Каталог Iscar вращающийся инструмент 2017 - страница 539

USER GUIDE INDEXABLE DRILLS Machining Conditions Machine Power and Feed Force Requirements Power required, in relation to drill diameter Required Machine Power Material: SAE 4140 24 Cutting speed: 100 m/min 22 20 For different cutting speeds, 18 use factor as follows: Power Pe (kW) 16 14 12 10 8 6 Pe · C Vc Machine Power P= [m/min] 100 150 200 4 η 2 C 1.0 1.5 2.0 0 η=Machine efficiency 16 20 24 28 30 34 38 42 46 50 54 58 62 66 70 Drill Diameter D (mm) f=0.25 f=0.18 f=0.1 Feed force (thrust force) required, in relation to drill diameter Required Feed Force 12 Material: SAE 4140 11 10 9 Feed Force (kN) 8 7 6 5 4 3 2 1 0 16 20 24 28 30 34 38 42 46 50 54 58 62 66 70 Drill Diameter D (mm) f=0.25 f=0.18 f=0.1 Internal Coolant Pressure Selecting Coolant Pressure and Flow Rate Coolant Flow Rate (liter/min) Minimum Coolant Pressure (bar) 60 flow 10 rate 9 45 8 7-13 X D 7 30 4.5 X D 6 3XD 5 15 2XD 4 3 16 25 35 45 60 2 Drill Diameter D (mm) 1 16 25 35 45 55 65 Harder, Drill Diameter D (mm) Wear Resistant * For special drills more than 4xD, it is recommended to use high coolant pressure 15–70 bar 535