摘要
基于现代机床热特性设计要求,利用有限元法对某型高速高精度数控车床主轴系统进行了热特性理论建模与分析.结果表明,当主轴转速为 8 000r/min时,系统经 3h达到热平衡,其最高温升位于前轴承内圈处.进一步计算主轴系统的热变形,并通过对主轴箱体散热筋板的合理布局和优化设计,有效降低了主轴头部的径向跳动和端跳误差,使其小于 2μm,均能满足设计要求.特别是主轴头部的径向跳动误差经优化设计后进一步减小为 1.55μm,优化效果非常明显.
In order to meet the demand of thermal design of modern machine tools, thermal model and thermal characteristics of high-speed spindle system in numerical control (NC) precision lathe were studied in detail using finite element method (FEM). The results show that the system reaches a thermal balance after 3 h while it is rotating at 8000 r/min and the highest temperature is located in the inner-ring of the front bearings. Furthermore, the thermal deformations of the spindle head were calculated. Through reasonable arrangement and optimal design of the fines, the radial and axial deformation of the spindle head can be reduced to less than 2 μm, which satisfies the demand of manufacturing accuracy. Especially, the radial deformation of the spindle head is around 1.55 μm, the optimization effect being remarkable.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第2期231-234,共4页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金资助项目(503750260)
关键词
主轴系统
热分析
热变形
散热筋
有限元法
Boundary conditions
Deformation
Finite element method
Fins (heat exchange)
Heat transfer
Numerical control systems
Structural optimization
Temperature distribution
