Hydroforming of porthole extrusion with non-equiangular seams
US11052445B2 · kind B2 · utility
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6References
8Claims
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Key dates
| Filing date | Jan 31, 2018 |
| Grant date | Jul 6, 2021 |
| Priority date | — |
| Expiry date | Jan 19, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D53/88
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of forming a part includes extruding a billet through a die, forming a round, closed geometry tube from the billet, and hydroforming the round, closed geometry tube. The extrusion die contains an orifice with a central mandrel, a plurality of bridges, and a corresponding plurality of portholes between the bridges. A spacing of the bridges around the mandrel is non-equiangular. As a result, the round, closed geometry tube has non-equiangular welds after emerging from the die.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.