|
Problem
|
Possible
Causes
|
Suggested
Correction
|
|
1.Workpiece not flat or
parallel
|
| Depth of cut too high
|
| Burning of workpiece
|
| Stress relieving from
workpiece
|
| Dirty magnetic chuck
|
| Wheel & spindle are
not aligned
|
|
| Reduce depth of cut,
especially In final grinding
|
| Select finer grit size
or harder grade of segments or dress the grinding surface rougher
|
| Relieve stress before
final grinding
|
| Clean chuck before
final grinding
|
|
|
2. Scratches on
worklpiece
|
| Dirty coolant
|
| Segment is too soft
|
| Grit size is too coarse
|
| Incorrect dressing
|
|
| Clean coolant tank or
replace coolant
|
| Select harder grade of
segments
|
| Select finer grit size
|
| Dress segments smoother
|
|
|
3. Chatter marks on
workpiece
|
| Worn spindle bearings
|
| Segments are poorly
clamped
|
| Glazed grinding surface
|
| Segment too hard
|
|
| Check spindle bearings
and replace
|
| Check segments mounting
|
| Dress segments rougher
|
| Select softer grade of
segments
|
|
|
4. Burning of workpiece
|
| Segment too hard
|
| Table speed too low
|
| Contact
area too large
|
| Segments dressed too
smooth
|
| Depth of cut too much
|
| Insufficient coolant
|
| Insufficient power
|
|
| Select softer grade of
segments
|
| Increase table speed
|
| Select softer grade or
finer grit of segments
|
| Reduce
contact area by rearrange workpieces Reduce grinding surface
of segments
|
| Dress segments rougher
|
| Reduce
depth of cut or dress segments frequently
|
| Increase coolant flow
and direct it onto contact area
|
| Increase machine power
|
|
|
5. Segments glazing
|
| Grit size too fine
|
| Segments dressed too
smooth
|
| Stock removal rate too
small
|
| Poor coolant quality
|
|
| Select coarser grit
size
|
| Dress segments rougher
|
| Increase depth of cut
or table speed
|
| Use detergent type of
coolant
|
|
Segments
are used for surface grinding and achieve:
