Patents Assigned to Sumitomo Electric Hardmetal Corp.
  • Patent number: 10646934
    Abstract: The negative land includes: a first region in which a space between the upper cutting edge and the lower cutting edge becomes wider toward the outer circumferential surface; and a second region which is continuous to the first region and in which the space becomes wider toward the rotation axis. In a cross section perpendicular to the rotation axis, the rake face includes a return face continuous to the outer circumferential surface, the return face being recessed opposite to a rotation direction of the drill. When a first boundary represents a boundary between the outer circumferential surface and the first region and a second boundary represents a boundary between the first region and the second region, a length of the first boundary is larger than a length of the second boundary in a direction parallel to the rotation axis. The second boundary is continuous to the return face.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: May 12, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Yuki Tsutsumi, Masaaki Jindai, Hirofumi Tamanishi
  • Patent number: 10639725
    Abstract: A composite diamond body includes a diamond base material and a stable layer disposed on the diamond base material. The stable layer may have a thickness of 0.001 ?m or more and less than 10 ?m, and may include a plurality of layers. A composite diamond tool includes the composite diamond body. There are thus provided highly wear-resistant composite diamond body and composite diamond tool that are even applicable to mirror-finish planarization of a workpiece which reacts with diamond to cause the diamond to wear.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: May 5, 2020
    Assignees: Sumitomo Electric Industries, Ltd., Sumitomo Electric Hardmetal Corp.
    Inventors: Yoshiki Nishibayashi, Akihiko Ueda, Yutaka Kobayashi
  • 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: 10632547
    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: Grant
    Filed: March 1, 2017
    Date of Patent: April 28, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventor: Yuta Morisaki
  • Patent number: 10632541
    Abstract: A rotary cutting tool insert according to one embodiment of the present invention includes: an annular rake face provided with at least one recess portion; and a cutting edge formed at an outer circumference of the rake face, the recess portion having a width of more than or equal to 1.2 mm and less than or equal to 3.0 mm in a circumferential direction of the rake face, a distance between the cutting edge and an end of the recess portion at the outer circumference side of the rake face being more than or equal to 0.1 mm and less than or equal to 0.5 mm. According to the rotary cutting tool insert according to the one embodiment of the present invention, roughness of a processed surface and vibration due to a cutting process can be prevented.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: April 28, 2020
    Assignees: Sumitomo Electric Hardmetal Corp., DMG Mori Co., Ltd.
    Inventors: Shinya Ikenaga, Junya Okida, Morihiro Hideta
  • 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
  • Patent number: 10625349
    Abstract: An object is to prolong the life of a cubic boron nitride cutting tool used for cutting a heat-resistant alloy. A cubic boron nitride cutting tool includes an edge tip made of a sintered cubic boron nitride compact including cubic boron nitride particles; and a base metal that holds the edge tip at a corner portion of the base metal, wherein a cutting edge formed on the edge tip of the tool has a positive rake angle.
    Type: Grant
    Filed: July 3, 2018
    Date of Patent: April 21, 2020
    Assignee: SUMITOMO ELECTRIC HARDMETAL CORP.
    Inventors: Tsutomu Hirano, Katsumi Okamura, Naoki Watanobe
  • 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
  • Patent number: 10603726
    Abstract: A surface coated cutting tool having surfaces including a rake face and a flank face and a cutting edge defined by a boundary portion between the rake face and the flank face includes a substrate and a coating which covers the surfaces of the substrate, the coating having a TiAlN layer having an NaCl type crystal structure, and relation of 0.65<XR?0.9, 0.65<XF?0.9, 0.4?XE?0.7, XR?XE?0.2, and XF?XE?0.2 being satisfied, with a composition of the TiAlN layer in a cutting edge region located in the cutting edge being expressed as Ti1-XEAlXEN, a composition thereof in a rake face region located in the rake face being expressed as Ti1-XRAlXRN, and a composition thereof in a flank face region located in the flank face being expressed as Ti1-XFAlXFN.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: March 31, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Satoshi Ono, Shinya Imamura, Takanori Detani, Anongsack Paseuth
  • Patent number: 10603720
    Abstract: A bonded diamond body having a high bonded strength is provided. The bonded diamond body includes a sintered polycrystalline diamond body, a hard substrate, and a hard layer provided between the sintered polycrystalline diamond body and the hard substrate, the sintered polycrystalline diamond body containing a diamond grain and a sintering aid, the hard substrate containing tungsten carbide and cobalt, and the hard layer containing cobalt and a hard grain made of a carbide, a nitride, or a carbonitride having a Vickers hardness of 1100 Hv or more.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: March 31, 2020
    Assignees: Sumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd.
