Drill bit with cemented carbide inserts
US4951762A · kind A · utility
136Cited by
7References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 28, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Jul 28, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K1/19
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A drill bit of the percussion type includes a bit body of steel, a front portion of which is provided with at least one slot in which an insert is attached by brazing. Brazed between the insert and side walls of the slot are side plates which are of uniform thickness while being thinner than the insert. The side plates are formed of cemented carbide or a metal alloy with a coefficient of linear expansion which for temperatures below 500.degree. C. is substantially smaller than that of steel and the braze metal while being approximately the same as that of the insert.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.