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Drilling Inserts Wear Problems and Solutions
SOLID CARBIDE
DRILLING - INDEXABLE HEAD
DRILLING - INDEXABLE INSERTS
Type of Wear
×
Flank Wear
Flank Wear
Cause
High cutting speed
Low wear resistance carbide grade
Remedy
Check that the correct geometry is used
Increase coolant pressure
Change to harder grade
Increase oil concentration percentage
Reduce cutting speed.*** increase feed
×
Crater Wear
Crater Wear
Cause
Excessive cutting temperatures and pressures on the top of the insert
Remedy
Reduce cutting feed
Check that the correct geometry is used
×
Plastic Deformation
Plastic Deformation
Cause
Cutting temperature is too high
Remedy
Check cutting parameters
Reduce cutting feed
Increase coolant pressure/volume
Use harder grade
Check that the correct geometry is used
×
Thermal Cracking
Thermal Cracking
Cause
Excessive variations in surface temperature, intermittent machining, or variations in coolant supply
Remedy
Increase coolant pressure/volume
Increase oll concentration percentage
×
Corner Fracture
Corner Fracture
Cause
Caused by excessive insert wear before indexing the insert
The grade and geometry could be too weak for the applications
Excessive load on the insert
Built-up edge has been formed on the insert
Remedy
Check radial runout
Reduce feed rate increase the speed
Check tool and part clamping rigidity
Check if pocket gripping force is too low, replace the holder
Increase coolant pressure
Improve jet direction in case of external coolant supply
×
Built-up Edge
Built-up Edge
Cause
Cutting zone temperature is too low
Negative cutting geometry
Machining of very sticky materials such as low-carbon steel, stainless steels, and aluminum
Remedy
Increase the feed
Increase cutting speed
Increase coolant pressure
Check oil percentage in the coolant fluid
×
Edge Chipping
Edge Chipping
Cause
Low wear resistance carbide grade
Built-up edge has been formed
Insufficient cutting fluid
Remedy
Reduce feed rate
Increase cutting speed
Increase coolant pressure
Improve jet direction in case of external coolant supply
Change to different geometry
Check tool and part clamping rigidity
×
Chisel Chipping
Chisel Chipping
Cause
Chisel runout is too big
Combine high feed & low speed
Remedy
Reduce feed rate and increase the cutting speed
Check that chisel misalignment does not exceed 0.02mm
Check tool and part clamping rigidity
Check if pocket gripping force is too low, replace the holder
×
Corner Chipping
Corner Chipping
Cause
Radial runout is too big
Insufficient cutting fluid
Remedy
Check radial runout
Reduce feed rate increase the speed
Check tool and part clamping rigidity
Check if pocket gripping force is too low, replace the holder
Increase coolant pressure
Improve jet direction in case of external coolant supply
×
Land Wear
Land Wear
Cause
Cutting speed too high
Low wear resistance carbide grade
Radial runout is too big
Remedy
Check that the correct geometry is used
Check that T.I.R runout does not exceed 0.02mm
Reduce cutting speed
Increase coolant pressure
Improve jet direction in case of external coolant supply
Check and improve tool and part clamping rigidity
Check if pocket gripping force is too low, replace the tool body
×
Flank Wear
Flank Wear
Cause
High cutting speed
Low wear resistance carbide grade
Remedy
Check that the correct geometry is used
Increase coolant pressure
Change to harder grade
Increase oil concentration percentage
Reduce cutting speed.*** increase feed
×
Crater Wear
Crater Wear
Cause
Excessive cutting temperatures and pressures on the top of the insert.
