发明公开
EP2202011A1 MOLD FOR PRESS APPARATUS, AND OPEN-DRAWING METHOD 有权
FORMFÜREINE PRESSVORRICHTUNG SOWIE PRESSENBEARBEITUNGSVERFAHREN UND OPEN-DRAWING-VERFAHREN

  • 专利标题: MOLD FOR PRESS APPARATUS, AND OPEN-DRAWING METHOD
  • 专利标题(中): FORMFÜREINE PRESSVORRICHTUNG SOWIE PRESSENBEARBEITUNGSVERFAHREN UND OPEN-DRAWING-VERFAHREN
  • 申请号: EP08855410.0
    申请日: 2008-11-11
  • 公开(公告)号: EP2202011A1
    公开(公告)日: 2010-06-30
  • 发明人: KUBO, Masao
  • 申请人: Toyota Jidosha Kabushiki Kaisha
  • 申请人地址: 1 Toyota-cho Toyota-shi, Aichi-ken 471-8571 JP
  • 专利权人: Toyota Jidosha Kabushiki Kaisha
  • 当前专利权人: Toyota Jidosha Kabushiki Kaisha
  • 当前专利权人地址: 1 Toyota-cho Toyota-shi, Aichi-ken 471-8571 JP
  • 代理机构: Kuhnen & Wacker
  • 优先权: JP2007310965 20071130
  • 国际公布: WO2009069461 20090604
  • 主分类号: B21D24/00
  • IPC分类号: B21D24/00 B21D22/22
MOLD FOR PRESS APPARATUS, AND OPEN-DRAWING METHOD
摘要:
This aims to provide a press-apparatus mold capable of improving the yield of a blank while preventing wrinkles and cracks in a finished product, and an open-drawing method according to the press-apparatus mold. Within a range corresponding to the excess thickness portion (6) of a blank (4), the width of a punch (3) is gradually enlarged toward the end of the punch (3), thereby to curve boundaries (or the punch ridgelines (3d and 3e)) formed by the upper face (3a) and the side faces (3b and 3c) of the punch (3), toward the end of the punch (3) and to the widthwise outer sides of the punch (3). At the same time, the width of the recess (1a) of a die (1) is gradually enlarged toward the end of the recess (1a), thereby to curve a drawing profile (8) set by the punch (3) and the die (1), toward the ends of the punch (3) and the recess (1a) and to the widthwise outer sides of the punch (3) and the recess (1a).
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