Back to results
US 4,347,425 AGranted
Wire-cut, electric-discharge machining power source
AssigneeFujitsu Fanuc Limited
InventorHaruki Obara
Life of this patent
Estimating the term…
Abstract
A wire-cut, electric-discharge machining power source which is provided with a first low-current discharge circuit and a second high-current discharge circuit. The first low-current discharge circuit makes a wire electrode positive and a workpiece negative, and the second high-current discharge circuit makes the wire electrode negative and the work positive. After triggering a discharge by the first low-current discharge circuit, a main discharge for machining is produced by the second high-current discharge circuit.
Claims4
An electric-discharge machining power source for using an electrode to machine a workpiece comprising:
- a first low-current discharge circuit means for making the electrode positive and the workpiece negative to produce a reverse discharge;
- means for detecting the potential between the electrode and the workpiece to determine when the reverse discharge occurs;
- and a second high-current discharge circuit means, responsive to the means for detecting the potential, for making the electrode negative and the workpiece positive to produce a main machining discharge upon detection of the reverse discharge.
Dependencies are inferred from the claim text.