Patents Assigned to Sumitomo Electric Hardmetal Corp.
  • Patent number: 10807173
    Abstract: A second distance is longer than a first distance and a value obtained by dividing the third distance by the fourth distance is more than or equal to 0.5 and less than or equal to 0.8 when it is assumed that the first distance represents a distance between the cutting edge and the mounting surface in a direction perpendicular to the rake face, the second distance represents a distance between the mounting surface and a boundary portion between the rising portion and the flat portion in the direction perpendicular to the rake face, the third distance represents a distance between the boundary portion and a tip of the cutting edge in a direction parallel to the rake face, and the fourth distance represents a distance between the second discharging opening portion and the tip of the cutting edge in the direction parallel to the rake face.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: October 20, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Keiji Kinoshita, Kouki Matsubara, Yusuke Koike
  • Publication number: 20200316691
    Abstract: A turning tool includes: a holder portion; and a cutting edge portion fixed to the holder portion, wherein the cutting edge portion is composed of a synthetic single-crystal diamond, and the cutting edge portion has a nose curvature having a curvature radius of more than or equal to 0.1 mm and less than or equal to 1.2 mm, and the nose curvature satisfies at least one of a condition that a direction of a line of intersection between the rake face and a bisecting cross section of a vertex angle of the nose curvature is within ±10° relative to a <110> direction of the synthetic single-crystal diamond, and a condition that the direction of the line of intersection between the rake face and the bisecting cross section of the vertex angle of the nose curvature is within ±10° relative to a <100> direction of the synthetic single-crystal diamond.
    Type: Application
    Filed: August 2, 2019
    Publication date: October 8, 2020
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Akihiko UEDA, Takuya NOHARA, Yutaka KOBAYASHI
  • Publication number: 20200298317
    Abstract: A surface-coated cutting tool includes a base material and a coating covering the base material. The base material includes a rake face and a flank face. The coating includes a TiCN layer. The TiCN layer has a (311) orientation in a region d1 in the rake face. The TiCN layer has a (422) orientation in a region d2 in the flank face.
    Type: Application
    Filed: December 14, 2018
    Publication date: September 24, 2020
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Satoshi Ono, Shinya Imamura, Susumu Okuno, Anongsack Paseuth
  • Publication number: 20200291504
    Abstract: A cemented carbide includes second hard phase grains, wherein the second hard phase grains includes a core portion, and in a case where a total of 70 unit regions that are each constituted of a square having each side of 8?m are provided by successively arranging 7 unit regions in a longitudinal direction and 10 unit regions in a lateral direction in an electron microscope image of any cross section of the cemented carbide captured at a magnification of 1500×, where the total number of core portions in the total of 70 unit regions is calculated, and where a percentage of the number of core portions in each of the unit regions with respect to the total number of core portions is calculated, the number of unit regions in which the percentage is less than 0.43% or more than 2.43% is less than or equal to 10.
    Type: Application
    Filed: August 8, 2019
    Publication date: September 17, 2020
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Kosuke FUKAE, Yasuki KIDO, Masami WATANABE, Shinya IMAMURA
  • Patent number: 10774442
    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: Grant
    Filed: March 20, 2019
    Date of Patent: September 15, 2020
    Assignees: Sumitomo Electric Industries, Ltd., Sumitomo Electric Hardmetal Corp.
    Inventors: Yoshiki Nishibayashi, Natsuo Tatsumi, Hitoshi Sumiya, Akihiko Ueda, Yutaka Kobayashi
  • Patent number: 10766077
    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: Grant
    Filed: February 27, 2017
    Date of Patent: September 8, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Yoshikatsu Mori, Kouki Matsubara, Ryusei Hamada, Masaaki Jindai, Kazuhiko Kashima, Yasuhiro Kajiwara
  • Publication number: 20200269325
    Abstract: A cutting tool includes a body, a first cutting insert, a second cutting insert, and a third cutting insert. The body has a front end surface and an outer circumferential surface. The first cutting insert is attached to a first pocket. The second cutting insert is attached to a second pocket. The third cutting insert is attached to a third pocket. The first pocket has a first seat surface, a second seat surface, a third seat surface, and a first swarf discharging groove. The second pocket has a fourth seat surface, a fifth seat surface, a sixth seat surface, and a second swarf discharging groove. The third pocket has a seventh seat surface, an eighth seat surface, a ninth seat surface, and a third swarf discharging groove. In a cross section perpendicular to an axis, an angle formed between a straight line along the sixth seat surface and a tangent of the second swarf discharging groove at a boundary between the outer circumferential surface and the second swarf discharging groove is more than 90°.
