Machine part with improved surface texture for rolling contact and/or sliding contact
US5643054A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1996 |
| Grant date | Jul 1, 1997 |
| Priority date | — |
| Expiry date | Mar 4, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2360/18
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A machine part includes a surface suitable for rolling contact and/or sliding contact on another machine pad and made by an at least two-stage honing process, with a first honing step effecting a surface texture exhibiting a plurality of peaks and a plurality of pits and defining a mean profile line, and a second honing step for removal of the peaks to a level of the mean profile line for forming a plateau-like tenure that is interrupted by crossing pits, whereby the depth of the pits from the first honing step is maintained. Subsequently, abrasive grain is pushed into the surface for creating a crater-like recess, thereby displacing material at random in horizontal and venial directions for at least partially closing the pits. Mounds created during material displacement and positioned above the mean profile line are removed through a subsequent polishing process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.