The forging die of construction machinery is subjected to great force and pressure under various working conditions, and its failure analysis and prevention strategy are very important to improve the service life of the die and ensure production safety. This paper will analyze the common failure forms of construction machinery forging die, and provide corresponding prevention strategies, in order to provide reference for related industries.
First, fatigue fracture
Fatigue fracture is a common failure mode of die, which is usually caused by stress concentration and crack propagation caused by cyclic load. Prevention strategies are as follows:
- Choose the right material: The preferred material has a high fatigue resistance, such as high-strength steel.
- Optimization design: reduce the occurrence of stress concentration, using arc transition, chamfering and other measures.
- Control the working load: reasonable design of the load, avoid overload, reduce the stress amplitude.
- Regular maintenance: carry out fatigue detection, timely find and replace mold parts with serious fatigue.
Second, wear and wear particles hold teeth
In the working process of the forging die of construction machinery, due to contact stress and friction and other factors, the surface of the die will appear wear and abrasive teeth. Prevention strategies are as follows:
- Material selection: Select high hardness, wear resistant materials, such as alloy steel with certain hardness and wear resistance.
- Surface treatment technology: The use of surface hardening, coating protective layer and other technologies to improve the surface hardness and wear resistance of the mold.
- Control working conditions: reasonable control of working temperature and lubrication state, reduce friction, reduce wear.
- Regular maintenance and replacement: regularly check the mold surface wear, timely maintenance and replacement.
Three, plastic deformation and fracture
In the working process, the forging die of construction machinery may be affected by the working temperature, stress, load and other factors, resulting in plastic deformation and fracture. Prevention strategies are as follows:
- Suitable material selection: Select materials with high strength and toughness to improve the tensile strength and toughness of the mold.
- Control the working temperature and stress: avoid exceeding the bearing range of the mold, and take cooling and heating measures to balance the temperature stress.
- Regular inspection and maintenance: regular inspection of the mold, timely discovery and repair of cracks and defects.
- Strengthen mold maintenance: reasonable storage and use of molds, regular cleaning, lubrication, rust prevention, etc.
Corrosion and oxidation
Construction machinery forging dies are often subjected to corrosion and oxidation in the environment, resulting in a decline in surface quality and loss of function. Prevention strategies are as follows:
- Material selection: Select materials with good corrosion resistance and oxidation resistance.
- Surface treatment technology: The use of protective coating, chemical coating and other technologies to improve the corrosion resistance of the mold.
- Environmental control: Control the temperature, humidity, pH and other factors of the mold use environment to reduce the chance of corrosion and oxidation.
- Regular testing and cleaning: regularly check the mold surface to remove corrosion and oxide in time.
The failure analysis and prevention strategy of construction machinery forging die need to consider the material characteristics, design parameters, working environment and use conditions of the die. Through appropriate material selection, optimal design, control of working conditions and regular maintenance measures, the service life of the mold can be effectively extended, the work efficiency can be improved, and the safety and reliability of the production process can be ensured.
