Honing cutting process during honing pipe processing

- Mar 26, 2019-

In the process of making the honing pipe, it is a kind of high-precision steel pipe material after hot rolling or cold drawing. To some extent, due to the absence of oxide layer on the inner and outer walls of the precision steel pipe, it can withstand high pressure and no leakage. High precision, high finish, cold bending without deformation, flare, flattening without cracks, etc., so the products used mainly for the production of pneumatic or hydraulic components, such as cylinders or cylinders, can be seamless tubes. The chemical components of the honing pipe are carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P, and chromium Cr.

Honing cutting process during honing pipe processing

Constant pressure feed honing: In constant pressure feed, the feed mechanism is pressed against the wall of the hole with a constant pressure, in three stages.

The first stage is the shedding cutting stage. During the operation, the constant pressure honing is mainly 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 wall of the hole is convex. The part was quickly ground. 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.

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 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.

The third stage is the plugging and cutting stage. When the honing continues, the contact area between the surface of the oil stone and the hole is getting larger and larger, and the extremely fine chips accumulating between the oil stone and the hole wall are not easily removed, causing the oil stone to become clogged and become 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 clogging is caused, the whetstone 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

Quantitative feed honing: When the ration is honed, the feed mechanism expands the feed at a constant speed, forcing the abrasive grains to cut into the workpiece. Therefore, there are only detachment cutting and crushing cutting in the honing process, and it is impossible to cause clogging and cutting. When the cutting force is reduced when the oil stone is clogged, the feed amount is larger than the actual grinding amount, and the honing pressure is increased at this time, so that the abrasive grains are detached and broken, and the cutting action is enhanced. When honing in this way, in order to improve the hole precision and surface roughness, it is finally possible to honing for a certain period of time without feeding.