Method of hot stamping and hardening a metal sheet
US7678208B2 · kind B2 · utility
23Cited by
4References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 4, 2005 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Nov 24, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2221/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In the press hardening process when a blank is formed and cooled in cooled tools (30,31), the tools are used as a fixture during the hardening. The tools have alternately contact surfaces (33,34) and clearances (35) in a certain area against the formed product (20-24) and the contact surfaces have an area that is less than 20% of the area. As a result, this area will be a soft zone (11) of the final product and the zone will have good dimensional accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.