Основной каталог Kyocera 2021 - 2022 - страница 1068

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Technical information Dm R(RE) Rz(h) Basic formulas Turning Cutting speed n π x Dm x n Vc = 1,000 Vc : Cutting speed [m/min] Dm : Workpiece dia. [mm] n : Spindle revolution [min-1] L Power requirement Ks [kgf/mm2] Ks x Vc x ap x f Pc : Power requirement [kW] Pc = Low carbon steel 190 6,120 x η PHP : Power requirement (Horse power) [HP] Medium carbon steel 210 Vc : Cutting speed [m/min] High carbon steel 240 Ks x Vc x ap x f ap : Depth of cut [mm] Low alloy steel 190 PHP = 4,500 x η f : Feed rate [mm/rev] High alloy steel 245 Cast iron 93 KS : Speci c cutting force [kgf/mm2] Malleable cast iron 120 η : Mechanical e ciency (0.7 ~ 0.8) Bronze, brass 70 Theoretical surface roughness f2 Rz(h): Theoretical surface roughness [μm] Rz(h) = x 1,0008 x R(RE) f : Feed rate [mm/rev] f R(RE): Corner radius of insert [mm] Chip removal volume Q : Chip removal volume [cm3/min=cc/min] Q = Vc x ap x f Vc : Cutting speed [m/min] R ap : Depth of cut [mm] f : Feed rate [mm/rev] Edge position compensation when changing corner-R(RE) = (R - R’ ) x {cos ( EPSR 2 + ( KRINS - 90° ) )sinEPSR2-1 ⊿ZKRINS EPSRR(RE) = (R - R’ ) x { sin ( EPSR 2 + ( KRINS - 90° ) )sinEPSR2-1 ⊿XR’(RE’) : X-direction cutting edge o sets [mm] Toolholder type Insert corner angle Cutting edge angleEPSRKRINS X Z : Z-direction cutting edge o sets [mm] DCLN/PCLN 80° 95° 0.100 x (R-R’) 0.100 x (R-R’) DTGN/PTGN 60° 91° 0.714 x (R-R’) 0.030 x (R-R’) R : Corner-R before change [mm] DDJN/PDJN 55° 93° 0.866 x (R-R’) 0.099 x (R-R’) R’ : Corner-R after change [mm] DDHN/PDHN 55° 107.5° 0.531 x (R-R’) 0.531 x (R-R’) DVLN/PVLN 35° 95° 2.072 x (R-R’) 0.273 x (R-R’) EPSR : Insert corner angle [° ] DVPN/PVPN 35° 117.5° 1.351 x (R-R’) 1.351 x (R-R’) KRINS : Toolholder's cutting edge angle [° ] DSBN/PSBN 90° 75° 0.225 x (R-R’) -0.293 x (R-R’) Example: Compensation when changing corner-R from 0.8 to 0.4, using PCLN toolholder, X=0.100 x (0.8-0.4)=0.04(mm) Z=0.100 x (0.8-0.4)=0.04(mm) R40 { {