1098 Каталог KORLOY 2016 Металлорежущий инструмент и станочная оснастка ENG Стр.L31

Каталог KORLOY 2016 Инструмент и оснастка Стр. L31 1098 ENG Lab2u

Drills L Major cutting formulas Cutting speed VC n D n 1000 (m/min) VC D n n Cutting speed (m/min) Drill diameter (mm) Revolution per minute (min-1) Circularconstant (3.14) Feed Helix angle fn - “Vp (mm/rev) fn Feed per revolution (mm/rev) vf Feed per minute (mm/min) n Revolution per minute (min-1) 5=tan-1 (“L0) 5 Helix angle D Drill diameter (mm) L Lead (mm) n Circularconstant (3.14) Cutting torque and thrust(calculation formulas) Machining time tc= Id n-fn (min) Machining time (min) Revolution per minute (min-1) Drilling time (mm) Feed (mm/rev) Md = KD2x(0.0631+1.686xfn)(kg-cm) T = 57.95KDfn°'s(kg) Md Cutting torque (kg-cm) T Cutting thrust (kg) D Drill diameter (mm) fn Feed per revolution(mm/rev) K Material coefficient Workpiece material(SAE/AISI) Tensile strength(kgf) Hardness(HB) Material coefficient K Cast iron Cast iron (Gray) 21 177 1.00 Cast iron 28 198 1.39 Cast iron (Ductile) 35 224 1.88 General steel 1020(carbon steel C 0.2%) 55 160 2.22 1112(C 0.12, S 0.2%) 62 183 1.42 1335(Mn1.75%) 63 197 1.45 Nickel Chro me steel 3115 (Ni 1.25, Cr 0.6, Mn0.5) 53 163 1.56 3120 (Ni 1.25, Cr0.6, Mn0.7) 69 174 2.02 3140 88 241 2.32 Chrome molybdenum steel 4115 (Cr 0.5, Mo 0.11, Mn 0.8) 63 167 1.62 4130 (Cr 0.95, Mo 0.2, Mn 0.5) 77 229 2.10 4140 (Cr0.95, Mo 0.2, Mn 0.85) 94 269 2.41 Nickel molybdenum steel 4615 (Ni 1.8, Mo 0.25, Mn0.5) 75 212 2.12 4820 (Ni 3.5, Mo 0.25, Mn0.6) 140 390 3.44 Chrome steel 5150 (Cr0.8, Mn 0.8) 95 277 2.46 Chrome vanadium steel 6115 (Cr 0.6, Mn 0.6, V 0.12) 58 174 2.08 6120 (Cr0.8, Mn 0.8, V 0.1) 80 255 2.22 Cutting torque and thrust (empirical formula) Md- Krd2, fnm Md:Cuttingtorque g-cm) 'fniFeedfmm/rev) d:Drilldiameter(mm) T= K2d fnn T: Thrust g) K1,K2,m,n: Experimental Data Characteristic value Workpiece K1 m K n Soft steel 5.9 1.00 125.0 0.88 Rolled steel 3.5 1.00 55.0 0.88 7-3 brass 2.5 0.94 44.4 0.87 Aluminum 1.5 0.90 33.3 0.78 Zinc 1.4 0.88 27.0 0.74 Gun metal 2.0 0.94 21.6 0.75 Galvanized Iron 0.3 0.57 6.4 0.55 Technical Information 31