1. Material preparation: choose the appropriate metal material, usually steel or copper. These materials are subject to chemical analysis and physical property testing to ensure they meet the requirements.
2. Pretreatment: heat treatment of raw materials to improve their plasticity and ductility. This helps reduce the stress and hardness of the material, making it easier for further processing.
3. Tube making: Send the heated metal material into the cold drawing machine. The cold drawing machine is a specially designed equipment that gradually reduces the cross-sectional area of the metal material to the required size and shape through a continuous drawing process. During this process, the material is drawn and forged multiple times to increase its density and strength.
4. Cleaning and annealing: The cold-drawn pipe will be cleaned to remove surface grease and impurities. Then annealing is carried out, through the process of heating and cooling, the stress inside the material is eliminated, and its mechanical properties and toughness are improved.
5. Inspection and trimming: Strict quality inspection is carried out on the cold-drawn tubes, including visual inspection, dimension measurement, chemical composition analysis, etc. If defects or substandard areas are found, they will be repaired or discarded.
6. Surface treatment: Surface treatment of cold-drawn pipes, such as pickling, galvanizing, painting, etc., to improve its corrosion resistance and aesthetics.
7. Packaging and delivery: The produced cold-drawn tubes are packaged to protect their surfaces from damage and corrosion. Then, it leaves the factory, ready to be shipped to customers or markets.
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