DEVICE AND METHOD FOR LASER WELDING USING A FILLER MATERIAL IN THE FORM OF A WELDING WIRE, AND CONTROL PROGRAM FOR CARRYING OUT SAID METHOD

The invention relates to a device (3) for laser welding using a filler material in the form of a welding wire (11), having a welding head (9), a wire guide (17) for the welding wire (11), and a wire feed drive (20). The welding wire (11) can be moved by means of the wire feed drive (20) during a welding process relative to the wire guide (17) with a feed movement in a feed direction (16) extendingin the longitudinal direction of the wire. During the feed movement, the welding wire (11) is guided by means of the wire guide (17) in the feed direction (16). In addition, there is a positioning device for the welding wire (11), having a positioning drive (24), by means of which a wire end of the welding wire (11), which is leading in the feed direction (16), can be arranged in a welding readiness position while the welding wire (11) moves in an oscillating manner relative to the wire guide (17) in the longitudinal direction of the wire. A method for laser welding by means of a filler material in the form of a weld