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:
Apr. 14, 2025
Filed:
Jan. 20, 2020
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Jun Eto, Tokyo, JP;
Hirokazu Unno, Tokyo, JP;
MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo, JP;
Abstract
The purpose of the present invention is to perform machining on a double-curved surface to have good finished surface characteristics while achieving high speed feeding. An end mill () is provided with a bottom blade (A) formed in a curved convex and circular arc shape, and a radius blade (B) located at the edge and formed in a circular arc shape. The bottom blade (A) has a region where a blade part is not formed on the axis of the end mill (), and the end mill () is further provided with a center blade (C) in the region of the bottom blade (A). The center blade (C) is formed in a circular arc shape with a radius smaller than that of the circular arc part of the bottom blade (A).