FAG bearings in the grinding process, its surface is carried out through the use of high-speed rotating wheel grinding, grinding if you do not follow the operating instructions and adjust equipment, work surface flaws you FAG bearings, thus affecting the overall quality of FAG bearings. FAG bearing in precision grinding time, due to the very high rough, appears on the surface of the grinding marks often can be seen with the naked eye to their surface grinding marks mainly has following several.
Such traces occur mainly as a result of poor wheel bus is straight, concave, grinding, grinding wheel contact with the workpiece is only partially, when after the workpiece or wheel a few times back and forth movement, performance in workpieces will reproduce the cross-spiral and observable to the naked eye. These spiral pitch speed, speed relative to the size of the workpiece and workpieces, as well as parallel to the wheel axis Guide and worktable is not related.
Was due primarily to reproduce the napping traces on the surface after the abrasive peeling with coarse-grained, caused by the wear particles caught between workpiece and wheel.
Surface of workpiece in grinding was napping when the specific cause is:
1. the traces left behind when coarse grinding, fine grinding is not worn away;
2. coarse abrasive with tiny wear particles in coolant filter is not clean;
3. coarse-grain wheel just when the trimming size is easy to fall off;
4. validity of toughness or wheel is too soft;
5. toughness of abrasive and workpiece material toughness mismatch.
FAG bearing parts of the standards and requirements of surface roughness, but grinding and Superfinishing process, for various reasons, often falls short of the requirements set out in. Does not meet the requirements of workpiece surface roughness caused mainly due to:
1. grinding speed is too low, feed speed too fast, feeding quantity is too large, no feed grinding time is too short;
2. workpiece speed too high or the workpiece and wheel axes vibration is too large;
3. wheel size is too rough or too soft;
4. dressing too fast or trimming body clearance is too large;
5. Wheel dressing diamond is not sharp or poor quality;
6. the Superfinishing stone with oil quality is not good, the installation location is not correct;
7. hyper-refined kerosene quality does not meet the requirements;
8. finish time is too short and so on;



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