The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 2009
Filed:
Apr. 30, 2004
Fabrice Jaques, Meyrin, CH;
Sebastian Dorthe, St. Ursen, CH;
Maurizio Tognolini, Bassins, CH;
Guy Demule, Cornier, FR;
Ernesto Bühler, Losone, CH;
Fabrice Jaques, Meyrin, CH;
Sebastian Dorthe, St. Ursen, CH;
Maurizio Tognolini, Bassins, CH;
Guy Demule, Cornier, FR;
Ernesto Bühler, Losone, CH;
Charmilles Technologies S.A., Meyrin, CH;
Abstract
The electrical discharge machining device comprises a first voltage/current source (U) for discharge initiation connected to the tool electrode (F) and a workpiece electrode (P) forming the poles of a machining gap (G) and a second voltage/current source (U) that can be disconnected by way of two switches (SW, SW). Capacitive elements (C, C) are mounted in series in the lines () connecting the first source to the poles of the machining gap (G). In addition, these poles can be connected by a self-induction coil (Lm) mounted in series with an adjustable DC source (Sm). Thanks to these features, the energy of the eroding discharges can be significantly reduced in order to obtain a superfine surface finishing process of high quality, while at the same time precisely controlling the mean voltage across the terminals of the machining gap.