    Inventors: Taisuke Higashi, Tadashi Yamaguchi, Shinichiro Yurugi, Mari Sogabe
  • Publication number: 20200070260
    Abstract: A cutting tool is a cutting tool constituted of a formed end mill, and includes a shank portion, a back chamfering edge portion, and an outer peripheral cutting edge portion. The back chamfering edge portion has a back chamfering edge. The outer peripheral cutting edge portion is located between the shank portion and the back chamfering edge portion and has a cutting edge at an outer peripheral surface of the outer peripheral cutting edge portion. The cutting edge of the outer peripheral cutting edge portion is a right hand cut left hand helix edge.
    Type: Application
    Filed: July 7, 2017
    Publication date: March 5, 2020
    Applicants: Sumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd.
    Inventors: Minoru YOSHIDA, Takashi KANDA, Satoshi TERAZAWA
  • Publication number: 20200061718
    Abstract: A surface-coated cutting tool includes a substrate and a coating formed on a surface of the substrate, the coating including one or two or more layers, at least one of the layers being an Al-rich layer including hard particles, the hard particle having a sodium chloride type crystal structure, and including a first unit phase in a form of a plurality of lumps and a second unit phase interposed between the lumps of the first unit phase, the first unit phase being composed of a nitride or carbonitride of AlxTi1?x, the first unit phase having an atomic ratio x of Al of 0.7 or more and 0.96 or less, the second unit phase being composed of a nitride or carbonitride of AlyTi1?y, the second unit phase having an atomic ratio y of Al exceeding 0.5 and less than 0.7.
    Type: Application
    Filed: July 7, 2017
    Publication date: February 27, 2020
    Applicants: Sumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd.
    Inventors: Anongsack PASEUTH, Yasuki KIDO, Shinya IMAMURA, Koji KURAMOCHI
  • Publication number: 20200061717
    Abstract: A surface-coated cutting tool includes a substrate and a coating formed on a surface of the substrate, the coating including one or two or more layers, at least one of the layers being an Al-rich layer including hard particles, the hard particle having a sodium chloride type crystal structure, and including a first unit phase in a form of a plurality of lumps and a second unit phase interposed between the lumps of the first unit phase, the first unit phase being composed of a nitride or carbonitride of AlxTi1-x, the first unit phase having an atomic ratio x of Al of 0.7 or more and 0.96 or less, the second unit phase being composed of a nitride or carbonitride of AlyTi1-y, the second unit phase having an atomic ratio y of Al exceeding 0.5 and less than 0.7.
    Type: Application
    Filed: July 7, 2017
    Publication date: February 27, 2020
    Applicants: Sumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd.
    Inventors: Anongsack PASEUTH, Yasuki KIDO, Shinya IMAMURA, Koji KURAMOCHI
  • Publication number: 20200061716
    Abstract: A surface-coated cutting tool includes a substrate and a coating formed on a surface of the substrate, the coating including one or two or more layers, at least one of the layers being an Al-rich layer including hard particles, the hard particle having a sodium chloride type crystal structure, and including a first unit phase in a form of a plurality of lumps and a second unit phase interposed between the lumps of the first unit phase, the first unit phase being composed of a nitride or carbonitride of AlxTi1-x, the first unit phase having an atomic ratio x of Al of 0.7 or more and 0.96 or less, the second unit phase being composed of a nitride or carbonitride of AlyTi1-y, the second unit phase having an atomic ratio y of Al exceeding 0.5 and less than 0.7.
    Type: Application
    Filed: July 11, 2017
    Publication date: February 27, 2020
    Applicants: Sumitomo Electric Hardmetal Corp., Sumitomo Electric Industries, Ltd.
    Inventors: Anongsack PASEUTH, Yasuki KIDO, Shinya IMAMURA, Koji KURAMOCHI
  • Patent number: 10569317
    Abstract: A single-crystal diamond includes a pair of main surfaces facing each other, an impurity concentration being changed along a first direction in each of the main surfaces.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: February 25, 2020
    Assignees: Sumitomo Electric Industries, Ltd., Sumitomo Electric Hardmetal Corp.
    Inventors: Yoshiki Nishibayashi, Natsuo Tatsumi, Takuya Nohara, Yutaka Kobayashi, Akihiko Ueda
  • Patent number: D879846
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: March 31, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Takeshi Sato, Tadashi Yamaguchi, Shinichiro Yurugi
  • Patent number: D879847
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: March 31, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Takeshi Sato, Tadashi Yamaguchi, Shinichiro Yurugi
  • Patent number: D879848
    Type: Grant
    Filed: September 5, 2018
    Date of Patent: March 31, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Keiji Kinoshita, Kouki Matsubara, Yusuke Koike
  • Patent number: D882653
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: April 28, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Machiko Abe, Hiroyuki Shimada, Kazuya Yano