Method for producing aerodynamic structures in the manufacturing of integrally bladed gas turbine rotors

US8262897B2 · kind B2 · utility

Assignee

• MTU Aero Engines AG · DE

Inventors

• Erwin Bayer · Dachau, DE
• Martin Bussmann · Markt Indersdorf, DE
• Thomas Kraenzler · Salem, DE
• Albin Platz · Mering, DE
• Juergen Steinwandel · Überlingen, DE

Key dates

• Filing date: Jul 25, 2005
• Grant date: Sep 11, 2012
• Expiry date: May 21, 2028

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23H2300/12
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a method for the production of aero-dynamic structures during the production of integrally bladed gas turbine rotors. Aerodynamic structures of an integrally bladed gas turbine rotor are produced on a rotor disk base body, whereon the end contours are precise, by removing material according to an electrochemical removal process, i.e. by means of an electrochemical machining (ECM)-process. The method comprises the following steps: a) preparing a rotor disk base body which is made of a material which is difficult to machine; b) removing the material which is between the blade wings until a specific dimension is obtained, according to a removal process; c) preparing at least one working electrode in order to finish at least one aerodynamic structure of an integrally bladed gas turbine rotor. The contours of the or each of the working electrodes are adapted to the contours of the aerodynamic structure, which are produced by means of the respective working electrode, such that a gap between the rotor disk base body and a working electrode are produced in an approximately identical manner during the removal process of the material; d) electrochemically machining …