发明名称 |
DRILL BIT AND METHOD FOR MANUFACTURING |
摘要 |
A method for manufacturing a drill bit (1), wherein in a first step the chip flutes (12) are ground into a round rod, in a second step the round rod is ground down to its outer diameter (15, 16) with simultaneous grinding of the drill-bit back (13), and wherein in a third step the drill-bit front (4) is ground, and a drill bit (1) having at least one chip flute (12) and one secondary cutting edge and one drill-bit back (13) adjoining the secondary cutting edge, the drill-bit back (13) sloping downwards as the distance from the secondary cutting edge increases, in order to create a clearance that becomes continuously larger as the distance from the point of intersection (19) of the secondary cutting edge with the drill-bit back (13) increases. |
申请公布号 |
WO2011097109(A3) |
申请公布日期 |
2011.12.29 |
申请号 |
WO2011US22681 |
申请日期 |
2011.01.27 |
申请人 |
KENNAMETAL INC.;SCHWAEGERL, JUERGEN;SOLLFRANK, PETER |
发明人 |
SCHWAEGERL, JUERGEN;SOLLFRANK, PETER |
分类号 |
B23P15/32;B23B51/02;B23B51/06;B24B3/24 |
主分类号 |
B23P15/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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