METHOD OF FABRICATING A HEAT EXCHANGER

摘要

A heat exchanger and a method of making a heat exchanger comprising an elongated integral metal tank-header with spaced tubes interfitted in openings formed by displacing metal of the header portion to form flanges. The flanges are bonded to the tube ends and the tank-header before and after the bonding has a curved cross section including the flange areas. The method of forming the heat exchanger in which an integral metal tank-header is provided of rounded externally convex cross section including a longitudinal portion comprising an elongated convex header, providing spaced openings in this header each defined by a flange of metal displaced from the header in forming the opening and each flange having a curved bonding surface bonding the end of the tube in each opening with bonding material located between the tubes and the surface on the corresponding flange and then reshaping the tank-header after the bonding.