Bearing types are varied, in various mechanical equipment in the field of the application of the effect is not the same, different needs constitute a different bearing production conditions. In some aspects of the need to use more and better performance of the quality of bearings in the production and processing of the method used in the process of joining the ultra-precision machining process. The so-called precision machining process refers to the machining accuracy and surface finish higher than the corresponding machining method of various processing technology.

In the rolling bearing manufacturing process, super-fine is the last procedure of bearing ring processing, it is for reducing or eliminating the round deviation left over from grinding processing, repairing the shape error of the groove, refining its surface roughness, improving the surface physical and mechanical properties, reducing the vibration of the bearing, agitation, improving the mission of the bearing, has an important role.

Analyses the 4 stages of the bearing superfinishing process:
(1) strong cutting stage. Workpiece surface rough spikes and oil stone surface contact, contact stress is very large, so that the abrasive grains broken self-sharpening, cutting role is strong.
(2) Normal cutting stage. After a few seconds. Workpiece rough layer is ground, that is, into the normal cutting stage, the surface of the oil stone has no black chips attached, but the cutting still continues.

(3) Grinding transition stage. The abrasive grain from the sharpness is reduced, the abrasive grain edge edge is smoothed, the chip oxides began to embed the oil stone void, the abrasive grain powder blocking the oil stone pore, so that the abrasive grain can only be weak cutting, accompanied by extrusion and the role of the research and polishing, the roughness of the surface of the workpiece will soon be reduced, the surface of the oil stone has a black chip oxides adherence.

(4) Stop cutting and grinding stage. Oil stone and workpiece mutual friction has been very smooth, the contact area increases greatly, the pressure decreases, the abrasive particles have been unable to penetrate the oil film and workpiece contact, when the supporting surface of the oil film pressure and oil stone pressure balance, the oil stone is floating. Between the formation of oil film, which is no longer cutting. This stage is unique to ultra-fine machining.

Super-fine bearings can be reflected in the following three aspects
1, can effectively reduce the degree of corrugation.
In the superfine research process, in order to ensure that the oil stone always acts on the wave peak and not in contact with the wave valley, the oil stone and the workpiece contact arc ≥ the wavelength of the workpiece surface corrugation, in this way, the wave peak of the contact pressure is larger, the peak is excised, so as to reduce the degree of corrugation.
2、Improve the groove shape error of ball bearing raceway.
The super fine grinding can effectively improve the groove shape error of about 30% of the raceway.
3、It can make the surface of the super fine grinding produce compressive stress.
In the process of superfine research, the main cold plastic deformation, so that after superfine research, the surface of the workpiece to form residual compressive stress.
4、It can increase the contact area of the working surface of the collar.
After ultra-precision grinding, the contact support area of the working surface of the collar can be increased from 15% to 40% after grinding to 80% to 95%.