中文摘要：

通过分析斜角切削的几何关系，得到了斜角切削参数和切削力系数之间的关系表达式，从而在理论上得到了铣刀参数和切削颤振之间的数学关系表达式．在此基础上，研究了相同铣削参数下铣刀螺旋角和法向前角对铣削稳定性的影响，绘制了不同铣刀参数下的轴向切深、径向切深和主轴转速的三维稳定性图．通过对不同参数下稳定性图的研究，发现随着螺旋角和法向前角的增加，铣削的稳定性逐渐增加．

英文摘要：

By analyzing the geometrical relationship of oblique cutting, the relationship between the oblique cutting parameters and the milling force coefficients is formulized, and the mathematical expressions describing the relation- ship between the cutter parameters and the cutting chatter are theoretically deduced. Moreover, the effects of helix angle and normal rake angle on the milling stability in the same milling parameter conditions are investigated, and the three-dimension stability graphs of the axial cutting depth, the radial cutting depth and the spindle speed are plotted. It is found from the stability graphs that the milling stability improves with the increase of the helix angle and the normal rake angle.