Milling · Turning - Komet Group

1
Circular milling, external
AT
s' 1
AZ
R
r
ar
R+r–ar
R = workpiece radius in mm
r = milling cutter radius in mm
ar = radial cutting depth in mm
= approach angle in °
hm = average chip thickness in mm
n = spindle speed in min –1
z = number of teeth (effectively cutting)
cos () =
r 2 + ( R + r – ar ) 2 – R 2
2r ( R + r – ar )
L
=
× 2r ×
360°
(mm)
Approach length
AZ
=
L × hm
(mm 2 )
Chip cross section
AT = [ R 2 – ( R – ar ) 2 ]
AT
t =
n × z × AZ
× 2 ( R + r – ar )
s' 1
=
t
(mm 2 )
(min)
(mm/min)
Total surface cut
Cutting time for AT
Feed speed tool centre
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