| 发明名称 |
METHOD OF MAKING TOOL INSERTS, WIRE-DRAWING DIE BLANK AND DRILL BIT COMPRISING SUCH INSERTS |
| 摘要 |
A drill bit (28) incorporates a plurality of inserts (26) of abrasive compact, said inserts being of truncated pyramidal, truncated conical, or triangular shape, and tapering from a base (16) to a cutting edge or surface (18), and said inserts (26) being mounted in corresponding cavities in said drill bit (28) to expose each cutting edge or surface (18). |
| 申请公布号 |
DE2966640(D1) |
申请公布日期 |
1984.03.15 |
| 申请号 |
DE19792966640 |
申请日期 |
1979.08.13 |
| 申请人 |
DE BEERS INDUSTRIAL DIAMOND DIVISION (PROPRIETARY) LIMITED |
发明人 |
CAMPBELL, NICOLL ARCHIBALD DRUMMOND;DYER, HENRY BROOKE;DIETRICH, RAINER;PHAAL, CORNELIUS;REID, DOUGLAS JAMES |
| 分类号 |
E21B10/46;B21C3/02;B21C3/18;B23P15/30;E21B10/56;E21B10/567;(IPC1-7):B23P15/28;B24D3/00 |
主分类号 |
E21B10/46 |
| 代理机构 |
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代理人 |
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| 主权项 |
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