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| Number | Title | Issue Date |
| 8058582 | Electrical discharge machining apparatus and electrical discharge machining method An electrical-discharge machining apparatus for machining a workpiece using an aqueous machining fluid includes an insulator for electrically insulating a machine platen from the workpiece where the workpiece is placed. A machining-fluid-property measuring instrumen... | 11/15/2011 |
| 7795558 | Electric discharge machine and electric discharge machining method In an electric discharge machining apparatus that machines a workpiece (1) by using a water-based dielectric fluid as a dielectric fluid while a voltage is being applied to a machining gap between an electrode (2) and the workpiece (1), the elec... | 09/14/2010 |
| 7737380 | Electrical-discharge machining apparatus and method and apparatus for dielectric-fluid quality control A water purifying unit generates pure water by eliminating impurity ions from dielectric fluid. A corrosion-protection-ion generating unit generates corrosion protection ions, substitutes predetermined cations for impurity cations contained in the dielectric fluid, ... | 06/15/2010 |
| 7394040 | Electromachining process and apparatus An electromachining process and apparatus includes providing both high-speed electroerosion functions for rapidly rough finishing a workpiece and electrodischarge machining functions for fine finishing by first using a rotary electrode to implement the high-speed el... | 07/01/2008 |
| 7335848 | Process for production of die usable for formation of honeycomb structure A process for producing a die for forming a honeycomb structure having slits having hexagonal honeycomb cell shape 5 at one of surfaces 7 of a plate-like base material for die 2, and backside holes 4 each communicating with respective sli... | 02/26/2008 |
| 7291267 | Molecular separator The present invention discloses a method and apparatus for separating particles and dissolved matter from a fluid stream. Specifically, the present invention includes a first pressure source which transports untreated fluid into a separator annulus with a filter ele... | 11/06/2007 |
| 7291274 | Method of deionising and clarifying the aqueous medium used in an electrical discharge machine and the product used in said method Deionisation and clarification process of the aqueous medium used in an electroerosion machine and product for this process, where the electroerosion machines are comprised of a purification circuit for this aqueous medium, which includes an ion exchange phase betwe... | 11/06/2007 |
| 7282660 | Machining fluid level detection device for wire cut electrical discharge machines A table for placing a workpiece is grounded. An electrode for detecting machining fluid level is attached to an upper guide that guides the wire electrode, with the electrode insulated from the upper guide. A voltage is applied to the electrode, and the voltage betw... | 10/16/2007 |
| 7241962 | Electrical discharge texturing machine A low cost electrical discharge texturing machine which can texture work rolls having a broad range of diameters and lengths either on a production or research and development basis. The machine is relatively portable, for example, it can be mounted on a palate, and... | 07/10/2007 |
| 7202439 | Small-hole electrical discharge machining device and multiple diesinking-and-small-hole electrical discharge machining device, and method for multiple diesinking-and-small-hole electrical discharge machining with the same device A small-hole electrical discharge machining device comprises a diaphragm which can be moved up and down along a notch window provided in a work tank for mounting a work in the work tank in which a working fluid can be filled or discharged, and adjusts the height of ... | 04/10/2007 |
| 7201850 | Method for providing surface texturing of aluminum sheet, substrate for lithographic plate and lithographic plate According to the present invention, since the concavo-convex pattern of the embossing form is formed by electrical discharge machining, the peaks on the surface of the resultant embossing form are all of the same level or height, which enables the enhancement of the... | 04/10/2007 |
| 7126075 | Electro discharge machining a passage using a backing member A method and apparatus for electro discharge machining a passage through a work piece using a hollow electro discharge machining electrode and a corresponding flushing agent supplied via the hollow electrode. A backing member is positioned abutting the exit face of ... | 10/24/2006 |
| 7113884 | Positioning apparatus for an electrical discharge machine and a method therefor A positioning apparatus for an electrical discharge machine includes: a power supply 106 for applying a pulse voltage between an electrode 101 and a workpiece 102; a discharge detecting means 1108 for detecting the occurrence of electrica... | 09/26/2006 |
