Техническая информация Sumitomo - страница 12

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Technical Guidance Basics of Endmilling Endmilling Edition ■ Up-cut and Down-cut ● Side Milling ● Slotting fz fz fz Work material Up-cut Work material Work material Down-cut Work Feed Direction Work Feed Direction Work Feed Direction (a) Up-cut (b) Down-cut Work material Work material Work Feed Direction Work Feed Direction (a) Up-cut (b) Down-cut ● Wear Amount ● Surface Roughness ● Condition Work: S50C Feed Dir. Vertical Dir. Endmill: GSX21000C-2D Flank Wear Width (mm) 0.08 (ø10mm, 2 teeth) 0.07 5 Cutting Conditions: vc=88m/min 0.06 Up-cut 4 (N=2800min-1) 0.05 Rz (μm) Down-cut Down-cut vf=560mm/min 0.04 3 (fz=0.1mm/t) 0.03 Up-cut ap=15mm 0.02 Down-cut 2 Up-cut 0.01 ae=0.5mm 1 Side Milling 0 50 100 150 200 250 Dry,Air Cutting Length (m) 0 ■ Relation Between Cutting Side Milling Slotting Condition and Deflection Endmill Work: Pre-hardened steel Work: Pre-hardened steel (40HRC) (40HRC) Specifications Cutting Conditions: vc=25m/min Cutting Conditions: vc=25m/min ap=12mm ap=8mm ae=0.8mm ae=8mm Up-cut Down-cut Feed rate Feed rate Feed rate Feed rate Cat. Number Helix 0.16mm/rev 0.11mm/rev 0.05mm/rev 0.03mm/rev No. of Teeth Angle Style Style Style Style Up-cut Down-cut Up-cut Down-cut Up-cut Down-cut Up-cut Down-cut N GSX20800S-2D 2 30° Technical Guidance / References GSX40800S-2D 4 30° Cutting surface · The tool tip tends to back off with the down-cut. · The side of the slot tends to cut into the up-cut side toward the bottom of the slot. Reference surface Results · 4 teeth offers more rigidity and less backing off. · 4 teeth offers higher rigidity and less deflection. N20