The research of die lubrication and friction of construction machinery forging die is an important subject in die design and manufacture, which is of great significance for increasing die life, reducing energy consumption and improving product quality. In this paper, the basic principles, influencing factors and research methods of mold lubrication and friction are introduced in detail.
First, the basic principle of mold lubrication and friction
- Lubrication principle: The purpose of mold lubrication is to reduce friction and wear on the surface of the mold, provide better friction conditions, and reduce energy loss and heat generation. Common mold lubrication methods include dry lubrication, lubricant lubrication, lubrication film lubrication and so on.
- Friction principle: Friction refers to the forces that hinder the relative movement of the surface of an object in the process of contact with each other. The size of friction is affected by many factors such as contact area, surface roughness, lubrication state and load.
Second, the factors affecting the lubrication and friction of the mold
- Material characteristics: The hardness, surface roughness and lubrication characteristics of the mold material have a direct impact on the lubrication and friction properties. Contact between different materials will produce different friction coefficients and friction characteristics.
- Lubricant selection: The choice of lubricant should be determined according to the mold material and working conditions, common lubricants include grease, liquid lubricants and solid lubricants. The addition of lubricant can reduce the friction and wear of the die surface and improve the friction performance.
- Process parameters: Mold process parameters have an important impact on lubrication and friction properties. For example, the adjustment of parameters such as mold temperature, pressure and speed can change the lubrication state and friction performance, thus affecting the service life of the mold and product quality.
- Research methods
- Experimental test: Through friction test and mold test and other experimental means, measure the friction, wear and friction coefficient of the mold surface. By comparing the experimental data under different lubrication conditions and process parameters, the relationship between lubrication and friction properties of die was analyzed.
- Numerical simulation analysis: Using finite element method or computational fluid dynamics method, the numerical model of mold surface lubrication and friction is established to simulate the lubrication state and friction characteristics. The lubrication and friction behaviors under different conditions were analyzed by changing mold materials, lubricants and process parameters.
- Experience summary and optimization design: Combined with practical experience and production practice, summarize and summarize the influence of different lubrication conditions and process parameters on the lubrication and friction properties of the mold. The lubrication and friction properties of die were improved by optimizing lubricant selection, process parameter adjustment and die design.
Iv. Conclusions and Prospects
The research of die lubrication and friction of construction machinery forging die plays an important role in increasing die life, reducing friction loss and improving product quality. In future research, we should strengthen the in-depth study of lubrication and friction mechanism, develop new lubrication technologies and materials, fully consider lubrication and friction properties in mold design and manufacturing, and contribute more scientific and technological progress to the development of construction machinery industry.
