Patent Number: 6,252,191

Title: Method and apparatus for electrical discharge machining with intermittent electrical measuring

Abstract: 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 electrode during fine machining. To achieve shorter processing times, higher precision and better reproducibility, the method and apparatus determine with an electrical measurement the amount that an electrode is in contact with a workpiece during a measurement time that erosion has been interrupted. A pulse duty factor is then obtained from the contact amount to control further processing via, for example, the duration of the erosion pulses.

Inventors: D'Amario; Rino (Taverne, CH)

Assignee: Agie SA

International Classification: B23H 7/04 (20060101); B23H 7/06 (20060101); B23H 003/02 (); B23H 007/04 (); B23H 007/20 ()

Expiration Date: 06/26/2018