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    METHOD AND APPARATUS FOR PRODUCING PRESS-MOULDED ARTICLE
    1.
    发明公开
    METHOD AND APPARATUS FOR PRODUCING PRESS-MOULDED ARTICLE 审中-公开
    方法和设备生产成型制品PRESS

    公开(公告)号：EP2865459A4

    公开(公告)日：2016-03-23

    申请号：EP13807701

    申请日：2013-06-20

    申请人： NIPPON STEEL & SUMITOMO METAL CORP

    发明人： NISHIMURA RYUICHI ,  OTSUKA KENICHIRO ,  NAKAZAWA YOSHIAKI ,  MASUO YOSHIHIKO ,  SUZUKI TOSHIYA ,  IKEDA YOSHIYUKI

    IPC分类号： B21D22/26 ,  B21D5/01 ,  B21D53/88

    CPC分类号： B21D17/02 ,  B21D5/01 ,  B21D22/26 ,  B21D53/88 ,  B21J5/12 ,  B21J13/02

    摘要： 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). It is thereby possible to surely form 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.