Общий каталог Widia 2017 - страница 1786

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High-Performance Thread Mills CNC Programming Instructions Drill Thread Mill GTM41 • Left Hand Preparation None Process Principle Milling thread and core hole, countersinking (climb milling) Cycle Positioning Moving sideways tothe starting point Thread milling(anti-clockwise) Exit Returning topositioning level Required Specification Values Example Size — M10-6H Tool — GTM41 Left HandThread diameter D.........................................10mmCatalogue number ................................................GTM415005 N = Vc • 1000 S = 4109 Pitch ............................................................. 1,5mm Number of teeth Z..................................................................4 d1 • / Core hole diameter D1 ..................................8,5mmMaterial — TiAl6V4 titaniumGrade — WU16PVTool Tool draiadmiuestceor md1p.e..n.s..a..t.i.o..n...k..1.........................................................................0.7,0,785mmmm***Tool radius to be programmed2 ............................3,795mm***vf =fz • Z • nF = 493 (contour) Thread depth b ..............................................................20mm Cutting speed vc..................................................... 100 m/minFNeuemdb(emrilolifntgu)rnfzs.5.............................................................................................0..,.0..3...m...m.../.t.o..o1t7hN=vf contour • (D-d1)DF = 111(centre point) *(measured on the cutting part) **(0.01 x D) ***(1/2 d1 - k) Program to DIN 66025 (climb milling, on the contour, incremental) Positioning the tool N 10 G 54 G 90 G 00 X… Y… Z 1.500 S 4109 T01 2 M04 Incremental programming N 20 G 91 Moving sideways to the starting point N 30 G 42 G 01 X0 Y-5 F 493 (contour) [F 111] 4 (centre point) Thread milling N 40 G 02 X0 Y0 Z-1.500 I0 J 5.000 Repeat thread milling …5 Exit N 50 G 40 G 01 X0 Y5 Retracting tool to positioning level N 70 G 90 G 00 Z2 Cutting time th 68.8 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 thread depth b must be divisible by the thread pitch P. 4 The feed values in brackets must be used for controllers, which do not calculate the centre point feed themselves. 5 Set N40 must be repeated with the number of threads. Repetitions N = thread depth b/pitch P (rounded up to the nearest integer). Y82 widia.com High-Performance Thread Mills