Patents by Inventor Misao Ogawa
Misao Ogawa 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: 12202025Abstract: This press-formed article includes: a top sheet portion; a sidewall continuing to the top sheet portion via a convex ridge line portion; a flange continuing to the sidewall via a concaved ridge line portion; and an outward flange continuing from an edge portion of the top sheet portion to an edge portion of the flange, via an edge portion of the convex ridge line portion, an edge portion of the sidewall, and an edge portion of the concaved ridge line portion, wherein in the same unit, an average thickness TAve, a minimum thickness TMin, and a maximum thickness TMax of the outward flange satisfy Equation 1 and Equation 2. 0.8×TAve?TMin<TAve??(Equation 1) TAve<TMax?1.Type: GrantFiled: September 7, 2023Date of Patent: January 21, 2025Assignee: NIPPON STEEL CORPORATIONInventors: Yasuharu Tanaka, Misao Ogawa, Takashi Miyagi, Toshimitsu Aso, Hiroyuki Tanoue, Ryo Kuroda
-
Patent number: 12070787Abstract: A press forming method includes a first step of pinching one part of a metal sheet by means of a die and a pad, and a second step of moving a punch in a direction in which the punch approaches the die relatively to perform press forming on the metal sheet. The die has a first support surface which has an edge including a curved portion. The pad has a second support surface facing the first support surface of the die. The first support surface includes a first flat portion, and a first deformation portion which protrudes or is recessed with respect to the first flat portion. The second support surface includes a second flat portion which faces the first flat portion, and a second deformation portion which is recessed or protrudes with respect to the second flat portion so as to correspond to the first deformation portion. The first deformation portion is provided on a normal line of the curved portion as viewed from a pressing direction.Type: GrantFiled: January 24, 2020Date of Patent: August 27, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Minoru Sugawara, Yasuharu Tanaka, Takashi Miyagi, Misao Ogawa, Junki Natori
-
Patent number: 11925968Abstract: A method for manufacturing a press-formed article (100) includes a first step for forming a base sheet portion, a first rising portion, and a first strip portion from a sheet-shaped workpiece having a first edge portion and a second edge portion; and a second step for forming a second rising portion by causing a strip-shaped first zone including the second edge portion to be disposed between a first upper die and a first lower die from both sides, causing a second zone adjacent to the first zone to be disposed between a second upper die and a second lower die from both sides, and moving the first upper die and the first lower die relative to the second upper die and the second lower die, wherein, in the second step, a part of the second rising portion which is connected to a vertical ridge line (108) is shear-deformed.Type: GrantFiled: September 23, 2020Date of Patent: March 12, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Ryo Kuroda, Yasuharu Tanaka, Takashi Miyagi, Misao Ogawa
-
Publication number: 20230415216Abstract: This press-formed article includes: a top sheet portion; a sidewall continuing to the top sheet portion via a convex ridge line portion; a flange continuing to the sidewall via a concaved ridge line portion; and an outward flange continuing from an edge portion of the top sheet portion to an edge portion of the flange, via an edge portion of the convex ridge line portion, an edge portion of the sidewall, and an edge portion of the concaved ridge line portion, wherein in the same unit, an average thickness TAve, a minimum thickness TMin, and a maximum thickness TMax of the outward flange satisfy Equation 1 and Equation 2. 0.8×TAve?TMin<TAve??(Equation 1) TAve<TMax<1.Type: ApplicationFiled: September 7, 2023Publication date: December 28, 2023Applicant: NIPPON STEEL CORPORATIONInventors: Yasuharu TANAKA, Misao OGAWA, Takashi MIYAGI, Toshimitsu ASO, Hiroyuki TANOUE, Ryo KURODA
-
