Vehicle frame part in the shape of a hollow profile
US6299242A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 14, 2000 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Apr 14, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4994
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A vehicle frame part in the shape of a hollow profile is disclosed, with a hollow profile made of light metal being expanded by high internal pressure deformation. A sleeve made of a material with a greater ductility than the light metal, especially a steel material, is slid onto the hollow profile. The sleeve is located on the hollow profile in such fashion that a predetermined area of the hollow profile is covered that is to be deformed during subsequent expansion with a high degree of deformation that exceeds the expandability of the light metal. The hollow profile is expanded by expansion by high internal pressure within this predetermined area to a degree beyond the bursting limit, whereupon the sleeve alone is expanded, subjected directly to high internal pressure at the burst point in the final shaped hollow profile, until the final shape of the part is reached in the area that is covered by the sleeve that is held at both ends in a press fit against the hollow profile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.