高速主轴系统静止及运转状态下动力学特性对比分析

本资料包含pdf文件1个，下载需要1积分

在静止和运转状态下,高速主轴系统动力学特性会有一定程度的差异,因此,用静止状态刀尖点频响函数预测主轴系统切削加工过程中的稳定性,有时会引起较大的误差。基于此,在详细介绍高速主轴系统在运转状态下有限元建模及分析方法的基础上,以某高速主轴系统为研究对象,采用有限元法对比分析了该主轴系统静止状态、低速运转状态、高速运转状态时的固有特性和刀尖点频响函数的差异。结果表明,在低速运转状态下,该主轴系统的动力学特性同静止状态下基本相同;而在高速运转条件下,其动力学特性与静止状态下差异较大。为科学地分析同类主轴系统动力学特性和切削稳定性提供参考依据。 There is a certain degree difference between the static and operation condition for the high-speed spindle system.Therefore,large errors will be leaded to if predicting the stability of spindle system used the frequency response function（FRF） of tool tip which are gotten from static state.On the basis of introducing the modeling method of finite element for the spindle system,a high-speed spindle system is modeled and its nature characteristics and FRF of tool tip are solved,when the spindle system is in static,low and high rotate state.Corresponding to the three conditions,nature characteristics and FRF of tool tip are compared.The results show that,at low speed state,the dynamics of the spindle system is the same as stationary state,and in high speed conditions,the dynamics is quite different with the static state.It can also provide a reference to analyze dynamics and stability for similar spindle system.