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:
Dec. 27, 2016
Filed:
Jul. 10, 2013
Applicant:
Nisshin Steel Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
Nisshin Steel Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21J 13/02 (2006.01); B21D 51/16 (2006.01); B21K 23/00 (2006.01); B21K 5/20 (2006.01); B21D 22/28 (2006.01); B21D 22/30 (2006.01);
U.S. Cl.
CPC ...
B21J 13/02 (2013.01); B21D 22/28 (2013.01); B21D 22/30 (2013.01); B21D 51/16 (2013.01); B21K 5/20 (2013.01); B21K 23/00 (2013.01);
Abstract
An ironing mold according to the present invention includes a punch that is inserted into a formed portion, and a die having a pushing hole into which the formed portion is pushed together with the punch. An inner peripheral surface extends non-parallel to an outer peripheral surface of the punch, and the inner peripheral surface is provided with a clearance that corresponds to an uneven plate thickness distribution, in the pushing direction, of the formed portion prior to the ironing relative to the outer peripheral surface to ensure that an amount of ironing applied to the formed portion remains constant in the pushing direction.