Following the analysis of the mechanism for shaping form errors during machining curved surfaces on CNC milling machine, the method for measuring form errors and error source is put forward.

分析了数控铣床曲面加工形状误差的形成机理，提出对形状误差及误差源的测量方法。

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The conception that the form-milling cutter can only be used to rough finish the workpiece should be changed. This kind of form-milling cutter can also be used to finishing-machine workpiece.

改变正前角成形铣刀只能用作粗加工的观念，可将正前角成形铣刀用于成形面的精加工。

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