Achteck - obecný katalog

Technical Information

Drilling General Recommendation

● Cutting speed

● Horse power

π * Dc * n

Pmot

Vc =

(m/min)

Hp =

1000

0.75

Vc:Cutting speed(m/min) π:≈3.14 Dc:Drill diameter(mm)

Hp:Horsepowe

Pmot:Cutting power(KW)

n:Spindle speed(rev/min)

● Spindle speed

● Power demand

1000 * Vc

n =

(rev/min)

Φ Dc

π * Dc

Q * Kc 60000 * η

Vc:Cutting speed(m/min) π: ≈3.14 Dc:Drill diameter(mm)

Pmot =

(KW)

n:Spindle speed(rev/min)

Pmot:Cutting power(KW)

Q:Chip removal(cm³/min)

● Feed speed

Kc:Unit cutting force(N/mm²) η:Machine efficiency coefficient (0.7-0.95)

Vf = fz * n * Z (mm/min)

● Torque

Vf:Feed speed(mm/min) n:Spindle speed(rev/min)

fz:Feed per tooth(mm/z)

Z:Number of teeth

Dc 2 * Kc * f

Mc =

(N*m)

8000

● Feed rate per rev.

Mc:Torque Dc:Drill diameter(mm) Kc:Unit cutting force(N/mm²) f:Feed rate per rev.(mm/rev)

Vf

fz =

(mm/z)

n * Z

fz:Feed per tooth(mm/z) Vf:Feed speed(mm/min) n:Spindle speed(rev/min) Z:Number of teeth

● Feed force

f * Dc * Kc

● Feed rate per rev.

f

Ff = 0.63 *

(N)

2

Vf

Ff:Feed force

f:Feed rate per rev.(mm/rev) Kc:Unit cutting force(N/mm²)

f =

(mm/rev)

Dc:Drill diameter(mm)

n

f:Feed rate per rev.(mm/rev)

Vf:Feed

speed(mm/min)n:Spindle speed(rev/min)

● Cutting thickness

● Chip removal

Vf * π * Dc 2

h = fz * sink (mm)

(cm 3 /min)

Q =

4 * 1000

h:Cutting thickness(mm)

fz:Feed rate(mm/rev)

Q:Chip removal(cm³/min) Vf:Feed speed(mm/min) π:≈3.14 Dc:Drill diameter(mm)

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