工作機械構造の熱的適合設計のためのシミュレーション方法 : 主軸受周辺構造体と主軸台構造の特性解明への応用

抄録

The thermal deformation of the machine tool spindle mainly caused by the internal heat sources such as a bearing has recently become the most important subject to enhance the performance of manufacturing systems for precision prouducts. In this paper, the dynamic thermal hehavior of the main spindle system with the rolling bearing have been simulated on the basis of the thermal closed-loop concept and also using the finite element method. Especially in the constrained condition of the spindle nose, which causes in the variation of heat generation in the bearing because of the transient thermal deformation of structural elements, the effects of the bearing surroundings, i. e., those of the quill and bearing housing structures, fave been clarified. Comparing the obtained results with experimental ones so far reported elsewhere, the validity of this simulation has also been verified. In addition, the thermal and mechanical effects of the reinforcing rib in the spindle housing and also the cooling effects of the quill have been investigated by the proposed method.