DRILLING TOOL HAVING POINT THINNING
    1.
    发明申请
    DRILLING TOOL HAVING POINT THINNING 审中-公开
    稀疏的钻井工具

    公开(公告)号:WO2009090042A3

    公开(公告)日:2009-10-15

    申请号:PCT/EP2009000170

    申请日:2009-01-14

    Abstract: The invention relates to a drilling tool (1), a) which can be rotated about a central tool axis (A), b) has at least two main cutters (10, 50) disposed on a front (1b) and transitioning into at least one cross-cutter (11, 51, 11', 51', 11'', 51'') in an inward direction toward the tool axis (A), c) wherein the cross-cutter (11, 51, 11', 51', 11'', 51'') extends in or across a central region (4) on the front (I a) surrounding the tool axis (A), d) wherein the cross-cutter (11, 51, 11', 51', 11'', 51'') forms a residual cross-cutter (11a) in the innermost region extending through the region of the tool axis or in the region thereof, and/or on the interior thereof, adjacent to a point thinning region (21, 61), e) wherein cutter corners (17, 57) are configured at the ends of the main cutters (10, 50) positioned on the outside, f) wherein a straight connecting line (2) is defined, which extends through two cutters corners (17, 57) of main cutters (10, 50) positioned opposite each other with regard to the tool axis (A), or which, in the absence of an opposite main cutter, extends through a cutter corner (17, 57) and the tool axis (A), g) wherein a cross-cutter interior region extends away from the outer end of the residual cross-cutter (11a', 51a'; 11a'', 51a'') within a region (D', D'') at an angle between -15° and +15° with regard to a parallel (m) to the connecting line (2), and particularly has a length of 1/100 to 1/10 of the drill diameter B, preferably up to the base side (F', F'') of the region (D', D'').

    Abstract translation: 本发明涉及一种钻孔工具(1),一个),其是围绕中心工具轴线(A)可旋转地,b)中的至少两个(在端面1b)设置在具有主切削刃(10,50)(在方向向内于工具轴线 一)在至少一个横向切割边缘(11,51,11 '51' ,11 '',51 '')通过,c)其中,所述凿锋(11,51,11',51' ,11 '',51 '' 通过)在一个或一个所述工具轴线(A)周围的中心区域(4)的前侧(I A)d),其中在横刃(11,51,11”,51' ,11 '',51 '') 形成穿过或在工具轴线(A)最里区域和/或一个Ausspitzungsbereich的内部(21,61),则残留的横向切削刃(11A)的区域中延伸,E),其中(在主切削的外端部边缘10,50)的切削刃(17 ,57)形成,F),其中,一个直的连接线(2)被定义,所述(两个切削角部17,57)相对于A)相对于谎言彼此(工具轴 方向主切削刃(10,50),或者,在不存在相对的主切削刃的,通过切割角部(17,57)和所述工具轴线(A)延伸,g)其中在一个交叉从残留横向切削刃(11A“ 51A”的外端内部区域; 在-15℃和+ 15°(之间的角度相对于一平行米运行11A“”,51A“”)的范围内(D“ D”)”的距离)的连接线(2)和处于特定的长度 1/100至钻头直径B的1/10,优选地至脚侧的区域的(F 'F' ')(D',D '')其中。

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