Abstract: In a gas-turbine-stator-vane insert removing device with which welding metal that connects an insert collar, which protrudes outward from an outer circumferential surface of an insert, and a stator-vane-outer-shroud non-gas path surface, which surrounds the periphery of the insert collar, is removed by means of an arc discharge repeated at a short cycle between an electrode and a gas-turbine stator vane, a bottom surface of the electrode has the same plan-view shape as a plan-view shape of the welding metal.

Abstract: The invention relates to a device (10) for electrochemically removing a surface of a component (2), in particular a blade of an integrally bladed rotor, comprising at least one electrode (12), which has an outer contour that corresponds to a surface of the component to be produced, and a hydraulic pressure device (14), which has a pressure piston (16) coupled to the electrode (12) and a hydraulic chamber (18) in operative connection with the pressure piston (16) for receiving the hydraulic medium, wherein the pressure piston can be loaded with an actuating force and moved relative to the hydraulic pressure device (14) by means of the hydraulic medium, wherein the hydraulic chamber (18) is fluidically encapsulated relative to the pressure piston (16). The invention further relates to a method for electrochemically removing a surface of a component (2).

Abstract: An erosion device and a corresponding method are disclosed for machining a hollow-cylindrical workpiece, wherein the device is elongated and/or formed in the manner of a tube or cylinder and is characterized in that at least two rotationally acting drives (A1, A2), each with a drive shaft (AW1, AW2), and also an erosion electrode (E), interacting with the drives (A1, A2) and formed in the manner of a ring or disc, are provided.

Abstract: An electro discharge machining system includes a guide having first and second portions that are non-colinear with respect to one another. A consumable electrode is housed within the guide and configured to drill cooling holes in a component. A controller is programmed to position the guide and electrode to a desired position with respect to the component. An electro discharge machining guide includes first and second portions that are non-colinear with respect to one another and that include a passage configured to receive an electrode.

Abstract: Erosion electrodes and associated devices, systems, and methods for providing improved performance during a process driven by FEED and facilitated by fluid flushing of a worksite is disclosed. Use of erosion electrodes having varying cross-sectional geometries result in customizable channels, within which the FEED process may proceed, improving efficiency and efficacy of the process as the erosion electrode is advanced longitudinally into a work-piece.

Abstract: The invention relates to a machine for machining a part by micro-electrical discharge machining, said machine comprising a mechanism (44, 45, 46, 48) for modifying the configuration of the machine so as to alternatively and reversibly switch from a machining configuration to a sharpening configuration in which the tip of a same etching electrode (20) and another electrode (64) are dipped in an electrolyte bath in order to sharpen the tip of the etching electrode by electrochemnical corrosion.

Abstract: An electrode wire for electro-discharge machining includes a core wire including a first metal including copper and having one of phases ?, ?+??, and ??, a first alloy layer formed at a boundary region between the core wire and a second metal plated on an outer surface of the core wire due to mutual diffusion between the core wire and the second metal and having a phase ??, and a second alloy layer formed due to diffusion of the first metal to the second metal and having a phase ? and/a phase ?. A core wire material is erupted onto a surface of the electrode wire for electro-discharge machining, which includes the core wire, the first alloy layer, and the second alloy layer, along cracks appearing on the second alloy layer, so that a plurality of grains are formed on the surface of the electrode wire.

Abstract: To provide an electrical discharge machine in which a wire electrode can be angled in the left-right direction (u direction) and the front-back direction (v direction), an electrical discharge machine according to an embodiment of the present invention includes a lower support part (2) provided to a tilt shaft (4) rotatable and extending horizontally and an upper support part (3) provided to a forward/backward shaft (5) extending parallel to the tilt shaft (4) from a support column (42) provided vertically to the tilt shaft (4) and movable forward and backward in the extending direction, in which the lower support part (2) includes a lower guide roller (21) that rotates in a tilting plane in which the tilt shaft (4), the support column (42), and the forward/backward shaft (5) lie, the upper support part (5) includes an upper guide roller (31) that rotates in the tilting plane in which the tilt shaft (4), the support column (42), and the forward/backward shaft (5) lie, and a wire electrode (1) is suspended aro

Abstract: A system for repairing a component is provided. The system includes an electrochemical machining unit and a tool delivery apparatus. The electrochemical machining unit includes an electrode, a power supply configured to energize the electrode and the component, and a machining solution source configured to pass a machining solution between the component and the electrode. The tool delivery apparatus includes a number of linkage elements pivotally connected and configured to carry the electrode. The tool delivery apparatus further includes an actuation element configured to actuate the linkage elements to move the electrode. A tool delivery apparatus and a method for repairing a component disposed within a case are also presented.