Publication number: 20230381848Abstract: A manufacturing method of a press-formed article (200) including: press-forming a metal sheet into a preformed article (100) including a preformed bottom sheet portion (110), a first preformed standing wall portion (120a), a second preformed standing wall portion (120b), a preformed ridge portion (130) provided between the first preformed standing wall portion (120a) and the second preformed standing wall portion (120b), and a swollen portion (140) provided between the preformed bottom sheet portion (110) and the first and second preformed standing wall portions (120a) and (120b); and press-forming the preformed article (100) into a press-formed article (200) including a bottom sheet portion (210), a first standing wall portion (220a) adjacent to the bottom sheet portion (210), a second standing wall portion (220b) adjacent to the bottom sheet portion (210), and a ridge portion (230) provided between the first standing wall portion (220a) and the second standing wall portion (220b).Type: ApplicationFiled: October 8, 2021Publication date: November 30, 2023Applicant: NIPPON STEEL CORPORATIONInventors: Minoru SUGAWARA, Takashi YAMAMOTO, Yasuharu TANAKA, Takashi MIYAGI, Misao OGAWA, Junki NATORI
-
Patent number: 11806773Abstract: This press-formed article includes: a top sheet portion; a sidewall continuing to the top sheet portion via a convex ridge line portion; a flange continuing to the sidewall via a concaved ridge line portion; and an outward flange continuing from an edge portion of the top sheet portion to an edge portion of the flange, via an edge portion of the convex ridge line portion, an edge portion of the sidewall, and an edge portion of the concaved ridge line portion, wherein in the same unit, an average thickness TAve, a minimum thickness TMin, and a maximum thickness TMax of the outward flange satisfy Equation 1 and Equation 2. 0.8×TAve?TMin<TAve??(Equation 1) TAve<TMax?1.Type: GrantFiled: June 25, 2021Date of Patent: November 7, 2023Assignee: NIPPON STEEL CORPORATIONInventors: Yasuharu Tanaka, Misao Ogawa, Takashi Miyagi, Toshimitsu Aso, Hiroyuki Tanoue, Ryo Kuroda
-
Publication number: 20220371070Abstract: A method for manufacturing a press-formed article (100) includes a first step for forming a base sheet portion, a first rising portion, and a first strip portion from a sheet-shaped workpiece having a first edge portion and a second edge portion; and a second step for forming a second rising portion by causing a strip-shaped first zone including the second edge portion to be disposed between a first upper die and a first lower die from both sides, causing a second zone adjacent to the first zone to be disposed between a second upper die and a second lower die from both sides, and moving the first upper die and the first lower die relative to the second upper die and the second lower die, wherein, in the second step, a part of the second rising portion which is connected to a vertical ridge line (108) is shear-deformed.Type: ApplicationFiled: September 23, 2020Publication date: November 24, 2022Applicant: NIPPON STEEL CORPORATIONInventors: Ryo KURODA, Yasuharu TANAKA, Takashi MIYAGI, Misao OGAWA
-
Publication number: 20220097116Abstract: A press forming method includes a first step of pinching one part of a metal sheet by means of a die and a pad, and a second step of moving a punch in a direction in which the punch approaches the die relatively to perform press forming on the metal sheet. The die has a first support surface which has an edge including a curved portion. The pad has a second support surface facing the first support surface of the die. The first support surface includes a first flat portion, and a first deformation portion which protrudes or is recessed with respect to the first flat portion. The second support surface includes a second flat portion which faces the first flat portion, and a second deformation portion which is recessed or protrudes with respect to the second flat portion so as to correspond to the first deformation portion. The first deformation portion is provided on a normal line of the curved portion as viewed from a pressing direction.Type: ApplicationFiled: January 24, 2020Publication date: March 31, 2022Applicant: NIPPON STEEL CORPORATIONInventors: Minoru SUGAWARA, Yasuharu TANAKA, Takashi MIYAGI, Misao OGAWA, Junki NATORI
-
Patent number: 11270047Abstract: A method of forming a metal sheet into a target shape by press-forming, such that the metal sheet is formed into an intermediate shape that is different from the target shape and then the target shape is formed from the intermediate shape, the method includes: when forming the intermediate shape from the metal sheet, forming the intermediate shape by forming a first region including at least a portion at which a ratio of sheet thickness reduction from the metal sheet is larger when the target shape is formed via the intermediate shape than when the target shape is formed directly from the metal sheet.Type: GrantFiled: December 25, 2017Date of Patent: March 8, 2022Assignee: NIPPON STEEL CORPORATIONInventors: Yasuharu Tanaka, Takashi Miyagi, Misao Ogawa
-
