Общий каталог Mitsubishi 2020 - 2021 - страница 1750

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TOOL WEAR AND DAMAGE CAUSES AND COUNTERMEASURES Tool Damage Form Cause Countermeasure · Tool grade is too soft. · Tool grade with high wear resistance. · Cutting speed is too high. · Lower cutting speed. Flank Wear · Flank angle is too small. · Increase flank angle. · Feed rate is extremely low. · Increase feed rate. · Tool grade is too soft. · Tool grade with high wear resistance. · Cutting speed is too high. · Lower cutting speed. Crater Wear · Feed rate is too high. · Lower feed rate. · Tool grade is too hard. · Tool grade with high toughness. · Feed rate is too high. · Lower feed rate. Chipping · Lack of cutting edge strength. · Increase honing. (Round honing is to be changed to chamfer honing.) · Lack of shank or holder rigidity. · Use large shank size. · Tool grade is too hard. · Tool grade with high toughness. · Feed rate is too high. · Lower feed rate. Fracture · Lack of cutting edge strength. · Increase honing. (Round honing is to be changed to chamfer honing.) · Lack of shank or holder rigidity. · Use large shank size. · Tool grade is too soft. · Tool grade with high wear resistance. PlasticDeformation · Cutting speed is too high. · Lower cutting speed.· Depth of cut and feed rate are too large.· Decrease depth of cut and feed rate.· Cutting temperature is high.· Tool grade with high thermal conductivity. · Cutting speed is low. · Increase cutting speed. (For ANSI 1045, cutting speed 260 SFM.) Welding · Poor sharpness. · Increase rake angle. · Unsuitable grade. · Tool grade with low affinity. (Coated grade, cermet grade) · Expansion or shrinkage due to cutting · Dry cutting. heat. (For wet cutting, flood work material with Thermal Cracks cutting fluid) · Tool grade is too hard. · Tool grade with high toughness. *Especially in milling. · Hard surfaces such as uncut surface, · Tool grade with high wear resistance. chilled parts and machining hardened Notching layer. · Friction caused by jagged shaped chips. · Increase rake angle to improve (Caused by small vibration) sharpness. · Cutting edge welding and adhesion. · Increase rake angle to improve sharpness. · Poor chip disposal. · Enlarge chip pocket. Flaking P P035 TECHNICAL DATA