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:
Jun. 13, 2017
Filed:
Jul. 31, 2012
Kyoichi Hamada, Aiko-gun, JP;
Nobuaki Igi, Aiko-gun, JP;
Kyoichi Hamada, Aiko-gun, JP;
Nobuaki Igi, Aiko-gun, JP;
MAKINO MILLING MACHINE CO., LTD., Tokyo, JP;
Abstract
An electrical discharge machining method includes a step in which a pipe electrode is arranged such that the axis line of the pipe electrode faces the depth direction of the throughholes, the pipe electrode is moved relative to the workpiece, and a sloped section is formed; a step in which a straight section connected to the sloped section is formed; and a step in which the pipe electrode is arranged such that the axis line is vertical relative to the inside wall surface of the sloped section, the pipe electrode is moved relative to the workpiece, and the inside wall surface is machined.