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公开(公告)号：US10766077B2
公开(公告)日：2020-09-08
申请号：US16082029
申请日：2017-02-27
发明人： Yoshikatsu Mori , Kouki Matsubara , Ryusei Hamada , Masaaki Jindai , Kazuhiko Kashima , Yasuhiro Kajiwara
IPC分类号： B23B31/107 , B23B51/06 , B23B51/02
摘要： The holder has a first surface and a second surface. The head includes a cutting edge portion and a shank portion. The holder is provided with a first hole and a second hole communicating with the first hole, the first hole extending in a third direction inclined by a second angle relative to a second direction extending from the second surface toward the first surface when viewed in a direction parallel to the axis line. The shank portion has a flat surface portion, and is provided inside the second hole. The fastening portion is provided inside the first hole, and is in contact with the flat surface portion. In a plane perpendicular to the axis line, a third angle between the second direction and a fourth direction perpendicular to the flat surface portion is larger than the second angle. The third angle is less than 90°.
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公开(公告)号：US10155269B2
公开(公告)日：2018-12-18
申请号：US15504970
申请日：2015-09-09
发明人： Masaaki Jindai
摘要： In a drill, a negative land is provided on a rake face, and a ridge line at an intersecting position of the negative land and a flank face, a ridge line at an intersecting position of the flank face and a margin, and a ridge line at an intersecting position of the negative land and the margin are convex faces in a longitudinal rectangular cross section. When a curvature radius of the convex face of a first ridge line at the intersecting position of the flank face and the negative land is 1, at curvature radius of the convex face of a second ridge line at the intersecting position of the flank face and the margin is 0.8 to 1.5 times the curvature radius of the first ridge line, and a curvature radius of the convex face of a fourth ridge line at the intersecting position of the negative land and the margin is 1.5 to 3.0 times the curvature radius of the first ridge line.
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公开(公告)号：US20190232392A1
公开(公告)日：2019-08-01
申请号：US16318285
申请日：2018-07-06
IPC分类号： B23B51/02
CPC分类号： B23B51/02 , B23B51/00 , B23B2251/08 , B23B2251/12 , B23B2251/14
摘要： The negative land includes: a first region in which a space between the upper cutting edge and the lower cutting edge becomes wider toward the outer circumferential surface; and a second region which is continuous to the first region and in which the space becomes wider toward the rotation axis. In a cross section perpendicular to the rotation axis, the rake face includes a return face continuous to the outer circumferential surface, the return face being recessed opposite to a rotation direction of the drill. When a first boundary represents a boundary between the outer circumferential surface and the first region and a second boundary represents a boundary between the first region and the second region, a length of the first boundary is larger than a length of the second boundary in a direction parallel to the rotation axis. The second boundary is continuous to the return face.
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公开(公告)号：US20150283625A1
公开(公告)日：2015-10-08
申请号：US14436522
申请日：2013-10-08
发明人： Yoshiji Sato , Kazumasa Kurizuka , Masaaki Jindai
IPC分类号： B23B51/02
CPC分类号： B23B51/02 , B23B2251/14 , B23B2251/18 , B23B2251/443 , Y10T408/9097
摘要： The problem of making it possible to shorten as much as possible the distance from a major margin to a minor margin of a two-edge double margin drill in an axial direction is addressed. An interval between major margins and respective minor margins, which are provided at outer peripheries of lands, are set at 80° to 100°, flank faces both include a flat second flank face and a flat third flank face, web thinning portions including web thinning surfaces having convex arcs in a direction of drill rotation in front view of the drill are formed at a central portion of an end, and an outer end of each web thinning surface in a radial direction is disposed behind an end of the corresponding minor margin in the direction of drill rotation and extends to the outer periphery of the corresponding land.
摘要翻译： 解决了使双边缘双向钻头在轴向方向上从主边缘到微小边缘的距离尽可能多地缩短的问题。 在外围的陆地上提供的主要边缘和相应的小边缘之间的间隔设定在80°至100°，侧面均包括平坦的第二侧面和平坦的第三侧面，纤维网变薄部分包括纤维网变薄 在钻头的前视图中在钻头旋转方向上具有凸弧的表面形成在端部的中心部分，并且每个幅材变薄表面的径向外侧的末端设置在相应的微小边缘的末端后面 钻头旋转的方向并延伸到对应的地面的外围。
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公开(公告)号：US20190232388A1
公开(公告)日：2019-08-01
申请号：US16082029
申请日：2017-02-27
发明人： Yoshikatsu Mori , Kouki Matsubara , Ryusei Hamada , Masaaki Jindai , Kazuhiko Kashima , Yasuhiro Kajiwara
IPC分类号： B23B31/107 , B23B51/06
摘要： The holder has a first surface and a second surface. The head includes a cutting edge portion and a shank portion. The holder is provided with a first hole and a second hole communicating with the first hole, the first hole extending in a third direction inclined by a second angle relative to a second direction extending from the second surface toward the first surface when viewed in a direction parallel to the axis line. The shank portion has a flat surface portion, and is provided inside the second hole. The fastening portion is provided inside the first hole, and is in contact with the flat surface portion. In a plane perpendicular to the axis line, a third angle between the second direction and a fourth direction perpendicular to the flat surface portion is larger than the second angle. The third angle is less than 90°.
