Patents by Inventor Ryuichi Nishimura

Ryuichi Nishimura 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: 20190359157
    Abstract: A crash box has excellent axial crushing performance and in which, even if the sheet thickness of a tubular body constituting the crash box is smaller than 1.4 mm, good welding can be performed with the tubular body butted against a set plate. The crash box (1) having a metallic longer-length tubular body and a method for producing the crash box are provided. The tubular body has a basic cross-sectional shape that is a flat polygon surrounded by a plurality of ridges (2-1 to 2-4) extending in a longitudinal direction and a plurality of side wall portions (4), includes one or more groove portions (3-1 and 3-2) on side wall portions (4) on long sides substantially parallel to the major axis direction of the cross section that extend in longitudinal direction, and includes outward flanges (5-1 to 5-4) in an end portion in the longitudinal direction.
    Type: Application
    Filed: June 11, 2019
    Publication date: November 28, 2019
    Inventors: Ryuichi NISHIMURA, Kenichiro Otsuka, Yasuhiro Ito, Yoshiaki Nakazawa
  • Patent number: 10435081
    Abstract: A joining structure of the invention includes a first metal sheet and a pair of second metal sheets. Each of the pair of second metal sheets is overlapped on the first metal sheet in a state where an end surface of one of the second metal sheets and an end surface of the other second metal sheet face each other, and the end surfaces that face each other are integrally joined to the first metal sheet by means of a single mass of melted metal.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: October 8, 2019
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kenichiro Otsuka, Yoshiaki Nakazawa, Ryuichi Nishimura, Masanori Yasuyama
  • 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
  • Patent number: 10407101
    Abstract: A structural member made of metal, formed so as to extend long in a predetermined direction, and having a gutter bottom, two ridges continuing to both ends in a width direction of the gutter bottom, and two vertical walls continuing to the two ridges, includes an outward continuous flange continuously formed at least along the gutter bottom, the ridges, and the vertical walls at an end in the predetermined direction, in which a width of the gutter bottom is reduced as a distance from the end having the outward continuous flange becomes larger.
    Type: Grant
    Filed: December 1, 2015
    Date of Patent: September 10, 2019
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Kenichiro Otsuka, Yoshiaki Nakazawa, Ryuichi Nishimura, Yasuhiro Ito
  • Patent number: 10363892
    Abstract: A crash box has excellent axial crushing performance and in which, even if the sheet thickness of a tubular body constituting the crash box is smaller than 1.4 mm, good welding can be performed with the tubular body butted against a set plate. The crash box (1) having a metallic longer-length tubular body and a method for producing the crash box are provided. The tubular body has a basic cross-sectional shape that is a flat polygon surrounded by a plurality of ridges (2-1 to 2-4) extending in a longitudinal direction and a plurality of side wall portions (4), includes one or more groove portions (3-1 and 3-2) on side wall portions (4) on long sides substantially parallel to the major axis direction of the cross section that extend in longitudinal direction, and includes outward flanges (5-1 to 5-4) in an end portion in the longitudinal direction.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: July 30, 2019
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Ryuichi Nishimura, Kenichiro Otsuka, Yasuhiro Ito, Yoshiaki Nakazawa
  • Patent number: 10265752
    Abstract: In forming a press-formed product that is made of a high-tensile steel sheet having a tensile strength of 390 MPa or more, and has a substantially gutter-shaped cross section and an outward continuous flange, wrinkling in ridges and cracking in the outward continuous flange are reduced. A method for manufacturing a press-formed product that is made of a high-tensile steel sheet of 390 MPa or more, and has a substantially gutter-shaped cross section and an outward continuous flange in at least one end in a predetermined direction includes a first step in which, after a first pad restrains at least a part of a portion to be formed into a gutter bottom in a forming material, a second pad restrains at least a part of the end of portions to be formed into ridges and subsequently carries out press forming.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: April 23, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kenichiro Otsuka, Yoshiaki Nakazawa, Ryuichi Nishimura, Yasuhiro Ito
  • Publication number: 20190111463
    Abstract: A method for producing a press-formed product includes a first pressing step and a second pressing step. In the first pressing step, an intermediate formed product is formed from a processed material by using first press tooling. The intermediate formed product includes a stepped section of a top plate section, a temporary vertical wall section adjacent to the top plate section via a ridge section and having at least part of the shape of the vertical wall section, and a temporary flange section adjacent to the temporary vertical wall section via a temporary ridge section. In the second pressing step, the press-formed product is formed from the intermediate formed product. In the second pressing step, forming is performed such that the temporary ridge section is moved toward the temporary flange section with at least part of the top plate section of the intermediate formed product restricted.
