System for magnetorheological finishing of substrates
US8613640B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2010 |
| Grant date | Dec 24, 2013 |
| Priority date | — |
| Expiry date | Mar 1, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B1/005
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A system for magnetorheological finishing of a substrate. An integrated fluid management module (IFMM) provides dynamic control of the rheological fluid properties of the MR fluid on a conventional MR finishing apparatus, and dispensing of the fluid to the wheel. A magnetically shielded chamber charged with MR fluid is in contact with the carrier wheel. A transverse line removes the spent MR fluid from the wheel as the ribbon leaves the work zone. Replenishment fluid is added to the chamber via a dripper, and preferably an electric mixer agitates MR fluid in the chamber. A grooved magnetically-shielded insert at the exit of the chamber forms a polishing ribbon on the carrier wheel as the wheel is turned. A sensor sensitive to concentration of magnetic particles provides a signal for control of MR fluid properties, particularly, water content in the MR fluid. Means is provided for cooling fluid within the chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.