Page 274 - Drehen Komplettprogramm

Application information . Anwendungsinformation
General Turning /Allgemeine Drehbearbeitung, ISO Kennzeichnung
Turning · Drehen
No.
Tool wear type
Situation
Reason
Countermeasures
1+2
Flank wear
Poor surface quality and inconsistent measurement. Increase in cutting force.
Grade is too soft
Cutting speed is too high. Flank angle is too small. Feed rate is too low
Select grade with higher wear resistance
Reduce cutting speed Increase flank angle. Increase feed rate
3
Crater wear
Bad surface and chip control
Grade is too soft.
Cutting speed is too high. Feed rate is too high.
Select grade with higher wear resistance
Reduce cutting speed Reduce feed rate
4
Chipping
Tool life not stable Sudden breakage of cutting edge
Grade is too hard.
Feed rate is too high. Cutting edge strength not
strong enough
The rigidity of holder in
insuffiecient (vibration)
Select grade with higher toughness
Reduce feed rate
Change honing of cutting edge Use holder with bigger shank size
5
Fracturing
Cutting force increasing Surface roughness and measure becomes bad
Grade is too hard.
Feed rate is too high. Cutting edge strength not
strong enough
The rigidity of holder in
insufficient
Select grade with higher toughness Reduce feed rate
Change honing of cutting edge Use holder with bigger shank size
6
Plastic deformation
Inconsistent measure meet.
Damage to the cutting edge
Grade is too soft.
Cutting speed is too high. Depth of cut and feed rate too high
Cutting temperature is high
Grade with high wear resistance. Reduce cutting speed
Decrease depth of cut and feed rate. Grade with high thermal conductivity.
7
Welding
Poor surface quality and inconsistent measurement. Increase in cutting force.
Cutting speed is low. Cutting edge not sharp enough
Grade not suitable
Increase cutting speed Increase rake angle.
Select grade with lower affinity
8
Thermal Cracks
Break due to thermal variation effect often caused when cutting is interrupted.
Expansion or
shrinkage due to cutting heat Grade is too hard.
Use dry cutting
Select grade with higher toughness
9
Notch wear
Burr increase of
Cutting force information
Unstable cutting condition (uncut surface,chilled parts, machining hardened layer) Friction caused by jagged
shape chips.
Feed rate and cutting speed too high
Grade with high wear resistance. Increase rake angle to improve sharpness
Decrease cutting speed
10
Flaking
Mostly happens during machining of high hard materials or vibration
Cutting edge welding and adhesion.
Bad chip removing
Increase rake angle to improve sharpness
Use chip breaker with wider chip pocket
7
A
3
951
6
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A 274
General Turning
Allgemeine Drehbearbeitung