公开(公告)号：US20160129506A1

公开(公告)日：2016-05-12

申请号：US14536233

申请日：2014-11-07

申请人： DreBo Werkzeugfabrik GmbH

发明人： Martin Stumpp ,  Alexander Zurn ,  Peter Kehrle ,  Tobias Berg

IPC分类号： B23B51/02

CPC分类号： B23B51/02 ,  B23B2226/75 ,  B23B2251/046 ,  B23B2251/241 ,  B23B2251/245 ,  B23B2251/406 ,  B23B2251/44 ,  B23B2251/446 ,  Y10T408/9097

摘要： A drill with a drill flute (12) includes symmetrical fluted lands (20) helically extend around a core, wherein grooves (18) remain between the fluted lands, said grooves having a width (72) that exceeds the spine thickness or width (24) of the fluted lands (20), and wherein the grooves (18) comprise a convex core reinforcement (22) at the groove bottom thereof. The width (24) of the fluted lands (20) at the drill head side end (16) is smaller than at the shank side end (14) of the drill helix (12), and at least increases in certain areas. The core reinforcement (22) at the drill head side end (16) is more convex than at the shank side end (14), thus has larger radii (40, 42).

摘要翻译： 具有钻凿（12）的钻具包括对称的凹槽平台（20），围绕芯螺旋地延伸，其中凹槽（18）保留在凹槽区域之间，所述凹槽的宽度（72）超过脊柱厚度或宽度（24 ），并且其中所述凹槽（18）在其凹槽底部包括凸形芯加强件（22）。 在钻头侧端部（16）处的带槽纹的平台（20）的宽度（24）比在钻螺旋（12）的柄侧端部（14）处的宽度（24）小，并且在某些区域中至少增加。 在钻头侧端部（16）处的芯部加强件（22）比在柄侧端部（14）处更加凸出，因此具有较大的半径（40,42）。

公开(公告)号：US09718136B2

公开(公告)日：2017-08-01

申请号：US14536233

申请日：2014-11-07

申请人： DreBo Werkzeugfabrik GmbH

发明人： Martin Stumpp ,  Alexander Zurn ,  Peter Kehrle ,  Tobias Berg

IPC分类号： B23B51/02

CPC分类号： B23B51/02 ,  B23B2226/75 ,  B23B2251/046 ,  B23B2251/241 ,  B23B2251/245 ,  B23B2251/406 ,  B23B2251/44 ,  B23B2251/446 ,  Y10T408/9097

摘要： A drill with a drill flute (12) includes symmetrical fluted lands (20) helically extend around a core, wherein grooves (18) remain between the fluted lands, said grooves having a width (72) that exceeds the spine thickness or width (24) of the fluted lands (20), and wherein the grooves (18) comprise a convex core reinforcement (22) at the groove bottom thereof. The width (24) of the fluted lands (20) at the drill head side end (16) is smaller than at the shank side end (14) of the drill helix (12), and at least increases in certain areas. The core reinforcement (22) at the drill head side end (16) is more convex than at the shank side end (14), thus has larger radii (40, 42).