Patents by Inventor Toru Yonebayashi

Toru Yonebayashi 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: 20230241662
    Abstract: A burring processing method including increasing a diameter of a prepared hole provided in a metal component and bending a part of the metal component to form a burring processed portion (110) including an upright portion (120) and a curved portion (130), wherein in a cross-section that passes through an axis (cb) of the burring processed portion (110) and is parallel to the axis (cb) of the buffing processed portion (110), a cross-sectional shape of the curved portion (130) on an inner surface of the curved portion consists of a curve, and a length of the curved portion (130) in a direction perpendicular to the axis (cb) of the burring processed portion (110) is at least 1.2 times a height of the curved portion in a direction parallel to the axis (cb) of the burring processed portion (110).
    Type: Application
    Filed: July 9, 2021
    Publication date: August 3, 2023
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Kenichiro OTSUKA, Masafumi AZUMA, Yasuhiro ITO, Toru YONEBAYASHI
  • Publication number: 20230100272
    Abstract: A stiffened panel structure includes a panel-shaped component and a wire. The panel-shaped component has a panel body that curves in such a manner as to be convex outward. The wire has a first end portion and a second end portion. The first end portion is bonded to a first point on the inner surface of the panel body. The second end portion is bonded to a second point on the inner surface of the panel body. The wire is strained between the first point and the second point.
    Type: Application
    Filed: February 26, 2021
    Publication date: March 30, 2023
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Kenichiro OTSUKA, Toru YONEBAYASHI, Satoshi SHIRAKAMI, Yasunori SAWA, Masafumi AZUMA, Ryuichi NISHIMURA
  • Publication number: 20230039571
    Abstract: This steel sheet for a can is a steel sheet for a can containing, by mass %, C: 0.010% to 0.050%, Si: 0.020% or less, Mn: 0.10% to 0.60%, P: 0.020% or less, S: 0.020% or less, Al: 0.050% or less, N: 0.0100% or less, Nb: 0% to 0.03%, Ti: 0% to 0.03%, B: 0% to 0.0020%, and a remainder including Fe and an impurity, in which, when the number of carbides having an equivalent circle diameter of 2 ?m or more and 5 ?m or less is indicated by a, and the number of carbides having an equivalent circle diameter of 0.1 ?m or more and less than 2 ?m is indicated by b, a/b satisfies a range of the following formula (1), a fracture strain is 1.6 or more, and a sheet thickness is 0.10 to 0.30 mm. a/b<0.
    Type: Application
    Filed: February 17, 2020
    Publication date: February 9, 2023
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Toshiki NONAKA, Toru YONEBAYASHI
  • Patent number: 10603702
    Abstract: A method for producing a metal sheet with raised lines uses a rolling mill including roll stands. In a preparing step, a grooved roll is prepared, the grooved roll including grooves. In a choosing step, a stand at least one stage before the last stand is chosen. In an incorporating step, the grooved roll is incorporated in as an upper roll of the chosen, specified stand. In a forming step, a workpiece is formed into a metal sheet with raised lines formed corresponding to the respective grooves. In the forming step, a maximum rolling reduction achieved by rolls of the specified stand is set to a provisional value that is lower than a required value. After the leading edge of the workpiece reaches the stand next to the specified stand, the maximum rolling reduction of the specified stand is changed to the required value.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: March 31, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Hitoshi Nikaido, Toru Yonebayashi, Koichi Sato, Teruo Ito, Daiki Kamada
  • Patent number: 10596613
    Abstract: A producing method of the press formed product includes a preparation step of preparing a metal sheet as a starting material; and a press working step of performing press working on the starting material. The press working step includes: during a time period from when pushing-in of the starting material into the die by the punch is started or immediately thereafter until the pushing-in of the punch with respect to the die reaches a predetermined distance short of a bottom dead point for the pushing-in, holding the pad at a position distant from the punch by the predetermined distance; when the pushing-in of the punch with respect to the die reaches the predetermined distance short of the bottom dead point, receiving the pad in the die; and continuing the pushing-in of the punch with respect to the die and the pad to the bottom dead point.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: March 24, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Ryuichi Nishimura, Yoshiaki Nakazawa, Toru Yonebayashi, Koichi Sato
