Provided is an electrode capable of increasing a degree of freedom in machining shape with a simple structure, an electrochemical machining apparatus using the electrode, an electrochemical machining method, and a product machined by the method. An electrode 4 has a core tube 41 formed of a material by which a second hole 101b having a direction or a curvature different from that of a first hole 101a having a predetermined curvature can be formed continuously from the first hole 101a and a coating 42 fixed to an outer periphery of the core tube 41.

Provided is an electrode capable of increasing a degree of freedom in machining shape with a simple structure, an electrochemical machining apparatus using the electrode, an electrochemical machining method, and a product machined by the method. An electrode 4 has a core tube 41 formed of a material by which a second hole 101b having a direction or a curvature different from that of a first hole 101a having a predetermined curvature can be formed continuously from the first hole 101a and a coating 42 fixed to an outer periphery of the core tube 41.

A method for producing a cavity in a blade platform of a blade, in particular of a turbine blade, as part of a blade-platform cooling system, wherein the method has the steps of: producing a first bore from a first platform lateral face in the direction of an opposite second platform lateral face, with a first opening in the first platform lateral face being created, and expanding the first bore in a fan-like manner by an electrical discharge machining method, in particular using a wire- or bar-form electrode, such that the first opening, created in the first step, of the first bore represents the starting point of the fan-like expansion. A blade is produced in particular with such a method.

A method for producing a cavity in a blade platform of a blade, in particular of a turbine blade, as part of a blade-platform cooling system, wherein the method has the steps of: producing a first bore from a first platform lateral face in the direction of an opposite second platform lateral face, with a first opening in the first platform lateral face being created, and expanding the first bore in a fan-like manner by an electrical discharge machining method, in particular using a wire- or bar-form electrode, such that the first opening, created in the first step, of the first bore represents the starting point of the fan-like expansion. A blade is produced in particular with such a method.

A method for manufacturing a blade, the method includes casting a nickel alloy blade precursor having an airfoil and a root. The airfoil and the root are solution heat treating differently from each other. After the solution heat treating, the root is wrought processed. After the wrought processing, an exterior of the root is machined.

A system is configured for machining a workpiece (100), the workpiece includes an interior surface (110) that defines an internal passage (112). The system includes an electrode (116) located within the internal passage and electrically isolated from the workpiece, an electrolyte supply, a power supply, and a remover. The electrolyte supply is configured for circulating an electrolyte in a gap between the electrode and the workpiece. The power supply is configured for applying a voltage between the electrode and the workpiece to facilitate smoothing the interior surface. The remover is configured for completely removing the electrode from within the internal passage after smoothing the interior surface.

A method for pulsed electrochemical machining (pECM) a turbine component, comprising: generating a pulsed direct current between one or more electrodes of a machining tool and the turbine component, wherein the machining tool comprises a tool body defining a tool axis, the tool body comprising the one or more electrodes, each of the one or more electrodes comprising an electrically conductive material and defining a working surface at a distal end of the tool axis configured to face the turbine component; delivering an electrolyte into an interelectrode gap between the working surface of the one or more electrodes and a target surface of the turbine component; and positioning the working surface of the one or more electrodes relative to the target surface of the turbine component to remove material from the target surface of the turbine component.

A method for pulsed electrochemical machining (pECM) a turbine component, comprising: generating a pulsed direct current between one or more electrodes of a machining tool and the turbine component, wherein the machining tool comprises a tool body defining a tool axis, the tool body comprising the one or more electrodes, each of the one or more electrodes comprising an electrically conductive material and defining a working surface at a distal end of the tool axis configured to face the turbine component; delivering an electrolyte into an interelectrode gap between the working surface of the one or more electrodes and a target surface of the turbine component; and positioning the working surface of the one or more electrodes relative to the target surface of the turbine component to remove material from the target surface of the turbine component.

A pulsed electrochemical machining (pECM) system includes a pECM tool comprising a tool body defining a tool axis, the tool body comprising one or more electrodes, each of the one or more electrodes comprising an electrically conductive material and defining a working surface at a distal end of the tool axis configured to face a workpiece; an enclosure system configured to hold the workpiece, wherein the enclosure system comprises: a first clamp configured to grip a first end of the workpiece; a second clamp configured to grip a second end of the workpiece; and a backside support configured to support a span of the workpiece between the first end and the second end.

A pulsed electrochemical machining (pECM) system includes a pECM tool comprising a tool body defining a tool axis, the tool body comprising one or more electrodes, each of the one or more electrodes comprising an electrically conductive material and defining a working surface at a distal end of the tool axis configured to face a workpiece; an enclosure system configured to hold the workpiece, wherein the enclosure system comprises: a first clamp configured to grip a first end of the workpiece; a second clamp configured to grip a second end of the workpiece; and a backside support configured to support a span of the workpiece between the first end and the second end.