COMMON DEFECTS (FAULTS) IN GRINDING AND THEIR REMEDIES
Fault
|
Symptom
|
Caused by
|
Remedies
|
Chtter marks
|
Intermittent sparking Uneven sound.
|
Wheel out of balance
|
Re-balance the wheel
|
Glazing of wheel
|
Incorrect grade of wheel
|
Change the wheel
| |
Work piece (or) work holding device loose.
|
Secure both properly.
| ||
Wheel in correctly dressed.
|
Re-dress the wheel
| ||
Loose pulley on spindle.
|
Tighten the pulley.
| ||
Uneven cutting and irregular sparking.
|
Feed too coarse.
|
Decrease the feed rate.
| |
Machine vibration
|
Improper bedding down.
|
Report to your supervisor.
| |
Scratched surface
|
Incorrect grain size of wheel.
|
Change to correct grain size
| |
Dirty coolant.
|
Clean the tank and replace.
| ||
Poor Surface finish.
|
Surface burnished.
|
Incorrect wheel grade
|
Fit a correct wheel
|
Feed too coarse.
|
Reduce the feed.
| ||
Cut too deep.
|
Decrease the depth of cut.
| ||
Insufficient coolant.
|
Increase the supply of the coolant.
| ||
Ridges
|
Wheel damaged/not Properly dressed.
|
Change the wheel if necessary or dress the wheel
| |
Wheel wearing out
|
Wheel size reduced
|
Wheel is too soft
|
Use harder wheel.
|
Grinding wheel speed lower than that recommended.
|
Increase the wheel speed to the recommended speed
| ||
Wrong rate of traverse or work speed.
|
Reduce the rate of traverse and work speed and. decrease slightly the depth of cut
|
COMMENTS