Abstract: A machine tool for separative machining of preferably plate-like workpieces, for example, metal sheets, has a workpiece support and a discharge device on the workpiece support. The discharge device discharges workpiece parts produced as products of the separative machining. The discharge device includes two opening sections are adjustable relative to one another in the horizontal Y direction to form a through-opening for discharge of workpiece parts. The opening sections are adjustable into different positions relative to one another in the horizontal Y direction, to form through-openings of different widths for discharge of workpiece parts.

Abstract: A spark erosion tool (101, 102) is defined which comprises an electrode (301, 302) arranged on a tool longitudinal axis (2) and an electrode holder (401 . . . 417) aligned along the tool longitudinal axis (2) and arranged on the latter and connected to the electrode (301, 302). The electrode holder (401 . . . 417) comprises means for moving the electrode (301, 302) relative to the electrode holder (401 . . . 417) and means (6, 11, 12, 13, 15) for applying pressure acting transversely to the tool longitudinal axis (2) in the area of an imaginary hose (7) extending in the tool longitudinal axis (2), which has a cross section corresponding essentially to the electrode (301, 302). Furthermore, a method is defined of how the spark erosion tool (101, 102) can be used. In addition, an electrode (302) is defined for a spark erosion tool with a cylinder surface or a spherical surface, in which at least one groove (35) connected to a bore (36) is arranged.

Abstract: A device and method for removal of fasteners by force-less electrical erosion and disintegration (“FEED”) such that portions of the fastener, such as a flange, may be separated from other portions of the fastener, such as a shank and sleeve, further facilitate removal of the same. The device and method may be applied to fasteners having a rotationally loose fit within the sleeve.

Abstract: An electrical discharge assembly for processing a workpiece having a cooling passage with first and second portions includes a first electrode having a first shape for machining the first portion of the cooling passage and a second electrode having a second shape for machining the second portion of the cooling passage. In a method for repairing cooling passages in a workpiece, a first electrode having a first shape is positioned in a cooling passage. The first electrode is electrically powered to machine a first portion of the cooling passage. A second electrode having a second shape is positioned in the cooling passage. The second electrode is electrically powered to machine a second portion of the cooling passage.

Abstract: In electro-discharge machining by using an electro-discharge machining electrode of a Cu(Ag)—W(Mo) material, the machining speed, the electrode wear ratio, and the surface roughness of a work piece are improved. For this purpose, to the Cu(Ag)—W(Mo) material, borates of an element selected from a group (M3) consisting of Mg, Ca, Sr, Ba, Sc, Y, and lanthanide and an iron group metal are added by appropriate amounts. As the borate compounds, particularly, it is preferred to use borate compounds expressed by M32B2O5 and M3B2O4.

Abstract: An electric discharge apparatus includes electrode specification input means for inputting each electrode specification of a plurality of integral electrode where electrodes corresponding to a plurality of machining forms are arranged continuously on the same axis, machining detail input means for inputting data of a workpiece when electric discharge machining is performed using the integral electrode, and a machining program generation means for generating a machining program consisting of machining start position and a machining depth when electric discharge machining is performed using each electrodes based on the electrode specification and the thickness data of the workpiece thus input.

Abstract: In the wire electric discharge machine, a heat resistant tube in which a wire electrode is inserted and a coil which is wound around the heat resistant tube and causes high frequency dielectric heating are arranged on a downstream side of a device which applies the tension to a wire electrode led from a wire bobbin but on the upstream side of an upper guide portion. Further, a turn density of the coil in a section (annealing section) of the heat resistant tube close to the inlet of the wire electrode is made lower than a coil turns density in a section (fusing and cutting section) close to an outlet of the wire electrode.

