Superfinishing is a traditional machining process of grinding by high-frequency small oscillation of oil stone, to improve the surface quality of the workpiece as the note purpose, in the bearing, automotive, hydraulic pneumatic and many other industries have a wide range of applications, especially in the bearing industry, is now the main final machining process of the internal working surface of the bearing. What is bearing superfinishing? Bearing superfinishing, also known as superfinishing grinding, is a micro-grinding process. For high precision bearings, the rolling surface of the collar and the working surface of the rolling element are usually subject to superfinishing. There are different processing equipment and different processing principles for superfinishing. In order to achieve the geometric accuracy requirements and surface quality requirements, comprehensive consideration of equipment, tooling, oil stones, grinding fluid, and even the state of the bearing parts up to the grinding process is required. What is the role of bearing superfinishing? In the rolling bearing manufacturing process, superfinishing is the end process of bearing collar processing, which has an important role in reducing or eliminating the circular deviation left by grinding process, repairing the shape error of the groove, refining its surface roughness, improving the physical and mechanical properties of the surface, reducing the vibration and noise of the bearing, and improving the life of the bearing, specifically as follows 1, can effectively reduce the ripple degree. In the super-finishing research process, in order to be able to ensure that the oil stone always acts on the crest and not contact with the trough, the oil stone and the workpiece contact arc ≥ the wavelength of the workpiece surface corrugation, so that the contact pressure of the crest is larger, the convex crest is removed, thus reducing the corrugation. 2、Improve the groove shape error of ball bearing raceway. Super finishing research can effectively improve the groove shape error of the raceway by about 30%. 3, can make the super-finishing research surface to produce compressive stress. Super finishing research process, the main produce cold plastic deformation, so that after super finishing research, the workpiece surface residual compressive stress. 4、It can make the contact area of the working surface of the collar increase. After superfinishing research, the contact support area of the working surface of the collar can be increased from 15% to 40% after grinding to 80%-95%.

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