Patents by Inventor Satoshi Shirakami

Satoshi Shirakami 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).

  • Patent number: 10377200
    Abstract: A coupling structure includes a hollow rod section formed of a metal pipe and fastening sections formed by plastic deformation of the metal pipe so as to be connected with end sections of the hollow rod section. The fastening section includes a pair of base end sections which are each connected with a peripheral wall section forming a closed cross-section at the end section of the hollow rod section, and are separated from each other, and a bottom wall including a flat surface connected with the pair of the base end sections, and a pair of front end sections including a pair of side walls curving inwards from at least widthwise end sections of the bottom wall on a base end section side.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: August 13, 2019
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Satoshi Shirakami, Masaaki Mizumura, Tohru Yoshida
  • Patent number: 10352836
    Abstract: An evaluation method of a plastic material includes: a first shearing process of performing simple shearing deformation with respect to a first plastic sheet; a second shearing process of performing simple shearing deformation with respect to a second plastic sheet; a first partial stress-strain curve data obtaining process of obtaining first partial stress-strain curve data; a second partial stress-strain curve data obtaining process of obtaining second partial stress-strain curve data; and a synthesized stress-strain curve data obtaining process of obtaining synthesized stress-strain curve data based on the first partial stress-strain curve data and the second partial stress-strain curve data.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: July 16, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Satoshi Shirakami, Nobuo Yoshikawa, Tohru Yoshida, Hiroshi Yoshida
  • Publication number: 20190168588
    Abstract: [Object] Provided is a configuration that makes up for a lack of tensile rigidity and a lack of collision properties at the same time. [Solution] An automotive exterior panel according to the present invention: an exterior material 110; and a reinforcing member 120 that is in contact along an automobile inside surface of the exterior material 110 and of which a second moment of area in a direction orthogonal to the exterior material is less than or equal to 15,000 mm4 in a cross section orthogonal to a longitudinal direction of the reinforcing member. By this configuration, the second moment of area in a direction orthogonal to the longitudinal direction of the reinforcing member 120 is made less than or equal to 15,000 mm4, and hence a lack of tensile rigidity can be made up for at the same time.
    Type: Application
    Filed: July 26, 2017
    Publication date: June 6, 2019
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Toshiya SUZUKI, Yoshiaki NAKAZAWA, Yasuhiro ITO, Satoshi SHIRAKAMI
  • Publication number: 20190168587
    Abstract: To make it possible to make impact absorption at the time of a collision even when there is no sufficient space. [Solution] An impact absorption member according to the present invention includes: a member that is placed adjacent to an exterior material 110 of an automobile and in which a height in a direction orthogonal to the exterior material is larger than a width in a direction along the exterior material in a cross section orthogonal to an extending direction of the member. By this configuration, a first member 122 and a second member 124 are arranged so as to extend in different directions and be adjacent to the exterior material 110 of an automobile, and therefore impact absorption at the time of a collision can be made even when there is no sufficient space.
    Type: Application
    Filed: July 26, 2017
    Publication date: June 6, 2019
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Toshiya SUZUKI, Yoshiaki NAKAZAWA, Yasuhiro ITO, Satoshi SHIRAKAMI
  • Publication number: 20190143775
    Abstract: A coupling structure includes a hollow rod section formed of a metal pipe and fastening sections formed by plastic deformation of the metal pipe so as to be connected with end sections of the hollow rod section. The fastening section includes a pair of base end sections which are each connected with a peripheral wall section forming a closed cross-section at the end section of the hollow rod section, and are separated from each other, and a bottom wall including a flat surface connected with the pair of the base end sections, and a pair of front end sections including a pair of side walls curving inwards from at least widthwise end sections of the bottom wall on a base end section side.
    Type: Application
    Filed: January 10, 2019
    Publication date: May 16, 2019
    Applicant: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Satoshi SHIRAKAMI, Masaaki MIZUMURA, Tohru YOSHIDA
  • Patent number: 10220662
    Abstract: A coupling structure includes a hollow rod section formed of a metal pipe and fastening sections formed by plastic deformation of the metal pipe so as to be connected with end sections of the hollow rod section. The fastening section includes a pair of base end sections which are each connected with a peripheral wall section forming a closed cross-section at the end section of the hollow rod section, and are separated from each other, and a bottom wall including a flat surface connected with the pair of the base end sections, and a pair of front end sections including a pair of side walls curving inwards from at least widthwise end sections of the bottom wall on a base end section side.