Abstract: A triaxial driving device for electrodischarge machine tools having a three-liners-axes mechanism and an electrode tool and has a connecting mount, a first axial rotator, a base, a supporting arm, a second axial rotator, a third axial rotator and an electrode holder. The connecting mount is connected securely to the three-liners-axes mechanism. The first axial rotator is mounted in the connecting mount and has a rotating head. The base is connected securely to the rotating head of the first axial rotator and has a space. The supporting arm is rotatably mounted in the space of the base and has a connecting frame. The second axial rotator is securely connected to the base and the supporting arm and has a rotating head. The third axial rotator is connected to the supporting arm and has a rotating head. The electrode holder is connected to the third axial rotator and the electrode tool.

Abstract: A wire electric discharge machining apparatus includes a wire electrode, a guide roller that arranges wire electrodes in parallel by winding the wire electrode therearound, a plurality of slidable contact conductors that are in slidable contact with the wire electrodes arranged in parallel, respectively, and a power feeding jig that holds the slidable contact conductors individually and feeds power individually to the wire electrodes arranged in parallel via each of the slidable contact conductors, in which the power feeding jig includes a plurality of reference surfaces that determine a fixing interval between the slidable contact conductors.

Abstract: The present invention relates to a conductive nanostructure, a method for molding the same, and a method for manufacturing a field emitter using the same. More particularly, the present invention relates to a field-emitting nanostructure comprising a conductive substrate, a conductive nanostructure arranged on the conductive substrate, and a conductive interfacial compound disposed in the interface between the conductive substrate and the conductive nanostructure, as well as to a method for molding the same, and a method for manufacturing a field emitter using the same.

Abstract: Devices and methods for removal of fasteners by Electro-discharge Machining (EDM) such that portions of the fastener, such as a flange head, may be separated from other portions of the fastener, such as a shank.

Abstract: A method of manufacturing an electrode for electrical-discharge surface treatment includes kneading a first electrode material composed of at least one of metal powder and insulating powder and a second electrode material composed of conductive organic bonding agent in which a conductive resin is dissolved or dispersed in a solvent, to fabricate a slurry; molding the slurry, to form a compact; and desiccating the compact at a temperature below a thermal decomposition initiating temperature at which a thermal decomposition of the conductive organic bonding agent starts.

Abstract: In a torque motor driving device for wire cut electrical discharge machines, a voltage waveform rectified by a full-wave rectifying circuit, not using a high-capacitance electrolytic capacitor, is applied as an AC voltage to a single-phase torque motor by a bridge circuit including semiconductor switches. A PWM signal whose duty is adjusted so that the current flowing through the torque motor matches an instructed value is generated and the generated PWM signal is used for the operation of the bridge circuit.

Abstract: A grinding machine for grinding a workpiece comprises a machine frame, a bearing device provided on the machine frame and movable along guides, in which a cup-shaped grinding wheel is rotatably drivable about a grinding wheel axis and electrically insulated. The grinding wheel is electrically connected to a generator. The device for profile dressing, sharpening and cleaning the grinding wheel consists of a single cup-shaped electrode, which is drivable about its central axis and is placed on a slide, which allows a working gap to exist between the machining surface of the cup-shaped electrode and the annular abrasive surface. A spark erosion discharge occurs in the gap when a voltage is applied. The grinding wheel can thereby be optimally conditioned by electric discharge machining.

Abstract: An apparatus is configured for use with an electrode and a CNC machine tool. The apparatus includes a holder configured to hold the electrode in a position projecting outward from the holder, and a pull stud configured to mount the holder on the CNC machine tool. The apparatus further includes a driving mechanism that is operative to provide a motive force, and a coupling configured to couple the holder with the driving mechanism when the holder is not mounted on the CNC machine tool. The holder is configured to transmit the motive force from the coupling to the electrode in the holder to move the electrode outward of the holder.

Abstract: An electrode wire for electro-discharge machining and a method for manufacturing the same. The method includes preparing a wire rod, which includes a first metal and has a first diameter, as a core wire, plating a second metal on the core wire, performing a fine wire process for the core wire plated with the second metal so that the core wire has a second diameter, while forming a corrugation having a predetermined pattern on a surface of the core wire having a second diameter, and performing a heat treatment process to form a first alloy layer at a boundary surface between the core wire and the second metal through a mutual diffusion between the core wire and the second metal, and to form a second alloy layer at an outer portion of the first alloy layer through diffusion of the first metal toward the second metal.

