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8168914 |
Electric-discharge-machining power supply apparatus and electric discharge machining method
In an electric discharge machining, in order to reduce damage of an object to be machined and an electrode and to achieve machining velocity enhancement and reduction of electrode wear amount by...
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8168913 |
Electric discharge machining die sinking device
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...
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8143550 |
Device for controlling the on and off time of the metal oxide semiconductor field effect transistor (MOSFET), a device spark coating the surfaces of metal workpiece incorporating the said control device and a method of coating metal surfaces using the said device
The present invention is a device for coating surfaces of metallic work pieces with an electrically conductive material by employing short duration high current packets of pulses in which the work...
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8134096 |
Power supply-control device for electrical discharge machining apparatus
A power-supply control device includes a high-frequency component detecting unit, a machining voltage level detecting device, and a pulse control device. The high-frequency component detecting unit...
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8093528 |
Method and device for electrical discharge machining
A method for electrical discharge machining a workpiece includes dividing machining time into a sensing interval during which reference values are captured from machining pulses and into a...
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7947918 |
Method and generator for electrical discharge machining
The invention relates to a method and a generator for generating a time sequence of discharge pulses separated from each other by pulse pauses for electrical discharge machining. At least two pulse...
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7824526 |
Adaptive spindle assembly for electroerosion machining on a CNC machine tool
An apparatus and method for adapting a CNC milling machine for electroerosion machining. The apparatus includes a tubular electrode on the distal end of an adapter shaft. A tool holder on the...
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7816620 |
Method and generator for electrical discharge machining
The invention relates to a method and generator for generating a time sequence of EDM pulses having a predefined ignition voltage for electrical discharge machining. An AC voltage is generated from...
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7812277 |
Method and generator for electrical discharge machining
The invention relates to a method and a generator for generating a time sequence of discharge pulses for EDM machining wherein a pulse capacitor (22) for generating the discharge pulse is charged...
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7692114 |
Method and device for producing an internal thread by automatically machining in a bore
The invention relates to a method for producing a thread in a bore (2) by remote automatic machining characterized in that the method consists in introducing into the bore (2) an electrode (11)...
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7645958 |
Electric-discharge-machining power supply apparatus and small-hole electric-discharge machining apparatus
In order to obtain an electric-discharge-machining power supply apparatus that can flow discharge current pulses through the machining gap uniformly and efficiently, and can realize reduction of...
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7582842 |
Method and apparatus for generating machining pulses for electrical discharge machining
An apparatus and a method of generating machining pulses for electrical discharge machining by discharge of at least one line applying a voltage to a working gap formed between a machining...
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7528340 |
Apparatus and method for electric discharge machining and method of discriminating electric discharge
An electric discharge machining apparatus comprises a power supply (5) for applying a voltage to a work gap formed between a tool electrode (E) and the workpiece (W) and a motor (7) that moves the...
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7268314 |
Discharge-processing power source device
A power supply device for electric discharge machining includes a switching circuit that supplies a discharge pulse current to an inter-electrode portion that is a portion between an electrode and...
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7214900 |
Electrical discharge machine power supply
An electrical discharge machining apparatus includes a work electrode adapted to support a work immersed in a working fluid, a tool electrode located opposing the work electrode with a...
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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...
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7109432 |
Electric power unit for machining of wire electric discharge machine
The electric power unit for machining of a wire electric discharge machine includes an electric discharge state discriminate or (1a) for discriminating a state of electric discharge generated...
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7045735 |
Machining power supply for wire electrical discharge machine
Machining electrical power supply device for wire electrical discharge machining. Includes an electrical discharge state distinguishing circuit (6) for distinguishing at least two inter-electrode...
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6998563 |
Carbon nanotube apparatus for surface discharge polishing
A carbon nanotube apparatus for surface discharge polishing using a transistor discharge circuit includes a signal generator having a integrated circuit for generating square wave; a photo coupler...
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6958460 |
Device for machining by electroerosion
The device for machining by electroerosion comprises an electrode-tool (EO) and an electrode-workpiece (EP) constituting the opposite poles of a working gap (GA) and an electrical circuit with a...
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6946615 |
Method and system for electric discharge machining insulating material or high resistance material
An electric discharge machine for machining a workpiece (2a) made of insulating material or other materials comprises: a first comparison member (17) for comparing voltage (V) between the...
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6933457 |
Method and apparatus for electrical discharge machining of a workpiece
A method and apparatus for electrical discharge machining of a workpiece wherein an erosion pulse is applied on the tool electrode. During the time of the erosion pulse the voltage (Ue) set on the...
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6930273 |
Power supply unit for wire electrical discharge machining and method of wire electrical discharge machining
A power supply unit for wire electrical discharge machining using an ac high-frequency power supply for applying an ac high-frequency voltage between a wire electrode (1a) and a workpiece (2)...
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6903297 |
Wire electric-discharge machining method and device
A wire electrical discharge machining apparatus for machining a workpiece (2) by supplying discharge energy to a gap between a wire electrode (1a) and the workpiece (2) by a working-electric-power...
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6756557 |
Power supply for wire electric discharge machining
In a power source apparatus for wire electric discharge machining capable of applying voltages of both of positive and opposite polarities to a gap between a wire electrode (1a) and a workpiece...
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6727455 |
Power supply system for applying a voltage of both positive and negative polarities in electric discharge machining
In an electric discharge machining power supply system that can apply a voltage of both positive and negative polarities between an electrode and a workpiece, there is provided a controller that...
