Forming apparatus and forming method using forming apparatus
US11833564B2 · kind B2 · utility
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6Claims
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Assignee
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Key dates
| Filing date | Aug 14, 2022 |
| Grant date | Dec 5, 2023 |
| Priority date | — |
| Expiry date | Aug 14, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D53/88
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An upper die of a forming apparatus includes a first curved portion and a second curved portion between a second concave section and an upper holding surface. The first curved portion is curved in a direction away from the upper die. The second curved portion is curved toward the upper die. A blank holding surface of a blank holder holds a blank between the blank holding surface and the upper holding surface of the upper die. The blank holding surface faces the second curved portion. The blank holding surface includes a blank curved surface recessed along the second curved portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.