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:
Jan. 10, 2012
Filed:
Oct. 24, 2006
Takashi Hashimoto, Chiyoda-ku, JP;
Yasuo Onodera, Chiyoda-ku, JP;
Tatsushi Sato, Chiyoda-ku, JP;
Koichiro Hattori, Chiyoda-ku, JP;
Hisashi Yamada, Chiyoda-ku, JP;
Takashi Hashimoto, Chiyoda-ku, JP;
Yasuo Onodera, Chiyoda-ku, JP;
Tatsushi Sato, Chiyoda-ku, JP;
Koichiro Hattori, Chiyoda-ku, JP;
Hisashi Yamada, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A wire electric discharge machine includes a wire electrode; a machining power supply that supplies a machining current to between the wire electrode and a workpiece. The machine further includes a first power feed contact and a second power feed contact that respectively feed power to the wire electrode; a first machining-current loop in which a first machining current flows from the first power feed contact toward the workpiece; a second machining-current loop in which a second machining current flow from the second power feed contact toward the workpiece; an impedance switching circuit that is provided in at least any one of the first machining-current loop and the second machining-current loop; and a control unit that controls a flow ratio of the first machining current and the second machining current by changing an impedance of the impedance switching circuit.