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    CUTTING INSERT AND INDEXABLE EDGE ROTARY CUTTING TOOL
    11.
    发明申请
    CUTTING INSERT AND INDEXABLE EDGE ROTARY CUTTING TOOL 审中-公开

    公开(公告)号：US20190283149A1

    公开(公告)日：2019-09-19

    申请号：US16347340

    申请日：2017-12-11

    申请人： Mitsubishi Hitachi Tool Engineering, Ltd.

    发明人： Syoujirou Touma

    IPC分类号： B23C5/10 ,  B23C5/20

    摘要： A cutting insert includes a main surface formed in a substantially parallelogram shape and having a pair of acute angle corner portions and a pair of obtuse angle corner portions, a seating surface that faces a side opposite to the main surface, a side surface that connects the main surface and the seating surface to each other, a corner cutting edge disposed in the acute angle corner portion, and a main cutting edge and a subsidiary cutting edge which are respectively disposed in a pair of side ridge portions of the main surface located each other across the acute angle corner portion. A mounting hole into which the fixing member is inserted penetrates the main surface and the seating surface. The main cutting edge is inclined at an inclination angle equal to or larger than 8° with reference to a plane perpendicular to an axial direction of the mounting hole.

    HARD COATING, HARD-COATED TOOL, AND THEIR PRODUCTION METHODS
    12.
    发明申请
    HARD COATING, HARD-COATED TOOL, AND THEIR PRODUCTION METHODS 审中-公开

    公开(公告)号：US20190177839A1

    公开(公告)日：2019-06-13

    申请号：US16310586

    申请日：2017-06-30

    申请人： Mitsubishi Hitachi Tool Engineering, Ltd.

    发明人： Yuuzoh Fukunaga ,  Masayuki Imai

    IPC分类号： C23C16/34 ,  B23B27/14 ,  C23C16/455

    摘要： A hard coating comprising a lower layer formed by an fcc-based titanium aluminum nitride coating, and an upper layer formed by an aluminum nitride coating having an hcp crystal system, the upper layer having a columnar crystal structure, the columnar crystals having an average transverse cross section diameter of 0.05-0.6 μm, and a ratio of an X-ray diffraction peak value Ia(002) of (002) planes to an X-ray diffraction peak value Ia(100) of (100) planes in the upper layer meeting the relation of Ia(002)/Ia(100)≥6.

    Indexable rotary cutting tool and insert used therein
    14.
    发明授权
    Indexable rotary cutting tool and insert used therein 有权

    公开(公告)号：US10207342B2

    公开(公告)日：2019-02-19

    申请号：US14917838

    申请日：2014-09-10

    申请人： Mitsubishi Hitachi Tool Engineering, Ltd.

    发明人： Hisanori Mura ,  Tadahiro Hibata ,  Tomohiro Murata

    IPC分类号： B23C5/20 ,  B23C5/10

    摘要： An insert detachably attached to an indexable rotary cutting tool, having an upper surface having cutting edges along the ridgeline, a lower surface, side surfaces, and a center hole for a fastening screw; each cutting edge having a corner cutting edge formed in each acute corner portion, and a bottom cutting edge and a peripheral cutting edge formed along the ridgelines on both sides of the corner cutting edge; the bottom cutting edge and the peripheral cutting edge having different clearance angles; a flank of the corner cutting edge having an angle-changing surface portion having a clearance angle continuously changing in a region from the bottom cutting edge to the peripheral cutting edge; and the length of the peripheral cutting edge being restricted by a receding portion adjacent to an upper end of the peripheral cutting edge.

    SCREW THREAD CUTTER
    15.
    发明申请
    SCREW THREAD CUTTER 审中-公开

    公开(公告)号：US20190009352A1

    公开(公告)日：2019-01-10

    申请号：US16064700

    申请日：2017-01-04

    申请人： Mitsubishi Hitachi Tool Engineering, Ltd.

    发明人： Yuuki Iharada ,  Mitsuhiro Yokokawa

    IPC分类号： B23G5/18 ,  B23C5/10

    摘要： In a screw thread cutter, a screw thread-cutting edge is formed on an outer periphery of a tip portion of a cutter body. Finishing edge-thread ridge height from a tangent line passing through valley bottoms of second and third valley portions to outer peripheral ends of first and second finishing edges are equal to each other. A preceding edge-thread ridge height from the tangent line to an outer peripheral end of a preceding edge is lower than each of the finishing edge-thread ridge height. A first valley portion-depth from the outer peripheral end of the first finishing edge to the valley bottom of the first valley portion is deeper than a second valley portion-depth from the outer peripheral end of the second finishing edge to the valley bottom of the second valley portion.

    MULTI-FLUTE BALL END MILL
    20.
    发明申请
    MULTI-FLUTE BALL END MILL 审中-公开

    公开(公告)号：US20170282261A1

    公开(公告)日：2017-10-05

    申请号：US15511409

    申请日：2015-10-26

    申请人： Mitsubishi Hitachi Tool Engineering, Ltd.

    发明人： Shinjiroh Sakai ,  Mitsuhiro Yokokawa ,  Tomohiro Satou

    IPC分类号： B23C5/10

    CPC分类号： B23C5/1009 ,  B23C5/10 ,  B23C2210/0428 ,  B23C2210/0435 ,  B23C2210/202 ,  B23C2210/40 ,  B23C2210/54 ,  B23C2220/60

    摘要： A multi-flute ball end mill of the present invention includes: a shank portion configured to rotate about a rotational axis; a cutting edge portion; three or more ball edges formed on the cutting edge portion; gashes formed between the ball edges; peripheral cutting edges continuous with end portions of the ball edges on the shank portion side; and flutes formed between the peripheral cutting edges continuously with the gashes. The degree of curvature of the ball edges is 35% to 55%. Each of the gashes includes four faces of a rake face of each of the ball edges, a gash wall face, a first gash face, and a second gash face. The second gash face is formed such that the closer the second gash face is to the rotation center point, the more inwardly the second gash face enters a second face of each of the ball edges.