Fine Boring Tool
Fine Boring Head/ Finish Boring Head
A rough boring head is used before finish boring tool to open up a hole and prepare all the issues before the finish boring head can be used. Our rough and finish boring drills are not same as boring bars with indexable inserts used on VMC and CNC machines; mainly our finish boring head is used on deep hole drilling machines to be connected to the machine with a deep hole drilling tube.
The floating fine boring head is widely used in international market; all sizes and specification are available to meet customer's request.
Characteristic
● Good surface finish at about Ra=1.25-1.6
● Diameter can be adjusted by the cartridge by 0.5mm
● Finish boring process is smooth with high tolerance
● Adjustable boring head can save cost and improve efficiency
Trouble Shooting
Line # | Issues | Reason | Solution |
1 | Too short chips | Incorrect cutting parameter | Adjust Speed and Feed |
Incorrect chip breaker, fillet angle too small or too deep | Change chip breaker | ||
Unstable component material | Adjust to appropriate Speed and Feed | ||
Inappropriate initial cutting (component is not centered) | Adjust component with central height | ||
2 | Too long chips | Incorrect cutting parameter | Adjust Speed and Feed |
Incorrect chip breaker, fillet angle too small or too shallow | Change chip breaker | ||
3 | Unstable chips | Unstable component material | Adjust to appropriate Speed and Feed |
Incorrect feeding device (for example use hydrolinder as feeding device) | Consult equipment supplier or sales engineer | ||
Not enough coolant resulting in chip congestion | Increase coolant | ||
Component and tools are not rigid resulting in vibration | Consult equipment supplier or sales engineer | ||
4 | fibrous chips | Unstable component material | Ajust to appropriate Speed and Feed |
Incorrect feeding device (for example use hydrolinder as feeding device) | Consult equipment supplier or sales engineer | ||
Contaminated coolant | Clean the coolant | ||
Chemical reaction between component and carbide cutting tools | Check and change cutting tools grade | ||
Cutting edge chips off | Change the drill | ||
Low feed | Increase the feed | ||
5 | Carbide cutting edge Chip off | Cutting tools are not sharp enough | Resharp and grind the cutting edge |
Not enough coolant | Check flow and pressure | ||
Contaminated coolant | Clean the coolant | ||
Small guide bushing tolerance | Change smaller dia drill if necessary | ||
Eccentricity between shank and spindle | Adjust eccentricity | ||
Incorrect cutting edge parameter | Change cutting edge parameter | ||
Unstable component material | Ajust to appropriate Speed and Feed | ||
6 | Short cutting life | Inappropriate feed or speed | Adjust feed and speed |
Inappropriate carbide grade or coating | Change grade according to materials | ||
Not enough coolant | Check coolant temperature and coolant system | ||
Incorrect coolant | Change if necessary | ||
Eccentricity between shank and spindle | Adjust eccentricity | ||
Incorrect cutting edge parameter | Change cutting edge parameter | ||
Unstable component material | Ajust to appropriate Speed and Feed | ||
7 | Rough surface | Eccentricity | Check and adjust |
Chip breaker too big or lower than central height | Check correct chip breaker | ||
Incorrect cutting tool or guide bar dimensions | Select correct cutting tools | ||
Eccentricity between component and drills | Adjust eccentricity | ||
Vibration | Consult equipment supplier or cutting tools engineer | ||
Incorrect cutting edge parameter | Change cutting edge parameter | ||
Low cutting speed | Provide cutting speed | ||
Low feed while cutting carbide material | Increase feed | ||
Unstable feed | Improve feed | ||
8 | Eccentricity | Deviation between machine and component | Adjust |
Too long drill rod or poor straightness | Adjust | ||
Wear on inserts and guide pad | Change cutting tools or parts | ||
Component material (features, hardness, impurity) | Select correct cutting tools and cutting parameter | ||
9 | Spiral holes | Chip off on peripheric inserts clamp | Change |
Wear on guide pad resulting in less support | Change and adjust | ||
Deviation between machine and component | Adjust | ||
Less coolant and lubrication | Adjust coolant | ||
10 | Too much cutting vibration | Cutting tools are not sharp enough | Select correct cutting tools |
Incorrect cutting parameter | Adjust cutting parameter | ||
Machine is not rigid with less feed | Adjust machine or decrease drill diameter |
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