Method of forming coated steel sheet
US7596980B2 · kind B2 · utility
5Cited by
4References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2005 |
| Grant date | Oct 6, 2009 |
| Priority date | — |
| Expiry date | Dec 27, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D51/18
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for forming a container half (10) from a coated steel sheet (21) is provided. Because a first planar part (27) at an outer peripheral part of a first formed body (26) provided through a first drawing step is held by a blank holder (33) during its bending to provide an L-shaped cross-section part (36) in a second drawing step, no wrinkles will develop at a vertical part (38). Because an unnecessary outer part (44) of a flange part (46) is cut off in a trimming step, the width of the flange part is narrowed. By virtue of the narrowed width, no wrinkles will develop during bending of the flange part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.