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. 16, 2005
Filed:
Jan. 23, 2001
Toshio Nakashima, Tokyo, JP;
Kouichirou Hattori, Tokyo, JP;
Yoshikazu Ukai, Tokyo, JP;
Atsushi Taneda, Tokyo, JP;
Akihiro Goto, Tokyo, JP;
Takashi Hashimoto, Tokyo, JP;
Toshio Nakashima, Tokyo, JP;
Kouichirou Hattori, Tokyo, JP;
Yoshikazu Ukai, Tokyo, JP;
Atsushi Taneda, Tokyo, JP;
Akihiro Goto, Tokyo, JP;
Takashi Hashimoto, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A power supply unit for wire electrical discharge machining using an ac high-frequency power supply for applying an ac high-frequency voltage between a wire electrode (1) and a workpiece () includes a high-frequency oscillation and amplification circuit () and a pulse power supply () which is an ac-high-frequency-voltage intermittently supplying unit for effecting the application of the ac high-frequency voltage between the electrode and the workpiece and a pause thereof. In wire electrical discharge machining using this power supply unit for wire electrical discharge machining, it is possible to suppress the vibration of the wire electrode (1) due tog the electrostatic force acting between the wire electrode (1) and the workpiece (), making it possible to improve the straightness accuracy of a machined surface of the workpiece () and make surface roughness small.