大型客机上活动面的铰链特别长,铰链孔特别小,而且同心度要求高。如某机活动面最长铰链尺寸(见图1),总长1760毫米,铰链孔径φ2.6毫米,铰链孔同心度误差不大于0.3毫米/米。这种长铰链小孔的钻削和铰孔,一直是一项比较困难的工作。 Large passenger plane hinge on the moving surface particularly long, particularly small hinge hole, and concentricity requirements. For example, the longest hinge size (see Figure 1) of a moving plane of a certain machine has a total length of 1760 mm, a hinge aperture of φ2.6 mm, and a concentricity error of a hinge hole of not more than 0.3 mm / m. This long hinge hole drilling and reaming, has been a more difficult task.