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1. 发明申请

US20200311325A1 METAL SHEET FORMING METHOD, INTERMEDIATE SHAPE DESIGN METHOD, METAL SHEET FORMING DIE, COMPUTER PROGRAM, AND RECORDING MEDIUM 审中-公开
公开(公告)号：US20200311325A1
公开(公告)日：2020-10-01
申请号：US16471442
申请日：2017-12-25
申请人： NIPPON STEEL CORPORATION
发明人： Yasuharu TANAKA , Takashi MIYAGI , Misao OGAWA
IPC分类号： G06F30/23 , B21D22/24
摘要： 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.

2. 发明申请

US20200290105A1 HOLD DEVICE 审中-公开
公开(公告)号：US20200290105A1
公开(公告)日：2020-09-17
申请号：US16770417
申请日：2018-12-06
申请人： NIPPON STEEL CORPORATION
发明人： Kazunori OOOKA , Toshimitsu ASO , Hiroshi YOSHIDA , Daisuke YASUFUKU , Yasuharu TANAKA , Takashi MIYAGI , Junichiro SUZUKI , Shinobu YAMAMOTO
IPC分类号： B21D24/04 , B21D5/01
摘要： A hold device is attached to press tooling. The hold device includes a distance member attached to a holder, and a moving device attached to a first die unit. The holder is provided in a movable manner with respect to a punch in a press direction, and a pad is provided in a movable manner with respect to a die in the press direction. The distance member is pivotable between a home position in which the distance member does not come into contact with the second die and a preventive position in which the distance between the pad and the holder in the press direction is prevented from being equal to or less than a predetermined distance. As the holder moves relative to the punch in the first direction, the moving device causes the distance member to pivot from the home position toward the preventive position.

3. 发明申请

US20190381553A1 PRESSED COMPONENT MANUFACTURING METHOD AND PRESS APPARATUS 审中-公开
公开(公告)号：US20190381553A1
公开(公告)日：2019-12-19
申请号：US16552845
申请日：2019-08-27
申请人： NIPPON STEEL CORPORATION
发明人： Masahiro KUBO , Hiroshi YOSHIDA , Takashi MIYAGI
IPC分类号： B21D22/26 , B21D53/88 , B21D5/00 , B21D24/04
摘要： A method for manufacturing a pressed component including an elongated top plate, a wall having one end connected to a short direction end portion of the top plate, that curves with a convex shape bowing toward an opposite side to the top plate as viewed from an upper side of the top plate, and that includes a sharp curve portion, and a flange that is connected to another end of the wall, and that extends in a plate thickness direction of the wall toward the opposite side to the top plate side. The manufacturing method includes pressing to form an intermediate formed component including a preliminary flange and pressing to deform the preliminary flange to form the preliminary flange into the flange.

4. 发明申请

US20220371070A1 METHOD FOR MANUFACTURING PRESS-FORMED ARTICLE, PRESS-FORMED ARTICLE, AND PRESS-FORMING APPARATUS 有权
公开(公告)号：US20220371070A1
公开(公告)日：2022-11-24
申请号：US17642842
申请日：2020-09-23
申请人： NIPPON STEEL CORPORATION
发明人： Ryo KURODA , Yasuharu TANAKA , Takashi MIYAGI , Misao OGAWA
IPC分类号： B21D22/26 , B21D37/08
摘要： 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.

5. 发明申请

US20220097116A1 PRESS FORMING METHOD AND PRESS APPARATUS 有权
公开(公告)号：US20220097116A1
公开(公告)日：2022-03-31
申请号：US17425614
申请日：2020-01-24
申请人： NIPPON STEEL CORPORATION
发明人： Minoru SUGAWARA , Yasuharu TANAKA , Takashi MIYAGI , Misao OGAWA , Junki NATORI
IPC分类号： B21D22/22 , B21D24/04 , B21D19/08
摘要： 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. When a space between the first deformation portion and the second deformation portion is assumed to be a deformation space, in the second step, press forming is performed so that portions of the metal sheet which are on both sides of the deformation space flow into the deformation space, and the metal sheet deforms along the first deformation portion and the second deformation portion in the deformation space.

6. 发明申请

US20210323044A1 PRESS-FORMED ARTICLE, PRESS-FORMING METHOD, AND PRESS-FORMING APPARATUS 有权
公开(公告)号：US20210323044A1
公开(公告)日：2021-10-21
申请号：US17359040
申请日：2021-06-25
申请人： NIPPON STEEL CORPORATION
发明人： Yasuharu TANAKA , Misao OGAWA , Takashi MIYAGI , Toshimitsu ASO , Hiroyuki TANOUE , Ryo KURODA
IPC分类号： B21D28/26 , B21D22/02 , B21D24/16 , B21D22/20 , B21D22/26 , B21D53/88
摘要： 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

7. 发明申请

US20200038931A1 MANUFACTURING METHOD AND MANUFACTURING APPARATUS FOR PRESS-FORMED ARTICLE 审中-公开
公开(公告)号：US20200038931A1
公开(公告)日：2020-02-06
申请号：US16339496
申请日：2017-10-05
申请人： NIPPON STEEL CORPORATION
发明人： Takashi MIYAGI , Yasuharu TANAKA , Misao OGAWA , Toshimitsu ASO , Takashi YAMAMOTO
IPC分类号： B21D5/01 , B21D22/26 , B21D24/10
摘要： 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. In the pad holding state, (a) a part of a blank 15 to be formed into a top plate 21 is held between a pad 13 and a punch 11, and a part of the blank 15 to be formed into a flange 25 is held between a die 14 and a blank holder 12, (b) in a specific press directional cross section of a part of the blank 15 to be formed into a first part, the position of the contacting surface of the blank holder 12 that makes contact with the blank 15 in the direction of pressing is located toward the punch 11 in the direction of arrangement of the pad 13 and the punch 11, compared with the position of the contacting surface of the pad 13 that makes contact with the blank 15 in the direction of pressing, (c) a vertically-reversing cross-sectional angle is more than 0° and equal to or less than 80°, and (d) in a press directional cross section that is different from the specific press directional cross section, the position of the contacting surface of the pad 13 that makes contact with the blank 15 in the direction of the pressing is located toward the pad 13 in the direction of the arrangement, compared with the position of the contacting surface of the blank holder 12 that makes contact with the blank 15 in the direction of pressing.

8. 发明申请

US20210178446A1 PRESS TOOLING 有权
公开(公告)号：US20210178446A1
公开(公告)日：2021-06-17
申请号：US16770498
申请日：2018-12-06
申请人： NIPPON STEEL CORPORATION
发明人： Kazunori OOOKA , Toshimitsu ASO , Hiroshi YOSHIDA , Daisuke YASUFUKU , Yasuharu TANAKA , Takashi MIYAGI , Junichiro SUZUKI , Shinobu YAMAMOTO
IPC分类号： B21D24/12 , B21D5/01 , B21D22/20 , B21D24/04 , B21D37/12
摘要： A press tooling includes a distance member pivotably supported by a holder; and a moving device provided on a first die unit. The holder is provided in a movable manner with respect to a punch in a press direction, and a pad is provided in a movable manner with respect to a die in the press direction. The distance member is pivotable between a home position in which the distance member does not come into contact with the second die and a preventive position in which the distance between the pad and the holder in the press direction is prevented from being equal to or less than a predetermined distance. As the holder moves relative to the punch in the first direction, the moving device causes the distance member to pivot from the home position toward the preventive position.

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