Abstract: The electrode wire according to the invention comprises a brass core (1) covered with a ? phase brass coating (2) having a structure fragmented into blocks (2a) between which the core (1) is exposed. The blocks (2a) have a thickness (E2) with a narrow distribution and produce a coverage of the core (1) according to a coverage rate greater than 50%. This produces a regular fragmentation of the coating, which improves the finish state of the machined parts.

Abstract: Disclosed are an electrode wire for electro-discharge machining and a method for manufacturing the same. The electrode wire includes a core wire including a first metal including copper, a first alloy layer formed at a boundary region between the core wire and a second metal plated on an outer surface of the core wire due to mutual diffusion between the core wire and the second metal, and a second alloy layer formed due to diffusion of the first metal to the second metal. A core wire material is erupted onto a surface of the electrode wire for electro-discharge machining, which includes the core wire, the first alloy layer, and the second alloy layer, along cracks appearing on the second alloy layer, so that a plurality of grains are formed on the surface of the electrode wire.

Abstract: An EDM spindle assembly is provided comprising a pull stud, an electrode holder, a fluid seal, and a seal holder. A threaded outside diameter of the seal holder is threadedly engaged with a threaded inside diameter of a counter bore formed in the tail end of the electrode holder. A threaded outside diameter of the pull stud is threadedly engaged with the threaded inside diameter of the counter bore. The threaded inside diameter of the counter bore in the electrode holder comprises a longitudinal threading dimension that is sufficient to accommodate the entire longitudinal threaded outside diameter of the seal holder and a portion of the longitudinal threaded outside diameter of the pull stud sufficient to create threaded engagement, with the fluid seal positioned in the seal accommodating space.

Abstract: The invention relates to a method for electrical discharge machining of electrically non-conductive material in which a layer of an electrically conductive substance is applied as an auxiliary electrode on the electrically non-conductive material. Said method is characterized in that the electrically conductive substance is chemically converted by oxidative heat treatment after electrical discharge machining.

Abstract: An electrode for machining a pattern in a workpiece has a conductive body with a lattice of closed cells and a plurality of open cells. The open cells are positioned at an edge of the lattice of closed cells. The closed cells are defined by interconnected webs, and the open cells are defined by fins extending from the interconnected webs. A thickness of the fins is less than a thickness of the webs. In use, the electrode is positioned at a plurality of locations on the workpiece, such that a position of the fins of the electrode at each location overlaps a position of the fins of the electrode at an adjacent location. The pattern is formed at each of the plurality of locations by passing electrical charges repeatedly between the electrode and the workpiece and advancing the electrode into the workpiece.

Abstract: An electrode for EDM.

Abstract: An electrode tube holding apparatus is mounted to an electric discharge machine (EDM). The holding apparatus is slidable upward and downward along with the spindle of the EDM and maintained within the midsection of an electrode tube for reducing the deformation of the electrode tube during its movement.

Abstract: In accordance with one embodiment of the present disclosure, an electrical discharge machine is provided comprising an EDM electrode, an electrode holder, and an electrode guide. The electrode guide comprises an internal passage profile that transitions along the machining axis from a substantially circular cross section comprising a diameter d2 to an apexed cross section. The EDM electrode extends from the electrode holder through the electrode entrance aperture of the electrode guide and out of the electrode exit aperture of the electrode guide. The apexed cross section of the electrode guide is aligned relative to the circular cross section of the electrode guide such that apexes of the electrode exit aperture lie outside of a circumferential portion of the circular cross section. A restricted circumferential portion defined by the apexed cross section comprises a diameter that is greater than the effective electrode diameter. Additional embodiments are disclosed.

Abstract: [Problems] To provide an electrode which enables obtaining a die including thin or narrow slits by electric discharge machining and which does not easily cause breakage or deformation in the die during the electric discharge machining. [Solution] By providing a honeycomb electrode 120, i.e., an electrode for a honeycomb structure forming die including a thick plate-like electrode base body 122 made of an electricity discharging material and having two main surfaces, only one surface 127 of two main surfaces of the electrode base body 122 is provided with a plurality of electrode cells 142 partitioned by electrode partition walls 141, and a shape of the electrode cells 142 in the one surface 127 is analogous to that of flow-through cells of the honeycomb structure.

