数控车床主轴箱的动力特性修改研究

Nvestigation on Dynamic Structural Modification of NC Machine Head

为改善数控车床主轴箱动态性能,提高产品的加工精度和质量,在进行了主轴箱模态试验研究的基础上,对主轴箱结构进行了动力特性修改研究。结果表明:质量和阻尼修改对结构固有频率和阻尼比的影响程度不大;结构固有频率和阻尼比对刚度修改比较灵敏。研究结果揭示了质量、阻尼比、刚度等模态参数调整对结构动态特性的影响规律,为改善数控车床主轴箱的动态特性提供了有效途径。

To improve dynamic performance of NC machine head, increase machining accuracy and quality of products, the dynamic modification of machine head is investigated based on modal experiment. The results have been shown that the mass and damping modification unremarkably influence natural frequency and damp ratio of structure. The natural frequency and damp ratio of structure are influenced remarkably by stiffness modification. The influence rules of modal parameters regulation on dynamics performance of machine head have been revealed, and the effective method of improving dynamic characteristic of mechanical products is put forward.