轴瓦定位唇专用铣床铣削杆振动特性分析

The Vibration Characteristics Analysis of the Bearing Positioning Lip Special Milling Machine of Milling Rod

针对轴瓦定位唇专用铣床铣削杆在工作过程中产生振动的问题,基于刀具铣削理论与罚函数算法,采用有限元建模方法对铣刀杆工作状况合理简化并施加合理约束,建立了铣刀杆的有限元模型并进行模态分析,模态分析得到的铣削杆前5阶固有频率与实验方法获得的数据在误差允许范围内.通过对铣削杆前5阶模态的分析,发现铣削主轴两端采用轴承支撑,铣削过程中变形小,而铣削杆为悬壁梁支撑,在二、三阶固有频率下发生大变形,对轴瓦定位唇铣削精确度影响较大.

In the process when vibration problem occurs while the engine beating locating connector dedicated milling machine and milling rod is working, we simplify the working conditions of the milling cutter rod and impose some appropriate constraints by finite element modeling on the basis of cutter milling theory and penalty function theory, establishing a finite element model of milling cutter rod to conduct modal analysis, and both the first 5 order process is obtained when the beating supports are employed in both ends of the milling spindle beatings. However, large deformation appearance has an impact on the accuracy of the engine bearing locating connector when the cantilever beam support is employed in milling cutter spindler in the second or third order natural frequency.