The invention relates to the production of a device for holding one or more electrode(s) for electrical discharge machining, comprising a body (41) having a rectilinear portion (43a) in which at least one first duct (45) is provided for the passage of one or more electrode(s) (21). The body further has an integral curved portion (43b) in which (at least) one second curved dielectric fluid supply duct (47) is provided and in which is provided a curved extension (45b) of said at least one first duct. The curved extension and the second curved duct are made of ceramic, with an inner mean roughness of: Ra<2 m.

The invention relates to the production of a device for holding one or more electrode(s) for electrical discharge machining, comprising a body (41) having a rectilinear portion (43a) in which at least one first duct (45) is provided for the passage of one or more electrode(s) (21). The body further has an integral curved portion (43b) in which (at least) one second curved dielectric fluid supply duct (47) is provided and in which is provided a curved extension (45b) of said at least one first duct. The curved extension and the second curved duct are made of ceramic, with an inner mean roughness of: Ra<2 m.

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 wire electrical discharge machine includes: a determination unit that determines whether or not a first route and a second route, each including an approach path, a machining path and an escape path in this order, are set in this order as a movement route of a wire electrode; and a wire movement control unit that, when the first route and the second route are determined to be set in a machining program in this order as the movement route of the wire electrode, causes the wire electrode to transition from the machining path of the first route to the machining path of the second route without moving the wire electrode along the escape path of the first route and the approach path of the second route.

A wire electrical discharge machine includes: a determination unit that determines whether or not a first route and a second route, each including an approach path, a machining path and an escape path in this order, are set in this order as a movement route of a wire electrode; and a wire movement control unit that, when the first route and the second route are determined to be set in a machining program in this order as the movement route of the wire electrode, causes the wire electrode to transition from the machining path of the first route to the machining path of the second route without moving the wire electrode along the escape path of the first route and the approach path of the second route.

EDM assemblies mount on a machining surface and discharge rotating sub-electrodes against the surface. The sub-electrodes can also revolve about another shared axis while discharging. Rotation and revolution may be achieved with planetary gears fixed with the sub-electrodes and meshing with a stationary sun gear. Several sub-electrodes can be used in a single assembly. Downward movement of the sub-electrodes from a central shaft on the mount allows several inches of the surface to be machined. Assemblies are usable in a nuclear reactor during a maintenance period to machine a hole for a replacement manway cover underwater in the flooded reactor. The differing rotational movements and vertical movement can be independently controlled with separate motors in the assembly. Power and controls may be provided remotely through an underwater connection.

A method for preprocessing data related to a tool electrode, which is applied in an EDM machine to manufacture a part comprises: generating an electrode model for the tool electrode based on the geometry of the part; generating the cavity shape model (volume of the part to erode), combining the electrode and cavity shape model, dividing the resulting model into a plurality of slices in a plurality of parallel planes, wherein at least one slice is composed of at least two sections, which are topologically disconnected; and generating for each slice a slice-geometry data, and generating an electrode-geometry data including the slice-geometry data.

An apparatus for electrochemical machining gear outline and the alignment structure thereof is disclosed, the apparatus comprises first and second alignment members. The first and second alignment members include a plurality of first alignment teeth and second alignment teeth, respectively. Recessing a gear-outline edge of the first alignment teeth by a distance and extending a gear-outline edge of the second alignment teeth by the distance for against to each other to align the first and second alignment members. A cathode electrode includes a plurality of machining teeth with both gear-outline edges recessed by the distance for against the gear-outline edge of the second alignment teeth with the extended distance to align machining teeth. Thereby, before trimming the gear-outline of a workpiece, the machining gap between the machining teeth and the teeth of the workpiece can be aligned first.

An apparatus for electrochemical machining gear outline and the alignment structure thereof is disclosed, the apparatus comprises first and second alignment members. The first and second alignment members include a plurality of first alignment teeth and second alignment teeth, respectively. Recessing a gear-outline edge of the first alignment teeth by a distance and extending a gear-outline edge of the second alignment teeth by the distance for against to each other to align the first and second alignment members. A cathode electrode includes a plurality of machining teeth with both gear-outline edges recessed by the distance for against the gear-outline edge of the second alignment teeth with the extended distance to align machining teeth. Thereby, before trimming the gear-outline of a workpiece, the machining gap between the machining teeth and the teeth of the workpiece can be aligned first.