The cutting blade of the combine harvester is fixed on the knife holder by riveting. If the moving blade or the stationary blade loosens, it should check whether the blade assembly is stuck or collided, and avoid blindly welding the blade to the blade holder. Because the moving tool holder is a thin and long rod part, it is locally heated after multi-spot welding. Once it cools, it is prone to warp deformation. When the tool holder moves, it will block and interfere with each other on the upper and lower blades, further exacerbating the tool holder and pressure blade. V-groove wear. At the same time, it is difficult to adjust the blade clearance according to technical requirements after the tool post is deformed, resulting in deterioration of the cutting performance.
Many parts of the combine harvester are stamped from 2 mm sheet steel. When they are rusted and cracked, they should be less welded and riveted. That is, iron plates should be riveted and reinforced as much as possible. Welding repairs should not be carried out swiftly because electric welding can easily break through the steel plate. New cracks often appear after the parts are stressed.
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