EDM process for manufacturing reverse tapered holes

A electrical discharge machining apparatus is disclosed. The apparatus may have an electrode, an actuator configured to advance the electrode, and a power supply. The apparatus may also have a controller in communication with the actuator and the power supply. The controller may be configured to neg...

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Bibliographische Detailangaben
Hauptverfasser:	GRANT MARION BILLINGSLEY, KAO CHENUN
Format:	Patent
Sprache:	eng
Schlagworte:	MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL TRANSPORTING WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OFELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKESTHE PLACE OF A TOOL
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Beschreibung
Zusammenfassung:	A electrical discharge machining apparatus is disclosed. The apparatus may have an electrode, an actuator configured to advance the electrode, and a power supply. The apparatus may also have a controller in communication with the actuator and the power supply. The controller may be configured to negatively charge the electrode, and regulate the actuator to advance the negatively charged electrode toward a positively charged workpiece, thereby initiating erosion of the positively charged workpiece. The controller may also be configured to positively charge the electrode and negatively charge the workpiece to erode the electrode to a desired condition after workpiece erosion has been initiated. The controller may also be configured to continue advancing the electrode toward the workpiece after the electrode has been eroded to the desired condition.