Reparaturverfahren für beschädigte Schaufelblätter von Turbomaschinen

摘要

The invention relates to a method of repairing aerofoils (6), damaged in the head or edge area, of turbine engines. To this end, first of all damaged areas, except for an undamaged aerofoil stub, are cut off essentially transversely to the longitudinal extent of the aerofoil or at an angle to the front or rear edge of the aerofoil or roughly in a semicircular shape around the damaged aerofoil area to form a straight or roughly semicircular repair surface (31). The repair surface of the aerofoil stub is then prepared for butt welding. After that, a repair plate (7) of constant thickness, exceeding the maximum profile height of the aerofoil by more than 50%, is tack welded in an abutting position to the repair surface (31) with an end face (30) adapted to the repair surface, and the aerofoil stub and the repair plate (7) are welded by means of butt welding. Finally, the welding seam and the repair plate (7) are removed down to the profile contour of the aerofoil stub and to the desired aerofoil profile. This method is preferably used for the repair of aerofoils of integral rotors of turbine engines, in particular for aerofoils of integral compressor rotors.