公开(公告)号：US20110179845A1

公开(公告)日：2011-07-28

申请号：US12982074

申请日：2010-12-30

申请人： Kazuhiro MITSUKAWA ,  Shigenari TAKIGIRI ,  Shigenobu FURUKAWA

发明人： Kazuhiro MITSUKAWA ,  Shigenari TAKIGIRI ,  Shigenobu FURUKAWA

IPC分类号： B21D5/12

CPC分类号： B21C37/0803 ,  B21C37/0818 ,  F28D1/0391

摘要： A method of producing a flat tube T by bending a band-like material M to be worked, wherein the material M to be worked is pre-bent to form a pre-formed groove Md in the material M along the longitudinal center axis thereof. Thereafter, the material M to be worked is gradually moved so that both edge portions of the material M to be worked in the lengthwise direction thereof gradually approach each other with the pre-formed groove Md as a center to form a tubular shape.

摘要翻译： 通过弯曲待加工的带状材料M来生产扁平管T的方法，其中待加工的材料M被预弯曲以在材料M中沿着其纵向中心轴线形成预成形的凹槽Md。 此后，待加工的材料M逐渐移动，使得待预加工的材料M的长度方向上的两个边缘部分以预成形的凹槽Md为中心逐渐接近以形成管状。