits or flow profiles which are associated with a cross-countercurrent matrix of a heat exchanger, and which are internally streamed through by a relatively cool gas (compressed air), to a suitably preperforated heat exchanger bottom of one or more manifolds formed for, respectively, the infeed or discharge of compressed air into or from the applicable heat exchanger matrix. In particular, the invention pertains to a method for the manufacture of such a connection. The respective tubular end is deformed by swaging, forging or similar forming around a mandrel and, subsequent to calibration of the outer contour, is externally coated with a brazing alloy, after which the thus prepared tube end is inserted, together with the mandrel, into the associated opening in the heat exchanger bottom and pressed against the adjacent wall of the opening and along its rim as the mandrel being drawn through, subsequent to which localized heating is employed to produce metallurgical connection between the tube end and the respective portion of the heat exchanger bottom.
REFERENCES:
patent: 2545527 (1951-03-01), Maxwell
patent: 4002285 (1977-01-01), Wendt
MTU Motoren-und Turbinen-Union Munchen GmbH
Ramsey Kenneth J.
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