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:
Aug. 26, 2003
Filed:
Apr. 18, 2001
Osamu Yasuda, Nagoya, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A device for quality decision of a machining state of an electric spark machine to apply voltage in a pulse form to a machining space between an electrode and a workpiece for contour machining by pulse discharging includes a plurality of machining state detection apparatus each of which detects a different physical quantity that denotes a machining state. The physical quantity being machining speed, machining voltage, machining current, on and off times of voltage applied to an electrode, total number of discharges, number of abnormal discharges, abnormal discharging rate, and discharging frequency. Furthermore, a machining state evaluation and quality decision apparatus ( ) synthetically evaluates the machining state and quality decision of the machining state based on a combination of comparison of the physical quantities detected by the machining state detection apparatus with predetermined standard values for each of the physical quantities.