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公开(公告)号：US11045889B2
公开(公告)日：2021-06-29
申请号：US15764551
申请日：2016-09-28
发明人： Mitsuhiro Yokokawa , Yuuki Iharada
摘要： In order to form an internal thread having a concave surface having the same shape as that obtained by using a thread cutting blade having a convex surface without using such a thread cutting blade in formation of an internal thread hole in a mold component or the like using a thread milling cutter, a trimming blade has a leading-side flank surface extending from an axial tip side of a tool body to the rear side, a top surface formed continuously to the leading-side flank surface in the axial direction, and a trailing-side flank surface formed continuously to the top surface in the axial direction. Two or more chamfered surfaces are formed between the leading-side flank surface and the top surface and between the top surface and the trailing-side flank surface in the trimming blade.
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公开(公告)号：USD908752S1
公开(公告)日：2021-01-26
申请号：US29710097
申请日：2019-10-21
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公开(公告)号：USD907671S1
公开(公告)日：2021-01-12
申请号：US29710100
申请日：2019-10-21
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公开(公告)号：US20200376567A1
公开(公告)日：2020-12-03
申请号：US16643932
申请日：2018-11-19
发明人： Masakazu Isaka
摘要： Provided is a coated cutting tool, which includes a hard coating film containing a layer (c) which is a layered coating film made by alternately layering a nitride or carbonitride layer (c1) that contains, with respect to the total amount of metal elements (including metalloid elements), at least 55 atom % aluminum (Al), chromium (Cr) having the second highest content percentage, and at least silicon (Si), and a nitride or carbonitride layer (c2) that contains, with respect to the total amount of metal elements (including metalloid elements), at least 55 atom % aluminum (Al) and titanium (Ti) having the second highest content, each layer having a thickness of 50 nm or less. A peak intensity Ih ascribable to an hcp (010) plane of AlN in the layer (c) and the total peak intensity Is ascribable to other predetermined crystal phases satisfy a relationship of Ih×100/Is≤15.
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公开(公告)号：US20200230705A1
公开(公告)日：2020-07-23
申请号：US16630934
申请日：2018-09-19
发明人： Tomoya Sasaki
摘要： Provided is a coated cutting tool that has a nitride hard coating that contains Ti at 70 at % to 95 at % and Si at 5 at % to 30 at % with respect to the total amount of metallic elements, and Ar at 0.05 at % to 0.20 at % with respect to the total amount of metallic and non-metallic elements, has a NaCl-type crystalline structure, exhibits maximum diffraction peak intensity in the (200) plane, and has an average grain size of 5 nm to 30 nm. When 100 at % is defined as the total of content rates of the metallic elements, nitrogen, oxygen, and carbon in a composition at intervals of 20 nm from a depth of 20 nm to 200 nm from a surface of the hard coating, the content rate of nitrogen is 50.0 at % or more.
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公开(公告)号：US10688570B2
公开(公告)日：2020-06-23
申请号：US16076495
申请日：2016-08-19
摘要： An indexable rotary cutting tool and insert is capable of performing a high-accuracy cutting process with high efficiency. A twist angle of an outer peripheral cutting edge of the tool has a positive value, an axial rake angle of the cutting edge of a corner R of the tool at a boundary point between the cutting edge of the corner R and the outer peripheral cutting edge has a positive value, the axial rake angle of the cutting edge of the corner R at a reference point has a negative value, and the radial rake angle at least between the boundary point and the reference point in an entire edge length region of the cutting edge of the corner R has a negative value. The radial rake angle at the reference point is smaller than the radial rake angle at the boundary point.
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公开(公告)号：US20200023444A1
公开(公告)日：2020-01-23
申请号：US16499415
申请日：2018-10-30
发明人： Hiroto Saitoh , Syoujirou Touma
摘要： A cutting insert includes a polygonal plate-shaped insert main body having two polygonal surfaces, a side surface having a flank, and a cutting edge to be formed in an intersection ridgeline portion between a rake face and the flank. The insert main body has a rotationally symmetrical shape with respect to an insert center line, and has a front-rear reversely symmetrical shape with respect to the polygonal surface. The cutting edge includes a corner cutting edge, a major cutting edge extending from an one end of the corner cutting edge, and a wiper cutting edge extending from an one end of the major cutting edge in a direction intersecting the major cutting edge at an obtuse angle. A first region is disposed where a clearance angle of the flank gradually decreases to a negative angle after continuously passing through 0° from a positive angle.
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公开(公告)号：US10512976B2
公开(公告)日：2019-12-24
申请号：US15757769
申请日：2015-09-25
摘要： A detachable cutting insert for an indexable rotary cutting tool, has a cutting edge portion that includes a major cutting edge continuous with a first end of a first corner edge near a short-side-direction side surface, which is formed into a straight line. The cutting insert has a first minor cutting edge that is continuous with a second end of the major cutting edge, which is formed into a circular arc. The cutting insert has a second minor cutting edge that is continuous with a third end of the first minor cutting edge, which is formed into a straight line. In a cross-sectional view of a rake face of the second minor cutting edge, perpendicular to the second minor cutting edge, a cross-sectional ridgeline of the rake face of the second minor cutting edge is formed into a convex shape protruding above a cross-sectional ridgeline of a reference plane.
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公开(公告)号：US10507535B2
公开(公告)日：2019-12-17
申请号：US16325913
申请日：2017-07-24
发明人： Yoshiyuki Kobayashi
摘要： A cutting insert includes a rake face, a flank surface, and a cutting edge, the cutting edge includes a bottom cutting edge that is positioned at a front end in a central axis direction and forms a convex arc shape and an outer peripheral cutting edge aligned with a radial-direction outer end of the bottom cutting edge and forms a convex arc shape of which a curvature radius is larger than that of the bottom cutting edge, an angle formed between a tangent line to a boundary point between the bottom cutting edge and the outer peripheral cutting edge and the central axis is less than 45°, a curvature radius R1 of the bottom cutting edge is 0.3 to 10 mm, and a ratio (R2/R1) of a curvature radius R2 of the outer peripheral cutting edge to the curvature radius R1 of the bottom cutting edge is 3.6 to 333.
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公开(公告)号：US20190321897A1
公开(公告)日：2019-10-24
申请号：US16464881
申请日：2017-11-30
发明人： Takafumi Sai , Makoto Baba , Akira Tokuyama
IPC分类号： B23C5/10
摘要： The present invention provides an end mill including: a shaft-shaped end mill main body; a chip discharge groove extending from a leading end to a trailing end in an axial direction of the end mill main body; a bottom blade which is provided at a leading end portion in the axial direction of the end mill main body and has a spherical shape in which a rotation locus around the axis has a center on the axis; and an outer peripheral blade which is provided along the chip discharge groove, and in which a rotation locus around the axis is convex outward. A curvature radius of the rotation locus of the outer peripheral blade is larger than a curvature radius of the rotation locus of the bottom blade. A twist angle of the outer peripheral blade is 20° or more.
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