Основной каталог Kyocera 2021 - 2022 - страница 1068

Предыдущая страница Следующая страница

Навигация

Basic formulas Turning Cutting speed n π x Dm x n Dm 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 ap : Depth of cut [mm] Low alloy steel 190 Ks x Vc x ap x f PHP = High alloy steel 245 4,500 x η f : Feed rate [mm/rev] Cast iron 93 KS : Specific cutting force [kgf/mm2] Malleable cast iron 120 η : Mechanical efficiency (0.7 ~ 0.8) Bronze, brass 70 Theoretical surface roughness Rz(h): Theoretical surface roughness [μm] f2 Rz(h) = x 1,000 f : Feed rate [mm/rev] 8 x R(RE) E) Rz(h) R(R 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) Technical information ⊿Z EPSR { { EPSR cos ( 2 + ( KRINS - 90° ) ) KRINS = (R - R’ ) x -1 R(RE) sin EPSR 2 { { ⊿X EPSR sin ( 2 + ( KRINS - 90° ) ) = (R - R’ ) x -1 sin EPSR R’(RE’) 2 Insert corner angle Cutting edge angle : X-direction cutting edge offsets [mm] Toolholder type EPSR KRINS X Z : Z-direction cutting edge offsets [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