Superfinishing can generally be divided into three stages: the cutting stage, half cutting stage, finishing the stage.
(1) the cutting phase
Raceway surface roughness of grinding stone surface and convex Feng contact, due to the smaller contact area and pressure on a unit area, under a certain pressure, rubbing first workpiece "against cutting" effect, making part of the abrasive grinding stone surface shedding and broken, revealing some new sharp grits and blade edge. Meanwhile, the convex surface peak of fast cutting, through cutting and anti-cutting role dropped on the surface of the workpiece and grinding convex peak metamorphic layers. This phase is called phase cutting, cut off at this stage most of the metal margin.
(2) half-cut stage
As the process continued, was gradually worn on workpiece surface. At this time, stone grinding and surface contact area increases, unit area pressure decrease, cutting depth decreases, cutting capacity. At the same time, grinding stone surface pores are clogged, grindstone in a State of half cut. This phase is known as the half-cutting stage, half-cut phase cutting traces on workpiece surface lighter and the darker shade of gloss appears.
(3) the stage of finishing
This is the final stages of finishing. As the workpiece surface is gradually worn, grinding stones and further increase the contact area on the surface of the workpiece, and millstone and gradually Lube between the surface membrane isolation, pressure on a unit area is very small, is not sufficient to make millstones from the sharp, cutting reduced last tends to stop cutting. This phase is called the finishing stage. Finishing stage without cutting traces on the surface, there is a general gloss.
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