Industrial Sprocket is an easy-to-wear accessory on ind […]
Industrial Sprocket is an easy-to-wear accessory on industrial machinery. For worn gears, we can repair them through some methods to extend the service life of gears and reduce investment in production costs for enterprises. Below we will list the commonly used methods for repairing gears as follows.
1. Insertion method: gears with low load and low speed, when individual teeth are broken, can be repaired by inserting method. First, dovetail grooves are processed at the root of the bad tooth, and the tooth blank is inserted into it with a certain tightness, and welded Or add stabilizing nails to fasten the tooth blank, and then mill out a new tooth shape.
2. Flip method: Single-faced worn gear teeth whose tooth thickness has not exceeded the limit. If the structure permits, the gear can be turned over 1800 and its unweared side is used. The paired gears can be used upside down or replaced with new ones to ensure the normal meshing of the gears. Some asymmetrical wear gears with certain structure can be restructured and then turned over for use.
3. Replacing the gear ring method: first anneal the worn gear, remove all gear teeth, and press the gear ring. To prevent loosening, stabilizing nails can be installed by spot welding or drilling along the matching circumference.
4. Hot forging method: Heat the gear to 800-900°C and put it in the tooth mold to make it plastically deform, squeeze the metal from other parts to the wear surface of the tooth, and heat-treat after shaping.
5. Welding repair method: The cracked parts of the gear teeth are polished with a fine grinding wheel to remove the incomplete fatigue layer, and then repaired by surfacing welding. When welding, the gear should be immersed in water, and then annealed and heat-treated. For steel carburized gears, 20 or 45 steel wire gas welding can be used for welding, or low hydrogen electrode welding can be used. After welding, it can be repaired by machining or manual template repair. Tooth shape, then re-heat-treated and refined with whetstone or ground with abrasive.