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    • 14. 发明授权
    • Tube rolling mill employing a tapered mandrel and a cluster of rolls that each have specially designed tube contacting grooves
    • 管道滚压铣刀采用锥形手柄和每个具有特殊设计的管道接触沟槽的滚筒
    • US3688540A
    • 1972-09-05
    • US3688540D
    • 1970-07-07
    • SUPERIOR TUBE CO
    • RUSSEL RICHARD E
    • B21B21/00B21B23/00B21B17/06
    • B21B23/00B21B21/005
    • A tube rolling mill having two sets of three rolls each which are reciprocatingly driven along a length of a tube supported by a tapered mandrel. Each roll is forced against the tube by its individual cams each having a surface with one or more tapers which are related to multiple mandrel taper in a manner to provide reduction in both wall thickness and inside diameter of the tube. Each roll is provided with a tube contacting groove having in cross-section a central arc with a radius of curvature substantially equal to the smallest radius of that portion of the tube contacted by the roll, with either side of the central arc joined by lines tangent thereto with large radii of curvature chosen so that each roll contacts a tube in two zones around its circumference. The rolls are pressed against the tube upon the urging of the tapered cam surface against a roll trunnion. The radius of the trunnion is carefully chosen to control longitudinal forces transferred to the tube by the roll.
    • 一种具有两组三辊的管式轧机,每组辊沿着由锥形心轴支撑的管的长度往复驱动。 每个辊通过其各个凸轮被压靠在管上,每个凸轮具有一个表面,该表面具有一个或多个与多个心轴锥形有关的锥度,以提供管的壁厚度和内径的减小。 每个卷筒都设有管接触槽,其横截面为中心弧,其曲率半径基本上等于与辊接触的管的该部分的最小半径,中心弧的任一侧通过线切线 其具有大的半径曲率,使得每个辊在其圆周周围的两个区域中接触管。 当锥形凸轮表面抵靠辊耳轴的推动时,辊被压靠在管上。 仔细选择耳轴的半径以控制由辊转移到管的纵向力。