    Type: Grant
    Filed: June 7, 2013
    Date of Patent: March 5, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Satoshi Shirakami, Masaaki Mizumura, Tohru Yoshida
  • Publication number: 20190009829
    Abstract: [Object] To achieve a weight reduction of a car body structure while maintaining collision safety to collisions from the front side of the vehicle. [Solution] A vehicle front portion structure 1 according to the present invention includes: a framework member 2 in a gutter shape provided in a vehicle length direction from a front box to a cabin and having a side wall 22; and a dash lower panel 3 that includes a gutter section 4A having a side wall 42 and fitted into an inside of the framework member 2 and in which the side wall 42 of the gutter section 4A and the side wall 22 of the framework member 2 are joined together.
    Type: Application
    Filed: January 27, 2017
    Publication date: January 10, 2019
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Satoshi SHIRAKAMI, Kenichiro OTSUKA, Yoshiaki NAKAZAWA
  • Publication number: 20180200772
    Abstract: There is provided a hole widening method including a preparing process of preparing a forming tool which has a diameter-increasing portion increasing in diameter from a front end side toward a rear end side and a line-shaped projection formed to protrude outward from a surface of the diameter-increasing portion, and a workpiece in which a pilot hole is formed; and a hole widening process of successively widening the pilot hole by pushing the forming tool into the pilot hole such that the line-shaped projection of the forming tool comes into point contact with a part of a circumferential edge portion of the pilot hole in the workpiece two times or more, and forming a stretched flange.
    Type: Application
    Filed: September 2, 2016
    Publication date: July 19, 2018
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Jun NITTA, Shigeru YONEMURA, Satoshi SHIRAKAMI, Takashi YASUTOMI
  • Publication number: 20180136100
    Abstract: In a breaking prediction method of predicting a breaking portion of a component, which is obtained by forming a metal sheet, by using a finite element method, the breaking portion is easily and reliably extracted.
    Type: Application
    Filed: May 18, 2016
    Publication date: May 17, 2018
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Jun NITTA, Shigeru YONEMURA, Satoshi SHIRAKAMI, Takashi YASUTOMI
  • Publication number: 20180107772
    Abstract: A stretch flange crack prediction method of predicting initiation of stretch flange cracks that occurs in a flange end section during stretch flange forming of a deformable sheet, includes: a measurement value acquisition process of acquiring, for each of a plurality of sheet-shaped test pieces, a fracture strain measurement value, a normal strain gradient measurement value, and a circumferential strain gradient measurement value; a CAE analysis process of acquiring a maximum major strain maximum element having a highest maximum major strain, a normal strain gradient of the maximum major strain maximum element, and a circumferential strain gradient of the maximum major strain maximum element; a fracture determination threshold acquisition process of acquiring a fracture determination threshold by converting the fracture strain measurement value; and a prediction process of predicting that stretch flange cracks will be initiated, when the maximum major strain is equal to or higher than the fracture determinati
    Type: Application
    Filed: July 2, 2015
    Publication date: April 19, 2018
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Satoshi SHIRAKAMI, Hiroshi YOSHIDA, Takashi MIYAGI, Jun NITTA, Tohru YOSHIDA
  • Publication number: 20170191915
    Abstract: An evaluation method of a plastic material includes: a first shearing process of performing simple shearing deformation with respect to a first plastic sheet; a second shearing process of performing simple shearing deformation with respect to a second plastic sheet; a first partial stress-strain curve data obtaining process of obtaining first partial stress-strain curve data; a second partial stress-strain curve data obtaining process of obtaining second partial stress-strain curve data; and a synthesized stress-strain curve data obtaining process of obtaining synthesized stress-strain curve data based on the first partial stress-strain curve data and the second partial stress-strain curve data.
