Reasons Of Tooth-fighting Of Ball Mill
Cause Analysis
Cause Analysis
(1) maintenance program unreasonable
The impact of the phenomenon in the operation, resulting in the gear easier to break.
(2) gear processing of poor quality
Rough machining of the tooth root parts of the high stress concentration, is not a smooth transition, exacerbated by the stress concentration; adverse material processing, grain flow line distribution along the tooth profile, and can not get a good comprehensive mechanical properties; gear is cantilever load, the tooth root equivalent to the fulcrum of the cantilever, parts of the tooth root
Withstand the maximum bending stress, the crack in the tooth root.
3 gear parameters mapping is not accurate
Assembly results, the transformation of Surveying and Mapping gear helix angle, and modulus are not accurate, the difference between the gear tooth profile with the old tooth larger. Overlap is small when the engagement, the impact of gear a certain point the stress is too high, the tooth is easy to break.
(4) heat treatment process immature
Gear tooth root quenching does not strengthen, the bending strength is low; the tooth surface hardening strengthening layer is too shallow, not long to touch load bearing block, so early crushed deformation. Once the tooth profile accuracy, the gap increases, the introduction of the additional load.
Treatment measures
(1) optimization of the maintenance program
As the line gear has some wear and tear or partial failure, the new gear with meshing, the contact is poor. In order to ensure the normal gear engagement, should be arranged into sets of assembly, full running-. Running - can increase the contact area of the tooth, the tooth surface finish and exposure accuracy, and the elimination of local stress, the formation of the cold hardening of the tooth surface, thereby increasing the carrying capacity of gears and prolong life.
(2) strict processing quality
Design, the manufacture of gears should be emphasis on the importance of the tooth root fillet, to ensure a smooth transition, without causing additional stress concentration; improve manufacturing precision, so that the load distribution, to reduce the dynamic load coefficient; gear material changed by the 45 # steel 42crmo, processing, grain flow lines along the tooth profile distribution in order to get a good comprehensive mechanical properties.
Fixed reducer gear parameters
Re-mapping, the tooth helix angle and the modulus correction to ensure the parameters of the accuracy of gear for precision machining, improve the smoothness of the degree of coincidence of the gear and drive, thereby increasing the carrying capacity of the gear.
To develop a reasonable heat treatment process
Tooth root bending ability to decide on the organization, strengthen by quenching, can increase the resistance to bending and deformation capacity, thus extending the life of the gear; to ensure long gear bearing contact with the load, to avoid premature been crushed deformation to introduce additional loads to be re- The rational design of the tooth surface hardening strengthening layer thickness.
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Limestone dryer,
Mineral impact crusher,
Ore spiral classifier,
Jaw crusher,
Vibrating screen, Henan Hongxing mining machinery Co.Ltd has ascended in the front rank of the world in the exporting of mining equipments.
by: nicole
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