【摘要】 建立了小径向切深下高速铣削系统动力学模型。该模型考虑了再生效应、刀具-工件接触分离效应和进给量等因素的影响。针对建立的周期时滞微分方程,运用周期系统的线性化理论和半离散估计技术,将无限维特征值稳定性判定问题转化为有限维Floquet变换矩阵特征乘子稳定性判定问题,判定系统的稳定性,获得系统的稳定性极限图。研究结果显示,在小径向切深情况下,由于进给量的影响,铣削系统稳定性有显著的下降趋势,但不同进给量对系统稳定性的影响不大。更多还原

【Abstract】 Dynamics model for high-speed milling system in low radial immersion was developed,including regenerative effects,tool-workpiece loss-of-contact and feed effects.The linearization theory of periodic delay differential equation and semi-discretizated technique were used to approximate the finite dimensional Floquet transition matrix in order to determine the stability of milling process.The stability charts for several feed rate in low radial immersion were constructed.It is shown that stability limits are reduced evidently due to the effects of feed rate for low radial immersion in high-speed milling processes.更多还原