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Simple agricultural machinery parts heat treatment method
During the use of agricultural machinery, component damage occurs from time to time and is sometimes a major component. Self-manufactured, some mechanical processing technology can meet the original design requirements, but it is difficult to solve quality problems in heat treatment process equipment. For example, the processing of a shaft is made up of a number of processes. Among them, the process with higher difficulty is heat treatment. This kind of heat treatment requires a uniform temperature, a constant temperature, and a long holding time, and requires more than 48 hours. The general mechanics department failed to meet this design requirement and there was no such special equipment. In order to repair the emergency without reducing the quality standard, the method of heat treatment for mechanical refining can be used in the earth method of self-made sawdust furnace. First, the shaft to be replaced according to the requirements of the drawings first selected materials, draw a good plan. Then according to the requirements of the drawings for processing. After being processed, it should be properly kept, and it cannot be placed obliquely or flatly to prevent deformation. It is required to be placed or suspended. Second, the heat treatment furnace should be designed according to the length, diameter, material model and heat treatment quality standard of the treated parts. Find an iron drum or square bucket that is higher than the parts to be treated or use bricks. The bottom is covered with bricks, leaving the air duct. Then hang the parts that need to be treated with wires or wires in the center of the furnace. Then use sawdust to fill the entire furnace with compaction and bury the entire part to be processed. The top of the sawdust is more than 200mm above the treated part, and the sawdust filling thickness around the furnace is also more than 200mm away from the treated part. After filling the sawdust, the top is covered with brick or other refractory material, and a through hole is made in the middle. Then ignite from the bottom, to control the fire, not to open fire, requiring uniform smoldering more than 48 hours. After the sawdust is completely cooled in the furnace, it is cooled and then removed for secondary finishing. With this method, the quality is in line with the standard, and the pulling force is good, the toughness is strong, and the money is saved.