Техническая информация Sumitomo - страница 15

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Basics of Drilling

  • Reference of Power Requirement and Thrust
10 20 30 0 2 4 6 8 f=0.3 f=0.2 f=0.1 Diameter øDC (mm) Power (kw)40 10 20 30 40 0 12,000 10,000 8,000 6,000 4,000 2,000 f=0.3 f=0.2 f=0.1 Diameter øDC (mm) Thrust (N)f: Feed rate (mm/rev) Work material: S48C (220HB)
he following table shows the relati aused by cutting force occurs, reduc Cutting Conditions 0.15mon between edge treatment width and cutt e either the feed rate or the edge treatment w Edge Treatment Width m 0.05mming force. If a problem idth. Drill : ø10mm Work : S50C 230HB
vc(m/min) f(mm/rev) Torque (N·m)Thrust (N) Torque (N·m) Thrust (N)
40 0.38 12.82,820 12.0 2,520
50 0.30 10.82,520 9.4 1,920
60 0.25 9.22,320 7.6 1,640
60 0.15 6.41,640 5.2 1,100
  • Cutting Condition Selection
  • Control Cutting Force for Low Rigid Machine
  • High Speed Machining Recommendation

If there is surplus capacity with enough machine power and sufficient rigidity, adopting higher efficiency conditions would improve the tool life; however, sufficient amount of coolant must be supplied. Wear Example

v =60m/min v =120m/min c c Work : S50C (230HB) Cond.: f = 0.3mm/rev H = 50mm Life : 600holes (Cutting length: 30m)

  • Explanation of Margins (Difference between single and double margins)
  • Single Margin (2 guides: circled parts)
  • Double Margin (4 guides: circled parts)

N

  • Shape used on most drills
  • 4-point guiding reduces hole bending and undulation for

improved stability and accuracy during deep hole drilling.