Техническая информация Sumitomo - страница 11

Technical Guidance
Endmilling Edition Basics of Endmilling

■ Parts of an Endmill
Body Neck Shank
Land width
Cutter sweep Neck Radial relief
diameter Relief width Radial primary
Diameter Margin width relief angle
Shank
diameter Margin Radial secondary
clearance angle
Neck length
Center hole
Length of cut Shank length
Overall length


Center Cut With Center Hole
Rake face Rake angle Helix angle
Land width Flute Corner Radial
Heel cutting edge
Land End cutting edge
End gash
Rounded
flute bottom
Web
Center hole thickness Axial primary relief angle
Flute depth Chip pocket Axial secondary
clearance angle
Concavity angle of Ball radius
end cutting edge (*)
* Center area is lower than the periphery


■ Calculating Cutting Conditions
● Calculating Cutting Speed
(Square Endmill)
Side milling Slotting
π x DC x n 1,000 x vc
vc = n=
1,000 π x DC

● Calculating Feed Rate Per Revolution and Per Tooth
v
vf = n x f f= f
n
f vf ap
vf = n x fz x z fz = = ap
z nxz
DC
DC
ae
(Ball Endmill) ● Calculating Notch Width (D1)
D1= 2 x 2 x RE x ap – ap2
vc : Cutting speed (m/min)
● Cutting speed and feed rate (per revolution
π : ≈ 3.14
and per tooth) are calculated using the
same formula as square endmill.
DC : Endmill diameter (mm)
n : Spindle speed (min-1)
N
Technical Guidance /


vf : Feed rate (mm/min)
References


f : Feed rate per revolution (mm/rev)
DC
ap Depth of cut fz : Feed rate per tooth (mm/t)
RE
RE
ap z : Number of teeth
ap : Axial Depth of Cut (mm)
D1 D1 ae : Radial Depth of Cut (mm)
pf RE : Ballnose Radius
pf Pick feed

N19