Bearing precision grinding surface grinding by Trace Analysis

Bearing in precision grinding, due to the rough demanding work surface grinding marks often appear to the naked eye can trace its surface grinding, mainly the following: First, the performance of cross spiral traces. This occurs mainly due to traces wheel bus straight poor, there is uneven phenomenon, in the grinding, the grinding wheel is only partial contact with the workpiece when the workpiece or the wheel back and forth several times after exercise, the performance will be reproduced in the workpiece cross helix, and can be observed visually. The pitch of the helix and the workpiece table speed, the size of workpiece speed, but also with the wheel axis is not parallel to the guide lines and the table.

(A) the roller bearing surfaces of the main spiral form

1 Dresser bad, not chamfered corners, unused coolant to be trimmed;

2 table guide rail lubricant too much, resulting workbench floating;

3 machine precision is not good;

4 grinding pressure is too big.

(B) with the formation of the bearing causes the helix

1.V shaped rail rigidity bad, when an offset grinding wheel, but wheel edge in contact with the work surface;

2 wheel dressing table when commutation speed is unstable, the accuracy is not high, so that one edge of the dressing wheel is slightly less;

3. Workpiece itself rigidity;

4 wheel has broken too flaking grit and the workpiece grinding wheel under the iron plot attached to the surface, this should be a good dressing wheel with cooling water wash or scrub clean;
5 wheel dressing well, there are local projections and so on.