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1. 发明公开

EP4227016A1 METHOD FOR MANUFACTURING PRESS-MOLDED ITEM, AND PRESS LINE 审中-实审
公开(公告)号：EP4227016A1
公开(公告)日：2023-08-16
申请号：EP21877763.9
申请日：2021-10-08
申请人： NIPPON STEEL CORPORATION
发明人： SUGAWARA, Minoru , YAMAMOTO, Takashi , TANAKA, Yasuharu , MIYAGI, Takashi , OGAWA, Misao , NATORI, Junki
IPC分类号： B21D22/26 , B21D24/00
摘要： 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).

2. 发明公开

EP3915694A1 PRESS MOLDING METHOD AND PRESS MACHINE 有权
公开(公告)号：EP3915694A1
公开(公告)日：2021-12-01
申请号：EP20746008.0
申请日：2020-01-24
申请人： NIPPON STEEL CORPORATION
发明人： SUGAWARA, Minoru , TANAKA, Yasuharu , MIYAGI, Takashi , OGAWA, Misao , NATORI, Junki
IPC分类号： B21D22/26 , B21D24/00 , B21D24/04
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.

3. 发明授权

EP3441153B1 METHOD FOR PRODUCING PRESS-MOLDED ARTICLE AND PRODUCTION LINE THEREOF 有权转让
公开(公告)号：EP3441153B1
公开(公告)日：2020-09-16
申请号：EP17779108.4
申请日：2017-04-03
申请人： Nippon Steel Corporation
发明人： NATORI, Junki , NAKAZAWA, Yoshiaki , NISHIMURA, Ryuichi , OGAWA, Keiji
IPC分类号： B21D22/26 , B21D22/20 , B21D24/06 , B21D5/01

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