原理是利用两个气胀轴的同心圆筒，封住两端组成一个圆筒形的空腔，用液压油把圆筒的其中一个给充满，并且对油液进行施加一定的压力，这个压力就会用相等的数值传到油腔的每一个部位。济宁工一机械这两个同心的圆筒的外筒壁较薄，受到压力后，就会向外膨胀，根据这个变形的薄壁，就可以实现对内孔的胀紧夹持和对外径的胀紧夹持。这个时候的薄壁其实是每一处都均匀着承受着油压，济宁工一机械因此对零件的内孔和外径进行涨紧后，它的夹持精度就会非常高，济宁工一机械 液压dao柄就是根据这个原理开发出来，并成功地应用到数控机械加工制造行业。

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