Patents Assigned to Sumitomo Electric Hardmetal Corp.
  • Cutting tool
    Patent number: 11376668
    Abstract: A cutting tool includes: a rake face; a flank face continuous to the rake face; and a cutting edge formed by a ridgeline between the rake face and the flank face. The cutting tool includes: a base material having a first face on a side of the rake face and a second face on a side of the flank face; and a diamond layer covering the first face and the second face. The first face includes: a first top face continuous to the second face; and a second top face continuous to the first top face and disposed such that the first top face is sandwiched between the second top face and the second face. An angle formed between the first top face and the second top face is a negative angle in a cross section perpendicular to the cutting edge.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: July 5, 2022
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Yutaka Kobayashi, Katsuo Kazahaya
  • CUTTING INSERT FOR ROTARY CUTTING TOOL, AND ROTARY CUTTING TOOL
    Publication number: 20220203459
    Abstract: A cutting insert for a rotary cutting tool has a second surface that includes a second seating surface having a shape of a flat surface. The first cutting edge has a first main cutting edge portion and a first sub cutting edge portion. The second cutting edge has a second main cutting edge portion and a second sub cutting edge portion. When viewed in a direction from the first surface toward the second surface, at least a portion of the second sub cutting edge portion is located outside the first main cutting edge portion, and at least a portion of the first sub cutting edge portion is located outside the second main cutting edge portion. When viewed in the direction from the first surface toward the second surface, each of the first sub cutting edge portion and the second sub cutting edge portion has a shape of a curved line.
    Type: Application
    Filed: December 24, 2020
    Publication date: June 30, 2022
    Applicant: Sumitomo Electric Hardmetal Corp.
    Inventor: Shota TSUJIMOTO
  • Surface coated cutting tool and method for manufacturing the same
    Patent number: 11370033
    Abstract: A surface coated cutting tool comprises a base material and a coating layer that coats the base material, the coating layer including an alternate layer composed of a first unit layer and a second unit layer alternately stacked, the first unit layer being composed of a nitride containing aluminum and zirconium, in the first unit layer, when the total number of metal atoms constituting the first unit layer is represented as 1, a ratio thereto of the number of atoms of the zirconium being not less than 0.65 and not more than 0.95, the second unit layer being composed of a nitride containing titanium and silicon, in the second unit layer, when the total number of metal atoms constituting the second unit layer is represented as 1, a ratio thereto of the number of atoms of the silicon being larger than 0 and not more than 0.20.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: June 28, 2022
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Haruyo Fukui, Makoto Setoyama, Keizo Tanaka, Kouhei Yoshimura
  • CEMENTED CARBIDE AND CUTTING TOOL CONTAINING THE SAME AS SUBSTRATE
    Publication number: 20220195566
    Abstract: Cemented carbide contains a first hard phase and a binder phase. The first hard phase is composed of tungsten carbide particles. The binder phase is composed of cobalt, nickel, iron, and copper as constituent elements. An average content of each of the constituent elements is not lower than 10 atomic % and not higher than 30 atomic %. Cemented carbide contains no second hard phase, or a content of the second hard phase is equal to or lower than 2 mass % of a total amount of cemented carbide. The second hard phase is composed of a compound containing at least one type of a metal element selected from the group consisting of a group-IV element, a group-V element, and a group-VI element in a periodic table except for tungsten and at least one type of an element selected from the group consisting of carbon, nitrogen, and oxygen.
    Type: Application
    Filed: December 23, 2020
    Publication date: June 23, 2022
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Takato YAMANISHI, Shinya IMAMURA
  • CUTTING TOOL
    Publication number: 20220193787
    Abstract: A cutting tool including a rake face and a flank face includes: a substrate; and a coating film disposed on the substrate, wherein the coating film includes an Al2O3 layer, residual stress of the Al2O3 layer has a minimum value Rmin at at least a portion of a region d1 of the rake face, the minimum value Rmin is more than ?0.27 GPa and less than or equal to ?0.1 GPa.