| 7078645 | Working liquid ejector of wire electric discharge machine A machining-fluid ejection device for a wire electric discharge machining apparatus includes a nozzle for ejecting machining-fluid into an inter-electrode gap between a workpiece (W) and a wire electrode (E), a casing (16) fixed to a machining head (15... | 07/18/2006 |
| 6967303 | Electrical discharge machine There is provided a controller(11) structured in such a manner that a signal of ON/OFF of electric power of the temperature control unit (7) is received by the signal receiving section (12), according to ON/OFF of the received signal of the sign... | 11/22/2005 |
| 6933456 | Small hole electrical discharge machining method and small hole electrical discharge machining apparatus and electrode inserting method and electrode inserting apparatus A small hole electrical discharge machining apparatus includes an electrode holder that holds an upper part of an electrode, an electrode guider that guides a lower part of the electrode, a jet nozzle that injects water jet to the electrode holder, and a fluid chann... | 08/23/2005 |
| 6897400 | Out flushing guide bushing A guide bushing for use in association with electrical discharge machining (EDM) apparatus including a rotatable electrode defining a longitudinal axis, is provided. The guide bushing includes a body portion defining a bore therethrough for receiving at least a port... | 05/24/2005 |
| 6844519 | Electric sparking drill and method for forming a hole with an electric spark An electric sparking drill and a method for using the same to drill a hole in a workpiece where at least one of a voltage applied to an electrode, the conductivity of a liquid applied between the electrode and the workpiece during drilling, and a gap between the ele... | 01/18/2005 |
| 6831245 | Wire electric discharge machining device A wire electric discharge machining apparatus has a wire guide upper unit for slidably retaining a wire electrode above a subject to be machined, a wire guide lower unit for slidably retaining the wire electrode below the subject, an arm member for retaining the wir... | 12/14/2004 |
| 6808604 | Discharge surface treatment electrode, manufacturing method thereof and discharge surface treating method WC powder (11) and W powder (12) are mixed and entered in a press mold and compressed and molded, thereby forming a discharge surface treatment electrode (10). Discharge is caused to occur between the discharge surface treatment electrode (10... | 10/26/2004 |
| 6800829 | Method and apparatus for repairing air-cooled airfoils Method and apparatus for repairing an article, such as an air-cooled component, during which at least a portion of the component must be removed and replaced. The method and apparatus make use of one or more workpiece holders adapted to secure and position an compon... | 10/05/2004 |
| 6791053 | Cad/cam device for electric discharge machine A CAD/CAM device for an electric discharge machine comprises a check unit (32) for checking whether or not a level (HC) of a clamp is lower than a safe level (HLS) of the machining solution surface before conducting actual machining. The... | 09/14/2004 |
| 6784395 | Electric discharge machine with changing processing parameters A wire-electrical discharge machine infuses a processing liquid in a gap between a wire and a workpiece and processes the workpiece using predetermined processing parameters. The machine includes a processing parameter memory that stores processing parameters, a sec... | 08/31/2004 |
| 6734384 | Electrical discharge machine apparatus with improved dielectric flushing An electrical discharge machining system for machining a workpiece. The system comprises a wire guide support for positioning and guiding a wire electrode into a desired position relative to the workpiece and a source of a liquid dielectric fluid. The supply also pr... | 05/11/2004 |
| 6717094 | Electrical discharge machine and methods of establishing zero set conditions for operation thereof Electrical discharge machines are disclosed that are capable of a relatively wide range of flexibility and range of motion for performing electrical discharge operations. The electrical discharge machine herein can optionally comprise up to, and in excess of six axe... | 04/06/2004 |
| 6686554 | Method of electrodischarge wire machining A method of wire electric discharge machining by which an electric discharge is generated in a gap between a wire electrode (1a) and a workpiece (2) so that the workpiece (2) is machined, includes the steps of: a first step in which electric discharge mac... | 02/03/2004 |
