Каталог Sumitomo пластины с кубическим нитридом бора Sumiboron - страница 100

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 SUMIBORON I nsert for High Ef iciency Machining & Special Holders ■ Characteristics   ● Improved surface roughness in high-feed cutting.   ● Perfect for copying where good surface roughness is required. ● Effect of Different Nose Radii ● Comparison of Theoretical Surface Roughness Nose Radius (mm) Large Nose Radius Large Nose Radius f : Feed Rate Surface Roughness (μm) Same surface Good Surface Roughness roughness at approx. 2x efficiency Work Material Less than 1/3 of theoretical surface roughness Radius Small Nose Radius Theoretical f : Feed Rate Nose Feed Rate (mm/rev) Small Feed Rate Nose radius of 0.8mm compared to 2.4mm f=0.2mm/rev Theoretical surface roughness 1/3 or lower Work Material Required Theoretical Nose radius of 0.8mm compared to 2.4mm Surface Roughness Rz 8.0 μm Same surface roughness at approx. 2x efficiency * Actual value of surface roughness is approximately 1.5 to 3 times higher (for steel). * Theoretical surface roughness is calculated using the following formula: h = (f2/8r) × 103 ● Comparison of Machined Surface Finish by Different Nose Radii ● Comparison of Cutting Force by Different Nose Radii f L Surface Roughness Rz (μm) f Cutting force (Back Force) N 35% Increase With Wiper Insert Good Surface Roughness f f SUMIBORON Wiper Insert 10 to 15% Increase With Large Nose Inserts Wiper Wiper Inserts with a larger nose radius also give better surface roughness during actual machining. Lower cutting force than wiper inserts allows high-feed cutting. Work Material: SCM415H(60HRC) Work Material: SCM415H(60HRC) Cutting Conditions: vc=100m/min, ap=0.1mm, Dry Cutting Conditions: vc=150m/min, f=0.3mm/rev, ap=0.1mm, Dry L100