Method for repairing and producing integrally bladed rotors for a turbine or turbo engine

US6438838B1 · kind B1 · utility

Assignees

• MTU Aero Engines AG · DE
• KUKA Schweissanlagen GmbH · DE

Inventors

• Reinhold Meier · Dorfen, DE
• Wilfried Schutte · Oberhaching, DE
• Mario Schmidt · Freiberg, DE
• Karel Mazac · Augsburg, DE

Key dates

• Filing date: May 14, 2001
• Grant date: Aug 27, 2002
• Expiry date: May 14, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49321
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A method for repairing/manufacturing an integrally bladed rotor for a turbine or turbo engine, in which, in the case of a repair, at least one vane section to be replaced is removed leaving a stub section to which a replacement vane section is to be welded, and, in the case of manufacturing, a carrier to be provided with vanes has stubs projecting over its peripheral surface, to each of which a vane is to be welded, includes the steps of: arranging an inductor around the front face of the stub section or stub; positioning a replacement vane section or vane at a small radial distance from and aligned with the stub section or stub; and welding the replacement vane section or vane to the stub section or stub, respectively, in a protective gas atmosphere by exciting the inductor with high-frequency current and moving the opposing heated part surfaces together.