| 6683269 | Working fluid processing device of wire electric discharge machine For maintenance and management of filters in a wire electric discharge machine, a sensor for detecting the filtration pressure is disposed between the filter and pump in the working fluid circulation channel. The sensor periodically senses the pressure an... | 01/27/2004 |
| 6680454 | Electromachining with perforated electrodes A perforated electrode has strategically distributed flushing holes through which a flushing medium is discharged. The electrode can be used for either electrochemical machining (ECM) or electrodischarge machining (EDM). The flushing medium is either elec... | 01/20/2004 |
| 6642469 | Electrode clamping system for sink-type electrical discharge machines An electrode clamping system for an EDM-sinking system provides a two-sided dielectric fluid supply to a clamped electrode by placing supply channels in both the fixed and movable parts of the electrode clamping holder. An automatic control circuit contro... | 11/04/2003 |
| 6639172 | Method of and apparatus for wire electric discharge machining capable of machining the machining subject coarsely in a dielectric fluid and finely in a gaseous environment The wire electric discharge machining apparatus includes apparatus or generating a discharge in a gap between a wire electrode (1a) and a machining subject (2) to machine the machining subject. A gas supplying unit (8) supplies a pressurized gas in the ga... | 10/28/2003 |
| 6621033 | Electrical discharge machining apparatus A layered anisotropically conductive element, a resistant element, and a feed element constitute an electrode for discharge machining. The layered anisotropically conductive element includes high conductivity layers and low conductivity layers alternately... | 09/16/2003 |
| 6583376 | Sealing apparatus used in a wire cut electric discharge machine A wire cut electric discharge machine that includes a machining tank storing a machining fluid, an upper arm disposed at an upper portion of the machining tank, a lower arm inserted into the machining tank, a wire electrode extending between the upper arm... | 06/24/2003 |
| 6576858 | Small hole electrical discharge machining method and small hole electrical discharge machining apparatus A small hole electrical discharge machining apparatus, including: a slide base; a Z axis slide freely positionable in a vertical direction, the Z axis slide being provided on the slide base; an electrode holding member for holding an upper portion of a st... | 06/10/2003 |
| 6552291 | Wire electric discharge machine A wire electrical discharge machining apparatus provided with: a nozzle for spraying and supplying machining liquid, the nozzle being supported so that a state of the nozzle is switched over from a contact state with a work piece to a non-contact state wi... | 04/22/2003 |
| 6538226 | Load of particles for machining liquids for electro-erosion machines, its process of production, its use and machining liquid containing such a load The machining liquid includes a load of particles contained in a dielectric liquid. The particles are carbon microfibers, sectioned or not, having a diameter (e) comprised between 0.2 and 8 micrometers and a length which is a function of the machining gap... | 03/25/2003 |
| 6533927 | Liquid feeder for electrodischarge machining A dielectric fluid system (2) for an electric discharge machining apparatus includes an auxiliary tank (22) positioned at or higher than a work tank (12) and a dielectric fluid reservoir (21), a filter device (23), and a first pump (P1) and a second pump ... | 03/18/2003 |
| 6429395 | Leakproof device of wire cut machine A leakproof device of the work tank of a wire cut machine comprising a fixed plate fastened on the work tank, and a locating plate fastened with a lower arm of the wire cut machine. The fixed plate is provided in the fringe of a hollow portion thereof wit... | 08/06/2002 |
| 6407356 | Electrical discharge machining device An electric discharge machining device comprises a base, a support column, an oil bath, a work platform, a draining pipe, and a linear actuator. The base has an oil storage compartment. The oil bath has a receiving space and a drainage hole through which ... | 06/18/2002 |
| 6392182 | Machine tank for electric discharge machine A work tank (20) for an electric discharge machine includes a tank wall (21) having an opening in a front surface and surrounding a workpiece; a front door (31) horizontally movable between an unlock position, where the front door is vertically movable, a... | 05/21/2002 |
| 6384363 | Process for electric discharge machining and apparatus therefor There are described a process for electric discharge machining of a work, which uses deionized water containing no rust preventing agent, as working liquid, and an apparatus therefor. The electric discharge machining apparatus additionally has a high-freq... | 05/07/2002 |
