How to repair shaft and gear wear

Hunan Jintai Hardware and Machinery Co., ltd. Tell us that the wear of the shaft of the gear pump is mainly due to the conflict between the shaft and the support needle, so that the shaft diameter becomes smaller. If it is subtle wear, you can add a layer of hard chrome to increase the diameter of this part of the axis scale, so that the axis is amended. If the shaft wears tough, it should be 45 steel or 40Cr steel from scratch, shaft rough by the rough, fine car, the bearing parts to heat treatment, hardness HRC60-65, and then by grinding, so that the bearing surface roughness Ra Greater than 0.32μm; roundness and cylindrical degree of tolerance of 0.005mm; with the gear parts by H7 / h6, the surface roughness Ra should not be greater than 0.63μm. The wear parts of the gears are mainly the meshing of the teeth, the involute working face and the gear plane. Subtle wear, the tooth surface can be used stone grinding, two flat and polished in the flat grinding. Gear tooth surface grim wear should replace the new gear, if only the two sides of the gear surface wear, grinding grind in the surface grinder.