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Fundamental Tool & Die Making techniques


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Cutting machining time Calculation

Cutting machining time inclusive of setting up the machine, getting the tools, study of drawing. The actual Machining time taken and measuring & checking.

 

Machining Turning operation

 


machining turning Machine time = length to be machined / Feed rate

Longitudinal turning - ( rpm known )
l = length to be machined
Sr = Feed rate
n = rpm

Machine Time = l / Sr x n


Longitudinal turning - ( rpm unknown )
d = Diameter
v = Cutting speed
Sr = Feed rate
l = Length to be machined

Machine time = l x pi x d / Sr x v

Facing
Machine time = r / sr x n


 

Drilling operation

drill machining

Machine time = length of tool traveled / Feed rate
Machine time ( Known rpm )
L = length of tool travel ( l + 0.3 d )
S = Feed rate
Sr = Feed per revolution
n = rpm

d = Diameter of drill
Machine Time = L / Sr x n


Machine time - ( rpm unknown )
L = length of tool travel ( l + 0.3 d )
V = cutting speed
Sr = Feed per revolution
n = rpm
d = Diameter of drill

V= pi x d x n / 1000
n=Vx1000/Pi x d

Machine time = l x pi x d / Sr x v x1000

 


Milling operation

milling machining

Machine time = length of tool traveled / Feed rate

machine time = L / s

 

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