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| Number | Title | Issue Date |
| 7737381 | Electric discharge apparatus for controlling the length of a carbon nanotube This invention relates to a method and apparatus for controlling the length of a carbon nanotube, in cooperation with a substrate having at least one reference level on a surface of the substrate on which at least one carbon nanotube is formed, comprising at least o... | 06/15/2010 |
| 7465900 | Electrical energy discharge control Systems and methods presented herein provide for the control of electrical energy discharge from an electrode. In this regard, a sensor detects electrical energy discharged from the electrode and generates an electronic signal representative of a detected electrical... | 12/16/2008 |
| 7428444 | Method for under-sizing electrodes for polygonal orbit electric discharge machining A system, method, and computer program for designing an electrode for electric discharge machining, comprising identifying a cavity in a three-dimensional design; calculating a direct negative boolean of said cavity to define a general form for an electrode; determi... | 09/23/2008 |
| 7371989 | Wire electric discharge machine A wire electric discharge machine capable of taper machining with an improved accuracy. A reference wire correction amount d set in advance is determined to be a proper value for a wire-diameter correction amount for a speed control plane, and adjustment amounts for... | 05/13/2008 |
| 7323213 | Apparatus and method for discharge surface treatment An apparatus has a green compact electrode including a material of a coating formed on a workpiece by a discharge, a power source for supplying a first voltage, a voltage detector for detecting a voltage between the workpiece and the electrode, and a pulse current g... | 01/29/2008 |
| 7323654 | Electric discharge machining apparatus An electric discharge machining apparatus capable of precisely detecting the electric discharge in a case of performing machining by minute machining energy such as in finish machining. A voltage is applied between a tool electrode and a workpiece by repeating ON/OF... | 01/29/2008 |
| 7301116 | Programmed electrode wear compensation device and method for 3D EDM scanning apparatus A programmed electrode wear compensation device and method for 3D EDM scanning apparatus has a compensation device which receives raw data about a working path of a working apparatus from a CAD/CAM device, calculates therefrom compensated data which take into accoun... | 11/27/2007 |
| 7291800 | EDM electrode tool holder An electrical discharge machining assembly has a fixture that retains an electrode. The fixture has clamps to apply a clamping force to the electrode. A threaded member adjusts the compression of a spring to change the clamping force for each clamp. For each clamp, ... | 11/06/2007 |
| 7261796 | Method and apparatus for aligning a machine tool A machine tool is provided comprising a base, a slide assembly attached to the base for supporting a tool and translating the tool along an axis, and a workpiece holder attached to the base. At least one of the slide assembly and the workpiece holder are movable lat... | 08/28/2007 |
| 7262382 | Process of forming conical holes with an electrical discharge machining system An electrical discharge machine is configured to (i) machine at least a portion of a workpiece through electrical discharge between the workpiece and a first machining electrode aligned by the electrode guide; (ii) generate a dressed machining electrode by engaging ... | 08/28/2007 |
| 7202438 | Electrical discharge machining apparatus An electric-discharge machining apparatus for machining a workpiece by an electric discharge generated between a machining electrode and the workpiece, includes a correcting unit that corrects a machining amount input for machining the workpiece, based on a usage hi... | 04/10/2007 |
| 7119300 | Method and apparatus of asynchronous electric discharge machine for wire cut An apparatus of asynchronous electric discharge machine for wire cut adopted for use in machine industries employs a first electric discharge machine unit and a second electric discharge machine unit to provide electric energy to a cutting wire to generate alternate... | 10/10/2006 |
| 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 |
| 7030332 | Monitoring electrode condition in an electro-discharge machine A method and device for monitoring the condition of an electrode in an electro-discharge machine are disclosed. The device includes an electrode detector operable to produce a position signal indicative of the position of an end region of the electrode in the nose-g... | 04/18/2006 |
| 7015411 | Erosion system having an erosion head for removing metallic connection elements Spark erosion system for removing connection elements from a structure (W, 60), having a drill head (3) [(4)?], a rotational drive (10) by means of which a tool is caused to rotate, a positioning system (15) for moving the tool as ... | 03/21/2006 |
| 7002093 | Manual feed device in wire electric discharge machine A manual feeding device in a wire electric discharge machine in which selection between a jog feed and a step feed is made automatically without mode change. When an axis motion key is pressed, a timer measures the time for which the key is pressed. When the key is ... | 02/21/2006 |
| 6998562 | Controller for a wire electrical discharge machine Set feed speed is lowered when a short circuit is detected in a range within which machining is unstable, the range starting from the point at which discharge is detected after machining starts from a machining start point, thus control is carried our according to a... | 02/14/2006 |
| 6979795 | Sinker electric discharge machine jump control device A sinker electric discharge machine jump control device for reciprocating a tool electrode along a Z-axis with respect to a workpiece using a servo motor in order to expel contaminated fluid from a work gap. The jump control device includes a commanded current gener... | 12/27/2005 |
| 6969817 | Apparatus and method for machining in confined spaces A machining apparatus is provided. The machining apparatus includes a discharge machining head assembly and a slide assembly supporting the head assembly. The machining apparatus also includes an electromagnet configured to support the slide assembly in a position o... | 11/29/2005 |
| 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 |
