a method and device are provided for welding structural parts , preferably of a gas turbine , especially of an aircraft engine . a structural component is laser - welded by means of at least one laser source , the one or more laser sources being operated in a pulsed mode . pulse duration and / or pulse shape and / or output of the one or more laser sources are adjusted in a variable manner . the wire advance of the welding wire is controlled subject to the pulses of the one or more laser sources .