摘要
在立式微型铣床的设计初期,需关注机床整体承载结构的设计和布局,为达到设计精度要求提供必要的保障。从提高立式微铣床龙门结构刚度的角度出发,首先利用Ansys软件对四种常见龙门结构模型进行静力学分析和模态分析,并对比了各结构的静动态刚度特性;在对比结果的基础上,提出了一种基于三心拱的新型龙门结构,并通过仿真验证了该结构静动态刚度的优越性。最后在以减小静力变形量和提高一阶固有频率为目标,对新型三心拱龙门结构的高度和跨度参数进行了优化设计,实现了微铣床龙门结构静动态刚度的提升。
In the early development stage of a micro-milling machine, attention should be paid to the integral structure design in order to meet the required positioning precisior^A contrastive analysis with different schemes of gantry structures in micro milling has been made, aiming to find out a structure with better static and dynamic stiffness. Ansys Workbench is adopted to undertake the static analysis and modal analysis. Based on the comparison, an improved three-centered arch structure is proposed according to the combination of the features of the two advanced structures. In the end,the parameters of the threecentered arch structure（span and height） were optimized to achieve a gantry structure with less distortion and better stiffness.
出处
《机械设计与制造》
北大核心
2014年第6期1-4,共4页
Machinery Design & Manufacture
基金
国家863计划资助项目(2012AA041309-02)
关键词
微铣床
龙门结构
对比分析
三心拱
优化设计
Micro Milling Machine
Gantry Structure
Contrastive Analysis
Three-centered Arch
Optimization Design
