The first stage is the off-cutting stage, this constant pressure honing, at the beginning due to rough hole wall, oil stone and hole wall contact area is very small, contact pressure, the protruding part of the hole wall is quickly grinding away.
And the oil stone surface due to contact pressure, coupled with chip on the oil-stone binder wear, so that the combination of abrasive and binder strength decreased, so that some abrasive particles in the role of cutting pressure on their own off, the oil stone surface is exposed to new abrasive grains, this is the oil Shiyi. The second stage is the crushing cutting stage, along with the honing, the pore surface becomes more and more light, and the contact area of the oil and stone is getting larger, the contact pressure of unit area decreases and the cutting efficiency is reduced. At the same time cut the chip small and thin, these chips on the adhesive wear is also very small. Therefore, the oil stone particles fall off very little, at this time grinding is not by the new abrasive particles, but by the abrasive tip cutting.
Thus, the abrasive tip load is very large, the abrasive particles are prone to rupture and crumble to form a new cutting edge. The third stage is to block the cutting stage, continue honing the oil stone and hole surface contact area is more and more large, very fine chip accumulation in the oil stone and the hole between the wall is not easy to exclude, causing the oil stone blocked, become very smooth. Therefore, the oil stone cutting capacity is very low, equivalent to polishing. If continued honing, the oil stone blockage serious and the adhesive jam, the oil stone completely loses the cutting ability and the serious heat, the hole precision and the surface roughness will be affected. The honing should be finished as soon as possible.