B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
Dispositif a rouleaux de cintrage pour l'ecrouissage de produits metalliques, notamment de fils d'acier, et machine comportant un tel dispositif
Machine permettant de faire pivoter autour de leur axe des tubes de section rectangulaire ou carree de poids eleve et de grandes dimensions,en vue de leur usinage.