Каталог Dormer Pramet фрезерование 2021 - 2022 - страница 778

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9 TYPES OF WEAR ON MILLING INSERTS BUILT–UP EDGE It has no influence. (MT)CVD + + Any coating (decisive factor is anti-adhesion effect). PVD f ↑ The higher the feed rate the less probability of built-up edge creation. v ↓↑ Change (generally increase) the cutting speed. ap It has no influence. ↓↑ Use more positive geometry (built up edge is not created when the rake angle is more than 40°). - Use a coolant with more effective anti-sticking properties (we do not recommend to use coolant for milling). FLANK WEAR Use a more wear resistant substrate (H). (MT)CVD + + Any coating (decisive factor is hardness – TiC, TiCN). PVD f ↑ Increase feed (especially if it is under 0.1 mm). v ↓ Decrease cutting speed. ap It has no influence. ↑ Increase the clearance angle. + It can help, but only with ideal working conditions. CRATERING ↑ Use a more wear resistant substrate (S). (MT)CVD + + CVD coating (decisive factor is oxidation resistance – a Al2O3). PVD f ↑ Feed has infuence on shape and position of crater. v ↓ Decrease cutting speed. ap ↓ Minimal effect. ↑ Use more positive cutting geometry. ++ It can help, but only with ideal working conditions. 777