Ultrasonic soldering process
AssigneeFedders Corporation
InventorsCharles Louis Osterkorn, Salvatore M. Marino
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Abstract
A series of thin-walled, heat exchange tubes are soldered to return bends of similar materials so as to complete a flow path through the tube bundle by a process which comprises press-fitting the return bends to the tubes, preheating the return bends and portions of the tube adjacent the bends to a temperature, the average of which is approximately the soldering temperature, soaking the preheated portion in a liquid which will equalize the temperature of the various preheated portions, and ultrasonically soldering the return bends to the tubes.
Claims6
A process for ultrasonically soldering thin-wall metal tube bundles consisting of straight tubular sections and return tubular sections, the method comprising:
- a. fitting said return bends to said straight tubes;
- b. preheating the return bends and adjacent portions of the straight tubes to an average temperature approximating the temperature to be employed in ultrasonic soldering;
- c. soaking said preheated tube bundle portion in a heat transfer liquid so as to equalize the temperature of said portion;
- and
- d. ultrasonically soldering said return bends to said straight tube sections.
Dependencies are inferred from the claim text.