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. 04, 2012
Filed:
Oct. 24, 2006
Yasuo Onodera, Chiyoda-ku, JP;
Tatsushi Sato, Chiyoda-ku, JP;
Takashi Hashimoto, Chiyoda-ku, JP;
Hisashi Yamada, Chiyoda-ku, JP;
Koichiro Hattori, Chiyoda-ku, JP;
Yoshikazu Ukai, Chiyoda-ku, JP;
Yasuo Onodera, Chiyoda-ku, JP;
Tatsushi Sato, Chiyoda-ku, JP;
Takashi Hashimoto, Chiyoda-ku, JP;
Hisashi Yamada, Chiyoda-ku, JP;
Koichiro Hattori, Chiyoda-ku, JP;
Yoshikazu Ukai, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A wire electrical discharge machining apparatus includes a unit capable of separately opening and closing each of a high impedance path and a low impedance path, a unit that sets an open/close pattern in which a combination of closing one of the feeding paths and opening another one of the feeding paths is designated for switching power feeding between the high impedance path and the low impedance path, a unit that changes pulse energy per feeding pulse in a present feeding path to reduce a difference in discharge pulse energy applied to an inter-electrode gap from a machining power supply between at a time of high-impedance-path feeding and at a time of low-impedance-path feeding, and a unit that controls opening and closing of the path open/close unit in accordance with the changed open/close pattern.