  • Patent number: 10406582
    Abstract: A press-forming apparatus is an apparatus for producing a press-formed product having a hat-shaped cross section that has an external shape that curves in an L shape along a longitudinal direction in a planar view, and includes a punch, a first blank holder, a second blank holder, a preceding portion, a second die and a pad. When pushing the punch into a die to form a metal plate into the press-formed product, a first guide face of the preceding portion precedes a second guide face of the second die, and thereafter sliding of the first blank holder and the preceding portion relative to the punch is restricted and pushing of the punch into the die is continued in the restricted state to form the press-formed product. By this means, the press-formed product in which cracks and wrinkles are reduced is obtained.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: September 10, 2019
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Ryuichi Nishimura, Yoshiaki Nakazawa, Kenichiro Otsuka, Toru Yonebayashi, Ryuichi Harada, Koji Hashimoto
  • Publication number: 20190202502
    Abstract: To provide a panel whose surface rigidity can be improved appropriately in accordance with a load. Provided is a panel including: a load point to which a load is applied from the outside; and a protrusion that protrudes from a surface of the panel and is formed continuously or discontinuously around the load point. The protrusion intersects, at a plurality of positions, each of a plurality of virtual straight lines extending radially from the load point.
    Type: Application
    Filed: March 7, 2019
    Publication date: July 4, 2019
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Toru YONEBAYASHI, Yoshiaki NAKAZAWA
  • Patent number: 10272954
    Abstract: To provide a panel whose surface rigidity can be improved appropriately in accordance with a load. Provided is a panel including: a load point to which a load is applied from the outside; and a protrusion that protrudes from a surface of the panel and is formed continuously or discontinuously around the load point. The protrusion intersects, at a plurality of positions, each of a plurality of virtual straight lines extending radially from the load point.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: April 30, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Toru Yonebayashi, Yoshiaki Nakazawa
  • Patent number: 10071410
    Abstract: There is provided a manufacturing apparatus and a manufacturing method for a stretch-formed product which can improve the yield of material in the stretch forming performed while clamping the blank by the lock beads.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: September 11, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Ryuichi Nishimura, Yorifumi Sakamoto, Toru Yonebayashi, Yoshihiko Masuo, Yoshiaki Nakazawa, Koji Hashimoto
  • Patent number: 10030388
    Abstract: A panel comprises a reinforcing unit including a plurality of first rectangular regions and a plurality of second rectangular regions. The first and second rectangular regions are in rows and columns, the first and second rectangular regions in each row being arranged alternately and the first and second rectangular regions in each column being arranged alternately. Each of the first rectangular regions includes a fully-covering first protrusion protruding in a first direction perpendicular to an imaginary reference plane and having a flat top surface. Each of the second rectangular regions includes a partially-covering second protrusion protruding in a second direction opposite to the first direction and having a flat top surface. A partially-covering reinforcing protrusion extends between opposite sides and protrudes in the first direction and having a flat top surface. The top surface of the reinforcing protrusion forms one face together with the top surface of the first protrusion.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: July 24, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Toru Yonebayashi, Yoshiaki Nakazawa, Nobutaka Shimizu
  • Publication number: 20170333972
    Abstract: A producing method of the press formed product includes a preparation step of preparing a metal sheet as a starting material, and a press working step of performing press working on the starting material by using a punch, and a pad and a die that are paired with the punch. The press working step includes a first step of forming, by the punch and the pad, the entire region of a top panel part, the entire region of each of a ridge line parts including the shape-changing part, and a region up to a predetermined height from the border between a vertical wall part and the ridge line part of a region of each of the vertical wall parts, and a second step of forming, subsequent to the first step, by the punch and the die, the remaining regions with the starting material sandwiched between the punch and the pad.
