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公开(公告)号：EP3213846A1
公开(公告)日：2017-09-06
申请号：EP15855880.9
申请日：2015-10-26
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.
摘要翻译： 本发明的多头球头立铣刀包括：柄部，其构造成绕旋转轴线旋转; 切削刃部分; 三个或更多的球边缘形成在切割边缘部分上; 在球边缘之间形成的凹痕; 外周刃与柄部侧的球边缘的端部连续; 并且外周切削刃之间的凹槽连续地与凹槽形成。 球边的曲率为35％至55％。 每个球面包括每个球边缘的前刀面的四个面，切口壁面，第一切口面和第二切口面。 第二切口面形成为使得第二切口面越靠近旋转中心点，第二切口面越向内进入每个球边缘的第二面。
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公开(公告)号：EP3597338A1
公开(公告)日：2020-01-22
申请号：EP18767828.9
申请日：2018-02-19
IPC分类号： B23C5/10
摘要： A ball end mill according to the present invention includes an end mill body (2) which is formed in a shaft shape, a plurality of convex arcuate end cutting edges (9) which are disposed on a tip portion of the end mill body (2) at intervals around an axis (O) and form a hemispherical shape such that a rotational locus around the axis has a center on the axis (O), and a plurality of gashes (7) which are respectively disposed to be adjacent to the plurality of end cutting edges (9) in an end mill rotation direction around the axis (O). The plurality of end cutting edges (9) includes a first end cutting edge of which the cutting edge length toward an inside in a radial direction orthogonal to the axis (O) is longest among the plurality of end cutting edges (9), a second end cutting edge which is adjacent to the first end cutting edge in the end mill rotation direction and of which the cutting edge length toward the inside in the radial direction is shorter than that of the first end cutting edge, and a third end cutting edge which is adjacent to the second end cutting edge in the end mill rotation direction and of which the cutting edge length toward the inside in the radial direction is shorter than that of the second end cutting edge. The depth of a gash (7B) of the second end cutting edge is deeper than that of a gash of the third end cutting edge (7C), and a depth of a gash (7A) of the first end cutting edge is deeper than that of the gash (7B) of the second end cutting edge.
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公开(公告)号：EP3403753A1
公开(公告)日：2018-11-21
申请号：EP17738312.2
申请日：2017-01-04
发明人： IHARADA Yuuki , YOKOKAWA Mitsuhiro
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.
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