An electrical discharge machining method includes a step of selectively immersing only a portion of a workpiece in an electrical discharge machining liquid such that a machining object portion included in the portion of the workpiece is opposed to an electrode immersed in the electrical discharge machining liquid and a step of applying an electrical discharge machining to the machining object portion by applying a voltage between the electrode and the workpiece in a state where the portion of the workpiece is selectively immersed in the electrical discharge machining liquid, the portion including the machining object portion.

An electrical discharge machining method includes a step of selectively immersing only a portion of a workpiece in an electrical discharge machining liquid such that a machining object portion included in the portion of the workpiece is opposed to an electrode immersed in the electrical discharge machining liquid and a step of applying an electrical discharge machining to the machining object portion by applying a voltage between the electrode and the workpiece in a state where the portion of the workpiece is selectively immersed in the electrical discharge machining liquid, the portion including the machining object portion.

Electrode for an electro-erosion process, includes a shaft, a body coupled to the shaft, a plurality of machining-inserts, an insulated layer, and a flushing cover disposed on the body and coupled to the shaft. The shaft includes a channel, a plurality of first openings and second openings, where each opening is connected to the channel. The body includes a plurality of main-flushing channels, where each channel is connected to a corresponding first opening. The plurality of machining-inserts is spaced apart from each other along a circumferential direction and detachably coupled to a peripheral end portion of the body. Each machining-insert includes at least one third opening connected to a corresponding main-flushing channel. The insulated layer is disposed on top and bottom surfaces of the body. The flushing cover includes a plurality of side-flushing channels and a plurality of fourth openings, where each channel is connected to a corresponding second opening.

An electrode applied in electro-machining processes, where the electrode includes a main body portion and at least one built-in internal flushing passage for introducing a flushing liquid to a volume between the electrode and a workpiece to be machined. The electrode is made by an additive fabrication process that enables specialized flushing for enhancing waste material evacuation and incorporate special material properties like zones of high electrical conductivity and thermal resistance. The fabrication process produces materials and geometries that could not otherwise be made using conventional processing.

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.

Electrode for an electro-erosion process, includes a shaft, a body coupled to the shaft, a plurality of machining-inserts, an insulated layer, and a flushing cover disposed on the body and coupled to the shaft. The shaft includes a channel, a plurality of first openings and second openings, each opening connected to the channel. The body includes a plurality of main-flushing channels, where each channel is connected to a corresponding first opening. The plurality of machining-inserts is spaced apart from each other along a circumferential direction and detachably coupled to a peripheral end portion of the body. Each machining-insert includes at least one third opening connected to a corresponding main-flushing channel. The insulated layer is disposed on top and bottom surfaces of the body. The flushing cover includes a plurality of side-flushing channels and a plurality of fourth openings, where each channel is connected to a corresponding second opening.

The present disclosure provides an electrochemical machining apparatus including a pressurized tank, a cap, a stabilizing plate, a guiding element, and an electrode. The pressurizing tank has a top surface and a chamber, wherein the top surface is disposed with an opening and a limiting portion. The cap fits in the opening and is limited by the limiting portion to seal the pressurized tank. The stabilizing plate is spaced from the top surface or the cap by a distance. The guiding element penetrates the stabilizing plate to connect with the cap and provides a channel to the chamber. The electrode is guided by the guiding element and penetrates the chamber via the channel. When the electrode processes a workpiece in the chamber during an electrochemical machining operation, the cap takes a pressure generated during the electrochemical machining operation, and the stabilizing plate stabilizes the electrode and the guiding element.

The present disclosure provides an electrochemical machining apparatus including a pressurized tank, a cap, a stabilizing plate, a guiding element, and an electrode. The pressurizing tank has a top surface and a chamber, wherein the top surface is disposed with an opening and a limiting portion. The cap fits in the opening and is limited by the limiting portion to seal the pressurized tank. The stabilizing plate is spaced from the top surface or the cap by a distance. The guiding element penetrates the stabilizing plate to connect with the cap and provides a channel to the chamber. The electrode is guided by the guiding element and penetrates the chamber via the channel. When the electrode processes a workpiece in the chamber during an electrochemical machining operation, the cap takes a pressure generated during the electrochemical machining operation, and the stabilizing plate stabilizes the electrode and the guiding element.

A tool is provided for use in processing a pre-formed channel within an electrically conductive component in order to reduce and/or inspect local protrusions left on the surface of the channel by the initial channel forming process, the tool comprising: a probe including a stem that is elongate in an axial direction and is configured to be inserted into the channel, and at least one electrode formed on the stem that is electrically isolated from the stem; a DC electric power supply, configured to establish an electric potential between the at least one electrode and the electrically conductive component in which the channel is formed; and an electrolyte solution supply configured to provide a flow of electrolyte solution into the channel.