First, the selection of materials.
1. Selection of steel and aluminum.
Steel and aluminum are the main constituent materials of steel and aluminum extruded finned tubes, and their quality and performance directly affect the performance of products. Therefore, in the production process, the selection of raw materials should be strictly controlled to ensure that the composition, purity, and mechanical properties of steel and aluminum meet the requirements of the standard.
2. Surface treatment of materials.
Before steel and aluminum extrusion, the steel and aluminum need to be surface treated to remove impurities such as oil stains and oxides on the surface. This step is essential to improve the bonding strength and heat transfer efficiency of the finned tubes.
2. Extrusion process control.
1. Control of extrusion temperature.
Extrusion temperature is one of the key factors affecting the quality of steel and aluminum extruded finned tubes. Too high a temperature may cause the material to soften excessively, resulting in excessive plastic deformation; If the temperature is too low, the material may be under-deformed and the bond is not tight. Therefore, the extrusion temperature should be strictly controlled during the production process to ensure that it fluctuates within the appropriate range.
2. Control of extrusion speed.
Extrusion speed is another important factor influencing the formation of finned tubes. Excessive speed can lead to uneven material flow and internal defects; Too slow can lead to low productivity. Therefore, it is necessary to reasonably control the extrusion speed according to the properties of the material and the capacity of the equipment.
3. Control of extrusion pressure.
The extrusion pressure is a key factor affecting the forming quality and bonding strength of finned tubes. Insufficient pressure may result in the material not being tightly bonded, resulting in gaps or delamination; Excessive pressure can cause excessive deformation of the material or damage to the equipment. Therefore, in the production process, it is necessary to reasonably control the extrusion pressure according to the properties of the material and the capacity of the equipment.
3. Fin design and optimization.
1. Design of fin shape and structure.
The shape and structure of the fins have a significant impact on the heat transfer efficiency and service life. Proper fin design can improve heat transfer efficiency, reduce energy consumption, and enhance the mechanical properties of finned tubes. Therefore, in the production process, it is necessary to optimize the design of the shape, height, spacing and other parameters of the fin to meet the needs of different application scenarios.
2. Selection of fin material and thickness.
The material and thickness of the fins are also key factors affecting the heat transfer efficiency and service life. Fins of different materials and thicknesses differ in terms of thermal conductivity, corrosion resistance, mechanical strength, etc. Therefore, in the production process, it is necessary to select the appropriate fin material and thickness according to the actual needs and application scenarios.
4. Heat treatment and surface treatment.
1. Control of heat treatment process.
Heat treatment is an important part of the production process of steel and aluminum extruded fin tubes, which can eliminate the residual stress inside the material and improve the mechanical properties of the material. In the production process, it is necessary to strictly control the parameters such as heat treatment temperature, time and cooling rate to ensure the stability of product quality and performance.
2. Application of surface treatment technology.
In order to improve the corrosion resistance and service life of steel and aluminum extruded fin tubes, surface treatment is usually required, such as spraying, electroplating, etc. In the production process, it is necessary to select appropriate surface treatment technology and coating or coating materials, and strictly control parameters such as temperature and time in the treatment process to ensure that the surface treatment effect meets the expected requirements.
5. Quality inspection and evaluation.
1. Quality inspection in the production process.
In the production process, the steel and aluminum extruded finned tube should be subject to strict quality inspection, including visual inspection, dimensional measurement, mechanical property testing, etc. By discovering and dealing with substandard products in a timely manner, the accumulation and expansion of defects can be avoided and the quality and performance of products can be guaranteed.
2. Product evaluation and testing.
Products need to be thoroughly evaluated and tested to verify their performance and longevity. This includes heat transfer efficiency tests, corrosion resistance tests, mechanical strength tests, and more. Through scientific and rigorous evaluation and testing methods, we can ensure that the products meet the requirements of the standard and meet the needs of use. Steel and aluminum extruded finned tubes