含不平衡质量和主轴倾角的电主轴系统动力学建模

IF 2.5 4区 综合性期刊 Q2 CHEMISTRY, MULTIDISCIPLINARY Applied Sciences-Basel Pub Date : 2023-09-06 DOI:10.3390/app131810053
Dan Gu, Yufeng Xie, Shulin Liu, Yuan Wei, Jiayi Shen
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引用次数: 0

摘要

高速电主轴以其速度快、精度高、效率高等优点,在航空航天加工领域得到了广泛的应用。用于加工航空航天产品的数控机床对加工精度要求很高,一旦主轴出现故障,将严重影响产品加工质量。因此,研究主轴的故障,特别是由细微误差引起的故障具有重要意义。本文建立了具有不平衡质量故障和主轴倾斜故障的主轴的动力学模型,并利用整体传递矩阵法(WTMM)计算了电主轴的固有频率和振型。讨论了两种故障独立发生时,不同情况下主轴起始端的挠度。结果表明,同一故障的主轴端部挠度在不同转速下具有不同的灵敏度。在三阶固有频率下,无论发生什么故障,电主轴的偏转都是最大的。尽管电主轴以相同的速度旋转,但不同的故障可能会导致不同的模式形状。在较低转速下,当发生不平衡质量故障时,振型呈拱形,而当发生主轴倾斜故障时,其振型呈凹形。
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Dynamic Modeling of Motorized Spindle System with Unbalanced Mass and Spindle Inclination
The high-speed motorized spindle has been wildly used in the field of aerospace processing, due to its advantages such as high speed, high precision, and high efficiency. CNC machine tools used for processing aerospace products require high machining accuracy, and once the spindle fails, it will seriously affect the quality of product processing. Thus, it is important to study the faults of the spindle, especially the faults caused by subtle errors. In this work, a dynamic model of a spindle with unbalanced mass fault and spindle inclination fault is established, and the natural frequencies and mode shapes of the motorized spindle are calculated by using the whole transfer matrix method (WTMM). The deflections of the spindle initial end in the different situations are discussed when the two faults happen independently. The results show that the spindle end deflection of the same fault has different sensitivity at different speeds. At the third order of natural frequencies, the deflection of a motorized spindle is greatest regardless of the fault that occurs. Although the motorized spindle rotates at the same speed, different faults could cause different mode shapes. At the lower speed, when the unbalanced mass fault happens, the mode shape is in an arched shape, and while the spindle inclination fault happens, the mode shape is in a concave shape.
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来源期刊
Applied Sciences-Basel
Applied Sciences-Basel CHEMISTRY, MULTIDISCIPLINARYMATERIALS SCIE-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
5.30
自引率
11.10%
发文量
10882
期刊介绍: Applied Sciences (ISSN 2076-3417) provides an advanced forum on all aspects of applied natural sciences. It publishes reviews, research papers and communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files and software regarding the full details of the calculation or experimental procedure, if unable to be published in a normal way, can be deposited as supplementary electronic material.
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