Apparatus for measuring the crushing strength of micron superabrasives
US7275446B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2004 |
| Grant date | Oct 2, 2007 |
| Priority date | — |
| Expiry date | Nov 26, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2203/0284
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus are provided for measuring the crushing strength of an abrasive, comprising particles, used in a lapping process. Embodiments include a crushing strength tester having a cup for holding the abrasive; a first motor for rotating the cup in a first direction; a piston having a face for rotatably fitting within the cup and contacting the abrasive; a second motor for rotating the piston in a second direction opposite the first direction; and a press for pressing the piston against the abrasive and crushing the particles while the first and second motors are rotating. An initial particle size distribution for the particles is determined, then the abrasive is subjected to a crushing force approximately equal to that of the lapping process using the crushing strength tester. A post-crushing particle size distribution for the particles is determined, and the initial and post-crushing particle size distributions are compared.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.