Y and T-finned tubes and methods and apparatus for their making

Details Y and T-finned tubes and methods and apparatus for their making Y and T-finned tubes and methods and apparatus for their making

1978-07-07

1979-12-25

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

With tool surface orbiting around axis parallel to direction...

72 98, 291573AH, 165184, B21H 300, B21D 5306

Patent

active

041799119

ABSTRACT:
This invention concerns finned tubes for use in heat exchanging whereby the fins have a generally T or Y shape. There is disclosed process and apparatus for making these Y and T-finned tubes whereby a smooth tube is subjected to conventional rolling process with the ends of the fins being subsequently notched into Y-fins and, if desired, subsequently flattened into T-fins. According to other embodiments of the invention the T-fins are constructed by an apparatus including an oblique surface which contacts the conventionally constructed fins causing the fins to be flattened into a general T shape.

REFERENCES:
patent: 3326283 (1967-06-01), Ware
patent: 3383892 (1968-05-01), Brothen
patent: 3753364 (1973-08-01), Runyan et al.
patent: 3768290 (1973-10-01), Zatell
patent: 3887004 (1975-06-01), Beck
patent: 4004441 (1977-01-01), Laszak

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