Extension of Tlusty׳s law for the identification of chatter stability lobes in multi-dimensional cutting processes
Extension of Tlusty׳s law for the identification of chatter stability lobes in multi-dimensional cutting processes
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DOI：
10.1016/j.ijmachtools.2014.03.007
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发表时间：
2014-07
影响因子：
14
通讯作者：
Andreas Otto;S. Rauh;M. Kolouch;G. Radons
中科院分区：
文献类型：
--
作者：
Andreas Otto;S. Rauh;M. Kolouch;G. Radons
本文研究了切削过程中的颤振振动。提出了一种在频域上统一计算车削、镗削、钻削过程稳定叶的方法。该方法可用于快速、可靠地识别稳定叶片，并可考虑非线性剪切力和过程阻尼力。将结构定向传递函数实部与极限切屑宽度之间的简单标量关系——可靠的变化规律推广到铣削和其他任何多维颤振问题，同时不忽略耦合动力学。所给出的分析适用于深入理解切削过程参数和结构参数对颤振稳定性的影响。基于实际机床实验数据的基本实例包括车削过程中回转方向对稳定性的影响、钻削过程中轴扭结构耦合的影响以及铣槽动力学。
Chatter vibrations in cutting processes are studied in the present paper. A unified approach for the calculation of the stability lobes for turning, boring, drilling and milling processes in the frequency domain is presented. The method can be used for a fast and reliable identification of the stability lobes and can take into account nonlinear shearing forces, as well as process damping forces. The applicability of Tlusty׳s law, which is a simple scalar relationship between the real part of the oriented transfer function of the structure and the limiting chip width, is extended to milling and any other multi-dimensional chatter problem without neglecting the coupled dynamics. The given analysis is suitable for getting a deep understanding of the chatter stability dependent on the parameters of the cutting process and the structure. Basic examples based on experimental data of real machine tools include the dependence of the stability behavior on the rotational direction in turning, the effect of axial–torsional structural coupling in drilling, and the dynamics of slot milling.