重型数控卧式镗车床整机模态分析与实验研究

Modal analysis and experimental research on heavy-duty CNC horizontal boring lathe

重型数控卧式镗车床适用于一些直径和承载均已超出常规机床加工范围的大型轴孔类零件的加工,其加工精度往往受到外界干扰及加工过程颤动的影响。为了有效提高重型数控卧式镗车床加工精度,有必要对其振动特性进行研究。利用UG软件建立重型数控卧式镗车床整机模型,采用ANSYS软件对模型进行模态分析,通过对所得整机前6阶模态固有频率和振型的观察与描述,提出确保机床加工精度的优化方案。最后,结合LMS Test.Lab11b软件平台,采用锤击法模态实验结果与仿真结果进行对比分析,验证了仿真结果的准确性及可靠性,具有一定的工程实际意义。

Heavy-duty CNC horizontal boring lathe was used for the processing of large parts of the shaft hole type exceeding the scope of conventional machining for the diameter and capacity ,which precision was subjected to external interference and the influence of fibrillation in the process. In order to effectively improve the machining accuracy of heavy-duty CNC horizontal boring lathe, it is necessary to study its vibration characteristics. The main contents included ： establishing the whole model of heavy lathe CNC horizontal boring lathe then using ANSYS analysis the model. By describing the former six model observation and description of natural frequencies and mode shapes, proposed optimization scheme ensuring the accuracy of machining. Finally combining with software platform of LMS Test. Labl l b, using the hammering method compared the results of analysis and simulation, which verified the accuracy and reliability of the simulation results, with some practical engineering significance.