摘要
机床在多热源的综合作用下将产生热变形,破坏了刀具与工件的正确相互位置而造成加工误差。在机床各部件中,主轴箱直接与主轴配合,主轴箱的温升和变形将影响主轴温度的升高和刀具位置的改变。对机床主轴箱的主要热源(轴承、丝杠、导轨、电机)的发热量进行了分析计算,运用有限元方法建立了主轴箱的温度场,综合主轴箱在整机上装配的位置约束条件,获得其热变形。分析结果表明:机床主轴箱采用热对称结构,可以有效地避免外圆加工时的圆柱度误差,并通过试验对仿真结果进行了验证。
Under the action of multiple heat sources, thermal deformation would take place in the machine tools. The correct relation positions of the tool and workpiece are broken, resulting in processing errors. In those machine parts, the spindle box coordinates with main spindle directly, the temperature increase and structure deformation of spindle box leads directly to the increase of spindle temperature and the change of tools position. In this paper, the main heat sources of spindle box, including bearing, screw, rail and motor, were analyzed and calculated. The temperature field model of the spindle box was established, using the FEM method. Combining the assembly con- strain conditions of the spindle box and the entire machine, the thermal deformation model was created. The analy- sis result shows that using thermal symmetric structure of spindle box could effectively avoid the cylindricity error when doing cylindrical turning. At last, the simulation result was proved reliable by experiments.
出处
《机械科学与技术》
CSCD
北大核心
2012年第11期1860-1863,1867,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
江苏省产学研前瞻性联合研究项目(BY2009102)
江苏省"六大人才高峰"项目
南京航空航天大学基本科研业务费专项科研项目资助
关键词
主轴箱
热特性
热载荷
热变形
spindle box
thermal characteristics
thermal deformation
machine tools
finite element method
