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:
Sep. 27, 2016
Filed:
Dec. 26, 2013
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;
Abstract
A press forming apparatus () consecutively carries out: a first step of pushing a flat plate-shaped workpiece into a die () by a forming punch (), to form the workpiece into a cup-shaped workpiece (B); a second step of making the cup-shaped workpiece (B) move relatively to a position where a space (S) is formed between a cup bottom part (B) and the forming punch () by a holding down member () abutting on an end part of a cup vertical wall part (B); and a third step of making a counter punch () approach the forming punch (), to push a cup bottom part (B) to a forming punch () side so that the cup bottom part (B) is compressed by the forming punch () and the counter punch (), making a material of the cup vertical wall part (B) flow to a cup shoulder part (B), thereby to thicken the cup shoulder part (B).