Process and device for the manufacturing of continuously welded metal tubes such as flux-cored welding wires

摘要

Method for manufacturing a welded tube from a metallic sheet successively formed in a U, then O shape in such a way that two longitudinal borders get progressively closer to one another is claimed. The two borders are welded together by at least one laser beam in which the axe of the beam and the longitudinal axe of the tube form an angle inferior to 15 degrees. The axe of the beam and the axe of the tube are parallel.