高架桥式龙门数控雕铣机的动态特性研究

Dynamic Analysis for Viaduct Type Longmen NC Engraving and Milling Machine

主要以某公司自主研发的大型汽车覆盖件专用的消失模保丽龙模样加工的雕铣机为研究对象,采用UG NX软件建立了该雕铣机的CAD模型,通过对原CAD模型进行相关的简化后,利用ANSYS软件对所建立的模型进行了相应的动态特性分析。首先,通过模态分析得到了该雕铣机前6阶的固有频率和相应的振型,找出了该雕铣机相对应的薄弱环节;然后,通过谐响应分析,在雕铣机出现最大变形区域的薄弱地方,选取一节点进行相应的谐响应分析,为机床的改进设计和分析提供了参考。

With an engraving and milling machine for machining EPS pattern of evaporative pattern casting special for large type automobile panel developed by a company being as a study object,a CAD model for the machine was established by adopting UG NX software.And dynamic characteristics of the model were analyzed using ANSYS software through simplifying the original CAD model.First the first 6 natural frequencies and vibration mode for the machine was obtained through modal analysis and the weak link was found out;then,through the harmonic response analysis,a node at the weak areas where the biggest deformation may occur was selected to carry out harmonic response analysis,which result provided references for improving design and analyzing the machine tool.