METHOD AND DEVICE FOR CONNECTING THE ENDS OF STEEL TUBES BY MEANS OF ORBITAL WELDING USING A HYBRID TECHNIQUE

摘要

The invention relates to a method for connecting the ends of steel tubes bymeans oforbital welding using a hybrid laser arc technique, with the tubes preferablyhavingwall thicknesses = 6 mm and more particularly = 12 mm anddiameters of preferably= 150 mm, the ends of which tubes are connected by one or more weldingpasses,wherein the laser and arc welding heads as tools are guided over a guide ringfixedlyarranged around a tube end in the region of the weld site during the weldingand aredisplaced around the tube diameter. The invention also relates to a device forcarrying out the method, wherein the laser and the arc welding heads arepositionedseparately on the guide ring and are moved over the tube circumference andcontrolled independently of one another during the welding process.