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:
Nov. 20, 2001
Filed:
Jul. 12, 1999
Masayuki Hironaga, Nagoya, JP;
NGK Insulators, Ltd., , JP;
Abstract
Disclosed is a wire electric discharge machining apparatus comprising a wire-driving system for feeding a wire electrode while opposing it to a workpiece, and a power supply unit for supplying electric power to the wire electrode, wherein electric discharge is effected between the wire electrode and the workpiece to machine the workpiece to have an arbitrary shape. The wire electrode is allowed to approach the workpiece to effect the electric discharge between the wire electrode and the workpiece so that the workpiece is machined to have an arbitrary shape, while a suction mechanism is used to remove undesirable matters including sludge together with a working fluid via cylindrical members from holes formed in the workpiece. Accordingly, it is possible to easily form, by means of wire electric discharge machining, a machining groove having a narrow width and a large depth under a condition deviated from the general standard machining condition for the wire electric discharge machining, for example, even for a workpiece having a large thickness.