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    TWIST DRILL WITH UNEQUAL FLUTE SPACING AND UNEQUAL RELIEF ANGLES
    1.
    发明申请
    TWIST DRILL WITH UNEQUAL FLUTE SPACING AND UNEQUAL RELIEF ANGLES 审中-公开

    公开(公告)号：US20180250755A1

    公开(公告)日：2018-09-06

    申请号：US15448427

    申请日：2017-03-02

    申请人： Kennametal Inc.

    发明人： Stephen Michael George

    IPC分类号： B23B51/02

    CPC分类号： B23B51/02 ,  B23B2251/04 ,  B23B2251/202 ,  B23B2251/282 ,  B23B2251/408 ,  Y10T408/9097

    摘要： A twist drill having a shaft with a longitudinal axis, wherein the cutting tool includes a plurality of flutes extending about the longitudinal shaft along a helix angle and a plurality of lands adjacent the flutes. Each land has a cutting edge adjacent a corresponding flute and a margin (i.e. relief surface). A cutting point is adjacent a forward end of the shaft. A first, second and third forward cutting surfaces are adjacent the first, second and third cutting edges, respectively, and extend proximate the cutting point axially rearward for a predetermined length about the longitudinal axis of the shaft. The cutting edges are unequally angularly spaced from each other, and each forward cutting surface has a primary relief angle that are unequal to each other.

    DRILL AND METHOD OF MANUFACTURING MACHINED PRODUCT USING THE SAME
    2.
    发明申请
    DRILL AND METHOD OF MANUFACTURING MACHINED PRODUCT USING THE SAME 有权

    公开(公告)号：US20180243840A1

    公开(公告)日：2018-08-30

    申请号：US15747776

    申请日：2016-07-28

    申请人： Kyocera Corporation

    发明人： Hiroshi OGAWA

    IPC分类号： B23B51/02

    CPC分类号： B23B51/02 ,  B23B2226/31 ,  B23B2251/08 ,  B23B2251/122 ,  B23B2251/40 ,  Y10T408/9097

    摘要： In an embodiment, a drill includes a bar-shaped body rotatable around a central axis. The body includes a first surface located at a first end, a second surface intersecting with the first surface on a front side in a rotation direction, and a cutting edge located at an intersection of the first surface and the second surface. The second surface includes a first region located along the cutting edge, and a second region located on a front side in the rotation direction with respect to the first region. The second surface has a concave shape in a cross section orthogonal to the central axis.

    Drill
    3.
    发明授权
    Drill 有权

    公开(公告)号：US09901991B2

    公开(公告)日：2018-02-27

    申请号：US14913000

    申请日：2014-08-20

    申请人： MITSUBISHI MATERIALS CORPORATION

    发明人： Koichiro Naruke ,  Sohei Takahashi

    IPC分类号： B23B51/02

    CPC分类号： B23B51/02 ,  B23B2250/12 ,  B23B2251/406 ,  B23B2251/408 ,  Y10T408/9097

    摘要： Provided is a drill suitable for high-efficiency working. A cut debris discharge groove is formed in the outer periphery of the drill body front end section rotated about the axis, and a cutting edge is formed at the front end of the drill body. The wall surface of the cut debris discharge groove, which faces the rotational direction of the drill, is formed to have a concave curve line shape in a cross-section perpendicular to the axis, the concave curve line shape extending along a first circular arc.

    Drill
    8.
    发明授权
    Drill 有权
    钻头

    公开(公告)号：US09492877B2

    公开(公告)日：2016-11-15

    申请号：US14342029

    申请日：2011-09-06

    申请人： Kazuteru Takai ,  Kazutoyo Itoh ,  Hiroyuki Amano

    发明人： Kazuteru Takai ,  Kazutoyo Itoh ,  Hiroyuki Amano

    IPC分类号： B23B51/02 ,  B23B51/06

    CPC分类号： B23B51/02 ,  B23B51/06 ,  B23B2222/28 ,  B23B2251/04 ,  B23B2251/08 ,  B23B2251/12 ,  B23B2251/125 ,  B23B2251/14 ,  B23B2251/18 ,  B23B2251/241 ,  B23B2251/40 ,  Y10T408/909 ,  Y10T408/9095 ,  Y10T408/9097

    摘要： A drill includes: a chip discharge flute opened in a tip surface; and a cutting edge formed at an intersecting portion between an inner wall surface of the chip discharge flute on a side of a drill rotation direction and a tip flank formed on the tip surface, the cutting edge being made up of a concavely-curved cutting edge portion formed on an inner circumferential side and a convexly-curved cutting edge portion formed on an outer circumferential side, a cross section orthogonal to an axial center having a first convex curve corresponding to the convexly-curved cutting edge portion and a first concave curve corresponding to the concavely-curved cutting edge portion intersecting with each other.

