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    Method for maufacturing welded pipes
    3.
    发明公开
    Method for maufacturing welded pipes 失效
    Verfahren zur Herstellung geschweisster Rohre。

    公开(公告)号：EP0243533A1

    公开(公告)日：1987-11-04

    申请号：EP86111988.1

    申请日：1983-05-30

    申请人： KAWASAKI JUKOGYO KABUSHIKI KAISHA

    发明人： Matsui, Shigetomo ,  Hasegawa, Hisao

    IPC分类号： B21C37/08

    CPC分类号： B21C37/08 ,  B21C37/0822 ,  B23K13/025 ,  B23K20/04 ,  B23K20/24 ,  B23K31/027 ,  C21D9/52

    摘要： During the process for bending the strip (1) gradually into a tubular form (10) or during the process in which the edges (7) of the strip are held in abutment against each other, the strip except its portions of the edges (7) is substantially or partially heated so that the strip except its portions of the edges is subjected to compressive stress while the portions of the edges are subjected to tensile stress, and under these conditions the edges are welded together.

    摘要翻译： 在将条带（1）逐渐变成管状（10）或在条带的边缘（7）保持彼此抵靠的过程中的过程中，条带除了其边缘部分（7） ）基本上或部分地被加热，使得除了其边缘部分之外的条带受到压缩应力，同时边缘的部分受到拉伸应力，并且在这些条件下，边缘被焊接在一起。

    Method for manufacturing welded pipes
    4.
    发明公开
    Method for manufacturing welded pipes 失效
    Verfahren zur Herstellung geschweisster Rohre。

    公开(公告)号：EP0126795A1

    公开(公告)日：1984-12-05

    申请号：EP83105334.3

    申请日：1983-05-30

    申请人： KAWASAKI JUKOGYO KABUSHIKI KAISHA

    发明人： Matsui, Shigetomo ,  Hasegawa, Hisao

    IPC分类号： B21C37/08

    CPC分类号： B21C37/0822 ,  B21C37/08 ,  B23K13/025 ,  B23K31/027

    摘要： In the manufacture of welded pipes, edge buckling or waving of the strip (1) is prevented by heating. In one method, during the process for bending the strip (1) into a tubular form (10), the edges (7) of the strip (1) are heated so that tensile stress exerted thereon is reduced to a minimum and, thereafter, before the edges (7) are abutted against each other, the strip is wholly heated so that the compressive stress exerted on the edges is reduced to a minimum. According to another mode, during the process for bending the strip (1) gradually into a tubular form (10) or during the process in which the edges (7) of the strip are held in abutment against each other, the strip except its portions of the edges (7) is substantially or partially heated so that the strip except its portions of the edges is subjected to compressive stress while the portions of the edges are subjected to tensile stress, and under these conditions the edges are welded together.

    摘要翻译： 在焊接管的制造中，通过加热来防止带（1）的边缘弯曲或波动。 在一种方法中，在将条带（1）弯曲成管状（10）的过程中，条带（1）的边缘（7）被加热，使得施加在其上的拉伸应力减小到最小， 在边缘（7）彼此抵靠之前，条带被完全加热，使得施加在边缘上的压缩应力减小到最小。 根据另一种模式，在将带材（1）逐渐变成管状（10）或在条带的边缘（7）保持彼此抵靠的过程中的过程中，条带除了其部分 的边缘（7）基本上或部分地被加热，使得除了其边缘部分之外的条带受到压缩应力，同时边缘部分受到拉伸应力，并且在这些条件下，边缘被焊接在一起。