Torsion beam manufacturing method and torsion beam
US8505941B2 · kind B2 · utility
4Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2010 |
| Grant date | Aug 13, 2013 |
| Priority date | — |
| Expiry date | Mar 31, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49622
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method enhances fatigue strength of ear portions which are high fatigue risk parts in a torsion beam almost without bringing about disadvantages in terms of productivity and cost. A torsion beam is formed with a portion of the tubular body into an approximately U-shape in cross section by crushing the portion of the tubular body in the radial direction and, thereafter, due to bending with a bottom line set as a belly side of bending, a bending strain of 2 to 6% in the tube longitudinal direction on a tensile side is imparted to the ear portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.