Alcatel

Kabelmetal Electro Gesellschaft MIT Beschrankter Haftung

Siegfried Wandelt

Harry Staschewski

Ernst Hoffmann

A device for making metal tubing comprises a tube forming device for shaping a continuously conveyed metal band into an open seam tube and a welding device for welding the longitudinal seam of the tube. The welding device is a laser welding device with a welding head which is inclined at an angle with respect to the vertical. Disposed after the laser welding head is a radiation trap for trapping reflected laser beams. The radiation trap (3) is composed of a metallic housing with water-cooled walls and an inner surface which is blackened. The radiation trap (3) is arranged relative to the laser welding head (1) in such a way that the reflected laser beams (1b) are guided into the inside of the housing.

Laser beam welding device with radiation trap

A method for the continuous marking of elongated material (1) which is moved in its longitudinal direction, by which ring-shaped markings which are limited in axial direction are applied to the surface of the material (1) by means of ink jets (2). The ink jets (2) emerge under pressure from two nozzles (6, 7) which are arranged parallel to each other and swing continuously on a swing shaft (5). If only one nozzle (6) is to function, the other nozzle (7) is closed by a 3/2-way valve (20). At the same time, a bypass (18) is opened through which the quantity of ink intended for the disconnected nozzle (7) is conducted away. The ink jet (2) of the still functioning nozzle (6) is then retained without change.

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Langenhagen, Germany

Siegfried Wandelt