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. 05, 2020
Filed:
Feb. 08, 2017
Nippon Steel and Sumitomo Metal Corporation, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
Provided is a shearing method which can produce a worked material having a sheared edge excellent in surface perpendicularity and surface properties with a good productivity while suppressing tool wear and damage. The method comprises a first shearing step of placing a first blank having first and second surfaces on a first die so that said second surface is arranged on said first die side, and shearing said first blank from said first surface toward said second surface in a sheet thickness direction of said first blank by a first punch arranged at said first surface side to obtain a first punched out material and first worked material; and a second shearing step of placing a second blank and (x) using said first punched out material as a second punch, (y) using said first worked material as a second die, or both thereof.