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Bearing ball hard grinding

Ball after ball machine with heat treatment for grinding wheel grinding method is called hard grinding, its role is to eliminate
Polishing (or light grinding) defect, remove the heat generated in the surface oxidation, decarburization, deformation and tootsie tissue defects,
Further improve the accuracy and surface quality.

Hard ball mill during or after the close visual inspection of surface defects, check after the cold acid burns, burns, general
Can be divided into secondary and secondary hardening tempering burns burns burns the second tempering after the cold acid were black,
Secondary hardening by cold acid burns after a middle gray marten site, surrounded by black titer.
Showing linear burn, punctuate burns and burns poles (large ball burns).

Linear burns reasons:

1 cast iron plate or wheel groove too deep, the impact ball rotation flexibility;

2 cast iron plate or wheel face is not parallel or groove depth is inconsistent, resulting in ball top ball friction phenomenon;

3 cast iron plate or the wheel does not correspond to the groove;

4 splitter with cast iron plate of the junction is not consistent;

5 iron plate at the entrance to trumpet too large, so that the ball touch wheel groove edge;

6 to adjust the slope of flow trough the ball properly, so that the ball too fast or too slow flow;

7 out of grain grinding wheel (block) block, so that out of the ball did not go well;

8 suction ball angle blade plate into a concave shape peace or wear, the ball did not go well together;

9 to exert undue pressure of work.




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