摘要
用有限元分析软件对数控机床进行分析时,能否获得较高精度的分析结果是关键问题。传统的结构分析注重研究某个单独的机械部件,缺乏考虑在实际工况下,切削力、重力等外部载荷作用在机床各部件之间的作用力和约束的相互关系对结果精度和可靠性的影响。在分析一立式数控镗铣床各部件之间装配关系的基础上,在结构相应位置上设置接触及节点坐标耦合,将实际工况下机床各部件间的关系转化到有限元模型上,使有限元分析结果更加贴近实际工况,通过对比有限元法和现场实验所得结果,验证基于分析各部件间的装配关系的机床结构分析过程是可行和可靠的。
when using the software of the finite element analysis for a numerical control machine tool, the key issue is to obtain a good result precision. The conventional structural analyses put interest in a single part of machinery and ignore the influences of accurance and reliability acted machine parts of cutting force, gravity and other external load between applied force and constrained assembly relationship for every part under actral working conditionst. The assembly relationship of a column milling ＆ tooling machinery was analyzed, the contact and node coordinate coupling was set in relevant structure position, the relationship of every key part of the machine tools was transferred to the finite element model and more closer to the actral working conditions. With comparing the result of finite element methods to the field test, the comparative result shows this analytical method that consider the assembty relationship between every parts can ensure the method feasible and reliable.
出处
《机械强度》
CAS
CSCD
北大核心
2015年第1期166-170,共5页
Journal of Mechanical Strength
基金
河南省科技攻关项目(13A520232)
河南科技大学重大前期预研项目(2011CX016)资助~~
关键词
数控机床
装配关系
坐标耦合
有限元分析
实验
Numerical control machine tool
Assembly relationship
Coordinate coupling
Finite element analysis
Test
