Patents by Inventor Satoru Kukino

Satoru Kukino has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 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
  • 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
  • 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: 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
  • Publication number: 20200130061
    Abstract: A sintered material has 3 vol % to 80 vol % of cBN grains and a binder. The binder contains: one or more types selected from the group consisting of one or more types of compounds composed of one or more types of first elements selected from the group consisting of a group 4 element, a group 5 element and a group 6 element in the periodic table, Al and Si and one or more types of second elements selected from the group consisting of C, N, O and B, and a solid solution of these compounds; and one or more types of metallic elements selected from the group consisting of Li, Ca, Na, Sr, Ba and Be. The binder contains the one or more types of metallic elements in an amount of 0.001 mass % to 0.5 mass % or less in total, and oxygen in an amount of 0.1 mass % to 10.0 mass %.
    Type: Application
    Filed: July 26, 2018
    Publication date: April 30, 2020
    Applicants: Sumitomo Electric Industries, Ltd, SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Katsumi OKAMURA, Akito ISHII, Satoru KUKINO
  • Patent number: 10632542
    Abstract: A cutting tool according to an aspect of the present disclosure includes a cutting edge portion which contains at least one of cubic boron nitride and polycrystalline diamond. The cutting edge portion includes a flank face, a negative land contiguous to the flank face, and a cutting edge formed by a ridgeline between the flank face and the negative land. At least one of the negative land and the flank face is provided with a plurality of recesses and a projection. The projection is formed by arranging the edges of adjacent recesses in contact with each other.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: April 28, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Gaku Harada, Yoshinori Tanigawa, Satoru Kukino
  • Patent number: 10633292
    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: April 28, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Kazushi Takahama, Yusuke Matsuda, Satoru Kukino
  • Publication number: 20200102252
    Abstract: A composite sintered material includes a plurality of diamond grains, a plurality of cubic boron nitride grains, and a remainder of a binder phase, wherein the binder phase includes cobalt, a content of the cubic boron nitride grains in the composite sintered material is more than or equal to 3 volume % and less than or equal to 40 volume %, and an average length of line segments extending across continuous cubic boron nitride grains in appropriately specified straight lines extending through the composite sintered material is less than or equal to a length three times as large as an average grain size of the cubic boron nitride grains.
    Type: Application
    Filed: June 6, 2018
    Publication date: April 2, 2020
    Applicants: Sumitomo Electric Industries, Ltd., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Naoki WATANOBE, Takashi HARADA, Katsumi OKAMURA, Akito ISHII, Satoru KUKINO, Taisuke HIGASHI
  • Publication number: 20200055790
    Abstract: A surface-coated cutting tool including a substrate including a rake face and a flank face and a coating which covers a surface of the substrate is provided. The substrate is made of a cBN sintered material or a ceramic sintered material. The coating includes an alternating layer. The alternating layer is made by alternately stacking a first layer and a second layer different in composition from the first layer. The first layer contains Al, Cr, and N. The second layer contains Ti, Al, and N. A ratio T1/T2 between a thickness Ti of the first layer and a thickness T2 of the second layer is not lower than 0.1 and lower than 1. There are thirty or more interfaces at which the first layer and the second layer are in contact with each other.
    Type: Application
    Filed: September 20, 2017
    Publication date: February 20, 2020
    Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Makoto Setoyama, Nozomi Tsukihara, Yuki Tsutsumiuchi, Satoru Kukino, Yusuke Matsuda, Hironari Moroguchi
  • Patent number: 10532951
    Abstract: A sintered material includes a first material and a second material, the first material being partially stabilized ZrO2 having a crystal grain boundary or crystal grain in which 5 to 90 volume % of Al2O3 is dispersed with respect to a whole of the first material, the second material including at least one of SiAlON, silicon nitride and titanium nitride, the sintered material including 1 to 50 volume % of the first material.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: January 14, 2020
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kentaro Chihara, Satoru Kukino, Akito Ishii
  • Patent number: 10525538
    Abstract: A cutting tool includes a shaft portion and a plurality of edge region groups. The ridgeline between the first rake face portion and the first flank face portion constitutes a first cutting edge portion. The ridgeline between the second rake face portion and the second flank face portion constitutes a second cutting edge portion. As seen from the direction perpendicular to a plane tangent to the outer peripheral surface, in a state where the central axis overlaps a first end on the front end side of the first cutting edge portion, the inclination angle of the first cutting edge portion relative to the central axis is larger than the inclination angle of a straight line relative to the central axis, the straight line connecting the first end to a second end on the front end side of the second cutting edge portion.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: January 7, 2020
    Assignees: Sumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd.
