It's the key to analyze the forming feasibility, find out the way to calculate the forming force, select the suitable process parameter in open-die cold extrusion of rectangle spline.

矩形花键轴是汽车传动的重要零件，矩形花键的无约束正挤压成形是一种先进的花键加工方法。

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Create a dummy, and add a Path Constraint to make it follow the same spline, but now (with Auto Key on) go to frame 0 and type in 10% in the % Along Path field.

创建一个虚拟体，添加一个路径约束，让它跟着同一条曲线运动，但是现在(保持自动关键帧打开)回到第0帧，将百分比调到10%。

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