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207 条记录 (耗时 0.016 秒)

    THREAD-FORMING TAP
    5.
    发明公开
    THREAD-FORMING TAP 审中-公开

    公开(公告)号：EP3804895A1

    公开(公告)日：2021-04-14

    申请号：EP18920669.1

    申请日：2018-05-31

    申请人： OSG Corporation

    发明人： HARADA Kazumitsu

    IPC分类号： B23G7/02 ,  B23G5/06

    摘要： Since a sharp crest 40 having a triangular cross-sectional shape is provided in a top portion of a thread ridge 10 of an external thread in the leading portion 24, the thread ridge 18 is easily caused to bite into an inner-wall-surface layer portion of a prepared hole of a workpiece in a tapping operation, thereby reducing torque and thrust load during the tapping operation. Further, since a pair of side surfaces 42, 44 of the sharp crest 40 are inclined by respective inclination angles β1, β2 that are larger than flank angles α1, α2 of the thread ridge 18, an angle (internal angle) of a top end portion 46 in which the side surfaces 42, 44 intersect with each other is larger than an angle defined between extensions of the flanks 30, 32, thereby restraining breakage or the like due to lack of strength of the top portion. That is, it is possible to restrain reduction of the tool life due to wear or the like, by reducing the torque and the thrust load during the tapping operation while assuring the strength of the top portion of the thread ridge 18.

    SURFACE-COATED CUTTING TOOL AND MANUFACTURING METHOD THEREFOR
    6.
    发明公开
    SURFACE-COATED CUTTING TOOL AND MANUFACTURING METHOD THEREFOR 审中-公开

    公开(公告)号：EP3769871A1

    公开(公告)日：2021-01-27

    申请号：EP18911128.9

    申请日：2018-12-27

    申请人： Sumitomo Electric Hardmetal Corp.

    发明人： PASEUTH, Anongsack ,  KIDO, Yasuki ,  OKUNO, Susumu ,  IMAMURA, Shinya

    IPC分类号： B23B27/14 ,  B23B51/00 ,  B23C5/16 ,  B23D77/00 ,  B23F21/00 ,  B23G5/06 ,  C23C16/34

    摘要： A surface-coated cutting tool includes a substrate and a coating film that coats the substrate, wherein the coating film includes a hard coating layer constituted of a domain region and a matrix region, the domain region is a region having a plurality of portions divided and distributed in the matrix region, the domain region has a structure in which a first layer composed of a first Al x1 Ti (1-x1) compound and a second layer composed of a second Al x2 Ti (1-x2) compound are layered on each other, the matrix region has a structure in which a third layer composed of a third Al x3 Ti (1-x3) compound and a fourth layer composed of a fourth Al x4 Ti (1-x4) compound are layered on each other, the first AlTi compound has a cubic crystal structure, the second AlTi compound has a cubic crystal structure, the third AlTi compound has a hexagonal crystal structure, the fourth AlTi compound has a cubic crystal structure, x1 is more than or equal to 0.77 and less than or equal to 0.9, x2 is more than or equal to 0.5 and less than or equal to 0.6, x3 is more than or equal to 0.85 and less than or equal to 0.95, and x4 is more than or equal to 0.55 and less than or equal to 0.62.

    SURFACE-COATED CUTTING TOOL AND PRODUCTION METHOD THEREFOR
    7.
    发明公开
    SURFACE-COATED CUTTING TOOL AND PRODUCTION METHOD THEREFOR 审中-公开

    公开(公告)号：EP3590636A1

    公开(公告)日：2020-01-08

    申请号：EP17898614.7

    申请日：2017-07-07

    申请人： Sumitomo Electric Hardmetal Corp. ,  Sumitomo Electric Industries, Ltd.

    发明人： PASEUTH, Anongsack ,  KIDO, Yasuki ,  IMAMURA, Shinya ,  KURAMOCHI, Koji

    IPC分类号： B23B27/14 ,  B23B51/00 ,  B23C5/16 ,  B23D77/00 ,  B23F21/00 ,  B23G5/06 ,  C23C16/34 ,  C23C16/56

    摘要： A surface-coated cutting tool includes a substrate and a coating formed on a surface of the substrate, the coating including one or two or more layers, at least one of the layers being an Al-rich layer including hard particles, the hard particle having a sodium chloride type crystal structure, and including a first unit phase in a form of a plurality of lumps and a second unit phase interposed between the lumps of the first unit phase, the first unit phase being composed of a nitride or carbonitride of Al x Ti 1-x , the first unit phase having an atomic ratio x of Al of 0.7 or more and 0.96 or less, the second unit phase being composed of a nitride or carbonitride of Al y Ti 1-y , the second unit phase having an atomic ratio y of Al exceeding 0.5 and less than 0.7, the Al-rich layer exhibiting a maximum peak in the (200) plane when the Al-rich layer is analyzed through X-ray diffraction in a direction normal to a surface of the coating.

    TAPERED PIPE THREAD-MACHINING SPIRAL TAP
    10.
    发明公开
    TAPERED PIPE THREAD-MACHINING SPIRAL TAP 审中-公开

    公开(公告)号：EP3385018A1

    公开(公告)日：2018-10-10

    申请号：EP15909782.3

    申请日：2015-12-02

    申请人： OSG Corporation

    发明人： NAKAJIMA Takayuki

    IPC分类号： B23G5/06

    CPC分类号： B23G5/06 ,  B23G2200/30 ,  B23G2200/48

    摘要： Provided is a pipe-tapered-thread machining spiral tap that restrains occurrence of tearing and formation of cutting edge mark in the machined internal thread upon stop of rotation of the tap.
    The pipe-tapered-thread machining spiral tap 10 has three, four or five spiral flutes 20 each having a helix angle β of not smaller than 30° and smaller than 50°. A flute width ratio AG/(AG+AL) is 0.3-0.5, where AG represents a central angle which is subtended by each of the spiral flutes 20 and which is defined at a center corresponding to a rotation axis C in a cross section that is perpendicular to the rotation axis C, and AL represents a central angle which is subtended by each of the lands 22 and which is defined at the center corresponding to the rotation axis C in the cross section. Thus, it is possible to obtain the pipe-tapered-thread machining spiral tap 10 in which occurrence of tearing is restrained owing to presence of the spiral flutes 20 each having the helix angle β that is not smaller than 30° and smaller than 50°, and in which formation of mark of the cutting edge in the machined internal thread upon stop of rotation of the tap is retrained owing to a short distance between the cutting edge 24 and the back edge 26.