切削刃钝圆一般能使切屑卷曲半径增大。

The cutting edge roundness can make chip curling radii larger.

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尾部逐渐变细，尾尖钝圆。

Tail is slender, gradually tapering to bluntly pointed tip.

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结果表明，刀刃钝圆半径越小，刀尖越锋利，但是磨损较快，切削力很快增加。

The results indicate that the cutting corner radius is lesser, the tool is sharper, but it wears out quickly and makes the cutting force increases.

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