Техническая информация Sumitomo - страница 4

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Technical Guidance Tool Failure and Remedies Turning Edition ■ Insert Failure and Countermeasures Type of Insert Failure Cause Countermeasures Flank Wear · Grade lacks wear resistance. · Select a more wear-resistant grade. P30 → P20 → P10 K20 → K10 → K01 · Use an insert with a larger rake angle. · Cutting speed is too fast. · Decrease the cutting speed · Feed rate is far too slow. · Increase feed rates. Crater Wear · Grade lacks crater wear resistance. · Select a more crater-wear-resistant grade. · Rake angle is too small. · Use an insert with a larger rake angle. · Change the chipbreaker. · Cutting speed is too fast. · Decrease the cutting speed · Feed rate and depth of cut are too · Reduce feed rates and depth of cut. large. Chipping · Grade lacks toughness. · Select a tougher grade. P10 → P20 → P30 · Cutting edge breaks off due to chip build-up. K01 → K10 → K20 · Cutting edge lacks toughness. · Increase amount of honing on cutting edge. · Reduce rake angle. · Feed rate and depth of cut are too · Reduce feed rates and depth of cut. large. Fracture · Grade lacks toughness. · Select a tougher grade. P10 → P20 → P30 K01 → K10 → K20 · Cutting edge lacks toughness. · Select a chipbreaker with a strong cutting edge. · Holder lacks toughness. · Select a holder with a larger approach angle. · Select a holder with a larger shank size. · Feed rate is too fast. · Reduce feed rates and depth of cut. · Depth of cut is too large. Welding or Built-up Edge · Inappropriate grade selection. · Select a grade with less affinity to the work material like coated carbide or cermet grades. · Dull cutting edge. · Select a grade with a smooth coating. · Use an insert with a larger rake angle. · Reduce amount of honing. · Cutting speed is too slow. · Increase cutting speeds. · Feed rate is too slow. · Increase feed rates. Plastic Deformation · Grade lacks thermal resistance. · Select a more crater-wear-resistant grade. · Use an insert with a larger rake angle. · Cutting speed is too fast. · Decrease the cutting speed · Feed rate is too fast. · Reduce feed rates and depth of cut. N · Depth of cut is too large. · Supply sufficient amount of coolant. · Not enough cutting fluid. Technical Guidance / References Notch Wear · Grade lacks wear resistance. · Select a wear-resistant grade. P30 → P20 → P10 K20 → K10 → K01 · Rake angle is too small. · Use an insert with a larger rake angle. · Cutting speed is too fast. · Alter depth of cut to shift the notch location. N12