This narrow-hole electric discharge machine (100), which performs electric discharge machining by relatively moving a narrow-hole electrode (28) attached to a main spindle (114) and a workpiece (130) attached to a table (118), comprises: a positioning guide (16) which is attached to a guide arm (142) below the main spindle, through which the narrow-hole electrode is inserted such that a lower portion of the narrow-hole electrode is movable in the direction of an axis line (CL0), and which supports the narrow-hole electrode; and a power feeder (10) which is provided at a predetermined position directly above the positioning guide of the guide arm, comes into direct contact with the narrow-hole electrode movable in the axis line direction and feeds power to the narrow-hole electrode, wherein the distance from a power feed position to the tip of the positioning guide is constant regardless of the length of the narrow-hole electrode.

An apparatus for electrical discharge machining process is disclosed. The apparatus comprises adjustable supports, up-on which an elongated workpiece to be machined can be placed and rotated. The adjustable support allows to adjust the position of the workpiece with respect to a base plate. The apparatus further comprises a rotating member, adapted to grip one end of the elongated workpiece to be machined and rotate it around its longitudinal axis. Also disclosed are a method for machining rotor and a monolithic shaft-impeller rotor.

An opening machining apparatus for a heat transfer tube, a method of machining an opening in a tube wall of a heat transfer tube using the same apparatus, and a method of removing a foreign material through the same opening are provided. The opening machining apparatus for the heat transfer tube includes an electric discharge machining device inserted into the heat transfer tube and configured to form an opening in a tube wall of the heat transfer tube through an electric discharge machining, an electric discharge machining device driving device connected to the electric discharge machining device and configured to transport the electric discharge machining device, an electric discharge machining device driving device connected to the electric discharge machining device and configured to provide force for bringing the electric discharge machining device into close contact with a tube wall surface of the heat transfer tube, and an electric discharge machining device rotation device configured to provide force for rotating the electric discharge machining device in a circumferential direction of the heat transfer tube in the heat transfer tube.

The invention relates to a method for manufacturing an equipment part, comprising the following steps: providing a substrate, an upper face of which includes a large main surface; providing a computer model comprising spatial coordinates of said main surface and a second portion of the equipment part; then additive manufacturing of the second portion from the main surface, so as to secure said main surface and said second portion; then cutting in a thickness of the substrate to obtain a thin plate including the main surface secured to the second portion of the equipment part.

The invention relates to a method for manufacturing an equipment part, comprising the following steps: providing a substrate, an upper face of which includes a large main surface; providing a computer model comprising spatial coordinates of said main surface and a second portion of the equipment part; then additive manufacturing of the second portion from the main surface, so as to secure said main surface and said second portion; then cutting in a thickness of the substrate to obtain a thin plate including the main surface secured to the second portion of the equipment part.

A manufacturing method is provided. During this method, a preform component is provided for a turbine engine. The preform component includes a substrate comprising electrically conductive material having an outer coating comprising non-electrically conductive material applied over a surface of the substrate. A preform aperture is formed in the preform component using an electrical discharge machining electrode. The preform aperture includes a meter section of a cooling aperture in the substrate. The preform aperture also includes a pilot hole in the outer coating. A diffuser section of the cooling aperture is formed in at least the outer coating using a second machining process.

In an electrical discharge machine that applies a voltage between an electrode and a workpiece to generate electrical discharge, an electrode holder holds the electrode. An ultrasonic motor has a fingertip that comes into contact with electrode holder, and moves electrode holder in a driving direction by moving the fingertip in an annular manner at an ultrasonic-range frequency. A roller bearing guides the movement of the electrode holder in the driving direction. A control circuit controls a position of the electrode in the driving direction by driving the ultrasonic motor, and moves the electrode holder based on an abnormality occurring in resistance against the movement of the electrode holder in the driving direction such that the electrode holder is moved by a movement distance equivalent to when the largest roller element among a plurality of roller elements of the roller bearing rolls and rotates once without sliding or longer.

Methods of etching metal by depositing a material reactive with a metal to be etched and a halogen to form a volatile species and exposing the substrate to a halogen-containing gas and activation gas to etch the substrate are provided. Deposited materials may include silicon, germanium, titanium, carbon, tin, and combinations thereof. Methods are suitable for fabricating MRAM structures and may involve integrating ALD and ALE processes without breaking vacuum.

In the present invention, when performing electrical discharge machining on a workpiece via an electrical discharge machine that has an electrode holder and an electrode guide, a workpiece model and an electrode-guide model are generated in advance, an interference-start position at which the electrode-guide model starts interfering with the workpiece model when the electrode-guide model is moved towards the workpiece model along an axis line (CLa) is calculated, and a position obtained by moving the electrode-guide model a prescribed distance away from the workpiece model, starting at the interference-start position, is set as an electrode-guide position. With the electrode guide positioned at the electrode-guide position, the electrode holder is moved downwards in order to move an electrode downwards toward the workpiece surface, and electrical discharge machining is performed on the workpiece.

A method of making a light weight component is provided. The method including the steps of: forming a metallic foam core into a desired configuration; applying an external metallic shell to an exterior surface of the metallic foam core after it has been formed into the desired configuration; and attenuating the component to a desired frequency by forming a plurality of openings in the external metallic shell.