Technical Information
Milling General Formula ● Cutting speed
● Power demand
π * Dc * n
ap * ae * Vf * Kc
Vc =
(m/min)
Pmot =
(KW)
6 * 10 7 * η
1000
Vc:Cutting speed(m/min) π: ≈3.14 Dc:Cutter diameter(mm) n:Spindle speed(rev/min)
Pmot:Cutting power(KW) ap:Cutting depth ae:Cutting width Kc:Unit cutting force(N/mm²) η:Machine efficiency coefficient(0.7-0.95)
● Spindle speed
● Average chip thickness
1000 * Vc
114.7 * fz * sink * (ae/Dc)
n =
(rev/min)
hm =
(mm)
ψ
π * Dc
s
hm:Average chip thickness fz:Feed per tooth(mm/z) ae:Cutting width Dc:Cutter diameter(mm)
Vc:Cutting speed(m/min) π: ≈3.14 Dc:Cutter diameter(mm)
ψs:Pressure angle
n:Spindle speed(rev/min)
● Feed speed
● Feed force
Vf = fz * n * Z (mm/min)
Cutter in the center site
ψ
ae Dc
s = 2 * arcsin (
) [ ° ]
Vf:Feed speed(mm/min) n:Spindle speed(rev/min)
fz:Feed per tooth(mm/z)
Z:Number of teeth
Cutter in excentric site
● Feed rate per rev.
ae-(Dc/2)
ψ
s = 90 ° +arcsin
[ ° ]
Vf
(Dc/2)
fz =
(mm/z)
n * Z
fz:Feed rate per rev.(mm/z) n:Spindle speed(rev/min)
Vf:Feed speed(mm/min)
ψs:Pressure angle ae:Cutting width Dc:Cutter diameter(mm)
Z:Number of teeth
● Feed rate per rev.
● Chip removal
Vf
f =
(mm/rev)
n
ap * ae * Vf
(cm 3 /min)
Q =
f:Feed rate per rev.(mm/rev) Vf:Feed speed(mm/min) n:Spindle speed(rev/min)
1000
Q:Chip removal(cm³/min)
ap:Cutting depth
● Time of cut
ae:Cutting width
Vf:Feed speed(mm/min)
L
Tc =
(min)
Vf
Tc:Time of cut(min)
L:Length of feed(mm)
Vf:Feed speed(mm/min)
● Horse power
n
Pmot
Hp =
ap
f
0.75
Hp:Horse power
Pmot:Cutting power(KW)
489
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