Bearings are the main components of various mechanical operations. In order to make bearings have better performance and quality in use, the super finishing technology used in the bearing processing process is used. The so-called precision machining process refers to various machining processes with machining accuracy and surface finish higher than the corresponding machining methods.
It is mainly divided into four stages.
The four stages of the bearing super finishing process:
(1) Strong cutting stage. When the rough peaks on the workpiece surface contact the surface of the oilstone, the contact stress is very large, causing the abrasive particles to break and sharpen themselves, and the cutting action is strong.
(2) Normal cutting stage. After a few seconds, the rough layer of the workpiece is removed, that is, the normal cutting stage begins. There is no black chip attached to the surface of the oilstone, but the cutting continues.
(3) Grinding transition stage. The self-sharpening of the abrasive particles decreases, the edge of the abrasive particles is flattened, the chip oxides begin to embed into the gaps of the oilstone, and the abrasive powder blocks the pores of the oilstone, so that the abrasive particles can only cut weakly, accompanied by extrusion and polishing. At this time, the surface roughness of the workpiece is quickly reduced, and black chip oxides are attached to the surface of the oilstone.
(4) Stop cutting and grinding stage. The friction between the oilstone and the workpiece is very smooth, the contact area is greatly increased, the pressure is reduced, and the abrasive particles can no longer penetrate the oil film and contact the workpiece. When the oil film pressure on the support surface is balanced with the oilstone pressure, the oilstone is floated. An oil film is formed during this period, and it no longer has a cutting effect. This stage is unique to super finishing.
