What is the superficial processing of bearing

The superficial machining of the bearing is a feed motion to achieve the microbes finishing method.
The surface is usually precision rotation and grinding before the overtime processing. Specifically, under good lubrication and cooling conditions, the workpiece is applied to the workpiece by the fine abrasive tool (oil stone) and rotated in the vertical direction of the dry workpiece, the workpiece is quickly reciprocated at a certain speed of rotational speed. Exercise finishing method.
1. Bearing cutting
When the surface of the grinding surface is in contact with the acoustic peak of the rough raceway, since the contact area is small, the unit area has a greater force. Under certain pressures, the sharpening stone is first subjected to the "back" of the bearing workpiece, so some grinding of the surface of the sharpening stone falls off, exposes some new sharp grinds and edges. At the same time, the surface acoustic peak of the bearing workpiece is rapidly cut, and the projection of the surface of the bearing member and the ground deterioration layer surface is removed by cutting and reverse cutting. This stage is called the cutting stage, and most metal edges are removed at this stage.
2. Bearing half cut
As the processed continues, the surface of the bearing workpiece is gradually ground. At this time, the contact area of the grindstone and the surface of the workpiece increases, and the unit area is reduced, the cutting depth is reduced, and the cutting capacity is lowered. At the same time, the pores of the surface of the grinding stone are blocked and the sharpening is in a semi-cut state. This stage is called the semi-cutting phase of the bearing precision. In the semi-cut phase, the cut traces of the surface of the bearing works becomes lighter and the gloss is darker.
3. Smooth stage
This stage can be divided into two phases: one is the stage of the mill; the second is to stop the cutting stage after cutting.
4. Grinding phase
The abrasive particles are reduced by self-shared, and the edges of the abrasive particles are ground, and the oxides of the cutting chips begin to embed the grinding stone slit. The abrasive particles block the pores of the sharpening stone so that the abrasive particles can only perform weak cuts and are accompanied by extrusion and polishing. The roughness decreases rapidly, and the black oxide attached to the surface of the grinding stone.
5. Stop cutting and grinding stages
The friction between the oil and the workpiece is very smooth, the contact area is greatly increased, and the pressure drops. Abrasive particles can no longer penetrate the oil film contact workpiece. When the oil film pressure of the bearing surface is balanced with the oil stress, the oil is floated. In the process of forming the oil film, the cutting effect is no longer effective. This stage is a unique stage of superficial processing.