Process for the continuous production of longitudinally seam-welded and corrugated metal tubes
AssigneeNexans
InventorsChristian Frohne, Ernst Hoffmann, Wolfram Klebl, Dieter Muller
Life of this patent
Estimating the term…
Abstract
In a process for the continuous production of longitudinally seam-welded and corrugated metal tubes (46), a metal band drawn off from a supply reel is formed into an open-seam tube, welded at its longitudinal edges, and the welded smooth tube (45) corrugated. A withdrawal apparatus driven by an electric motor engages the smooth tube. The smooth tube (45) is corrugated by means of a corrugation plate (43) located in a corrugation head (42) which can be driven rotationally. The corrugation head (42) is driven directly by a hollow shaft motor (37, 38).
Claims15
A process for the continuous production of longitudinally seam-welded and corrugated metal tubes, the method comprising the steps of forming a metal band drawn off from a supply reel into an open-seam tube, welding the tube at its longitudinal edges, and corrugating the welded smooth tube by engaging the smooth tube by a withdrawal apparatus driven by an electric motor and corrugating the smooth tube by means of a corrugation plate located in a rotationally driven corrugation head, said method characterized by the fact that the corrugation head is driven directly by a hollow shaft motor.
A process according to claim, wherein an axial force acting on a fixed point due to the displacement of the rotor or carriage is measured.
An apparatus for the continuous for the continuous production of longitudinally seam-welded and corrugated metal tubes, said apparatus comprising a supply reel for a metal band, a forming apparatus forming the metal band into an open-seam tube, a welding apparatus welding the open seam of the open-seam tube, a withdrawal apparatus driven by an electric motor and engaging the welded metal tube, and a corrugation apparatus which has a rotationally driven corrugation head with a corrugation plate, located in the interior of the corrugation head, which forms the corrugation in the smooth tube, wherein said corrugation head is driven by a hollow shaft motor rotor formed as a tube.
Dependencies are inferred from the claim text.