Mandrel rod for pipe rolling mills
    4.
    发明授权
    Mandrel rod for pipe rolling mills 失效
    管轧机心轴

    公开(公告)号:US4956988A

    公开(公告)日:1990-09-18

    申请号:US396917

    申请日:1989-08-22

    IPC分类号: B21B25/00

    CPC分类号: B21B25/00

    摘要: Mandrel rod (1) for pipe rolling mills, in which hollow billet (5) is rolled on mandrel rod (1), consists of two pipes (2, 3) lying inside one another. Annular gap (4) between pipes (2, 3) is filled with a thermosetting plastic, whose coefficient of expansion is selected large enough so that the thermosetting plastic completely fills annular gap (4), even with temperature differences, between pipes (2, 3).

    摘要翻译: 中空坯料(5)在芯棒(1)上轧制的管轧机的心轴(1)由彼此相对的两个管道(2,3)组成。 在管道(2,3)之间的环形间隙(4)填充有热固性塑料,其膨胀系数被选择得足够大,使得热固性塑料甚至在温度差异之间完全填充环形间隙(4) 3)。