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. 12, 2006
Filed:
Jul. 13, 2005
Yasuo Yamane, Hiroshima, JP;
Masahiko Fukuta, Numazu, JP;
Osamu Shirane, Mishima, JP;
Toshiba Kikai Kabushiki Kaisha, Tokyo, JP;
Abstract
According to a machining device for machining a conductive workpiece (W) by a conductive (T), when the tool (T) contacts the workpiece (W) in machining, there is formed a closed-circuit (C) connecting the tool (T), the workpiece (W), a brush (), a conductor (), a main spindle housing (), a main spindle () and again the tool (T in that order. Alternating-current is inducted to the closed-circuit (C) by a high-frequency generator () and an exciting coil (). As a contact state between the tool (T) and the workpiece (W), impedance of the closed-circuit (C) is changed and then the alternating-current is changed, so that induction current is generated at a detector coil (), thus monitoring and controlling the contact state by way of the induction current. Since a light contact state can constantly be maintained in machining according to a monitoring condition including a light/heavy contact-determining threshold, cutting resistance will not increase, thereby preventing damage on the tool (T) and deterioration in machining accuracy.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile