铣削─切削数据计算式

※Cutting Speed (Vc)

Vc=π×Ds×n/1000
Vc (m/min):Cutting Speed
Ds (mm):Cutter Diameter
π (3.14):Pi
n(min-1):Main Axis Spindle Speed

 2-1

 

※Feed rate (fz)

fz= Vf/Zxn

fz(mm/t):Feed per tooth
Vf(mm/min):Feed rate
Z:Number of flutes
n(min-1):Revolution

 2-2

※Cutting Power (Pc)

Pc= (Ks×Q)/(9120×η)
= (Ks×ae×Vf×ap)/(6120000×η)
=(Ks×ae×fz×Z×n×ap)/(6120000×η)
PHP=(6120/4500)×Pc

Pc(kW):Cutting power
PHP(HP):Cutting power
ae(mm):Cutting width
Vf(mm/min):Cutting speed
fz(mm/t):Feed per tooth
Z:Number of flutes
n(min-1):Revolution
ap:Cutting depth
Ks (kgf/mm2):Relative cutting resistance
η(0.7~0.8):Mechanical efficienc
Q(cm3/min=cc/min):Chip removal Volume

 

Approximate rate (Ks)
Mild Steels 190
Medium Steels 210
Hard Steels 240
Light Alloy 190
High Alloy 245
Cast Iron 93
Forging cast iron 120
Bronze / Brass 70

 

※Chip removal Volume (Q)

Q=(ae×Vf×ap)/1000

=(ae×fz×Z×n×ap)/1000

Q (cm3/ min):Chip removal Volume
ae(mm):Cutting width
Vf(mm/min):Cutting speed
fz(mm/t):Feed per tooth
Z:Number of flutes
n(min-1):Revolution
ap (mm):Cutting depth


※CUTTING TIME (T)

T= (60×L′)/Vf = (60×L′)/fz×Z×n

 2-3

T(sec) :Cutting Time
L′(mm):Total table feed length(=L+Ds+2α)
L(mm):Workpiece length
Ds(mm):Cutter diameter
α(mm):Grinder diameter
Vf(mm/min) :Feed rate per minute of table
fz(mm/t):Feed per tooth
Z:Number of flutes
n(min-1):Revolution