    Type: Application
    Filed: April 3, 2017
    Publication date: April 18, 2019
    Inventors: Junki NATORI, Yoshiaki NAKAZAWA, Ryuichi NISHIMURA, Keiji OGAWA
  • Patent number: 10196091
    Abstract: This automobile member has a closed cross section including joint portions in which edge portions of two side walls of an inner panel are joined with edge portions of two side walls of an outer panel, in which in a first region, a first region outer height ho1 and a first region inner height hi1 have a constant value and the difference between the first region outer height ho1 and the first region inner height hi1 is smaller than the difference between a second region outer height ho2 and a second region inner height hi2; in a second region, the second region outer height ho2 has a value which is larger than the second region inner height hi2 and constant, or the second region outer height ho2 has a value which is smaller than the second region inner height hi2 and constant; in a first transition region, a first transition region outer height ho1˜2 is continuously varied between the first region outer height ho1 and the second region outer height ho2, and a first transition region inner height hi1˜2 is contin
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: February 5, 2019
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kenichiro Otsuka, Yoshiaki Nakazawa, Ryuichi Nishimura, Yasunori Sawa, Atsushi Ono, Takeshi Kawachi
  • Publication number: 20190030583
    Abstract: A production method includes a placement step, a first pressing step, and a second pressing step. In the placement step, a blank plate is placed in press tooling. In the first pressing step, the blank plate is caused to undergo bend forming in such a way that concave ridges, a concave area, and areas of concave-correspondence vertical wall areas that are areas adjacent to the concave ridges are formed in the blank plate. In the second pressing step, the resultant plate is caused to undergo draw forming in such a way that convex ridges, a convex area, areas of convex-correspondence vertical wall areas that are areas adjacent to the convex ridges are formed in the resultant plate.
    Type: Application
    Filed: March 28, 2017
    Publication date: January 31, 2019
    Inventors: Ryuichi NISHIMURA, Yoshiaki NAKAZAWA
  • Publication number: 20190009828
    Abstract: [Object] To achieve a weight reduction of a car body structure while maintaining collision safety to impacts from the rear side of the vehicle. [Solution] Provided is a vehicle rear portion structure 1 including a pair of rear frames 4 provided in the vehicle length direction and a rear floor panel 2 joined to the pair of rear frames 4, in which the rear floor panel 2 has a concave section 3 provided from the rear side of the vehicle toward the front side of the vehicle of the rear floor panel 2, and the concave section 3 is formed of a metal sheet having a tensile strength more than or equal to the tensile strength of the pair of rear frames 4. By this configuration, when an impact load from the rear side of the vehicle acts on the concave section 3 of the rear floor panel 2, the rear floor panel 2 can absorb collision energy in a principal way.
    Type: Application
    Filed: January 6, 2017
    Publication date: January 10, 2019
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yoshiaki NAKAZAWA, Ryuichi NISHIMURA
  • Publication number: 20180272407
    Abstract: This cutting device is a device for obtaining a processed material by cutting off an end portion of a plate material by a first cutting blade and a second cutting blade which relatively approach each other, and includes: a first contact part and the first cutting blade which clamp a processed material portion of the plate material from front and back surfaces thereof; the second cutting blade and a second contact part which clamp an end material portion of the plate material from front and back surfaces thereof; and a drive part which causes the first cutting blade and the second cutting blade to start relative approach while maintaining a flat state where the processed material portion and the end material portion are on the same plane.
    Type: Application
    Filed: February 1, 2016
    Publication date: September 27, 2018
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Ryuichi NISHIMURA, Yasuhiro ITO, 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: 10022764
    Abstract: In a press forming step of obtaining, from a blank of high-tensile strength steel sheet of 390 MPa or more, a press-formed product with a shape of cross section having a groove bottom part, ridge line parts, and vertical wall parts. An outward flange including parts along the ridge line parts is formed at an end part in a longitudinal direction. Forming parts to the ridge line parts is started by creating a region positioned at an end portion, in a longitudinal direction, of a part to be formed to the groove bottom part of the blank, which is separated from a punch top part. At that time or thereafter, the region is made to approach the punch top part.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: July 17, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Ryuichi Nishimura, Yoshiaki Nakazawa, Kenichiro Otsuka
  • Publication number: 20180185899
    Abstract: A method and apparatus for manufacturing a press component without generating cracks in a flange on an inner circumferential side of a curved portion includes press working by a free bending method on a blank consisting of an ultra-high tensile strength steel sheet. A press component is manufactured by performing cold press working on a blank of an ultra-high tensile strength steel sheet. By the press working, a material inflow facilitating portion that increases the amount by which a portion of the blank to be formed into an end portion of the press component flows into a portion of the blank to be formed into a flange on an inner circumferential side of the curved portion of the press component is provided in the vicinity of the portion of the blank to be formed into the flange on an inner circumferential side of the curved portion of the press component.
