摘要
针对高速机床滚珠丝杠副摩擦生热导致滚珠丝杠产生轴向热变形,从而影响机床定位精度的问题,提出采取全面冷却与重点冷却相结合的方式冷却滚珠丝杠,即采用空心滚珠丝杠替代实心滚珠丝杠通入冷却介质全面强制冷却,同时对空心螺母局部重点冷却,共同抑制空心丝杠的温升与热变形。对不同进给速度下实心/空心滚珠丝杠的热特性进行理论分析,空心滚珠丝杠的热变形要比实心滚珠丝杠的热变形小（1~2）个数量级,从而提高了伺服进给系统的定位精度。同时,仿真了实心/空心滚珠丝杠模型的温度分布与热变形,分析了空心滚珠丝杠的温度场与热变形规律。总之,为空心滚珠丝杠在高速伺服进给系统的应用提供理论依据。
The ball screw axial thermal deformations in high speed machine tool which are caused by ball screw pair friction heat affects the machine tool positioning accuracy,it puts forward a combination system of comprehensive cooling and part cooling; namely hollow ball screw in alternative solid ball screw comprehensive forced cooling by cooling medium,at the same time,the hollow nut local cooling,mutual inhibition of temperature rise and thermal deformation of hollow ball screw. Under different feed speed,the thermal characteristics of the solid/hollow ball screw are under theoretical analysis,which hollow ball screw＇s thermal deformation is smaller（1~2）orders of magnitude than the solid ball screw,thus improving the positioning precision of the servo feed system. At the same time,it simulated solid/hollow ball screw temperature distribution and thermal deformation of the model and analyzed the hollow ball screw＇s temperature field and thermal deformation law. All in all,it provides theoretical basis for the application of hollow ball screw in high speed servo feed system.
出处
《机械设计与制造》
北大核心
2015年第10期80-83,共4页
Machinery Design & Manufacture
关键词
滚珠丝杠
中空冷却
热变形
仿真
Ball Screw
Hollow Cooling
Thermal Deformation
Simulation
