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

A method for the electrochemical machining of blades of a turbomachine, wherein the blade has a gas passage region and comprises shrouds at a blade root and/or at a blade tip, which shrouds are inclined on one side or on both sides so that undercuts exist in the gas passage region, and wherein the method comprises using at least two multipart electrodes comprising sub-electrodes which are moved from an initial position at a first distance from a surface to be machined to an end position at a second distance from an end contour of the surface to be machined so that in the end position a closed working surface of the electrodes with a negative shape lies opposite the end contour of the surface to be machined.

A method for the electrochemical machining of blades of a turbomachine with at least one U-shaped or trapezoidal cross-sectional profile of a surface to be machined, wherein the method comprises providing an electrode array with at least three electrodes which can be moved in different directions, the electrodes being moved from an initial position at a first distance from the surface to be machined to an end position at a second distance from the surface to be machined so that in the end position a closed working surface of the electrodes with a negative shape lies opposite a surface contour of the surface to be machined.

An electrode array for carrying out an electrochemical machining, wherein the electrode array comprises at least three electrodes or at least two multipart electrodes comprising sub-electrodes, and wherein the electrodes and/or the sub-electrodes of the multipart electrodes can be moved in different directions in relation to each other and in relation to a stationary mounting and can be moved from an initial position to an end position.