Rolls-Royce Deutschland Ltd & Co. Kg

Leping Zhu

Thomas Haubold

Gregor Riedel

Martin Spallek

With a method for finish-machining the blade tips of rotor wheels made in BLISK design, the rotor wheel or multi-stage compressor rotor (), is machined&#x2014;blade by blade and stage by stage&#x2014;at the blade tips () by a conical cutter () whose cutting edge () is oriented tangentially to the outside surface of the rotor wheel/compressor rotor and routed on the blade tip essentially along the centerline thereof, with the cutting force being introduced perpendicular to the tool axis and in the stiffest direction of the blade (), i.e. the centerline () of the blade cross-section and the perpendicular axis extending from the centerline. The cutting action and the force introduction of the conical cutter at the blade tip allow production of blade tips with a geometrically precisely defined edge without setting the respective blades into vibration.

Method for the manufacture of the blade tips of rotor wheels made in BLISK design

An arrangement for the repair of BLISK blades damaged at their leading and trailing edges by use of laser deposition welding, includes a laser source and laser optics for generating a focused laser beam () and a powder line () connected to a powder reservoir for supplying metal powder to be melted by the laser beam to the weld area. A modular, tubularly elongated welding apparatus () with a connection module () which is connected to a laser source and in which the entering laser beam is deflected in longitudinal direction and parallelized, and to the one side of the connection module () is connected to a camera module for a CCD camera () enabling the precise positioning of the welding apparatus and the deposition of the molten metal powder on the respective blade to be monitored and controlled.

Arrangement for the repair of the blades of BLISK drums by means of laser deposition welding

A method and an apparatus for repairing gas-turbine blisks uses an endoscopeprovided with processing optics featuring a flexible light guide arrangement. A laser sourceis connected to a flexible optical fiber arrangement, with a filler material feederfor supplying welding flux via a flexible line, with a water supplyconnected to a flexible line, and with an inert gas supplyconnected to a flexible linefor supplying inert gas, with the flexible lines, the flexible light guide arrangementand the flexible optical fiber arrangementbeing combined to form a flexible long repair implementat least at its distal end areas.

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Darmstadt, Germany

Leping Zhu