In the manufacture of steel-aluminum composite finned tubes, it is crucial to achieve a tight connection between the aluminum fins and the steel tubes. Here are a few common connection methods:
Extrusion method The extrusion method is to extrude aluminum fins through a die into a pre-grooved steel pipe to form a strong connection. This method is simple and fast, and it is suitable for high-volume production.
Welding method The welding method is to use argon arc welding, laser welding and other processes to weld aluminum fins directly to the steel pipe. This method can ensure the strength of the connection between the fins and the base tube, but the requirements for equipment and technology are high.
Gluing The gluing method is to bond aluminum fins to steel pipes with a special adhesive. This method is suitable for materials that cannot withstand high temperatures, or where you do not want to change the original properties of the material.
4.Cold rolling method The cold rolling method is to pass the aluminum fin and the steel pipe through a special roller at the same time to make the two fit tightly. This method has the advantages of easy operation and high efficiency.
5.Forging method The forging method is to tightly combine the aluminum fins with the steel pipe in a heated state. This method is usually used in applications where high strength and high precision are required.
Choosing the right connection method should be based on factors such as specific application needs, production conditions, and cost-effectiveness. Regardless of the method used, it is critical to ensure a strong, stable connection between the aluminum fins and the steel tubes to ensure the performance and longevity of the heat exchanger.