基于有限元分析的微孔钻削测力仪研究

Study on Dynamometer of Micro—hole Drilling Based on Finite Element Method

通过分析应变式测力仪传统理论模型,设计了一种用于微小孔钻削测力仪的灵敏元件等效模型。利用有限元分析工具对测力仪灵敏元件进行了动力学和静力学分析,对测力仪的结构尺寸进行了优化设计,使测力仪的固有频率和灵敏度达到较为理想的状态。在此基础上研制了一套高灵敏度应变式微小孔钻削测力系统,通过试验验证,取得了比较理想的微小孔钻削过程力信号曲线,测力仪的测力范围、灵敏度、固有频率都达到了设计要求,可以满足实际工程应用和测试研究的需要。

This paper presented a structural model of the high sensitive micro-hole drilling dynamometer. Based on the model and static analysis using finite element method, the parameters of the elastic member were modified to meet the needs of high sensitive and high inherent frequency. At the same time, a high sensitive dynamometer of micro-hole drilling was made and developed. The curves of dynamic signals were obtained from experiments of micro-hole drilling. The experimental results show that the measuring range, the sensitiveness and the inherent frequency of the dynamometer all can completely meet the design needs and the dynamometer can be applied in actual and experimentalmicro-hole drilling.