bearing

What is bearing super precision? Bearing superfinishing process is a kind of feed movement to achieve a micro-grinding of a finishing processing method.

The surface before super finishing is generally precision turning and grinding. Specifically, it refers to a finishing processing method in which a fine-grained abrasive tool (oil stone) exerts a small pressure on the workpiece under good lubrication and cooling conditions, and makes a fast and short reciprocating oscillation movement on the workpiece rotating at a certain speed in the vertical direction of dry workpiece rotation.

What is the role of bearing superfinishing? In the process of rolling bearing manufacturing, superfinishing is the final process of bearing ring processing, which plays an important role in reducing or eliminating the circular deviation left by grinding processing, repairing the shape error of the channel, refining its surface roughness, improving the surface physical and mechanical properties, reducing the vibration and noise of the bearing, and improving the mission of the bearing.

It can be reflected in the following three aspects

1.can effectively reduce the ripple degree. In the process of super finishing, in order to ensure that the oil stone always acts on the crest of the wave without contacting the trough, the arc of the contact between the oil stone and the workpiece is greater than the wavelength of the surface waviness of the workpiece, so that the contact pressure of the crest is large, and the convex peak is cut out, thereby reducing the waviness.

2.improve the groove error of ball bearing raceway. Super finishing can effectively improve the groove error of raceway by about 30%.

3.It can produce compressive stress on the surface of superlating. In the process of superlating, cold plastic deformation is mainly produced, so that residual compressive stress is formed on the surface of the workpiece after superlating.

4.The contact area of the working surface of the ring can be increased. After super finishing, the contact support area of the ring working surface can be increased from 15% to 40% after grinding to 80% to 95%.