Общий каталог Sumitomo 2018 - 2019 - страница 561

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Parts of a Milling Cutter

Cutter Body

Back locating face

Clamp

External diameter of cutter body External diameter of boss Hole diameter Width of key way Depth of key way Axial rake angle

Approach Setting ring angle Front relief True rake

angle angle A Inclination

Screw angle Insert Chip pocket Relief

Diameter of cutter angle Locator Section A

Setting ring Wiper flat Major cutting edge clearance angle Inward dish Chamfered corner Radial rake angle (if trail angle) or wiper flat (if 0°)

Power Requirement

l Calculating cutting force l Relation between feed rate, work material, specific cutting force

d. w . v. K
P =ococf c(kW)Work-–––s––– – – – – ––– 5––– – – l – –
c6010ηpiece
5 65AlloyCarbon CastAluminum
No.steelsteel ironalloy
j1.800 800200–
k1.400 600160–
P : Net power requirement (kW)l1.000 400120–
Horsepowerc
lH : Horsepower requirement (HP)
PcValues in the table show the following properties:
H =Q : Chip removal amount (cm3/min)- Tensile strength (N/mm 2) for alloy steel
0,75and carbon steel
w: Cutting width (mm)- Hardness (H ) for cast iron

oc B v : Feed speed (mm/min) f d : Depth of cut (mm)

l Chip removal amount oc η : Machine efficiency (0,70~0,85)

d oc 5 w oc 5 v f (cm /min) K : Specific cutting forrce (N/mm )

Q = 3 c 2

1.000 Eg. rough value ( ) Steel : 2.500 ~ 3.000 Cast iron : 1.500

Feed rate (mm/tooth)

l Calculating cutting speed

πDn
v =55
c1.000
v :Cutting speed (m/min)
c
π ≈ 3,14v
f
l Calculating feed rateD :Cutter diameter (mm)
n: Rotation speed (rpm)
v = fznv: Feed speed (mm/min)
ft 55f
f: Feed rate (mm/tooth)
vt
f =fz :Number of teeth
tzn

Technical Guidance v f f