Title:
PIPE WITH FINS
Document Type and Number:
Japanese Patent JPS5328070
Kind Code:
A
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.
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Inventors:
HEKUTAA TOOMASU
Application Number:
JP9471177A
Publication Date:
March 15, 1978
Filing Date:
August 09, 1977
Export Citation:
Assignee:
HEAT EXCHANGERS AFRICA
International Classes:
B21H3/00; B21C37/15; B21C37/20; F28F1/36; (IPC1-7): B21D53/06; F16L9/02; F28F1/00; F28F1/10