Publication number: 20210323044Abstract: This press-formed article includes: a top sheet portion; a sidewall continuing to the top sheet portion via a convex ridge line portion; a flange continuing to the sidewall via a concaved ridge line portion; and an outward flange continuing from an edge portion of the top sheet portion to an edge portion of the flange, via an edge portion of the convex ridge line portion, an edge portion of the sidewall, and an edge portion of the concaved ridge line portion, wherein in the same unit, an average thickness TAve, a minimum thickness TMin, and a maximum thickness TMax of the outward flange satisfy Equation 1 and Equation 2. 0.8×TAve?TMin<TAve ??(Equation 1) TAve<TMax?1.Type: ApplicationFiled: June 25, 2021Publication date: October 21, 2021Applicant: NIPPON STEEL CORPORATIONInventors: Yasuharu TANAKA, Misao OGAWA, Takashi MIYAGI, Toshimitsu ASO, Hiroyuki TANOUE, Ryo KURODA
-
Patent number: 11135633Abstract: A method or apparatus to produce an L-shaped pressed component includes, where a portion of a blank, having tensile strength of 1180 MPa or more, is held in a state of being clamped by a blank holder and a die, and a portion of the blank, to be formed into a top plate is held in a state of being clamped by a pad and a punch; the second step where a vertical wall, a concave ridge and a flange on the inner side of a curved portion are formed by, bend forming with a bending die, forming one, two or more material inflow promoting portion; and the third step where the die is moved in a direction toward a side where the blank holder is disposed to form a vertical wall, a concave ridge, and a flange on the outer side of the curved portion by draw forming.Type: GrantFiled: June 26, 2017Date of Patent: October 5, 2021Assignee: NIPPON STEEL CORPORATIONInventors: Yasuharu Tanaka, Toshimitsu Aso, Takashi Miyagi, Misao Ogawa, Shinobu Yamamoto, Keita Ikegami
-
Patent number: 11097331Abstract: This press-formed article includes: a top sheet portion; a sidewall continuing to the top sheet portion via a convex ridge line portion; a flange continuing to the sidewall via a concaved ridge line portion; and an outward flange continuing from an edge portion of the top sheet portion to an edge portion of the flange, via an edge portion of the convex ridge line portion, an edge portion of the sidewall, and an edge portion of the concaved ridge line portion, wherein in the same unit, an average thickness TAve, a minimum thickness TMin, and a maximum thickness TMax of the outward flange satisfy Equation 1 and Equation 2. 0.8×TAve?TMin<TAve??(Equation 1) TAve<TMax?1.2×TAve??(Equation 2).Type: GrantFiled: June 1, 2016Date of Patent: August 24, 2021Assignee: NIPPON STEEL CORPORATIONInventors: Yasuharu Tanaka, Misao Ogawa, Takashi Miyagi, Toshimitsu Aso, Hiroyuki Tanoue, Ryo Kuroda
-
Patent number: 11059085Abstract: The manufacturing method includes a first step in which a pad holding state is established and a second step in which pad draw forming is performed after the first step is completed.Type: GrantFiled: October 5, 2017Date of Patent: July 13, 2021Assignee: NIPPON STEEL CORPORATIONInventors: Takashi Miyagi, Yasuharu Tanaka, Misao Ogawa, Toshimitsu Aso, Takashi Yamamoto
-
Patent number: 10946427Abstract: A blank that is a material for an elongated press formed article having a substantially hat shaped lateral cross-section profile including a top plate section, a ridge line section, a flange section, and vertical wall section, and configured with a first portion in which the top plate section has a fixed width, and a second portion including a curved portion in which the top plate section exhibits an L-shape in plan view due to the vertical wall section, the ridge line section, and the flange section curving along with the width of the top plate section gradually increasing. The blank has a shape of an opened-out shape of the press formed article, additionally with a first recess, a protrusion, and a second recess provided to an edge of an excess portion additionally provided at an edge of a location that will form the flange section configuring the curved portion.Type: GrantFiled: May 13, 2014Date of Patent: March 16, 2021Assignee: NIPPON STEEL CORPORATIONInventors: Takashi Miyagi, Kei Misawa, Yasuharu Tanaka, Misao Ogawa, Toshimitsu Aso
-
Patent number: 10828685Abstract: A blank for forming a pressed article, the blank including a flat pattern edge configuring an edge on one length direction side of the blank, and an excess portion formed at the flat pattern edge. An edge of the excess portion includes a first convex portion that protrudes toward the one length direction side of the blank with respect to the flat pattern edge, a first concave portion that is adjacent to the first convex portion at a width direction outer side of the blank, that is formed in a concave shape, and that connects the flat pattern edge and the first convex portion together, and a second concave portion that is adjacent to the first convex portion at a width direction inner side of the blank, that is formed in a concave shape, and that connects the flat pattern edge and the first convex portion together.Type: GrantFiled: May 8, 2015Date of Patent: November 10, 2020Assignee: NIPPON STEEL CORPORATIONInventors: Takashi Miyagi, Yasuharu Tanaka, Misao Ogawa, Toshimitsu Aso
