Method and device for the manufacture of cylindrical tubular elements, such as the body of the cylinder and cylindrical tubular elements obtained according to this

摘要

The present invention relates to a method and a device for producing a cylindrical tubular element forming a barrel drum having at least one set of beads and tubular element thus produced. According to the invention, the set of beads (20a, 20b) is formed in a single operation by rolling, positioning a counter-roller against one of the faces of the wall of the tubular element (11) and bringing a roller to bear progressively on the opposite face of the said wall and facing the counter-roller, up to a working position which defines an acute angle with the axis of the said counter-roller, so that the beads have an amplitude which increases progressively from one of the ends of the cylindrical tubular element (11). IMAGE