Apparatus for forming serpentine heat exchangers

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

1976-04-15

1977-09-20

Keenan, Michael J.

Metal deforming

By use of non-deforming work-gripping clamp and relatively...

With cutting

72307, 72DIG16, 291573A, 113118V, B21D 1107, B21D 5306

Patent

active

040488349

ABSTRACT:
A machine for forming a serpentine heat exchanger having a predetermined length from a continuously formed spine fin 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 with the longitudinal axis of the tube and perpendicular to the central axis. 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.

REFERENCES:
patent: 370652 (1887-09-01), Phillips
patent: 2453868 (1948-11-01), Shaw, Jr.
patent: 2814327 (1957-11-01), Charlton
patent: 2882953 (1959-04-01), Huet
patent: 3240048 (1966-03-01), Callendar
patent: 3475938 (1969-11-01), Whitney, Jr.
patent: 3680347 (1972-08-01), Schenck
patent: 3722251 (1973-03-01), Withrow
patent: 3733885 (1973-05-01), Brauer
patent: 3742749 (1973-07-01), Bondarenko et al.
patent: 3762196 (1973-10-01), Kempken

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