Both balls or rings, waviness produced in grinding, although Super finishing waviness can improve and reduce roughness, but the most fundamental measure is to reduce the ultra-fine grinding process in the waviness, to avoid random bump hurt, there are two main measures:

First, reduce the rolling surface of the vibration when the ultra-fine grinding, get a good shape accuracy and surface finish quality of the surface texture to reduce vibration, grinding machine must have a super good vibration resistance, bed and other important structural element with vibration absorption, ultra-precision machine tools Whetstone oscillation system with good anti-vibration performance; increase grinding speed, grinding 6202 foreign commonly used outside the raceway 60,000 spindle, grinding speed 60m / s or more, domestic general much lower, mainly due to the spindle and main bearing performance limitations. In the high-speed grinding, grinding force is small, thin grinding deterioration, is not easy to burn, but also can improve the machining accuracy and efficiency, low noise ball bearing on the great influence; spindle speed of movement and stiffness characteristics of ball bearings for low noise great influence on the grinding vibration, the higher the stiffness, the speed of the grinding force of grinding the less sensitive to changes in the grinding system vibration is smaller;

Second, improve the processing datum accuracy, ultra-grinding process to reduce the error in diameter and face re-mapping process is the grinding of super-positioning of the benchmark. Ultra-fine diameter of the channel re-mapping error is outside diameter of the groove grinding, groove grinding of ultra-ditch error recovery reflect indirect transfer. If the work piece in the transfer process produces bump hurt, will be directly mapped to the raceway processing complex on the surface, affecting the bearing vibration. Therefore, we must take the following measures: improve the positioning reference surface shape accuracy; processing pass smoothly, no bump injury; rough allowance form and position errors can not be too large, especially in the allowance is small, too large error will result in the final grinding and super finishing end to the final shape accuracy has not improved the quality requirements, seriously affecting the processing quality and consistency.



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