螺旋槽专用数控铣床立柱拓扑优化设计

Topological Optimization Design of Column for Spiral Groove Special CNC Milling Machine

以螺旋槽专用数控铣床的立柱为研究对象,为改善立柱静动态特性、减轻立柱质量,从而优化整机的动态特性,对其进行了拓扑优化设计。首先运用三维建模软件建立螺旋槽专用数控铣床立柱的实体模型,利用有限元分析软件对立柱进行静态特性分析和动态特性分析;然后通过拓扑优化方法对立柱进行结构优化,改善立柱廓形。在此基础上,基于响应面法对立柱结构尺寸进一步优化,最终获得立柱最佳结构及尺寸。分析结果表明:经过改进后的立柱整体质量降低且最大变形量减小了24.9%,最大等效应力减小了21.3%,立柱前4阶固有频率均有提高,优化效果较为明显,可为数控装备的部件结构优化提供理论参考。

Taking the column of the CNC milling machine for spiral grooves as the research object,in order to improve the static and dynamic characteristics of the column,reduce the quality of the column,and optimize the dynamic characteristics of the whole machine,the topology optimization design is carried out.Firstly,the solid model of the column of the spiral groove special CNC milling machine is established by 3D modeling software,and the static and dynamic characteristics of the column are analyzed by the finite element analysis software.Then,the structure of the column is optimized by the topology optimization method to improve the column profile.On this basis,the structure size of the column is further optimized based on the response surface method,and finally the optimal structure and size of the column are obtained.The results show that the overall quality of the improved column is reduced,the maximum deformation is reduced by 24.9%,the maximum equivalent stress is reduced by 21.3%,and the first four natural frequencies of the column are increased.The optimization effect is obvious,which can provide a theoretical reference for the optimization of the component structure of CNC equipment.