Method for predicting an amount of dimensional accuracy defect at the time of press-forming metal sheet
US6915244B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2000 |
| Grant date | Jul 5, 2005 |
| Priority date | — |
| Expiry date | Jul 29, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D5/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method in which engineers having no experience and technical storage can preliminarily easily and accurately predict an amount of dimensional accuracy defect which occurs at the time of press-forming a metal sheet before press-forming without having expertise such numerical value simulations and mathematics. In predicting an amount of dimensional accuracy defect at the time of press-forming a metal sheet, as a stress-strain relationship, an elastic-perfectly plastic solid model having a fixed stress value after being yielded is adopted and a value which is equal to or less than a tensile strength and exceeds a yield strength is used as an apparent yield strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.