我厂生产的复式齿轮(内齿与外齿、内花键与外齿)结构复杂,技术要求高,齿圈相对径向跳动量不大于0.05毫米。过去使用硬心轴定心夹具(图1),齿轮大端面支承定向,不能保证轴心线与端面垂直度,工件和心轴容易变形,产品合格率小。后来改用液压涨套夹具(图2),效果较好。夹具采用内外 I plant complex gear (internal teeth and external teeth, internal spline and external teeth) complex structure, high technical requirements, ring gear relative radial runout is not more than 0.05 mm. In the past using hard mandrel centering fixture (Figure 1), large gear bearing orientation, can not guarantee the vertical axis and the end surface, the workpiece and the mandrel easily deformed, the pass rate of the product is small. Later switched to hydraulic jig fixture (Figure 2), the effect is better. Fixture used inside and outside