Техническая информация Sumitomo - страница 20

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Technical Guidance High Speed Machining of Cast Iron withs SUMIBORON SUMIBORON Edition ■ Advantages of Using SUMIBORON for Cast Iron Machining ● Higher Accuracy ● Longer Tool Life at Higher Cutting Speeds Grey Cast Iron Ductile Cast Iron BNS800 500 Size Accuracy Ceramic Speed (m/min) 1,000 BN7000 Cutting Speed (m/min) BNX10 BNS800 Coated Carbide BN500 BN7000 Cermet BNC500 BNC500 500 200 → Cutting Good Ceramic BN7000 200 Ceramic Coated Carbide Coated Carbide Cermet Cermet 0.4 0.8 1.6 3.2 1 10 20 1 10 Good ← Surface Roughness Ra (μm) Tool Life Ratio Tool Life Ratio ■ Turning ● Cast Iron Structure and Wear Shape Examples Flank Wear Width VB (mm) FC FCD 0.4 Dry Work : FC250 Continuous cutting 10 Wet (Water soluble) Tool material : BN500 Surface Roughness 8 0.3 Tool Shape : SNGN120408 Rmax (μm) Conditions : vc=450m/min 6 Structure 0.2 ap=0.25mm f =0.15mm/rev 4 0.1 Dry&Wet (water soluble) 2 0 2.5 5 7.5 10 12.5 0 200 400 Matrix Pearlite Pearlite + Ferrite Cutting Length (km) Cutting Speed vC (m/min) Tool Wear Shape Wet Machine : N/C lathe Wet Dry Work : FC250 200HB (Water Holder : MTJNP2525 soluble) Tool material : BN500 Tool Shape : TNMA160408 Dry Conditions : vc=110 to 280m/min f =0.1mm/rev Crater wear ap=0.1mm For machining cast iron with SUMIBORON, cutting speeds (vc) should be Wet (vc = 200 to 500m/min) 200m/min and above. WET cutting is recommended. ■ Milling SUMIBORON BN Finish Mill EASY ・High speed machining vc=2,000m/min ・Surface Roughness 3.2Rz (1.0Ra) ・Running cost is reduced because of economical insert. ・Easy insert setting with the aid of a setting gauge. ・Employs safe, anti-centrifugal force construction for high-speed conditions. 0.25 250 Ceramic Ceramic Cutting Conditions vc=400m/min vc=600m/min p=0.5mm  z=0.15mm/ 0.20 200 Flank Wear width (mm) Number of Passes (Pass) Dry 0.15 vc=600m/min vc=1,000m/min 150 N 0.10 100 Technical Guidance / 0.05 50 Thermal cracks occur. References vc=1,500m/min Wet 0.0 0 300 450 600 750 900 1,050 1,200 1,350 1,500 0 20 40 60 80 100 120 140 160 180 200 Number of Passes (Pass) Cutting Speed (m/min) (Conditions) Dry cutting is recommended for high speed milling of cast iron with SUMIBORON. ・Work: FC250・Condition: ap =0.5mm fz =0.1mm/t Dry ・Tool material: BN7000 N28