Hydraulic excavator is the main construction machinery of earthwork engineering, which is widely used in traffic, irrigation and water conservancy, urban construction and mechanized construction of modern military engineering. It has strong excavation ability, high productivity, good versatility and easy operation, and plays an important role in engineering construction. Hydraulic excavators excavate earth and rock by means of engineering equipment. The performance and reliability of the working device is one of the important signs of the advanced nature of the whole machine.
The stick is one of the important parts of the working device. In the actual use process, there are many kinds of damage forms of the stick, which affect the normal work of the working device to a great extent. The stick is a kind of rod parts with long length and small cross section. It will produce great bending stress when it works. It is easy to deform and even fatigue fracture when it works under bad working conditions for a long time. In practical work, the damage of the stick mainly occurs in the middle of the stick body and the welding place.
