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. Pc = Net cutting power KW. De = Effective cutting diameterVc=Cutting speedQ=Metal removal rateI=Machined lengthmm.m/mm.kr=Major cutting edge deg.cm3/min.Vco=Constant for cutting speedmm.Cvc=Correction factor for cutting speedmin-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 Cutting speed Vc = π x Dc x n = m/min. Spindle speed1000 n= Vc x 1000π x Dc=min.-1 Feed speed Vf = fz x n x zn = mm/min. Feed per tooth fz = Vf = mm.n x zn Feed per revolution f= Vfn = mm/rev. Metal Removal rate Q= ap x ae x Vf = cm3.1000 Specific cutting force kc = kc1 x hnm-mc= mm/min. Effective cutting diameter De = 2 x ap x (Dc-ap) = mm. Average chip thickness(side & facemilling)hm = fz ae = mm. Net powerwhen ae / Dc≤ 0.1Dc Pc = ap x ae x Vf x kc = kW60 x 106 x nmt Average chip thicknesswhen ae / Dc≥ 0.1hm =sin kr x 180 x ae x fz= mm.π x Dc x arcsin ( ae Dc )Cutting timeTc =l = min.Vf Dc Dc F007