在加工细长轴时,因工件刚性差,容易产生弯曲变形和振动,得不到准确的几何形状精度。在采用跟刀架后,虽然能够增加工件的刚度,消除径向切削力P_Y把工件“顶弯”的因素,但还不能解决轴向切削力P_x把工件压弯的问题,当工件的长径比(L/D)较大时,这种弯曲变形更为显著(如图1所示)。工件变曲后,在 In the processing of slender shaft, due to the poor rigidity of the workpiece, prone to bending deformation and vibration, can not get accurate geometry accuracy. The use of heel holder, although the workpiece can increase the rigidity and eliminate the radial cutting force P_Y the workpiece “bending” factor, but can not solve the axial cutting force P_x bending the workpiece, when the workpiece’s long diameter This bending deformation is more pronounced when the ratio (L / D) is larger (as shown in Figure 1). After the workpiece is distorted, at