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    • 4. 发明专利
    • Roll-forming method and device of flattened tube, and flattened tube
    • 轧制成型方法和扁平管和扁平管的装置
    • JP2007275983A
    • 2007-10-25
    • JP2006109445
    • 2006-04-12
    • Denso Corp株式会社デンソー
    • TANIYAMA TOSHIHIRO
    • B21D53/04B21D5/08F28F1/02
    • B21D5/10B21C37/151
    • PROBLEM TO BE SOLVED: To provide a roll-forming method and device capable of reducing a recessed part produced at the root of a turn-up rib at the center in a flattened tube having an approximately θ-shaped sectional shape.
      SOLUTION: The roll-forming method of the flattened tube (1) comprises a forming process of forming a projecting part (72) of an approximately isosceles triangle shape having roundness at an apex angle part from a projecting part (71) of an approximately isosceles trapezoidal shape and a roll-forming process of forming an hairpin-shaped projecting part (73) having a hollow part (73a) on a front end side in tight contact with a base end side by adhering only the base end sides of the opposed two sides of the projecting part (72) of the approximately isosceles triangle shape having the roundness at the apex angle part allowing the hollow part (73a) to remain.
      COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供一种能够减小在具有大致θ形截面形状的扁平管的中心处的上翻肋的根部处产生的凹部的辊形成方法和装置。 解决方案:扁平管(1)的卷绕成形方法包括:成形工艺,其形成具有近似等腰三角形的突出部分(72),其具有在顶点部分处具有圆锥度的突出部分(71),该突出部分 大致等腰梯形形状和辊形成工序,其通过仅将基端侧(73a)的基端侧粘合,形成具有与前端侧紧密接触的前端侧的中空部(73a)的发夹状突出部(73) 近似等腰三角形的突出部分(72)的相对的两侧具有允许中空部分(73a)保留的顶角部分的圆度。 版权所有(C)2008,JPO&INPIT