    Type: Application
    Filed: May 8, 2015
    Publication date: July 6, 2017
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Satoshi SHIRAKAMI, Nobuo YOSHIKAWA, Tohru YOSHIDA, Hiroshi YOSHIDA
  • Patent number: 9539630
    Abstract: A method for bending a sheet metal comprises: a hardness adjustment process wherein a blank (10), including a high-hardness region (11) and a low-hardness region (12) having a lower hardness than the high hardness region (11), is formed by changing the hardness of at least a part of a sheet metal; and a bending process wherein a product (20) is formed by bending low-hardness region (12) of blank (10).
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: January 10, 2017
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Masaaki Mizumura, Koichi Sato, Satoshi Shirakami
  • Publication number: 20160339501
    Abstract: In the present invention, in a piercing punch and a burring punch which are shaft members having a first axis line as the center axis lines and are provided so as to be movable along the first axis line, first, after prepared holes having the first axis line as the center axis lines with respect to the first wall portion and the second wall portion are formed using the piercing punch, burring holes having the first axis line as the center axis lines with respect to the first wall portion and the second wall portion are formed using the burring punch.
    Type: Application
    Filed: January 29, 2015
    Publication date: November 24, 2016
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Satoshi SHIRAKAMI, Masaaki MIZUMURA, Tohru YOSHIDA
  • Patent number: 9452459
    Abstract: A roll forming device, for roll forming for the purpose of manufacturing shaped steel the cross-sectional shape of which varies in the longitudinal direction, is equipped with: first die rolls having an annular ridge part the cross-sectional shape of which varies in the circumferential direction; second die rolls having an annular groove part the cross-sectional shape of which varies in the circumferential direction; and a drive device for the first die rolls and the second die rolls. A gap is provided at the side surfaces of the annular ridge part of the first die rolls, across the entire circumference in the circumferential direction, such that the gap with respect to the side surfaces of the annual groove parts of the second die rolls widens inward in the radial direction.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: September 27, 2016
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Seiichi Daimaru, Masahiro Kubo, Masaaki Mizumura, Koichi Sato, Satoshi Shirakami, Yasushi Yamamoto
  • Publication number: 20150251234
    Abstract: A roll forming device, for roll forming for the purpose of manufacturing shaped steel the cross-sectional shape of which varies in the longitudinal direction, is equipped with: first die rolls having an annular ridge part the cross-sectional shape of which varies in the circumferential direction; second die rolls having an annular groove part the cross-sectional shape of which varies in the circumferential direction; and a drive device for the first die rolls and the second die rolls. A gap is provided at the side surfaces of the annular ridge part of the first die rolls, across the entire circumference in the circumferential direction, such that the gap with respect to the side surfaces of the annual groove parts of the second die rolls widens inward in the radial direction.
    Type: Application
    Filed: September 24, 2012
    Publication date: September 10, 2015
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Seiichi Daimaru, Masahiro Kubo, Masaaki Mizumura, Koichi Sato, Satoshi Shirakami, Yasushi Yamamoto
  • Publication number: 20150097350
    Abstract: A coupling structure includes a hollow rod section formed of a metal pipe and fastening sections formed by plastic deformation of the metal pipe so as to be connected with end sections of the hollow rod section. The fastening section includes a pair of base end sections which are each connected with a peripheral wall section forming a closed cross-section at the end section of the hollow rod section, and are separated from each other, and a bottom wall including a flat surface connected with the pair of the base end sections, and a pair of front end sections including a pair of side walls curving inwards from at least widthwise end sections of the bottom wall on a base end section side.
    Type: Application
    Filed: June 7, 2013
    Publication date: April 9, 2015
    Inventors: Satoshi Shirakami, Masaaki Mizumura, Tohru Yoshida
  • Publication number: 20130333190
    Abstract: A method for bending a sheet metal comprises: a hardness adjustment process wherein a blank (10), including a high-hardness region (11) and a low-hardness region (12) having a lower hardness than the high hardness region (11), is formed by changing the hardness of at least a part of a sheet metal; and a bending process wherein a product (20) is formed by bending low-hardness region (12) of blank (10).
    Type: Application
    Filed: March 5, 2012
    Publication date: December 19, 2013
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Masaaki Mizumura, Koichi Sato, Satoshi Shirakami