    Type: Application
    Filed: November 11, 2015
    Publication date: November 23, 2017
    Inventors: Ryuichi NISHIMURA, Yoshiaki NAKAZAWA, Toru YONEBAYASHI, Seiya ISHII, Koichi SATO
  • Publication number: 20170320113
    Abstract: A method for producing a metal sheet with raised lines uses a rolling mill including roll stands. In a preparing step, a grooved roll is prepared, the grooved roll including grooves. In a choosing step, a stand at least one stage before the last stand is chosen. In an incorporating step, the grooved roll is incorporated in as an upper roil of the chosen, specified stand. In a forming step, a workpiece is formed into a metal sheet with raised lines formed corresponding to the respective grooves. In the forming step, a maximum rolling reduction achieved by rolls of the specified stand is set to a provisional value that is lower than a required value. After the leading edge of the workpiece reaches the stand next to the specified stand, the maximum rolling reduction of the specified stand is changed to the required value.
    Type: Application
    Filed: October 7, 2015
    Publication date: November 9, 2017
    Inventors: Hitoshi NIKAIDO, Toru YONEBAYASHI, Koichi SATO, Teruo ITO, Daiki KAMADA
  • Publication number: 20170291203
    Abstract: A method for producing a metal sheet with raised lines uses a rolling mill including a roll stand and produces a metal sheet including, on each of an upper surface and a lower surface, a plurality of raised lines extending in a rolling direction. The method includes a preparing step, an incorporating step, and a forming step. In the preparing step, grooved rolls are prepared, each of the grooved rolls including a plurality of grooves in an outer peripheral surface. In the incorporating step, the grooved rolls are incorporated in the roll stand as an upper roll and a lower roll, respectively. In the forming step, a workpiece is rolled by the rolling mill and is formed into a metal sheet with raised lines formed corresponding to the respective grooves of the grooved rolls.
    Type: Application
    Filed: October 7, 2015
    Publication date: October 12, 2017
    Inventors: Hitoshi NIKAIDO, Toru YONEBAYASHI, Koichi SATO, Daiki KAMADA
  • Publication number: 20170291208
    Abstract: A producing method of the press formed product includes a preparation step of preparing a metal sheet as a starting material; and a press working step of performing press working on the starting material. The press working step includes: during a time period from when pushing-in of the starting material into the die by the punch is started or immediately thereafter until the pushing-in of the punch with respect to the die reaches a predetermined distance short of a bottom dead point for the pushing-in, holding the pad at a position distant from the punch by the predetermined distance; when the pushing-in of the punch with respect to the die reaches the predetermined distance short of the bottom dead point, receiving the pad in the die; and continuing the pushing-in of the punch with respect to the die and the pad to the bottom dead point.
    Type: Application
    Filed: September 29, 2015
    Publication date: October 12, 2017
    Inventors: Ryuichi NISHIMURA, Yoshiaki NAKAZAWA, Toru YONEBAYASHI, Koichi SATO
  • Publication number: 20170001232
    Abstract: There is provided a manufacturing apparatus and a manufacturing method for a stretch-formed product which can improve the yield of material in the stretch forming performed while clamping the blank by the lock beads.
    Type: Application
    Filed: December 10, 2014
    Publication date: January 5, 2017
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Ryuichi NISHIMURA, Yorifumi SAKAMOTO, Toru YONEBAYASHI, Yoshihiko MASUO, Yoshiaki NAKAZAWA, Koji HASHIMOTO
  • Publication number: 20160347376
    Abstract: To provide a panel whose surface rigidity can be improved appropriately in accordance with a load. Provided is a panel including: a load point to which a load is applied from the outside; and a protrusion that protrudes from a surface of the panel and is formed continuously or discontinuously around the load point. The protrusion intersects, at a plurality of positions, each of a plurality of virtual straight lines extending radially from the load point.
