Apparatus for forming serpentine heat exchangers

Details Apparatus for forming serpentine heat exchangers Apparatus for forming serpentine heat exchangers

B - Operations, Transporting

21

D

26/145

B21D 11/07 (2006.01) B21D 7/08 (2006.01)

Patent

CA 1077690

ABSTRACT OF THE DISCLOSURE A machine for forming a serpentine heat exchanger having a predetermined length from a continuously formed spine fine tubing. A supply of continuously formed spine fin tubing is directed to a forming and bending head in predetermined increments where it is bent in alternate directions about a central axis to form the serpentine heat exchanger. Prior to the bending action the portion to be bent is deformed into a cross section having its major axis parallel to the plane of the tube. The following bending operation causes the tube diameter across the major axis to decrease as the wall in the area of the outer curve migrates radially inwardly due to its failure to elongate sufficiently, in effect, the cross sectional area in the completed bent portion is substantially equal to the cross sectional area of the tube before the deforming and bending operation.

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