A method for producing of a metal component that is electrochemically machined to remove material, wherein an electrode is positioned adjacent to and, by a duct gap, spaced from a component portion to be machined, and in the presence of an electrolyte a current and a voltage are applied to the electrode and the component. The electrode is moved toward the component from an initial position to a terminal position. In a first operating mode material is removed using a permanently applied current and voltage, a constant electrolyte flow through the duct gap, and a constant advancement of the electrode from the initial position toward the component while maintaining a first gap width. Upon achieving a predetermined removal depth, a changeover to a second operating mode occurs and the electrode is moved cyclically between a non-operating position and an operating position having a second gap width smaller than the first gap width. A current pulse and voltage pulse are applied only in the operating position, and the electrolyte flows through the gap at least in the non-operating position. The second operating mode is maintained until a desired final geometry.

A device for the electrochemical processing of a metal workpiece, including a plurality of electrodes that by way of respective linear drive units are movable in a linear manner relative to the workpiece from an initial position to a terminal position, the electrodes having a reproduction face that is directed toward the workpiece, wherein at least three electrodes are provided, the electrodes being disposed so as to be offset around the circumference of the workpiece and by way of the reproduction faces of the electrodes during the entire readjustment movement from the initial position to the terminal position engaging across one another in portions so as to be in contact, and by way of the reproduction faces of the electrodes delimiting a fluid duct that in a closed manner encircles the circumference of the workpiece.

A wire electrical discharge machine includes: a travelling route formed of multiple divisional regions, through which a wire electrode is fed by an auto wire feeding mechanism; and a memory storing failure evaluation reference data on the auto wire feeding for every divisional region. The wire electrical discharge machine detects failure of the auto wire feeding and locate the tip position of the wire electrode at the time of failure and causes a controller to determine whether to perform or stop retry of the auto wire feeding based on the located tip position and the failure evaluation reference data for every divisional region.

A multiwire electric discharge machine includes: a machining power source that applies a machining pulse voltage between a workpiece and a cutting wire section; and a wire breakage detection unit that detects breakage of a wire electrode. The wire breakage detection unit is electrically connected in parallel to a wire electrode portion stretched over a section from one location on the feeding side of the wire electrode to one location on the ejection side of the wire electrode, and the wire breakage detection unit includes: a wire breakage detection circuit in which a wire breakage detection power source constantly supplying direct current to the wire electrode portion at least while the workpiece is undergoing a cutting process and a current limiting resistor are connected in series; and a wire breakage determination unit that determines breakage of the wire electrode based on current flowing through the current limiting resistor.