Technical Training And Troubleshooting
发布时间：
2018-11-23 16:54
来源：
Thinning grinding wheel
1.Please carefully read the Safety Precautions for Diamond and CBN Grinding Wheels before the thinning grinding wheel is installed;
2.Setting rules for grinding wheel dressing amount after the thinning grinding wheel is installed
2.1The dressing amount of thinning grinding wheel LN-297D is generally set to 2000um;
2.2The dressing amount of thinning grinding wheel LS-304D is generally set to 300um;
2.3The dressing amount of thinning grinding wheel LG-255D is generally set to 500um;
3.Parameter setting reference table of grinding wheel using
3.1Routine parameter setting of NTS machine
|
Machine Manufacturer |
Number Of Working Segments |
Advance Speed(um/s) |
Dressing Setting |
Grinding Wheel Speed |
RPM Of Work Disk |
Rotating Direction |
|
NTS |
3 segments |
1.0/0.6/0.4 |
P+S/P+S/S |
600RPM |
100RPM |
CCW/CW |
3.2Routine parameter setting of SPEEDFAM machine
|
Machine Manufacturer |
Number Of Working Segments |
Advance Speed(mm/min) |
Grinding Wheel Speed |
Working Speed |
Fine Grinding Amount Setting |
|
SPEEDFAM |
2 segments |
0.05/0.03 |
1000RPM |
60RPM |
0.04mm |
3.3 Routine parameter setting of GALAXY machine
|
Machine Manufacturer |
Number Of Working Segments |
Advance Speed(um/s) |
Grinding Wheel Speed |
Working Speed |
Grinding Abnormal Value Setting |
|
GALAXY |
3 segments |
1.0/0.06/0.03 |
1100RPM |
80RPM |
35um |
4.Analysis of quality abnormality
|
Abnormal Condition |
Possible Cause |
Solution Measures |
|
Edge Darkness And Fragmentation Rate Exceed Standards |
Target achievement value and propulsive parameters are not suitable; |
Set the appropriate advance speed and target achievement value |
|
High cooling water temperature |
Control cooling water temperature at 18-22 ℃ |
|
|
Small cooling water flow |
Check the cooling water channel is smooth or replace the filter element in time |
|
|
The edges of the grinding teeth are damaged or have coarse particles |
Repair processing or replace grinding wheel |
|
|
Wax is dirty or the residual crystal is not cleaned up |
Control the dirt of the wax or chamfer the chip before waxing |
|
|
Individual grinding wheels with high edge or poor chip removal |
Grinding wheel dressing or clean the machine in time |
|
|
Improper grinding wheel formula |
Adjust the grinding wheel formula |
|
|
High Load |
Improper tilt angle of the grinding wheel of the machine |
Adjust the tilt angle of the grinding wheel |
|
Grinding wheel shaft power of machine is small/ |
Choose the right processing parameters and tools. |
|
|
Grinding wheel formula is too strong or structure is inappropriate |
Adjust the grinding wheel formula and structure. |
|
|
Grinding wheel has a passivation trend. |
Grinding wheel dressing |
|
|
Increase the advance speed |
Adjust the appropriate load warning value |
|
|
Big TTV |
Improper tilt angle of the grinding wheel of the machine |
Adjust the tilt angle of the grinding wheel |
|
The advance speed is fast. |
Adjust the advance speed to appropriate degree. |
|
|
Grinding wheel shaft has clearance. |
Maintain the machine. |
|
|
The wear resistance of the grinding wheel is too strong. |
Reduce the wear resistance of the grinding wheel. |
|
|
Target Attainment Alarm |
Each target setting and advance speed do not match. |
Set appropriate processing parameters and dressing parameters. |
|
Large grinding wheel loss |
Increase the correction value |
|
|
Alarm setting is set too low. |
Optimize and set reasonable alarm values |
|
|
Ceramic tray thickness deviation |
Replace the appropriate ceramic tray. |
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