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    • 2. 发明申请
    • ROCK DRILL HAVING RELIEF GROOVES
    • WITH FREE针迹凿岩机
    • WO2012159947A3
    • 2013-04-11
    • PCT/EP2012059091
    • 2012-05-16
    • BOSCH GMBH ROBERTWIDMANN RAINER
    • WIDMANN RAINER
    • E21B10/58B23B51/02B28D1/14E21B10/44
    • E21B10/445B23B51/02B23B2222/28B23B2226/75B23B2251/04B23B2251/14B23B2251/18B23B2251/48B23B2251/50E21B10/58
    • The invention relates to a rock drill (20, 30) comprising a shank (23, 33), a drill head (21, 31) and a drill helix (22, 32), the rotational movement of which rock drill can be carried out during drilling about a drill axis (2). Said rock drill comprises at least one cutting body (1) on its front face pointing in the direction of advance (4), at least one cutting edge (5) on at least one front face of the cutting body, and a tool face (6) having a pertaining negative front face angle (alpha) and a flank (7) provided behind the front-face cutting edge in the direction of rotation (D) and having a pertaining flank angle (beta). The flank has a convex contour and the tool face angle (alpha) of the tool face is larger than the flank angle (beta1) adjacent to the cutting edge, said flank having a convex contour. In order to reduce the penetration resistance without losing plate stability, the flank has at least one relief groove (8, 9) which extends through the flank at least partially, in particular completely.
    • 公开了一种凿岩机(20,30)具有柄部(23,33),所述钻头(21,31)和钻头螺旋(22,32),由一个钻头轴钻探期间,其旋转运动(2)是可行的,(在其方向 具有4个)面向前侧上的至少一个切割体(1),与设置在所述切割元件的切削刃的端面的至少一个(5)和具有夹紧表面(6)具有相关联的负面角(阿尔法)和在旋转方向(D)的端部后面的切削刃位于 自由表面(7)与相关联的齿面角(测试版),其中,所述侧面具有凸出的弯曲轮廓,并且其中所述夹持表面的切削面角度(阿尔法)比相邻的侧面角(测试版1)至侧面凸出的弯曲轮廓的切割边缘越大。 为了减少耐贯通性,而不板稳定性的损失,具有自由表面的至少一个底切(8,9),其上的后刀面至少部分地,特别是完全,穿透。