有限元分析在数控机床热误差检测中的应用  

Application of finite element analysis in the detection of thermal error of CNC machine

作　　者：库祥臣[1] 苗庆地 郭跃飞[1] 段明德[1] 

机构地区：[1]河南科技大学机电工程学院,河南洛阳471003

出　　处：《制造技术与机床》2015年第9期79-81,85,共4页Manufacturing Technology & Machine Tool

基　　金：国家科技重大专项课题"高档数控机床与基础制造装备"(2012ZX04005-021)

摘　　要：在数控机床热误差建模研究中,为了确定温度、位移测点位置以及实现测点数量简化,应用ANASYS软件建立了主轴箱装配体的有限元分析模型,并对其进行了在不同转速下的热—结构耦合分析。通过分析装配体温度云图和相关温度敏感点温升曲线,不仅得到了主轴和箱体的温度分布情况及热平衡时间,而且得出温升曲率和平衡时间与主轴转速的关系。热变形分析仿真计算出装配体在热源作用下的膨胀变形,观察位移云图和相应节点数据,可以直观地看出变形方向和大小。根据主轴箱装配体温度和位移的分析结果,确定了温度和位移传感器的安装位置,并依据传感器类型和装配体结构,进一步优化了传感器布置。In order to determine the measuring point position of temperature and displacement and reduce the num- bers of measurement points, the finite element analysis model of spindle box assembly is established by ANASYS software in the research of thermal error modeling of CNC machine. Meantime a coupling anal- ysis of thermal and structure is carried on the spindle box assembly in different speed. Through analy- zing the assembly＇ s temperature nephogram and the curve of related temperature sensitive points, not only the temperature distribution of spindle box assembly and the heat balance time are obtained, but al- so the variation of the temperature rise curvature and balance time under different rotating speed. The a- nalysis of thermal deformation simulates the swelling deformation under the function of heat source. After observing the nephogram and corresponding node＇ s data carefully, the direction and size of deformation can be seen directly. According to the analysis＇ s results of temperature and displacement of the spindle box assembly, the installation position of temperature and displacement sensors are determined. Based on the type of sensors and the assembly＇ s structure, the sensor＇ s placement can be further optimized.

关 键 词：ANASYS软件 耦合分析 温度 位移 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]