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UPRVUNL AE ME 2014 Official Paper

Option 1 : U = F/Z

In a metal cutting process

The power of cutting is given by,

**Power = Energy per unit volume × material removal rate**

**i.e. F = U × Z **or,

**The energy per unit volume U (J/mm ^{3}) is the ratio of power required for cutting to the material removal rate of cutting.**

i.e. \(U = \frac{F}{Z}\) in J/mm^{3}. or, F = U.Z

Where, F = cutting power in W or J-s,

Z = material removal rate in mm