High-Performance Thread Mills CNC Programming Instructions
Drill Thread Mill GTM31
Preparation
Drilling of thread hole
Process Principle Drilling, countersinking, thread milling( climb milling) Cycle
Positioning |
Drilling and countersinking |
Raise |
Run-in loop for thread milling |
Thread milling |
Run-out loop |
Returning to positioning level |
Required Specification Values
Example
Size— M10-6H Thread diameter D......................................... 10mm Pitch............................................................. 1,5mm Core hole diameter D 1.................................. 8,5mm
Material— Grey cast iron Grade— WU12PV
Tool— GTM31 Catalogue number................................................ GTM315005 Number of teeth Z.................................................................. 2 Tool diameter d 1.......................................................... 8,2mm * Tool radius compensation k 1..................................... 0,1mm ** Tool radius to be programmed 2................................... 4mm *** Countersink depth l s................................................. 19,11mm Cutting speed v c..................................................... 250 m / min Feed( countersinking) f s.......................................... 0,25 mm / U Feed( milling) f z.................................................. 0,1 mm / tooth
*( measured on the cutting part) **( 0.01 x D) ***( 1 / 2 d 1- k)
N =
V c • 1000 d 1 • �
S = 9709
v s = |
f b • n |
2427( drilling,
F = countersinking)
|
v f = |
f z • Z • n |
F = 1942
( contour)
|
v f = v f contour •( D-d 1) F = 350( centre point)
D
Program to DIN 66025( climb milling, on the contour, incremental)
Cutting time t h
widia. com
Positioning the tool |
N 10 |
G 54 |
G 90 |
G 00 |
X … |
Y … |
Z 2 |
S 9709 |
T01 2 |
M03 |
Drilling and countersinking |
N 20 |
G 91 |
G 01 |
Z-21.110 |
F 2427 |
( drill, countersink) |
Raise |
N 30 |
G 01 |
Z 0.500 |
|
|
|
Moving sideways to the starting point |
N 40 |
G 41 |
Y-4.250 |
F 971 |
( milling, 1 / 2 contour) |
[ F 175 ] 3( 1 / 2 centre point) |
Run-in loop in arc |
N 50 |
G 03 |
X 0 |
Y 9.250 |
Z 0.750 |
I 0 |
J 4.625 |
|
|
|
Thread milling |
N 60 |
G 03 |
X 0 |
Y 0 |
Z 1.500 |
I 0 |
J-5.000 |
|
|
|
Run-out loop in arc |
N 70 |
G 03 |
X 0 |
Y-9.250 |
Z 0.750 |
I 0 |
J- 4.625 |
F1942 |
[ F 350 ] 3 |
( centre point) |
Exit |
N 80 |
G 00 |
G 40 |
X 0 |
Y 4.250 |
|
|
|
|
|
Retracting tool to positioning level |
N 90 |
G 90 |
Z 2 |
|
|
|
|
|
|
|
2.3 seconds
NOTES: 1 The cutter radius measured over the tooth crests of the threaded part must be reduced by the amount of the cutter radius compensation. This is necessary to achieve a depth of cut to the middle
of the 6H / ISO2 nut tolerance. Please note, however, that this also depends on the radial deflection of the tool( tensile strength of the material, projecting length of the tool). 2 The cutter radius to be programmed is normally included in the tool memory. 3 The feed values in brackets must be used for controllers, which do not calculate the centre point feed themselves.
Y83
High-Performance Thread Mills KL-TECH s. r. o. | www. klte. cz