    Type: Application
    Filed: September 4, 2019
    Publication date: August 27, 2020
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Tangwei ZHAO, Tomoyuki FUKUYAMA
  • Patent number: 10745783
    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: Grant
    Filed: July 2, 2018
    Date of Patent: August 18, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Yasuki Kido, Daiji Tabayashi, Shinya Imamura
  • Patent number: 10737943
    Abstract: Provided is a method for manufacturing a single-crystal diamond, the method including the steps of: forming a protective film on at least a part of a surface of an auxiliary plate; preparing a diamond seed crystal substrate; disposing an auxiliary plate with a protective film that has the protective film formed on the auxiliary plate, and a diamond seed crystal substrate in a chamber; and growing a single-crystal diamond on a principal surface of the diamond seed crystal substrate by a chemical vapor deposition method while introducing a carbon-containing gas into the chamber.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: August 11, 2020
    Assignees: Sumitomo Electric Industries, Ltd., Sumitomo Electric Hardmetal Corp.
    Inventors: Takuya Nohara, Natsuo Tatsumi, Yoshiki Nishibayashi, Hitoshi Sumiya, Yutaka Kobayashi, Akihiko Ueda
  • Publication number: 20200247673
    Abstract: The polycrystalline cubic boron nitride contains a cubic boron nitride at a content greater than or equal to 98.5% by volume, and has an area rate S1 of crystal grains, the crystal grains having an equivalent circle diameter greater than or equal to 1 ?m, less than or equal to 20 area % at a cross section of the polycrystalline cubic boron nitride as observed with a scanning electron microscope at a magnification of 10,000.
    Type: Application
    Filed: June 18, 2019
    Publication date: August 6, 2020
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Tsutomu HIRANO, Satoru KUKINO
  • Publication number: 20200230710
    Abstract: A cutting tool holder according to one embodiment supports a cutting insert including a rake face, a flank face, and a cutting edge. The cutting tool holder according to one embodiment includes: a holder body having a seat face on which the cutting insert is placed; a pressing member that positions and fixes the cutting insert to the holder body; and a fixing member that fixes the pressing member to the holder body. The pressing member has: a front end portion close to the cutting edge; and a base end portion distant away from the cutting edge. The front end portion is provided with a first coolant ejection hole. A first flow path is provided inside the holder body. A coolant reservoir and a second flow path are provided inside the pressing member.
    Type: Application
    Filed: May 23, 2018
    Publication date: July 23, 2020
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Tsutomu HIRANO, Satoru KUKINO, Yosuke SHIMAMOTO
  • Patent number: 10717134
    Abstract: A cutting tool according to an aspect of the present disclosure includes a shank, a joint, and a cutting portion attached through the joint to the shank. The cutting portion includes a core and a surface portion. The surface portion is disposed around a central axis of the cutting portion to cover an outer circumferential surface of the core. The surface portion includes a cutting edge. The cutting edge is disposed on an outer circumferential surface of the surface portion and formed in a helical shape about the central axis. The surface portion is a composite sintered material including a hard phase formed of a plurality of diamond particles and a plurality of cubic boron nitride particles, and a binder phase forming the remainder.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: July 21, 2020
    Assignees: Sumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd.
    Inventors: Yusuke Matsuda, Taisuke Higashi, Satoru Kukino, Takashi Kanda, Katsumi Okamura
  • Patent number: 10717136
    Abstract: The edge portion includes an upper surface, a side surface, and a land surface. The side surface has a front side surface and a pair of lateral side surfaces. An intersection between the land surface and the front side surface forms a front cutting edge. An intersection between the land surface and each of the pair of lateral side surfaces form a corresponding one of a pair of lateral cutting edges. The edge portion contains 80 vol % or more of diamond. A chip breaker recess is provided between the upper surface and the land surface. The surfaces forming the chip breaker recess include a rake face and a breaker wall surface. The upper surface has a front edge portion opposite to the front cutting edge from the chip breaker recess. A pair of protruding portions are provided to extend from the front edge portion toward the front cutting edge.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: July 21, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Kouji Shimanuki, Gaku Harada, Yasuyuki Kanada
  • Patent number: D890233
    Type: Grant
    Filed: July 26, 2018
    Date of Patent: July 14, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Hideo Maeno, Yosuke Shimamoto, Takahiro Okuno, Naoki Matsuda
  • Patent number: D890234
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: July 14, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Hideo Maeno, Yosuke Shimamoto, Takahiro Okuno, Naoki Matsuda
  • Patent number: D890235
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: July 14, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Hideo Maeno, Yosuke Shimamoto, Takahiro Okuno, Naoki Matsuda
  • Patent number: D890827
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: July 21, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Hideo Maeno, Yosuke Shimamoto, Takahiro Okuno, Naoki Matsuda
  • Patent number: D891490
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: July 28, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Hideo Maeno, Yosuke Shimamoto, Takahiro Okuno, Naoki Matsuda
  • Patent number: D892876
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: August 11, 2020
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Kouki Matsubara, Shota Takemura, Naoki Matsuda
  • Patent number: D894978
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: September 1, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Shuhei Misumi, Minoru Yoshida, Yoshiji Sato