Process for producing corrugated tube and product produced...

Details Process for producing corrugated tube and product produced... Process for producing corrugated tube and product produced...

B - Operations, Transporting

21

C

B21C 37/06 (2006.01) B21C 37/08 (2006.01) B21C 37/16 (2006.01) B21C 37/20 (2006.01) B23K 9/032 (2006.01) B23K 26/08 (2006.01) H01B 13/26 (2006.01)

Patent

CA 2128166

ABSTRACT OF THE DISCLOSURE In a process for producing a helically or annularly corrugated metal tube and the product produced thereby, a metal band is drawn from a storage spool and formed into a longitudinal slit tube, the slit tube is welded longitudinally as by laser or TIG pulse welding and formed with a helical or annular corrugation by an annular corrugation tool operating eccentrically around the tube axis. The product is produced with a ratio of over Image of outside diameter D to wall thickness s and the corrugation has a ratio of less than Image of corrugation pitch T or Tp to corrugation depth t.

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