1. Flank Wear? Higher cutting resistance,Notch wear on flank, Poor
roughness of surface, or deterioration of accuracy.Soft grades, Excessive cutting speed, Small flank angle, Low feed.
Select a higher, wear-resistant grade, Reduce cutting speed,
Increase flank angle, Increase feed.
2. Crater Wear? Uncontrolled chip,Poor surface quality,when
finishing High speed processing carbon steel
Soft grades, Excessive cutting speed, Excessive feed, The strength
of chip breaker Insufficiet.
Change to a higher wear-resistant grade, Reduce cutting speed,
Reduce feed, Select a higher strength chip breaker.
3. Chipping? Sudden fracture of cutting edge(rake face and flank),
Instability insert life
Toughness insufficient, Excessive feed rate, Strength of cutting
edge insufficient, Instability of the tool.
Select a tougher grade, Decrease feed rate, Increase honing of
cutting edge(chamfering to rounding), Increase the stability and
setting angle
4. Insert Fracture? Cutting resistance increased Poor surface
roughness.
Toughness insufficient, Excessive feed rate, Strength of cutting
edge insufficient, Instability of the tool.
Select a tougher grade, Decrease feed rate, Increase honing of
cutting edge(chamfering to rounding), Increase the stability and
setting angle.
5. Plastic Deformation? Variation of dimension Nose wear, cutting
edge drape or passivating.when processing alloy steel Poor surface
roughness
Soft grade, Excessive cutting speed, Excessive cutting depth and
feed rate, Overheat on cutting edge.
Select a higher red hardness cutting material, Decrease cutting
speed, Decrease cutting depth and feed rate, Select a higher
thermal conductivity cutting material(CVD+sufficient coolant).
6. Build-Up-Edge? Workpiece dissove with Cutting edge Poor surface
roughness when finishing, Cutting resistance increased, Cutting
soft materials.
Cutting speed too low, Cutting edge obtuse, Unsuitable tool
material. Increase cutting speed,Increase rake angle, Select small
sticking force.