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6630641 |
Electric discharge machining apparatus generating preliminary discharge and machining discharge pulses
An electric discharge machining apparatus includes a wire electrode for machining a workpiece, and a first voltage applying unit for applying a voltage pulse. The voltage pulse has a rise time...
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6600125 |
Process parameter optimization in electrical discharge machining
A method and apparatus for electrical discharge or electrochemical machining of workpieces, in which a machining electrode is moved relative to a workpiece, the machining is performed in cycles,...
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6580048 |
Electrical discharge machining apparatus supplying initial and processing currents
Charge accumulated in a capacitor is used to provide a processing current flow between a target and an electrode. When a diode is turned on, a first dc power supply is used to provide the...
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6469522 |
Electrical discharge state detecting device for electrical discharge machining machine
An electrical discharge state detecting device for an electrical discharge machining machine which detects an electrical discharge state during an electrical discharge machining operation. The...
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6465754 |
Process and device for machining by electroerosion
The process and device for machining by electroerosion are arranged so as to produce during each erosive discharge the following succession of phases: a delay phase (tD) during which an alternating...
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6452416 |
Abnormality detecting apparatus for a rotating electric machine
An abnormality detecting apparatus in which noise is rejected in determining the condition of each of rotating electrical machines, so that a partial discharge of a rotating electric machine is...
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6429396 |
Electric discharge processing power supply having a protection network for the switching element
A power supply for an electric discharge machine which provides electrical power intermittently for discharge machining in a machining gap formed between an electrode and a work piece. The power...
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6423920 |
Electric discharge machining power supply, and electric discharge machining method
A power supply (100) and a method for electric discharge machining by repeatedly providing a current pulse to a working gap (3) formed between a tool electrode (1) and a workpiece (2) includes a...
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6392183 |
Process and device for machining by electroerosion
In the process of machining by electroerosion, there is adjusted during a first transitory phase the machining current increase of the discharges after triggering a discharge between the electrode...
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6259053 |
Method and apparatus for controlling the position and power of electrodes in an electric-discharge texturing machine
A method and apparatus for controlling the position and power of electrodes in an electric-discharge texturing (EDT) machine for texturing a roll includes an actuator for moving an electrode away...
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6252191 |
Method and apparatus for electrical discharge machining with intermittent electrical measuring
EDM according to the present invention involves an intermttent type of operation between erosion pulses and measurement pulses in order to circumvent an interfering self-control effect of an...
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6222149 |
Power supply device for electric discharge machining apparatus
A power supply device for electric discharge machining apparatus, for supplying power to a gap formed between a workpiece and a tool electrode comprises a d.c. power source, a bridge circuit...
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6169261 |
Apparatus and method for generating an electric discharge for use in the line cutting of a workpiece
An apparatus and method is provided for generating an electric discharge in an alternating direction on a workpiece for line cutting of the workpiece. In particular, the apparatus and method allows...
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6169262 |
Apparatus and method for enhancing the working efficiency of an electric discharging machine
An apparatus and method is provided for use on an electric discharging machine to enhance the working efficiency of the electric discharging machine. The apparatus and method are directed to the...
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6140600 |
Electric discharge machining apparatus
An electric discharge machining apparatus including a first power source for applying machining voltage to a machining gap to generate an electric discharge, a second power source for applying...
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6130395 |
Method and apparatus for achieving a fine surface finish in wire-cut EDM
A wire-cut EDM method and apparatus for machining to a fine surface roughness of 1 μm Rmax or less. Two power supplies and a electrode polarity switching system are used. A first high energy power ...
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6130510 |
Electric discharge machining power source unit for electric discharge machine
When a state for electric discharge is established, switching elements T2 and T3 are turned on so that a machining current J0 from a low-voltage auxiliary DC power source (2) flows between a...
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6107593 |
Power apparatus for wire electric discharge machine
A wire electric-discharge machining apparatus with recycled electric power is provided, which can recycle the energy stored in the inductor of the discharge circuit to be used as the power source...
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6084194 |
Method and apparatus for electric-discharge texturing ends of a roll
A method and apparatus for electric-discharge texturing (EDT) ends of a roll rotatably supported about a roll axis uses electrodes mounted on a head. The head is movable in a direction parallel to...
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5986232 |
Electrical discharge machining apparatus and electrical discharge machining method
An electrical discharge detector (30) which detects electrical discharge generated at a machining gap; a pulse generator (41) which generates a pulse signal which stops after the commencement of...
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5919381 |
Bipolar electrical discharge machine which detects misfire
An electrical discharge machine for applying a pulsed voltage to a machining gap between an electrode and a workpiece disposed opposite thereto. An insulating dielectric fluid, such as oil or water...
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5904865 |
EDM control by adjusting the on-time power level
A method of electrical discharge machining a workpiece, while maintaining the desired size, shape and surface finish of the cut. After an initial machining operation at an initial power setting...
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5897792 |
Power supply system for electrical discharge machining unit, and method for electrical discharge machining
A power supply circuit (8) incorporates a DC power supply (8A), a switching element (8B), and a diode (8C). A transformer (12) incorporates a ring core (13), a primary windings (13B), and secondary...
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5874703 |
Method and apparatus for impulse generator for electroerosive machining of workpieces
A method and apparatus for electroerosive machining (i.e. electric discharge machining) of workpieces is accomplished by supplying pulses of varying polarity to the gap between an electrode and a...
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