Общий каталог Tungaloy 2020 - 2021 - страница 1650

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Calculating power requirement

Because practical power requirements depend on the type of mill (proportional to the true rake angle) and the motor efficiency of the machine used, the result calculated from the above formula should be considered as a rough guide. Values of specifi c cutting force (k ) c

Pc : Net power requirement (kW) kc : Specifi c cutting force (N/mm 2) [Refer to the Table below] ap : Depth of cut (mm) a e : Width of cut (mm) v : Feed speed (mm/min) f

Workpiece materialTensile strengthVa ilue of specifi c cuttii ng force on feedper toothkc (N/mm2)
(JIS)MPa0.1 (mm/t)0.15 (mm/t)0.2 (mm/t)0.3 (mm/t)0.4 (mm/t)
SS40052021502000190017501650
S55C77019701860180017601620
SCM43573024502350220019801710
SKT4(HB352)20302010181016801590
SC45052027102530241022402120
FC250(HB200)16601450132011501030
Al(Si)200660580522460410
Brass5001090960877760680

Values of cutting force (k ) c 1800 Principal force fy 1600 Feed force fx Back force fz 1400 1200 1000 800 fz

600fxfy
400
200
v
0f

-200 TGP4100 TGP4200 TGD4400 THF4400 TSP4000 TSE4000 TGN4200 TRD6000

Workpiece material : S50C (210HB), Diameter of mill : ø160 mm Cutting speed : Vc = 150 m/min, Feed per tooth: fz = 0.20 mm/t Depth of cut: ap = 3 mm, Cutting by a single edge, dry Conversion from cutting speed to number of revolutions (unit : min-1)

Cutter diameterCuttingspeed( vc )m/min
DC, DCX (mm)1030501001251502003005008001,0002,0004,000
103189551,5923,1843,9804,7776,3699,55415,92325,47731,84763,694127,388
122657961,3262,6533,3173,9805,3077,96113,26921,23126,53953,078106,157
161995979951,9902,4882,9853,9805,9719,95215,92319,90439,80879,617
201594777961,5921,9902,3883,1844,7777,96112,73815,92331,84763,694
251273826361,2731,5921,9102,5473,8216,36910,19112,73825,47750,955
301063185301,0611,3261,5922,1233,1845,3078,49210,61521,23142,462
32992984979951,2441,4921,9902,9854,9767,9619,95219,90439,808
35902724549091,1371,3641,8192,7294,5497,2799,09918,19836,396
40792383987969951,1941,5922,3883,9806,3697,96115,92331,847
50631913186367969551,2731,9103,1845,0956,36912,73825,477
63501512525056317581,0111,5162,5274,0445,05510,11020,220
80391191993984975977961,1941,9903,1843,9807,96115,923
10031951593183984776369551,5922,5473,1846,36912,738
12525761272543183825097641,2732,0382,5475,09510,191
1601959991992482983985979951,5921,9903,9807,961
2001547791591992383184777961,2731,5923,1846,369
2501238631271591912543826361,0191,2732,5475,095
3151030501011261512023035058081,0112,0224,044

Note: In this table, the eff ects of centrifugal force on the rotating balance of the tool and the toolholder, fl ying risk of cutter parts, and limited value of toolholder destruction are not considered. Therefore, when using the tool at high speeds, be sure to observe the specifi ed condition range.