Bearing ring machining steps
(1) cutting stage
Grindstone rough surface and the convex surface of the peak raceway contact, the contact area is small, flat area on the pressure, to a certain pressure, by the first piece of millstone "anti-cut" effect, the surface of the grindstone part of the abrasive loss and fragmentation, revealing some new sharp abrasive and blade edge. At the same time, the convex surface peaks are fast cutting, through cutting and anti-cutting action to remove the convex surface of the workpiece and the grinding of the peak metamorphic layer. This phase is called the cutting stage, at this stage removed most of the metal margin.
(2) Semi-cutting stage
As the process continued, the surface was gradually polished. At this time, terrazzo, and the surface contact area increases, the pressure per unit area decreases, reducing the cutting depth, cutting diminished capacity. At the same time, the surface of the pores are blocked millstone, grindstone cutting in half the state. This phase is called the half-cutting stage, in the semi-cutting stage cutting surface traces of shallow, and the emergence of dark sheen.
(3) finishing stage
This is a super finishing the final stage. As the surface was gradually polished, terrazzo surface contact area with further increases, and, between the grindstone and the workpiece surface lubricant film is gradually isolated, the pressure per unit area is small, not enough to wear Dan Zirui , reducing the cutting action, and finally tends to automatically stop the cutting. This phase is called the finishing stage. Finishing phase of the surface without cutting traces, there is a general gloss.