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
B21C37/15—Making tubes of special shape; Making tube fittings
B21C37/22—Making finned or ribbed tubes by fixing strip or like material to tubes
B21C37/24—Making finned or ribbed tubes by fixing strip or like material to tubes annularly-ribbed tubes
Procede de filage a chaud pour realiser une piece metallique, outil de filage pour sa mise en oeuvre et tige de train d'atterrissage ainsi realisee
Procédé pour fabriquer des corps creux en agrégat avec armature métallique, machine pour la mise en oeuvre de ce procédé et corps creux obtenu par ce procédé.