Mtu Aero Engines Gmbh

Mtu Aero Engines Ag

Mtu Motoren-und Turbinen-union Muenchen, Gmbh

Mtu Motoren-und Turbinen-union

Dorner

Albin Platz

Erwin Bayer

Martin Bussmann

Thomas Kraenzler

Juergen Steinwandel

Roland Huttner

Nicole Feiling

Hermann Klingels

Jürgen Steinwandel

Anna Carina Kuepper

Peter Adam

Karl-Heinz Dusel

Alexander Gindorf

Thomas Kränzler

Klaus Schweitzer

Natividad Lopez Lavernia

Matthias Schmidt

Martin Stroeer

Harald Geiger

Jochen Laun

Karsten Gold

Steffen Gerloff

Norbert Huber

Matija Burger

Daniela Arbinger

Michael Lahres

Martin Ströer

Walter Rothammel

Konrad Rager

The present invention relates to a method for manufacturing a plate of a turbomachine having a plurality of receiving grooves, which are formed on the cylindrical peripheral surface of the plate in order to receive blade roots of blades of the turbomachine. The receiving grooves extend in a straight line from one face of the plate to the other face of the plate, such that a straight line delimits the receiving groove from each point on the cross section of the receiving groove on one of the faces to the corresponding point on the cross section on the other face. A circular plate is provided and a plurality of receiving grooves are introduced into the plate simultaneously on opposing regions relative to a central axis of rotation of the plate.

Method for producing a plate of a turbomachine

The present invention relates to a method for the production of drill holes in difficult to machine materials, in which a removal of material takes place in order to produce a drill hole by electrochemical erosion of material by an electrode that is moved in the longitudinal direction of the drill hole being produced in the direction onto the material to be processed at a feed rate, wherein the drilling has at least two steps, wherein, in the first step, the electrochemical processing takes place, and wherein, in a second step, the further processing of the drill hole to the final diameter takes place by machining processing or by erosion or by an electrochemical processing.

Method for the production of drill holes in difficult to machine materials

Disclosed is an electrode arrangement for the defined rounding or deburring of edges of electrically conductive components, in particular turbine components, by means of electrochemical machining with at least one working electrode (), which has a tubular electrode carrier, through which an electrolyte inflow line () is provided, the electrode carrier having on the front end a closure (), which is arranged such that the electrolyte inflow line in the axial direction of the electrode carrier is closed, and at least one outlet opening () being arranged in the radial direction. Also disclosed is a self-centering electrode arrangement and an installation for the defined rounding or deburring of edges of electrically conductive components by means of electrochemical machining with at least one corresponding electrode arrangement and also a method using the electrode arrangements and the described installation.

Electrode and installation for electrochemical machining and method therefor

The invention relates to a method for electrochemically machining blades of a turbomachine having at least one U-shaped or trapezoidal cross-sectional profile of the surface to be treated, wherein an electrode array having at least three electrodes that can be moved in different directions is provided. The electrodes are moved from a start position having a first distance to the surface to be machined into an end position having a second distance to the surface to be machined, wherein in the end position, a closed work surface of the electrodes having a negative shape of the surface contour of the surface to be machined is located opposite thereof. The invention further relates to an electrode array for carrying out an electrochemical machining, wherein the electrode array comprises at least three electrodes that can be moved in different directions to one another, and to stationary mounting, wherein the electrodes can be moved from a start position to an end position.

Multipart electrode array and method for the electrochemical treatment of blades having shrouding bands

The invention relates to a method for producing and repairing a part comprising at least two joined metal components, especially components of a gas turbine. In said method, corresponding joining surfaces of the components are joined together and connected by means of a pressure welding process, a machining allowance in the area of a joining zone of the two joining surfaces is upset during the joining process, and once the two components have been joined together, the machining allowance is machined by means of a precise electrochemical machining (PECM) process until a predefined final contour of the part has been obtained. The invention further relates to a gas turbine part obtained by means of the disclosed method.

Method for producing and repairing a part, and part of a gas turbine

A method for removing material from a component that is connected as an anode is disclosed. In an embodiment, an electrode that is connected as a cathode is guided to the component such that a gap is formed, an electrolyte is introduced into the gap, and a closed system is formed for the electrolyte by the formation of a duct. The electrolyte is continuously guided from an inlet opening to an outlet opening of the duct. Forming the duct, e.g., by guide elements that are mounted on the electrode, ensures that only those surface parts of the component to be machined from which material is to be removed enter in contact with the electrolyte while the other surface parts do not enter in contact with the electrolyte. Since the electrolyte is continuously guided across the surface, used electrolyte is continuously discharged along with residual matter while fresh electrolyte is delivered.

Method for removing material from a component, and electrode

The invention relates to a device () for electrochemically removing a surface of a component (), in particular a blade of an integrally bladed rotor, comprising at least one electrode (), which has an outer contour that corresponds to a surface of the component to be produced, and a hydraulic pressure device (), which has a pressure piston () coupled to the electrode () and a hydraulic chamber () in operative connection with the pressure piston () for receiving the hydraulic medium, wherein the pressure piston can be loaded with an actuating force and moved relative to the hydraulic pressure device () by means of the hydraulic medium, wherein the hydraulic chamber () is fluidically encapsulated relative to the pressure piston (). The invention further relates to a method for electrochemically removing a surface of a component ().

