高转速对电主轴系统动力学特性的影响分析

发布时间：2019-04-01 08:38

【摘要】：高速切削的加工质量、加工效率与高速主轴系统的动力学特性密切相关,而转速对主轴系统的动力学特性有着明显的影响。该文首先确定了由高转速所诱发的主轴系统动力学特性影响因素,包括离心力、陀螺力矩以及轴承刚度软化等,并列举了围绕上述影响因素的相关研究成果。在此基础上,基于有限元法构建了考虑转速的主轴-轴承的通用有限元模型。以某电主轴为例,分别定性或定量分析了离心力、陀螺效应、轴承的径向刚度以及上述因素的耦合对高速主轴动力学特性的影响。该文的研究表明,主轴在高速运转状态下,轴承径向刚度、离心力和陀螺效应对主轴系统动力学特性都有较显著的影响,在对高速运转状态下的主轴系统动力学建模时,必须考虑上述影响因素。
[Abstract]:The machining quality and efficiency of high-speed cutting are closely related to the dynamic characteristics of the high-speed spindle system, and the rotational speed has an obvious effect on the dynamic characteristics of the spindle system. In this paper, the factors affecting the dynamic characteristics of spindle system induced by high speed are determined, including centrifugal force, gyroscopic torque and bearing stiffness softening, and the related research results around the above factors are listed. On the basis of this, a general finite element model of spindle-bearing considering rotational speed is constructed based on finite element method. Taking an electric spindle as an example, the effects of centrifugal force, gyro effect, radial stiffness of bearing and coupling of above factors on the dynamic characteristics of high-speed spindle are analyzed qualitatively or quantitatively. The research shows that the radial stiffness of bearing, centrifugal force and gyro effect have significant effects on the dynamic characteristics of spindle system in high-speed running state, and when modeling the dynamics of spindle system in high-speed running state, The above factors must be taken into account.
【作者单位】：东北大学机械工程与自动化学院;
【基金】：辽宁省教育厅科学研究一般项目(L2013115) 东北大学博士后基金项目(20140301) 国家自然科学基金项目(51405070)
【分类号】：TG502.1

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