Reasons and countermeasures of Nmb bearing surface grinding defects

Nmb bearing surface grinding defects reasons and countermeasures of Nmb bearing in the process of grinding, the surface is working on the high-speed rotation of the grinding wheel grinding, therefore when grinding if not operated according to the working instruction and adjust equipment, will work in the bearing surface flaws, that affect the overall quality of the bearing. Bearing in the precision grinding, due to high demand for rough, the work surface grinding traces can often use the naked eye to observe its surface grinding marks mainly has the following kinds: performance of cross helical traces in the cause of the trace is mainly due to the grinding wheel of busbar poor laymen, bump phenomenon, when grinding, grinding wheel and workpiece is only part of the contact, when the workpiece or after grinding wheel movement back and forth several times, in the workpiece will reappear cross helix and the naked eye can be observed. These spiral pitch and the size of the workpiece speed, workpiece speed, but also associated with grinding wheel axis and workbench guide rail is not parallel. （ A) Spiral form one of the main causes of bad, grinding wheel dressing, edge chamfer, coolant not used for finishing; 2, workbench guide guide lubricating oil too much, cause a floating table; 3, machine tool precision is not good; 4, grinding pressure, etc. （ 2) Helix formation has the reason 1, vee way bad rigidity, when grinding wheel to produce deviation, only edge grinding wheel surface contact with work; 2, finishing noisy round table when the reversing speed is not stable, accuracy is not high, a edge dressing grinding wheel is made slightly less; 3, poor rigidity workpiece itself; 4, have broken too peeling sand grinding wheel and workpiece under the grinding of iron product attached to the grinding wheel surface, therefore should be dressed wheel with cooling water flushing or scrub clean; 5, grinding wheel dressing is bad, such as local protuberance.