Device and method for electrochemically removing a surface of a component

A method for repairing gas turbine components, in particular gas turbine blades, including at least the following steps: a) preparing a gas turbine component to be repaired; b) removing a damaged portion from the gas turbine component to be repaired, thereby forming a plane separation surface; c) placing the gas turbine component at least partly in a process chamber in such a way that the plane separation surface extends approximately horizontally within the process chamber; d) filling the process chamber with a metal powder that is bonding-compatible with the material of the gas turbine component to be repaired, namely up to the level of the separation surface; e) building up the removed portion on the separation surface by depositing metal powder in layers onto the separation surface and by fusing the metal powder, which has been deposited in layers onto the separation surface, to the separation surface.

Repair method

The invention at hand relates to a method for processing and repairing a metal component with at least one finished or nearly finished partial component surface and at least one working surface to be further processed by means of an electrochemical treatment process and abutting the at least one finished or nearly finished partial component surface, with the process comprising the following steps: a) application of an electrically conductive layer on at least one area of the at least one finished or nearly finished partial component surface abutting the working surface to be processed, with the layer containing a metal or a metal alloy that has a similar or the same as, or a desiredly different electrochemical erosion behavior than the metal component; and b) electrochemical treatment of the working surface and of the layer, with the layer being completely or nearly completely eroded. The invention moreover relates to a component of a gas turbine or of a high or low pressure compressor.

Procedure for the production and application of a protective layer

A method for manufacturing gear wheels, specifically transmission gear wheels, is disclosed. An embodiment of the method includes the following steps: a) preparation of a base body for a gear wheel, b) electrochemical processing of the base body by a precise electrochemical machining process (PECM process), where several recesses running between the teeth of the gear wheel are made simultaneously electrochemically to manufacture the teeth of the gear wheel.

Method for producing gear wheels

The invention concerns a method for the machining of a metallic structural component, particularly a structural component of a gas turbine, by means of finishing with a pulsed electrochemical ablation process, whereby the structural component features a pre-contour, to be finished, with different over-measures. The method is characterized by the following processing steps: a) determination of the different over-measures of the pre-contour, and b) bilateral and simultaneous finishing by means of a simultaneous feed of respectively at least one electrode disposed on different sides of the structural component, whereby the feed velocity of the electrode in the area of the largest over-measure of the pre-contour is higher than the feed velocity in the area of the smaller over-measure of the pre-contour.

Method for machining a metal component

A method for machining workpieces provides a machining electrode, which is guided at a specific distance to the workpiece. An electrolyte is provided between the workpiece and the machining electrode, through which an operating current flows between the machining electrode and the workpiece. The operating current results from an operating voltage (U), which is produced at the machining electrode, the workpiece being connected to ground. To perform the machining procedure, the distance between the machining electrode and the workpiece is regulated and the operating voltage (U) is determined in such a way that the resulting operating current is a DC current or a pulsed DC current&#x2014;i.e., the operating voltage is a DC voltage of fixed or specific dimension. A measuring voltage (U) is superimposed on the operating voltage (U) for producing the operating current. The measuring current resulting because of the application of the measuring voltage (U) is detected and the distance between the machining electrode and the workpiece is concluded from the relationship between the measuring voltage (U) and the measuring current.

Method for machining workpieces

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 the or each aerodynamic structure in an electrochemical sinking by placing the rotor disk base body and the or each working electrode in an electrolyte and by applying voltage and/or current, whereby the applied current and/or voltage is temporally pulsed; e) pressure-rinsing the gap which is filled with electrolytes between the aero-dynamic structure and the or each working electrode by a pulsed movement of the or each working electrode.

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

A method for manufacturing integrally bladed rotors (preferably gas turbine rotors) is provided. The method includes the steps of a) providing a basic rotor body; b) placing the basic rotor body into an electrolyte; c) electrochemically machining the basic rotor body by simultaneously manufacturing a plurality of unmachined blades; and d) subsequently machining the unmachined blades to provide hydrodynamic surfaces, in particular a suction side and a pressure side, in the area of each unmachined blade.

Method and device for manufacturing integrally bladed rotors

A method and device for the production of components having a three-dimensionally formed surface by a lowering operation with an electrochemical ablation process, namely a Precise Electro Chemical Machining (PECM) process, is disclosed. The method includes the steps of: a) providing a specially pre-formed workpiece featuring a specific dimensional allowance; b) providing at least one working electrode, in which case the contour of the working electrode, or of each working electrode, is adapted to the contour of the three-dimensionally formed surface to be produced; and c) lowering the three-dimensionally formed surface by placing the pre-formed workpiece and the working electrode, or each working electrode, in an electrolyte and by applying an electrical voltage or an electrical current, in which case the working electrode, or each working electrode, is moved in the sense of a circular advance motion in the direction toward the workpiece.

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Ried-Baindlkirch, Germany

Albin Platz