B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
B21C37/12—Making tubes or metal hoses with helically arranged seams
B21C37/124—Making tubes or metal hoses with helically arranged seams the tubes having a special shape, e.g. with corrugated wall, flexible tubes
Landscapes
Engineering & Computer Science
(AREA)
Mechanical Engineering
(AREA)
Making Paper Articles
(AREA)
Shaping Of Tube Ends By Bending Or Straightening
(AREA)
Procede et machine pour l'enroulement d'un element filaire autour d'une piece pour le frettage, l'enroulement filamentaire ou le marouflage
Procédé et machine de fabrication d'une isolation thermique multicouche autour et le long d'une traversée solide, et resérvoir cryogénique correspondant
Procédé pour former un filet hélicoïdal dans la surface d'un cylindre allongé en matière thermoplastique et appareil pour la mise en oeuvre de ce procédé