Prepared joint for a tube fitting
    1.
    发明授权
    Prepared joint for a tube fitting 失效
    管接头的准备接头

    公开(公告)号:US4076287A

    公开(公告)日:1978-02-28

    申请号:US739880

    申请日:1976-11-08

    摘要: An improved prepared joint is provided on a fitting for mechanically joining it to the end of a metal tube. The fitting has a grooved bore and a bore extending end portion for projecting the bore a predetermined distance beyond its grooved portion so that during radial expansion of the tube into the grooved portion the entire expanded length of the tube is fully supported within the fitting. Such support is effective in extending the useful life of the tube assembly formed by the fitting and tube by alleviating metal fatigue failures due to vibrational bending stresses in the expanded portion of the tube.

    摘要翻译: 在用于将其机械地连接到金属管的端部的配件上提供改进的制备接头。 该配件具有槽孔和孔延伸端部,用于将孔突出超过其开槽部分预定距离,使得在管径向膨胀到槽部分中,管的整个扩展长度完全支撑在配件内。 这种支撑通过减轻由于管的膨胀部分中的振动弯曲应力引起的金属疲劳失效来延长由配件和管形成的管组件的使用寿命。