还可以看到当刀具进入工件切削时直接达到最大切削深度。

It can also be seen that the maximum depth of cut is achieved directly as the cutter engages with the workpiece.

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结果表明：工件进给速度对表面粗糙度的影响最大，切削深度和刀具前角次之，工件硬度影响最小。

The results show that the effects on surface roughness are feed speed, depth of cutting , tool rake angle and parts hardness in turn.

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在干切状态下，切削深度对刀具寿命影响最大。

Under dry cutting state, tool life is affected mostly by cutting depth.

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