论文部分内容阅读
以机械加工中常用车床 CA6140为研究对象，分别采用基于 ANSYS 的有限元法和实验法对其主轴进行了振动模态与频率响应分析，并对两者的计算结果进行了对比分析，验证了ANSYS 数值仿真的准确性。数值仿真和实验结果表明：主轴在一阶频率和五阶频率处容易发生共振，但未达到共振，且低阶频率要比高阶频率对主轴的振动影响大；通过实验得出，主轴在工作状态下的最大振动主要集中在其两端轴承附近区域，因此改进轴承是减小主轴振动、保证主轴加工精度的重要途径，其研究结果可对车床的结构优化设计提供理论指导。“,”Making an analysis for vibration modal and frequency response of the lathe spindle,respectively by u-sing finite element method based on ANSYS and experiment of CA6140 type lathe in machining,and the calcula-tion results are compared and analyzed,which verified the accuracy of ANSYS method.Numerical simulation and experimental results show that:Spindle in the first order and fifth order are prone to resonance,but did not reach resonance,the low order natural frequency have more effect than the high order natural frequency of the spindle vibration;by the experiments can conclude that the maximum vibration of the main shaft in the working state is mainly concentrated in the vicinity of its two ends,therefore,the improved bearing is an important way to reduce the vibration of the main shaft and ensure the machining accuracy,and the research results can provide a theoreti-cal reference for the structural optimization design of the lathe.