Общий каталог Dijet 2018 - страница 551

Tooling by DIJET Terminology and Formulas (for milling) Dc = Cutting diameter mm. Zc = Effective number of teeth ae = Width of cut mm. hex = Max chip thickness mm. ap = Depth of cut mm. hm = Average chip thickness mm. f = Feed rate per revolution mm/rev. kc1 = Specific cutting force (hex = mm) N/mm2. fz = Feed rate per tooth mm/t. KW. Pc = Net cutting power De = Effective cutting diameter mm. deg. kr = Major cutting edge Vc = Cutting speed m/mm. cm3/min. Vco = Constant for cutting speed Q = Metal removal rate I = Machined length mm. Cvc = Correction factor for cutting speed min-1 . Vf = Feed speed mm/min. n = Spindle speed KW Dap = Max cutting diameter at specific depth mm. nmt = Efficiency Zn = Total number of edges in the tool mc = Rise in specific cutting force (kc) as a function of chip thickness General formulas π x Dc x n Cutting speed Vc = = m/min. Spindle speed n = Vc x 1000 = min.-1 1000 π x Dc Feed speed Vf = fz x n x zn = mm/min. fz = Vf = mm. Feed per tooth n x zn Q = ap x ae x Vf = cm3. Feed per revolution f = Vf = mm/rev. Metal Removal rate 1000 n Specific cutting force kc = kc1 x hnm-mc= mm/min. Effective cutting diameter De = 2 x ap x (Dc-ap) = mm. Average chip thickness ae (side & facemilling) hm = fz = mm. Net power Pc = ap x ae x Vf x kc = kW when ae / Dc ≤0.1 Dc 60 x 106 x nmt Average chip thickness Tc = l = min. hm = sin kr x 180 x ae x fz = mm. Cutting time Vf when ae / Dc ≥ 0.1 π x Dc x arcsin ( Daec ) Dc Dc F007