Abstract: An electrode holder having a replaceable guide through which an electrode extends longitudinally between an inner end operatively associated with an EDM machine and a free end engageable with a working surface of a component to be machined.

Abstract: A wire electric discharge machining apparatus includes guide rollers and a single electrode wire that is wrapped around each of the guide rollers to form cut wire portions that are spaced from one another between pairs of the guide rollers. A processing power supply feeds electric power to the individual cut wire portions through a power feed element. A high frequency insulator includes wound coils of the electrode wire that are located between adjacent cut wire portions, and cores which close respective magnetic circuits of the individual coils. The magnetic circuits are magnetically insulated from one another. The power feed element is arranged between the individual cut wire portions and the individual coils, and the individual cut wire portions are insulated from one another at high frequencies by the individual coils. Voltages are impressed on the individual cut wire portions independently, so discharges can be generated simultaneously, in parallel.

Abstract: A method for manufacturing integrally bladed rotors (preferably gas turbine rotors) is provided. The method includes the steps of a) providing a basic rotor body; b) placing the basic rotor body into an electrolyte; c) electrochemically machining the basic rotor body by simultaneously manufacturing a plurality of unmachined blades; and d) subsequently machining the unmachined blades to provide hydrodynamic surfaces, in particular a suction side and a pressure side, in the area of each unmachined blade.

Abstract: A wire transmitting module, disposed inside a Wire Electrical Discharge Machining (WEDM) apparatus having a roller set for providing a wire electrode, is disclosed, which comprises: a negative pressure generating device and a cylinder, being arranged for enabling the wire electrode to be drawn by the negative pressure of the negative pressure generating device so as to be sucked into the wire transmitting module automatically. When the diameter of the wire electrode is thinner than 0.1 mm, it may be too soft to be fed into the cylinder manually as it can easily be affected by airflow or static. Thus, by using the wire transmitting module for enabling the wire electrode to be sucked by the negative pressure and thus being fed into the cylinder, the electrode feeding efficiency can be greatly improved.

Abstract: An electric discharge machining (EDM) device includes a circular blade, a motor coupled to the circular blade for rotating the circular blade, and an electric discharge control system operatively coupled to the circular blade and a workpiece. The electric discharge control system causes the rotating circular blade to cut the workpiece using electric discharge machining. The device allows for removal of large chunks of material using EDM, minimizing the number of cuts, time and energy required to create a part.

Abstract: In a molding die machining electrode, slit grooves of a molding die are machined with a slit groove forming part having a substantially circular outer circumference by arranging hexagonal erected wall parts in a row; while the inner circumference of a slit groove forming part overlaps with the erected wall parts in the outer circumference of the slit groove forming part, the outside slit grooves are machined with the slit groove forming part having a substantially circular outer circumference. The further outside slit grooves are machined with the slit groove forming part of the third electrode. A plurality of the slit groove forming parts are radially divided and overlapping portions between the plurality of the slit groove forming parts are formed substantially coaxially with a molded body. The areas of the slit groove forming parts are designed to nearly similar values, suppressing the difference in wear of the electrodes.

Abstract: A method is provided for milling a thermal barrier coated metal part. This method includes selectively removing a portion of a ceramic coating using a mechanical cutting tool, thereby forming a counterbore, and machining the metal part through the counterbore. A drilling head for drilling thermal barrier coated metal parts is also provided. The drilling head comprises a mechanical cutting tool, which is operable to mill through ceramic, and an electrode for electrical discharge machining. The electrode may be used to mill the metal part, and may be interchangeable with the mechanical cutting tool.

Abstract: An EDM die sinking device includes a tank for holding a fluid, and at least one electrode in the tank having a shape for imparting to a first portion of a workpiece. A workpiece holder positions the workpiece at least partially immersed in the fluid and alternately moves the workpiece between an inoperable position and a first operable position of the first electrode at which electric discharge machining occurs on the first portion. A pulse generator creates an electric discharge between the first portion and the first electrode to remove material from the first portion in response to the workpiece being in the first operable position. Movement of the workpiece from the electrode flushes particle containing fluid away from the workpiece and the electrode. A segmented electrode includes a separate pulse generator for each segment may also be employed.

