The gear shaft of the speed reducer breaks teeth, the reason for the disconnection of the shaft analysis
Posted by Admin
0 | Jul 13,2022 17:06
The gear shaft of the reducer construction field of the reason Under general conditions, the gear shaft reducer of the gear reducer is easy to produce fracture position is located in the middle of the shaft and shaft construction articulation and coupling position. The location of the shaft and shaft coupling is generally in the area of journal transformation, and the location of the journal reducer is usually the location where the reducer will begin to fracture. This is also because the position of the shaft profile look shift and the position between the shaft at the location has been in a relative vertical geometry position association, and these structures will certainly cause the shaft and the shaft coupling position suffer from different stress problem hazards.
In general, the main reason for the gear shaft breakage and decoupling of the reducer is the danger of the external force, and the centralized twisting force of the gear shaft breakage and decoupling of the reducer is only one of the relatively common ones. In addition to the shaft and shaft coupling position, the location of the gear shaft of the reducer is also one of the key factors that cause the gear shaft of the reducer to break and disconnect. The primary factor depends on the size of the shaft bearing force and the diameter of the shaft specification is inversely proportional, therefore, the smaller the shaft journal, the greater the external ground stress suffered by the gear shaft of the reducer.
The location of the gear shaft of the reducer at the root of the slot is exactly the location where the journal reducer is less, therefore, the external ground stress suffered at the root of the gear shaft of the reducer at the slot is higher than other locations. Once the external ground stress exceeds the bearing capacity of the gear shaft groove of the reducer, fracture will occur.
In addition, the location of the shaft drive gear slot must also carry out a rigorous heat treatment process. I do not know in the real many dealers in order to better reduce the cost of products, in the production process of part of the equipment, and did not achieve a better heat treatment process. And once the heat treatment process is not carried out may cause the gear shaft of the reducer health slot location of the ground stress fatigue, resulting in shaft drive gear caused by fracture. For gearboxes, the fracture of the gear shaft of the gearbox will undoubtedly be harmful to the regular application of the gearbox.
The gear shaft of the reducer is not made of the required material. The gear shaft of the reducer has a key effect on the regular operation of the reducer, therefore, the material of the gear shaft of the reducer must meet the corresponding regulations. However, in many cases, the material chosen for the gear shaft of the reducer does not comply with the design drawings. As a result, the bearing capacity of the gear shaft of the speed reducer to the external ground stress is somewhat reduced in reality. Therefore, in such cases, the gear shaft of the reducer is likely to break even under normal operating conditions.
Since in reality, many manufacturers are going to use 50 steel instead of 42CrMo, the text is here to analyze the alloy microscope mechanism of the gear shaft of the two materials reducer. Reducer first, we have to do is to two different materials of the gear shaft of the gearbox to carry out sampling solutions, and prepare in advance a certain amount of use of 4.2% concentration value of aqueous sodium nitrate solution as a reflection of the experimental reagents; second, in order to better reflect the actual effect, must also be prepared in advance a certain amount of ethanol, the primary factor depends on the aqueous sodium cyanide solution mixed with alcohol solution can enhance its leaching actual effect The primary factor depends on the ability of the aqueous sodium cyanide solution mixed with alcohol solution to enhance its actual effect of leaching. After a certain period of etching, we can use the metallographic microscope on the gear shaft of the reducer to carry out observation. The microscope mechanism of the gear shaft of the gearbox made of 50 gauge steel shows a honeycomb metallographic organization with some lumpy ferrite. The gear shaft specimen of the 42CrMo reducer showed quenched brittleness and a little metallographic organization.
The characteristics of the gear shaft specimens of the two types of gearboxes are also very different. In general, the properties and hardness of brittlenite are very different after a series of solutions, especially at the level of hardness and flexibility, and the properties of brittlenite are very prominent. And for the gear shaft of the reducer reducer, the greater the compressive strength of the gear shaft of the reducer, the stronger the ductility of its probability of fracture will be smaller. Looking back at the gear shaft of the gear reducer made of 50-gauge steel, the compressive strength of steel is not easily transformed because of the low degree of harm caused by the Weiss mechanism. However, the emergence of the Weiss mechanism for steel plastic deformation has a great danger, the primary factor depends on the occurrence of the Weiss mechanism is generally with the martensite crystallization, and martensite crystallization for the structural mechanical properties of steel can lead to great harm, especially for the steel impact resistance toughness will produce a lot of damage.
Special attention is paid to the occurrence of the Weiss mechanism is generally all because the steel gear shaft of the gear reducer in the warming process, not to adjust the temperature caused by, and Weiss mechanism in different ambient temperatures, the performance caused are not the same. But overall, the higher the temperature solution, the gear shaft flexibility of the reducer will be relatively lower, which will cause the gear shaft of the reducer to fracture. The performance of the gear shaft of the reducer made of 42CrMo is different from that of the reducer, therefore, the selection of the gear shaft of the reducer using this material is one of the effective ways to prevent the gear shaft of the reducer from breaking in real.