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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：EP3031559A1
公开(公告)日：2016-06-15
申请号：EP14834080.5
申请日：2014-08-06
发明人： SAKAI Shinjiroh
IPC分类号： B23C5/10
CPC分类号： B23C5/1009 , B23C2210/0428 , B23C2210/0435 , B23C2210/0457 , B23C2210/0485 , B23C2210/202 , B23C2210/203 , B23C2210/204 , B23C2210/205 , B23C2210/40 , B23C2210/54
摘要： A multi-flute ball end mill comprising a shank portion, a cutting edge portion having a ball-shaped tip portion, and 3 or more cutting edges formed in the cutting edge portion; each cutting edge being constituted by a peripheral cutting edge having a twist angle η of 35-45°, and a ball-end cutting edge having a twist angle µ at the outermost peripheral point, the twist angle η and the twist angle µ meeting the relation of η - µ ≤ 7°, such that the ball-end cutting edge is smoothly connected to the peripheral cutting edge; the ball-end cutting edge having a radial rake angle of -37° to -11°; the peripheral cutting edge having a radial rake angle of 2-8°; and a center-lowered, inclined cutting edge integrally extending from a tip end of each ball-end cutting edge to a rotation center point, in a tip end portion of the ball portion near the rotation center point.
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