Remedy
Reduce cutting feed
Check that the correct geometry is used
×
Plastic Deformation
Plastic Deformation
Cause
Cutting temperature is too high
Remedy
Check cutting parameters
Reduce cutting feed
Increase coolant pressure/volume
Use harder grade
Check that the correct geometry is used
×
Thermal Cracking
Thermal Cracking
Cause
Excessive variations in surface temperature, intermittent machining, or variations in coolant supply
Remedy
Increase coolant pressure/volume
Increase oll concentration percentage
×
Corner Fracture
Corner Fracture
Cause
Caused by excessive insert wear before indexing the insert
The grade and geometry could be too weak for the applications
Excessive load on the insert
Built-up edge has been formed on the insert
Remedy
Check radial runout
Reduce feed rate increase the speed
Check tool and part clamping rigidity
Check if pocket gripping force is too low, replace the holder
Increase coolant pressure
Improve jet direction in case of external coolant supply
×
Built-up Edge
Built-up Edge
Cause
Cutting zone temperature is too low
Negative cutting geometry
Machining of very sticky materials such as low-carbon steel, stainless steels, and aluminum
Remedy
Increase the feed
Increase cutting speed
Increase coolant pressure
Check oil percentage in the coolant fluid
×
Edge chipping
Edge chipping
Cause
Low wear resistance carbide grade
Built-up edge has been formed
Insufficient cutting fluid
Remedy
Reduce feed rate
Increase the speed
Increase coolant pressure
Improve jet direction in case of external coolant supply
Change to different geometry
Check tool and part clamping rigidity
×
Chisel Chipping
Chisel Chipping
Cause
Chisel runout is too big
Combine high feed & low speed
Remedy
Reduce feed rate and increase the cutting speed
Check that chisel misalignment does not exceed 0.02mm
Check tool and part clamping rigidity
Check if pocket gripping force is too low, replace the holder
×
Land Wear
Land Wear
Cause
Cutting speed too high
Low wear resistance carbide grade
Radial runout is too big
Remedy
Check that the correct geometry is used
Check that T.I.R runout does not exceed 0.02mm
Reduce cutting speed
Increase coolant pressure
Improve jet direction in case of external coolant supply
Check and improve tool and part clamping rigidity
Check if pocket gripping force is too low, replace the tool body
×
Corner Chipping
Corner Chipping
Cause
Radial runout is too big
Insufficient cutting fluid
Remedy
Check radial runout
Reduce feed rate increase the speed
Check tool and part clamping rigidity
Check if pocket gripping force is too low, replace the holder
Increase coolant pressure
Improve jet direction in case of external coolant supply
×
Flank Wear
Flank Wear
Cause
High cutting speed
Low wear resistance carbide grade
Remedy
Reduce cutting speed
Increase coolant pressure/volume
Choose better wear resistance grade
Increase oil concentration percentage
×
Crater Wear
Crater Wear
Cause
Excessive cutting temperatures and pressures on the top of the insert
Remedy
outer insert:
Reduce cutting speed
Choose better wear resistance grade
Change to different chipbreaker
inner insert:
Reduce feed rate
Change to different chipbreaker
×
Plastic Deformation
Plastic Deformation
Cause
Cutting temperature is too high
Remedy
Reduce feed rate
Choose better wear resistance grade
Increase coolant pressure/volume
Choose a different chipbreaker
×
Thermal Cracking
Thermal Cracking
Cause
Excessive variations in surface temperature, intermittent machining, or variations in coolant supply
Remedy
Use tougher grade
Increase coolant pressure/volume
×
Edge Fracture
Edge Fracture
Cause
Caused by excessive insert wear before indexing the insert
The grade and geometry could be too weak for the applications
Excessive load on the insert
Built-up edge has been formed on the insert
Remedy
Use tougher grade
Reduce feed rate
Increase coolant pressure/volume
Change to different chipbreaker
×
Built-up Edge
Built-up Edge
Cause
Cutting zone temperature is too low
Negative cutting geometry
Machining of very sticky materials such as low-carbon steel, stainless steels, and aluminum
Remedy
Increase cutting speed
Change to different chipbreaker
Reduce feed rate
Increase coolant pressure/volume
×
Chipping
Chipping
Cause
Low wear resistance carbide grade
Built-up edge has been formed
Insufficient cutting fluid
Remedy
Choose tougher grade
Reduce feed
Increase coolant pressure/volume
Change to different chipbreaker
×
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