基于灵敏度分析的XK719数控铣床尺寸优化  

Size Optimization of XK719 CNC Milling Machine Based on Sensitivity Analysis

作　　者：张疆平 李想[1] 贾成阁 赵希禄 关英俊[1] 

机构地区：[1]长春工业大学机电工程学院,长春130012 [2]日本琦玉工业大学工学部

出　　处：《组合机床与自动化加工技术》2016年第2期5-8,12,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：教育部"春晖计划"资助项目(20130012)

摘　　要：为了改善机床动静态特性,以XK719数控铣床为研究对象,采用Hypermesh软件建立数控铣床的有限元模型。在对铣床进行谐响应分析的基础上,得出机床1、2阶固有频率偏低的结论。运用灵敏度分析来寻找关键尺寸,并以关键尺寸为设计变量,以机床的质量和1、2阶固有频率为响应进行尺寸优化。最终,在铣床质量变化不大的情况下,使铣床的1阶固有频率提高了15.8%,2阶固有频率提高了11.3%。结果表明:该设计方法可以为机床零、部件的设计提供借鉴。In order to improve static and dynamic characteristics of machine tools, hypermesh software was adopted to establish the finite element model of CNC milling machine with the XK719 CNC milling machine as the research object. On the basis of the harmonic response analysis for milling machine, it was concluded that the first and second natural frequency were low. Using the method of sensitivity analysis found the key dimensions. And the size optimzation was carried out where the key dimensions was defined as design varia- bles and the mass of the machine tool, the first natural frequency and the second natural frequancy were de- fined as responses. Finally, under the conditions of little change of milling machine＇ s mass, this method made the first natural fraquency increased by 11.5 % and the second natural frequancy increased by 11.3 %. Re- suits showed that the design method provided reference for the design of the parts and components.

关 键 词：谐响应分析 灵敏度分析 尺寸优化 

分 类 号：TH122[机械工程—机械设计及理论] TG659[金属学及工艺—金属切削加工及机床]