Abstract: An electrode used to form a film cooling hole in an air cooled turbine airfoil using the electrode discharge machining process. The electrode includes a number of film hole forming projections each having a metering hole forming section and a diffusion forming section. The diffusion forming section has a trapezoidal shape in which two sidewalls have both an outward expansion and are slanted outward to form a convergent diffusion or slanted inward to form a divergent diffusion.

Abstract: A boring cutter body (5) is inserted into a circular hole (3) and is rotated and moved in an axial direction, whereby screw-shaped groove parts (11) are formed by using a tool bit (9) provided on a tip end of an outer peripheral portion, and broken surfaces (15) are formed by breaking tips of ridge parts generated by formation of the groove parts (11). Moreover, the groove parts (11) are processed through electric discharge machining using a wire electrode (17) provided to the boring cutter body (5) behind the tool bit (9) in the rotating direction, thereby forming finely roughened portions (41) having more finely roughened shapes than the broken surfaces (15).

Abstract: A wire material having a copper-zinc alloy layer, which is formed by action of thermal diffusion, and a zinc layer on its circumference surface is subjected to processes, including from a step of drawing the wire material to a step of reducing the diameter of the product, to reliably crash the copper-zinc alloy layer into particles. The particles are embedded in the circumference surface of a core to integrate the diffusion alloy layer and zinc layer with the core and prevent the diffusion alloy layer and zinc layer from falling off from the core. In addition, in order to cover cracks formed in the copper-zinc alloy layer during wire drawing with a zinc thin film, wire drawing is performed at temperatures appropriate for maintaining good malleability and ductility of zinc.

Abstract: A device and method for removal of fasteners by Electro-discharge Machining (EDM) such that portions of the fastener, such as a flange, may be separated from other portions of the fastener, such as a shank.

Abstract: A cutting tool assembly using a machined tool operating in a plunge mode of electrical discharge machining to make microreplicated features in a work piece having a complex surface. The microreplicated features can be non-adjacent and can have any geometric configuration and micron-scaled dimensions, as determined by the microstructured features in the tool. The machined work piece can be used as a master tool in order to make microreplicated articles such as optical films, friction control films, plasma display panel molds, or micro-fasteners.

Abstract: There is provided a method for manufacturing a honeycomb structure forming die including a liquid groove forming step for forming linear processing liquid grooves 3 whose width is smaller than that of the slit 5, in positions for forming the slits 5 for forming the partition walls 41 of the honeycomb structure 40 by subjecting the kneaded clay to extrusion in one side end face 7 as a kneaded clay forming face 17 of a plate-shaped die substrate 2. An introduction hole forming step for forming introduction holes 4 for introducing the kneaded clay is performed before or after the liquid groove forming step. Slits 5 communicating with the introduction holes 4 are formed by performing comb-like electro-discharge machining by a comb-like electrode 21 where plate-shaped protrusion electrodes 23 corresponding with the slit 5 width are disposed in positions including the processing liquid grooves 3.

Abstract: A wire guide housing (1) which contains a wire guide (6) for supporting a running wire electrode (W) and in which a wire running passage (32, 23b, 41, 26, 63, 66a) through which the wire electrode passes is formed. The wire guide housing includes: a cleaning liquid supply opening (43), for introducing a cleaning liquid (C) into the wire guide housing; a cleaning liquid discharge opening (44), for discharging the cleaning liquid from the wire guide housing; a first flow passage (46), for connecting the cleaning liquid supply opening to the wire running passage; and a second flow passage (48), for connecting the wire running passage to the cleaning liquid discharge opening. The cleaning liquid flows into the wire running passage at a side more upstream than the wire guide.

Abstract: In order to produce a wire electrode having a core consisting of a copper/zinc alloy and to produce a specific sheath layer, the sheath layer is coated onto the core at a temperature at which no diffusion occurs. The wire electrode is subsequently heated at a heating speed higher than 10° C. per second, briefly annealed at temperatures above 500° C. and subsequently cooled again very rapidly at cooling speeds higher than 10° C. per second.