The honed tube has a lot of pitting on the surface before processing, which is an important factor affecting the quality of the honing tube. In order to obtain a good quality hydraulic cylinder tube after honing, these pitting points need to be repaired. So, what are the repair methods for the surface defects of the honing pipe?
1. Increase the amount of cold drawing deformation
Increasing the cold drawing deformation times and increasing the total deformation amount can achieve the purpose of reducing the pitting depth and reducing the honing grinding allowance.
2. Preferred hot rolled tube blank
Cold-drawn pipe pitting defects are caused by hot-rolled pipes. Therefore, by selecting hot-rolled pipes with small degree of corrosion and uniform wall thickness, pitting defects can be reduced and the yield of cylinders can be improved.
3. Hot rolling pipe inner hole defect cleaning