1. The first stage of the honing pipe is the shedding cutting stage: this constant pressure honing starts at the beginning due to the rough wall of the hole, the contact area between the oil stone and the hole wall is small, the contact pressure is large, and the convex portion of the hole wall is quickly ground. go with. However, due to the high contact pressure on the surface of the oil stone and the wear of the oil-and-binder binder by the chips, the bonding strength between the abrasive particles and the binder is reduced. Therefore, some of the abrasive grains fall off under the action of the cutting pressure, and the oil stone surface is exposed. Abrasive grain, this is the oil stone self-sharp.
2. The second stage of the honing pipe is the crushing cutting stage. As the honing progresses, the surface of the hole becomes more and more light, the contact area with the oil stone becomes larger and larger, the contact pressure per unit area decreases, and the cutting efficiency decreases. At the same time, the cut chips are small and fine, and the wear of these chips on the adhesive is also small. Therefore, the oil stone abrasive grains are rarely peeled off, and the grinding is not performed by the new abrasive grains but by the abrasive grain tips. Therefore, the tip of the abrasive grain is very heavy, and the abrasive grain is easily broken and broken to form a new cutting edge.
3. The third stage of the honing pipe is the clogging cutting stage. When the honing is continued, the contact area between the whetstone and the hole surface is getting larger and larger, and the extremely fine swarf is accumulated between the whetstone and the hole wall, which is difficult to remove, causing the oil stone to clog and become very smooth. Therefore, the oil stone cutting ability is extremely low, which is equivalent to polishing. If the honing is continued and the oil stone is clogged and the adhesive blockage occurs, the oil stone completely loses its cutting ability and is severely heated, and the accuracy and surface roughness of the hole are affected. At this point, the honing should be ended as soon as possible.www.ht-tube.com