Method of making a blank of a drill bit
US4694710A · kind A · utility
5Cited by
1References
6Claims
0Family size
Inventor
Key dates
| Filing date | Jun 2, 1986 |
| Grant date | Sep 22, 1987 |
| Priority date | — |
| Expiry date | Jun 2, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23P15/32
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A plurality of blanks for drill bits are produced from a disc-shaped composite abrasive compact by first producing a plurality of sticks of polygonal shape end-on and thereafter longitudinally rounding each stick. The rounded drill blank is then fluted to produce a small diameter twist drill bit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.