Каталог Dormer Pramet фрезерование 2021 - 2022 - страница 780

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BRITTLE CRACKS AT THE CUTTING EDGE
↓(H) grain has a great influence.
(MT)CVD PVD+PVD coating recommended.
f↓Feed has infuence on intensity, but less than the cutting speed.
v↑↓It is about vibrations.
ap↓It has no influence.
↑Increase the rake angle to reduce cutting forces.
-No coolant (it is possible to use air to remove chips from cutting area).
Use better working condition (ae/DC).
FAILURE OF CUTTING EDGE
↓(H) grain has a great influence.
(MT)CVD PVD+PVD coating recommended.
f↑↓Good swarf control is very important.
v↑↓It is about swarf control and vibration.
ap↑↓Reduces the force load (important for machining with long overhangs).
↓Use less positive cutting geometry.
It has no influence.
Use better working conditions, reduce feed rate until insert is in cut.

CREATION OF RACK CRACKS

(H) grain has a great influence. (MT)CVD + + PVD coating recommended. PVD

f

Feed has infuence on intensity, but less than the cutting speed.

v

Lower speed means lower temperature. a p It has no influence. ↑ Use another (more positive) cutting geometry. - - - No coolant (it is possible to use air to remove chips from cutting area). Use better working condition (a /DC). e