ドリル寿命・摩耗予測計算機
テイラーの工具寿命方程式を用いたハイス、コバルトハイス、超硬ドリルの寿命予測。
Reference & Planned Conditions
Used to translate tool life minutes into total estimated holes drilled per tool.
Increasing cutting speed from 30 to 45 m/min (+50%) drastically accelerates thermal edge wear, decreasing relative tool life by 80.2%.
Taylor’s equation ($V \cdot T^n = C$) scales purely on thermal cutting velocity. It assumes feed rate, coolant pressure, toolholder runout (TIR), and material hardness are strictly identical. In real machining, chip recutting, poor lubrication, or runout over 0.01mm will destroy tool life faster than any theoretical formula predicts. Always validate with a shop trial.
How Taylor's Tool-Life Model Works in Drilling
F.W. Taylor established that cutting temperature is primarily driven by surface cutting speed ($V_c$). Holding feed per revolution, tool geometry, coolant pressure, and material hardness constant, an increase in cutting speed exponentially accelerates thermal edge breakdown.
Understanding the Exponent $n$
HSS tools have a steep slope ($n \approx 0.125$), meaning a tiny 15% increase in speed cuts tool life in half. Coated solid carbide has a flatter slope ($n \approx 0.25$ to $0.35$), withstanding higher thermal loads before rapid crater wear initiates.