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Principles of setting constant pressure for honing tubes

   Due to the high contact pressure on the surface of the whetstone and the wear of the whetstone binder by chips, the bonding strength between the abrasive grains and the binder decreases. Therefore, some abrasive grains fall off on their own under the action of cutting pressure, and new abrasive grains are exposed on the whetstone surface, which is self-sharpening of the whetstone.
   At the same time, the chips cut are small and fine, and the wear of these chips on the binder is also very small. Therefore, the whetstone abrasive grains fall off very little. At this time, grinding does not rely on new abrasive grains, but is cut by the abrasive grain ends. Therefore, the load on the end of the abrasive grain is very large, and the abrasive grain is easy to break and collapse to form a new cutting edge. As honing continues, the contact area between the whetstone and the hole surface becomes larger and larger. Fine chips accumulate between the whetstone and the hole wall and are difficult to discharge, causing the whetstone to become clogged and become very smooth. Therefore, the cutting ability of whetstone is low, which is equivalent to polishing. If honing is continued and the whetstone is seriously clogged and adhesive blockage occurs, the whetstone loses its cutting ability and becomes severely heated, and its hole accuracy and surface roughness will be affected. At this point, honing should be completed as soon as possible.
  
   The appearance of pits and pores on the surface of the pipe is also related to the defects of the pipe itself. We should try to avoid problems caused by the pipe itself and try to further process the pipe to reduce the occurrence of defects such as pores and pits and increase the production efficiency and quality of the pipe.
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