GATE PI
Automat will be economical if the batch size exceeds
Chip thickness ratio $$0.4$$
Under formed thickness $$0.6mm$$
Rake angle $$ + {10^0}$$
Cutting speed $$2.5m/s$$
Mean thickness of primary shear zone $$25microns$$
The shear strain rate in $${s^{ - 1}}$$ during the process is
$$\eqalign{ & \,\,\,\,\,\,\,\,\,\,\,\,Carbi{\mathop{\rm de}\nolimits} \,\,tool:\,\,\,\,\,\,\,\,\,\,\,\,V{T^{1.6}} = 3000 \cr & \,\,\,\,\,\,\,\,\,\,\,\,HSS\,\,tool:\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,V{T^{0.6}} = 200 \cr} $$
Where $$V$$ is the cutting speed in $$m/min$$ and $$T$$ is the tool life in $$min.$$ The carbide tool will provide higher tool life if the cutting speed in $$m/min$$ exceeds
The normal force acting at the chip-tool interface in $$N$$ is
The orthogonal rake angle of the cutting tool in degree is
Neglecting the contribution of the feed force towards cutting power, the specific cutting energy in $$J/m{m^3}$$ is
Assuming approach and over-travel of the cutting tool to be zero, the machining time in $$min$$ is