Alstom Technology Limited

General Electric Technology Gmbh

Ansaldo Energia IP UK Limited

Tobias Schmitt

Michael Seemann

Guenter Ambrosy

Hans Bissig

Frigyes Szücs

Igor Zebec

Josip Stedul

Raphael Schweizer

Hermann Emminger

Stefan Schlegel

Günter Ambrosy

A method is provided for repairing a single crystal turbine blade, which includes an airfoil with a tip having a tip cover plate, tip cooling air holes and a tip crown. The method includes removing the tip crown by manual grinding, thereby preserving the underlying tip cover plate; preparing the tip cooling air holes by manual grinding; closing said prepared tip cooling air holes by manual welding; and building-up a new tip crown by a LMF (Laser Metal Forming) process.

Method for repairing a single crystal turbine blade

A method is provided for reconditioning a turbomachine vane cover plate, by a forming apparatus. The vane having a mounting portion, an airfoil extending radially outward therefrom and a vane head connected to the airfoil. The vane also having a cover plate connected to the vane head, bulged in a direction opposite to the root. In a first analysis step, dimensions of the vane in relation to the cover plate are determined in respect of predefined reference points. If, thereafter, forming of the cover plate seems necessary and possible based on comparison of measurement values from the analysis step with predefined dimension values, the bulged cover plate is formed, at least essentially pressed smooth, by pressing by the forming apparatus in a forming step. After the forming step, the cover plate is re-treated in one or more follow-up steps. An apparatus is also provided for carrying out the method.

Apparatus and method for the forming of turbine vane cover plates

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Olten, Switzerland

Tobias Schmitt