Steel and aluminum extruded finned tube radiator is a kind of high-efficiency, energy-saving and environmentally friendly heat dissipation equipment, which is widely used in various heating systems. The steel and aluminum extruded finned tube radiator conducts heat from the equipment or element to be dissipated to the surface of the radiator through the structural design and air flow of the extruded finned tube, and takes away the heat through convection heat dissipation. The production process mainly includes raw material preparation, extrusion molding, fin cutting, welding and finished product inspection. 
1. Preparation of raw materials.
Steel: high-quality low-carbon steel plate is selected, and the thickness is determined according to the design requirements, generally using 05-2.0mm steel plate. The steel should have a good surface quality and be free of rust, oil and other impurities.
Aluminum: Aluminum ingots with high purity are selected and processed into aluminum tubes through smelting, casting and extrusion. The wall thickness of the aluminum tube should be uniform, the inner and outer surfaces should be smooth, and there should be no defects such as porosity and cracks.
Fin material: According to the design requirements, you can choose different fin materials, such as aluminum foil, stainless steel, etc. The fin material should have good thermal conductivity and corrosion resistance.
Other materials, such as welding wire, sealing materials, etc., should meet the relevant standards and design requirements.
2. Extrusion.
Steel plate pretreatment: The steel plate is pre-treated such as leveling, cutting and bending to facilitate subsequent forming operations.
Aluminum tube extrusion: The aluminum ingot is heated to an appropriate temperature and extruded into an aluminum tube of a certain specification through an extruder. During the extrusion process, parameters such as extrusion speed, temperature and pressure should be controlled to ensure the quality and stability of the aluminum tube.
Finned tube combination: Extruded aluminum tube is combined with pre-prepared fin material to form finned tube. The assembly method of the finned tube can be selected according to the design requirements, and it is generally fixed by welding or mechanical clamping.
Weld inspection: Inspect the weld inside the finned tube to ensure that the welding quality meets the requirements. Non-destructive testing can be performed using methods such as X-ray testing or ultrasonic testing.
3. Fin cutting.
Cutting equipment: Choose appropriate cutting equipment, such as laser cutting machines, mechanical knives, etc., and cut according to the specifications and length requirements of the fin tube.
Cutting process: According to different cutting equipment and materials, formulate reasonable cutting process parameters, such as cutting speed, cutting depth, etc. At the same time, defects such as smoothness of the cutting section, punctures and cracks should be ensured.
Cutting treatment: The cut finned tube port is treated, such as grinding, deburring, etc., to ensure tight bonding with adjacent finned tubes.
Fourth, welding process.
Welding equipment: choose appropriate welding equipment, such as automatic welding machine, argon arc welding machine, etc., and choose the appropriate welding method according to the material and thickness of the fin tube.
Welding process parameters: formulate reasonable welding process parameters, such as welding current, welding speed, welding wire type and diameter, etc. At the same time, the heat input and cooling rate in the welding process should be controlled to ensure the welding quality.
Weld quality inspection: The weld quality inspection of the welded finned tube can be carried out non-destructive testing by X-ray testing or ultrasonic testing to ensure that the weld quality meets the requirements.
5. Principle of steel and aluminum extruded fin tube radiator:
1.Structural design: The steel-aluminum extruded finned tube radiator is composed of one or more internal extruded finned tubes. The outer surface of the extruded finned tube is a layer of structure with a fin-shaped shape, providing a larger surface area.
2.Heat Conduction: The steel and aluminum extruded finned tube radiator conducts the heat generated by it to the surface of the radiator through contact with the equipment or element to be dissipated.
3.Air Flow: The extruded fins on the surface of the radiator increase the radiant area of the heat, and when the air passes through the radiator, it can come into contact with the extruded fins and take away the heat. This way of moving heat away from the surface of the radiator through air movement is called convection heat dissipation.
4.Heat dissipation: The heat is dissipated through conduction and convection through the radiator ducts and extruded fins, and is eventually carried away. The design of the squeezed finned tube increases the surface area, which improves heat dissipation. In addition, heat sinks often need to be equipped with fans or convection-enhancing devices to promote air flow and improve heat dissipation efficiency.
6. Inspection and packaging of finished products.
Appearance inspection: Conduct visual inspection on the finished finned tube radiator to check whether the finned tube has obvious defects such as scratches, pits, and deformation. At the same time, the assembly structure of the finned tube should be ensured to be firm, smooth and beautiful.
Pressure test: Conduct a pressure test on the finned tube radiator to check whether its air tightness and pressure resistance meet the requirements. The test can be carried out using methods such as water pressure or air pressure test.
Packing: According to customer needs and transportation requirements, the finished finned tube radiator is properly packaged. The packaging material should have functions such as moisture-proof, shock-proof, and rust-proof to ensure the safety and integrity of the product during transportation and storage.
Identification and recording: Identification and recording of the finished finned tube radiator, including product name, specification model, production date and batch number. At the same time, a sound production record and quality traceability system should be established to ensure product quality and traceability of the production process.
Delivery & Installation: Deliver the finished finned tube radiator to the customer in accordance with the delivery time and transportation method agreed in the contract, and provide the necessary technical support and installation guidance. During the installation process, it should be installed correctly in accordance with the product manual and technical requirements to ensure the performance and safety of the radiator.
After-sales service: Establish a perfect after-sales service system to solve the problems and failures encountered by customers in the process of use in a timely manner. At the same time, regular return visits and maintenance guidance should be carried out to customers to improve customer satisfaction and service life.
The production process of steel and aluminum extruded finned tube radiator involves multiple links and multiple processes, and the quality control of each link is crucial. Enterprises should strengthen the monitoring and management of the production process, improve the skill level and work responsibility of employees, to ensure product quality and stability.