BOHRER UND HERSTELLUNGSVERFAHREN FÜR EINEN BOHRER
    2.
    发明公开
    BOHRER UND HERSTELLUNGSVERFAHREN FÜR EINEN BOHRER 有权
    BOHRER UND HERSTELLUNGSVERFAHRENFÜREINEN BOHRER

    公开(公告)号:EP2771143A1

    公开(公告)日:2014-09-03

    申请号:EP12737786.9

    申请日:2012-07-18

    摘要: The invention relates to a drill (1) having a shaft (4) along an axis (2) between a drill head (3) and an insertion end (5). The shaft (4) is provided with at least two first grooves (34) extending along the axis (2) and at least one second helical groove (31). The first grooves (34) and the second groove (31) cross one another at several intersections (41). A groove width (35) of the first groove (34) continuously decreases in the course between two adjacent intersections (41) from one of the intersections (41) to a narrowest point (42). After the narrowest point (42), the groove width (35) continuously increases to the other of the intersections (41).

    摘要翻译: 钻头在沿着轴线(2)的钻头(3)和可插入端(5)之间具有柄(4)。 杆(4)设置有沿轴线(2)和至少第二螺旋槽(31)延伸的至少两个第一凹槽(34)。 第一凹槽(34)和第二凹槽(31)在几个交叉点(41)处彼此交叉。第一凹槽34的宽度(35)从两个交叉点之一的两个相邻交叉点(41)之间的区域稳定地减小 (41)一直到最狭窄的地方(42),随后一直稳步增加到另一个过境点(41)。