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Choosing excavator bucket teeth effectively, wear resistance will be improved!
2023-04-28
Manufacturing process of bucket teeth
2023-05-05

The Problem of Bucket Teeth Failure of Excavator

The excavator bucket tooth is an important part of the excavator, and it is also a very easily damaged part. How much do you know about the failure of excavator bucket teeth?

Excavator bucket teeth

Reasons for failure of excavator bucket teeth

  • As the excavation depth increases, the force on the teeth will change. When the bucket teeth cut the material, the bucket teeth and the material make relative motion, which generates a large positive extrusion force on the surface, thereby generating a large friction force between the bucket tooth working surface and the material.
  • Stress analysis The working surface of the bucket tooth is in contact with the material to be excavated. During a complete excavation process, the forces received by different working stages are different.
  • When the tip of the tooth just touches the surface of the material, due to the high speed, the tip of the bucket is strongly impacted. If the yield strength of the tooth is low, plastic deformation occurs at the tip of the tooth.
  • If the material is hard rock, concrete, etc., the friction will be high. Due to the repeated action of this process, different degrees of surface wear will occur on the working surface of the bucket teeth, and then deeper grooves will be produced.

Failure Mode of Excavator Bucket Teeth

Excavator bucket teeth are subject to different degrees of wear and impact under different working conditions, which will cause different degrees and different forms of failure. For example, there are obvious groove-like scratches on the front working surface of the excavator bucket teeth, and the tooth tip has a certain degree of plastic deformation.

summarize

The excavator bucket teeth are made of low-alloy wear-resistant steel, which is more suitable for bucket teeth. However, due to the lack of heat treatment, the structure of the bucket teeth of the excavator is uneven, the inserts do not play a role, and the overall wear resistance of the bucket teeth is poor, resulting in early failure.

It is recommended that the castings be properly normalized after casting to improve the structure and performance and increase the service life of the bucket teeth of the excavator. Castings undergo reasonable heat treatment, and under the same working conditions, the service life of excavator bucket teeth can be increased by more than 2 times.