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Ceramic ball mill reducer tooth cause analysis
1. The maintenance scheme is unreasonable. After the ceramic ball mill reducer, in order to quickly resume production, which is usually replaced in which axis and gears are replaced, and it is not possible to ensure new and old gears meshing. The impact phenomenon is generated, causing the gear to be easier to break.
2, the gear processing quality is poor. The root site of the high stress concentration is rough, not a sleek transition, exacerbated stress concentration effect; material processing, the grain streamline cannot be distributed along the tooth profile, and the gear is unable to load, the root is comparable The bending stress that is affected by the fulcrum of the cantilever beam, the crack will occur in the root of the root.
3, ceramic ball mill gear parameters are not accurate. According to the assembly result analysis, the spiral angle and analog number are not accurate, resulting in a large difference in gear teeth and the old teeth. When engaging, the degree of coincidence is small, the impact is too high, and the gear is too high, and the wheel tooth is easy to break.
4. The heat treatment process is not mature. The new gear root is not quenched, the bending strength is low, and the tooth surface quenching strengthened layer is too shallow, and the shutdown load is not allowed to be supported, so it is prematurely crushed. Once the tooth profile is poor, the gap is increased, and the additional load will be introduced.
Ceramic ball mill reducer tooth treatment measures
1. Optimization of maintenance schemes. Since the online gear has partially worn or local fail, the new gear is engaged with it, the contact condition is not good. In order to ensure that the gear meshes, it should be arranged to assemble and fully run. By running, the contact area of \u200b\u200bthe tote can be increased, improve the finish of the tooth surface, and eliminate local stress, form cold-working dendened tooth layers, thereby improving the load carrying capacity of the gear, extending the service life.
2, strict the processing quality. Design, when manufacturing gears, we should pay attention to the importance of the root rounded, to ensure the smooth transition, do not cause additional stress concentration; improve the processing manufacturing precision, to make the load distribution, reduce the load coefficient; the germplasm is changed from 45 # steel 42CRMO, the grain flow line is distributed along the tooth profile during processing to achieve good summary and mechanical properties.
3, correct the gear parameters in the ceramic ball mill reducer. Reissue, correct the spiral angle and modulus of the wheel to ensure that the parameters of the gear are accurate, in order to accurately process, improve the weight of the gear and the gear, thereby improving the load carrying capacity of the gear.
4. Develop a reasonable heat treatment process. The anti-bending ability of the tooth root is determined in the tissue. By quenching, it can improve the ability of the bending deformation, thereby extending the life of the gear; to ensure that the gear can be supported for a long time to support the contact load, avoiding premature crushing to introduce additional loads, need to be re-needed Design reasonable tooth surface quenching strengthening layer thickness.
