Каталог Iscar вращающийся инструмент 2017 - страница 601
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General - Calculations
Spindle Speed (min-1) Power Requirement (kW)
vc •1000 Q f = Feed/rev mm/rev
n= Pc= kc sin k
π D 60.000 η kc = Material specific
Cutting Speed (m/min) Torque (Nm) cutting force N/mm2
h = Distance from drill
π D n f kc D2 point to workpiece mm
vc = Mc= sin k•km
1000 1000 8 before feeding
Table Feed (mm/min) Feed Force (approx.) (N) L = Depth of hole mm
CMh = Cost/machine hour $/h
Ff = 0.63 D •f•kc•sin k•kf η = Machine efficiency %
vf = f n
2 k = 90º }180° bottom drills
Material Removal Rate (cm3/min) Machining Time (min/piece) sin k = 1 DR...
k = 70º }140° point angle drills vf π D2 L+h
Q= Tc = sin k = 0.94 SCD.., DCM.., DCN..
4000 vf Drill Geometry Coeficient
Machining Cost ($/piece) DCM DCN SCD
km 1 0.85 0.85
CMh
Cc= •Tc kf 1 0.85 0.85
60 Example kc Values
Drill DR 220-044-25-07-2D-N (Ø22 mm) k=90º; sin k=1 Material Group kc Value
| Material No. 4 | kc=2200 N/mm2 | CMh=50 $/h | η=0.75 | 1 | 2000 |
| vc=200 m/min | f=0.15 mm/rev | L=25 mm h=10 mm | 2 | 2100 |
3 2150
km=1 kf=1 4 2200
5 2200 6 2100
| n= vc 1000 | = 200 •1000 | =2894 min-1 | 7 | 2100 | ||
| π D | π 22 | 8 | 2100 |
9 2100 10 2500
vf = f n=0.15 2894=434 mm/min 11 3250
12 2300 13 2800 14 2600
| Q= vf π D2 = 434 3.14 (22)2 =165 cm3/min | 15 | 1100 | ||
| 4000 | 4000 | 16 | 1300 |
17 1100 18 1800
| Pc= | Q | kc sin k= | 165 | 2200 1 =8.06 kW | 19 | 900 | |
| 60.000 η | 60.000 0.75 | 20 | 1000 |
21 500
| f kc | 0.15 2200 | 22 | 800 | ||||||
| Mc= | D2 sin k= | 222 1• 1=20 Nm | 23 | 800 | |||||
| 1000 | 8 | 1000 | 8 | 26 | 700 |
27 700
| D | 22 | 28 | 1700 | |||
| Ff=0.63 | f kc sin k= 0.63 | •0.15 2200 •1• 1=2286 N | 31 | 3000 | ||
| 2 | 2 | 32 | 3100 |
33 3300
| L+h | 25+10 | 34 | 3300 | |||
| Tc = | = | = 0.08 min/piece | 35 | 3200 | ||
| vf | 434 | 36 | 1700 |
37 1700
| CMh | 50 0.08 | 38 | 4600 | ||||
| Cc= | •Tc = | =0.067 $/piece | 39 | 4700 | |||
| 60 | 60 | 40 | 4600 |
4 1 4500 For material groups, see pages 1008-1043
GYRO Auxiliary Devices for Lathe Machines
Designed to Correct Misalignment on Stationary Operation
T.I.R. max. 0.02
- Drills can be used on sloped surfaces up to 6°. When drilling sloped surfaces of more than 6°, reduce feed by 30-50% during penetration of up to 5 mm depth; or use a spot or pre-hole drill to avoid drill deviation or poor drill performance.
Angular Adj. 1°
Radial Adj. D2.0