1, oxygen-acetylene flame baking scratch site, temperature control, in order to avoid surface annealing, baking until no spark appears on it, will seep to the metal surface of the lubricating oil are baked out;
2. Use an angle grinder to treat the worn surface, grind 1mm or more, and polish the groove along the outer wall of the cylinder, preferably the scratch part of the depth of the dovetail groove. After drilling deeper scratches, To adjustDrilling force;
3. Clean the surface of the worn column with absorbent cotton soaked with acetone or ethanol, and wipe the dust and iron filings clean;
4. Apply evenly stirred metal repair material to the scratched surface; The bottom layer should be thinner and evenly cover the scratches on the whole surface to ensure that the bonding material is bonded to the surface of the column. Repeat this action until the repair partThe material is fully filled and ensures that the material reaches the desired thickness, which is slightly higher than the outer wall surface of the column;
5. At a temperature of 24 ℃, the column is stopped for one day. In order to shorten the repair time, tungsten halogen lamps can be used to increase the drying temperature. Each increase is 11 ℃, and the curing time is reduced by half. When conditions permit, the curing temperature can be improved.Adjust to 70 ℃;
6. When the repair material is cured, the excess protruding part can be ground off to ensure that the thickness of the repair part and other parts of the column is constant, and then the surface is plated with hard chrome to ensure that it will not wear and rust after long-term work.