    Type: Application
    Filed: May 18, 2020
    Publication date: June 23, 2022
    Applicant: Sumitomo Electric Hardmetal Corp.
    Inventors: Fumiyoshi KOBAYASHI, Susumu OKUNO, Anongsack PASEUTH, Shinya IMAMURA
  • Cutting tool
    Patent number: 11358226
    Abstract: A cutting tool comprises a substrate and a coating layer provided on the substrate, the coating layer including a multilayer structure layer composed of a first unit layer and a second unit layer, and a lone layer, the lone layer including cubic TizAl1-zN crystal grains, an atomic ratio z of Ti in the TizAl1-zN being 0.55 or more and 0.7 or less, the lone layer having a thickness with an average value of 2.5 nm or more and 10 nm or less, the multilayer structure layer having a thickness with an average value of 40 nm or more and 95 nm or less, one multilayer structure layer and one lone layer forming a repetitive unit having a thickness with an average value of 50 nm to 100 nm, a maximum value of 90 nm to 110 nm, and a minimum value of 40 nm to 60 nm.
    Type: Grant
    Filed: June 22, 2020
    Date of Patent: June 14, 2022
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Yasuki Kido, Anongsack Paseuth, Susumu Okuno
  • Cubic boron nitride sintered material
    Patent number: 11352298
    Abstract: A cubic boron nitride sintered material includes: more than 80 volume % and less than 100 volume % of cubic boron nitride grains; and more than 0 volume % and less than 20 volume % of a binder phase. The binder phase includes: at least one selected from a group consisting of a simple substance, an alloy, and an intermetallic compound selected from a group consisting of a group 4 element, a group 5 element, a group 6 element in a periodic table, aluminum, silicon, cobalt, and nickel. A dislocation density of the cubic boron nitride grains is more than or equal to 1×1015/m2 and less than or equal to 1×1017/m2.
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: June 7, 2022
    Assignees: Sumitomo Electric Industries, Ltd., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Akito Ishii, Katsumi Okamura, Hironari Moroguchi, Satoru Kukino
  • CUTTING INSERT
    Publication number: 20220168820
    Abstract: A cutting insert is mountable on a body. The cutting insert includes: a top surface; a bottom surface opposite to the top surface; a side surface contiguous to the top surface and the bottom surface; and a cutting edge formed at a ridgeline between the top surface and the side surface. The side surface has a first surface disposed adjacent to the cutting edge and a second surface contiguous to the first surface. When viewed in a cross sectional view parallel to the bottom surface, the second surface has a first position and a second position that are brought into abutment with the body when mounted on the body. Between the first position and the second position, an imaginary straight line extending through the first position and the second position is separated from the second surface.
    Type: Application
    Filed: March 24, 2020
    Publication date: June 2, 2022
    Applicant: Sumitomo Electric Hardmetal Corp.
    Inventors: Kouki MATSUBARA, Tomoyuki FUKUYAMA, Shota TAKEMURA, Shota TSUJIMOTO, Naoki MATSUDA
  • CUTTING INSERT
    Publication number: 20220168825
    Abstract: A cutting insert of the present disclosure includes a top surface, a bottom surface, a side surface, and a corner cutting edge, a first cutting edge, a second cutting edge and a third cutting edge formed at a ridge line formed by the side surface and the top surface. The corner cutting edge has a first end and a second end. The first cutting edge extends from the first end in a first direction. The second cutting edge extends from the second end in a second direction. The third cutting edge extends from the second cutting edge in a third direction. The top surface has a first rake face adjacent to the first cutting edge, a second rake face adjacent to the second cutting edge, and a third rake face adjacent to the third cutting edge.
    Type: Application
    Filed: March 13, 2020
    Publication date: June 2, 2022
    Applicant: Sumitomo Electric Hardmetal Corp.
