Patents Assigned to Sumitomo Electric Hardmetal Corp.
  • Publication number: 20190232386
    Abstract: A cutting tool includes a substrate and a coating film provided on the substrate, wherein the substrate is a cBN sintered material including more than or equal to 30 volume % and less than 80 volume % of cBN and a binder, the coating film includes a compound layer constituted of a composition of Ti1-xAlxC1-aNa, where 0.70?X?0.95 and 0<a?1, and the compound layer has a NaCl type crystal structure in a whole or part of the compound layer.
    Type: Application
    Filed: September 1, 2017
    Publication date: August 1, 2019
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Nozomi Tsukihara, Makoto Setoyama, Anongsack Paseuth
  • Publication number: 20190232378
    Abstract: The upper surface includes a first breaker projection face extending along the first side surface, a second breaker projection face extending along the second side surface, and a rake face located between the first breaker projection face and the second breaker projection face in top view. In a direction from the rear surface to the front surface, a first front end of the first breaker projection face is located ahead of a second front end of the second breaker projection face. A cutting edge has a first cutting edge portion and a second cutting edge portion. In a direction perpendicular to the reference surface, the second breaker projection face is lower than the first breaker projection face, and a boundary between the first cutting edge portion and the second cutting edge portion is lower than the second breaker projection face.
    Type: Application
    Filed: October 30, 2017
    Publication date: August 1, 2019
    Applicants: SUMITOMO ELECTRIC HARDMETAL CORP., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Tomoyuki Fukuyama, Junya Okida, Yosuke Shimamoto
  • Publication number: 20190233922
    Abstract: A cemented carbide comprising a first hard phase composed of tungsten carbide particles and a binder phase including Co, the cemented carbide having a ratio Nt/Na of 0.9 or more, where, in any surface or any cross section of the cemented carbide, a region in which there is a distance X of 5 nm or less between surfaces respectively of tungsten carbide particles adjacent to each other, the surfaces facing each other along a length L of 100 nm or more, is referred to as a WC/WC interface, and Na represents a total number of WC/WC interfaces and Nt represents a number of WC/WC interfaces having distance X of 1 nm or more and 5 nm or less and having therein an atomic percentage of Co higher than an average value of atomic percentages of Co in the tungsten carbide particles.
    Type: Application
    Filed: July 2, 2018
    Publication date: August 1, 2019
    Applicants: SUMITOMO ELECTRIC HARDMETAL CORP., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Yasuki Kido, Daiji Tabayashi, Shinya Imamura
  • Publication number: 20190232388
    Abstract: 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°.
    Type: Application
    Filed: February 27, 2017
    Publication date: August 1, 2019
    Applicants: SUMITOMO ELECTRIC HARDMETAL CORP., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Yoshikatsu Mori, Kouki Matsubara, Ryusei Hamada, Masaaki Jindai, Kazuhiko Kashima, Yasuhiro Kajiwara
  • Publication number: 20190218685
    Abstract: In a single-crystal diamond material, a concentration of non-substitutional nitrogen atoms is not more than 200 ppm, a concentration of substitutional nitrogen atoms is lower than the concentration of the non-substitutional nitrogen atoms, and the single-crystal diamond material has a crystal growth main surface having an off angle of not more than 20°. A perforated tool includes a single-crystal diamond die, wherein in the single-crystal diamond die, a concentration of non-substitutional nitrogen atoms is not more than 200 ppm, a concentration of substitutional nitrogen atoms is lower than the concentration of the non-substitutional nitrogen atoms, and the single-crystal diamond die has a low-index plane represented by a Miller index of not less than ?5 and not more than 5 in an integer, a perpendicular line of the low-index plane having an off angle of not more than 20° relative to an orientation of a hole for wire drawing.
    Type: Application
    Filed: March 20, 2019
    Publication date: July 18, 2019
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Yoshiki Nishibayashi, Natsuo Tatsumi, Hitoshi Sumiya, Akihiko Ueda, Yutaka Kobayashi
  • Patent number: 10343220
    Abstract: A method includes positioning a linear cutting edge inclined at an angle greater than 0° and smaller than 90° with respect to a Z axis at a cutting start position displaced from a position on an X axis along a direction of a Y axis in a three-dimensional orthogonal coordinate system in which an axial line of rotation of a rotation symmetry plane is defined as the Z axis, an axis in a radial direction of the rotation symmetry plane is defined as the X axis, and an axis orthogonal to both of the Z axis and the X axis is defined as the Y axis and machining the rotation symmetry plane by feeding the cutting edge from the cutting start position along a track having an X axis component, a Y axis component, and a Z axis component while the cutting edge is in contact with a rotating machine component.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: July 9, 2019
    Assignees: SUMITOMO ELECTRIC HARDMETAL CORP., Sumitomo Electric Industries, Ltd., Sumitomo electric Tool Net, Inc.
