When it comes to the surface integrity of the precision bearing steel ball, it is actually an important technical indicator that we usually describe three aspects of the surface defect degree, surface roughness, uniformity of distribution, and surface hardness uniformity of a precision bearing steel ball. One of the main factors that affect the dynamic properties of steel balls.
The surface quality defect of precision bearing steel ball refers to the very fine material defect on the surface caused by the accuracy of the equipment, the quality of the raw material, and the adjustment of the tooling during the processing of the steel ball. According to their different forms, they can be divided into four categories: points, group points, strokes, and scratches. The point is the point defect on the surface of the precision bearing steel ball; the group point refers to a number of point-like defects that closely gather on the surface of the steel ball; the stroke refers to the random distribution of long and short thin lines on the surface of the steel ball. Defects; scratches refer to a group of short, straight, linear defects in the same direction on the surface of the steel ball.
Research shows that under the current processing conditions, the surface quality defects of precision bearing steel balls are unavoidable, but their severity is not the same. For example, for a precision bearing steel ball with a severe degree of surface imperfections, the single-element vibration value is 3 dB higher than that of a steel ball with no imperfections; The vibration value is about 2 dB higher than that of a steel ball with no surface scratches. On the other hand, the steel ball with heavy surface scratches has a single-vibration value that is about 4 dB higher than the ball without scratch.
The bearing with the three kinds of heavier surface defects of the precision bearing steel ball bearing separately, their vibration noise is much higher than the bearing of the control group (bearing assembled with the steel ball that basically does not have these three surface defects) A few sub-defects, higher than 3.9 dB; with scratch defects, higher than 4.7 dB; with defects, 2.5 dB higher.
It is also through the above analysis, we basically understand how to improve the dynamic performance of the precision bearing steel ball from the process, in order to expect to eventually solve the problem of vibration and noise of the bearing after the sleeve, so that it can also be To ensure the quality of precision bearing steel balls.