Bearing grinding process, its work surface is through the high speed rotating grinding wheel grinding, so in this not according to the work instructions operate and adjust the equipment, will be in bearing surface defects work there, so that affect the overall quality of the bearing. Bearing in precision grinding, due to rough demanding, work surface grinding traces can often appear to its macroscopic observation surface grinding trace basically has the following kinds.

 

Performance appear cross helical trace appear this kind of traces of grinding wheel are the main reasons why the bus flat  poor, bump phenomenon existing in grinding, grinding wheel with workpiece is only part of the contact, when the workpiece or several times after grinding wheel-forth movement, the performance can be recreated cross helical and the naked eye can be observed. These helical pitch and workpiece, the machine speed about size, and at the same time, and the grinding wheel axis line and table guide not parallel relevant.

 

(1) the main reason for the spiral form

 

1. The grinding wheel dressing bad, not chamfering edge horn, don't use the cooling fluid overhauled;

 

2. The workbench guide too much oil, the workbench floating;

 

3. Machine precision is bad;

 

4. Grinding pressure, etc.

 

(2) of the formation of the spiral line with reason

 

1. V guide rigid bad, when grinding wheel produce offset, just grinding wheel edges and working surface contact;

 

2. Trim noisy round table the reversing speed when unstable, the accuracy is not high, make the grinding wheel a slightly less edge trim;

 

3. Workpiece itself rigid poor;

 

4. A broken wheel is too high and grinding workpiece spalling of scrap iron deposition in the grinding wheel attached on the surface, this should trim good grinding wheel with cooling water flushing or scrub clean;

 
5. The grinding wheel dressing is bad, have local convex, etc.



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