Vorrichtung zum Verschweissen eines Gurts und eines Stegs, insbesondere zu einem T- oder I-Stoss, mit Hochenergiestrahlung

Device for the welding of a belt (10) or a web (11) to a T joint or similar using high-energy radiation (15), in particular using laser radiation, using light from the detector (1,2) detecting the welding area to which radiation has been applied. In order to enhance a device possessing the characteristics named above in order to facilitate monitoring of the welding operation for the purposes of quality assurance and in particular to permit a simplified alignment of the welding head relative to the welding point, said device is designed so that a first and a second detector (1,2) are arranged each on one side (13,14) of the web (11), the radiation (15) impinges on the belt wall (16) opposite to the web (11), and a control unit is provided to adjust the beam spot (17) of the radiation (15) on the belt (10) transverse to the opposite web (11) in dependence of detector signals.