金属切削工艺是一种隐含着微观和宏观之间耦合作用的过程，微观局部原子间化学键的断裂将会最终导致材料的宏观去除。

Metal manufacturing technology is a process contains multiscale coupling phenomenon where fracture of atomic bond in the microscopic area will lead to the material removal in the macroscopic area.

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叙述了卷筒内齿轮用冷挤压工艺代替传统的金属切削加工方法的优点，并对卷筒内齿轮进行了工艺分析。

The advantages of the reel internal gear with cold extruding technology replacing traditional metal cutting working method were narrated, and the technological for the reel internal gear was analyzed.

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回顾了金属切削的工艺过程。

The craft procedure of the cutting metal was reviewed.

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