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:
Jun. 07, 2011
Filed:
Jun. 28, 2006
Toshiyuki Niwa, Chiba, JP;
Hiroshi Yoshida, Chiba, JP;
Eiji Isogai, Chiba, JP;
Yuichi Yoshida, Chiba, JP;
Toshiyuki Niwa, Chiba, JP;
Hiroshi Yoshida, Chiba, JP;
Eiji Isogai, Chiba, JP;
Yuichi Yoshida, Chiba, JP;
Nippon Steel Corporation, Tokyo, JP;
Arcelor France, St. Denis, FR;
Abstract
A computer performs press forming analysis based on a shape of a formed product or of a member, a blank holder force, a friction coefficient, a tensile strength of a material, a yield strength, a stress-strain relation, and a sheet thickness, as press forming conditions, to calculate sheet thickness distribution and post-formation strain distribution of the formed product. The computer also performs performance analysis based on the sheet thickness distribution, the post-formation strain distribution, and the shape of the formed product or of the member, as state amounts of the formed product. This calculate performance of the member. The computer repeats the calculations performed in the process from the first step through the second step a predetermined number of times, with at least one of the press forming conditions being changed, to output an optimum press forming condition that gives a maximum value or a target value of the performance