Patents Assigned to Sumitomo Electric Hardmetal Corp.
  • 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: 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: 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
  • Publication number: 20200215625
    Abstract: A cutting insert includes a main body including a first face, a second face, and a third face. The second face includes a rake face. Among the outer-peripheral sides of the second face, the boundary portion with the first face is a main cutting edge. When viewed from the side where the first face is disposed, the main cutting edge includes a first straight portion, a second straight portion, and a curved portion. The first straight portion is located adjacent to a reference side. The second straight portion is arranged at a distance from the first straight portion. The curved portion connects the first straight portion and the second straight portion. A first intersection angle of the first straight portion with respect to the reference side is different from a second intersection angle of the second straight portion with respect to the reference side.
    Type: Application
    Filed: March 17, 2020
    Publication date: July 9, 2020
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventor: Yuta Morisaki
  • Publication number: 20200216974
    Abstract: A single-crystal diamond includes n types of regions different in total concentration of an impurity, the n types of regions being observed in an observed surface being in parallel to a (110) face. Each of the n types of regions has an area not smaller than 0.1 ?m2. At least one of a first line, a second line, and a third line on the observed surface crosses a boundary between the n types of regions at least four times. The first line, the second line, and the third line are in parallel to a <?110> direction and have a length of 1 mm. A midpoint of the first line corresponds to the center of gravity of the observed surface. The second line and the third line are distant from the first line by 300 ?m in a <001> direction and a <00?1> direction, respectively.
    Type: Application
    Filed: September 14, 2018
    Publication date: July 9, 2020
    Applicants: Sumitomo Electric Industries, Ltd., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Natsuo TATSUMI, Yoshiki NISHIBAYASHI, Takuya NOHARA, Akihiko UEDA, Yutaka KOBAYASHI
  • Publication number: 20200215618
    Abstract: A cutting insert according to one embodiment includes: a rake face; a flank face continuous to the rake face; and a cutting edge constituted of a ridgeline between the rake face and the flank face. A coolant flow path is provided inside the cutting insert. One end portion of the coolant flow path opens in the flank face to form a coolant ejection hole. The flank face is provided with a coolant guide groove extending from the coolant ejection hole toward the cutting edge with a base end portion of the coolant guide groove being connected to the coolant ejection hole and with a front end portion of the coolant guide groove being disposed at a position close to the cutting edge relative to the base end portion.
    Type: Application
    Filed: May 18, 2018
    Publication date: July 9, 2020
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Tsutomu HIRANO, Satoru KUKINO
  • Publication number: 20200215620
    Abstract: A diamond-coated tool includes: a substrate; and a diamond layer that coats the substrate, wherein the diamond layer includes a first region that is in contact with the substrate, the first region includes a region S1 surrounded by an interface P between the substrate and the diamond layer and an imaginary plane V1 separated from the interface P by a distance of 2 ?m, and the region S1 has crystal grains grown in random directions.
    Type: Application
    Filed: May 9, 2019
    Publication date: July 9, 2020
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Nozomi TSUKIHARA, Rintaro SUGIMOTO, Yutaka KOBAYASHI
  • Publication number: 20200215664
    Abstract: A dresser includes: a mount component; and a cutting edge component inserted in the mount component at a base end portion side, wherein the portion of the cutting edge component inserted in the mount component has one or more portions in each of which an area of a cross section is increased from the front end portion side toward the base end portion side in the insertion direction, and a ratio L1/M1 of a length L1 and a maximum value M1 is more than or equal to 2.1, where L1 represents a length of the portion of the cutting edge component inserted in the mount component and M1 represents a maximum value of a diameter of a circle having an area equal to the area of the cross section of the portion of the cutting edge component inserted in the mount component.
    Type: Application
    Filed: March 27, 2019
    Publication date: July 9, 2020
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Takeshi SATO, Tadashi YAMAGUCHI, Shinichiro YURUGI
  • Patent number: 10702926
    Abstract: A rotary cutting blade material has an attaching structure forming portion that is to serve as an attaching portion to the shank, a cutting structure forming portion that is to serve as a cutting blade, and a joint portion. The cutting structure forming portion has a core portion and a surface portion provided on the attaching structure forming portion with the joint portion being interposed, and the surface portion covers at least a part of a surface of the core portion. The attaching structure forming portion includes a hard material including a hard component and one or two or more types of iron group elements, and the hard material has a Young's modulus of not more than 350 GPa. The core portion includes a cemented carbide material, and the surface portion includes PCD or CBN.
    Type: Grant
    Filed: August 10, 2017
    Date of Patent: July 7, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Taisuke Higashi, Satoru Kukino
  • Patent number: 10697088
    Abstract: A single-crystal diamond material has a transmittance of light with a wavelength of greater than or equal to 410 nm and less than or equal to 750 nm of less than or equal to 15% for any wavelength, and is at least either of an electrical insulator according to optical evaluation and an electrical insulator according to electrical evaluation. A criterion of the optical evaluation can be a transmittance of light with a wavelength of 10.6 ?m of greater than or equal to 1%. A criterion of the electrical evaluation can be an average resistivity of greater than or equal to 1×106 ?cm. Accordingly, a single-crystal diamond material having a low transmittance of light in the entire region of the visible light region and exhibiting a black color is provided.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: June 30, 2020
    Assignees: Sumitomo Electric Industries, Ltd., Sumitomo Electric Hardmetal Corp.
    Inventors: Yoshiki Nishibayashi, Akihiko Ueda, Yutaka Kobayashi
  • Patent number: 10676398
    Abstract: A sintered material includes cubic boron nitride grains and a binder, a grain size D50 of the cubic boron nitride grains when a cumulative value of the cubic boron nitride grains is 50% in an area-based grain size distribution being more than 0.5 ?m and less than or equal to 5 ?m, more than or equal to 70 volume % and less than or equal to 98 volume % of the cubic boron nitride grains being included in the sintered material, the binder being composed of A1-xCrxN, where 0?x?1, and a remainder, the remainder being composed of at least one of a first element and a compound including the first element and a second element, the first element being one or more elements selected from a group consisting of W, Co, Ni, Mo, Al, and Cr, the second element being one or more elements selected from a group consisting of nitrogen, carbon, oxygen, and boron.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: June 9, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Kazushi Takahama, Yusuke Matsuda, Satoru Kukino
  • Patent number: 10654181
    Abstract: A surface-coated cutting tool includes a base material and a coating formed on the base material. The coating includes an ?-Al2O3 layer. The ?-Al2O3 layer contains a plurality of ?-Al2O3 crystal grains and chlorine, and has a TC(006) of more than 5 in texture coefficient TC(hkl). The ?-Al2O3 layer includes lower and upper layers, the lower layer is located closer to the base material than the upper layer is, and the upper layer is located opposite to the base material across the lower layer, in a thickness direction of the ?-Al2O3 layer. The lower layer has a thickness of 1.0 ?m. The upper layer has a thickness of 0.5 ?m or more. The chlorine in the lower layer has a concentration distribution in which an atomic concentration CCl of the chlorine decreases in a direction away from the base material, in a thickness direction of the lower layer.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: May 19, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Kouhei Yoshimura, Shinya Imamura, Hideaki Kanaoka, Anongsack Paseuth, Satoshi Ono
  • Patent number: D888786
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: June 30, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Machiko Abe, Hiroyuki Shimada, Kazuya Yano
  • 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