精密卧式加工中心转台的模态与可靠性分析

Modal and reliability analysis of the turntable of precision horizontal machining center

卧式加工中心转台是加工中心的关键部件之一,其可靠性直接影响加工中心的性能。对某机床厂研发的THM46100卧式加工中心的转台进行有限元模态分析与模态试验。通过对其固有频率的试验值与计算值进行误差分析和相关性分析,验证建立的有限元模型的准确性。对准确的有限元模型进行结构分析,并将结果导入到疲劳分析软件进行转台的疲劳寿命分析,利用疲劳分析的结果对转台的可靠度进行计算。此方法对加工中心转台的结构优化及可靠性分析具有一定的指导意义。

The turntable is one of key components of horizontal machining center,and the performance of machining center is directly affected by the reliability of the turntable.Finite element modal analysis and modal test for the turntable of THM46100 horizontal machining center is worked out,and error analysis and correlation analysis about experimental value and calculated value of the natural frequencies is finished,the accuracy of the finite element model is verified.Structural analysis of the finite element model is worked out,and analysis results are imported into the fatigue analysis software and fatigue life of the turntable is analyzed,the reliability of the turntable is calculated by the results of fatigue analysis.This method has a guiding significance for structure optimization and reliability analysis of turntable of machining center.