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:
Sep. 07, 1993
Filed:
May. 06, 1991
Takahisa Masuzawa, Kamakura, JP;
Yoshida Kogyo K.K., Tokyo, JP;
Abstract
The invention relates to a method of electrolytically machining the surface of a workpiece by applying positive and negative electric current pulses alternately and repeatedly across the workpiece and a tooling electrode located oppositely in a neutral electrolyte so as to keep a predetermined gap therebetween, wherein the time interval from a negative pulse to a positive pulse is shorter than that from the positive pulse to the next positive pulse. The invention also relates to an apparatus for attaining the method comprising: a device for supporting the workpiece in an electrolytic machining tank; a device for supporting an electrode opposite to the workpiece so as to keep the gap; a power supply means for repeatedly applying across the workpiece and the electrode an electric current waveform wherein its polarity changes alternately and the time interval from a negative pulse to a positive pulse is shorter than that from the positive pulse to the next negative pulse; a device for supplying an electrolyte between the workpiece and the electrode; and a control system for controlling the workpiece fixing device, the electrode supporting device, the power supply means and the electrolyte supplying device.