Programmable Optimal Design of Sinusoidal Spindle Speed Variation for Regenerative Chatter Suppression
Programmable Optimal Design of Sinusoidal Spindle Speed Variation for Regenerative Chatter Suppression
复制标题
DOI：
10.1016/j.promfg.2018.11.020
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Shuntaro Yamato;Takamichi Ito;H. Matsuzaki;Y. Kakinuma
中科院分区：
文献类型：
--
作者：
Shuntaro Yamato;Takamichi Ito;H. Matsuzaki;Y. Kakinuma
主轴连续变速，特别是正弦变速，通过破坏高瓣数区的再生效应来抑制颤振是一种有效而灵活的技术。在大多数研究中，它的最佳设计参数（即主轴转速变化的幅度和频率）选择，以最大限度地提高切削深度，使用复杂的稳定性仿真，这需要大量的时间和机床动力学。本文提出了一种新的简单准则，仅根据颤振频率和名义主轴转速，选择最佳的正弦主轴转速变化（S3V）的振幅和频率。在假设实际中S3V的变化幅度和频率都很小的情况下，可以将S3V与无线电工程中的频率调制技术类比，引入S3V的调制指数。在此基础上，以调制指数作为贝塞尔函数的自变量，基于运动过程能量分析，给出了最优参数的选取公式。虽然所提出的方法没有给出有关稳定极限的信息，它有可能有助于智能主动颤振抑制的自动选择S3V参数结合颤振监测系统。通过钻孔试验验证了该公式的正确性。
Continuous spindle speed variation, especially under sinusoidal speed law, is a well-known effective and flexible technique to suppress chatter vibration by disrupting regenerative effect in high-lobe-number zone. In most researches, its optimal design parameters (i.e. amplitude and frequency of spindle speed variation) are selected to maximize cutting depth by using complex stability simulations, which take much time and require machine tool dynamics. In this paper, novel simple criteria, only according to chatter frequency and nominal spindle speed, is proposed to select optimal amplitude and frequency of sinusoidal spindle speed variation (S3V). Under assumption that the variation amplitude and frequency is low in practice, modulation index for S3V can be introduced by analogy between S3V and frequency modulation technique in radio engineering. Then, the proposed formula to select optimal parameters is introduced based on kinematic process energy analysis with modulation index as an argument of Bessel function. Although the proposed method does not give information about stability limit, it has potential to contribute to intelligent active chatter suppression by automatic selection of S3V parameters combined with chatter monitoring system. Some boring tests were conducted to verify the proposed formula.