    摘要翻译： 钻头包括：在尖端表面开口的排屑槽; 以及切削刃，其形成在所述切屑排出槽的内壁面与钻头旋转方向一侧的交叉部分与形成在所述刀片面上的前端面之间，所述切削刃由凹曲面切削刃 形成在内周侧上的部分和形成在外周侧的凸曲面切割边缘部分，与具有对应于凸曲面切割边缘部分的第一凸曲线的轴向中心正交的横截面和对应于第一凹曲线的第一凹曲线 到相互交叉的凹曲面切削刃部。

    Drill body of indexable drill
    9.
    发明授权
    Drill body of indexable drill 有权
    钻机可转位钻

    公开(公告)号：US09446457B2

    公开(公告)日：2016-09-20

    申请号：US14344449

    申请日：2011-09-16

    申请人： Takuma Aoyama

    发明人： Takuma Aoyama

    IPC分类号： B23B51/04 ,  B23P15/32

    CPC分类号： B23B51/048 ,  B23B51/0493 ,  B23B2251/14 ,  B23B2251/402 ,  B23B2251/404 ,  B23B2251/408 ,  B23B2251/422 ,  B23P15/32 ,  Y10T408/9097

    摘要： A drill main body of an indexable drill is disposed first and second spiral flutes on a column-shaped outer circumferential surface with an inner blade tip cutting a hole center side mounted on a tip portion of the first spiral flute and an outer blade tip cutting a hole outer circumferential side mounted on a tip portion of the second spiral flute and the drill main body discharges chips through the first spiral flute and the second spiral flute toward a shank while hole machining is performed with the inner blade tip and the outer blade tip. The drill is a deep hole machining drill having a length of the first spiral flute and the second spiral flute equal to or greater than 4D relative to a drill diameter D that is an outer diameter of the outer blade tip.

    摘要翻译： 可转位钻头的钻头主体在柱状的外圆周表面上设置有第一和第二螺旋形槽纹，内刀片尖端切割安装在第一螺旋形槽纹的顶端部分上的孔中心侧，外刀片尖端切割 安装在第二螺旋槽的末端部分上的孔外圆周侧和钻头主体通过第一螺旋槽和第二螺旋槽朝向柄排出碎屑，同时利用内刀尖和外刀尖进行孔加工。 钻头是深孔加工钻头，其相对于作为外刀片末端的外径的钻头直径D具有第一螺旋槽和第二螺旋槽的长度等于或大于4D。

    DRILL BIT
    10.
    发明申请
    DRILL BIT 有权
    钻头

    公开(公告)号：US20160214184A1

    公开(公告)日：2016-07-28

    申请号：US14915314

    申请日：2014-08-25

    申请人： MAPAL FABRIK FÜR PRÄZISIONSWERKZEUGE DR. KRESS KG

    发明人： Ulrich KRENZER ,  Serkan TOPAL

    IPC分类号： B23B51/02

    CPC分类号： B23B51/02 ,  B23B2250/12 ,  B23B2251/04 ,  B23B2251/14 ,  B23B2251/18 ,  Y10T408/909 ,  Y10T408/9097

    摘要： A drill has a central axis, a front side, a circumferential surface, at least two main edges on the front side, which reach up to the circumferential surface and merge there with secondary edges, at least two central edges extending from the end of the main edge facing away from the circumferential surface, cutting surfaces associated with the main edges and central edges, chip flutes associated with the main edges and central edges and introduced into the circumferential surface, at least one cross edge adjoined by the ends of the central edges facing away from the main edges which passes through the central axis, a point thinning and chip run-up shoulders associated with at least the cutting surfaces of the central edges. An angle γ of the chip run-up shoulder decreases in the region of the point thinning towards the central axis as the distance from the front side increases.

    摘要翻译： 钻头具有中心轴线，前侧面，圆周表面，前侧至少两个主边缘，其至少延伸到圆周表面并与其二次边缘合并在一起，至少两个中心边缘从 主边缘远离圆周表面，与主边缘和中心边缘相关联的切割表面，与主边缘和中心边缘相关联的芯片凹槽并被引入圆周表面，至少一个与中心边缘的端部邻接的十字边缘 面向远离穿过中心轴线的主边缘，与中心边缘的至少切割表面相关联的点变薄和芯片起落肩部。 随着距离前侧的距离增加，芯片上升台肩的角度γ在朝向中心轴线变薄的点的区域中减小。