resume
2.
Machining Turning operation
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
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
Machine time = length of tool traveled / Feed rate machine time = L / s
Calculate Time for Turning
Calculate Time for Boring
Calculate Time for Drilling
Calculate Time for Facing
Calculate Time for Knurling
Calculate Time for Tapping
Calculate Time for Threading
Number Of Cuts for Internal Threads = 32 x Pitch
Number Of Cuts for Internal Threads = 25 x Pitch
1.
Cutting Speed(CS) of a material is the ideal number of Feet-per-Minute that the tool-bit should pass over the work-piece. This "Ideal" cutting speed assumes sharp tools and flood coolant. Adjustments need to be made for less than ideal cutting conditions. Different materials (High-Carbon/Low-Carbon Steels, Aluminums, Different kinds of Plastics) have different Cutting Speeds and can be worked/cut at different rates. In addition, some tools or processes (like threading, knurling, or cutting-off) will need to be worked at slower speeds than the Cutting Speed would indicate.
Feed Rate(Lathe) refers to how fast a lathe-tool should move through the material being cut. This is calculated
Machining Turning operation
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
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
Machine time = length of tool traveled / Feed rate machine time = L / s
Calculate Time for Turning
Calculate Time for Boring
Calculate Time for Drilling
Calculate Time for Facing
Calculate Time for Knurling
Calculate Time for Tapping
Calculate Time for Threading
Number Of Cuts for Internal Threads = 32 x Pitch
Number Of Cuts for Internal Threads = 25 x Pitch
1.
Cutting Speed(CS) of a material is the ideal number of Feet-per-Minute that the tool-bit should pass over the work-piece. This "Ideal" cutting speed assumes sharp tools and flood coolant. Adjustments need to be made for less than ideal cutting conditions. Different materials (High-Carbon/Low-Carbon Steels, Aluminums, Different kinds of Plastics) have different Cutting Speeds and can be worked/cut at different rates. In addition, some tools or processes (like threading, knurling, or cutting-off) will need to be worked at slower speeds than the Cutting Speed would indicate.
Feed Rate(Lathe) refers to how fast a lathe-tool should move through the material being cut. This is calculated