Общий каталог Sumitomo 2018 - 2019 - страница 569

Technical Guidance Basics of Drilling Reference of Power Requirement and Thrust 8 12.000 f = 0,3 10.000 6 f = 0,3 Power (kW) 8.000 Thrust (N) f = 0,2 f = 0,2 4 6.000 f=01 4.000 f = 0,1 2 2.000 Work material: 0 0 C48 (220HB) 10 20 30 40 10 20 30 40 Diameter (mm) Diameter (mm) Cutting Condition Selection Control cutting force for The following table shows the relation between edge treatment width and cutting force. If a problem caused by low rigid machine cutting force occurs, reduce either the feedrate or the edge treatment width. Drill : ø10 Edge treatment width Work material: Condition 0,15mm 0,05mm C50 (230HB) vc (m/min) f (mm/rev) Torque (N• m) Thrust (N) Torque (N• m) Thrust (N) 40 0,38 12,8 2.820 12,0 2.520 50 0,30 10,8 2.520 9,4 1.920 60 0,25 9,2 2.320 7,6 1.640 60 0,15 6,4 1.640 5,2 1.100 High speed machining When there is surplus capacity with enough machine power and rigidity drilling at normal recommended recommendation cutting conditions, we recommend higher drilling speeds. Wear example f Flank face g Margin f Rake face Vc=60m/min Vc=120m/min Work material: C50 (230HB) Cutting data: f = 0,3 mm/rev doc = 50mm Tool life: 600 holes (Cutting length : 30m) Explanation of Margins (Difference between single and double margins) Single Margin (2 guides: circled parts) D Double Margin (4 guides: circled parts) Technical Guidance Shape used on most drills 4-point guiding reduces hole bending and undulation for improved stability and accuracy during deep hole drilling. N14