摘要
基于热弹性力学与有限单元法,建立了一台国产新型龙门式加工中心主轴系统的有限元模型,计算了轴承发热量、热对流系数,进行了主轴温度场有限元分析,并采用“热-结构”耦合模型计算了主轴系统的热变形。计算和分析结果表明,在主轴转速为3000r/min时,主轴系统经过33min后达到热平衡状态,最高温升出现在前轴承内圈处。计算分析结果为后续加工中心主轴系统的优化提供了基础。
A model of a spindle - bearing system in a new gantry - type machining center is built,based on the thermo - elastical mechanism and finite element analysis （FEA）. By calculating the capability of heat producing and the heat transfer coefficient of the bearing, the thermal field of the spindle is investigated. Then the deformation of the system is calculated through ＂thermal -structure＂ coupled model. The result shows that the system comes to the thermal balance after 33 minutes when rotating at 3000r/min. The highest temperature is located in the inner rings of the front bearings. The calculation and analysis above can be applied to the optimal design of the spindle - bearing system.
出处
《制造技术与机床》
CSCD
北大核心
2007年第2期32-35,共4页
Manufacturing Technology & Machine Tool
基金
"863计划"重点项目(2005AA424222)资助
关键词
主轴系统
有限元
法热态特性
Spindle System
Finite Element Analysis （FEA）
Thermal Characteristics
