CAJ | 학술논문

为研究机床主轴系统静刚度特性，建立一种高性能加工中心主轴－轴承系统模型，该模型包括主轴转子和轴承。采用有限元法建立主轴轴系零件模型，并与轴承拟静力学模型集成得到主轴系统有限元模型，通过计算得到主轴系统3个方向的静刚度。对该机床主轴系统进行静刚度测试实验，以验证理论计算结果的正确性。研究表明：理论计算结果和实验结果具有较好一致性，因此可以有效地证明该有限元模型的准确性；此外，由于主轴系统内部存在阻尼效应及摩擦作用，卸载时静刚度大于加载时静刚度；同时其轴向静刚度存在一定非线性。
위연구궤상주축계통정강도특성，건립일충고성능가공중심주축－축승계통모형，해모형포괄주축전자화축승。채용유한원법건립주축축계령건모형，병여축승의정역학모형집성득도주축계통유한원모형，통과계산득도주축계통3개방향적정강도。대해궤상주축계통진행정강도측시실험，이험증이론계산결과적정학성。연구표명：이론계산결과화실험결과구유교호일치성，인차가이유효지증명해유한원모형적준학성；차외，유우주축계통내부존재조니효응급마찰작용，사재시정강도대우가재시정강도；동시기축향정강도존재일정비선성。
In order to study the characteristics of static stiffness of the machine spindle system, a spindle?bearing system model of a high?performance machining center was established, which including the spindle rotor and the bearing. The components model of spindle system was built by the finite element method ( FEM) , composed with the quasi?static model of the ball bearing, the finite ele?ment model of the spindle system was obtained, and the static stiffness of the spindle system was obtained through calculating. The test experiment of static stiffness was carried out to verify the correctness of the theoretical calculation results. The results show that the the?oretical calculations and the experimental results are corresponding quite well, so the accuracy of the FEM is proved. Besides, due to the damping effect and friction function inside spindle system, the unloading static stiffness is greater than the loading static stiffness. At the same time, certain amount of nonlinearity of axial static stiffness is existed.