-
Publication number: 20200311325Abstract: A method of forming a metal sheet into a target shape by press-forming, such that the metal sheet is formed into an intermediate shape that is different from the target shape and then the target shape is formed from the intermediate shape, the method includes: when forming the intermediate shape from the metal sheet, forming the intermediate shape by forming a first region including at least a portion at which a ratio of sheet thickness reduction from the metal sheet is larger when the target shape is formed via the intermediate shape than when the target shape is formed directly from the metal sheet.Type: ApplicationFiled: December 25, 2017Publication date: October 1, 2020Applicant: NIPPON STEEL CORPORATIONInventors: Yasuharu TANAKA, Takashi MIYAGI, Misao OGAWA
-
Patent number: 10730092Abstract: A pressed article manufacturing method employing a press mold equipped with a punch and a die to manufacture a pressed article including a first wall, a second wall extending out from an end portion on at least one length direction side of the first wall toward a back face side of the first wall, and a third wall extending out from a leading end portion of the second wall toward a front face side of the second wall. The manufacturing method includes using the punch and the die to apply pressure to and grip a portion on a base end side of the second wall in a first warp shape in which the base end side portion is warped so as to be convex on a back face side of the second wall as viewed in lateral cross-section in a state prior to demolding from the press mold.Type: GrantFiled: June 26, 2015Date of Patent: August 4, 2020Assignee: NIPPON STEEL CORPORATIONInventors: Takashi Miyagi, Misao Ogawa, Toshimitsu Aso, Yasuharu Tanaka, Keiichi Murakami
-
Patent number: 10710136Abstract: This press-forming apparatus is a press-forming apparatus for manufacturing a press-formed article from a workpiece sheet by moving at least one of a die and a punch so as to be close to each other in a press-forming direction, the press-formed article having a top portion, a first sidewall portion, and a second sidewall portion, the first sidewall portion and the second sidewall portion being connected to ridge portions formed on both edges of the top portion, wherein the die includes: a die slide; a first divisional die; a second divisional die; a second divisional die driving unit; a die pad; a die pad driving unit; an insert block; and an insert block driving unit.Type: GrantFiled: May 11, 2016Date of Patent: July 14, 2020Assignee: NIPPON STEEL CORPORATIONInventors: Misao Ogawa, Masaru Itoh, Toshiya Suzuki, Hiroyuki Tanoue, Yasuharu Tanaka
-
Patent number: 10688551Abstract: A method for manufacturing a hat-shaped cross-section component includes a gripping process, a bending and stretching process, and a bend back process. In the gripping process, a pair of vertical walls of an elongated preliminarily formed component are disposed outside of a punch, and a top plate is gripped using the punch and a pad. In the bending and stretching process, die moves toward the punch side relative to the preliminarily formed component, and the die bends and stretches the vertical walls toward the opposite side to the top plate at one side in the length direction of the preliminarily formed component. In the bend back process, a holder moves toward the pad side relative to the preliminarily formed component, and the holder bends back the vertical walls toward the top plate side at another side in the length direction of the preliminarily formed component.Type: GrantFiled: December 18, 2015Date of Patent: June 23, 2020Assignee: NIPPON STEEL CORPORATIONInventors: Toshimitsu Aso, Yasuharu Tanaka, Takashi Miyagi, Misao Ogawa, Shinobu Yamamoto
-
Publication number: 20200038931Abstract: The manufacturing method includes a first step in which a pad holding state is established and a second step in which pad draw forming is performed after the first step is completed.Type: ApplicationFiled: October 5, 2017Publication date: February 6, 2020Applicant: NIPPON STEEL CORPORATIONInventors: Takashi MIYAGI, Yasuharu TANAKA, Misao OGAWA, Toshimitsu ASO, Takashi YAMAMOTO