典型零件形体的热变形模型及其有限元仿真

The Thermal Deformation Model of the Typical Parts and Finite Element Simulation

随着精密技术的精度不断提高,温度变化引起零件形变带来的影响不容忽视,为了解决此问题,根据弹性力学和热力学理论,建立了典型零件形体的热变形模型,利用ANSYS有限元分析软件对典型零件形体的热变形误差及其分布进行了仿真,并进行了模型实验验证,给出了实例应用的分析,说明了热变形模型在公差与配合中的应用。结果表明,所建立的模型考虑了热应力的影响,相对于传统计算方法更加合理可靠,为合理进行零件的公差与配合设计提供了理论依据和参考。

With the increasing of the accuracy of precision technology,the effects of temperature changes cannot be ignored.In order to solve this problem,based on the theory of elastic mechanics and thermodynamics,the thermal deformation model of typical parts form is established. Based on the ANSYS finite element analysis software,the errors and distribution simulation of thermal deformation of typical parts form is proceeded and the model is verified by experiment. At last,the example application is given,illustrating the application of the thermal deformation model in tolerance and cooperation. The results show that the built model considering the influence of thermal stress is more reasonable,compared with the traditional calculation method,providing the theoretical basis for the reasonable design of parts of tolerance and fitting.