    Inventors: Yasuyuki Kanada, Kunishige Tanaka, Soichiro Okumura, Jun Okamoto, Futoshi Takeshita
  • Patent number: 10328495
    Abstract: A cutting tool according to an aspect of the present invention is a cutting tool for cutting a rotationally symmetrical surface of a rotating workpiece. The cutting includes the step of feeding the cutting tool in a direction inclined with respect to a rotational axis of the rotationally symmetrical surface, while holding the cutting tool in contact with the rotationally symmetrical surface. In the step of feeding the cutting tool, the cutting tool has a point that is in contact with the rotationally symmetrical surface and the point shifts as the cutting tool is fed. The cutting tool includes: a rake face; a flank face; and a cutting edge connecting the rake face and the flank face. The cutting edge as seen from above the flank face has a shape including at least one arc, and the arc has a radius of curvature of not less than 100 mm and not more than 500 mm.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: June 25, 2019
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Yasuyuki Kanada, Kunishige Tanaka, Shota Takemura
  • Publication number: 20190176250
    Abstract: The cutting edge has: a corner cutting edge; a flat cutting edge continuous to a first end portion of the corner cutting edge; and a main cutting edge continuous to a second end portion of the corner cutting edge opposite to the first end portion of the corner cutting edge. The rake face has: a first rising surface portion; and a first rake face portion continuous to the first rising surface portion and located opposite to the corner cutting edge when viewed from the first rising surface portion. When viewed in a direction perpendicular to the reference surface, the first boundary includes a first line segment extending, from one of the flat cutting edge and the corner cutting edge, in a direction crossing a straight line extending along the main cutting edge.
    Type: Application
    Filed: January 16, 2018
    Publication date: June 13, 2019
    Applicants: SUMITOMO ELECTRIC HARDMETAL CORP., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Shota Tsujimoto, Yusuke Koike, Yasuyuki Kanada, Atsuhiko Maeta, Tomoyuki Fukuyama, Yoshinari Nagami
  • Patent number: 10316430
    Abstract: Single crystal diamond of which hardness and chipping resistance have been improved in a balanced manner, a method for manufacturing the single crystal diamond, and a tool containing the diamond are provided. Single crystal diamond contains nitrogen atoms, and a ratio of the number of isolated substitutional nitrogen atoms in the single crystal diamond to the total number of nitrogen atoms in the single crystal diamond is not lower than 0.02% and lower than 40%.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: June 11, 2019
    Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Yoshiki Nishibayashi, Natsuo Tatsumi, Hitoshi Sumiya, Akihiko Ueda, Yutaka Kobayashi
  • Patent number: 10307829
    Abstract: A composite sintered body according to the present invention contains at least cubic boron nitride and a binder. Cubic boron nitride has a continuous skeleton structure as a result of bonding of a plurality of first cubic boron nitride particles to each other. The binder has a continuous structure as a result of bonding of a plurality of binder particles to each other, that are present in a region except for a bonding interface where the first cubic boron nitride particles are bonded to each other. Second cubic boron nitride particles isolated from the first cubic boron nitride particles forming the skeleton structure are dispersed in the continuous structure of the binder particles.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: June 4, 2019
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Katsumi Okamura, Satoru Kukino, Tomohiro Fukaya
  • Patent number: 10300534
    Abstract: 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 ? 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 ? 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.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: May 28, 2019
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Yuma Kawakami, Daisuke Murakami, Masaaki Jindai, Keiji Kinoshita
  • Patent number: 10293411
    Abstract: A cutting tool according to one aspect of the present disclosure includes an attaching portion, a cutting portion having a core portion and a surface portion, and a joint portion. The attaching portion includes a hard component and a hard material. The hard component is at least one selected from the group consisting of TiC, TiCN, W, WC, Al2O3, and a combination of at least one of CBN and diamond and at least one of W and WC. The hard material includes one or two or more types of iron group elements, and has a Young's modulus of not more than 350 GPa. The core portion includes a cemented carbide material. The surface portion includes PCD or CBN. The cutting portion has a chamfer portion. The surface portion includes a groove, a flank face, and a cutting edge. The cutting edge extends toward the attaching portion.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: May 21, 2019
    Assignees: Sumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd.
    Inventors: Taisuke Higashi, Yusuke Matsuda, Satoru Kukino, Takashi Kanda, Katsumi Okamura
  • Patent number: 10286455
    Abstract: There is provided a throw-away tip which includes a blade containing diamond and is excellent in chip processability. The throw-away tip comprises a body and a blade provided to the body and having a cutting edge, the blade containing 80% by volume or more of diamond, the blade having a land surface extending along the cutting edge, and a chip breaker having a recess located opposite to the cutting edge with the land surface therebetween, the recess having a side surface having an inclined surface that recedes continuously as a distance thereof from the land surface increases in magnitude and that has a shape identical to that of a portion of a side surface of a shape of a body of revolution.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: May 14, 2019
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Yuji Tomoda, Yasuyuki Kanada, Kunishige Tanaka
  • Patent number: D848495
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: May 14, 2019
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Hideo Maeno, Yosuke Shimamoto, Naoki Matsuda
  • Patent number: D848496
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: May 14, 2019
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Atsuhiko Maeta, Kunishige Tanaka, Shota Takemura
  • Patent number: D850503
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: June 4, 2019
    Assignees: Sumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd.
    Inventors: Satoru Kukino, Shinya Imamura, Takashi Harada
  • Patent number: D854063
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: July 16, 2019
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Makoto Abe, Christoph Zeiner
  • Patent number: D854592
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: July 23, 2019
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventor: Naoki Matsuda
  • Patent number: D855091
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: July 30, 2019
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Makoto Abe, Christoph Zeiner
  • Patent number: D856387
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: August 13, 2019
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Machiko Abe, Hiroyuki Shimada, Kazuya Yano