Excavator Undercarriage Parts R60 Sprocket For HYUNDAI?>
Product origin :Quanzhou Fujian China
Delivery time :30days
Supply capacity :20000pcs
After the standard heat treatment of the drive wheel blank of our sprocket, the hardness of the substrate reaches above HB235, and the drive teeth are subjected to medium frequency induction hardening and low temperature tempering. The surface hardness can reach HRC48-54, and the hardening depth is higher than 5-10mm (HRC45). It not only provides accurate power under harsh working conditions, but also has excellent wear resistance and has the effect of extending product life and reducing customer costs.
|Place of Production||Quanzhou Fujian China|
|Use||Excavator, Bulldozer, ect|
|Technology||Forging Casting/Smooth Finish|
|Color||Commonly use color, Customized|
Gear tooth fracture usually occurs at the root of the tooth. One is that due to the normal pressure Fn moving along the tooth surface, the tooth root stress is constantly changing (if one side is stressed, the tooth root bending stress is a pulsating cyclic stress; if the two sides are stressed, the tooth root bending stress is a symmetrical cyclic stress), At the same time, stress concentration caused fatigue cracks in the tooth root. After a long-term stress cycle, the cracks continue to grow, resulting in fatigue fracture of the entire tooth. The other is that the gear teeth suddenly break due to short-term severe overload. The fracture form can be judged from the fracture. Fatigue fracture is caused by repeated compression and expansion at the fatigue source where the microcracks are generated, resulting in fracture. Therefore, most of the fracture area is relatively bright and flat. The fracture that breaks suddenly is rough. In addition, there are more common random broken teeth, which refers to broken teeth caused by unexpected conditions. Its prominent feature is that the broken part of the gear is not where the bending stress of the tooth root is large, it may be broken at any part of the gear, including the whole tooth or the defective part of the tooth. Analyze the design parameters and choose a sprocket module that is too small when the design is unreasonable. This results in a large tooth root bending stress. When the safety factor is at a critical value, the load increases. Both may cause the sprocket teeth to break.
Improper use and maintenance. When the new equipment is put into production, the sprocket transmission has a running-in period. During the running-in period, due to errors in manufacturing and assembly, and uneven surface irregularities, only the tooth surfaces of the meshing gears actually contact. Therefore, during the initial operation, these contacted parts will wear out first due to the large force per unit area. However, after the sprocket has been running for a period of time, the actual contact area between the meshing tooth surfaces has increased, the force per unit area has been relatively reduced, and the lubrication conditions have been further improved. Therefore, this initial tooth surface wear phenomenon It will gradually disappear. This process is the running-in (running-in) of the sprocket drive. The sprocket wear phenomenon that occurs in the running-in process of the sprocket drive is called running-in wear. It can be seen that the running-in wear is not only harmless to the sprocket, but also a necessary course for the new sprocket drive during the trial operation. The length of the sprocket drive running-in time is related to the roughness of the harder tooth surface. If the harder tooth surface is rough, the running-in time will be longer; if the harder tooth surface is smooth, the running-in time will be shorter. Therefore, the design requires a harder tooth surface with less roughness. Practice has proved that the better the sprocket running, the more ideal the meshing situation. In order to avoid abrasive wear during the running-in process, the lubricant should be changed regularly. If you work at high speed and full load during the running-in period, the wear will be aggravated, abrasive particles will be generated, and abrasive particles will be formed. The tooth surface wear will cause the tooth profile to change, the tooth thickness will become thin, and severely, it can cause the gear teeth to break. For example, during the construction of a ZL-50C loader (the engine is 6135K-9a), the driver felt that the loading of the machine was gradually weakened. Observing the instrument, he found that the water temperature was high and the oil was not pressured, so he immediately stopped the machine for inspection.