General Electric Company

Mark Joseph Gleason

Bin Wei

Peng Li

Terri Kay Brown

Christophe Jude Day

Jeffrey Francis Wessels

Clifford Edward Allen, Jr

Michael Joseph Gambone

Barry Joe Webb

William J Scott

Mark Douglas Ehresman

Barry T Malone

Darrin L Smith

Huiya Xu

Jason S Mogle

Michael D Simcox

Edwin D Tyler

Brian K Howell

William Charles Allison

Glenn Edward Ball

John Fitzgerald Zurawka

Clifford Edward Allen

An electro discharge machining apparatus comprises an electrode configured to machine a desired feature in a workpiece, a pulse generator configured to energize the electrode and the workpiece to opposite electrical polarities, a machining solution source configured to pass a machining solution between the electrode and the workpiece, and a servomotor configured to drive the electrode to move relative to the workpiece. The electro discharge machining apparatus further comprises at least one detection element configured to detect machining signals, and a controller. The controller controls the pulse generator and the servomotor to machine the workpiece according to a plurality of first process parameters predetermined therein and analyzes the detected machining signals to generate a first response signal to activate a plurality of second process parameters predetermined therein and different from the first process parameters to machine the workpiece. An electro discharge machining method is also presented.

Electro discharge machining apparatus and method

A method for making a test specimen includes machining out a chordal core from an annular forging and machining the specimen symmetrical about a chordal axis of the core. A linear cutting tool such as a wire EDM machine is used for the machining which includes at least a partially cylindrical cutting about the chordal axis with the linear cutting tool. A copper or brass tubular EDM electrode may be used. The chordal core may be machined from fat of the forging. The test specimen may have with a gauge section diameter in a range of 0.1-0.5 inches. The EDM process may include directing jets of machining fluid or dielectric in up and down along a cutting portion of an EDM wire of the EDM machine or performing the EDM process in a tank of machining fluid or dielectric with the annular forging submerged in the fluid or dielectric.

Extraction of chordal test specimens from forgings

An electrical discharge machine includes first and second coaxial electrodes and corresponding carriages. A liquid dielectric is channeled between the electrodes and a workpiece which are suitably electrically powered for machining a duplex hole in the workpiece.

Duplex electrical discharge machining

An electrical discharge machine includes a chuck for holding an electrode above a workpiece. A lower guide positions a tip of the electrode above the workpiece, and mid-guide laterally supports the electrode between its opposite ends for reducing flexing therebetween.

Flex restrained electrical discharge machining

In the electrochemical drilling of a hole completely through a workpiece, the present invention proposes operating the power supply in a current regulating mode. Initially, a hollow cathode is positioned adjacent to a workpiece in which one or more holes are to be drilled. An electrolyte is flowed through the cathode and against the workpiece. A constant electrical current is applied between the cathode and the workpiece across the electrolyte. Then the cathode is advanced at a constant rate toward the workpiece for the drilling of the hole(s), while maintaining the electrolyte flow and current substantially constant.

Method for controlling electrochemical drilling

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Madisonville, KY, United States of America

Mark Joseph Gleason