Техническая информация Sumitomo - страница 7

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  • Parts of a Milling Cutter

Body

Body diameter Boss diameter Hole diameter Keyway width

Keyway depth Corner angle

Axial rake angle

Ring Approach Angle Reference ring

True rake Cutting edge inclination

Face angle angle angle

Clamp bolt relief Indexable insert A Chip pocket

Peripheral Cutter diameter (nominal diameter) relief angle

Locator Clamp A

Reference ring Face cutting edge angle Radial rake angle Face cutting edge (Wiper cutting edge)

External cutting edge (Principal cutting edge) Chamfer

  • Milling Calculation Formulas

Calculating Cutting Speed

π × DC × n Work DC

v =Cuttermaterial
c1,000
v : Cutting speed (m/min)
c

1,000 × v π : ≈ 3.14 n v

n = c f

π × DC DC : Cutter diameter (mm) n

  • Calculating Feed Rate n : Rotational speed (min-1)

v : Feed rate per minute (mm/min)

v =f × z × n f

f z f : Feed rate per tooth (mm/t)

z v z : Number of teeth f = f z z × n

vf fz

  • Power Requirement
  • Relation Between Feed Rate, Work Material, Specific Cutting Force

a × a × v × k Q × k Symbol

P =epfc =c
c60 × 10ηηWork Material Alloy Steel Carbon Steel Cast Iron Aluminium Alloy
6 ×60 × 103 ×10.000No.
(1)1.80.8200Q
(2)1.40.6160Q
(3)1.00.4120Q
P: Power requirement (kw)
c8.000Figures in table indicate these characteristics.
●H : Required horsepower (HP)· Alloy steel and carbon steel: Traverse rupture strength σ B(GPa)
Horsepower Requirement· Cast iron: Hardness HB
Q : Chip removal amount (cm3/min)
P6.000
H =ca : Cutting width (mm)
0.75e
v : Feed rate (mm/min)
f
a: Depth of cut (mm)4.000

p k : Specific cutting force (MPa) c ( )

  • Chip Removal Amount

Rough value Steel: 2,500 to 3,000MPa

2.000 N

a × a × v Cast iron: 1,500MPa

Q =epf
1,000Aluminium: 800MPa

η : Machine efficiency (about 0.75) 0 0.1 0.2 0.4 0.6 0.8 1.0

0.04 Feed Rate (mm/t)