    Type: Application
    Filed: June 27, 2016
    Publication date: July 5, 2018
    Inventors: Masahiro SAITO, Ryuichi NISHIMURA, Yasuharu TANAKA, Takashi MIYAGI, Takashi YAMAMOTO
  • Patent number: 9902435
    Abstract: Provided is a structural member for an automotive body, which is excellent in load transfer capability and rigidity by effectively enhancing energy absorption efficiency provided by disposing a groove in the structural member having a substantially gutter-shaped cross section and a groove in the top plate. The structural member for an automotive body, the structural member consisting of a press-formed product made of a steel sheet, the press-formed product extending in a predetermined direction, including a top plate, a ridge continuing to the top plate, and a vertical wall continuing to the ridge, and having a substantially gutter-shaped cross section intersecting the predetermined direction, includes at least one groove formed in the top plate, and extending in the predetermined direction, and an outward flange formed at least in a region of the ridge in an end in the predetermined direction. The groove having a depth set according to a width of the groove and a sheet thickness of the steel sheet.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: February 27, 2018
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Ryuichi Nishimura, Kenichiro Otsuka, Yasuhiro Ito, Yoshiaki Nakazawa
  • Publication number: 20180009017
    Abstract: A method for producing a press-formed product that includes a pair of flat sections and a bend section that connects the flat sections, in which a bending radius of the bend section is R2 and an interior angle formed by the pair of flat sections is ?2, includes the steps bellow. In the first forming step, an intermediate formed product including a bend section in which a bending radius is R1 and an interior angle is ?1 is formed. In the second forming step, a portion of a bend section of the intermediate formed product is formed into the bend section of the press-formed product. R1, ?1, R2 and ?2 satisfy the conditions of Formulae (1) to (3) below: 1.05<A1/A2 ??(1); 1.0<R1/R2 ??(2); A1/A2<6.0/(R1/R2) ??(3), where, A1, A2 represents the supplementary angle of the interior angle ?1, ?2, respectively.
    Type: Application
    Filed: January 25, 2016
    Publication date: January 11, 2018
    Inventors: Kenichiro OTSUKA, Yoshiaki NAKAZAWA, Ryuichi NISHIMURA, Masahiro SAITO
  • Patent number: 9839951
    Abstract: A press-formed body (15) made of a high-tensile strength steel sheet of 390 MPa or more including a groove bottom part (15a), ridge line parts (15b, 15b) continuous to the groove bottom part (15a), and side wall parts (15c, 15c) continuous to the ridge line parts (15b, 15b), and in which an outward flange (16) is formed at an end part in a longitudinal direction is manufactured by a press-forming apparatus including a punch (11), a die (12), and a pad (14) which presses and binds a press-forming material (13) to the punch (11), thereby forming the press-formed body (15) without providing cutouts at a ridge line part flange portion of the outward flange, or generating lowering of material yield.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: December 12, 2017
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Ryuichi Nishimura, Kenichiro Otsuka, Yoshiaki Nakazawa, Yoshihiko Masuo, Toshiya Suzuki, Yoshiyuki Ikeda
  • Publication number: 20170349217
    Abstract: [Object] There is provided a long structural member made of metal, which has a substantially gutter-shaped cross section and is excellent in load transfer properties when an impact load is applied. [Solution] A structural member made of metal, formed so as to extend long in a predetermined direction, and having a gutter bottom, two ridges continuing to both ends in a width direction of the gutter bottom, and two vertical walls continuing to the two ridges, includes an outward continuous flange continuously formed at least along the gutter bottom, the ridges, and the vertical walls at an end in the predetermined direction, in which a width of the gutter bottom is reduced as a distance from the end having the outward continuous flange becomes larger.
    Type: Application
    Filed: December 1, 2015
    Publication date: December 7, 2017
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kenichiro OTSUKA, Yoshiaki NAKAZAWA, Ryuichi NISHIMURA, Yasuhiro ITO
  • 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: 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