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 by means of orbital welding using a hybrid laser arc technique, said tubes preferably having wall thicknesses = 6 mm and more particularly = 12 mm and diameters of preferably = 150 mm, the ends of which tubes are connected by one or more welding passes, wherein the laser and arc welding heads as tools are guided over a guide ring fixedly arranged around a tube end in the region of the weld site during the welding and are displaced around the tube diameter. The invention also relates to a device for carrying out the method, wherein the laser and the arc welding heads are positioned separately on the guide ring and are controlled and displaced over the tube circumference independently of one another during the welding process.