    Type: Application
    Filed: March 13, 2015
    Publication date: December 1, 2016
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Toru YONEBAYASHI, Yoshiaki NAKAZAWA
  • Publication number: 20160296989
    Abstract: A press-forming apparatus is an apparatus for producing a press-formed product having a hat-shaped cross section that has an external shape that curves in an L shape along a longitudinal direction in a planar view, and includes a punch, a first blank holder, a second blank holder, a preceding portion, a second die and a pad. When pushing the punch into a die to form a metal plate into the press-formed product, a first guide face of the preceding portion precedes a second guide face of the second die, and thereafter sliding of the first blank holder and the preceding portion relative to the punch is restricted and pushing of the punch into the die is continued in the restricted state to form the press-formed product. By this means, the press-formed product in which cracks and wrinkles are reduced is obtained.
    Type: Application
    Filed: December 2, 2014
    Publication date: October 13, 2016
    Inventors: Ryuichi NISHIMURA, Yoshiaki NAKAZAWA, Kenichiro OTSUKA, Toru YONEBAYASHI, Ryuichi HARADA, Koji HASHIMOTO
  • Publication number: 20160273222
    Abstract: A panel comprises a reinforcing unit including a plurality of first rectangular regions and a plurality of second rectangular regions. The first and second rectangular regions are in rows and columns, the first and second rectangular regions in each row being arranged alternately and the first and second rectangular regions in each column being arranged alternately. Each of the first rectangular regions includes a fully-covering first protrusion protruding in a first direction perpendicular to an imaginary reference plane and having a flat top surface. Each of the second rectangular regions includes a partially-covering second protrusion protruding in a second direction opposite to the first direction and having a flat top surface. A partially-covering reinforcing protrusion extends between opposite sides and protrudes in the first direction and having a flat top surface. The top surface of the reinforcing protrusion forms one face together with the top surface of the first protrusion.
    Type: Application
    Filed: November 25, 2014
    Publication date: September 22, 2016
    Inventors: Toru YONEBAYASHI, Yoshiaki NAKAZAWA, Nobutaka SHIMIZU
  • Patent number: 9296430
    Abstract: A front floor panel for an automotive body as a lightweight sheet can be reliably press-formed without a press forming loads becoming excessively large, can have desired stiffness, and noise and vibration characteristics for all directions since there is little stiffness anisotropy. The front floor panel includes a floor tunnel formed in a center in an automotive width direction to be oriented to a longitudinal direction, upright flanges disposed left and right formed at a left and right end portions in the automotive width direction to be joined to side sills, and a left and right plane portions formed between the upright flanges disposed left and right and a left and right longitudinal wall portions of the floor tunnel. In loop-shaped areas including outer edge portions of the plane portions, convex-concave parts in specific shapes are formed, and remaining areas excluding the loop-shaped areas are formed into flat sheet shapes.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: March 29, 2016
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Toru Yonebayashi, Toshiya Suzuki, Yoshiaki Nakazawa, Masaya Takahashi
  • Publication number: 20140367999
    Abstract: A front floor panel for an automotive body as a lightweight sheet can be reliably press-formed without a press forming loads becoming excessively large, can have desired stiffness, and noise and vibration characteristics for all directions since there is little stiffness anisotropy. The front floor panel includes a floor tunnel formed in a center in an automotive width direction to be oriented to a longitudinal direction, upright flanges disposed left and right formed at a left and right end portions in the automotive width direction to be joined to side sills, and a left and right plane portions formed between the upright flanges disposed left and right and a left and right longitudinal wall portions of the floor tunnel. In loop-shaped areas including outer edge portions of the plane portions, convex-concave parts in specific shapes are formed, and remaining areas excluding the loop-shaped areas are formed into flat sheet shapes.
    Type: Application
    Filed: December 20, 2012
    Publication date: December 18, 2014
    Inventors: Toru Yonebayashi, Toshiya Suzuki, Yoshiaki Nakazawa, Masaya Takahashi