Lubrication mode of large extruder and development of lubricating materials
With the progress of science and technology and the development of the national economy, all kinds of large flat width, thin-wall, high-precision, complex solid, aluminum equipment and hollow profiles came into being, and have become the preferred materials in many important fields, such as aerospace, transportation, modern automobile, electronic appliances, Naval Weapons and other departments. Among them, the consumption of large and interrupted aluminum profiles accounts for about 50%, so the extruder is developing in the direction of large-scale.
Although China has introduced a large number of large-scale extrusion technology, long rod hot shear furnace, aluminum rod heating furnace and other equipment, at present, the separation lubrication technology and lubrication functional materials of most large-scale aluminum extruders depend on imported lubricants. At present, the flash point and softening point of solid lubricants used in small extruders in China are too low, and their performance, size and structure cannot meet the requirements of large and medium extruder robots.
There are many methods for processing and lubrication of aluminum profile extrusion press machine plant lines. One is acetylene flame ejector. When it is necessary to lubricate the extrusion gasket, the flame ejector can automatically ignite and spray, and the black smoke during acetylene combustion is used to spray the side of the extrusion gasket in contact with the billet, so that the gasket will not be bonded with the aluminum ingot during extrusion. Generally, squeeze for 3-5 times and lubricate once.
The other is to use boron nitride powder to lubricate the extrusion pad and die sleeve of the extruder; The other is to use special solid lubricant to lubricate the extrusion pad and die sleeve. The advantage of this lubrication method lies in the simple structure of the manipulator, safety and environmental protection.
The advanced large-scale extruder has a reasonable structure, a saw bar machine system, and the production capacity has been brought into full play. Its lubrication and separation technology is worthy of our reference and learning. Only when we develop a lubricant suitable for large-scale extruders, can we save costs for users.