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:
Oct. 13, 2020
Filed:
Aug. 19, 2016
Mitsubishi Hitachi Tool Engineering, Ltd., Tokyo, JP;
Yasuhiro Kiuchi, Narita, JP;
Yoshiyuki Kobayashi, Narita, JP;
Takao Nakamigawa, Narita, JP;
Fumihiko Inagaki, Narita, JP;
Yuuki Hayashi, Narita, JP;
Mitsubishi Hitachi Tool Engineering, Ltd., Tokyo, JP;
Abstract
In an indexable rotary cutting tool of the present invention, a cutting edge portion of an insert includes a peripheral cutting edge, a bottom cutting edge, a cutting edge of a corner R, and a chamfered surface, a radial rake angle (δ) of the cutting edge of the corner R has a negative value in an entire edge length region of the cutting edge of the corner R, and the radial rake angle (δ) becomes a minimum value at an intermediate portion located between a pair of boundary points (P, Q) in the cutting edge of the corner R.