Общий каталог Widia 2017 - страница 1787

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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 andcountersinking Raise Run-in loop forthread millingThread milling Run-out loop Returning topositioning level Required Specification Values Example Size — M10-6H Tool — GTM31Thread diameter D.........................................10mmCatalogue number ................................................GTM315005 N =Pitch ............................................................. 1,5mmNumber of teeth Z..................................................................2Vc • 1000d1 • /S = 9709 Core hole diameter D1 ..................................8,5mmMaterial — Grey cast ironGrade — WU12PVTool Tool draiadmiuestceor md1p.e..n.s..a..t.i.o..n...k..1.............................................................................0.8,1,2mmmm***Tool radius to be programmed2 ...................................4mm***vs =fb • nF = 2427 (drilling, countersinking) Countersink depth ls.................................................19,11mmCutting speed vc..................................................... 250 m/minvf = fz • Z • n F = 1942 (contour) Feed (countersinking) fs..........................................0,25 mm/U *(measured on the cutting part) Feed (milling) fz .................................................. 0,1 mm/tooth**(0.01 x D)***(1/2 d1 - k) vf contour • (D-d1)vf =DF = 350(centre point) Program to DIN 66025 (climb milling, on the contour, incremental) Positioning the tool N 10 G 54 G 90 G 00 X… Y… Z2 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 X0 Y 9.250 Z 0.750 I0 J 4.625 Thread milling N 60 G 03 X0 Y0 Z 1.500 I0 J -5.000 Run-out loop in arc N 70 G 03 X0 Y-9.250 Z 0.750 I0 J- 4.625 F1942 [F 350] 3 (centre point) Exit N 80 G 00 G 40 X0 Y 4.250 Retracting tool to positioning level N 90 G 90 Z2 Cutting time th 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. widia.com Y83 High-Performance Thread Mills