以解析几何方法,对光杆排线机构中的转环的设计,进行探讨.为使光杆与转环颈部保持一点接触,在光杆直径确定的条件下,转环颈部的内径取决于最大偏转角.与此同时,对V形转环内腔而言,其锥角必须大于理论最小锥角,且与转环的径宽比和最大偏转角有关;对子双曲面内腔,其母线的偏角仅取决于最大偏转角.由于双曲面内腔磨制工艺性好、磨削量小和内腔颈部的曲率半径远比V形腔大,故比V形内腔的转环优越. In order to make the polished rod and the rotating ring keep a little contact with the neck of the rotating ring, the inner diameter of the neck of the rotating ring depends on the maximum deflection In the meantime, the cone angle must be greater than the theoretical minimum cone angle for the V-turn inner cavity, and is related to the aspect ratio and the maximum deflection angle of the swivel; for the hypoid cavity, Declination depends only on the maximum deflection angle.Because the hyperboloid cavity grinding process is good, the amount of grinding is small and the radius of curvature of the cavity neck is much larger than the V-shaped cavity, it is superior to the V-shaped cavity of the rotating ring.