Surface densification of powder metal bearing caps
US7168858B2 · kind B2 · utility
5Cited by
7References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 2002 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Oct 17, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/479
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high performance main bearing cap has particular surfaces densified for improved fatigue crack resistance. The surfaces densified are the bolted face (F) inside of a perimetral margin and outside of bold head interface areas around the main bolt holes (B), the surfaces of the main bolt holes and the side bolt hole threads (S). Preferred methods of densification are single needle programmable pattern peening of the bolted face peened area, over-burnishing of the bolt holes, and forming the threads rather than cutting them for the side bolt threads.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.