When the honing pipe is operated, the surface layer has residual surface compressive stress, and the surface is slightly cracked to avoid the expansion of the erosion effect, thereby improving the surface corrosion resistance and slowing the generation or expansion of the crack. By rolling forming, the rolling surface forms a cold hardening layer, which reduces the elastic and plastic deformation of the grinding contact surface, thereby improving the wear resistance of the inner wall of the honing pipe to avoid damage caused by grinding. After rolling, the surface roughness value is reduced to improve the properties of the honing tube.
Rolling processing is a kind of chipless processing, which utilizes plastic deformation of metal at normal temperature to flatten the microscopic unevenness of the surface of the workpiece to achieve the purpose of changing the surface structure, mechanical properties, shape and size. Therefore, this method can achieve the purpose of finishing and strengthening at the same time.
Honing tube for constant pressure
The first stage 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 worn away. 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 by the cutting pressure, and the oil stone surface is exposed. Abrasive grain, this is the oil stone self-sharp.
The second stage is the crushing and 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 these chips have little wear on the adhesive. 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.http://ht-tube.com/