
USER GUIDE DEEP DRILLING - BTA SYSTEM Technical Guide STS - Setting guidelines for cutting loads, fluid DTS - Setting guidelines for cutting loads, fluid pressure and flow rate during STS operation pressure and flow rate during DTS operation Net power Net power 25 25 20 20 Vc = 100 m/min Vc = 100 m/min f = 0.25 mm/rev f = 0.25 mm/rev 15 15 Pc (kW) Pc (kW) 10 10 5 5 Vc = 70 m/min Vc = 70 m/min f = 0.15 mm/rev f = 0.15 mm/rev 0 10 20 30 40 50 60 70 0 10 20 30 40 50 60 70 Drill dia. (mm) Drill dia. (mm) Feed force Feed force 15 15 Vc = 100 m/min Vc = 100 m/min f = 0.25 mm/rev 10 f = 0.25 mm/rev 10 Ff (kN) Ff (kN) 5 5 Vc = 70 m/min Vc = 70 m/min f = 0.15 mm/rev f = 0.15 mm/rev 0 10 20 30 40 50 60 70 0 10 20 30 40 50 60 70 Drill dia. (mm) Drill dia. (mm) Torque Torque 0.5 0.5 0.4 0.4 Vc = 100 m/min f = 0.25 mm/rev Vc = 100 m/min 0.3 0.3 f = 0.25 mm/rev T (kNm) T (kNm) 0.2 0.2 0.1 0.1 Vc = 70 m/min Vc = 70 m/min f = 0.15 mm/rev f = 0.15 mm/rev 0 10 20 30 40 50 60 70 0 10 20 30 40 50 60 70 Drill dia. (mm) Drill dia. (mm) Coolant pressure Coolant pressure 2 10 1MPa = 1.0 N/mm2 1MPa = 1.0 N/mm2 1Mpa ≈ 10 atm 8 1Mpa ≈ 10 atm 1.5 6 P (MPa) P (MPa) 1 4 0.5 2 0 10 20 30 40 50 60 70 0 10 20 30 40 50 60 70 Drill dia. (mm) Drill dia. (mm) Coolant volume Coolant volume 200 400 150 300 q (l/min) 100 q (l/min) 200 50 100 0 10 20 30 40 50 60 70 0 10 20 30 40 50 60 70 Drill dia. (mm) Drill dia. (mm) The above values should not be used as the exact recommendations. They may need modification depending on the machining conditions, materials, etc. 208 ISCAR