In a method for repairing and / or upgrading a component (10′), preferably of a gas
turbine, especially a blade (10′), which component has been deformed during operation, a simplification with cost advantages is achieved by a first nominal CAD model (M1) of the non-deformed component (10) being made available, by the deformed component (10′) being measured, and by the first CAD-model (M1), with the aid of the data determined on the deformed component (10′), being transformed into a second CAD model (M2) of the deformed component (10′) by
morphing. A
cutting line, which determines a
cut-out in the component (10′), and also an insert piece, which can be inserted in the
cut-out, is established in the second CAD model (M2). A
cut-out is introduced into the component (10′) in accordance with the
cutting line, an insert piece for inserting in the cut-out is manufactured in accordance with the
cutting line, the manufactured insert piece is inserted in the cut-out, and the inserted insert piece is connected to the component (10′) in a materially bonding manner.