精密螺母磨床床身动静态分析与结构优化  

Dynamic and Static Analysis and Structural Optimization of Accurate Grinder Bed

作　　者：齐陆燕[1] 王禹林[1] 冯虎田[1] 

机构地区：[1]南京理工大学机械工程学院,南京210094

出　　处：《组合机床与自动化加工技术》2012年第6期9-12,共4页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家科技重大专项(2011ZX04003-021-02;2009ZX04001-171-02);国家青年自然科学基金(51105208);中国博士后科学基金资助项目(20110491426);江苏省博士后科学基金资助项目(1101082C)

摘　　要：以某型号精密螺母磨床为研究对象,使用Ansys有限元分析软件对其结构进行模态分析,识别出其结构设计中的薄弱环节。在此基础上,以提高床身低阶固有频率和降低床身质量为优化目标对其结构进行了改进。比较四种改进方案取得的结果,确定综合优化方案并对其进行相应的静刚度校核。优化后的床身与原模型相比,前四阶固有频率均有大幅提高,其中一阶固有频率提高16.7%,床身质量下降1.36%,最大位移变形降低了22.1%,且受力均匀,达到了预期的目标,同时也为螺母磨床床身的结构设计提供了参考依据。Taking the nut grinder as the researching object,finite element model of which is modeled by Ansys software.Find out the bed’s weakness through modal analysis,and then,modify the structure of the bed in order to increase the natural frequency and decrease the weight of the bed.By comparing the results of the four improvement schemes,determine the integrated optimization scheme,then make static check on it.The results of the integrated optimal design show that the first four natural frequencies all greatly increase and the first natural frequency of the redesigned bed increases by 16.7% and the weight reduces by 1.36%.Meanwhile,the maximal deformation decreases 22.1% and stress distribution is even.This study achieves good effect and provides the reference for the optimization of nut grinder bed.

关 键 词：磨床床身 ANSYS 动静态分析 结构优化 

分 类 号：TG502.31[金属学及工艺—金属切削加工及机床]