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:
May. 27, 2025
Filed:
Jan. 09, 2020
Nippon Steel Corporation, Tokyo, JP;
Takashi Yasutomi, Tokyo, JP;
Akinobu Kobayashi, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
There is provided a cutting method for cutting a workpiece using a cutting tool comprising a die and a punch, including: arranging the workpiece between the die and the punch, and in a state in which a wedge-shaped first cutting part of the die and a wedge-shaped second cutting part of the punch are opposed, pushing the punch relatively to the die side to cut the workpiece; wherein: a front end angle θof the first cutting part and a front end angle θof the second cutting part are each 10° or more and 120° or less, and a front end radius Rof the first cutting part and a front end radius Rof the second cutting part are each 0.5% or more and 35.0% or less of a sheet thickness.