Electric discharge machining method and device with preset electrode

USRE31494E · kind E · reissue

Assignee

• Ateliere des Charmilles, S.A. · CH

Inventors

• Francois Balleys · Geneva, CH
• Jean-Luc Dupraz · Bussigny, CH

Key dates

• Filing date: Jun 26, 1981
• Grant date: Jan 10, 1984
• Expiry date: Jun 26, 2001

Classification

• Technology area (CPC —): General

Abstract

In electrical discharge machining, an electrode is displaced towards a workpiece at a rate controlled as a function of the sparking conditions. The relative position of the electrode and workpiece is measured and, beyond a preset .[.reference.]. relative position, advance of the electrode is slowed as a function of the displacement past the reference position, or is stopped at the reference position, while continuing sparking and allowing withdrawal of the electrode if necessitated by the sparking conditions.