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    Drill bit
    3.
    发明专利
    Drill bit 有权

    公开(公告)号：JP2004500994A

    公开(公告)日：2004-01-15

    申请号：JP2001587959

    申请日：2001-05-23

    申请人： サンドビック アクティエボラーグSandvik Actiebolag

    发明人： ニゴールド，エーロ

    IPC分类号： B23B51/00 ,  B23B51/02

    CPC分类号： B23B51/02 ,  B23B2251/14 ,  Y10T408/899 ,  Y10T408/9065 ,  Y10T408/9097

    摘要： A drill bit for the working of metal has a center pilot tip that transforms into straight cutting edges extending towards the outer periphery of the bit. Each cutting edge forms a cutting angle of 1-20° with a reference plane oriented perpendicular to of the drill axis. Each a cutting edge is inclined in a radially inward and axially rearward direction toward the drill axis. The center tip forms a pilot point angle of 90±2° and a has base that takes up 23-45 percent of the total diameter of the cutting section of the drill bit. The tip has a tip angle of 90±10°.

    Throw-away drill and tip arrangement method for the drill
    8.
    发明专利
    Throw-away drill and tip arrangement method for the drill 有权
    钻孔钻头和钻头安装方法

    公开(公告)号：JP2008178967A

    公开(公告)日：2008-08-07

    申请号：JP2007098150

    申请日：2007-04-04

    申请人： Sumitomo Electric Hardmetal Corp ,  住友電工ハードメタル株式会社

    发明人： NASU KAZUCHIKA ,  MAEDA ATSUHIKO

    IPC分类号： B23B51/00

    CPC分类号： B23B51/048 ,  B23B2200/201 ,  B23B2251/14 ,  B23B2251/18 ,  Y10T408/03 ,  Y10T408/87 ,  Y10T408/899 ,  Y10T408/905 ,  Y10T408/906 ,  Y10T408/9097

    摘要： PROBLEM TO BE SOLVED: To improve accuracy of an inlet hole diameter and an exit hole diameter, to exhibit stable performance and to suppress occurrence of burrs at the hole exit in a throw-away drill having cutting edges constructed from a plurality of throw-away tips. SOLUTION: Throw-away tips 5 -1 , 5 -2 constituting a center edge 8 and an outer circumference edge 9 are mounted on a tip end of a drill body 1. Proportions between the cutting amount A of the center edge 8 and the cutting amount B of the circumferential edge 9 are set such that the center edge 8 has a greater proportion, and the throw-away tip 5 -2 is projected axially forward from the throw-away tip 5 -1 so that biting in to a workpiece starts at an outer end corner 9a of the outer circumferential edge 9. COPYRIGHT: (C)2008,JPO&INPIT

    摘要翻译： 要解决的问题：为了提高入口孔直径和出口孔直径的精度，以表现出稳定的性能并且在具有由多个切口构成的切削刃的抛弃钻头中的孔出口处抑制毛刺的发生 扔掉提示。

    解决方案：构成中心边缘8和外周边缘9的抛出尖端5 -1 ，5 -2 安装在钻头的尖端 中心边缘8的切割量A与周向边缘9的切割量B之间的比例被设定为使得中心边缘8具有较大的比例，并且抛出尖端5 < / SB>从抛出尖端5 SB> -1轴向向前突出，从而咬入工件将从外圆周边缘9的外端角9a开始。版权所有（（ C）2008，JPO＆INPIT

    Twist drill and laminate material boring method
    9.
    发明专利
    Twist drill and laminate material boring method 有权
    TWIST钻孔和层压材料镗孔方法

    公开(公告)号：JP2013099851A

    公开(公告)日：2013-05-23

    申请号：JP2013044218

    申请日：2013-03-06

    申请人： Dormer Tools Ltd ,  ドーマー ツールズ リミテッドDormer Tools Limited

    发明人： GOULBOURNE DAVID

    IPC分类号： B23B51/00 ,  B23B51/02 ,  B23P15/32

    CPC分类号： B23B51/02 ,  B23B2226/27 ,  B23B2250/12 ,  B23B2251/04 ,  B23B2251/14 ,  B23B2251/18 ,  Y10T408/78 ,  Y10T408/81 ,  Y10T408/899 ,  Y10T408/906 ,  Y10T408/9097

    摘要： PROBLEM TO BE SOLVED: To provide a twist drill that can suppress formation of exit burrs and burr caps while maintaining drill performance.SOLUTION: A metal-working twist drill includes inner cutting edges forming a point (18) having an angle A of 130°. The outer peripheral parts of cutting edges (55 and 57) form outer cutting parts (59 and 61). The outer cutting part is inclined in a direction opposite to a corresponding inner cutting edge, and forms an angle B of 3° with respect to a plane perpendicular to the axis of rotation of the twist drill. The width D of the cutting edge of the outer cutting part is 10.5% of the diameter of the twist drill. The metal-working twist drill can bore a hole having a reduced burr height.

    摘要翻译： 要解决的问题：提供一种能够在保持钻头性能的同时抑制出口毛刺和毛刺帽的形成的麻花钻。 解决方案：金属加工麻花钻包括形成角度为130°的点（18）的内切割刃。 切削刃（55,57）的外周部形成外切削部（59,61）。 外切割部分沿与相应的内切割刃相反的方向倾斜，并且相对于垂直于麻花钻旋转轴线的平面形成3°的角度B。 外切割部的切削刃的宽度D为麻花钻直径的10.5％。 金属加工麻花钻可以钻一个具有减小的毛刺高度的孔。 版权所有（C）2013，JPO＆INPIT