中文摘要：

针对薄壁件铣削时由于刀具螺旋角对颤振稳定域的影响而不能确保铣削稳定及材料去除率的问题,基于刀具螺旋角对刀具与工件接触状态的影响,建立了考虑刀具螺旋角的薄壁件高速铣削动力学模型;通过实验结合半离散法解析铣削动力学模型,得到了考虑刀具螺旋角的稳定域lobe图,新的稳定域不仅识别出原稳定域中不稳定的参数组合,而且还拓宽了稳定铣削的主轴转速范围,避免了参数优化后依然会发生颤振的可能,从而更好的提高切削效率。

英文摘要：

The tool helix angle has a significant influence on the chatter stability domain, which results in milling unsteadiness and low material removal rate. Based on the influence of tool helix angle on the contact condition of tool workpiece, the high speed milling dynamical model was established by considering the he- lix angle. The model was analyzed by experiment and half dissociation theoretical method, more precious domain and lobe diagram considering helix angle was obtained. The new stability domain can distinguish the unstable parameters combination in the foregoing domain which excludes the effect of helix angle, which a- void the possibility of optimized parameters, and improve the milling efficiency better.