| 6941187 | Multiple discharge-servo curve control method and device for an electrical discharge machine A discharge-servo curve control method and device for an electrical discharge machine enables multiple discharge-servo curves to be chosen during a machining process in real-time. The control device includes a storage unit, a setting unit, a reading unit, a program ... | 09/06/2005 |
| 6924453 | Machining control method for wire-cut electric discharge machine The number of electric discharge pulses is detected every given period. A deviation between the detected number and a target number of electric discharge pulses is obtained. Based on the obtained deviation, a correction value for the correction of a machining path i... | 08/02/2005 |
| 6920378 | Command generation combining input shaping and smooth baseline functions One preferred embodiment of the invention provides systems and methods for controlling a physical system by generating an input to the physical system that does not excite unwanted dynamics. Briefly described, one embodiment of the system among others, can be broadl... | 07/19/2005 |
| 6900407 | Electric discharge machine with reactive force compensated by jump locus adjustment In an electric discharge machine, wherein electric power is supplied between an electrode and a workpiece to machine the workpiece, a jumping motion is performed to temporarily increase a distance between the electrode and the workpiece. The electric discharge machi... | 05/31/2005 |
| 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 |
| 6832126 | Control apparatus for wire cut electric discharge machine In a wire cut electric discharge machine, a correction block is inserted into a corner of a movement path where the wire electrode is moved by the electrode moving device. The correction block does not correspond to the contour of the workpiece to be machined. When ... | 12/14/2004 |
| 6831246 | Multi-station electrical discharge machining with single velocity command An electrical discharge machining (EDM) apparatus includes a plurality of machining heads, at least one EDM control system, and a plurality of programmable servo drives. Each one of the programmable servo drives is connected to the EDM control system and to a respec... | 12/14/2004 |
| 6809285 | Micro electro discharge machining method and apparatus In a micro electro discharge machining method and apparatus, the shapes of minute holes are transferred to a tool electrode through a plate electrode serving as an intermediate electrode, and a workpiece is machined using the tool electrode. As a result, the time fo... | 10/26/2004 |
| 6730872 | Method of and apparatus for wire electric-discharge machining The wire electric-discharge machining apparatus is provided with an inter-pole voltage correction unit 109 which corrects a voltage corresponding to an inter-pole voltage according to a correction coefficient which increases with an elongation of discharge st... | 05/04/2004 |
| 6723942 | Automatic breakthrough detection device An automatic breakthrough detection device for drilling electric discharge machine is provided. The automatic breakthrough detection device utilizing the facts of the variations of high frequency spectrum components of the provided discharge voltage and the variatio... | 04/20/2004 |
| 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 |
| 6713706 | Jump control apparatus for electric discharge shaping/profiling machine A jump control apparatus for an electric discharge machine ensuring high machining precision while reducing machining time by removing sludge speedily, regardless of differences in shape among workpieces, includes a feed control unit for controlling a vertical posit... | 03/30/2004 |
| 6707304 | Devices and methods for detecting a processing electrode of a machine tool Devices and methods are disclosed for the contactless detection of a bar-shaped or wire-shaped processing electrode of a machine tool such as a spark erosion machine. The detection is based on measuring an impedance change in the measuring area, which is caused by t... | 03/16/2004 |
| 6667453 | Electric discharge machining method and apparatus with control of rocking function parameters In an electric discharge machining apparatus for performing machining while relatively rocking an electrode (18) and a workpiece (W) in a plane vertical to a machining feed direction, there is provided an electric discharge state detection device (20) for... | 12/23/2003 |
| 6642470 | Process and device for machining a three-dimensional piece by electroerosive milling An electroerosion machining device to machine a piece (14) by milling successive layers includes a member (30) to drive in rotation an electrode-tool (31) of tubular shape and a digital control unit (CN) to control the three-dimensional movement (x, y, z)... | 11/04/2003 |
| 6608275 | Jump control method and apparatus for electric An electric discharge machining device including an interelectrode servo control unit for controlling an interelectrode distance between an electrode and an object while applying a voltage across the electrode and the object, and a jump control unit for c... | 08/19/2003 |
| 6505091 | Method and apparatus for electrodischarge machining A detected value indicating a machining state is filtered and a machining gap between an electrode and a workpiece is adjusted by using a control variable obtained through the filtering. Therefore, machining speed can be improved by maintaining a stable m... | 01/07/2003 |
| 6448529 | Electro discharge machining apparatus A workpiece 7 is held on a table and moved in X and Y directions relative to a tool electrode 4, which is displaceable in a direction orthogonal to the X and Y directions. The position of the workpiece 7 to which it should be moved is calculated based on ... | 09/10/2002 |
| 6417475 | EDM electrode position detection The invention provides an apparatus and method for detecting an out-of-line electrode prior to the start of an electrical discharge machining (EDM) process. The invention involves positioning an electrically conductive test component in an accurately defi... | 07/09/2002 |
| 6385501 | Electric discharge machining control method and electric discharge machining controller An error signal is obtained from a reference value and a value indicating a detected state in machining, a first controlled variable is obtained by adding a value obtained by multiplying the error signal by a proportion gain to a value obtained by multipl... | 05/07/2002 |
