Общий каталог Sumitomo 2018 - 2019 - страница 569

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Technical Guidance Power (kW) Thrust (N) Technical Guidance Basics of Drilling Reference of Power Requirement and Thrust 8 12.000 f = 0,3 10.000 6 f = 0,3 f = 0,2 8.000 f = 0,2 4 6.000 f=01 4.000 f = 0,1 2 2.000 Work material: 0 10 20 30 40 0 10 20 30 40 C48 (220HB) Diameter (mm) Diameter (mm) Cutting Condition Selection Control cutting force forlow rigid machineThe following table shows the relation between edge treatment width and cutting force. If a problem caused bycutting force occurs, reduce either the feedrate or the edge treatment width. Condition Edge treatment width Drill : ø10Work material: 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 machiningrecommendationWhen there is surplus capacity with enough machine power and rigidity drilling at normal recommendedcutting conditions, we recommend higher drilling speeds. Wear example f Flank g face 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) Shape used on most drills 4-point guiding reduces hole bendingand undulation for improved stability and accuracy during deep hole drilling. N14