What are the sequence steps for bearing finishing?
Date:2022-07-16 Editor:Oukai Bearing

The superfinishing sequence of bearings can generally be divided into three steps: cutting, semi-cutting, and finishing.

One step: cutting of the bearing

When the surface of the grindstone is in contact with the convex peaks of the rough raceway surface, due to the small contact area, the force per unit area is large. Part of the abrasive grains on the surface of the grindstone fell off and chipped, revealing some new sharp abrasive grains and edges. At the same time, the convex peaks on the surface of the bearing workpiece are subjected to rapid cutting, and the convex peaks and the grinding deterioration layer on the surface of the bearing workpiece are removed by the action of cutting and reverse cutting. This stage is called the cutting stage, where most of the metal allowance is removed.

The second step: half cutting of the bearing

As machining continues, the surface of the bearing workpiece is gradually ground flat. At this time, the contact area between the grindstone and the surface of the workpiece increases, the pressure per unit area decreases, the cutting depth decreases, and the cutting ability is weakened. At the same time, the pores on the surface of the grindstone are blocked, and the grindstone is in a semi-cutting state. This stage is called the half-cutting stage of bearing finishing. In the half-cutting stage, the cutting marks on the surface of the bearing workpiece become lighter, and a darker luster appears.

The third step: smoothing stage

This is the last step in the superfinishing of the bearing. As the workpiece surface is gradually ground, the contact area between the grinding stone and the workpiece surface further increases, and the grinding stone and the bearing workpiece surface are gradually isolated by the lubricating oil film, the pressure per unit area is very small, the cutting action is reduced, and finally the automatic Stop cutting. We call this stage the smoothing stage. In the finishing stage, there is no cutting marks on the surface of the workpiece, and the bearing presents a bright finished luster.

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