Modified superhard cutting elements having reduced surface roughness method of modifying, drill bits equipped with such cutting elements, and methods of drilling therewith
US5653300A · kind A · utility
250Cited by
43References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Aug 5, 1997 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T407/27
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A superhard cutting element having a polished, low friction substantially planar cutting face with a surface finish roughness of 10.mu. in. or less and preferably 0.5 .mu. in. or less. A chamfered cutting edge and side surface of the superhard material table of the same surface finish roughness are also disclosed. The surface roughness of the aforementioned superhard material table portions may be reduced by mechanically smoothing and polishing according to one of several variations of the method of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.