In case the form of dynamic cutting force is varied, the optimal region of the stiffness spindle orientation is always different.

动态切削力的构成不同，工艺系统刚度主轴的最佳方位也不同。

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We have made certain that the reason of the splined spindle rapture is fatigue failure, its crack initiation lies in the minimal knuckle curvature radius surface region of the spline dedendum bottom.

初步确定了花键轴的断裂是疲劳断裂，裂纹源在花键齿根底部过渡圆角曲率半径最小的表面部位。

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A testing method which is used for detecting the spindle's vital region of the stresses with incident wave from the end face of spindle has been researched.

研究了从端面入射超声波对轴类工件关键应力区域的原位检测方法。

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