轴套形状误差的过盈配合映射研究

Research on Interference Fit Mapping for Form Error of Axis-sleeve Parts

过盈联接大量应用于轴承与轴类的联接中。对于精密类仪器,分析机械加工形状误差对过盈配合精度的影响十分重要。使用有限元分析软件ANSYS对带有形状误差的轴套过盈配合进行有限元仿真。分析轴套形状误差、过盈量与套圈外径的映射关系。结果表明:在过盈量与误差值一定,轴与套圈内径有相同的误差棱圆边数时,无量纲化的变形量幅值最小;在过盈量与形状误差一定,轴与套圈内径的误差值相同时,无量纲化的变形量幅值最小,趋近于零;在误差形状和误差值不变的情况下,随着过盈量的增大,无量纲化的变形量幅值呈现递减趋势。

Interference fits are widely used in the connection of bearing and shaft. For precision instru- ments, analyzing the influence of interference fit precision caused by the machining form error is vital. ANSYS which is a sort of finite element analysis software was put into used to the axis-sleeve interfer- ence fit with form error for finite element simulation. And then the mapping relationship of the shaft sleeve shape error, magnitude of interference and the quantity of outer ring was analyzed. The results showed that the dimensionless deformation amplitude is minimum when the magnitude of interference and error value are constant, shaft and axis-sleeve.inner diameter have the same number of error round edge; the dimensionless deformation amplitude is minimum which is close to zero when the magnitude of inter- ference and form error are constant, shaft and axis-sleeve inner diameter have the same error value; when the error shape and error value are constant, with the increase of the amount of interference, the dimen- sionless deformation amplitude presents decreasing trend.