Is your bucket tooth worn? How to improve the service life of your excavator bucket teeth?

Bucket tooth is one of the main parts of excavator. In the process of excavation, bucket teeth mainly work on ore, rock or soil. Bucket teeth not only suffer from sliding wear, but also bear a certain impact load, which greatly shortens the service life of bucket teeth.

Why Bucket Teeth are Worn

When the excavator is working, each working face of the bucket teeth is in contact with the object to be excavated, and the stress situation is different in different working stages of the excavation process.

First of all, when the bucket teeth contact with the material surface, because of the fast speed, the tip of the bucket teeth will be subjected to strong impact load. If the yield strength of the bucket tooth material is low, plastic deformation will occur at the end. As the digging depth increases, the pressure on the bucket teeth will change.

Then, when the bucket tooth cuts the material, the relative movement between the bucket tooth and the material produces a large extrusion on the surface, so as to produce friction between the working surface of the bucket tooth and the material. If the material is hard stone, concrete, etc., friction will be greater.

This process repeatedly acts on the working face of the bucket teeth, producing varying degrees of wear, and then producing deep trenches, leading to the scraping of the bucket teeth. Therefore, the quality of the surface of the bucket tooth wear layer directly affects the service life of the bucket tooth.

7 ways to improve the service life of bucket teeth

Choose the right welding material

1. In order to improve the wear resistance of bucket teeth, it is necessary to choose reasonable welding materials for surfacing welding (high manganese steel is widely used in high impact wear conditions). In order to obtain a bucket tooth with good wear resistance, it is often necessary to further optimize the material composition to achieve the design of high hardness and toughness components.

Bucket tooth type

Daily maintenance

2. The wear of the bucket teeth on both sides of the excavator is about 30% faster than the middle. The two sides and the middle bucket teeth can be used interchangeably, thus reducing the number of repairs, indirectly increasing the service life of the bucket teeth.

3. Repair bucket teeth in time before reaching the limit.

4. When the excavator is working, it is necessary to pay attention to the fact that the bucket teeth should be perpendicular to the working face when digging, so as not to destroy the bucket teeth due to excessive tilt.

5. When the resistance is large, avoid swinging the digging arm from left to right, and avoid the fracture of bucket teeth and tooth pedestal caused by too much left and right force.

6. It is recommended to replace the gear seat after 10% wear. There is a large gap between the worn gear seat and the bucket teeth. Bucket teeth are easy to fracture because of the change of stress point.

7. Improving the driving mode of excavator is also very important to improve the utilization rate of bucket teeth. When lifting the arm, the excavator driver should try not to fold up the bucket and pay attention to the coordination of operation.