摘要
为了抑制铣削强迫振动的发生,研究了由主轴、刀柄和刀具组成的旋转系统的动态特性。以东昱精机CMV-850A型数控加工中心的旋转系统为研究对象,采用锤击法进行模态分析,利用LMS Test.lab软件拟合模态数据,得到该系统的频响函数及固有频率。在ABAQUS软件中进行动力学仿真分析,比较两种方法获得的系统固有频率和动态响应,验证所建立的动力学仿真模型的准确性。研究表明,拟合的频响函数是可信的,建立的有限元模型能准确模拟铣削系统的动态特性。
To suppress the occurrence of the forced vibration in milling, a study on the dynamic characteristics of the rotating system which consists of spindle, holder and tools was carried out. The experimental modal analysis on a CNC ma- chining center CMV -850A was conducted using hammer-hitting method, and its frequency response function and natural frequencies were obtained employing the LMS Test. lab software. Moreover, a dynamic model was established in the ABAQUS software and its feasibility was validated based on the simulation and experimental results. All the above jobs proved that the frequency response function fitting is credible and the finite element model is according with the dynamic characteristics in milling.
出处
《工具技术》
北大核心
2016年第9期20-23,共4页
Tool Engineering
关键词
铣削
动态特性
模态分析
有限元分析
milling
dynamic characteristics
modal analysis
finite element