METHOD FOR REPAIRING AN AIRFOIL, AND COOLING COLLAR

摘要

The invention relates to a method for repairing an airfoil (9) of an axial turbomachine in which material is deposited onto the airfoil (9) by means of deposition welding, and the airfoil (9) is cooled during the deposition welding. The invention further relates to a cooling collar (1) comprising at least one cooling channel (5) which has a coolant inlet (6) and a coolant outlet (7) and through which a coolant flows in the intended state. The cooling collar also comprises multiple cooling elements (8) which are arranged along an inner circumference of the cooling collar (1) and adjacently to the at least one cooling channel (5), said cooling elements resting against an object to be cooled, in particular an airfoil (9) to be cooled, in the intended state.