摘要
拖板是机床上重要的支撑部件,其动态性能直接影响到加工工件的精度和生产效率。以某型号八米旋风铣床的拖板为研究对象,建立拖板结构的有限元模型,运用有限元分析软件ANSYS对原结构进行模态分析,得到各阶模态下的固有频率和振型,找出结构的薄弱环节并进行优化设计,分别对拖板不同部位无筋板、加筋板及增加板材厚度等情况提出了多种改进方案并进行比较,得出优化方案。与原结构相比,优化方案的一阶固有频率增加了56.74Hz,质量减小了2.27%,拖板的动态性能得到了改善。对原结构和优化后结构进行静力分析,从得到的位移变形图及应力云图上看,拖板的位移变形最大值由0.8E-6m减小到0.637E-6m,应力的最大值由0.414MPa减小到0.391MPa,受力情况得到了改善,为产品的性能分析和结构改进提供了可借鉴的方法。
Carriage is an important support tool component whose dynamic performance affects the accuracy of the workpieee and production efficiency. This paper takes the carriage of eight - meter whirling machine tool as the object and its kinetic model is established, The modal analysis of the carriage is made by software ANSYS and its natural frequency and mode shapes are given. The weak points of the structure are identified and the structure is optimized. Several schemes arc proposed and compared according to different situations such as with or without stiffening plates, increasing the thicknesses, then the optimized scheme is ohtained. Compared with the original structure, the first natural frequency is increased by 56.74 Hz,the mass is reduced by 2.27 % o The dynamic performance is improve＆ The static analysis of the original and the improved carriage is made and the maximum displacement deformation decreases from 0.8E - 6m to 0. 637E - 6m.The maximum stress decreases from 0. 414MP to 0. 391MPa, so the force condition is improved. This can offer some reference for the performance analysis and optimization design of structures.
出处
《机械设计与研究》
CSCD
北大核心
2011年第1期102-105,共4页
Machine Design And Research
基金
国家科技重大专项资助项目(2009ZX04001-171-02)
江苏省创新学者攀登项目(BK2008050)
关键词
旋风铣床
拖板
模态分析
优化设计
静力分析
whirling machine tool
carriage
modal analysis
structure optimization
static analysis
