The influence of bearing ring raceway superfinishing on the working performance of rolling bearings

Q : The impact of superfinishing of bearing ring raceways on the working performance of rolling bearings.

A : After the ring rolling surface is superfinished, the working performance of the bearing is improved in the following aspects:

1. Improve the rotation accuracy of the bearing and reduce the vibration and noise of the bearing. Experimental studies have confirmed that the improvement of bearing rotation accuracy and the reduction of vibration and noise are closely related to the significant reduction of the circular deviation of the ring.

2. Improve the bearing capacity. Since the actual bearing surface of the ring rolling surface is greatly increased after superfinishing, this creates good conditions for improving the load-bearing capacity of the entire bearing. In addition, super-finishing the convexity of the rolling bearing raceway can also improve the bearing's load-bearing capacity.

3. Improve the lubrication effect of bearings and reduce wear. Because a uniform and fine cross-reticular pattern is formed on the rolling surface after superfinishing, this cross-reticular pattern is very beneficial to lubrication. The surface is easy to store lubricating oil, and an oil film can be maintained between the surfaces of the rings and rolling elements when the bearing is working, thus avoiding or reducing wear.

4. Reduce the heat generated when the bearing is working. This is a reflection of the comprehensive effect of superfinishing.

In short, superfinishing greatly improves the working performance and service life of the bearing.

Because superfinishing has so many functions and effects, it is increasingly favored by the finishing of bearing rings. The superfinishing technology and equipment in my country's bearing industry have developed rapidly. Most bearing manufacturers have achieved superfinishing in the finishing of rings; there are various forms and specifications of special superfinishing machine tools; many factories also manufacture oilstones and prepare lubricating coolants. The continuous development of superfinishing technology, especially the superfinishing technology and equipment of ball bearing grooves, has developed faster. Some factories have also introduced new technologies and high-precision automatic superfinishing machine tools to produce a large number of low-noise bearings and silent bearings.