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    • 10. 发明专利
    • Production of flat tube
    • 生产平面管
    • JPS59150632A
    • 1984-08-28
    • JP2274083
    • 1983-02-16
    • Hitachi Ltd
    • SATOU KAZUOUEHARA KATSUJI
    • B21C37/15B21D15/02B21D53/08
    • B21D15/02
    • PURPOSE:To produce a flat tube having excellent accuracy in the straightness in both straight pipe parts and the distance between said parts by grasping a copper U-shaped tube having a circular section between tools each having a desired flat shaped groove and compressing said tube with a pressing member having wedge surfaces. CONSTITUTION:A copper tube having a circular section is bent 180 deg. while the circular shape of the section is maintained, thereby forming a U-shaped tube 2'. The straight pipe parts of such tube 2' are grasped in the grooves of tools 4, 4' each having a groove of a desired flat section. A wedge-shaped pressing tool 5 having the same slope is forced onto the sloped outside surface of the tools 4, 4' and is pressed from above to bring both tools 4, 4' into press contact with each other thus flattening the section in the straight pipe parts of the U-shaped tube grasped thereon. The flat tube for a heat exchanger having excellent accuracy in the straightness in both straight pipe parts of the U-shaped tube and the distance between the same is produced.
    • 目的:通过抓住具有圆形截面的铜U形管来制造两个直管部分的直线度精度和两个直管部分之间的距离的扁平管,每个具有期望的平坦形状的槽的工具之间具有圆形截面,并且用 具有楔形表面的按压构件。 构成:具有圆形截面的铜管弯曲180度。 同时保持该部分的圆形,从而形成U形管2'。 这种管2'的直管部分被夹在工具4,4'的凹槽中,每个凹槽具有所需的平坦部分的凹槽。 具有相同斜率的楔形按压工具5被迫施加到工具4,4'的倾斜外表面上,并且从上方被按压以使两个工具4,4'彼此压接,从而使该部分在 U形管的直管部分被夹在其上。 制造了U型管的两个直管部的直线性精度良好的热交换器用扁平管及其间的距离。