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:
Apr. 06, 1982
Filed:
Sep. 22, 1980
Michel P Mazond, Annemasse, FR;
Alain Wavre, Geneva, CH;
Ateliers des Charmilles, S.A., Geneva, CH;
Abstract
The present invention is a process and apparatus for machining an electrode workpiece by electrical discharges, wherein the electrode workpiece and an electrode tool are displaced relative to each other at least in one slant direction disposed at a predetermined angle with the principal axis of feed of one electrode relative to the other, the machining gap between the electrodes is set at a finite value such as to maintain predetermined machining conditions, consecutive machining passes are effected and, at the end of each machining pass, the slant direction of feed is displaced as soon as the amplitude of relative displacement between the electrodes reaches a predetermined limit value, and such limit value is changed from one pass to the next. For the purpose of removing material from the workpiece to an equal depth on all the surfaces of the workpiece in the course of a finish machining pass, the electrodes are displaced relative to each other in slanted directions which are modified as soon as the amplitude of displacement reaches a predetermined limit value whose envelope is a hemisphere. As a result of effecting such consecutive relative displacements of the electrodes in a specific predetermined sequence while maintaining the density of the machining current at an optimum value, the total duration of the finish machining operation is considerably reduced as compared to the prior art.