B - Operations – Transporting – 23 – P
Patent
B - Operations, Transporting
23
P
26/146
B23P 15/26 (2006.01) B21C 37/20 (2006.01) B21D 26/02 (2006.01) B21D 53/02 (2006.01) B21D 53/06 (2006.01)
Patent
CA 1094787
ABSTRACT OF THE DISCLOSURE A method of forming helically finned pipes involves, after fin formation and an initial pipe relaxation, a bending of the fin in one direc- tion and then the other out of a plane perpendicular to a rolling axis, and straightening the fin thereafter. When forming a fin on duplex metal pipes, the outside pipe is additionally compressed onto the core pipe. A tool for performing the method is equipped with a disk section for bending the formed fin, consisting of a thrust disk and a straightening disk, between which is placed at least one compressing disk when rolling a duplex metal pipe.
294977
Bodynek Pawel
Gozdziewicz Zygmunt
Maczynski Andrzej
Pieczyk Jozef
Przybyla Janusz
Fetherstonhaugh & Co.
Zaklad Doswiadczalny Przy Zakladach Urzadzen Chemicznych "metalc
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