Fatigue damage of mixing station parts: manifestation: fracture, surface spalling: treatment method: improve the surface finish of parts in the manufacturing process, and adopt mild section filtration to reduce the stress concentration of parts. In addition, carburizing, quenching and other methods can be used to improve the hardness, toughness and wear resistance of the parts.
For some common damages, appropriate repair measures can be taken,
Crack repair: the crack can be repaired by fitter repair, welding repair and adhesive repair, but no matter what method is used to repair the crack, the crack stop holes must be drilled at both ends of the crack to prevent the expansion of the crack. At the same time, the oil and oxide scale near the crack must be removed. Fitter repair is mainly used to repair the cracks in the less important parts, and the common methods are to reinforce the upper plate or to fasten the key. When the box parts are repaired by welding, the welding process parameters should be strictly followed, and "heating stress reduction" and other measures to reduce stress and prevent deformation should be taken.
Repair of holes. When the hole on the box body is worn or other inner surface is damaged, it can be repaired by restoring the fitting accuracy of the shaft or bearing and the hole. When the wear of hole wall is small, the hole wall or journal and bearing outer ring can be repaired by chrome plating; when the wear is serious, the method of inlaying sleeve can be adopted, and for some holes inlaid with bushing, the method of replacing or repairing bushing can be used. When repairing the hole, it should be considered with the shaping of the box, that is, the parallelism error between the center distance and the center line of the hole should be considered.
Welding repair, preheating the workpiece before welding repair and welding heat during welding will cause the deformation of the workpiece, so it should be arranged in the previous process; bonding repair, because some adhesives also need to be heated and solidified during bonding repair, it may also cause the deformation of the workpiece; restore the repair processing benchmark, and detect the deformation; bench repair, shaping and inlaying machining.
The above is the self feeding mixer http://www.zkzsljbc.com
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