Procédé de conception de moule, moule, procédé de production d'un panneau creux, et panneau creux
| N° de brevet: |
EP1884297 (A1) |
| Date de publication: |
2008-02-06 |
| Inventeur(s): |
SAKAE AKIRA [JP]; |
| Demandeur(s): |
KOBE STEEL LTD [JP]; |
| Classification: |
B21C25/00; |
| N° de demande: |
EP20070011703 20070614 |
| Numéro(s) de priorité: |
JP20060211962 20060803 |
A thin, wide hollow panel in good shape (1) is provided by extrusion through a die (24) designed for each of the entry ports (30a) and the merging space (31a) to have characteristic design values such that the hollow panel (1) has a relative error ( µ) within ±10% between the average value of strain (µi) in all regions (1b) in the welded parts (1a) and the individual values of strain (µi) in each region (1b) in the welded parts (1b).
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