Finned tubing

Details Finned tubing Finned tubing

1977-07-27

1978-07-18

Larson, Lowell A.

Metal deforming

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

During rotation of work

291573AH, B21H 312

Patent

active

041007840

ABSTRACT:
This invention provides for a method of and apparatus for the manufacture of finned tubing, more particularly high-fin tubing, from tubular metal fin stock on a tube liner by means of a plurality of rollers rotatably drivable by means of arbors and each roller including a plurality of axially arranged forming discs. At least some of the discs have recessed cross-sectional profiles including radially extending recessed portions radially spaced from the disc peripheries so that when these discs are forced into the metal fin stock the fin stock is only in partial contact with the discs during the formation of the fin and is not in contact over the recessed portions.

REFERENCES:
patent: 3648502 (1972-03-01), Klug et al.
patent: 3745801 (1973-07-01), Kallfelz et al.

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