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公开(公告)号：US10300534B2
公开(公告)日：2019-05-28
申请号：US15504484
申请日：2015-08-19
摘要： Provided is a drill having a flat-shaped drill tip and excellent in cutting edge strength and chip removability. The drill includes: a cutting edge extending in a direction at an angle α of not less than 85° and not more than 90° with respect to a drill axis (line O-O); a flank face contiguous to the cutting edge and having a clearance angle β of not less than 5° and not more than 10° with respect to the drill axis (line O-O); and a rake face located opposite to the flank face across the cutting edge, the cutting edge includes a recess receding in a direction parallel to the drill axis (line O-O), and the rake face includes a front clearance formed at a side of an outer periphery of the drill.
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公开(公告)号：US11660691B2
公开(公告)日：2023-05-30
申请号：US17253896
申请日：2020-03-10
发明人： Masashi Yamada , Masaaki Jindai , Jun Okamoto , Futoshi Takeshita , Kyosuke Kai , Katsutoshi Fukuda
CPC分类号： B23D77/00 , B23D77/12 , B23D2277/2464
摘要： A reamer is rotated about a central axis and has, in a direction along a central axis, a tool front end and a tool rear end that is an end opposite to the tool front end. The reamer includes a blade on a tool front end side. The blade has, on a circumferential surface, a chamfered cutting edge located on the tool front end side, a circumferential cutting edge contiguous to an end of the chamfered cutting edge on a tool rear end side, and a margin that is a surface contiguous to the circumferential cutting edge. The circumferential cutting edge includes a front end portion between a first position and a second position, the first position being an end on a chamfered cutting edge side, the second position having a distance of 1 mm from the first position in a direction of extension of the circumferential cutting edge.
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公开(公告)号：US20170232529A1
公开(公告)日：2017-08-17
申请号：US15504484
申请日：2015-08-19
IPC分类号： B23B51/02
CPC分类号： B23B51/02 , B23B51/00 , B23B2251/04 , B23B2251/08 , B23B2251/14 , B23B2251/18 , Y10T408/9097
摘要： Provided is a drill having a flat-shaped drill tip and excellent in cutting edge strength and chip removability. The drill includes: a cutting edge extending in a direction at an angle α of not less than 85° and not more than 90° with respect to a drill axis (line O-O); a flank face contiguous to the cutting edge and having a clearance angle β of not less than 5° and not more than 10° with respect to the drill axis (line O-O); and a rake face located opposite to the flank face across the cutting edge, the cutting edge includes a recess receding in a direction parallel to the drill axis (line O-O), and the rake face includes a front clearance formed at a side of an outer periphery of the drill.
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公开(公告)号：US20150283624A1
公开(公告)日：2015-10-08
申请号：US14434904
申请日：2013-10-24
发明人： Masaaki Jindai
IPC分类号： B23B51/02
CPC分类号： B23B51/02 , B23B51/06 , B23B2251/14 , B23B2251/18 , B23B2251/408 , B23B2251/426 , Y10T408/9097
摘要： A small-diameter drill having a diameter of φ3 mm or less and an end that has undergone cross thinning is provided such that in a front view, a flute portion cutting edge is curved in concave with a degree of concavity with respect to an imaginary straight line in a range of 0.5 to 2% of a drill diameter, the imaginary straight line connecting the radially outer end of the flute portion cutting edge and the radially outer end of thinning portion cutting edge, the ratio of length of the thinning portion cutting edge to length of the flute portion cutting edge is set to 0.6 to 0.9:1, and in an axially perpendicular cross-sectional view, curvature radius of a heel-side flute surface of the flute is set to be smaller than curvature radius of a flute surface along the flute portion cutting edge.
摘要翻译： 具有直径为3mm以下的小直径钻头和已经经历交叉变薄的端部设置成使得在前视图中，凹槽部分切割边缘相对于 虚拟直线在钻头直径的0.5〜2％的范围内，连接槽部分切削刃的径向外端和变薄部分切削刃的径向外端的假想直线，减薄部分的长度比 凹槽部切削刃的切削刃长度设定为0.6〜0.9:1，在轴向垂直剖视图中，凹槽的后跟侧凹槽表面的曲率半径被设定为小于曲率半径 沿着凹槽部分切割边缘的凹槽表面。
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公开(公告)号：US10646934B2
公开(公告)日：2020-05-12
申请号：US16318285
申请日：2018-07-06
摘要： The negative land includes: a first region in which a space between the upper cutting edge and the lower cutting edge becomes wider toward the outer circumferential surface; and a second region which is continuous to the first region and in which the space becomes wider toward the rotation axis. In a cross section perpendicular to the rotation axis, the rake face includes a return face continuous to the outer circumferential surface, the return face being recessed opposite to a rotation direction of the drill. When a first boundary represents a boundary between the outer circumferential surface and the first region and a second boundary represents a boundary between the first region and the second region, a length of the first boundary is larger than a length of the second boundary in a direction parallel to the rotation axis. The second boundary is continuous to the return face.
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