    Inventors: Kouki MATSUBARA, Shota TAKEMURA, Tomoyuki FUKUYAMA, Shota TSUJIMOTO, Naoki MATSUDA
  • CUTTING TOOL
    Publication number: 20220168819
    Abstract: A cutting tool including a rake face and a flank face includes: a substrate; and a coating film disposed on the substrate, wherein the coating film includes an Al2O3 layer, residual stress of the Al2O3 layer has a minimum value Rmin at at least a portion of a region f1 in the flank face, the minimum value Rmin is more than or equal to ?0.25 GPa and less than or equal to ?0.1 GPa.
    Type: Application
    Filed: May 18, 2020
    Publication date: June 2, 2022
    Applicant: Sumitomo Electric Hardmetal Corp.
    Inventors: Fumiyoshi KOBAYASHI, Susumu OKUNO, Anongsack PASEUTH, Shinya IMAMURA
  • Cutting tool holder
    Patent number: 11344953
    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: Grant
    Filed: May 23, 2018
    Date of Patent: May 31, 2022
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Tsutomu Hirano, Satoru Kukino, Yosuke Shimamoto
  • CUTTING INSERT
    Publication number: 20220161334
    Abstract: A ridgeline between the top surface and the side surface includes: a nose cutting edge portion having a curved line shape, the nose cutting edge portion having a first end and a second end opposite to the first end; a major cutting edge portion contiguous to the first end; and a wiper cutting edge portion contiguous to the second end. The top surface includes: a first rake face contiguous to the wiper cutting edge portion; a second rake face contiguous to the major cutting edge portion; and a third rake face contiguous to the nose cutting edge portion and contiguous to each of the first rake face and the second rake face. A boundary line between the second rake face and the third rake face is separated from the first end and is contiguous to the major cutting edge portion.
    Type: Application
    Filed: March 24, 2020
    Publication date: May 26, 2022
    Applicant: Sumitomo Electric Hardmetal Corp.
    Inventors: Kouki MATSUBARA, Tomoyuki FUKUYAMA, Shota TAKEMURA, Shota TSUJIMOTO, Naoki MATSUDA
  • Cutting insert
    Patent number: 11338371
    Abstract: A cutting insert has a surface that relates to cutting, the surface comprising cBN sintered material, ceramics, or cermet. The cutting insert comprises: a rake face; a flank face; a chamfer located between the rake face and the flank face; and a cutting edge formed by a ridgeline at which the flank face and the chamfer intersect. The cutting edge comprises a cutting edge portion for push cutting, a cutting edge portion for pull cutting, and a connecting cutting edge portion located between the cutting edge portion for push cutting and the cutting edge portion for pull cutting. In the chamfer located along the cutting edge, the chamfer located along the connecting cutting edge portion has a minimum width.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: May 24, 2022
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Hironari Moroguchi, Satoru Kukino
  • Cutting tool and method for manufacturing the same
    Patent number: 11338370
    Abstract: A cutting tool includes a base material, and a coating film covering the base material in contact with the base material. The base material is a cubic boron nitride sintered material. The coating film is a ceramic. An amount of oxygen in the coating film is less than or equal to 0.040 mass percent.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: May 24, 2022
    Assignees: Sumitomo Electric Industries, Ltd., Sumitomo Electric Hardmetal Corp.
    Inventors: Katsumi Okamura, Satoru Kukino, Makoto Setoyama
  • CUTTING TOOL BODY, CUTTING INSERT, AND CUTTING TOOL
    Publication number: 20220152713
    Abstract: The first seating surface is contiguous to each of the front end surface and the outer circumferential surface. The second seating surface is contiguous to the front end surface. The cutting tool body is provided with a recess contiguous to each of the first seating surface, the second seating surface, and the front end surface. When the front end surface is viewed in a direction from the front end surface toward the rear end surface, a length of the recess in a direction perpendicular to a straight line parallel to the central axis and extending along the first seating surface is equal to or longer than three times as long as a length of the recess in a direction perpendicular to the first seating surface and passing through a contact point of the second seating surface, the recess, and the front end surface.
