Apparatus for forming microscopic recesses on a cylindrical bore surface and method of forming the microscopic recesses on the cylindrical bore surface by using the apparatus
US8641335B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2006 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Dec 7, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/854
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An apparatus for forming recesses on a circumferential surface that defines a cylindrical bore in a workpiece includes a tool holder disposed coaxially with the cylindrical bore; a form roller support retained on the tool holder; a form roller rotatably supported on the form roller support, the form roller including projections on an outer circumferential surface thereof which are configured to form the recesses on the circumferential surface that defines the cylindrical bore in the workpiece. A control assembly is configured to control the form roller support such that the form roller is allowed to be in press contact with the circumferential surface that defines the cylindrical bore in the workpiece at a press contact load of a predetermined value on the basis of a centrifugal force which is exerted on the form roller support and the form roller during rotation of the tool holder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.