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. 20, 2013
Filed:
Jul. 30, 2008
Tasuku Itoh, Toyokawa, JP;
Tasuku Itoh, Toyokawa, JP;
OSG Corporation, Toyokawa, JP;
Abstract
In cutting processes of a tree-shaped groove, in a rough cutting process, by using a rough cutting tool (), as well as cutting a tapered groove (), cutting is performed in a first narrow portion (), a second narrow portion (), and a third narrow portion () of a planned groove shapesuch that a specified cutting allowance is left. In the following semi-finishing process, by using a semi-finishing tool, cutting is performed for portions other than the three narrow portions (to) that have already been cut. Because a work materialdoes not come in contact with three reduced diameter portions, of the semi-finishing tool formed in an upside-down Christmas tree shape, corresponding to the three narrow portions (to), a load is not imposed on the three reduced diameter portions, which are weak against shock among all portions of the semi-finishing tool, and the cutting feed can therefore be faster. Further, by performing a finishing process, the tree-shaped groove can be efficiently cut.