    Inventors: Yusuke Matsuda, Taisuke Higashi, Satoru Kukino, Takashi Kanda
  • Patent number: 10501377
    Abstract: To provide a sintered material having excellent oxidation resistance, as well as excellent abrasion resistance and chipping resistance. A sintered material containing a first compound formed of Ti, Al, Si, O, and N is provided.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: December 10, 2019
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Hironari Moroguchi, Takashi Harada, Satoru Kukino
  • Publication number: 20190344359
    Abstract: A method for processing a workpiece by using a diamond tool comprising nano-polycrystalline diamond or vapor-phase synthesized single crystal diamond, the nano-polycrystalline diamond comprising 10 ppm or more and 1000 ppm or less of nitrogen atoms, the vapor-phase synthesized single crystal diamond comprising 1 ppm or more and 100 ppm or less of nitrogen atoms, in processing the workpiece, the diamond tool having a temperature of 400° C. or lower at a contact point of the workpiece and the diamond tool, a spatial region within a distance of 3 cm from the contact point having an oxygen concentration of 20% or less.
    Type: Application
    Filed: August 7, 2017
    Publication date: November 14, 2019
    Applicants: SUMITOMO ELECTRIC HARDMETAL CORP., Sumitomo Electric Industries, Ltd.
    Inventors: Akihiko UEDA, Machiko ABE, Yutaka KOBAYASHI, Satoru KUKINO, Takashi HARADA
  • Publication number: 20190276922
    Abstract: A method for manufacturing a member according to one embodiment of the present disclosure is a method for manufacturing a member having a substrate and a sprayed coating formed on a surface of the substrate. The method includes: supplying an oil into a recessed portion of the sprayed coating, a kinematic viscosity of the oil at 40° C. being more than or equal to 3 mm2/s and less than or equal to 43 mm2/s; and dry-cutting, using a cutting tool, a surface of the sprayed coating with the recessed portion supplied with the oil. A supplied amount of the oil is more than or equal to 0.1 weight % and less than or equal to 2.7 weight % with respect to an apparent weight of the sprayed coating.
    Type: Application
    Filed: December 19, 2017
    Publication date: September 12, 2019
    Applicants: SUMITOMO ELECTRIC HARDMETAL CORP., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Kazushi Takahama, Satoru Kukino
  • Publication number: 20190271062
    Abstract: A composite sintered material includes: a plurality of diamond grains having an average grain size of less than or equal to 10 ?m; a plurality of cubic boron nitride grains having an average grain size of less than or equal to 2 ?m; and a remainder of a binder phase, wherein at least parts of adjacent diamond grains are bound to one another, the binder phase includes cobalt, in the composite sintered material, a content of the diamond grains is more than or equal to 30 volume % and less than or equal to 94 volume %, a content of the cubic boron nitride grains is more than or equal to 3 volume % and less than or equal to 40 volume %, and a content of the cobalt is more than or equal to 3 volume % and less than or equal to 30 volume %.
    Type: Application
    Filed: October 10, 2017
    Publication date: September 5, 2019
    Applicants: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Katsumi Okamura, Naoki Watanobe, Akito Ishii, Takashi Harada, Satoru Kukino, Taisuke Higashi
  • Publication number: 20190247927
    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: Application
    Filed: December 14, 2017
    Publication date: August 15, 2019
    Inventors: Katsumi Okamura, Satoru Kukino, Makoto Setoyama
  • Publication number: 20190202745
    Abstract: A ceramic powder containing at least one of a nitride and a carbonitride of a metal element as a major component, the metal element being one or more elements selected from the group consisting of a group 4 element, a group 5 element and a group 6 element, the ceramic powder having particles having an average particle size of 5 ?m or less, and an oxygen content of 0.3% by mass or less.
    Type: Application
    Filed: March 8, 2019
    Publication date: July 4, 2019
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi Harada, Satoru Kukino
  • Publication number: 20190184469
    Abstract: A cutting tool shim is to be disposed between a cutting insert and a holder and to be fixed to the holder. The ridgeline between the flank face and the rake face forms a cutting edge. The cutting edge includes an arc-shaped portion. A coolant supply path for jetting coolant to the arc-shaped portion is provided in the cutting tool shim, the coolant being supplied from the holder. The coolant supply path includes a lead-in port for leading the coolant from the holder to the coolant supply path, and a jetting port for arc-shaped portion for jetting the coolant to the arc-shaped portion. The jetting port for arc-shaped portion has a curved shape along the arc-shaped portion. The distance between the jetting port for arc-shaped portion and the arc-shaped portion is not less than 2.2 mm and not more than 8.1 mm.
    Type: Application
    Filed: July 31, 2017
    Publication date: June 20, 2019
    Inventors: Tsutomu Hirano, Satoru Kukino, Tomoyuki Fukuyama, Takuma Kishimoto