    Type: Application
    Filed: March 25, 2020
    Publication date: May 19, 2022
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Kouki MATSUBARA, Tomoyuki FUKUYAMA, Shota TAKEMURA, Shota TSUJIMOTO, Naoki MATSUDA
  • Cemented carbide and cutting tool
    Patent number: 11332810
    Abstract: A cemented carbide comprises a first hard phase comprising tungsten carbide particles and a binder phase including Co and Cr. 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, with the surfaces facing each other along a length L of 100 nm or more, is referred to as a WC/WC interface, and a ratio C(R)/C(C) has an average value of 0.17 or more, where C(R) and C(C) represent peak values of atomic percentages of Cr and Co, respectively, at a WC/WC interface having a 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+2 at %.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: May 17, 2022
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Yasuki Kido, Daiji Tabayashi, Shinya Imamura
  • Surface-coated cutting tool and method for manufacturing same
    Patent number: 11326252
    Abstract: A surface-coated cutting tool includes a substrate and a coating film that coats the substrate, wherein the coating film includes a hard coating layer constituted of a domain region and a matrix region, the domain region is a region having a plurality of portions divided and distributed in the matrix region, the domain region has a structure in which a first layer composed of a first Alx1Ti(1-x1) compound and a second layer composed of a second Alx2Ti(1-x2) compound are layered on each other, the matrix region has a structure in which a third layer composed of a third Alx3Ti(1-x3) compound and a fourth layer composed of a fourth Alx4Ti(1-x4) compound are layered on each other.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: May 10, 2022
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Yasuki Kido, Anongsack Paseuth, Susumu Okuno, Shinya Imamura
  • Composite sintered material and tool using same
    Patent number: 11319255
    Abstract: A composite sintered material includes: cubic boron nitride grains; and hexagonal boron nitride grains or the hexagonal boron nitride grains and wurtzite type boron nitride grains, wherein a dislocation density of the cubic boron nitride grains is more than or equal to 1×1015/m2 and less than or equal to 1×1017/m2, a median diameter d50 of equivalent circle diameters of the cubic boron nitride grains is more than or equal to 10 nm and less than or equal to 500 nm, and a relationship of the following expression 1 is satisfied: 0.015?(Vh+Vw)/(Vc+Vh+Vw)?0.5,??Expression 1: where Vc represents a volume-based content ratio of the cubic boron nitride grains, Vh represents a volume-based content ratio of the hexagonal boron nitride grains, and Vw represents a volume-based content ratio of the wurtzite type boron nitride grains.
    Type: Grant
    Filed: March 18, 2020
    Date of Patent: May 3, 2022
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Yuh Ishida, Satoru Kukino, Michiko Matsukawa
  • Surface-coated cutting tool and method for manufacturing same
    Patent number: 11311945
    Abstract: A surface-coated cutting tool includes a substrate and a coating film that coats the substrate, wherein the coating film includes a hard coating layer constituted of a domain region and a matrix region, the domain region is a region having a plurality of portions divided and distributed in the matrix region, the domain region has a structure in which a first layer composed of a first Alx1Ti(1-x1) compound and a second layer composed of a second Alx2Ti(1-x2) compound are layered on each other, the matrix region has a structure in which a third layer composed of a third Alx3Ti(1-x3) compound and a fourth layer composed of a fourth Alx4Ti(1-x4) compound are layered on each other, the first AlTi compound and the third AlTi compound have a hexagonal crystal structure, the second AlTi compound and the fourth AlTi compound have a cubic crystal structure.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: April 26, 2022
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Anongsack Paseuth, Yasuki Kido, Susumu Okuno, Shinya Imamura
  • Cutting tool
    Patent number: D954116
    Type: Grant
    Filed: December 23, 2020
    Date of Patent: June 7, 2022
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Shota Tsujimoto, Kouki Matsubara, Katsuya Nakakihara, Naoki Matsuda, Tomoyuki Fukuyama