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: 20170233008
    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: Application
    Filed: September 3, 2015
    Publication date: August 17, 2017
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kenichiro OTSUKA, Yoshiaki NAKAZAWA, Ryuichi NISHIMURA, Yasunori SAWA, Atsushi ONO, Takeshi KAWACHI
  • Publication number: 20170225717
    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: Application
    Filed: August 28, 2015
    Publication date: August 10, 2017
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kenichiro OTSUKA, Yoshiaki NAKAZAWA, Ryuichi NISHIMURA, Masanori YASUYAMA
  • 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: 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: 20160279692
    Abstract: To reduce the generation of cracking in the edge of the ridge flange (7a, 7b) and wrinkling near the base of the ridge flange and can suppress an increase in the pad load, while press forming the structural member (1) that is made of a high-tensile steel sheet or a thick steel sheet and that has a substantially gutter-shaped cross section and an outward continuous flange in an end of the structural member.
    Type: Application
    Filed: September 10, 2014
    Publication date: September 29, 2016
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Yasuhiro ITO, Ryuichi NISHIMURA, Kenichiro OTSUKA, Yoshiaki NAKAZAWA
  • Publication number: 20160280282
    Abstract: [Object] 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. [Solution] 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.
    Type: Application
    Filed: September 30, 2014
    Publication date: September 29, 2016
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Ryuichi NISHIMURA, Kenichiro OTSUKA, Yasuhiro ITO, Yoshiaki NAKAZAWA
  • Publication number: 20160221521
    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: September 24, 2014
    Publication date: August 4, 2016
    Inventors: Ryuichi NISHIMURA, Kenichiro OTSUKA, Yasuhiro ITO, Yoshiaki NAKAZAWA
  • Publication number: 20160199897
    Abstract: [Object] In forming a press-formed product (10) 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 (16), wrinkling in ridges (12a, 12b) and cracking in the outward continuous flange are reduced. [Solution] A method for manufacturing a press-formed product (10) 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 (16) in at least one end in a predetermined direction includes a first step in which, after a first pad (34-1) restrains at least a part of a portion to be formed into a gutter bottom (11) in a forming material (33), a second pad (34-2) restrains at least a part of the end of portions to be formed into ridges (12a, 12b) and subsequently carries out press forming.
    Type: Application
    Filed: September 10, 2014
    Publication date: July 14, 2016
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kenichiro OTSUKA, Yoshiaki NAKAZAWA, Ryuichi NISHIMURA, Yasuhiro ITO
  • Publication number: 20160114379
    Abstract: A press forming apparatus includes: a punch (31); a blank holder (32) disposed adjacent to the punch (31); a die (41) being a counterpart of the punch (31); and a pad (42) disposed to face the punch (31), wherein the punch (31) has a tip surface (31a), an outside surface (31b), and a stepped surface (31c) having shapes corresponding to a web portion, vertical wall portions, and a flange portion of a product, respectively. As a result that the punch (31) and the die (41) are relatively moved in a pressing direction in a state where a middle portion in a width direction of a workpiece (50) is sandwiched by the pad (42) and the punch (31) and an outer peripheral portion in the width direction of the workpiece (50) is bound by the blank holder (32) and the die (41), the outer peripheral portion in the width direction of the workpiece (50) gets out from between the blank holder (32) and the die (41), and the flange portion is shaped by the die (41) and the stepped surface (31c) of the punch (31).
    Type: Application
    Filed: June 27, 2014
    Publication date: April 28, 2016
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Ryuichi NISHIMURA, Kenichiro OTSUKA, Keiji OGAWA, Yoshiaki NAKAZAWA
  • Publication number: 20150367392
    Abstract: In a press forming step of obtaining, from a blank (300) of high-tensile strength steel sheet of 390 MPa or more, a press-formed product with a shape of cross section having at least a groove bottom part (101), ridge line parts (102), and vertical wall parts (103), and in which an outward flange (106) including parts (106a) along the ridge line parts (102) is formed at an end part in a longitudinal direction, forming of parts to be formed to the ridge line parts (102) is started by creating a state where a region (300a) positioned at least at an end portion in a longitudinal direction of a part to be formed to the groove bottom part (101) of the blank (300) is separated from a punch top part (201b), and at that time or thereafter, the region (300a) is made to approach the punch top part (201b).
    Type: Application
    Filed: March 20, 2014
    Publication date: December 24, 2015
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Ryuichi NISHIMURA, Yoshiaki NAKAZAWA, Kenichiro OTSUKA
  • Patent number: 9199670
    Abstract: In a floor cross member configured by a web surface (4a) as the top surface, a ridge part (4b) contiguous to the web surface (4a), and a vertical wall surface (4c) contiguous to the ridge part (4b), having a tensile strength of 440 MPa or larger, flanges (4e) are formed at both longitudinal ends continuously around at least the web surface (4a), the ridge part (4b) and the vertical wall surface (4c), and the floor cross member (4) is connected through the flanges (4e) to a tunnel part (2a) and to a side sill (3). The flange (4e) has a flange width lfc, at the center in the perimeter direction of the curved part (4e-2), not smaller than the minimum flange width lfs of the curved part (4e-2). Accordingly, a vehicle body, which is suppressed in deformation of the floor cross member (4) and improved in the torsional rigidity, is successfully provided.
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: December 1, 2015
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Kenichiro Otsuka, Ryuichi Nishimura, Yoshiaki Nakazawa
  • Publication number: 20150174634
    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). At a press-forming time, the pad (14) binds a part to be formed into the groove bottom part (15a) and a part having a length of one-third or more of a cross-sectional peripheral length of the ridge line part (15b) starting from a connecting part with the groove bottom part (15a) from among a part to be formed into the ridge line part (15b) in a vicinity of the outward flange (16) at the press-forming material (13).
    Type: Application
    Filed: June 20, 2013
    Publication date: June 25, 2015
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Ryuichi Nishimura, Kenichiro Otsuka, Yoshiaki Nakazawa, Yoshihiko Masuo, Toshiya Suzuki, Yoshiyuki Ikeda
  • Publication number: 20150061323
    Abstract: In a floor cross member configured by a web surface (4a) as the top surface, a ridge part (4b) contiguous to the web surface (4a), and a vertical wall surface (4c) contiguous to the ridge part (4b), having a tensile strength of 440 MPa or larger, flanges (4e) are formed at both longitudinal ends continuously around at least the web surface (4a), the ridge part (4b) and the vertical wall surface (4c), and the floor cross member (4) is connected through the flanges (4e) to a tunnel part (2a) and to a side sill (3). The flange (4e) has a flange width lfc, at the center in the perimeter direction of the curved part (4e-2), not smaller than the minimum flange width lfs of the curved part (4e-2). Accordingly, a vehicle body, which is suppressed in deformation of the floor cross member (4) and improved in the torsional rigidity, is successfully provided.
    Type: Application
    Filed: April 9, 2013
    Publication date: March 5, 2015
    Inventors: Kenichiro Otsuka, Ryuichi Nishimura, Yoshiaki Nakazawa