Page 572 - Ceratizit Catalog

Formula collection
B245
Formulas and examples

n
Calculation example:

Cutter type: ... A270.40.R.04
Insert: ... SDMT 1204AESN-29R
a p Cutter diameter: ... 40 mm
Ƙ
Effective number of teeth: ... 4
V f Depth of cut a : ... 2 mm
p
Cutting width a : ... 28 mm
e
d 1 f z
Approach angle κ: ... 45°
Axial rake angle γ : ... +13°
p
Radial rake angle γ : ... -6°
f

Selected cutting speed
d 1 v : ... 225 m/min
c
f z
n
a e Calculation of rev number:
h m
225 1000
n = = 1790 min
v f -1
40 π
Selected feed per tooth ... 0.15 mm

Calculation of feed rate:

f v f = 0,15 1790 4 = 1074 mm/min

A - A -γ
B - B
+γ
s
Calculation of chip removal rate:
+ 0 γ C - C
Q = 228 1074 = 60 cm³/min
1000
α
γ
+ p D
C
A Calculation of the perpendicular rake angle:
D - D k
B B
α 1 = arctan cos(90°) tan(13°) = -6°
γ 0 + sin(90°) tan(-6°)

D C
A Medium chip thickness [mm]:
sin(90°) 180 28 0,15
h m = 28 = 0,13 mm
π 40 arcsin( )
40

Specific cutting force 2
Wiper facet
Milling / Technical information l 1 Main cutting edge Power consumption [kW] 1700 = 2,13 kW
1700= 2774 N/mm
0,13
k c =
-0,24
Corner radius or corner facet
2 28
1074
P mot =
0,80
6
10
60