严禁使用刀刃磨损的刀具进行加工。
这种测试方法，评估在加工时铣刀磨损量对铣刀与工具之间温差电压的影响，而非直接观察刀刃本身。
This method evaluates the effects on the thermo -voltage of the wearing instead of directly observing the tools themselves.
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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